1 Version 1.35.0 (2019-05-23)
2 ==========================
6 - [`FnOnce`, `FnMut`, and the `Fn` traits are now implemented for `Box<FnOnce>`,
7 `Box<FnMut>`, and `Box<Fn>` respectively.][59500]
8 - [You can now coerce closures into unsafe function pointers.][59580] e.g.
10 unsafe fn call_unsafe(func: unsafe fn()) {
15 unsafe { call_unsafe(|| {}); }
22 - [Added the `armv6-unknown-freebsd-gnueabihf` and
23 `armv7-unknown-freebsd-gnueabihf` targets.][58080]
24 - [Added the `wasm32-unknown-wasi` target.][59464]
29 - [`Thread` will now show its ID in `Debug` output.][59460]
30 - [`StdinLock`, `StdoutLock`, and `StderrLock` now implement `AsRawFd`.][59512]
31 - [`alloc::System` now implements `Default`.][59451]
32 - [Expanded `Debug` output (`{:#?}`) for structs now has a trailing comma on the
34 - [`char::{ToLowercase, ToUppercase}` now
35 implement `ExactSizeIterator`.][58778]
36 - [All `NonZero` numeric types now implement `FromStr`.][58717]
37 - [Removed the `Read` trait bounds
38 on the `BufReader::{get_ref, get_mut, into_inner}` methods.][58423]
39 - [You can now call the `dbg!` macro without any parameters to print the file
40 and line where it is called.][57847]
41 - [In place ASCII case conversions are now up to 4× faster.][59283]
42 e.g. `str::make_ascii_lowercase`
43 - [`hash_map::{OccupiedEntry, VacantEntry}` now implement `Sync`
50 - [`RefCell::replace_with`]
51 - [`RefCell::map_split`]
54 - [`RangeFrom::contains`]
55 - [`RangeTo::contains`]
56 - [`RangeInclusive::contains`]
57 - [`RangeToInclusive::contains`]
62 - [You can now set `cargo:rustc-cdylib-link-arg` at build time to pass custom
63 linker arguments when building a `cdylib`.][cargo/6298] Its usage is highly
68 - [The Rust toolchain is now available natively for musl based distros.][58575]
70 [59460]: https://github.com/rust-lang/rust/pull/59460/
71 [59464]: https://github.com/rust-lang/rust/pull/59464/
72 [59500]: https://github.com/rust-lang/rust/pull/59500/
73 [59512]: https://github.com/rust-lang/rust/pull/59512/
74 [59580]: https://github.com/rust-lang/rust/pull/59580/
75 [59283]: https://github.com/rust-lang/rust/pull/59283/
76 [59451]: https://github.com/rust-lang/rust/pull/59451/
77 [59076]: https://github.com/rust-lang/rust/pull/59076/
78 [58778]: https://github.com/rust-lang/rust/pull/58778/
79 [58717]: https://github.com/rust-lang/rust/pull/58717/
80 [58369]: https://github.com/rust-lang/rust/pull/58369/
81 [58423]: https://github.com/rust-lang/rust/pull/58423/
82 [58080]: https://github.com/rust-lang/rust/pull/58080/
83 [57847]: https://github.com/rust-lang/rust/pull/57847/
84 [58575]: https://github.com/rust-lang/rust/pull/58575
85 [cargo/6298]: https://github.com/rust-lang/cargo/pull/6298/
86 [`f32::copysign`]: https://doc.rust-lang.org/stable/std/primitive.f32.html#method.copysign
87 [`f64::copysign`]: https://doc.rust-lang.org/stable/std/primitive.f64.html#method.copysign
88 [`RefCell::replace_with`]: https://doc.rust-lang.org/stable/std/cell/struct.RefCell.html#method.replace_with
89 [`RefCell::map_split`]: https://doc.rust-lang.org/stable/std/cell/struct.RefCell.html#method.map_split
90 [`ptr::hash`]: https://doc.rust-lang.org/stable/std/ptr/fn.hash.html
91 [`Range::contains`]: https://doc.rust-lang.org/std/ops/struct.Range.html#method.contains
92 [`RangeFrom::contains`]: https://doc.rust-lang.org/std/ops/struct.RangeFrom.html#method.contains
93 [`RangeTo::contains`]: https://doc.rust-lang.org/std/ops/struct.RangeTo.html#method.contains
94 [`RangeInclusive::contains`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html#method.contains
95 [`RangeToInclusive::contains`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html#method.contains
96 [`Option::copied`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.copied
98 Version 1.34.2 (2019-05-14)
99 ===========================
101 * [Destabilize the `Error::type_id` function due to a security
102 vulnerability][60785] ([CVE-2019-12083])
104 [60785]: https://github.com/rust-lang/rust/pull/60785
105 [CVE-2019-12083]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12083
107 Version 1.34.1 (2019-04-25)
108 ===========================
110 * [Fix false positives for the `redundant_closure` Clippy lint][clippy/3821]
111 * [Fix false positives for the `missing_const_for_fn` Clippy lint][clippy/3844]
112 * [Fix Clippy panic when checking some macros][clippy/3805]
114 [clippy/3821]: https://github.com/rust-lang/rust-clippy/pull/3821
115 [clippy/3844]: https://github.com/rust-lang/rust-clippy/pull/3844
116 [clippy/3805]: https://github.com/rust-lang/rust-clippy/pull/3805
118 Version 1.34.0 (2019-04-11)
119 ==========================
123 - [You can now use `#[deprecated = "reason"]`][58166] as a shorthand for
124 `#[deprecated(note = "reason")]`. This was previously allowed by mistake
126 - [You can now accept token streams in `#[attr()]`,`#[attr[]]`, and
127 `#[attr{}]` procedural macros.][57367]
128 - [You can now write `extern crate self as foo;`][57407] to import your
129 crate's root into the extern prelude.
134 - [You can now target `riscv64imac-unknown-none-elf` and
135 `riscv64gc-unknown-none-elf`.][58406]
136 - [You can now enable linker plugin LTO optimisations with
137 `-C linker-plugin-lto`.][58057] This allows rustc to compile your Rust code
138 into LLVM bitcode allowing LLVM to perform LTO optimisations across C/C++ FFI
140 - [You can now target `powerpc64-unknown-freebsd`.][57809]
145 - [The trait bounds have been removed on some of `HashMap<K, V, S>`'s and
146 `HashSet<T, S>`'s basic methods.][58370] Most notably you no longer require
147 the `Hash` trait to create an iterator.
148 - [The `Ord` trait bounds have been removed on some of `BinaryHeap<T>`'s basic
149 methods.][58421] Most notably you no longer require the `Ord` trait to create
151 - [The methods `overflowing_neg` and `wrapping_neg` are now `const` functions
152 for all numeric types.][58044]
153 - [Indexing a `str` is now generic over all types that
154 implement `SliceIndex<str>`.][57604]
155 - [`str::trim`, `str::trim_matches`, `str::trim_{start, end}`, and
156 `str::trim_{start, end}_matches` are now `#[must_use]`][57106] and will
157 produce a warning if their returning type is unused.
158 - [The methods `checked_pow`, `saturating_pow`, `wrapping_pow`, and
159 `overflowing_pow` are now available for all numeric types.][57873] These are
160 equivalvent to methods such as `wrapping_add` for the `pow` operation.
169 * [`atomic::AtomicI16`]
170 * [`atomic::AtomicI32`]
171 * [`atomic::AtomicI64`]
172 * [`atomic::AtomicI8`]
173 * [`atomic::AtomicU16`]
174 * [`atomic::AtomicU32`]
175 * [`atomic::AtomicU64`]
176 * [`atomic::AtomicU8`]
177 * [`convert::Infallible`]
178 * [`convert::TryFrom`]
179 * [`convert::TryInto`]
181 * [`iter::successors`]
182 * [`num::NonZeroI128`]
183 * [`num::NonZeroI16`]
184 * [`num::NonZeroI32`]
185 * [`num::NonZeroI64`]
187 * [`num::NonZeroIsize`]
188 * [`slice::sort_by_cached_key`]
189 * [`str::escape_debug`]
190 * [`str::escape_default`]
191 * [`str::escape_unicode`]
192 * [`str::split_ascii_whitespace`]
195 * [`Instant::checked_add`]
196 * [`Instant::checked_sub`]
197 * [`SystemTime::checked_add`]
198 * [`SystemTime::checked_sub`]
202 - [You can now use alternative registries to crates.io.][cargo/6654]
206 - [You can now use the `?` operator in your documentation tests without manually
207 adding `fn main() -> Result<(), _> {}`.][56470]
211 - [`Command::before_exec` is now deprecated in favor of the
212 unsafe method `Command::pre_exec`.][58059]
213 - [Use of `ATOMIC_{BOOL, ISIZE, USIZE}_INIT` is now deprecated.][57425] As you
214 can now use `const` functions in `static` variables.
216 [58370]: https://github.com/rust-lang/rust/pull/58370/
217 [58406]: https://github.com/rust-lang/rust/pull/58406/
218 [58421]: https://github.com/rust-lang/rust/pull/58421/
219 [58166]: https://github.com/rust-lang/rust/pull/58166/
220 [58044]: https://github.com/rust-lang/rust/pull/58044/
221 [58057]: https://github.com/rust-lang/rust/pull/58057/
222 [58059]: https://github.com/rust-lang/rust/pull/58059/
223 [57809]: https://github.com/rust-lang/rust/pull/57809/
224 [57873]: https://github.com/rust-lang/rust/pull/57873/
225 [57604]: https://github.com/rust-lang/rust/pull/57604/
226 [57367]: https://github.com/rust-lang/rust/pull/57367/
227 [57407]: https://github.com/rust-lang/rust/pull/57407/
228 [57425]: https://github.com/rust-lang/rust/pull/57425/
229 [57106]: https://github.com/rust-lang/rust/pull/57106/
230 [56470]: https://github.com/rust-lang/rust/pull/56470/
231 [cargo/6654]: https://github.com/rust-lang/cargo/pull/6654/
232 [`Any::type_id`]: https://doc.rust-lang.org/std/any/trait.Any.html#tymethod.type_id
233 [`Error::type_id`]: https://doc.rust-lang.org/std/error/trait.Error.html#method.type_id
234 [`atomic::AtomicI16`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI16.html
235 [`atomic::AtomicI32`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI32.html
236 [`atomic::AtomicI64`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI64.html
237 [`atomic::AtomicI8`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI8.html
238 [`atomic::AtomicU16`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU16.html
239 [`atomic::AtomicU32`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU32.html
240 [`atomic::AtomicU64`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU64.html
241 [`atomic::AtomicU8`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html
242 [`convert::Infallible`]: https://doc.rust-lang.org/std/convert/enum.Infallible.html
243 [`convert::TryFrom`]: https://doc.rust-lang.org/std/convert/trait.TryFrom.html
244 [`convert::TryInto`]: https://doc.rust-lang.org/std/convert/trait.TryInto.html
245 [`iter::from_fn`]: https://doc.rust-lang.org/std/iter/fn.from_fn.html
246 [`iter::successors`]: https://doc.rust-lang.org/std/iter/fn.successors.html
247 [`num::NonZeroI128`]: https://doc.rust-lang.org/std/num/struct.NonZeroI128.html
248 [`num::NonZeroI16`]: https://doc.rust-lang.org/std/num/struct.NonZeroI16.html
249 [`num::NonZeroI32`]: https://doc.rust-lang.org/std/num/struct.NonZeroI32.html
250 [`num::NonZeroI64`]: https://doc.rust-lang.org/std/num/struct.NonZeroI64.html
251 [`num::NonZeroI8`]: https://doc.rust-lang.org/std/num/struct.NonZeroI8.html
252 [`num::NonZeroIsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroIsize.html
253 [`slice::sort_by_cached_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_by_cached_key
254 [`str::escape_debug`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_debug
255 [`str::escape_default`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_default
256 [`str::escape_unicode`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_unicode
257 [`str::split_ascii_whitespace`]: https://doc.rust-lang.org/std/primitive.str.html#method.split_ascii_whitespace
258 [`Instant::checked_add`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.checked_add
259 [`Instant::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.checked_sub
260 [`SystemTime::checked_add`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#method.checked_add
261 [`SystemTime::checked_sub`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#method.checked_sub
264 Version 1.33.0 (2019-02-28)
265 ==========================
269 - [You can now use the `cfg(target_vendor)` attribute.][57465] E.g.
270 `#[cfg(target_vendor="apple")] fn main() { println!("Hello Apple!"); }`
271 - [Integer patterns such as in a match expression can now be exhaustive.][56362]
272 E.g. You can have match statement on a `u8` that covers `0..=255` and
273 you would no longer be required to have a `_ => unreachable!()` case.
274 - [You can now have multiple patterns in `if let` and `while let`
275 expressions.][57532] You can do this with the same syntax as a `match`
285 let state = Creature::Crab("Ferris");
287 if let Creature::Crab(name) | Creature::Person(name) = state {
288 println!("This creature's name is: {}", name);
292 - [You can now have irrefutable `if let` and `while let` patterns.][57535] Using
293 this feature will by default produce a warning as this behaviour can be
294 unintuitive. E.g. `if let _ = 5 {}`
295 - [You can now use `let` bindings, assignments, expression statements,
296 and irrefutable pattern destructuring in const functions.][57175]
297 - [You can now call unsafe const functions.][57067] E.g.
299 const unsafe fn foo() -> i32 { 5 }
300 const fn bar() -> i32 {
304 - [You can now specify multiple attributes in a `cfg_attr` attribute.][57332]
305 E.g. `#[cfg_attr(all(), must_use, optimize)]`
306 - [You can now specify a specific alignment with the `#[repr(packed)]`
307 attribute.][57049] E.g. `#[repr(packed(2))] struct Foo(i16, i32);` is a struct
308 with an alignment of 2 bytes and a size of 6 bytes.
309 - [You can now import an item from a module as an `_`.][56303] This allows you to
310 import a trait's impls, and not have the name in the namespace. E.g.
312 use std::io::Read as _;
314 // Allowed as there is only one `Read` in the module.
317 - [You may now use `Rc`, `Arc`, and `Pin` as method receivers][56805].
321 - [You can now set a linker flavor for `rustc` with the `-Clinker-flavor`
322 command line argument.][56351]
323 - [The mininum required LLVM version has been bumped to 6.0.][56642]
324 - [Added support for the PowerPC64 architecture on FreeBSD.][57615]
325 - [The `x86_64-fortanix-unknown-sgx` target support has been upgraded to
326 tier 2 support.][57130] Visit the [platform support][platform-support] page for
327 information on Rust's platform support.
328 - [Added support for the `thumbv7neon-linux-androideabi` and
329 `thumbv7neon-unknown-linux-gnueabihf` targets.][56947]
330 - [Added support for the `x86_64-unknown-uefi` target.][56769]
334 - [The methods `overflowing_{add, sub, mul, shl, shr}` are now `const`
335 functions for all numeric types.][57566]
336 - [The methods `rotate_left`, `rotate_right`, and `wrapping_{add, sub, mul, shl, shr}`
337 are now `const` functions for all numeric types.][57105]
338 - [The methods `is_positive` and `is_negative` are now `const` functions for
339 all signed numeric types.][57105]
340 - [The `get` method for all `NonZero` types is now `const`.][57167]
341 - [The methods `count_ones`, `count_zeros`, `leading_zeros`, `trailing_zeros`,
342 `swap_bytes`, `from_be`, `from_le`, `to_be`, `to_le` are now `const` for all
343 numeric types.][57234]
344 - [`Ipv4Addr::new` is now a `const` function][57234]
348 - [`unix::FileExt::read_exact_at`]
349 - [`unix::FileExt::write_all_at`]
350 - [`Option::transpose`]
351 - [`Result::transpose`]
352 - [`convert::identity`]
355 - [`marker::PhantomPinned`]
356 - [`Vec::resize_with`]
357 - [`VecDeque::resize_with`]
358 - [`Duration::as_millis`]
359 - [`Duration::as_micros`]
360 - [`Duration::as_nanos`]
365 - [You can now publish crates that require a feature flag to compile with
366 `cargo publish --features` or `cargo publish --all-features`.][cargo/6453]
367 - [Cargo should now rebuild a crate if a file was modified during the initial
372 - The methods `str::{trim_left, trim_right, trim_left_matches, trim_right_matches}`
373 are now deprecated in the standard library, and their usage will now produce a warning.
374 Please use the `str::{trim_start, trim_end, trim_start_matches, trim_end_matches}`
376 - The `Error::cause` method has been deprecated in favor of `Error::source` which supports
378 - [Libtest no longer creates a new thread for each test when
379 `--test-threads=1`. It also runs the tests in deterministic order][56243]
381 [55982]: https://github.com/rust-lang/rust/pull/55982/
382 [56243]: https://github.com/rust-lang/rust/pull/56243
383 [56303]: https://github.com/rust-lang/rust/pull/56303/
384 [56351]: https://github.com/rust-lang/rust/pull/56351/
385 [56362]: https://github.com/rust-lang/rust/pull/56362
386 [56642]: https://github.com/rust-lang/rust/pull/56642/
387 [56769]: https://github.com/rust-lang/rust/pull/56769/
388 [56805]: https://github.com/rust-lang/rust/pull/56805
389 [56947]: https://github.com/rust-lang/rust/pull/56947/
390 [57049]: https://github.com/rust-lang/rust/pull/57049/
391 [57067]: https://github.com/rust-lang/rust/pull/57067/
392 [57105]: https://github.com/rust-lang/rust/pull/57105
393 [57130]: https://github.com/rust-lang/rust/pull/57130/
394 [57167]: https://github.com/rust-lang/rust/pull/57167/
395 [57175]: https://github.com/rust-lang/rust/pull/57175/
396 [57234]: https://github.com/rust-lang/rust/pull/57234/
397 [57332]: https://github.com/rust-lang/rust/pull/57332/
398 [57465]: https://github.com/rust-lang/rust/pull/57465/
399 [57532]: https://github.com/rust-lang/rust/pull/57532/
400 [57535]: https://github.com/rust-lang/rust/pull/57535/
401 [57566]: https://github.com/rust-lang/rust/pull/57566/
402 [57615]: https://github.com/rust-lang/rust/pull/57615/
403 [cargo/6453]: https://github.com/rust-lang/cargo/pull/6453/
404 [cargo/6484]: https://github.com/rust-lang/cargo/pull/6484/
405 [`unix::FileExt::read_exact_at`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html#method.read_exact_at
406 [`unix::FileExt::write_all_at`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html#method.write_all_at
407 [`Option::transpose`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.transpose
408 [`Result::transpose`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.transpose
409 [`convert::identity`]: https://doc.rust-lang.org/std/convert/fn.identity.html
410 [`pin::Pin`]: https://doc.rust-lang.org/std/pin/struct.Pin.html
411 [`marker::Unpin`]: https://doc.rust-lang.org/stable/std/marker/trait.Unpin.html
412 [`marker::PhantomPinned`]: https://doc.rust-lang.org/nightly/std/marker/struct.PhantomPinned.html
413 [`Vec::resize_with`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.resize_with
414 [`VecDeque::resize_with`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.resize_with
415 [`Duration::as_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_millis
416 [`Duration::as_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_micros
417 [`Duration::as_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_nanos
418 [platform-support]: https://forge.rust-lang.org/platform-support.html
420 Version 1.32.0 (2019-01-17)
421 ==========================
426 - [You can now use the `?` operator in macro definitions.][56245] The `?`
427 operator allows you to specify zero or one repetitions similar to the `*` and
429 - [Module paths with no leading keyword like `super`, `self`, or `crate`, will
430 now always resolve to the item (`enum`, `struct`, etc.) available in the
431 module if present, before resolving to a external crate or an item the prelude.][56759]
434 enum Color { Red, Green, Blue }
440 - [You can now match against `PhantomData<T>` types.][55837]
441 - [You can now match against literals in macros with the `literal`
442 specifier.][56072] This will match against a literal of any type.
443 E.g. `1`, `'A'`, `"Hello World"`
444 - [Self can now be used as a constructor and pattern for unit and tuple structs.][56365] E.g.
446 struct Point(i32, i32);
449 pub fn new(x: i32, y: i32) -> Self {
453 pub fn is_origin(&self) -> bool {
461 - [Self can also now be used in type definitions.][56366] E.g.
465 Self: PartialOrd<Self> // can write `Self` instead of `List<T>`
468 Cons(T, Box<Self>) // likewise here
471 - [You can now mark traits with `#[must_use]`.][55663] This provides a warning if
472 a `impl Trait` or `dyn Trait` is returned and unused in the program.
476 - [The default allocator has changed from jemalloc to the default allocator on
477 your system.][55238] The compiler itself on Linux & macOS will still use
478 jemalloc, but programs compiled with it will use the system allocator.
479 - [Added the `aarch64-pc-windows-msvc` target.][55702]
483 - [`PathBuf` now implements `FromStr`.][55148]
484 - [`Box<[T]>` now implements `FromIterator<T>`.][55843]
485 - [The `dbg!` macro has been stabilized.][56395] This macro enables you to
486 easily debug expressions in your rust program. E.g.
489 let b = dbg!(a * 2) + 1;
490 // ^-- prints: [src/main.rs:4] a * 2 = 4
494 The following APIs are now `const` functions and can be used in a
498 - [`UnsafeCell::get`]
501 - [`ManuallyDrop::new`]
502 - [`ManuallyDrop::into_inner`]
503 - [`RangeInclusive::start`]
504 - [`RangeInclusive::end`]
505 - [`NonNull::as_ptr`]
508 - [`Duration::as_secs`]
509 - [`Duration::subsec_millis`]
510 - [`Duration::subsec_micros`]
511 - [`Duration::subsec_nanos`]
513 - [`Ipv4Addr::is_unspecified`]
515 - [`Ipv6Addr::octets`]
519 - [`i8::to_be_bytes`]
520 - [`i8::to_le_bytes`]
521 - [`i8::to_ne_bytes`]
522 - [`i8::from_be_bytes`]
523 - [`i8::from_le_bytes`]
524 - [`i8::from_ne_bytes`]
525 - [`i16::to_be_bytes`]
526 - [`i16::to_le_bytes`]
527 - [`i16::to_ne_bytes`]
528 - [`i16::from_be_bytes`]
529 - [`i16::from_le_bytes`]
530 - [`i16::from_ne_bytes`]
531 - [`i32::to_be_bytes`]
532 - [`i32::to_le_bytes`]
533 - [`i32::to_ne_bytes`]
534 - [`i32::from_be_bytes`]
535 - [`i32::from_le_bytes`]
536 - [`i32::from_ne_bytes`]
537 - [`i64::to_be_bytes`]
538 - [`i64::to_le_bytes`]
539 - [`i64::to_ne_bytes`]
540 - [`i64::from_be_bytes`]
541 - [`i64::from_le_bytes`]
542 - [`i64::from_ne_bytes`]
543 - [`i128::to_be_bytes`]
544 - [`i128::to_le_bytes`]
545 - [`i128::to_ne_bytes`]
546 - [`i128::from_be_bytes`]
547 - [`i128::from_le_bytes`]
548 - [`i128::from_ne_bytes`]
549 - [`isize::to_be_bytes`]
550 - [`isize::to_le_bytes`]
551 - [`isize::to_ne_bytes`]
552 - [`isize::from_be_bytes`]
553 - [`isize::from_le_bytes`]
554 - [`isize::from_ne_bytes`]
555 - [`u8::to_be_bytes`]
556 - [`u8::to_le_bytes`]
557 - [`u8::to_ne_bytes`]
558 - [`u8::from_be_bytes`]
559 - [`u8::from_le_bytes`]
560 - [`u8::from_ne_bytes`]
561 - [`u16::to_be_bytes`]
562 - [`u16::to_le_bytes`]
563 - [`u16::to_ne_bytes`]
564 - [`u16::from_be_bytes`]
565 - [`u16::from_le_bytes`]
566 - [`u16::from_ne_bytes`]
567 - [`u32::to_be_bytes`]
568 - [`u32::to_le_bytes`]
569 - [`u32::to_ne_bytes`]
570 - [`u32::from_be_bytes`]
571 - [`u32::from_le_bytes`]
572 - [`u32::from_ne_bytes`]
573 - [`u64::to_be_bytes`]
574 - [`u64::to_le_bytes`]
575 - [`u64::to_ne_bytes`]
576 - [`u64::from_be_bytes`]
577 - [`u64::from_le_bytes`]
578 - [`u64::from_ne_bytes`]
579 - [`u128::to_be_bytes`]
580 - [`u128::to_le_bytes`]
581 - [`u128::to_ne_bytes`]
582 - [`u128::from_be_bytes`]
583 - [`u128::from_le_bytes`]
584 - [`u128::from_ne_bytes`]
585 - [`usize::to_be_bytes`]
586 - [`usize::to_le_bytes`]
587 - [`usize::to_ne_bytes`]
588 - [`usize::from_be_bytes`]
589 - [`usize::from_le_bytes`]
590 - [`usize::from_ne_bytes`]
594 - [You can now run `cargo c` as an alias for `cargo check`.][cargo/6218]
595 - [Usernames are now allowed in alt registry URLs.][cargo/6242]
599 - [`libproc_macro` has been added to the `rust-src` distribution.][55280]
603 - [The argument types for AVX's
604 `_mm256_stream_si256`, `_mm256_stream_pd`, `_mm256_stream_ps`][55610] have
605 been changed from `*const` to `*mut` as the previous implementation
609 [55148]: https://github.com/rust-lang/rust/pull/55148/
610 [55238]: https://github.com/rust-lang/rust/pull/55238/
611 [55280]: https://github.com/rust-lang/rust/pull/55280/
612 [55610]: https://github.com/rust-lang/rust/pull/55610/
613 [55663]: https://github.com/rust-lang/rust/pull/55663/
614 [55702]: https://github.com/rust-lang/rust/pull/55702/
615 [55837]: https://github.com/rust-lang/rust/pull/55837/
616 [55843]: https://github.com/rust-lang/rust/pull/55843/
617 [56072]: https://github.com/rust-lang/rust/pull/56072/
618 [56245]: https://github.com/rust-lang/rust/pull/56245/
619 [56365]: https://github.com/rust-lang/rust/pull/56365/
620 [56366]: https://github.com/rust-lang/rust/pull/56366/
621 [56395]: https://github.com/rust-lang/rust/pull/56395/
622 [56759]: https://github.com/rust-lang/rust/pull/56759/
623 [cargo/6218]: https://github.com/rust-lang/cargo/pull/6218/
624 [cargo/6242]: https://github.com/rust-lang/cargo/pull/6242/
625 [`CStr::as_ptr`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.as_ptr
626 [`Cell::as_ptr`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr
627 [`Duration::as_secs`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_secs
628 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
629 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
630 [`Duration::subsec_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_nanos
631 [`Ipv4Addr::is_unspecified`]: https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified
632 [`Ipv6Addr::new`]: https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.new
633 [`Ipv6Addr::octets`]: https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets
634 [`ManuallyDrop::into_inner`]: https://doc.rust-lang.org/std/mem/struct.ManuallyDrop.html#method.into_inner
635 [`ManuallyDrop::new`]: https://doc.rust-lang.org/std/mem/struct.ManuallyDrop.html#method.new
636 [`NonNull::as_ptr`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.as_ptr
637 [`RangeInclusive::end`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html#method.end
638 [`RangeInclusive::start`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html#method.start
639 [`UnsafeCell::get`]: https://doc.rust-lang.org/std/cell/struct.UnsafeCell.html#method.get
640 [`slice::as_ptr`]: https://doc.rust-lang.org/std/primitive.slice.html#method.as_ptr
641 [`char::is_ascii`]: https://doc.rust-lang.org/std/primitive.char.html#method.is_ascii
642 [`i128::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.from_be_bytes
643 [`i128::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.from_le_bytes
644 [`i128::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.from_ne_bytes
645 [`i128::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.to_be_bytes
646 [`i128::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.to_le_bytes
647 [`i128::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.to_ne_bytes
648 [`i16::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.from_be_bytes
649 [`i16::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.from_le_bytes
650 [`i16::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.from_ne_bytes
651 [`i16::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.to_be_bytes
652 [`i16::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.to_le_bytes
653 [`i16::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.to_ne_bytes
654 [`i32::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.from_be_bytes
655 [`i32::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.from_le_bytes
656 [`i32::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.from_ne_bytes
657 [`i32::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.to_be_bytes
658 [`i32::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.to_le_bytes
659 [`i32::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.to_ne_bytes
660 [`i64::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.from_be_bytes
661 [`i64::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.from_le_bytes
662 [`i64::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.from_ne_bytes
663 [`i64::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.to_be_bytes
664 [`i64::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.to_le_bytes
665 [`i64::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.to_ne_bytes
666 [`i8::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.from_be_bytes
667 [`i8::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.from_le_bytes
668 [`i8::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.from_ne_bytes
669 [`i8::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.to_be_bytes
670 [`i8::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.to_le_bytes
671 [`i8::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.to_ne_bytes
672 [`isize::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.from_be_bytes
673 [`isize::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.from_le_bytes
674 [`isize::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.from_ne_bytes
675 [`isize::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.to_be_bytes
676 [`isize::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.to_le_bytes
677 [`isize::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.to_ne_bytes
678 [`iter::empty`]: https://doc.rust-lang.org/std/iter/fn.empty.html
679 [`str::as_ptr`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_ptr
680 [`u128::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.from_be_bytes
681 [`u128::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.from_le_bytes
682 [`u128::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.from_ne_bytes
683 [`u128::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.to_be_bytes
684 [`u128::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.to_le_bytes
685 [`u128::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.to_ne_bytes
686 [`u16::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.from_be_bytes
687 [`u16::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.from_le_bytes
688 [`u16::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.from_ne_bytes
689 [`u16::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.to_be_bytes
690 [`u16::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.to_le_bytes
691 [`u16::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.to_ne_bytes
692 [`u32::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.from_be_bytes
693 [`u32::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.from_le_bytes
694 [`u32::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.from_ne_bytes
695 [`u32::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.to_be_bytes
696 [`u32::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.to_le_bytes
697 [`u32::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.to_ne_bytes
698 [`u64::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.from_be_bytes
699 [`u64::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.from_le_bytes
700 [`u64::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.from_ne_bytes
701 [`u64::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.to_be_bytes
702 [`u64::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.to_le_bytes
703 [`u64::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.to_ne_bytes
704 [`u8::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.from_be_bytes
705 [`u8::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.from_le_bytes
706 [`u8::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.from_ne_bytes
707 [`u8::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.to_be_bytes
708 [`u8::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.to_le_bytes
709 [`u8::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.to_ne_bytes
710 [`usize::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.from_be_bytes
711 [`usize::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.from_le_bytes
712 [`usize::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.from_ne_bytes
713 [`usize::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.to_be_bytes
714 [`usize::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.to_le_bytes
715 [`usize::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.to_ne_bytes
718 Version 1.31.1 (2018-12-20)
719 ===========================
721 - [Fix Rust failing to build on `powerpc-unknown-netbsd`][56562]
722 - [Fix broken go-to-definition in RLS][rls/1171]
723 - [Fix infinite loop on hover in RLS][rls/1170]
725 [56562]: https://github.com/rust-lang/rust/pull/56562
726 [rls/1171]: https://github.com/rust-lang/rls/issues/1171
727 [rls/1170]: https://github.com/rust-lang/rls/pull/1170
729 Version 1.31.0 (2018-12-06)
730 ==========================
734 - 🎉 [This version marks the release of the 2018 edition of Rust.][54057] 🎉
735 - [New lifetime elision rules now allow for eliding lifetimes in functions and
736 impl headers.][54778] E.g. `impl<'a> Reader for BufReader<'a> {}` can now be
737 `impl Reader for BufReader<'_> {}`. Lifetimes are still required to be defined
739 - [You can now define and use `const` functions.][54835] These are currently
740 a strict minimal subset of the [const fn RFC][RFC-911]. Refer to the
741 [language reference][const-reference] for what exactly is available.
742 - [You can now use tool lints, which allow you to scope lints from external
743 tools using attributes.][54870] E.g. `#[allow(clippy::filter_map)]`.
744 - [`#[no_mangle]` and `#[export_name]` attributes can now be located anywhere in
745 a crate, not just in exported functions.][54451]
746 - [You can now use parentheses in pattern matches.][54497]
750 - [Updated musl to 1.1.20][54430]
754 - [You can now convert `num::NonZero*` types to their raw equivalvents using the
755 `From` trait.][54240] E.g. `u8` now implements `From<NonZeroU8>`.
756 - [You can now convert a `&Option<T>` into `Option<&T>` and `&mut Option<T>`
757 into `Option<&mut T>` using the `From` trait.][53218]
758 - [You can now multiply (`*`) a `time::Duration` by a `u32`.][52813]
763 - [`slice::align_to`]
764 - [`slice::align_to_mut`]
765 - [`slice::chunks_exact`]
766 - [`slice::chunks_exact_mut`]
768 - [`slice::rchunks_mut`]
769 - [`slice::rchunks_exact`]
770 - [`slice::rchunks_exact_mut`]
771 - [`Option::replace`]
775 - [Cargo will now download crates in parallel using HTTP/2.][cargo/6005]
776 - [You can now rename packages in your Cargo.toml][cargo/6319] We have a guide
777 on [how to use the `package` key in your dependencies.][cargo-rename-reference]
779 [52813]: https://github.com/rust-lang/rust/pull/52813/
780 [53218]: https://github.com/rust-lang/rust/pull/53218/
781 [53555]: https://github.com/rust-lang/rust/issues/53555/
782 [54057]: https://github.com/rust-lang/rust/pull/54057/
783 [54240]: https://github.com/rust-lang/rust/pull/54240/
784 [54430]: https://github.com/rust-lang/rust/pull/54430/
785 [54451]: https://github.com/rust-lang/rust/pull/54451/
786 [54497]: https://github.com/rust-lang/rust/pull/54497/
787 [54778]: https://github.com/rust-lang/rust/pull/54778/
788 [54835]: https://github.com/rust-lang/rust/pull/54835/
789 [54870]: https://github.com/rust-lang/rust/pull/54870/
790 [RFC-911]: https://github.com/rust-lang/rfcs/pull/911
791 [`Option::replace`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.replace
792 [`slice::align_to_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.align_to_mut
793 [`slice::align_to`]: https://doc.rust-lang.org/std/primitive.slice.html#method.align_to
794 [`slice::chunks_exact_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.chunks_exact_mut
795 [`slice::chunks_exact`]: https://doc.rust-lang.org/std/primitive.slice.html#method.chunks_exact
796 [`slice::rchunks_exact_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks_mut
797 [`slice::rchunks_exact`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks_exact
798 [`slice::rchunks_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks_mut
799 [`slice::rchunks`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks
800 [cargo/6005]: https://github.com/rust-lang/cargo/pull/6005/
801 [cargo/6319]: https://github.com/rust-lang/cargo/pull/6319/
802 [cargo-rename-reference]: https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#renaming-dependencies-in-cargotoml
803 [const-reference]: https://doc.rust-lang.org/reference/items/functions.html#const-functions
805 Version 1.30.1 (2018-11-08)
806 ===========================
808 - [Fixed overflow ICE in rustdoc][54199]
809 - [Cap Cargo progress bar width at 60 in MSYS terminals][cargo/6122]
811 [54199]: https://github.com/rust-lang/rust/pull/54199
812 [cargo/6122]: https://github.com/rust-lang/cargo/pull/6122
814 Version 1.30.0 (2018-10-25)
815 ==========================
819 - [Procedural macros are now available.][52081] These kinds of macros allow for
820 more powerful code generation. There is a [new chapter available][proc-macros]
821 in the Rust Programming Language book that goes further in depth.
822 - [You can now use keywords as identifiers using the raw identifiers
823 syntax (`r#`),][53236] e.g. `let r#for = true;`
824 - [Using anonymous parameters in traits is now deprecated with a warning and
825 will be a hard error in the 2018 edition.][53272]
826 - [You can now use `crate` in paths.][54404] This allows you to refer to the
827 crate root in the path, e.g. `use crate::foo;` refers to `foo` in `src/lib.rs`.
828 - [Using a external crate no longer requires being prefixed with `::`.][54404]
829 Previously, using a external crate in a module without a use statement
830 required `let json = ::serde_json::from_str(foo);` but can now be written
831 as `let json = serde_json::from_str(foo);`.
832 - [You can now apply the `#[used]` attribute to static items to prevent the
833 compiler from optimising them away, even if they appear to be unused,][51363]
834 e.g. `#[used] static FOO: u32 = 1;`
835 - [You can now import and reexport macros from other crates with the `use`
836 syntax.][50911] Macros exported with `#[macro_export]` are now placed into
837 the root module of the crate. If your macro relies on calling other local
838 macros, it is recommended to export with the
839 `#[macro_export(local_inner_macros)]` attribute so users won't have to import
841 - [You can now catch visibility keywords (e.g. `pub`, `pub(crate)`) in macros
842 using the `vis` specifier.][53370]
843 - [Non-macro attributes now allow all forms of literals, not just
844 strings.][53044] Previously, you would write `#[attr("true")]`, and you can now
845 write `#[attr(true)]`.
846 - [You can now specify a function to handle a panic in the Rust runtime with the
847 `#[panic_handler]` attribute.][51366]
851 - [Added the `riscv32imc-unknown-none-elf` target.][53822]
852 - [Added the `aarch64-unknown-netbsd` target][53165]
856 - [`ManuallyDrop` now allows the inner type to be unsized.][53033]
860 - [`Ipv4Addr::BROADCAST`]
861 - [`Ipv4Addr::LOCALHOST`]
862 - [`Ipv4Addr::UNSPECIFIED`]
863 - [`Ipv6Addr::LOCALHOST`]
864 - [`Ipv6Addr::UNSPECIFIED`]
865 - [`Iterator::find_map`]
867 The following methods are replacement methods for `trim_left`, `trim_right`,
868 `trim_left_matches`, and `trim_right_matches`, which will be deprecated
870 - [`str::trim_end_matches`]
872 - [`str::trim_start_matches`]
873 - [`str::trim_start`]
877 - [`cargo run` doesn't require specifying a package in workspaces.][cargo/5877]
878 - [`cargo doc` now supports `--message-format=json`.][cargo/5878] This is
879 equivalent to calling `rustdoc --error-format=json`.
880 - [Cargo will now provide a progress bar for builds.][cargo/5995]
884 - [`rustdoc` allows you to specify what edition to treat your code as with the
885 `--edition` option.][54057]
886 - [`rustdoc` now has the `--color` (specify whether to output color) and
887 `--error-format` (specify error format, e.g. `json`) options.][53003]
888 - [We now distribute a `rust-gdbgui` script that invokes `gdbgui` with Rust
889 debug symbols.][53774]
890 - [Attributes from Rust tools such as `rustfmt` or `clippy` are now
891 available,][53459] e.g. `#[rustfmt::skip]` will skip formatting the next item.
893 [50911]: https://github.com/rust-lang/rust/pull/50911/
894 [51363]: https://github.com/rust-lang/rust/pull/51363/
895 [51366]: https://github.com/rust-lang/rust/pull/51366/
896 [52081]: https://github.com/rust-lang/rust/pull/52081/
897 [53003]: https://github.com/rust-lang/rust/pull/53003/
898 [53033]: https://github.com/rust-lang/rust/pull/53033/
899 [53044]: https://github.com/rust-lang/rust/pull/53044/
900 [53165]: https://github.com/rust-lang/rust/pull/53165/
901 [53213]: https://github.com/rust-lang/rust/pull/53213/
902 [53236]: https://github.com/rust-lang/rust/pull/53236/
903 [53272]: https://github.com/rust-lang/rust/pull/53272/
904 [53370]: https://github.com/rust-lang/rust/pull/53370/
905 [53459]: https://github.com/rust-lang/rust/pull/53459/
906 [53774]: https://github.com/rust-lang/rust/pull/53774/
907 [53822]: https://github.com/rust-lang/rust/pull/53822/
908 [54057]: https://github.com/rust-lang/rust/pull/54057/
909 [54146]: https://github.com/rust-lang/rust/pull/54146/
910 [54404]: https://github.com/rust-lang/rust/pull/54404/
911 [cargo/5877]: https://github.com/rust-lang/cargo/pull/5877/
912 [cargo/5878]: https://github.com/rust-lang/cargo/pull/5878/
913 [cargo/5995]: https://github.com/rust-lang/cargo/pull/5995/
914 [proc-macros]: https://doc.rust-lang.org/nightly/book/2018-edition/ch19-06-macros.html
916 [`Ipv4Addr::BROADCAST`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#associatedconstant.BROADCAST
917 [`Ipv4Addr::LOCALHOST`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#associatedconstant.LOCALHOST
918 [`Ipv4Addr::UNSPECIFIED`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#associatedconstant.UNSPECIFIED
919 [`Ipv6Addr::LOCALHOST`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#associatedconstant.LOCALHOST
920 [`Ipv6Addr::UNSPECIFIED`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#associatedconstant.UNSPECIFIED
921 [`Iterator::find_map`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.find_map
922 [`str::trim_end_matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_end_matches
923 [`str::trim_end`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_end
924 [`str::trim_start_matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_start_matches
925 [`str::trim_start`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_start
928 Version 1.29.2 (2018-10-11)
929 ===========================
931 - [Workaround for an aliasing-related LLVM bug, which caused miscompilation.][54639]
932 - The `rls-preview` component on the windows-gnu targets has been restored.
934 [54639]: https://github.com/rust-lang/rust/pull/54639
937 Version 1.29.1 (2018-09-25)
938 ===========================
943 - The standard library's `str::repeat` function contained an out of bounds write
944 caused by an integer overflow. This has been fixed by deterministically
945 panicking when an overflow happens.
947 Thank you to Scott McMurray for responsibily disclosing this vulnerability to
951 Version 1.29.0 (2018-09-13)
952 ==========================
956 - [Bumped minimum LLVM version to 5.0.][51899]
957 - [Added `powerpc64le-unknown-linux-musl` target.][51619]
958 - [Added `aarch64-unknown-hermit` and `x86_64-unknown-hermit` targets.][52861]
962 - [`Once::call_once` no longer requires `Once` to be `'static`.][52239]
963 - [`BuildHasherDefault` now implements `PartialEq` and `Eq`.][52402]
964 - [`Box<CStr>`, `Box<OsStr>`, and `Box<Path>` now implement `Clone`.][51912]
965 - [Implemented `PartialEq<&str>` for `OsString` and `PartialEq<OsString>`
967 - [`Cell<T>` now allows `T` to be unsized.][50494]
968 - [`SocketAddr` is now stable on Redox.][52656]
973 - [`Iterator::flatten`]
978 - [Cargo can silently fix some bad lockfiles.][cargo/5831] You can use
979 `--locked` to disable this behavior.
980 - [`cargo-install` will now allow you to cross compile an install
981 using `--target`.][cargo/5614]
982 - [Added the `cargo-fix` subcommand to automatically move project code from
983 2015 edition to 2018.][cargo/5723]
984 - [`cargo doc` can now optionally document private types using the
985 `--document-private-items` flag.][cargo/5543]
989 - [`rustdoc` now has the `--cap-lints` option which demotes all lints above
990 the specified level to that level.][52354] For example `--cap-lints warn`
991 will demote `deny` and `forbid` lints to `warn`.
992 - [`rustc` and `rustdoc` will now have the exit code of `1` if compilation
993 fails and `101` if there is a panic.][52197]
994 - [A preview of clippy has been made available through rustup.][51122]
995 You can install the preview with `rustup component add clippy-preview`.
999 - [`str::{slice_unchecked, slice_unchecked_mut}` are now deprecated.][51807]
1000 Use `str::get_unchecked(begin..end)` instead.
1001 - [`std::env::home_dir` is now deprecated for its unintuitive behavior.][51656]
1002 Consider using the `home_dir` function from
1003 https://crates.io/crates/dirs instead.
1004 - [`rustc` will no longer silently ignore invalid data in target spec.][52330]
1005 - [`cfg` attributes and `--cfg` command line flags are now more
1006 strictly validated.][53893]
1008 [53893]: https://github.com/rust-lang/rust/pull/53893/
1009 [52861]: https://github.com/rust-lang/rust/pull/52861/
1010 [52656]: https://github.com/rust-lang/rust/pull/52656/
1011 [52239]: https://github.com/rust-lang/rust/pull/52239/
1012 [52330]: https://github.com/rust-lang/rust/pull/52330/
1013 [52354]: https://github.com/rust-lang/rust/pull/52354/
1014 [52402]: https://github.com/rust-lang/rust/pull/52402/
1015 [52103]: https://github.com/rust-lang/rust/pull/52103/
1016 [52197]: https://github.com/rust-lang/rust/pull/52197/
1017 [51807]: https://github.com/rust-lang/rust/pull/51807/
1018 [51899]: https://github.com/rust-lang/rust/pull/51899/
1019 [51912]: https://github.com/rust-lang/rust/pull/51912/
1020 [51511]: https://github.com/rust-lang/rust/pull/51511/
1021 [51619]: https://github.com/rust-lang/rust/pull/51619/
1022 [51656]: https://github.com/rust-lang/rust/pull/51656/
1023 [51178]: https://github.com/rust-lang/rust/pull/51178/
1024 [51122]: https://github.com/rust-lang/rust/pull/51122
1025 [50494]: https://github.com/rust-lang/rust/pull/50494/
1026 [cargo/5543]: https://github.com/rust-lang/cargo/pull/5543
1027 [cargo/5614]: https://github.com/rust-lang/cargo/pull/5614/
1028 [cargo/5723]: https://github.com/rust-lang/cargo/pull/5723/
1029 [cargo/5831]: https://github.com/rust-lang/cargo/pull/5831/
1030 [`Arc::downcast`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.downcast
1031 [`Iterator::flatten`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.flatten
1032 [`Rc::downcast`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.downcast
1035 Version 1.28.0 (2018-08-02)
1036 ===========================
1040 - [The `#[repr(transparent)]` attribute is now stable.][51562] This attribute
1041 allows a Rust newtype wrapper (`struct NewType<T>(T);`) to be represented as
1042 the inner type across Foreign Function Interface (FFI) boundaries.
1043 - [The keywords `pure`, `sizeof`, `alignof`, and `offsetof` have been unreserved
1044 and can now be used as identifiers.][51196]
1045 - [The `GlobalAlloc` trait and `#[global_allocator]` attribute are now
1046 stable.][51241] This will allow users to specify a global allocator for
1048 - [Unit test functions marked with the `#[test]` attribute can now return
1049 `Result<(), E: Debug>` in addition to `()`.][51298]
1050 - [The `lifetime` specifier for `macro_rules!` is now stable.][50385] This
1051 allows macros to easily target lifetimes.
1055 - [The `s` and `z` optimisation levels are now stable.][50265] These optimisations
1056 prioritise making smaller binary sizes. `z` is the same as `s` with the
1057 exception that it does not vectorise loops, which typically results in an even
1059 - [The short error format is now stable.][49546] Specified with
1060 `--error-format=short` this option will provide a more compressed output of
1061 rust error messages.
1062 - [Added a lint warning when you have duplicated `macro_export`s.][50143]
1063 - [Reduced the number of allocations in the macro parser.][50855] This can
1064 improve compile times of macro heavy crates on average by 5%.
1068 - [Implemented `Default` for `&mut str`.][51306]
1069 - [Implemented `From<bool>` for all integer and unsigned number types.][50554]
1070 - [Implemented `Extend` for `()`.][50234]
1071 - [The `Debug` implementation of `time::Duration` should now be more easily
1072 human readable.][50364] Previously a `Duration` of one second would printed as
1073 `Duration { secs: 1, nanos: 0 }` and will now be printed as `1s`.
1074 - [Implemented `From<&String>` for `Cow<str>`, `From<&Vec<T>>` for `Cow<[T]>`,
1075 `From<Cow<CStr>>` for `CString`, `From<CString>, From<CStr>, From<&CString>`
1076 for `Cow<CStr>`, `From<OsString>, From<OsStr>, From<&OsString>` for
1077 `Cow<OsStr>`, `From<&PathBuf>` for `Cow<Path>`, and `From<Cow<Path>>`
1078 for `PathBuf`.][50170]
1079 - [Implemented `Shl` and `Shr` for `Wrapping<u128>`
1080 and `Wrapping<i128>`.][50465]
1081 - [`DirEntry::metadata` now uses `fstatat` instead of `lstat` when
1082 possible.][51050] This can provide up to a 40% speed increase.
1083 - [Improved error messages when using `format!`.][50610]
1087 - [`Iterator::step_by`]
1088 - [`Path::ancestors`]
1089 - [`SystemTime::UNIX_EPOCH`]
1090 - [`alloc::GlobalAlloc`]
1092 - [`alloc::LayoutErr`]
1095 - [`alloc::alloc_zeroed`]
1096 - [`alloc::dealloc`]
1097 - [`alloc::realloc`]
1098 - [`alloc::handle_alloc_error`]
1099 - [`btree_map::Entry::or_default`]
1100 - [`fmt::Alignment`]
1101 - [`hash_map::Entry::or_default`]
1102 - [`iter::repeat_with`]
1103 - [`num::NonZeroUsize`]
1104 - [`num::NonZeroU128`]
1105 - [`num::NonZeroU16`]
1106 - [`num::NonZeroU32`]
1107 - [`num::NonZeroU64`]
1108 - [`num::NonZeroU8`]
1109 - [`ops::RangeBounds`]
1110 - [`slice::SliceIndex`]
1111 - [`slice::from_mut`]
1112 - [`slice::from_ref`]
1113 - [`{Any + Send + Sync}::downcast_mut`]
1114 - [`{Any + Send + Sync}::downcast_ref`]
1115 - [`{Any + Send + Sync}::is`]
1119 - [Cargo will now no longer allow you to publish crates with build scripts that
1120 modify the `src` directory.][cargo/5584] The `src` directory in a crate should be
1121 considered to be immutable.
1125 - [The `suggestion_applicability` field in `rustc`'s json output is now
1126 stable.][50486] This will allow dev tools to check whether a code suggestion
1127 would apply to them.
1131 - [Rust will consider trait objects with duplicated constraints to be the same
1132 type as without the duplicated constraint.][51276] For example the below code will
1133 now fail to compile.
1138 fn test(&self) { println!("one"); } //~ ERROR duplicate definitions with name `test`
1141 impl Trait + Send + Send {
1142 fn test(&self) { println!("two"); }
1146 [49546]: https://github.com/rust-lang/rust/pull/49546/
1147 [50143]: https://github.com/rust-lang/rust/pull/50143/
1148 [50170]: https://github.com/rust-lang/rust/pull/50170/
1149 [50234]: https://github.com/rust-lang/rust/pull/50234/
1150 [50265]: https://github.com/rust-lang/rust/pull/50265/
1151 [50364]: https://github.com/rust-lang/rust/pull/50364/
1152 [50385]: https://github.com/rust-lang/rust/pull/50385/
1153 [50465]: https://github.com/rust-lang/rust/pull/50465/
1154 [50486]: https://github.com/rust-lang/rust/pull/50486/
1155 [50554]: https://github.com/rust-lang/rust/pull/50554/
1156 [50610]: https://github.com/rust-lang/rust/pull/50610/
1157 [50855]: https://github.com/rust-lang/rust/pull/50855/
1158 [51050]: https://github.com/rust-lang/rust/pull/51050/
1159 [51196]: https://github.com/rust-lang/rust/pull/51196/
1160 [51200]: https://github.com/rust-lang/rust/pull/51200/
1161 [51241]: https://github.com/rust-lang/rust/pull/51241/
1162 [51276]: https://github.com/rust-lang/rust/pull/51276/
1163 [51298]: https://github.com/rust-lang/rust/pull/51298/
1164 [51306]: https://github.com/rust-lang/rust/pull/51306/
1165 [51562]: https://github.com/rust-lang/rust/pull/51562/
1166 [cargo/5584]: https://github.com/rust-lang/cargo/pull/5584/
1167 [`Iterator::step_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.step_by
1168 [`Path::ancestors`]: https://doc.rust-lang.org/std/path/struct.Path.html#method.ancestors
1169 [`SystemTime::UNIX_EPOCH`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#associatedconstant.UNIX_EPOCH
1170 [`alloc::GlobalAlloc`]: https://doc.rust-lang.org/std/alloc/trait.GlobalAlloc.html
1171 [`alloc::Layout`]: https://doc.rust-lang.org/std/alloc/struct.Layout.html
1172 [`alloc::LayoutErr`]: https://doc.rust-lang.org/std/alloc/struct.LayoutErr.html
1173 [`alloc::System`]: https://doc.rust-lang.org/std/alloc/struct.System.html
1174 [`alloc::alloc`]: https://doc.rust-lang.org/std/alloc/fn.alloc.html
1175 [`alloc::alloc_zeroed`]: https://doc.rust-lang.org/std/alloc/fn.alloc_zeroed.html
1176 [`alloc::dealloc`]: https://doc.rust-lang.org/std/alloc/fn.dealloc.html
1177 [`alloc::realloc`]: https://doc.rust-lang.org/std/alloc/fn.realloc.html
1178 [`alloc::handle_alloc_error`]: https://doc.rust-lang.org/std/alloc/fn.handle_alloc_error.html
1179 [`btree_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.or_default
1180 [`fmt::Alignment`]: https://doc.rust-lang.org/std/fmt/enum.Alignment.html
1181 [`hash_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.or_default
1182 [`iter::repeat_with`]: https://doc.rust-lang.org/std/iter/fn.repeat_with.html
1183 [`num::NonZeroUsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroUsize.html
1184 [`num::NonZeroU128`]: https://doc.rust-lang.org/std/num/struct.NonZeroU128.html
1185 [`num::NonZeroU16`]: https://doc.rust-lang.org/std/num/struct.NonZeroU16.html
1186 [`num::NonZeroU32`]: https://doc.rust-lang.org/std/num/struct.NonZeroU32.html
1187 [`num::NonZeroU64`]: https://doc.rust-lang.org/std/num/struct.NonZeroU64.html
1188 [`num::NonZeroU8`]: https://doc.rust-lang.org/std/num/struct.NonZeroU8.html
1189 [`ops::RangeBounds`]: https://doc.rust-lang.org/std/ops/trait.RangeBounds.html
1190 [`slice::SliceIndex`]: https://doc.rust-lang.org/std/slice/trait.SliceIndex.html
1191 [`slice::from_mut`]: https://doc.rust-lang.org/std/slice/fn.from_mut.html
1192 [`slice::from_ref`]: https://doc.rust-lang.org/std/slice/fn.from_ref.html
1193 [`{Any + Send + Sync}::downcast_mut`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_mut-2
1194 [`{Any + Send + Sync}::downcast_ref`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_ref-2
1195 [`{Any + Send + Sync}::is`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.is-2
1197 Version 1.27.2 (2018-07-20)
1198 ===========================
1203 - The borrow checker was fixed to avoid potential unsoundness when using
1204 match ergonomics: [#52213][52213].
1206 [52213]: https://github.com/rust-lang/rust/issues/52213
1208 Version 1.27.1 (2018-07-10)
1209 ===========================
1214 - rustdoc would execute plugins in the /tmp/rustdoc/plugins directory
1215 when running, which enabled executing code as some other user on a
1216 given machine. This release fixes that vulnerability; you can read
1217 more about this on the [blog][rustdoc-sec]. The associated CVE is [CVE-2018-1000622].
1219 Thank you to Red Hat for responsibily disclosing this vulnerability to us.
1224 - The borrow checker was fixed to avoid an additional potential unsoundness when using
1225 match ergonomics: [#51415][51415], [#49534][49534].
1227 [51415]: https://github.com/rust-lang/rust/issues/51415
1228 [49534]: https://github.com/rust-lang/rust/issues/49534
1229 [rustdoc-sec]: https://blog.rust-lang.org/2018/07/06/security-advisory-for-rustdoc.html
1230 [CVE-2018-1000622]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=%20CVE-2018-1000622
1232 Version 1.27.0 (2018-06-21)
1233 ==========================
1237 - [Removed 'proc' from the reserved keywords list.][49699] This allows `proc` to
1238 be used as an identifier.
1239 - [The dyn syntax is now available.][49968] This syntax is equivalent to the
1240 bare `Trait` syntax, and should make it clearer when being used in tandem with
1241 `impl Trait` because it is equivalent to the following syntax:
1242 `&Trait == &dyn Trait`, `&mut Trait == &mut dyn Trait`, and
1243 `Box<Trait> == Box<dyn Trait>`.
1244 - [Attributes on generic parameters such as types and lifetimes are
1245 now stable.][48851] e.g.
1246 `fn foo<#[lifetime_attr] 'a, #[type_attr] T: 'a>() {}`
1247 - [The `#[must_use]` attribute can now also be used on functions as well as
1248 types.][48925] It provides a lint that by default warns users when the
1249 value returned by a function has not been used.
1253 - [Added the `armv5te-unknown-linux-musleabi` target.][50423]
1257 - [SIMD (Single Instruction Multiple Data) on x86/x86_64 is now stable.][49664]
1258 This includes [`arch::x86`] & [`arch::x86_64`] modules which contain
1259 SIMD intrinsics, a new macro called `is_x86_feature_detected!`, the
1260 `#[target_feature(enable="")]` attribute, and adding `target_feature = ""` to
1261 the `cfg` attribute.
1262 - [A lot of methods for `[u8]`, `f32`, and `f64` previously only available in
1263 std are now available in core.][49896]
1264 - [The generic `Rhs` type parameter on `ops::{Shl, ShlAssign, Shr}` now defaults
1266 - [`std::str::replace` now has the `#[must_use]` attribute][50177] to clarify
1267 that the operation isn't done in place.
1268 - [`Clone::clone`, `Iterator::collect`, and `ToOwned::to_owned` now have
1269 the `#[must_use]` attribute][49533] to warn about unused potentially
1270 expensive allocations.
1274 - [`DoubleEndedIterator::rfind`]
1275 - [`DoubleEndedIterator::rfold`]
1276 - [`DoubleEndedIterator::try_rfold`]
1277 - [`Duration::from_micros`]
1278 - [`Duration::from_nanos`]
1279 - [`Duration::subsec_micros`]
1280 - [`Duration::subsec_millis`]
1281 - [`HashMap::remove_entry`]
1282 - [`Iterator::try_fold`]
1283 - [`Iterator::try_for_each`]
1285 - [`Option::filter`]
1286 - [`String::replace_range`]
1287 - [`Take::set_limit`]
1288 - [`hint::unreachable_unchecked`]
1289 - [`os::unix::process::parent_id`]
1290 - [`ptr::swap_nonoverlapping`]
1291 - [`slice::rsplit_mut`]
1293 - [`slice::swap_with_slice`]
1297 - [`cargo-metadata` now includes `authors`, `categories`, `keywords`,
1298 `readme`, and `repository` fields.][cargo/5386]
1299 - [`cargo-metadata` now includes a package's `metadata` table.][cargo/5360]
1300 - [Added the `--target-dir` optional argument.][cargo/5393] This allows you to specify
1301 a different directory than `target` for placing compilation artifacts.
1302 - [Cargo will be adding automatic target inference for binaries, benchmarks,
1303 examples, and tests in the Rust 2018 edition.][cargo/5335] If your project specifies
1304 specific targets, e.g. using `[[bin]]`, and have other binaries in locations
1305 where cargo would infer a binary, Cargo will produce a warning. You can
1306 disable this feature ahead of time by setting any of the following to false:
1307 `autobins`, `autobenches`, `autoexamples`, `autotests`.
1308 - [Cargo will now cache compiler information.][cargo/5359] This can be disabled by
1309 setting `CARGO_CACHE_RUSTC_INFO=0` in your environment.
1313 - [Added “The Rustc book” into the official documentation.][49707]
1314 [“The Rustc book”] documents and teaches how to use the rustc compiler.
1315 - [All books available on `doc.rust-lang.org` are now searchable.][49623]
1319 - [Calling a `CharExt` or `StrExt` method directly on core will no longer
1320 work.][49896] e.g. `::core::prelude::v1::StrExt::is_empty("")` will not
1321 compile, `"".is_empty()` will still compile.
1322 - [`Debug` output on `atomic::{AtomicBool, AtomicIsize, AtomicPtr, AtomicUsize}`
1323 will only print the inner type.][48553] E.g.
1324 `print!("{:?}", AtomicBool::new(true))` will print `true`,
1325 not `AtomicBool(true)`.
1326 - [The maximum number for `repr(align(N))` is now 2²⁹.][50378] Previously you
1327 could enter higher numbers but they were not supported by LLVM. Up to 512MB
1328 alignment should cover all use cases.
1329 - The `.description()` method on the `std::error::Error` trait
1330 [has been soft-deprecated][50163]. It is no longer required to implement it.
1332 [48553]: https://github.com/rust-lang/rust/pull/48553/
1333 [48851]: https://github.com/rust-lang/rust/pull/48851/
1334 [48925]: https://github.com/rust-lang/rust/pull/48925/
1335 [49533]: https://github.com/rust-lang/rust/pull/49533/
1336 [49623]: https://github.com/rust-lang/rust/pull/49623/
1337 [49630]: https://github.com/rust-lang/rust/pull/49630/
1338 [49664]: https://github.com/rust-lang/rust/pull/49664/
1339 [49699]: https://github.com/rust-lang/rust/pull/49699/
1340 [49707]: https://github.com/rust-lang/rust/pull/49707/
1341 [49719]: https://github.com/rust-lang/rust/pull/49719/
1342 [49896]: https://github.com/rust-lang/rust/pull/49896/
1343 [49968]: https://github.com/rust-lang/rust/pull/49968/
1344 [50163]: https://github.com/rust-lang/rust/pull/50163
1345 [50177]: https://github.com/rust-lang/rust/pull/50177/
1346 [50378]: https://github.com/rust-lang/rust/pull/50378/
1347 [50398]: https://github.com/rust-lang/rust/pull/50398/
1348 [50423]: https://github.com/rust-lang/rust/pull/50423/
1349 [cargo/5203]: https://github.com/rust-lang/cargo/pull/5203/
1350 [cargo/5335]: https://github.com/rust-lang/cargo/pull/5335/
1351 [cargo/5359]: https://github.com/rust-lang/cargo/pull/5359/
1352 [cargo/5360]: https://github.com/rust-lang/cargo/pull/5360/
1353 [cargo/5386]: https://github.com/rust-lang/cargo/pull/5386/
1354 [cargo/5393]: https://github.com/rust-lang/cargo/pull/5393/
1355 [`DoubleEndedIterator::rfind`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfind
1356 [`DoubleEndedIterator::rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfold
1357 [`DoubleEndedIterator::try_rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.try_rfold
1358 [`Duration::from_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_micros
1359 [`Duration::from_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_nanos
1360 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
1361 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
1362 [`HashMap::remove_entry`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.remove_entry
1363 [`Iterator::try_fold`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_fold
1364 [`Iterator::try_for_each`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_for_each
1365 [`NonNull::cast`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.cast
1366 [`Option::filter`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.filter
1367 [`String::replace_range`]: https://doc.rust-lang.org/std/string/struct.String.html#method.replace_range
1368 [`Take::set_limit`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.set_limit
1369 [`hint::unreachable_unchecked`]: https://doc.rust-lang.org/std/hint/fn.unreachable_unchecked.html
1370 [`os::unix::process::parent_id`]: https://doc.rust-lang.org/std/os/unix/process/fn.parent_id.html
1371 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
1372 [`ptr::swap_nonoverlapping`]: https://doc.rust-lang.org/std/ptr/fn.swap_nonoverlapping.html
1373 [`slice::rsplit_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit_mut
1374 [`slice::rsplit`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit
1375 [`slice::swap_with_slice`]: https://doc.rust-lang.org/std/primitive.slice.html#method.swap_with_slice
1376 [`arch::x86_64`]: https://doc.rust-lang.org/std/arch/x86_64/index.html
1377 [`arch::x86`]: https://doc.rust-lang.org/std/arch/x86/index.html
1378 [“The Rustc book”]: https://doc.rust-lang.org/rustc
1381 Version 1.26.2 (2018-06-05)
1382 ==========================
1387 - [The borrow checker was fixed to avoid unsoundness when using match ergonomics.][51117]
1389 [51117]: https://github.com/rust-lang/rust/issues/51117
1392 Version 1.26.1 (2018-05-29)
1393 ==========================
1398 - [RLS now works on Windows.][50646]
1399 - [Rustfmt stopped badly formatting text in some cases.][rustfmt/2695]
1405 - [`fn main() -> impl Trait` no longer works for non-Termination
1407 This reverts an accidental stabilization.
1408 - [`NaN > NaN` no longer returns true in const-fn contexts.][50812]
1409 - [Prohibit using turbofish for `impl Trait` in method arguments.][50950]
1411 [50646]: https://github.com/rust-lang/rust/issues/50646
1412 [50656]: https://github.com/rust-lang/rust/pull/50656
1413 [50812]: https://github.com/rust-lang/rust/pull/50812
1414 [50950]: https://github.com/rust-lang/rust/issues/50950
1415 [rustfmt/2695]: https://github.com/rust-lang-nursery/rustfmt/issues/2695
1417 Version 1.26.0 (2018-05-10)
1418 ==========================
1422 - [Closures now implement `Copy` and/or `Clone` if all captured variables
1423 implement either or both traits.][49299]
1424 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
1425 - [The `'_` lifetime is now stable. The underscore lifetime can be used anywhere a
1426 lifetime can be elided.][49458]
1427 - [`impl Trait` is now stable allowing you to have abstract types in returns
1428 or in function parameters.][49255] E.g. `fn foo() -> impl Iterator<Item=u8>` or
1429 `fn open(path: impl AsRef<Path>)`.
1430 - [Pattern matching will now automatically apply dereferences.][49394]
1431 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
1432 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
1433 - [A lot of operations are now available in a const context.][46882] E.g. You
1434 can now index into constant arrays, reference and dereference into constants,
1435 and use tuple struct constructors.
1436 - [Fixed entry slice patterns are now stable.][48516] E.g.
1438 let points = [1, 2, 3, 4];
1440 [1, 2, 3, 4] => println!("All points were sequential."),
1441 _ => println!("Not all points were sequential."),
1448 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
1449 - [Fixed exponential projection complexity on nested types.][48296]
1450 This can provide up to a ~12% reduction in compile times for certain crates.
1451 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
1452 to remap path prefixes outputted by the compiler.
1453 - [Added `powerpc-unknown-netbsd` target.][48281]
1457 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
1458 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
1459 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
1460 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
1461 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
1462 - [`ascii::escape_default` is now available in libcore.][48735]
1463 - [Trailing commas are now supported in std and core macros.][48056]
1464 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
1465 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
1470 - [`*const T::copy_to_nonoverlapping`]
1471 - [`*const T::copy_to`]
1472 - [`*const T::read_unaligned`]
1473 - [`*const T::read_volatile`]
1474 - [`*const T::read`]
1476 - [`*const T::wrapping_add`]
1477 - [`*const T::wrapping_sub`]
1479 - [`*mut T::copy_to_nonoverlapping`]
1480 - [`*mut T::copy_to`]
1481 - [`*mut T::read_unaligned`]
1482 - [`*mut T::read_volatile`]
1484 - [`*mut T::replace`]
1487 - [`*mut T::wrapping_add`]
1488 - [`*mut T::wrapping_sub`]
1489 - [`*mut T::write_bytes`]
1490 - [`*mut T::write_unaligned`]
1491 - [`*mut T::write_volatile`]
1494 - [`FromUtf8Error::as_bytes`]
1495 - [`LocalKey::try_with`]
1496 - [`Option::cloned`]
1497 - [`btree_map::Entry::and_modify`]
1498 - [`fs::read_to_string`]
1501 - [`hash_map::Entry::and_modify`]
1502 - [`iter::FusedIterator`]
1503 - [`ops::RangeInclusive`]
1504 - [`ops::RangeToInclusive`]
1506 - [`slice::rotate_left`]
1507 - [`slice::rotate_right`]
1508 - [`String::retain`]
1513 - [Cargo will now output path to custom commands when `-v` is
1514 passed with `--list`][cargo/5041]
1515 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
1519 - [The second edition of "The Rust Programming Language" book is now recommended
1520 over the first.][48404]
1525 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
1526 syntax is now invalid.
1528 use std::ops::Fn as dyn;
1529 fn g(_: Box<dyn(std::fmt::Debug)>) {}
1531 - [The result of dereferences are no longer promoted to `'static`.][47408]
1535 const PAIR: &(i32, i32) = &(0, 1);
1536 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
1539 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
1540 - [`".e0"` will now no longer parse as `0.0` and will instead cause
1542 - [Removed hoedown from rustdoc.][48274]
1543 - [Bounds on higher-kinded lifetimes a hard error.][48326]
1545 [46882]: https://github.com/rust-lang/rust/pull/46882
1546 [47379]: https://github.com/rust-lang/rust/pull/47379
1547 [47408]: https://github.com/rust-lang/rust/pull/47408
1548 [47813]: https://github.com/rust-lang/rust/pull/47813
1549 [48056]: https://github.com/rust-lang/rust/pull/48056
1550 [48125]: https://github.com/rust-lang/rust/pull/48125
1551 [48166]: https://github.com/rust-lang/rust/pull/48166
1552 [48235]: https://github.com/rust-lang/rust/pull/48235
1553 [48274]: https://github.com/rust-lang/rust/pull/48274
1554 [48281]: https://github.com/rust-lang/rust/pull/48281
1555 [48296]: https://github.com/rust-lang/rust/pull/48296
1556 [48326]: https://github.com/rust-lang/rust/pull/48326
1557 [48359]: https://github.com/rust-lang/rust/pull/48359
1558 [48404]: https://github.com/rust-lang/rust/pull/48404
1559 [48481]: https://github.com/rust-lang/rust/pull/48481
1560 [48516]: https://github.com/rust-lang/rust/pull/48516
1561 [48628]: https://github.com/rust-lang/rust/pull/48628
1562 [48629]: https://github.com/rust-lang/rust/pull/48629
1563 [48657]: https://github.com/rust-lang/rust/pull/48657
1564 [48735]: https://github.com/rust-lang/rust/pull/48735
1565 [48978]: https://github.com/rust-lang/rust/pull/48978
1566 [49101]: https://github.com/rust-lang/rust/pull/49101
1567 [49109]: https://github.com/rust-lang/rust/pull/49109
1568 [49121]: https://github.com/rust-lang/rust/pull/49121
1569 [49162]: https://github.com/rust-lang/rust/pull/49162
1570 [49184]: https://github.com/rust-lang/rust/pull/49184
1571 [49234]: https://github.com/rust-lang/rust/pull/49234
1572 [49255]: https://github.com/rust-lang/rust/pull/49255
1573 [49299]: https://github.com/rust-lang/rust/pull/49299
1574 [49305]: https://github.com/rust-lang/rust/pull/49305
1575 [49394]: https://github.com/rust-lang/rust/pull/49394
1576 [49458]: https://github.com/rust-lang/rust/pull/49458
1577 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
1578 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
1579 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
1580 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
1581 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
1582 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
1583 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
1584 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
1585 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
1586 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
1587 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
1588 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
1589 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
1590 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
1591 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
1592 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
1593 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
1594 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
1595 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
1596 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
1597 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
1598 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
1599 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
1600 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
1601 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
1602 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
1603 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
1604 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
1605 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
1606 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
1607 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
1608 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
1609 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
1610 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
1611 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
1612 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
1613 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
1614 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
1615 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
1616 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
1617 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
1618 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
1621 Version 1.25.0 (2018-03-29)
1622 ==========================
1626 - [The `#[repr(align(x))]` attribute is now stable.][47006] [RFC 1358]
1627 - [You can now use nested groups of imports.][47948]
1628 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
1629 - [You can now have `|` at the start of a match arm.][47947] e.g.
1631 enum Foo { A, B, C }
1637 | Foo::B => println!("AB"),
1638 | Foo::C => println!("C"),
1645 - [Upgraded to LLVM 6.][47828]
1646 - [Added `-C lto=val` option.][47521]
1647 - [Added `i586-unknown-linux-musl` target][47282]
1651 - [Impl Send for `process::Command` on Unix.][47760]
1652 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
1653 - [`UnsafeCell::into_inner` is now safe.][47204]
1654 - [Implement libstd for CloudABI.][47268]
1655 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
1656 - [Implement `AsRef<Path>` for Component][46985]
1657 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
1658 - [Moved `Duration` to libcore.][46666]
1662 - [`Location::column`]
1665 The following functions can now be used in a constant expression.
1666 eg. `static MINUTE: Duration = Duration::from_secs(60);`
1667 - [`Duration::new`][47300]
1668 - [`Duration::from_secs`][47300]
1669 - [`Duration::from_millis`][47300]
1673 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
1674 - [`cargo new` now defaults to creating a binary crate, instead of a
1675 library crate.][cargo/5029]
1679 - [Rust by example is now shipped with new releases][46196]
1683 - [Deprecated `net::lookup_host`.][47510]
1684 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
1685 - The borrow checker was sometimes incorrectly permitting overlapping borrows
1686 around indexing operations (see [#47349][47349]). This has been fixed (which also
1687 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
1688 - [Removed deprecated unstable attribute `#[simd]`.][47251]
1690 [33903]: https://github.com/rust-lang/rust/pull/33903
1691 [47947]: https://github.com/rust-lang/rust/pull/47947
1692 [47948]: https://github.com/rust-lang/rust/pull/47948
1693 [47760]: https://github.com/rust-lang/rust/pull/47760
1694 [47790]: https://github.com/rust-lang/rust/pull/47790
1695 [47828]: https://github.com/rust-lang/rust/pull/47828
1696 [47398]: https://github.com/rust-lang/rust/pull/47398
1697 [47510]: https://github.com/rust-lang/rust/pull/47510
1698 [47521]: https://github.com/rust-lang/rust/pull/47521
1699 [47204]: https://github.com/rust-lang/rust/pull/47204
1700 [47251]: https://github.com/rust-lang/rust/pull/47251
1701 [47268]: https://github.com/rust-lang/rust/pull/47268
1702 [47282]: https://github.com/rust-lang/rust/pull/47282
1703 [47300]: https://github.com/rust-lang/rust/pull/47300
1704 [47349]: https://github.com/rust-lang/rust/pull/47349
1705 [46931]: https://github.com/rust-lang/rust/pull/46931
1706 [46985]: https://github.com/rust-lang/rust/pull/46985
1707 [47006]: https://github.com/rust-lang/rust/pull/47006
1708 [46830]: https://github.com/rust-lang/rust/pull/46830
1709 [46095]: https://github.com/rust-lang/rust/pull/46095
1710 [46666]: https://github.com/rust-lang/rust/pull/46666
1711 [46196]: https://github.com/rust-lang/rust/pull/46196
1712 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
1713 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
1714 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
1715 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
1716 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
1719 Version 1.24.1 (2018-03-01)
1720 ==========================
1722 - [Do not abort when unwinding through FFI][48251]
1723 - [Emit UTF-16 files for linker arguments on Windows][48318]
1724 - [Make the error index generator work again][48308]
1725 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
1727 [48251]: https://github.com/rust-lang/rust/issues/48251
1728 [48308]: https://github.com/rust-lang/rust/issues/48308
1729 [48318]: https://github.com/rust-lang/rust/issues/48318
1730 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
1733 Version 1.24.0 (2018-02-15)
1734 ==========================
1738 - [External `sysv64` ffi is now available.][46528]
1739 eg. `extern "sysv64" fn foo () {}`
1743 - [rustc now uses 16 codegen units by default for release builds.][46910]
1744 For the fastest builds, utilize `codegen-units=1`.
1745 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
1746 - [Add `aarch64-unknown-openbsd` support][46760]
1750 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
1751 improvement in performance in the majority of cases.
1752 - [`OsStr`'s `Debug` implementation is now lossless and consistent
1753 with Windows.][46798]
1754 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
1755 - [impl `From<bool>` for `AtomicBool`][46293]
1756 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
1757 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
1758 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
1759 - [float::from_bits now just uses transmute.][46012] This provides
1760 some optimisations from LLVM.
1761 - [Copied `AsciiExt` methods onto `char`][46077]
1762 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
1763 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
1764 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
1765 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
1769 - [`RefCell::replace`]
1771 - [`atomic::spin_loop_hint`]
1773 The following functions can now be used in a constant expression.
1774 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
1776 - [`AtomicBool::new`][46287]
1777 - [`AtomicUsize::new`][46287]
1778 - [`AtomicIsize::new`][46287]
1779 - [`AtomicPtr::new`][46287]
1780 - [`Cell::new`][46287]
1781 - [`{integer}::min_value`][46287]
1782 - [`{integer}::max_value`][46287]
1783 - [`mem::size_of`][46287]
1784 - [`mem::align_of`][46287]
1785 - [`ptr::null`][46287]
1786 - [`ptr::null_mut`][46287]
1787 - [`RefCell::new`][46287]
1788 - [`UnsafeCell::new`][46287]
1792 - [Added a `workspace.default-members` config that
1793 overrides implied `--all` in virtual workspaces.][cargo/4743]
1794 - [Enable incremental by default on development builds.][cargo/4817] Also added
1795 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
1796 per-project or global basis respectively.
1803 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
1804 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
1805 in accordance with IETF RFC 4291 §2.2.
1806 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
1807 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
1808 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
1809 - [Leading zeros in tuple struct members is now an error][47084]
1810 - [`column!()` macro is one-based instead of zero-based][46977]
1811 - [`fmt::Arguments` can no longer be shared across threads][45198]
1812 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
1813 - [Cargo sets a different working directory for the compiler][cargo/4788]
1815 [44884]: https://github.com/rust-lang/rust/pull/44884
1816 [45198]: https://github.com/rust-lang/rust/pull/45198
1817 [45506]: https://github.com/rust-lang/rust/pull/45506
1818 [45904]: https://github.com/rust-lang/rust/pull/45904
1819 [45990]: https://github.com/rust-lang/rust/pull/45990
1820 [46012]: https://github.com/rust-lang/rust/pull/46012
1821 [46077]: https://github.com/rust-lang/rust/pull/46077
1822 [46094]: https://github.com/rust-lang/rust/pull/46094
1823 [46284]: https://github.com/rust-lang/rust/pull/46284
1824 [46287]: https://github.com/rust-lang/rust/pull/46287
1825 [46293]: https://github.com/rust-lang/rust/pull/46293
1826 [46528]: https://github.com/rust-lang/rust/pull/46528
1827 [46671]: https://github.com/rust-lang/rust/pull/46671
1828 [46713]: https://github.com/rust-lang/rust/pull/46713
1829 [46735]: https://github.com/rust-lang/rust/pull/46735
1830 [46749]: https://github.com/rust-lang/rust/pull/46749
1831 [46760]: https://github.com/rust-lang/rust/pull/46760
1832 [46798]: https://github.com/rust-lang/rust/pull/46798
1833 [46828]: https://github.com/rust-lang/rust/pull/46828
1834 [46831]: https://github.com/rust-lang/rust/pull/46831
1835 [46833]: https://github.com/rust-lang/rust/pull/46833
1836 [46910]: https://github.com/rust-lang/rust/pull/46910
1837 [46977]: https://github.com/rust-lang/rust/pull/46977
1838 [47018]: https://github.com/rust-lang/rust/pull/47018
1839 [47080]: https://github.com/rust-lang/rust/pull/47080
1840 [47084]: https://github.com/rust-lang/rust/pull/47084
1841 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
1842 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
1843 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
1844 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
1845 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
1846 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
1849 Version 1.23.0 (2018-01-04)
1850 ==========================
1854 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
1855 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
1856 Which should fix some confusing errors in some operations.
1860 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
1861 undefined behavior.][45920]
1862 - [rustc now suggests renaming import if names clash.][45660]
1863 - [Display errors/warnings correctly when there are zero-width or
1864 wide characters.][45711]
1865 - [rustc now avoids unnecessary copies of arguments that are
1866 simple bindings][45380] This should improve memory usage on average by 5-10%.
1867 - [Updated musl used to build musl rustc to 1.1.17][45393]
1871 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
1872 - [Implement Hash for raw pointers to unsized types][45483]
1873 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
1874 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
1875 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
1876 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
1877 and `<*mut T>::as_mut`][44932]
1878 - [Optimized `Thread::{park, unpark}` implementation][45524]
1879 - [Improved `SliceExt::binary_search` performance.][45333]
1880 - [impl `FromIterator<()>` for `()`][45379]
1881 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
1889 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
1890 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
1891 - [Added unit test checking to `cargo check`][cargo/4592]
1892 - [Cargo now lets you install a specific version
1893 using `cargo install --version`][cargo/4637]
1897 - [Releases now ship with the Cargo book documentation.][45692]
1898 - [rustdoc now prints rendering warnings on every run.][45324]
1902 - [Changes have been made to type equality to make it more correct,
1903 in rare cases this could break some code.][45853] [Tracking issue for
1904 further information][45852]
1905 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
1906 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
1907 Android 9, the minimum supported version is Android 14.
1908 - [Bumped the minimum LLVM to 3.9][45326]
1910 [44042]: https://github.com/rust-lang/rust/pull/44042
1911 [44932]: https://github.com/rust-lang/rust/pull/44932
1912 [45267]: https://github.com/rust-lang/rust/pull/45267
1913 [45324]: https://github.com/rust-lang/rust/pull/45324
1914 [45326]: https://github.com/rust-lang/rust/pull/45326
1915 [45333]: https://github.com/rust-lang/rust/pull/45333
1916 [45379]: https://github.com/rust-lang/rust/pull/45379
1917 [45380]: https://github.com/rust-lang/rust/pull/45380
1918 [45393]: https://github.com/rust-lang/rust/pull/45393
1919 [45435]: https://github.com/rust-lang/rust/pull/45435
1920 [45483]: https://github.com/rust-lang/rust/pull/45483
1921 [45524]: https://github.com/rust-lang/rust/pull/45524
1922 [45571]: https://github.com/rust-lang/rust/pull/45571
1923 [45580]: https://github.com/rust-lang/rust/pull/45580
1924 [45610]: https://github.com/rust-lang/rust/pull/45610
1925 [45660]: https://github.com/rust-lang/rust/pull/45660
1926 [45692]: https://github.com/rust-lang/rust/pull/45692
1927 [45711]: https://github.com/rust-lang/rust/pull/45711
1928 [45772]: https://github.com/rust-lang/rust/pull/45772
1929 [45852]: https://github.com/rust-lang/rust/issues/45852
1930 [45853]: https://github.com/rust-lang/rust/pull/45853
1931 [45887]: https://github.com/rust-lang/rust/pull/45887
1932 [45920]: https://github.com/rust-lang/rust/pull/45920
1933 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
1934 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
1935 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
1938 Version 1.22.1 (2017-11-22)
1939 ==========================
1941 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
1943 [46183]: https://github.com/rust-lang/rust/pull/46183
1945 Version 1.22.0 (2017-11-22)
1946 ==========================
1950 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
1951 - [Now accepts underscores in unicode escapes][43716]
1952 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
1953 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
1957 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
1958 - [rustc will no longer inline in codegen units when compiling for debug][45075]
1959 This should decrease compile times for debug builds.
1960 - [strict memory alignment now enabled on ARMv6][45094]
1961 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
1965 - [Allow atomic operations up to 32 bits
1966 on `armv5te_unknown_linux_gnueabi`][44978]
1967 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
1968 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
1969 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
1970 - [Properly detect overflow in `Instant += Duration`.][44220]
1971 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
1972 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
1973 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
1980 - [Cargo will now build multi file examples in subdirectories of the `examples`
1981 folder that have a `main.rs` file.][cargo/4496]
1982 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
1983 the old format will continue to work and can be updated with `cargo update`.
1984 - [Now supports vendoring git repositories][cargo/3992]
1988 - [`libbacktrace` is now available on Apple platforms.][44251]
1989 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
1990 This now lets you specify that a given code example will fail to compile.
1994 - [The minimum Android version that rustc can build for has been bumped
1995 to `4.0` from `2.3`][45656]
1996 - [Allowing `T op= &T` for numeric types has broken some type
1997 inference cases][45480]
2000 [42526]: https://github.com/rust-lang/rust/pull/42526
2001 [43017]: https://github.com/rust-lang/rust/pull/43017
2002 [43716]: https://github.com/rust-lang/rust/pull/43716
2003 [43949]: https://github.com/rust-lang/rust/pull/43949
2004 [44015]: https://github.com/rust-lang/rust/pull/44015
2005 [44220]: https://github.com/rust-lang/rust/pull/44220
2006 [44251]: https://github.com/rust-lang/rust/pull/44251
2007 [44287]: https://github.com/rust-lang/rust/pull/44287
2008 [44303]: https://github.com/rust-lang/rust/pull/44303
2009 [44456]: https://github.com/rust-lang/rust/pull/44456
2010 [44466]: https://github.com/rust-lang/rust/pull/44466
2011 [44895]: https://github.com/rust-lang/rust/pull/44895
2012 [44966]: https://github.com/rust-lang/rust/pull/44966
2013 [44978]: https://github.com/rust-lang/rust/pull/44978
2014 [45041]: https://github.com/rust-lang/rust/pull/45041
2015 [45064]: https://github.com/rust-lang/rust/pull/45064
2016 [45075]: https://github.com/rust-lang/rust/pull/45075
2017 [45094]: https://github.com/rust-lang/rust/pull/45094
2018 [45095]: https://github.com/rust-lang/rust/pull/45095
2019 [45480]: https://github.com/rust-lang/rust/issues/45480
2020 [45656]: https://github.com/rust-lang/rust/pull/45656
2021 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
2022 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
2023 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
2030 Version 1.21.0 (2017-10-12)
2031 ==========================
2035 - [You can now use static references for literals.][43838]
2039 let x: &'static u32 = &0;
2042 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
2045 my_macro!(Vec<i32>::new); // Always worked
2046 my_macro!(Vec::<i32>::new); // Now works
2051 - [Upgraded jemalloc to 4.5.0][43911]
2052 - [Enabled unwinding panics on Redox][43917]
2053 - [Now runs LLVM in parallel during translation phase.][43506]
2054 This should reduce peak memory usage.
2058 - [Generate builtin impls for `Clone` for all arrays and tuples that
2059 are `T: Clone`][43690]
2060 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
2061 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
2062 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
2067 [`std::mem::discriminant`]
2071 - [You can now call `cargo install` with multiple package names][cargo/4216]
2072 - [Cargo commands inside a virtual workspace will now implicitly
2073 pass `--all`][cargo/4335]
2074 - [Added a `[patch]` section to `Cargo.toml` to handle
2075 prepublication dependencies][cargo/4123] [RFC 1969]
2076 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
2077 like patterns][cargo/4270]
2078 - [Added the `--all-targets` option][cargo/4400]
2079 - [Using required dependencies as a feature is now deprecated and emits
2080 a warning][cargo/4364]
2085 - [Cargo docs are moving][43916]
2086 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
2087 - [The rustdoc book is now available][43863]
2088 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
2089 - [Added a preview of RLS has been made available through rustup][44204]
2090 Install with `rustup component add rls-preview`
2091 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
2092 Previously only showed `std::os::unix`.
2096 - [Changes in method matching against higher-ranked types][43880] This may cause
2097 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
2098 - [rustc's JSON error output's byte position start at top of file.][42973]
2099 Was previously relative to the rustc's internal `CodeMap` struct which
2100 required the unstable library `libsyntax` to correctly use.
2101 - [`unused_results` lint no longer ignores booleans][43728]
2103 [42565]: https://github.com/rust-lang/rust/pull/42565
2104 [42973]: https://github.com/rust-lang/rust/pull/42973
2105 [43348]: https://github.com/rust-lang/rust/pull/43348
2106 [43459]: https://github.com/rust-lang/rust/pull/43459
2107 [43506]: https://github.com/rust-lang/rust/pull/43506
2108 [43540]: https://github.com/rust-lang/rust/pull/43540
2109 [43690]: https://github.com/rust-lang/rust/pull/43690
2110 [43728]: https://github.com/rust-lang/rust/pull/43728
2111 [43838]: https://github.com/rust-lang/rust/pull/43838
2112 [43863]: https://github.com/rust-lang/rust/pull/43863
2113 [43880]: https://github.com/rust-lang/rust/pull/43880
2114 [43911]: https://github.com/rust-lang/rust/pull/43911
2115 [43916]: https://github.com/rust-lang/rust/pull/43916
2116 [43917]: https://github.com/rust-lang/rust/pull/43917
2117 [44204]: https://github.com/rust-lang/rust/pull/44204
2118 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
2119 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
2120 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
2121 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
2122 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
2123 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
2124 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
2125 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
2126 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
2128 Version 1.20.0 (2017-08-31)
2129 ===========================
2133 - [Associated constants are now stabilised.][42809]
2134 - [A lot of macro bugs are now fixed.][42913]
2139 - [Struct fields are now properly coerced to the expected field type.][42807]
2140 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
2141 `wasm32-experimental-emscripten` target.
2142 - [Changed some of the error messages to be more helpful.][42033]
2143 - [Add support for RELRO(RELocation Read-Only) for platforms that support
2145 - [rustc now reports the total number of errors on compilation failure][43015]
2146 previously this was only the number of errors in the pass that failed.
2147 - [Expansion in rustc has been sped up 29x.][42533]
2148 - [added `msp430-none-elf` target.][43099]
2149 - [rustc will now suggest one-argument enum variant to fix type mismatch when
2151 - [Fixes backtraces on Redox][43228]
2152 - [rustc now identifies different versions of same crate when absolute paths of
2153 different types match in an error message.][42826]
2159 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
2160 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
2162 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
2163 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
2164 - [Impl `Clone` for `DefaultHasher`.][42799]
2165 - [Impl `Sync` for `SyncSender`.][42397]
2166 - [Impl `FromStr` for `char`][42271]
2167 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
2169 - [allow messages in the `unimplemented!()` macro.][42155]
2170 ie. `unimplemented!("Waiting for 1.21 to be stable")`
2171 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
2172 - [Upgrade to Unicode 10.0.0][42999]
2173 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
2174 - [Skip the main thread's manual stack guard on Linux][43072]
2175 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
2176 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
2178 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
2183 - [`CStr::into_c_string`]
2184 - [`CString::as_c_str`]
2185 - [`CString::into_boxed_c_str`]
2186 - [`Chain::get_mut`]
2187 - [`Chain::get_ref`]
2188 - [`Chain::into_inner`]
2189 - [`Option::get_or_insert_with`]
2190 - [`Option::get_or_insert`]
2191 - [`OsStr::into_os_string`]
2192 - [`OsString::into_boxed_os_str`]
2195 - [`Utf8Error::error_len`]
2196 - [`char::EscapeDebug`]
2197 - [`char::escape_debug`]
2198 - [`compile_error!`]
2199 - [`f32::from_bits`]
2201 - [`f64::from_bits`]
2203 - [`mem::ManuallyDrop`]
2204 - [`slice::sort_unstable_by_key`]
2205 - [`slice::sort_unstable_by`]
2206 - [`slice::sort_unstable`]
2207 - [`str::from_boxed_utf8_unchecked`]
2208 - [`str::as_bytes_mut`]
2209 - [`str::as_bytes_mut`]
2210 - [`str::from_utf8_mut`]
2211 - [`str::from_utf8_unchecked_mut`]
2213 - [`str::get_unchecked_mut`]
2214 - [`str::get_unchecked`]
2216 - [`str::into_boxed_bytes`]
2221 - [Cargo API token location moved from `~/.cargo/config` to
2222 `~/.cargo/credentials`.][cargo/3978]
2223 - [Cargo will now build `main.rs` binaries that are in sub-directories of
2224 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
2225 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
2226 - [You can now specify version of a binary when installed through
2227 `cargo install` using `--vers`.][cargo/4229]
2228 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
2229 failure.][cargo/4248]
2230 - [Changed the convention around which file is the crate root.][cargo/4259]
2231 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
2232 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
2237 - [Functions with `'static` in their return types will now not be as usable as
2238 if they were using lifetime parameters instead.][42417]
2239 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
2240 takes the sign of NaN into account where previously didn't.][42430]
2242 [42033]: https://github.com/rust-lang/rust/pull/42033
2243 [42155]: https://github.com/rust-lang/rust/pull/42155
2244 [42271]: https://github.com/rust-lang/rust/pull/42271
2245 [42397]: https://github.com/rust-lang/rust/pull/42397
2246 [42417]: https://github.com/rust-lang/rust/pull/42417
2247 [42430]: https://github.com/rust-lang/rust/pull/42430
2248 [42431]: https://github.com/rust-lang/rust/pull/42431
2249 [42533]: https://github.com/rust-lang/rust/pull/42533
2250 [42571]: https://github.com/rust-lang/rust/pull/42571
2251 [42613]: https://github.com/rust-lang/rust/pull/42613
2252 [42799]: https://github.com/rust-lang/rust/pull/42799
2253 [42807]: https://github.com/rust-lang/rust/pull/42807
2254 [42809]: https://github.com/rust-lang/rust/pull/42809
2255 [42822]: https://github.com/rust-lang/rust/pull/42822
2256 [42826]: https://github.com/rust-lang/rust/pull/42826
2257 [42854]: https://github.com/rust-lang/rust/pull/42854
2258 [42913]: https://github.com/rust-lang/rust/pull/42913
2259 [42999]: https://github.com/rust-lang/rust/pull/42999
2260 [43011]: https://github.com/rust-lang/rust/pull/43011
2261 [43015]: https://github.com/rust-lang/rust/pull/43015
2262 [43072]: https://github.com/rust-lang/rust/pull/43072
2263 [43077]: https://github.com/rust-lang/rust/pull/43077
2264 [43097]: https://github.com/rust-lang/rust/pull/43097
2265 [43099]: https://github.com/rust-lang/rust/pull/43099
2266 [43170]: https://github.com/rust-lang/rust/pull/43170
2267 [43178]: https://github.com/rust-lang/rust/pull/43178
2268 [43185]: https://github.com/rust-lang/rust/pull/43185
2269 [43228]: https://github.com/rust-lang/rust/pull/43228
2270 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
2271 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
2272 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
2273 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
2274 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
2275 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
2276 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
2277 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
2278 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
2279 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
2280 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
2281 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
2282 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
2283 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
2284 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
2285 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
2286 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
2287 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
2288 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
2289 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
2290 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
2291 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
2292 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
2293 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
2294 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
2295 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
2296 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
2297 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
2298 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
2299 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
2300 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
2301 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
2302 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
2303 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
2304 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
2305 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
2306 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
2307 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
2308 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
2311 Version 1.19.0 (2017-07-20)
2312 ===========================
2317 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
2318 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
2319 - [Macro recursion limit increased to 1024 from 64.][41676]
2320 - [Added lint for detecting unused macros.][41907]
2321 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
2322 For example: `let x = loop { break 7; };`
2323 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
2324 contain `Copy` types and cannot have a `Drop` implementation.
2325 Example: `union Foo { bar: u8, baz: usize }`
2326 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
2327 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
2332 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
2333 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
2334 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
2335 you should use `--target armv7-linux-androideabi`.
2336 - [Fixed ICE when removing a source file between compilation sessions.][41873]
2337 - [Minor optimisation of string operations.][42037]
2338 - [Compiler error message is now `aborting due to previous error(s)` instead of
2339 `aborting due to N previous errors`][42150] This was previously inaccurate and
2340 would only count certain kinds of errors.
2341 - [The compiler now supports Visual Studio 2017][42225]
2342 - [The compiler is now built against LLVM 4.0.1 by default][42948]
2343 - [Added a lot][42264] of [new error codes][42302]
2344 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
2345 libraries with C Run-time Libraries(CRT) to be statically linked.
2346 - [Fixed various ARM codegen bugs][42740]
2351 - [`String` now implements `FromIterator<Cow<'a, str>>` and
2352 `Extend<Cow<'a, str>>`][41449]
2353 - [`Vec` now implements `From<&mut [T]>`][41530]
2354 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
2355 - [`SplitWhitespace` now implements `Clone`][41659]
2356 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
2358 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
2359 macros, but for printing to stderr.
2364 - [`OsString::shrink_to_fit`]
2367 - [`thread::ThreadId`]
2372 - [Build scripts can now add environment variables to the environment
2373 the crate is being compiled in.
2374 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
2375 - [Subcommands now replace the current process rather than spawning a new
2376 child process][cargo/3970]
2377 - [Workspace members can now accept glob file patterns][cargo/3979]
2378 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
2379 the members in a given workspace.][cargo/3988]
2380 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
2381 - [Target directory path is now in the cargo metadata][cargo/4022]
2382 - [Cargo no longer checks out a local working directory for the
2383 crates.io index][cargo/4026] This should provide smaller file size for the
2384 registry, and improve cloning times, especially on Windows machines.
2385 - [Added an `--exclude` option for excluding certain packages when using the
2386 `--all` option][cargo/4031]
2387 - [Cargo will now automatically retry when receiving a 5xx error
2388 from crates.io][cargo/4032]
2389 - [The `--features` option now accepts multiple comma or space
2390 delimited values.][cargo/4084]
2391 - [Added support for custom target specific runners][cargo/3954]
2396 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
2398 - [Rust will now release XZ compressed packages][rust-installer/57]
2399 - [rustup will now prefer to download rust packages with
2400 XZ compression][rustup/1100] over GZip packages.
2401 - [Added the ability to escape `#` in rust documentation][41785] By adding
2402 additional `#`'s ie. `##` is now `#`
2407 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
2408 - [`-Z` flags are now no longer allowed to be used on the stable
2409 compiler.][41751] This has been a warning for a year previous to this.
2410 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
2411 longer works][42844]. Users should migrate to the built-in `check`
2412 command, which has been available since 1.16.
2413 - [Ending a float literal with `._` is now a hard error.
2414 Example: `42._` .][41946]
2415 - [Any use of a private `extern crate` outside of its module is now a
2416 hard error.][36886] This was previously a warning.
2417 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
2418 relative while the `::` prefix makes a path absolute, but was ignored and the
2419 path was relative regardless.
2420 - [Floating point constants in match patterns is now a hard error][36890]
2421 This was previously a warning.
2422 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
2423 match patterns is now a hard error][36891] This was previously a warning.
2424 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
2426 - [From the pound escape, lines consisting of multiple `#`s are
2428 - [It is an error to re-export private enum variants][42460]. This is
2429 known to break a number of crates that depend on an older version of
2431 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
2432 to use it to find the linker, and the build will fail where it did
2433 not previously][42607]
2435 [36886]: https://github.com/rust-lang/rust/issues/36886
2436 [36888]: https://github.com/rust-lang/rust/issues/36888
2437 [36890]: https://github.com/rust-lang/rust/issues/36890
2438 [36891]: https://github.com/rust-lang/rust/issues/36891
2439 [36892]: https://github.com/rust-lang/rust/issues/36892
2440 [37406]: https://github.com/rust-lang/rust/issues/37406
2441 [39983]: https://github.com/rust-lang/rust/pull/39983
2442 [41145]: https://github.com/rust-lang/rust/pull/41145
2443 [41192]: https://github.com/rust-lang/rust/pull/41192
2444 [41258]: https://github.com/rust-lang/rust/pull/41258
2445 [41370]: https://github.com/rust-lang/rust/pull/41370
2446 [41449]: https://github.com/rust-lang/rust/pull/41449
2447 [41530]: https://github.com/rust-lang/rust/pull/41530
2448 [41624]: https://github.com/rust-lang/rust/pull/41624
2449 [41656]: https://github.com/rust-lang/rust/pull/41656
2450 [41659]: https://github.com/rust-lang/rust/pull/41659
2451 [41676]: https://github.com/rust-lang/rust/pull/41676
2452 [41751]: https://github.com/rust-lang/rust/pull/41751
2453 [41764]: https://github.com/rust-lang/rust/pull/41764
2454 [41785]: https://github.com/rust-lang/rust/pull/41785
2455 [41873]: https://github.com/rust-lang/rust/pull/41873
2456 [41907]: https://github.com/rust-lang/rust/pull/41907
2457 [41946]: https://github.com/rust-lang/rust/pull/41946
2458 [42016]: https://github.com/rust-lang/rust/pull/42016
2459 [42037]: https://github.com/rust-lang/rust/pull/42037
2460 [42068]: https://github.com/rust-lang/rust/pull/42068
2461 [42150]: https://github.com/rust-lang/rust/pull/42150
2462 [42162]: https://github.com/rust-lang/rust/pull/42162
2463 [42225]: https://github.com/rust-lang/rust/pull/42225
2464 [42264]: https://github.com/rust-lang/rust/pull/42264
2465 [42302]: https://github.com/rust-lang/rust/pull/42302
2466 [42460]: https://github.com/rust-lang/rust/issues/42460
2467 [42607]: https://github.com/rust-lang/rust/issues/42607
2468 [42740]: https://github.com/rust-lang/rust/pull/42740
2469 [42844]: https://github.com/rust-lang/rust/issues/42844
2470 [42948]: https://github.com/rust-lang/rust/pull/42948
2471 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
2472 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
2473 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
2474 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
2475 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
2476 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
2477 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
2478 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
2479 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
2480 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
2481 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
2482 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
2483 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
2484 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
2485 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
2486 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
2487 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
2488 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
2489 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
2490 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
2491 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
2492 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
2495 Version 1.18.0 (2017-06-08)
2496 ===========================
2501 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
2502 make the item visible to just that module tree. Also accepts the keyword
2503 `crate` to make something public to the whole crate but not users of the
2504 library. Example: `pub(crate) mod utils;`. [RFC 1422].
2505 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
2506 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
2507 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
2508 types like `Write + Send`, trailing `+` are now supported in trait objects,
2509 and better error reporting for trait objects starting with `?Sized`.
2510 - [0e+10 is now a valid floating point literal][40589]
2511 - [Now warns if you bind a lifetime parameter to 'static][40734]
2512 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
2513 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
2514 representation in some cases.][40377]
2519 - [rustc can now emit mir with `--emit mir`][39891]
2520 - [Improved LLVM IR for trivial functions][40367]
2521 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
2522 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
2523 opportunities found through profiling
2524 - [Improved backtrace formatting when panicking][38165]
2529 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
2530 iterator hasn't been advanced the original `Vec` is reassembled with no actual
2531 iteration or reallocation.
2532 - [Simplified HashMap Bucket interface][40561] provides performance
2533 improvements for iterating and cloning.
2534 - [Specialize Vec::from_elem to use calloc][40409]
2535 - [Fixed Race condition in fs::create_dir_all][39799]
2536 - [No longer caching stdio on Windows][40516]
2537 - [Optimized insertion sort in slice][40807] insertion sort in some cases
2538 2.50%~ faster and in one case now 12.50% faster.
2539 - [Optimized `AtomicBool::fetch_nand`][41143]
2544 - [`Child::try_wait`]
2545 - [`HashMap::retain`]
2546 - [`HashSet::retain`]
2548 - [`TcpStream::peek`]
2549 - [`UdpSocket::peek`]
2550 - [`UdpSocket::peek_from`]
2555 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
2556 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
2557 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
2558 - [Added Android build support][cargo/3885]
2559 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
2560 of a certain type, for example `cargo build --bins` will build all
2562 - [Added support for haiku][cargo/3952]
2567 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
2568 - [Added rust-windbg script for better debugging on Windows][39983]
2569 - [Rust now uses the official cross compiler for NetBSD][40612]
2570 - [rustdoc now accepts `#` at the start of files][40828]
2571 - [Fixed jemalloc support for musl][41168]
2576 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
2577 always placed after the sign if it exists and before the digits. With the `#`
2578 flag the zeroes are placed after the prefix and before the digits.
2579 - [Due to the struct field optimisation][40377], using `transmute` on structs
2580 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
2581 always been undefined behavior, but is now more likely to break in practice.
2582 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
2583 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
2584 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
2585 - [Overlapping inherent `impl`s are now a hard error][40728]
2586 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
2587 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
2588 `out.asm` and `out.ll` instead of only one of the filetypes.
2589 - [ calling a function that returns `Self` will no longer work][41805] when
2590 the size of `Self` cannot be statically determined.
2591 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
2592 this has caused a few regressions namely:
2594 - Changed the link order of local static/dynamic libraries (respecting the
2595 order on given rather than having the compiler reorder).
2596 - Changed how MinGW is linked, native code linked to dynamic libraries
2597 may require manually linking to the gcc support library (for the native
2600 [38165]: https://github.com/rust-lang/rust/pull/38165
2601 [39799]: https://github.com/rust-lang/rust/pull/39799
2602 [39891]: https://github.com/rust-lang/rust/pull/39891
2603 [39983]: https://github.com/rust-lang/rust/pull/39983
2604 [40043]: https://github.com/rust-lang/rust/pull/40043
2605 [40241]: https://github.com/rust-lang/rust/pull/40241
2606 [40338]: https://github.com/rust-lang/rust/pull/40338
2607 [40367]: https://github.com/rust-lang/rust/pull/40367
2608 [40377]: https://github.com/rust-lang/rust/pull/40377
2609 [40409]: https://github.com/rust-lang/rust/pull/40409
2610 [40516]: https://github.com/rust-lang/rust/pull/40516
2611 [40556]: https://github.com/rust-lang/rust/pull/40556
2612 [40561]: https://github.com/rust-lang/rust/pull/40561
2613 [40589]: https://github.com/rust-lang/rust/pull/40589
2614 [40612]: https://github.com/rust-lang/rust/pull/40612
2615 [40723]: https://github.com/rust-lang/rust/pull/40723
2616 [40728]: https://github.com/rust-lang/rust/pull/40728
2617 [40731]: https://github.com/rust-lang/rust/pull/40731
2618 [40734]: https://github.com/rust-lang/rust/pull/40734
2619 [40805]: https://github.com/rust-lang/rust/pull/40805
2620 [40807]: https://github.com/rust-lang/rust/pull/40807
2621 [40828]: https://github.com/rust-lang/rust/pull/40828
2622 [40870]: https://github.com/rust-lang/rust/pull/40870
2623 [41085]: https://github.com/rust-lang/rust/pull/41085
2624 [41143]: https://github.com/rust-lang/rust/pull/41143
2625 [41168]: https://github.com/rust-lang/rust/pull/41168
2626 [41270]: https://github.com/rust-lang/rust/issues/41270
2627 [41469]: https://github.com/rust-lang/rust/pull/41469
2628 [41805]: https://github.com/rust-lang/rust/issues/41805
2629 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
2630 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
2631 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
2632 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
2633 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
2634 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
2635 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
2636 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
2637 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
2638 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
2639 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
2640 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
2641 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
2642 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
2645 Version 1.17.0 (2017-04-27)
2646 ===========================
2651 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
2652 * [Fields of structs may be initialized without duplicating the field/variable
2653 names][39761]. [RFC 1682]
2654 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
2655 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
2656 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
2657 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
2658 `'b`. Soundness fix.
2659 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
2660 * [Static variables may contain references to other statics][40027]
2665 * [Exit quickly on only `--emit dep-info`][40336]
2666 * [Make `-C relocation-model` more correctly determine whether the linker
2667 creates a position-independent executable][40245]
2668 * [Add `-C overflow-checks` to directly control whether integer overflow
2670 * [The rustc type checker now checks items on demand instead of in a single
2671 in-order pass][40008]. This is mostly an internal refactoring in support of
2672 future work, including incremental type checking, but also resolves [RFC
2673 1647], allowing `Self` to appear in `impl` `where` clauses.
2674 * [Optimize vtable loads][39995]
2675 * [Turn off vectorization for Emscripten targets][39990]
2676 * [Provide suggestions for unknown macros imported with `use`][39953]
2677 * [Fix ICEs in path resolution][39939]
2678 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
2679 * [Add clearer error message using `&str + &str`][39116]
2690 * [`Ordering::then`]
2691 * [`Ordering::then_with`]
2692 * [`BTreeMap::range`]
2693 * [`BTreeMap::range_mut`]
2694 * [`collections::Bound`]
2695 * [`process::abort`]
2696 * [`ptr::read_unaligned`]
2697 * [`ptr::write_unaligned`]
2698 * [`Result::expect_err`]
2701 * [`Cell::into_inner`]
2707 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
2708 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
2709 * [`String` implements `FromIterator<&char>`][40028]
2710 * `Box` [implements][40009] a number of new conversions:
2711 `From<Box<str>> for String`,
2712 `From<Box<[T]>> for Vec<T>`,
2713 `From<Box<CStr>> for CString`,
2714 `From<Box<OsStr>> for OsString`,
2715 `From<Box<Path>> for PathBuf`,
2716 `Into<Box<str>> for String`,
2717 `Into<Box<[T]>> for Vec<T>`,
2718 `Into<Box<CStr>> for CString`,
2719 `Into<Box<OsStr>> for OsString`,
2720 `Into<Box<Path>> for PathBuf`,
2721 `Default for Box<str>`,
2722 `Default for Box<CStr>`,
2723 `Default for Box<OsStr>`,
2724 `From<&CStr> for Box<CStr>`,
2725 `From<&OsStr> for Box<OsStr>`,
2726 `From<&Path> for Box<Path>`
2727 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
2728 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
2729 * [Slightly optimize `slice::sort`][39538]
2730 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
2731 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
2732 `Box<str>` implements `From<&str>`][39438]
2733 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
2734 `From<(I, u16)> where I: Into<IpAddr>`][39372]
2735 * [`format!` estimates the needed capacity before writing a string][39356]
2736 * [Support unprivileged symlink creation in Windows][38921]
2737 * [`PathBuf` implements `Default`][38764]
2738 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
2739 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
2740 and poor hash functions.
2745 * [Add `cargo check --all`][cargo/3731]
2746 * [Add an option to ignore SSL revocation checking][cargo/3699]
2747 * [Add `cargo run --package`][cargo/3691]
2748 * [Add `required_features`][cargo/3667]
2749 * [Assume `build.rs` is a build script][cargo/3664]
2750 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
2755 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
2757 * [The "Unstable Book" documents nightly-only features][ubook]
2758 * [Improve the style of the sidebar in rustdoc output][40265]
2759 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
2760 * [Fix MSP430 breakage due to `i128`][40257]
2761 * [Preliminary Solaris/SPARCv9 support][39903]
2762 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
2763 run without installing the MSVC runtime.
2764 * [`rustdoc --test` includes file names in test names][39788]
2765 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
2766 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
2767 * [Initial support for `aarch64-unknown-freebsd`][39491]
2768 * [Initial support for `i686-unknown-netbsd`][39426]
2769 * [This release no longer includes the old makefile build system][39431]. Rust
2770 is built with a custom build system, written in Rust, and with Cargo.
2771 * [Add Debug implementations for libcollection structs][39002]
2772 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
2773 * [`--test-threads=0` produces an error][38945]
2774 * [`rustup` installs documentation by default][40526]
2775 * [The Rust source includes NatVis visualizations][39843]. These can be used by
2776 WinDbg and Visual Studio to improve the debugging experience.
2781 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
2782 workaround, either use MSVC 2015 or run vcvars.bat.
2783 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
2784 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
2785 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
2787 * [`format!` and `Display::to_string` panic if an underlying formatting
2788 implementation returns an error][40117]. Previously the error was silently
2789 ignored. It is incorrect for `write_fmt` to return an error when writing
2791 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
2792 crates were marked stable and could be accessed from the stable toolchain.
2793 * [Rust git source no longer includes vendored crates][39728]. Those that need
2794 to build with vendored crates should build from release tarballs.
2795 * [Fix inert attributes from `proc_macro_derives`][39572]
2796 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
2797 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
2799 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
2800 existing code generally ignores the type of dead-code unless a type-hint is
2801 provided; this can cause surprising inference interactions particularly around
2802 defaulting. The new code uniformly ignores the result type of dead-code.
2803 * [Tuple-struct constructors with private fields are no longer visible][38932]
2804 * [Lifetime parameters that do not appear in the arguments are now considered
2805 early-bound][38897], resolving a soundness bug (#[32330]). The
2806 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
2808 * [rustdoc: fix doctests with non-feature crate attributes][38161]
2809 * [Make transmuting from fn item types to pointer-sized types a hard
2812 [27787]: https://github.com/rust-lang/rust/issues/27787
2813 [32330]: https://github.com/rust-lang/rust/issues/32330
2814 [34198]: https://github.com/rust-lang/rust/pull/34198
2815 [38161]: https://github.com/rust-lang/rust/pull/38161
2816 [38368]: https://github.com/rust-lang/rust/pull/38368
2817 [38584]: https://github.com/rust-lang/rust/issues/38584
2818 [38661]: https://github.com/rust-lang/rust/pull/38661
2819 [38764]: https://github.com/rust-lang/rust/pull/38764
2820 [38864]: https://github.com/rust-lang/rust/issues/38864
2821 [38897]: https://github.com/rust-lang/rust/pull/38897
2822 [38921]: https://github.com/rust-lang/rust/pull/38921
2823 [38932]: https://github.com/rust-lang/rust/pull/38932
2824 [38945]: https://github.com/rust-lang/rust/pull/38945
2825 [38981]: https://github.com/rust-lang/rust/pull/38981
2826 [39002]: https://github.com/rust-lang/rust/pull/39002
2827 [39116]: https://github.com/rust-lang/rust/pull/39116
2828 [39193]: https://github.com/rust-lang/rust/pull/39193
2829 [39265]: https://github.com/rust-lang/rust/pull/39265
2830 [39356]: https://github.com/rust-lang/rust/pull/39356
2831 [39372]: https://github.com/rust-lang/rust/pull/39372
2832 [39426]: https://github.com/rust-lang/rust/pull/39426
2833 [39431]: https://github.com/rust-lang/rust/pull/39431
2834 [39438]: https://github.com/rust-lang/rust/pull/39438
2835 [39440]: https://github.com/rust-lang/rust/pull/39440
2836 [39485]: https://github.com/rust-lang/rust/pull/39485
2837 [39491]: https://github.com/rust-lang/rust/pull/39491
2838 [39518]: https://github.com/rust-lang/rust/pull/39518
2839 [39538]: https://github.com/rust-lang/rust/pull/39538
2840 [39572]: https://github.com/rust-lang/rust/pull/39572
2841 [39633]: https://github.com/rust-lang/rust/pull/39633
2842 [39642]: https://github.com/rust-lang/rust/pull/39642
2843 [39728]: https://github.com/rust-lang/rust/pull/39728
2844 [39761]: https://github.com/rust-lang/rust/pull/39761
2845 [39788]: https://github.com/rust-lang/rust/pull/39788
2846 [39793]: https://github.com/rust-lang/rust/pull/39793
2847 [39837]: https://github.com/rust-lang/rust/pull/39837
2848 [39843]: https://github.com/rust-lang/rust/pull/39843
2849 [39851]: https://github.com/rust-lang/rust/pull/39851
2850 [39903]: https://github.com/rust-lang/rust/pull/39903
2851 [39939]: https://github.com/rust-lang/rust/pull/39939
2852 [39953]: https://github.com/rust-lang/rust/pull/39953
2853 [39960]: https://github.com/rust-lang/rust/pull/39960
2854 [39990]: https://github.com/rust-lang/rust/pull/39990
2855 [39995]: https://github.com/rust-lang/rust/pull/39995
2856 [40008]: https://github.com/rust-lang/rust/pull/40008
2857 [40009]: https://github.com/rust-lang/rust/pull/40009
2858 [40027]: https://github.com/rust-lang/rust/pull/40027
2859 [40028]: https://github.com/rust-lang/rust/pull/40028
2860 [40037]: https://github.com/rust-lang/rust/pull/40037
2861 [40117]: https://github.com/rust-lang/rust/pull/40117
2862 [40166]: https://github.com/rust-lang/rust/pull/40166
2863 [40245]: https://github.com/rust-lang/rust/pull/40245
2864 [40257]: https://github.com/rust-lang/rust/pull/40257
2865 [40261]: https://github.com/rust-lang/rust/pull/40261
2866 [40265]: https://github.com/rust-lang/rust/pull/40265
2867 [40319]: https://github.com/rust-lang/rust/pull/40319
2868 [40336]: https://github.com/rust-lang/rust/pull/40336
2869 [40526]: https://github.com/rust-lang/rust/pull/40526
2870 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
2871 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
2872 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
2873 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
2874 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
2875 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
2876 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
2877 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
2878 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
2879 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
2880 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
2881 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
2882 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
2883 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
2884 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
2885 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
2886 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
2887 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
2888 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
2889 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
2890 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
2891 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
2892 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
2893 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
2894 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
2895 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
2896 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
2897 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
2898 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
2899 [mdbook]: https://crates.io/crates/mdbook
2900 [ubook]: https://doc.rust-lang.org/unstable-book/
2903 Version 1.16.0 (2017-03-16)
2904 ===========================
2909 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
2910 * [Uninhabitable enums (those without any variants) no longer permit wildcard
2911 match patterns][38069]
2912 * [Clean up semantics of `self` in an import list][38313]
2913 * [`Self` may appear in `impl` headers][38920]
2914 * [`Self` may appear in struct expressions][39282]
2919 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
2920 a `.rmeta` file containing only crate metadata][38571]. This can be
2921 used by tools like the Rust Language Service to perform
2922 metadata-only builds.
2923 * [Levenshtein based typo suggestions now work in most places, while
2924 previously they worked only for fields and sometimes for local
2925 variables][38927]. Together with the overhaul of "no
2926 resolution"/"unexpected resolution" errors (#[38154]) they result in
2927 large and systematic improvement in resolution diagnostics.
2928 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
2930 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
2931 * [`rustc` no longer attempts to provide "consider using an explicit
2932 lifetime" suggestions][37057]. They were inaccurate.
2937 * [`VecDeque::truncate`]
2938 * [`VecDeque::resize`]
2939 * [`String::insert_str`]
2940 * [`Duration::checked_add`]
2941 * [`Duration::checked_sub`]
2942 * [`Duration::checked_div`]
2943 * [`Duration::checked_mul`]
2946 * [`SocketAddr::is_ipv4`]
2947 * [`SocketAddr::is_ipv6`]
2948 * [`IpAddr::is_ipv4`]
2949 * [`IpAddr::is_ipv6`]
2951 * [`Vec::dedup_by_key`]
2952 * [`Result::unwrap_or_default`]
2953 * [`<*const T>::wrapping_offset`]
2954 * [`<*mut T>::wrapping_offset`]
2955 * `CommandExt::creation_flags`
2956 * [`File::set_permissions`]
2957 * [`String::split_off`]
2962 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
2963 their argument by `Borrow` parameter][37761]
2964 * [All public types in std implement `Debug`][38006]
2965 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
2966 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
2967 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
2969 * [std: Fix partial writes in `LineWriter`][38062]
2970 * [std: Clamp max read/write sizes on Unix][38062]
2971 * [Use more specific panic message for `&str` slicing errors][38066]
2972 * [`TcpListener::set_only_v6` is deprecated][38304]. This
2973 functionality cannot be achieved in std currently.
2974 * [`writeln!`, like `println!`, now accepts a form with no string
2975 or formatting arguments, to just print a newline][38469]
2976 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
2977 * [Reduce the size of static data in `std_unicode::tables`][38781]
2978 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
2979 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
2981 * [`Duration` implements `Sum`][38712]
2982 * [`String` implements `ToSocketAddrs`][39048]
2987 * [The `cargo check` command does a type check of a project without
2988 building it][cargo/3296]
2989 * [crates.io will display CI badges from Travis and AppVeyor, if
2990 specified in Cargo.toml][cargo/3546]
2991 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
2992 * [Compilation profiles accept integer values for `debug`, in addition
2993 to `true` and `false`. These are passed to `rustc` as the value to
2994 `-C debuginfo`][cargo/3534]
2995 * [Implement `cargo --version --verbose`][cargo/3604]
2996 * [All builds now output 'dep-info' build dependencies compatible with
2997 make and ninja][cargo/3557]
2998 * [Build all workspace members with `build --all`][cargo/3511]
2999 * [Document all workspace members with `doc --all`][cargo/3515]
3000 * [Path deps outside workspace are not members][cargo/3443]
3005 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
3006 the path to the Rust implementation][38589]
3007 * [The `armv7-linux-androideabi` target no longer enables NEON
3008 extensions, per Google's ABI guide][38413]
3009 * [The stock standard library can be compiled for Redox OS][38401]
3010 * [Rust has initial SPARC support][38726]. Tier 3. No builds
3012 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
3014 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
3019 * [Uninhabitable enums (those without any variants) no longer permit wildcard
3020 match patterns][38069]
3021 * In this release, references to uninhabited types can not be
3022 pattern-matched. This was accidentally allowed in 1.15.
3023 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
3024 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
3026 * [Clean up semantics of `self` in an import list][38313]
3027 * Reimplemented lifetime elision. This change was almost entirely compatible
3028 with existing code, but it did close a number of small bugs and loopholes,
3029 as well as being more accepting in some other [cases][41105].
3031 [37057]: https://github.com/rust-lang/rust/pull/37057
3032 [37761]: https://github.com/rust-lang/rust/pull/37761
3033 [38006]: https://github.com/rust-lang/rust/pull/38006
3034 [38051]: https://github.com/rust-lang/rust/pull/38051
3035 [38062]: https://github.com/rust-lang/rust/pull/38062
3036 [38062]: https://github.com/rust-lang/rust/pull/38622
3037 [38066]: https://github.com/rust-lang/rust/pull/38066
3038 [38069]: https://github.com/rust-lang/rust/pull/38069
3039 [38131]: https://github.com/rust-lang/rust/pull/38131
3040 [38154]: https://github.com/rust-lang/rust/pull/38154
3041 [38274]: https://github.com/rust-lang/rust/pull/38274
3042 [38304]: https://github.com/rust-lang/rust/pull/38304
3043 [38313]: https://github.com/rust-lang/rust/pull/38313
3044 [38314]: https://github.com/rust-lang/rust/pull/38314
3045 [38327]: https://github.com/rust-lang/rust/pull/38327
3046 [38401]: https://github.com/rust-lang/rust/pull/38401
3047 [38413]: https://github.com/rust-lang/rust/pull/38413
3048 [38469]: https://github.com/rust-lang/rust/pull/38469
3049 [38559]: https://github.com/rust-lang/rust/pull/38559
3050 [38571]: https://github.com/rust-lang/rust/pull/38571
3051 [38580]: https://github.com/rust-lang/rust/pull/38580
3052 [38589]: https://github.com/rust-lang/rust/pull/38589
3053 [38670]: https://github.com/rust-lang/rust/pull/38670
3054 [38712]: https://github.com/rust-lang/rust/pull/38712
3055 [38726]: https://github.com/rust-lang/rust/pull/38726
3056 [38781]: https://github.com/rust-lang/rust/pull/38781
3057 [38798]: https://github.com/rust-lang/rust/pull/38798
3058 [38909]: https://github.com/rust-lang/rust/pull/38909
3059 [38920]: https://github.com/rust-lang/rust/pull/38920
3060 [38927]: https://github.com/rust-lang/rust/pull/38927
3061 [39048]: https://github.com/rust-lang/rust/pull/39048
3062 [39282]: https://github.com/rust-lang/rust/pull/39282
3063 [39379]: https://github.com/rust-lang/rust/pull/39379
3064 [41105]: https://github.com/rust-lang/rust/issues/41105
3065 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
3066 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
3067 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
3068 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
3069 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
3070 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
3071 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
3072 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
3073 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
3074 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
3075 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
3076 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
3077 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
3078 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
3079 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
3080 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
3081 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
3082 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
3083 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
3084 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
3085 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
3086 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
3087 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
3088 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
3089 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
3090 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
3091 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
3092 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
3093 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
3094 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
3097 Version 1.15.1 (2017-02-09)
3098 ===========================
3100 * [Fix IntoIter::as_mut_slice's signature][39466]
3101 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
3103 [39466]: https://github.com/rust-lang/rust/pull/39466
3104 [39523]: https://github.com/rust-lang/rust/pull/39523
3107 Version 1.15.0 (2017-02-02)
3108 ===========================
3113 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
3114 stable. This allows popular code-generating crates like Serde and Diesel to
3115 work ergonomically. [RFC 1681].
3116 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
3117 with curly braces][36868]. Part of [RFC 1506].
3118 * [A number of minor changes to name resolution have been activated][37127].
3119 They add up to more consistent semantics, allowing for future evolution of
3120 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
3121 details of what is different. The breaking changes here have been transitioned
3122 through the [`legacy_imports`] lint since 1.14, with no known regressions.
3123 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
3125 * [`?Sized` can be used in `where` clauses][37791]
3126 * [There is now a limit on the size of monomorphized types and it can be
3127 modified with the `#![type_size_limit]` crate attribute, similarly to
3128 the `#![recursion_limit]` attribute][37789]
3133 * [On Windows, the compiler will apply dllimport attributes when linking to
3134 extern functions][37973]. Additional attributes and flags can control which
3135 library kind is linked and its name. [RFC 1717].
3136 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
3137 * [The `--test` flag works with procedural macro crates][38107]
3138 * [Fix `extern "aapcs" fn` ABI][37814]
3139 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
3140 * [The `format!` expander recognizes incorrect `printf` and shell-style
3141 formatting directives and suggests the correct format][37613].
3142 * [Only report one error for all unused imports in an import list][37456]
3144 Compiler Performance
3145 --------------------
3147 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
3148 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
3149 * [Don't clone in `UnificationTable::probe`][37848]
3150 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
3151 * [Use small vectors in type walker][37760]
3152 * [Macro expansion performance was improved][37701]
3153 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
3154 * [Replace FNV with a faster hash function][37229]
3159 * [`std::iter::Iterator::min_by`]
3160 * [`std::iter::Iterator::max_by`]
3161 * [`std::os::*::fs::FileExt`]
3162 * [`std::sync::atomic::Atomic*::get_mut`]
3163 * [`std::sync::atomic::Atomic*::into_inner`]
3164 * [`std::vec::IntoIter::as_slice`]
3165 * [`std::vec::IntoIter::as_mut_slice`]
3166 * [`std::sync::mpsc::Receiver::try_iter`]
3167 * [`std::os::unix::process::CommandExt::before_exec`]
3168 * [`std::rc::Rc::strong_count`]
3169 * [`std::rc::Rc::weak_count`]
3170 * [`std::sync::Arc::strong_count`]
3171 * [`std::sync::Arc::weak_count`]
3172 * [`std::char::encode_utf8`]
3173 * [`std::char::encode_utf16`]
3174 * [`std::cell::Ref::clone`]
3175 * [`std::io::Take::into_inner`]
3180 * [The standard sorting algorithm has been rewritten for dramatic performance
3181 improvements][38192]. It is a hybrid merge sort, drawing influences from
3182 Timsort. Previously it was a naive merge sort.
3183 * [`Iterator::nth` no longer has a `Sized` bound][38134]
3184 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
3186 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
3187 and `char_indices().last()`][37882]
3188 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
3189 * [Chinese characters display correctly in `fmt::Debug`][37855]
3190 * [Derive `Default` for `Duration`][37699]
3191 * [Support creation of anonymous pipes on WinXP/2k][37677]
3192 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
3193 * [Don't pass overlapped handles to processes][38835]
3198 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
3199 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
3200 should instead check the variable at runtime with `std::env`. That the value
3201 was set at build time was a bug, and incorrect when cross-compiling. This
3202 change is known to cause breakage.
3203 * [Add `--all` flag to `cargo test`][cargo/3221]
3204 * [Compile statically against the MSVC CRT][cargo/3363]
3205 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
3206 * [Link OpenSSL statically on OSX][cargo/3311]
3207 * [Apply new fingerprinting to build dir outputs][cargo/3310]
3208 * [Test for bad path overrides with summaries][cargo/3336]
3209 * [Require `cargo install --vers` to take a semver version][cargo/3338]
3210 * [Fix retrying crate downloads for network errors][cargo/3348]
3211 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
3212 * [Emit more info on --message-format=json][cargo/3319]
3213 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
3214 * [Don't ignore errors in workspace manifest][cargo/3409]
3215 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
3220 * [Test runners (binaries built with `--test`) now support a `--list` argument
3221 that lists the tests it contains][38185]
3222 * [Test runners now support a `--exact` argument that makes the test filter
3223 match exactly, instead of matching only a substring of the test name][38181]
3224 * [rustdoc supports a `--playground-url` flag][37763]
3225 * [rustdoc provides more details about `#[should_panic]` errors][37749]
3230 * [The Rust build system is now written in Rust][37817]. The Makefiles may
3231 continue to be used in this release by passing `--disable-rustbuild` to the
3232 configure script, but they will be deleted soon. Note that the new build
3233 system uses a different on-disk layout that will likely affect any scripts
3235 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
3237 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
3238 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
3244 * [A number of minor changes to name resolution have been activated][37127].
3245 They add up to more consistent semantics, allowing for future evolution of
3246 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
3247 details of what is different. The breaking changes here have been transitioned
3248 through the [`legacy_imports`] lint since 1.14, with no known regressions.
3249 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
3250 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
3251 should instead check the variable at runtime with `std::env`. That the value
3252 was set at build time was a bug, and incorrect when cross-compiling. This
3253 change is known to cause breakage.
3254 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
3255 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
3256 1.10 and is now an error by default. It will become a hard error in the near
3258 * [The semantics relating modules to file system directories are changing in
3259 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
3260 lint, which is a warning in this release, and will become a hard error in the
3262 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
3263 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
3264 the underlying iterator][37834]
3266 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
3267 [33685]: https://github.com/rust-lang/rust/issues/33685
3268 [36868]: https://github.com/rust-lang/rust/pull/36868
3269 [37127]: https://github.com/rust-lang/rust/pull/37127
3270 [37229]: https://github.com/rust-lang/rust/pull/37229
3271 [37456]: https://github.com/rust-lang/rust/pull/37456
3272 [37527]: https://github.com/rust-lang/rust/pull/37527
3273 [37602]: https://github.com/rust-lang/rust/pull/37602
3274 [37613]: https://github.com/rust-lang/rust/pull/37613
3275 [37615]: https://github.com/rust-lang/rust/pull/37615
3276 [37636]: https://github.com/rust-lang/rust/pull/37636
3277 [37627]: https://github.com/rust-lang/rust/pull/37627
3278 [37642]: https://github.com/rust-lang/rust/pull/37642
3279 [37677]: https://github.com/rust-lang/rust/pull/37677
3280 [37699]: https://github.com/rust-lang/rust/pull/37699
3281 [37701]: https://github.com/rust-lang/rust/pull/37701
3282 [37705]: https://github.com/rust-lang/rust/pull/37705
3283 [37749]: https://github.com/rust-lang/rust/pull/37749
3284 [37760]: https://github.com/rust-lang/rust/pull/37760
3285 [37763]: https://github.com/rust-lang/rust/pull/37763
3286 [37764]: https://github.com/rust-lang/rust/pull/37764
3287 [37789]: https://github.com/rust-lang/rust/pull/37789
3288 [37791]: https://github.com/rust-lang/rust/pull/37791
3289 [37814]: https://github.com/rust-lang/rust/pull/37814
3290 [37817]: https://github.com/rust-lang/rust/pull/37817
3291 [37834]: https://github.com/rust-lang/rust/pull/37834
3292 [37848]: https://github.com/rust-lang/rust/pull/37848
3293 [37855]: https://github.com/rust-lang/rust/pull/37855
3294 [37882]: https://github.com/rust-lang/rust/pull/37882
3295 [37888]: https://github.com/rust-lang/rust/pull/37888
3296 [37973]: https://github.com/rust-lang/rust/pull/37973
3297 [37979]: https://github.com/rust-lang/rust/pull/37979
3298 [38086]: https://github.com/rust-lang/rust/pull/38086
3299 [38107]: https://github.com/rust-lang/rust/pull/38107
3300 [38117]: https://github.com/rust-lang/rust/pull/38117
3301 [38134]: https://github.com/rust-lang/rust/pull/38134
3302 [38146]: https://github.com/rust-lang/rust/pull/38146
3303 [38181]: https://github.com/rust-lang/rust/pull/38181
3304 [38182]: https://github.com/rust-lang/rust/pull/38182
3305 [38185]: https://github.com/rust-lang/rust/pull/38185
3306 [38192]: https://github.com/rust-lang/rust/pull/38192
3307 [38279]: https://github.com/rust-lang/rust/pull/38279
3308 [38835]: https://github.com/rust-lang/rust/pull/38835
3309 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
3310 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
3311 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
3312 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
3313 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
3314 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
3315 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
3316 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
3317 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
3318 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
3319 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
3320 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
3321 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
3322 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
3323 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
3324 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
3325 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
3326 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
3327 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
3328 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
3329 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
3330 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
3331 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
3332 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
3333 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
3334 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
3335 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
3336 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
3337 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
3338 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
3339 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
3340 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
3341 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
3342 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
3343 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
3344 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
3345 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
3346 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
3349 Version 1.14.0 (2016-12-22)
3350 ===========================
3355 * [`..` matches multiple tuple fields in enum variants, structs
3356 and tuples][36843]. [RFC 1492].
3357 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
3358 * [`use *` and `use ::*` both glob-import from the crate root][37367]
3359 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
3360 dereferencing][36822]
3365 * [Mark enums with non-zero discriminant as non-zero][37224]
3366 * [Lower-case `static mut` names are linted like other
3367 statics and consts][37162]
3368 * [Fix ICE on some macros in const integer positions
3369 (e.g. `[u8; m!()]`)][36819]
3370 * [Improve error message and snippet for "did you mean `x`"][36798]
3371 * [Add a panic-strategy field to the target specification][36794]
3372 * [Include LLVM version in `--version --verbose`][37200]
3374 Compile-time Optimizations
3375 --------------------------
3377 * [Improve macro expansion performance][37569]
3378 * [Shrink `Expr_::ExprInlineAsm`][37445]
3379 * [Replace all uses of SHA-256 with BLAKE2b][37439]
3380 * [Reduce the number of bytes hashed by `IchHasher`][37427]
3381 * [Avoid more allocations when compiling html5ever][37373]
3382 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
3383 * [Avoid some allocations in the macro parser][37318]
3384 * [Use a faster deflate setting][37298]
3385 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
3386 during interning of slices][37270]
3387 * [Optimize `write_metadata`][37267]
3388 * [Don't process obligation forest cycles when stalled][37231]
3389 * [Avoid many `CrateConfig` clones][37161]
3390 * [Optimize `Substs::super_fold_with`][37108]
3391 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
3392 * [Speed up `plug_leaks`][36917]
3397 * [`println!()`, with no arguments, prints newline][36825].
3398 Previously, an empty string was required to achieve the same.
3399 * [`Wrapping` impls standard binary and unary operators, as well as
3400 the `Sum` and `Product` iterators][37356]
3401 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
3403 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
3404 `VecDeque` iterators][37315]
3405 * [Improve `SipHasher` performance on small values][37312]
3406 * [Add Iterator trait TrustedLen to enable better FromIterator /
3408 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
3409 * [`ReadDir` implements `Debug`][37221]
3410 * [Implement `RefUnwindSafe` for atomic types][37178]
3411 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
3412 * [Avoid allocations in `Decoder::read_str`][37064]
3413 * [`io::Error` implements `From<io::ErrorKind>`][37037]
3414 * [Impl `Debug` for raw pointers to unsized data][36880]
3415 * [Don't reuse `HashMap` random seeds][37470]
3416 * [The internal memory layout of `HashMap` is more cache-friendly, for
3417 significant improvements in some operations][36692]
3418 * [`HashMap` uses less memory on 32-bit architectures][36595]
3419 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
3424 * [Expose rustc cfg values to build scripts][cargo/3243]
3425 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
3426 * [Fix passing --features when testing multiple packages][cargo/3280]
3427 * [Use a single profile set per workspace][cargo/3249]
3428 * [Load `replace` sections from lock files][cargo/3220]
3429 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
3434 * [rustup is the recommended Rust installation method][1.14rustup]
3435 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
3436 S390x. These are [tier 2] platforms and may have major defects. Follow the
3437 instructions on the website to install, or add the targets to an existing
3438 installation with `rustup target add`. The new target triples are:
3439 - `mips-unknown-linux-gnu`
3440 - `mipsel-unknown-linux-gnu`
3441 - `mips64-unknown-linux-gnuabi64`
3442 - `mips64el-unknown-linux-gnuabi64 `
3443 - `powerpc-unknown-linux-gnu`
3444 - `powerpc64-unknown-linux-gnu`
3445 - `powerpc64le-unknown-linux-gnu`
3446 - `s390x-unknown-linux-gnu `
3447 * This release includes target (std) builds for ARM Linux running MUSL
3448 libc. These are [tier 2] platforms and may have major defects. Add the
3449 following triples to an existing rustup installation with `rustup target add`:
3450 - `arm-unknown-linux-musleabi`
3451 - `arm-unknown-linux-musleabihf`
3452 - `armv7-unknown-linux-musleabihf`
3453 * This release includes [experimental support for WebAssembly][1.14wasm], via
3454 the `wasm32-unknown-emscripten` target. This target is known to have major
3455 defects. Please test, report, and fix.
3456 * rustup no longer installs documentation by default. Run `rustup
3457 component add rust-docs` to install.
3458 * [Fix line stepping in debugger][37310]
3459 * [Enable line number debuginfo in releases][37280]
3464 * [Disable jemalloc on aarch64/powerpc/mips][37392]
3465 * [Add support for Fuchsia OS][37313]
3466 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
3471 * [A number of forward-compatibility lints used by the compiler
3472 to gradually introduce language changes have been converted
3473 to deny by default][36894]:
3474 - ["use of inaccessible extern crate erroneously allowed"][36886]
3475 - ["type parameter default erroneously allowed in invalid location"][36887]
3476 - ["detects super or self keywords at the beginning of global path"][36888]
3477 - ["two overlapping inherent impls define an item with the same name
3478 were erroneously allowed"][36889]
3479 - ["floating-point constants cannot be used in patterns"][36890]
3480 - ["constants of struct or enum type can only be used in a pattern if
3481 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
3482 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
3483 * [Prohibit patterns in trait methods without bodies][37378]
3484 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
3485 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
3486 * [The `$crate` macro variable is accepted in fewer locations][37213]
3487 * [Impls specifying extra region requirements beyond the trait
3488 they implement are rejected][37167]
3489 * [Enums may not be unsized][37111]. Unsized enums are intended to
3490 work but never have. For now they are forbidden.
3491 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
3493 [tier 2]: https://forge.rust-lang.org/platform-support.html
3494 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
3495 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
3496 [36430]: https://github.com/rust-lang/rust/pull/36430
3497 [36595]: https://github.com/rust-lang/rust/pull/36595
3498 [36595]: https://github.com/rust-lang/rust/pull/36595
3499 [36692]: https://github.com/rust-lang/rust/pull/36692
3500 [36767]: https://github.com/rust-lang/rust/pull/36767
3501 [36794]: https://github.com/rust-lang/rust/pull/36794
3502 [36798]: https://github.com/rust-lang/rust/pull/36798
3503 [36819]: https://github.com/rust-lang/rust/pull/36819
3504 [36822]: https://github.com/rust-lang/rust/pull/36822
3505 [36825]: https://github.com/rust-lang/rust/pull/36825
3506 [36843]: https://github.com/rust-lang/rust/pull/36843
3507 [36880]: https://github.com/rust-lang/rust/pull/36880
3508 [36886]: https://github.com/rust-lang/rust/issues/36886
3509 [36887]: https://github.com/rust-lang/rust/issues/36887
3510 [36888]: https://github.com/rust-lang/rust/issues/36888
3511 [36889]: https://github.com/rust-lang/rust/issues/36889
3512 [36890]: https://github.com/rust-lang/rust/issues/36890
3513 [36891]: https://github.com/rust-lang/rust/issues/36891
3514 [36892]: https://github.com/rust-lang/rust/issues/36892
3515 [36894]: https://github.com/rust-lang/rust/pull/36894
3516 [36917]: https://github.com/rust-lang/rust/pull/36917
3517 [36993]: https://github.com/rust-lang/rust/pull/36993
3518 [37037]: https://github.com/rust-lang/rust/pull/37037
3519 [37064]: https://github.com/rust-lang/rust/pull/37064
3520 [37094]: https://github.com/rust-lang/rust/pull/37094
3521 [37108]: https://github.com/rust-lang/rust/pull/37108
3522 [37111]: https://github.com/rust-lang/rust/pull/37111
3523 [37161]: https://github.com/rust-lang/rust/pull/37161
3524 [37162]: https://github.com/rust-lang/rust/pull/37162
3525 [37167]: https://github.com/rust-lang/rust/pull/37167
3526 [37178]: https://github.com/rust-lang/rust/pull/37178
3527 [37200]: https://github.com/rust-lang/rust/pull/37200
3528 [37213]: https://github.com/rust-lang/rust/pull/37213
3529 [37221]: https://github.com/rust-lang/rust/pull/37221
3530 [37224]: https://github.com/rust-lang/rust/pull/37224
3531 [37230]: https://github.com/rust-lang/rust/pull/37230
3532 [37231]: https://github.com/rust-lang/rust/pull/37231
3533 [37247]: https://github.com/rust-lang/rust/pull/37247
3534 [37267]: https://github.com/rust-lang/rust/pull/37267
3535 [37270]: https://github.com/rust-lang/rust/pull/37270
3536 [37273]: https://github.com/rust-lang/rust/pull/37273
3537 [37280]: https://github.com/rust-lang/rust/pull/37280
3538 [37298]: https://github.com/rust-lang/rust/pull/37298
3539 [37306]: https://github.com/rust-lang/rust/pull/37306
3540 [37310]: https://github.com/rust-lang/rust/pull/37310
3541 [37312]: https://github.com/rust-lang/rust/pull/37312
3542 [37313]: https://github.com/rust-lang/rust/pull/37313
3543 [37315]: https://github.com/rust-lang/rust/pull/37315
3544 [37318]: https://github.com/rust-lang/rust/pull/37318
3545 [37322]: https://github.com/rust-lang/rust/pull/37322
3546 [37326]: https://github.com/rust-lang/rust/pull/37326
3547 [37351]: https://github.com/rust-lang/rust/pull/37351
3548 [37356]: https://github.com/rust-lang/rust/pull/37356
3549 [37367]: https://github.com/rust-lang/rust/pull/37367
3550 [37373]: https://github.com/rust-lang/rust/pull/37373
3551 [37378]: https://github.com/rust-lang/rust/pull/37378
3552 [37389]: https://github.com/rust-lang/rust/pull/37389
3553 [37392]: https://github.com/rust-lang/rust/pull/37392
3554 [37427]: https://github.com/rust-lang/rust/pull/37427
3555 [37439]: https://github.com/rust-lang/rust/pull/37439
3556 [37445]: https://github.com/rust-lang/rust/pull/37445
3557 [37470]: https://github.com/rust-lang/rust/pull/37470
3558 [37569]: https://github.com/rust-lang/rust/pull/37569
3559 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
3560 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
3561 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
3562 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
3563 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
3564 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
3565 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
3568 Version 1.13.0 (2016-11-10)
3569 ===========================
3574 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
3575 errors, like the `try!` macro, described in [RFC 0243].
3576 * [Stabilize macros in type position][36014]. Described in [RFC 873].
3577 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
3578 * [Fix `#[derive]` for empty tuple structs/variants][35728]
3579 * [Fix lifetime rules for 'if' conditions][36029]
3580 * [Avoid loading and parsing unconfigured non-inline modules][36482]
3585 * [Add the `-C link-arg` argument][36574]
3586 * [Remove the old AST-based backend from rustc_trans][35764]
3587 * [Don't enable NEON by default on armv7 Linux][35814]
3588 * [Fix debug line number info for macro expansions][35238]
3589 * [Do not emit "class method" debuginfo for types that are not
3590 DICompositeType][36008]
3591 * [Warn about multiple conflicting #[repr] hints][34623]
3592 * [When sizing DST, don't double-count nested struct prefixes][36351]
3593 * [Default RUST_MIN_STACK to 16MiB for now][36505]
3594 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
3595 * [Reject macros with empty repetitions to avoid infinite loop][36721]
3596 * [Expand macros without recursing to avoid stack overflows][36214]
3601 * [Replace macro backtraces with labeled local uses][35702]
3602 * [Improve error message for misplaced doc comments][33922]
3603 * [Buffer unix and lock windows to prevent message interleaving][35975]
3604 * [Update lifetime errors to specifically note temporaries][36171]
3605 * [Special case a few colors for Windows][36178]
3606 * [Suggest `use self` when such an import resolves][36289]
3607 * [Be more specific when type parameter shadows primitive type][36338]
3608 * Many minor improvements
3610 Compile-time Optimizations
3611 --------------------------
3613 * [Compute and cache HIR hashes at beginning][35854]
3614 * [Don't hash types in loan paths][36004]
3615 * [Cache projections in trans][35761]
3616 * [Optimize the parser's last token handling][36527]
3617 * [Only instantiate #[inline] functions in codegen units referencing
3618 them][36524]. This leads to big improvements in cases where crates export
3619 define many inline functions without using them directly.
3620 * [Lazily allocate TypedArena's first chunk][36592]
3621 * [Don't allocate during default HashSet creation][36734]
3628 * [`overflowing_abs`]
3629 * [`RefCell::try_borrow`]
3630 * [`RefCell::try_borrow_mut`]
3635 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
3636 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
3638 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
3639 * [Implement `Debug` for `std::vec::IntoIter`][35707]
3640 * [`CString`: avoid excessive growth just to 0-terminate][35871]
3641 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
3642 * [Use arc4rand on FreeBSD][35884]
3643 * [memrchr: Correct aligned offset computation][35969]
3644 * [Improve Demangling of Rust Symbols][36059]
3645 * [Use monotonic time in condition variables][35048]
3646 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
3647 * [Implement conversion traits for `char`][35755]
3648 * [Fix illegal instruction caused by overflow in channel cloning][36104]
3649 * [Zero first byte of CString on drop][36264]
3650 * [Inherit overflow checks for sum and product][36372]
3651 * [Add missing Eq implementations][36423]
3652 * [Implement `Debug` for `DirEntry`][36631]
3653 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
3655 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
3656 * [Implement more traits for `std::io::ErrorKind`][35911]
3657 * [Optimize BinaryHeap bounds checking][36072]
3658 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
3659 `extend_with_element`][36355]
3660 * [Fix overflow checking in unsigned pow()][34942]
3665 * This release includes security fixes to both curl and OpenSSL.
3666 * [Fix transitive doctests when panic=abort][cargo/3021]
3667 * [Add --all-features flag to cargo][cargo/3038]
3668 * [Reject path-based dependencies in `cargo package`][cargo/3060]
3669 * [Don't parse the home directory more than once][cargo/3078]
3670 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
3671 * [Update OpenSSL to 1.0.2j][cargo/3121]
3672 * [Add license and license_file to cargo metadata output][cargo/3110]
3673 * [Make crates-io registry URL optional in config; ignore all changes to
3674 source.crates-io][cargo/3089]
3675 * [Don't download dependencies from other platforms][cargo/3123]
3676 * [Build transitive dev-dependencies when needed][cargo/3125]
3677 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
3678 * [Avoid updating registry when adding existing deps][cargo/3144]
3679 * [Warn about path overrides that won't work][cargo/3136]
3680 * [Use workspaces during `cargo install`][cargo/3146]
3681 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
3682 * [Add --message-format flag][cargo/3000]
3683 * [Pass target environment for rustdoc][cargo/3205]
3684 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
3685 * [Update curl and curl-sys][cargo/3241]
3686 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
3691 * [rustdoc: Add the `--sysroot` argument][36586]
3692 * [rustdoc: Fix a couple of issues with the search results][35655]
3693 * [rustdoc: remove the `!` from macro URLs and titles][35234]
3694 * [gdb: Fix pretty-printing special-cased Rust types][35585]
3695 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
3700 * [Remove unmaintained style guide][35124]
3701 * [Add s390x support][36369]
3702 * [Initial work at Haiku OS support][36727]
3703 * [Add mips-uclibc targets][35734]
3704 * [Crate-ify compiler-rt into compiler-builtins][35021]
3705 * [Add rustc version info (git hash + date) to dist tarball][36213]
3706 * Many documentation improvements
3711 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
3712 * [Deny (by default) transmuting from fn item types to pointer-sized
3713 types][34923]. Continuing the long transition to zero-sized fn items,
3715 * [Fix `#[derive]` for empty tuple structs/variants][35728].
3717 * [Issue deprecation warnings for safe accesses to extern statics][36173]
3718 * [Fix lifetime rules for 'if' conditions][36029].
3719 * [Inherit overflow checks for sum and product][36372].
3720 * [Forbid user-defined macros named "macro_rules"][36730].
3722 [33922]: https://github.com/rust-lang/rust/pull/33922
3723 [34623]: https://github.com/rust-lang/rust/pull/34623
3724 [34923]: https://github.com/rust-lang/rust/pull/34923
3725 [34942]: https://github.com/rust-lang/rust/pull/34942
3726 [34982]: https://github.com/rust-lang/rust/pull/34982
3727 [35021]: https://github.com/rust-lang/rust/pull/35021
3728 [35048]: https://github.com/rust-lang/rust/pull/35048
3729 [35074]: https://github.com/rust-lang/rust/pull/35074
3730 [35124]: https://github.com/rust-lang/rust/pull/35124
3731 [35234]: https://github.com/rust-lang/rust/pull/35234
3732 [35238]: https://github.com/rust-lang/rust/pull/35238
3733 [35354]: https://github.com/rust-lang/rust/pull/35354
3734 [35559]: https://github.com/rust-lang/rust/pull/35559
3735 [35585]: https://github.com/rust-lang/rust/pull/35585
3736 [35627]: https://github.com/rust-lang/rust/pull/35627
3737 [35655]: https://github.com/rust-lang/rust/pull/35655
3738 [35702]: https://github.com/rust-lang/rust/pull/35702
3739 [35707]: https://github.com/rust-lang/rust/pull/35707
3740 [35728]: https://github.com/rust-lang/rust/pull/35728
3741 [35734]: https://github.com/rust-lang/rust/pull/35734
3742 [35755]: https://github.com/rust-lang/rust/pull/35755
3743 [35761]: https://github.com/rust-lang/rust/pull/35761
3744 [35764]: https://github.com/rust-lang/rust/pull/35764
3745 [35814]: https://github.com/rust-lang/rust/pull/35814
3746 [35854]: https://github.com/rust-lang/rust/pull/35854
3747 [35871]: https://github.com/rust-lang/rust/pull/35871
3748 [35884]: https://github.com/rust-lang/rust/pull/35884
3749 [35911]: https://github.com/rust-lang/rust/pull/35911
3750 [35969]: https://github.com/rust-lang/rust/pull/35969
3751 [35975]: https://github.com/rust-lang/rust/pull/35975
3752 [36004]: https://github.com/rust-lang/rust/pull/36004
3753 [36008]: https://github.com/rust-lang/rust/pull/36008
3754 [36014]: https://github.com/rust-lang/rust/pull/36014
3755 [36029]: https://github.com/rust-lang/rust/pull/36029
3756 [36059]: https://github.com/rust-lang/rust/pull/36059
3757 [36072]: https://github.com/rust-lang/rust/pull/36072
3758 [36101]: https://github.com/rust-lang/rust/pull/36101
3759 [36104]: https://github.com/rust-lang/rust/pull/36104
3760 [36171]: https://github.com/rust-lang/rust/pull/36171
3761 [36173]: https://github.com/rust-lang/rust/pull/36173
3762 [36178]: https://github.com/rust-lang/rust/pull/36178
3763 [36213]: https://github.com/rust-lang/rust/pull/36213
3764 [36214]: https://github.com/rust-lang/rust/pull/36214
3765 [36264]: https://github.com/rust-lang/rust/pull/36264
3766 [36266]: https://github.com/rust-lang/rust/pull/36266
3767 [36289]: https://github.com/rust-lang/rust/pull/36289
3768 [36338]: https://github.com/rust-lang/rust/pull/36338
3769 [36351]: https://github.com/rust-lang/rust/pull/36351
3770 [36355]: https://github.com/rust-lang/rust/pull/36355
3771 [36369]: https://github.com/rust-lang/rust/pull/36369
3772 [36372]: https://github.com/rust-lang/rust/pull/36372
3773 [36423]: https://github.com/rust-lang/rust/pull/36423
3774 [36482]: https://github.com/rust-lang/rust/pull/36482
3775 [36505]: https://github.com/rust-lang/rust/pull/36505
3776 [36524]: https://github.com/rust-lang/rust/pull/36524
3777 [36527]: https://github.com/rust-lang/rust/pull/36527
3778 [36551]: https://github.com/rust-lang/rust/pull/36551
3779 [36574]: https://github.com/rust-lang/rust/pull/36574
3780 [36586]: https://github.com/rust-lang/rust/pull/36586
3781 [36592]: https://github.com/rust-lang/rust/pull/36592
3782 [36631]: https://github.com/rust-lang/rust/pull/36631
3783 [36639]: https://github.com/rust-lang/rust/pull/36639
3784 [36721]: https://github.com/rust-lang/rust/pull/36721
3785 [36727]: https://github.com/rust-lang/rust/pull/36727
3786 [36730]: https://github.com/rust-lang/rust/pull/36730
3787 [36734]: https://github.com/rust-lang/rust/pull/36734
3788 [36754]: https://github.com/rust-lang/rust/pull/36754
3789 [36995]: https://github.com/rust-lang/rust/pull/36995
3790 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
3791 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
3792 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
3793 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
3794 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
3795 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
3796 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
3797 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
3798 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
3799 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
3800 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
3801 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
3802 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
3803 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
3804 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
3805 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
3806 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
3807 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
3808 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
3809 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
3810 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
3811 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
3812 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
3813 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
3814 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
3815 [rustup]: https://www.rustup.rs
3816 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
3817 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
3818 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
3819 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
3820 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
3821 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
3822 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
3825 Version 1.12.1 (2016-10-20)
3826 ===========================
3831 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
3832 * [Confusion with double negation and booleans][36856]
3833 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
3834 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
3835 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
3836 * [Corrupted memory after updated to 1.12][36936]
3837 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
3838 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
3839 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
3841 [36381]: https://github.com/rust-lang/rust/issues/36381
3842 [36856]: https://github.com/rust-lang/rust/issues/36856
3843 [36875]: https://github.com/rust-lang/rust/issues/36875
3844 [36924]: https://github.com/rust-lang/rust/issues/36924
3845 [36926]: https://github.com/rust-lang/rust/issues/36926
3846 [36936]: https://github.com/rust-lang/rust/issues/36936
3847 [37026]: https://github.com/rust-lang/rust/issues/37026
3848 [37112]: https://github.com/rust-lang/rust/issues/37112
3849 [37153]: https://github.com/rust-lang/rust/issues/37153
3852 Version 1.12.0 (2016-09-29)
3853 ===========================
3858 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
3859 This translation pass is far simpler than the previous AST->LLVM pass, and
3860 creates opportunities to perform new optimizations directly on the MIR. It
3861 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
3862 * [`rustc` presents a new, more readable error format, along with
3863 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
3864 Most common editors supporting Rust have been updated to work with it. It was
3865 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
3870 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
3871 This translation pass is far simpler than the previous AST->LLVM pass, and
3872 creates opportunities to perform new optimizations directly on the MIR. It
3873 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
3874 * [Print the Rust target name, not the LLVM target name, with
3875 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
3876 * [The computation of `TypeId` is correct in some cases where it was previously
3877 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
3878 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
3879 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
3880 `--print relocation-models`, and `--print code-models` print the available
3881 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
3882 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
3883 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
3884 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
3885 These targets produce statically-linked binaries. There are no binary release
3891 * [`rustc` presents a new, more readable error format, along with
3892 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
3893 Most common editors supporting Rust have been updated to work with it. It was
3894 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
3895 * [In error descriptions, references are now described in plain English,
3896 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
3897 * [In error type descriptions, unknown numeric types are named `{integer}` or
3898 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
3899 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
3904 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
3905 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
3906 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
3907 useful](https://github.com/rust-lang/rust/pull/34908)
3908 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
3909 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
3910 * [Semicolons are properly required as statement delimiters inside
3911 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
3912 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
3917 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
3918 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
3919 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
3920 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
3921 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
3922 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
3923 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
3924 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
3925 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
3926 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
3927 Both on Unix and Windows.
3928 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
3929 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
3930 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
3931 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
3932 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
3933 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
3934 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
3935 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
3940 * [The `format!` macro and friends now allow a single argument to be formatted
3941 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
3942 * [The lifetime bounds on `[T]::binary_search_by` and
3943 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
3944 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
3945 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
3946 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
3947 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
3948 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
3949 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
3950 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
3951 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
3952 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
3953 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
3954 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
3955 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
3956 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
3957 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
3958 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
3959 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
3960 * [`mpsc::sync_channel` `Receiver`s return any available message before
3961 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
3962 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
3963 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
3968 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
3969 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
3970 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
3971 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
3972 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
3973 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
3974 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
3975 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
3976 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
3977 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
3978 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
3979 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
3980 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
3981 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
3982 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
3983 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
3988 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
3989 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
3994 * [Test binaries now support a `--test-threads` argument to specify the number
3995 of threads used to run tests, and which acts the same as the
3996 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
3997 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
3998 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
3999 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
4000 * [Rust releases now come with source packages that can be installed by rustup
4001 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
4002 The resulting source code can be used by tools and IDES, located in the
4003 sysroot under `lib/rustlib/src`.
4008 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
4009 * Many minor improvements to the documentation.
4010 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
4015 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
4016 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
4017 * [When formatting strings, if "precision" is specified, the "fill",
4018 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
4019 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
4022 Version 1.11.0 (2016-08-18)
4023 ===========================
4028 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
4029 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
4030 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
4031 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
4032 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
4037 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
4038 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
4039 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
4040 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
4041 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
4042 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
4043 (in libcore - previously stabilized in libstd)
4044 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
4045 (in libcore - previously stabilized in libstd)
4046 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
4047 (in libcore - previously stabilized in libstd)
4048 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
4049 (in libcore - previously stabilized in libstd)
4050 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
4051 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
4052 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
4053 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
4058 * [The `thread_local!` macro supports multiple definitions in a single
4059 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
4060 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
4061 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
4062 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
4063 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
4064 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
4065 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
4066 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
4071 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
4072 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
4073 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
4074 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
4075 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
4076 and `-vv` prints warnings for all crates.
4077 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
4078 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
4079 This provides room for expansion by arbitrary tools.
4080 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
4081 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
4082 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
4083 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
4084 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
4085 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
4086 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
4091 * [Caching projections speeds up type check dramatically for some
4092 workloads](https://github.com/rust-lang/rust/pull/33816)
4093 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
4094 This hasher is faster, but is believed to provide sufficient
4095 protection from collision attacks.
4096 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
4101 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
4102 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
4103 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
4104 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
4105 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
4110 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
4111 * [When emitting debug info, rustc emits frame pointers for closures,
4112 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
4113 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
4114 * Many more errors have been given error codes and extended
4116 * API documentation continues to be improved, with many new examples
4121 * [rustc no longer hangs when dependencies recursively re-export
4122 submodules](https://github.com/rust-lang/rust/pull/34542)
4123 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
4124 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
4125 rewritten](https://github.com/rust-lang/rust/pull/33895)
4126 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
4127 No targets use this yet, but it works toward AVR support.
4132 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
4133 * [The new follow-set rules that place restrictions on `macro_rules!`
4134 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
4135 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
4136 and has been a warning since 1.10.
4137 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
4138 This causes breakage in some corner cases.
4141 Version 1.10.0 (2016-07-07)
4142 ===========================
4147 * [Allow `concat_idents!` in type positions as well as in expression
4148 positions](https://github.com/rust-lang/rust/pull/33735).
4149 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
4150 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
4151 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
4152 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
4153 * [`panic!` can be converted to a runtime abort with the
4154 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
4155 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
4156 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
4157 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
4158 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-cdylib.md).
4159 Note that Cargo does not yet directly support cdylibs.
4164 * `os::windows::fs::OpenOptionsExt::access_mode`
4165 * `os::windows::fs::OpenOptionsExt::share_mode`
4166 * `os::windows::fs::OpenOptionsExt::custom_flags`
4167 * `os::windows::fs::OpenOptionsExt::attributes`
4168 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
4169 * `os::unix::fs::OpenOptionsExt::custom_flags`
4170 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
4171 * `Default for sync::Weak`
4172 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
4173 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
4174 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
4175 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
4176 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
4177 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
4178 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
4179 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
4180 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
4181 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
4182 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
4183 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
4184 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
4185 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
4186 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
4187 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
4188 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
4189 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
4190 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
4191 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
4192 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
4193 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
4194 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
4195 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
4196 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
4197 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
4198 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
4199 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
4200 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
4201 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
4202 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
4203 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
4204 * Read/Write/RawFd impls for `UnixStream`
4205 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
4206 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
4207 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
4208 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
4209 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
4210 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
4211 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
4212 * RawFd impls for `UnixListener`
4213 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
4214 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
4215 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
4216 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
4217 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
4218 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
4219 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
4220 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
4221 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
4222 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
4223 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
4224 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
4225 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
4226 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
4227 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
4228 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
4229 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
4230 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
4231 * RawFd impls for `UnixDatagram`
4232 * `{BTree,Hash}Map::values_mut`
4233 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/std/primitive.slice.html#method.binary_search_by_key)
4238 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
4239 The semantics of this minor method are subtle and probably not what
4241 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
4242 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
4243 will fall back to `/dev/urandom` temporarily to avoid blocking
4244 during early boot](https://github.com/rust-lang/rust/pull/33086).
4245 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
4246 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
4247 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
4248 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
4249 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
4250 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
4251 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
4255 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
4256 This controls the runtime behavior of the `panic!` macro
4257 and can be either "unwind" (the default), or "abort".
4258 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
4259 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
4260 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
4261 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
4262 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
4263 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
4264 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
4265 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
4266 By default they are retried twice, which can be customized with the
4267 `net.retry` value in `.cargo/config`.
4268 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
4269 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
4270 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
4271 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
4272 Makes it possible to install multiple crates in parallel.
4273 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
4274 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
4275 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
4276 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
4277 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
4278 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
4283 * [rustc memory usage was reduced by refactoring the context used for
4284 type checking](https://github.com/rust-lang/rust/pull/33425).
4285 * [Speed up creation of `HashMap`s by caching the random keys used
4286 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
4287 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
4288 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
4289 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
4290 10x faster than the previous lookup tables.
4291 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
4296 * Many incremental improvements to documentation and rustdoc.
4297 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
4298 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
4299 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
4300 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
4301 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
4302 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
4303 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
4308 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
4309 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
4310 * [`std` no longer prints backtraces on platforms where the running
4311 module must be loaded with `env::current_exe`, which can't be relied
4312 on](https://github.com/rust-lang/rust/pull/33554).
4313 * This release includes std binaries for the i586-unknown-linux-gnu,
4314 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
4315 i586 target is for old x86 hardware without SSE2, and the armv7
4316 target is for Android running on modern ARM architectures.
4317 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
4318 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
4319 * [On Unix the runtime aborts by calling `libc::abort` instead of
4320 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
4321 * [Rust is now bootstrapped from the previous release of Rust,
4322 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
4327 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
4328 * [`target_env` for Linux ARM targets is just `gnu`, not
4329 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
4330 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
4331 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
4332 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
4333 Affects how macros are parsed.
4334 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
4335 * [Feature-gated attributes on macro-generated macro invocations are
4336 now rejected](https://github.com/rust-lang/rust/pull/32791).
4337 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
4338 This caused some minor changes to type inference.
4341 Version 1.9.0 (2016-05-26)
4342 ==========================
4347 * The `#[deprecated]` attribute when applied to an API will generate
4348 warnings when used. The warnings may be suppressed with
4349 `#[allow(deprecated)]`. [RFC 1270].
4350 * [`fn` item types are zero sized, and each `fn` names a unique
4351 type][1.9fn]. This will break code that transmutes `fn`s, so calling
4352 `transmute` on a `fn` type will generate a warning for a few cycles,
4353 then will be converted to an error.
4354 * [Field and method resolution understand visibility, so private
4355 fields and methods cannot prevent the proper use of public fields
4356 and methods][1.9fv].
4357 * [The parser considers unicode codepoints in the
4358 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
4364 * [`std::panic::catch_unwind`][] (renamed from `recover`)
4365 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
4366 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
4367 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
4368 * [`str::is_char_boundary`]
4369 * [`<*const T>::as_ref`]
4370 * [`<*mut T>::as_ref`]
4371 * [`<*mut T>::as_mut`]
4372 * [`AsciiExt::make_ascii_uppercase`]
4373 * [`AsciiExt::make_ascii_lowercase`]
4374 * [`char::decode_utf16`]
4375 * [`char::DecodeUtf16`]
4376 * [`char::DecodeUtf16Error`]
4377 * [`char::DecodeUtf16Error::unpaired_surrogate`]
4378 * [`BTreeSet::take`]
4379 * [`BTreeSet::replace`]
4382 * [`HashSet::replace`]
4384 * [`OsString::with_capacity`]
4385 * [`OsString::clear`]
4386 * [`OsString::capacity`]
4387 * [`OsString::reserve`]
4388 * [`OsString::reserve_exact`]
4389 * [`OsStr::is_empty`]
4391 * [`std::os::unix::thread`]
4394 * [`JoinHandleExt::as_pthread_t`]
4395 * [`JoinHandleExt::into_pthread_t`]
4396 * [`HashSet::hasher`]
4397 * [`HashMap::hasher`]
4398 * [`CommandExt::exec`]
4399 * [`File::try_clone`]
4400 * [`SocketAddr::set_ip`]
4401 * [`SocketAddr::set_port`]
4402 * [`SocketAddrV4::set_ip`]
4403 * [`SocketAddrV4::set_port`]
4404 * [`SocketAddrV6::set_ip`]
4405 * [`SocketAddrV6::set_port`]
4406 * [`SocketAddrV6::set_flowinfo`]
4407 * [`SocketAddrV6::set_scope_id`]
4408 * [`slice::copy_from_slice`]
4409 * [`ptr::read_volatile`]
4410 * [`ptr::write_volatile`]
4411 * [`OpenOptions::create_new`]
4412 * [`TcpStream::set_nodelay`]
4413 * [`TcpStream::nodelay`]
4414 * [`TcpStream::set_ttl`]
4415 * [`TcpStream::ttl`]
4416 * [`TcpStream::set_only_v6`]
4417 * [`TcpStream::only_v6`]
4418 * [`TcpStream::take_error`]
4419 * [`TcpStream::set_nonblocking`]
4420 * [`TcpListener::set_ttl`]
4421 * [`TcpListener::ttl`]
4422 * [`TcpListener::set_only_v6`]
4423 * [`TcpListener::only_v6`]
4424 * [`TcpListener::take_error`]
4425 * [`TcpListener::set_nonblocking`]
4426 * [`UdpSocket::set_broadcast`]
4427 * [`UdpSocket::broadcast`]
4428 * [`UdpSocket::set_multicast_loop_v4`]
4429 * [`UdpSocket::multicast_loop_v4`]
4430 * [`UdpSocket::set_multicast_ttl_v4`]
4431 * [`UdpSocket::multicast_ttl_v4`]
4432 * [`UdpSocket::set_multicast_loop_v6`]
4433 * [`UdpSocket::multicast_loop_v6`]
4434 * [`UdpSocket::set_multicast_ttl_v6`]
4435 * [`UdpSocket::multicast_ttl_v6`]
4436 * [`UdpSocket::set_ttl`]
4437 * [`UdpSocket::ttl`]
4438 * [`UdpSocket::set_only_v6`]
4439 * [`UdpSocket::only_v6`]
4440 * [`UdpSocket::join_multicast_v4`]
4441 * [`UdpSocket::join_multicast_v6`]
4442 * [`UdpSocket::leave_multicast_v4`]
4443 * [`UdpSocket::leave_multicast_v6`]
4444 * [`UdpSocket::take_error`]
4445 * [`UdpSocket::connect`]
4446 * [`UdpSocket::send`]
4447 * [`UdpSocket::recv`]
4448 * [`UdpSocket::set_nonblocking`]
4453 * [`std::sync::Once` is poisoned if its initialization function
4455 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
4456 * [Most types implement `fmt::Debug`][1.9db].
4457 * [The default buffer size used by `BufReader` and `BufWriter` was
4458 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
4459 used by other languages.
4460 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
4461 `Duration` additionally implements `*=` and `/=`][1.9ta].
4462 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
4463 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
4464 * [`Chain` implements `BufRead`][1.9ch].
4465 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
4470 * [Cargo can now run concurrently][1.9cc].
4471 * [Top-level overrides allow specific revisions of crates to be
4472 overridden through the entire crate graph][1.9ct]. This is intended
4473 to make upgrades easier for large projects, by allowing crates to be
4474 forked temporarily until they've been upgraded and republished.
4475 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
4476 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
4477 on the commandline][1.9cf]. `rustc` arguments can also be specified
4478 in the `build.rustflags` configuration key.
4483 * [The time complexity of comparing variables for equivalence during type
4484 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
4485 to major compilation time improvement in some scenarios.
4486 * [`ToString` is specialized for `str`, giving it the same performance
4487 as `to_owned`][1.9ts].
4488 * [Spawning processes with `Command::output` no longer creates extra
4490 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
4491 for C-like enums][1.9cl].
4496 * [Passing the `--quiet` flag to a test runner will produce
4497 much-abbreviated output][1.9q].
4498 * The Rust Project now publishes std binaries for the
4499 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
4500 `i586-pc-windows-msvc` targets.
4505 * [`std::sync::Once` is poisoned if its initialization function
4507 * [It is illegal to define methods with the same name in overlapping
4508 inherent `impl` blocks][1.9sn].
4509 * [`fn` item types are zero sized, and each `fn` names a unique
4510 type][1.9fn]. This will break code that transmutes `fn`s, so calling
4511 `transmute` on a `fn` type will generate a warning for a few cycles,
4512 then will be converted to an error.
4513 * [Improvements to const evaluation may trigger new errors when integer
4514 literals are out of range][1.9ce].
4517 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
4518 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
4519 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
4520 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
4521 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
4522 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
4523 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
4524 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
4525 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
4526 [1.9db]: https://github.com/rust-lang/rust/pull/32054
4527 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
4528 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
4529 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
4530 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
4531 [1.9o]: https://github.com/rust-lang/rust/pull/32325
4532 [1.9q]: https://github.com/rust-lang/rust/pull/31887
4533 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
4534 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
4535 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
4536 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
4537 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
4538 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
4539 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
4540 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
4541 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
4542 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
4543 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
4544 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
4545 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
4546 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
4547 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
4548 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
4549 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
4550 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
4551 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
4552 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
4553 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
4554 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
4555 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
4556 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
4557 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
4558 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
4559 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
4560 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
4561 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
4562 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
4563 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
4564 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
4565 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
4566 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
4567 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
4568 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
4569 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
4570 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
4571 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
4572 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
4573 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
4574 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
4575 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
4576 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
4577 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
4578 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
4579 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
4580 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
4581 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
4582 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
4583 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
4584 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
4585 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
4586 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
4587 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
4588 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
4589 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
4590 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
4591 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
4592 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
4593 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
4594 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
4595 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
4596 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
4597 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
4598 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
4599 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
4600 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
4601 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
4602 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
4603 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
4604 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
4605 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
4606 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
4607 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
4608 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
4609 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
4610 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
4611 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
4612 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
4613 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
4614 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
4615 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
4616 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
4617 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
4618 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
4619 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
4620 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
4621 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
4622 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
4623 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
4624 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
4625 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
4626 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
4629 Version 1.8.0 (2016-04-14)
4630 ==========================
4635 * Rust supports overloading of compound assignment statements like
4636 `+=` by implementing the [`AddAssign`], [`SubAssign`],
4637 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
4638 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
4640 * Empty structs can be defined with braces, as in `struct Foo { }`, in
4641 addition to the non-braced form, `struct Foo;`. [RFC 218].
4647 * [`str::encode_utf16`][] (renamed from `utf16_units`)
4648 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
4651 * [`ptr::drop_in_place`]
4653 * [`time::SystemTime`]
4655 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
4656 * [`Instant::elapsed`]
4657 * [`SystemTime::now`]
4658 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
4659 * [`SystemTime::elapsed`]
4660 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
4661 * [`SystemTimeError`]
4662 * [`SystemTimeError::duration`]
4663 * Various impls for `SystemTimeError`
4665 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
4666 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
4667 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
4668 * [The `write!` and `writeln!` macros correctly emit errors if any of
4669 their arguments can't be formatted][1.8w].
4670 * [Various I/O functions support large files on 32-bit Linux][1.8l].
4671 * [The Unix-specific `raw` modules, which contain a number of
4672 redefined C types are deprecated][1.8r], including `os::raw::unix`,
4673 `os::raw::macos`, and `os::raw::linux`. These modules defined types
4674 such as `ino_t` and `dev_t`. The inconsistency of these definitions
4675 across platforms was making it difficult to implement `std`
4676 correctly. Those that need these definitions should use the `libc`
4678 * The Unix-specific `MetadataExt` traits, including
4679 `os::unix::fs::MetadataExt`, which expose values such as inode
4680 numbers [no longer return platform-specific types][1.8r], but
4681 instead return widened integers. [RFC 1415].
4682 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
4683 * [Atomic loads and stores are not volatile][1.8a].
4684 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
4689 * [Inlining hash functions lead to a 3% compile-time improvement in
4690 some workloads][1.8h].
4691 * When using jemalloc, its symbols are [unprefixed so that it
4692 overrides the libc malloc implementation][1.8h]. This means that for
4693 rustc, LLVM is now using jemalloc, which results in a 6%
4694 compile-time improvement on a specific workload.
4695 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
4700 * [32-bit MSVC builds finally implement unwinding][1.8ms].
4701 i686-pc-windows-msvc is now considered a tier-1 platform.
4702 * [The `--print targets` flag prints a list of supported targets][1.8t].
4703 * [The `--print cfg` flag prints the `cfg`s defined for the current
4705 * [`rustc` can be built with an new Cargo-based build system, written
4706 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
4707 build system. To enable it configure with `configure --rustbuild`.
4708 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
4709 variants while also indicating the total number of missing variants
4710 if more than 3][1.8m].
4711 * [Executable stacks are disabled on Linux and BSD][1.8nx].
4712 * The Rust Project now publishes binary releases of the standard
4713 library for a number of tier-2 targets:
4714 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
4715 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
4716 `x86_64-rumprun-netbsd`. These can be installed with
4717 tools such as [multirust][1.8mr].
4722 * [`cargo init` creates a new Cargo project in the current
4723 directory][1.8ci]. It is otherwise like `cargo new`.
4724 * [Cargo has configuration keys for `-v` and
4725 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
4726 `[term]` section of `.cargo/config`.
4727 * [Configuration keys that evaluate to strings or integers can be set
4728 via environment variables][1.8ce]. For example the `build.jobs` key
4729 can be set via `CARGO_BUILD_JOBS`. Environment variables take
4730 precedence over config files.
4731 * [Target-specific dependencies support Rust `cfg` syntax for
4732 describing targets][1.8cfg] so that dependencies for multiple
4733 targets can be specified together. [RFC 1361].
4734 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
4735 `RUSTDOC` take precedence over the `build.target-dir`,
4736 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
4737 * [The child process tree is killed on Windows when Cargo is
4739 * [The `build.target` configuration value sets the target platform,
4740 like `--target`][1.8ct].
4745 * [Unstable compiler flags have been further restricted][1.8u]. Since
4746 1.0 `-Z` flags have been considered unstable, and other flags that
4747 were considered unstable additionally required passing `-Z
4748 unstable-options` to access. Unlike unstable language and library
4749 features though, these options have been accessible on the stable
4750 release channel. Going forward, *new unstable flags will not be
4751 available on the stable release channel*, and old unstable flags
4752 will warn about their usage. In the future, all unstable flags will
4753 be unavailable on the stable release channel.
4754 * [It is no longer possible to `match` on empty enum variants using
4755 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
4756 * The Unix-specific `MetadataExt` traits, including
4757 `os::unix::fs::MetadataExt`, which expose values such as inode
4758 numbers [no longer return platform-specific types][1.8r], but
4759 instead return widened integers. [RFC 1415].
4760 * [Modules sourced from the filesystem cannot appear within arbitrary
4761 blocks, but only within other modules][1.8mf].
4762 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
4763 * On Unix, [stack overflow triggers a runtime abort instead of a
4765 * [`Command::spawn` and its equivalents return an error if any of
4766 its command-line arguments contain interior `NUL`s][1.8n].
4767 * [Tuple and unit enum variants from other crates are in the type
4769 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
4770 type instead of `.a` files][1.8st]. Additionally, for the MSVC
4771 toolchain, `rustc` emits import libraries named `foo.dll.lib`
4772 instead of `foo.lib`.
4775 [1.8a]: https://github.com/rust-lang/rust/pull/30962
4776 [1.8b]: https://github.com/rust-lang/rust/pull/31123
4777 [1.8c]: https://github.com/rust-lang/rust/pull/31530
4778 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
4779 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
4780 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
4781 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
4782 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
4783 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
4784 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
4785 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
4786 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
4787 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
4788 [1.8h]: https://github.com/rust-lang/rust/pull/31460
4789 [1.8l]: https://github.com/rust-lang/rust/pull/31668
4790 [1.8m]: https://github.com/rust-lang/rust/pull/31020
4791 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
4792 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
4793 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
4794 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
4795 [1.8n]: https://github.com/rust-lang/rust/pull/31056
4796 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
4797 [1.8r]: https://github.com/rust-lang/rust/pull/31551
4798 [1.8so]: https://github.com/rust-lang/rust/pull/31333
4799 [1.8st]: https://github.com/rust-lang/rust/pull/29520
4800 [1.8t]: https://github.com/rust-lang/rust/pull/31358
4801 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
4802 [1.8u]: https://github.com/rust-lang/rust/pull/31793
4803 [1.8v]: https://github.com/rust-lang/rust/pull/31757
4804 [1.8w]: https://github.com/rust-lang/rust/pull/31904
4805 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
4806 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
4807 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
4808 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
4809 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
4810 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
4811 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
4812 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
4813 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
4814 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
4815 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
4816 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
4817 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
4818 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
4819 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
4820 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
4821 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
4822 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
4823 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
4824 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
4825 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
4826 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
4827 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
4828 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
4829 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
4830 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
4831 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
4832 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
4833 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
4834 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
4837 Version 1.7.0 (2016-03-03)
4838 ==========================
4845 * [`Path::strip_prefix`][] (renamed from relative_from)
4846 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
4848 * [`Ipv4Addr::is_loopback`]
4849 * [`Ipv4Addr::is_private`]
4850 * [`Ipv4Addr::is_link_local`]
4851 * [`Ipv4Addr::is_multicast`]
4852 * [`Ipv4Addr::is_broadcast`]
4853 * [`Ipv4Addr::is_documentation`]
4855 * [`Ipv6Addr::is_unspecified`]
4856 * [`Ipv6Addr::is_loopback`]
4857 * [`Ipv6Addr::is_multicast`]
4860 * [`Vec::as_mut_slice`]
4862 * [`String::as_str`]
4863 * [`String::as_mut_str`]
4865 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
4867 * `<[T]>::`[`sort_by_key`]
4868 * checked, saturated, and overflowing operations
4869 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
4870 * [`i32::saturating_mul`]
4871 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
4872 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
4873 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
4874 * [`u32::saturating_mul`]
4875 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
4876 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
4877 * and checked, saturated, and overflowing operations for other primitive types
4879 * [`ffi::IntoStringError`]
4880 * [`CString::into_string`]
4881 * [`CString::into_bytes`]
4882 * [`CString::into_bytes_with_nul`]
4883 * `From<CString> for Vec<u8>`
4885 * [`IntoStringError::into_cstring`]
4886 * [`IntoStringError::utf8_error`]
4887 * `Error for IntoStringError`
4889 * [`std::hash::BuildHasher`]
4890 * [`BuildHasher::Hasher`]
4891 * [`BuildHasher::build_hasher`]
4892 * [`std::hash::BuildHasherDefault`]
4893 * [`HashMap::with_hasher`]
4894 * [`HashMap::with_capacity_and_hasher`]
4895 * [`HashSet::with_hasher`]
4896 * [`HashSet::with_capacity_and_hasher`]
4897 * [`std::collections::hash_map::RandomState`]
4898 * [`RandomState::new`]
4899 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
4900 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
4901 from bytes is faster.
4902 * [The performance of `LineWriter` (and thus `io::stdout`) was
4903 improved by using `memchr` to search for newlines][1.7m].
4904 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
4905 `f64` variants were stabilized previously.
4906 * [`BTreeMap` was rewritten to use less memory and improve the performance
4907 of insertion and iteration, the latter by as much as 5x][1.7bm].
4908 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
4909 covariant over their contained type][1.7bt].
4910 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
4911 over their contained type][1.7ll].
4912 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
4914 * [`Any` is implemented for unsized types][1.7a].
4915 * [`Hash` is implemented for `Duration`][1.7h].
4920 * [When running tests with `--test`, rustdoc will pass `--cfg`
4921 arguments to the compiler][1.7dt].
4922 * [The compiler is built with RPATH information by default][1.7rpa].
4923 This means that it will be possible to run `rustc` when installed in
4924 unusual configurations without configuring the dynamic linker search
4926 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
4927 any RPATH entries (emitted with `-C rpath`) *not* take precedence
4928 over `LD_LIBRARY_PATH`.
4933 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
4934 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
4935 * [The `rerun-if-changed` build script directive no longer causes the
4936 build script to incorrectly run twice in certain scenarios][1.7rr].
4941 * Soundness fixes to the interactions between associated types and
4942 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
4943 code that violates the new rules. This is a significant change that
4944 is known to break existing code, so it has emitted warnings for the
4945 new error cases since 1.4 to give crate authors time to adapt. The
4946 details of what is changing are subtle; read the RFC for more.
4947 * [Several bugs in the compiler's visibility calculations were
4948 fixed][1.7v]. Since this was found to break significant amounts of
4949 code, the new errors will be emitted as warnings for several release
4950 cycles, under the `private_in_public` lint.
4951 * Defaulted type parameters were accidentally accepted in positions
4952 that were not intended. In this release, [defaulted type parameters
4953 appearing outside of type definitions will generate a
4954 warning][1.7d], which will become an error in future releases.
4955 * [Parsing "." as a float results in an error instead of 0][1.7p].
4956 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
4957 * [Borrows of closure parameters may not outlive the closure][1.7bc].
4959 [1.7a]: https://github.com/rust-lang/rust/pull/30928
4960 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
4961 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
4962 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
4963 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
4964 [1.7d]: https://github.com/rust-lang/rust/pull/30724
4965 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
4966 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
4967 [1.7f]: https://github.com/rust-lang/rust/pull/30672
4968 [1.7h]: https://github.com/rust-lang/rust/pull/30818
4969 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
4970 [1.7m]: https://github.com/rust-lang/rust/pull/30381
4971 [1.7p]: https://github.com/rust-lang/rust/pull/30681
4972 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
4973 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
4974 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
4975 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
4976 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
4977 [1.7v]: https://github.com/rust-lang/rust/pull/29973
4978 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4979 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4980 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
4981 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
4982 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
4983 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
4984 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
4985 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
4986 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
4987 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
4988 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
4989 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
4990 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
4991 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
4992 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
4993 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
4994 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
4995 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
4996 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
4997 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
4998 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
4999 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
5000 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
5001 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
5002 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
5003 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
5004 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
5005 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
5006 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
5007 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
5008 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
5009 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
5010 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
5011 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
5012 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
5013 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
5014 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
5015 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
5016 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
5017 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
5018 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
5019 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
5020 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
5021 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
5022 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
5023 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
5024 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
5025 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
5026 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
5027 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
5028 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
5029 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
5030 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
5031 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
5032 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
5033 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
5034 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
5035 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
5036 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
5037 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
5040 Version 1.6.0 (2016-01-21)
5041 ==========================
5046 * The `#![no_std]` attribute causes a crate to not be linked to the
5047 standard library, but only the [core library][1.6co], as described
5048 in [RFC 1184]. The core library defines common types and traits but
5049 has no platform dependencies whatsoever, and is the basis for Rust
5050 software in environments that cannot support a full port of the
5051 standard library, such as operating systems. Most of the core
5052 library is now stable.
5058 [`Read::read_exact`],
5059 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
5060 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
5061 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
5062 [`os::unix::fs::DirBuilderExt`],
5063 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
5064 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
5065 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
5066 [`collections::hash_map::Drain`],
5067 [`collections::hash_map::HashMap::drain`],
5068 [`collections::hash_set::Drain`],
5069 [`collections::hash_set::HashSet::drain`],
5070 [`collections::binary_heap::Drain`],
5071 [`collections::binary_heap::BinaryHeap::drain`],
5072 [`Vec::extend_from_slice`][] (renamed from `push_all`),
5073 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
5074 [`RwLock::into_inner`],
5075 [`Iterator::min_by_key`][] (renamed from `min_by`),
5076 [`Iterator::max_by_key`][] (renamed from `max_by`).
5077 * The [core library][1.6co] is stable, as are most of its APIs.
5078 * [The `assert_eq!` macro supports arguments that don't implement
5079 `Sized`][1.6ae], such as arrays. In this way it behaves more like
5081 * Several timer functions that take duration in milliseconds [are
5082 deprecated in favor of those that take `Duration`][1.6ms]. These
5083 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
5084 `thread::park_timeout_ms`.
5085 * The algorithm by which `Vec` reserves additional elements was
5086 [tweaked to not allocate excessive space][1.6a] while still growing
5088 * `From` conversions are [implemented from integers to floats][1.6f]
5089 in cases where the conversion is lossless. Thus they are not
5090 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
5091 or `f64`. They are also not implemented for `isize` and `usize`
5092 because the implementations would be platform-specific. `From` is
5093 also implemented from `f32` to `f64`.
5094 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
5095 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
5096 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
5097 * [`BinaryHeap` was refactored][1.6bh] for modest performance
5099 * Sorting slices that are already sorted [is 50% faster in some
5105 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
5106 * Cargo build scripts can specify their dependencies by emitting the
5107 [`rerun-if-changed`][1.6rr] key.
5108 * crates.io will reject publication of crates with dependencies that
5109 have a wildcard version constraint. Crates with wildcard
5110 dependencies were seen to cause a variety of problems, as described
5111 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
5113 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
5114 release folder. A variety of artifacts that Cargo failed to clean
5115 are now correctly deleted.
5120 * The `unreachable_code` lint [warns when a function call's argument
5122 * The parser indicates [failures that may be caused by
5123 confusingly-similar Unicode characters][1.6uc]
5124 * Certain macro errors [are reported at definition time][1.6m], not
5130 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
5131 environment variable when locating crates. This was a pre-cargo
5132 feature for integrating with the package manager that was
5133 accidentally never removed.
5134 * [A number of bugs were fixed in the privacy checker][1.6p] that
5135 could cause previously-accepted code to break.
5136 * [Modules and unit/tuple structs may not share the same name][1.6ts].
5137 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
5138 struct pattern syntax (`Foo(..)`) can no longer be used to match
5139 unit structs. This is a warning now, but will become an error in
5140 future releases. Patterns that share the same name as a const are
5142 * A bug was fixed that causes [rustc not to apply default type
5143 parameters][1.6xc] when resolving certain method implementations of
5144 traits defined in other crates.
5146 [1.6a]: https://github.com/rust-lang/rust/pull/29454
5147 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
5148 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
5149 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
5150 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
5151 [1.6co]: http://doc.rust-lang.org/core/index.html
5152 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
5153 [1.6f]: https://github.com/rust-lang/rust/pull/29129
5154 [1.6m]: https://github.com/rust-lang/rust/pull/29828
5155 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
5156 [1.6p]: https://github.com/rust-lang/rust/pull/29726
5157 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
5158 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
5159 [1.6s]: https://github.com/rust-lang/rust/pull/29675
5160 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
5161 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
5162 [1.6us]: https://github.com/rust-lang/rust/pull/29383
5163 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
5164 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
5165 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
5166 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
5167 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
5168 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
5169 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
5170 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
5171 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
5172 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
5173 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
5174 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
5175 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
5176 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
5177 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
5178 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
5179 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
5180 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
5181 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
5182 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
5183 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
5184 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
5185 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
5186 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
5187 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
5188 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
5189 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
5190 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
5191 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
5192 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
5195 Version 1.5.0 (2015-12-10)
5196 ==========================
5198 * ~700 changes, numerous bugfixes
5204 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
5205 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
5206 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
5207 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
5208 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
5209 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
5210 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
5211 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
5212 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
5213 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
5214 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
5215 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
5216 [`Path::read_link`], [`Path::symlink_metadata`],
5217 [`Utf8Error::valid_up_to`], [`Vec::resize`],
5218 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
5219 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
5220 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
5221 [`slice::split_first_mut`], [`slice::split_first`],
5222 [`slice::split_last_mut`], [`slice::split_last`],
5223 [`char::from_u32_unchecked`], [`fs::canonicalize`],
5224 [`str::MatchIndices`], [`str::RMatchIndices`],
5225 [`str::match_indices`], [`str::rmatch_indices`],
5226 [`str::slice_mut_unchecked`], [`string::ParseError`].
5227 * Rust applications hosted on crates.io can be installed locally to
5228 `~/.cargo/bin` with the [`cargo install`] command. Among other
5229 things this makes it easier to augment Cargo with new subcommands:
5230 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
5231 invoked as `cargo foo`.
5232 * Crates with wildcard (`*`) dependencies will [emit warnings when
5233 published][1.5w]. In 1.6 it will no longer be possible to publish
5234 crates with wildcard dependencies.
5239 * The rules determining when a particular lifetime must outlive
5240 a particular value (known as '[dropck]') have been [modified
5241 to not rely on parametricity][1.5p].
5242 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
5243 and `Arc`][1.5a]. Because these smart pointer types implement
5244 `Deref`, this causes breakage in cases where the interior type
5245 contains methods of the same name.
5246 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
5247 that they could drop their content. Soundness fix.
5248 * All method invocations are [properly checked][1.5wf1] for
5249 [well-formedness][1.5wf2]. Soundness fix.
5250 * Traits whose supertraits contain `Self` are [not object
5251 safe][1.5o]. Soundness fix.
5252 * Target specifications support a [`no_default_libraries`][1.5nd]
5253 setting that controls whether `-nodefaultlibs` is passed to the
5254 linker, and in turn the `is_like_windows` setting no longer affects
5255 the `-nodefaultlibs` flag.
5256 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
5257 * The `#[inline]` and `#[repr]` attributes [can only appear
5258 in valid locations][1.5at].
5259 * Native libraries linked from the local crate are [passed to
5260 the linker before native libraries from upstream crates][1.5nl].
5261 * Two rarely-used attributes, `#[no_debug]` and
5262 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
5263 * Negation of unsigned integers, which has been a warning for
5264 several releases, [is now behind a feature gate and will
5265 generate errors][1.5nu].
5266 * The parser accidentally accepted visibility modifiers on
5267 enum variants, a bug [which has been fixed][1.5ev].
5268 * [A bug was fixed that allowed `use` statements to import unstable
5274 * When evaluating expressions at compile-time that are not
5275 compile-time constants (const-evaluating expressions in non-const
5276 contexts), incorrect code such as overlong bitshifts and arithmetic
5277 overflow will [generate a warning instead of an error][1.5ce],
5278 delaying the error until runtime. This will allow the
5279 const-evaluator to be expanded in the future backwards-compatibly.
5280 * The `improper_ctypes` lint [no longer warns about using `isize` and
5281 `usize` in FFI][1.5ict].
5286 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
5288 * `Default` is [implemented for mutable slices][1.5d].
5289 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
5290 * There are now `From` conversions [between floating point
5291 types][1.5f] where the conversions are lossless.
5292 * There are now `From` conversions [between integer types][1.5i] where
5293 the conversions are lossless.
5294 * [`fs::Metadata` implements `Clone`][1.5fs].
5295 * The `parse` method [accepts a leading "+" when parsing
5297 * [`AsMut` is implemented for `Vec`][1.5am].
5298 * The `clone_from` implementations for `String` and `BinaryHeap` [have
5299 been optimized][1.5cf] and no longer rely on the default impl.
5300 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
5301 `unsafe extern "C"` function types now [implement `Clone`,
5302 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
5303 `fmt::Debug` for up to 12 arguments][1.5fp].
5304 * [Dropping `Vec`s is much faster in unoptimized builds when the
5305 element types don't implement `Drop`][1.5dv].
5306 * A bug that caused in incorrect behavior when [combining `VecDeque`
5307 with zero-sized types][1.5vdz] was resolved.
5308 * [`PartialOrd` for slices is faster][1.5po].
5313 * [Crate metadata size was reduced by 20%][1.5md].
5314 * [Improvements to code generation reduced the size of libcore by 3.3
5315 MB and rustc's memory usage by 18MB][1.5m].
5316 * [Improvements to deref translation increased performance in
5317 unoptimized builds][1.5dr].
5318 * Various errors in trait resolution [are deduplicated to only be
5319 reported once][1.5te].
5320 * Rust has preliminary [support for rumprun kernels][1.5rr].
5321 * Rust has preliminary [support for NetBSD on amd64][1.5na].
5323 [1.5use]: https://github.com/rust-lang/rust/pull/28364
5324 [1.5po]: https://github.com/rust-lang/rust/pull/28436
5325 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
5326 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
5327 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
5328 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
5329 [1.5md]: https://github.com/rust-lang/rust/pull/28521
5330 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
5331 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
5332 [1.5na]: https://github.com/rust-lang/rust/pull/28543
5333 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
5334 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
5335 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
5336 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
5337 [1.5te]: https://github.com/rust-lang/rust/pull/28645
5338 [1.5at]: https://github.com/rust-lang/rust/pull/28650
5339 [1.5am]: https://github.com/rust-lang/rust/pull/28663
5340 [1.5m]: https://github.com/rust-lang/rust/pull/28778
5341 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
5342 [1.5a]: https://github.com/rust-lang/rust/pull/28811
5343 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
5344 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
5345 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
5346 [1.5i]: https://github.com/rust-lang/rust/pull/28921
5347 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
5348 [1.5f]: https://github.com/rust-lang/rust/pull/29129
5349 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
5350 [1.5s]: https://github.com/rust-lang/rust/pull/29190
5351 [1.5d]: https://github.com/rust-lang/rust/pull/29245
5352 [1.5o]: https://github.com/rust-lang/rust/pull/29259
5353 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
5354 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
5355 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
5356 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
5357 [1.5c]: https://github.com/rust-lang/rust/pull/29110
5358 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
5359 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
5360 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
5361 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
5362 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
5363 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
5364 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
5365 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
5366 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
5367 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
5368 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
5369 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
5370 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
5371 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
5372 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
5373 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
5374 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
5375 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
5376 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
5377 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
5378 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
5379 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
5380 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
5381 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
5382 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
5383 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
5384 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
5385 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
5386 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
5387 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
5388 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
5389 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
5390 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
5391 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
5392 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
5393 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
5394 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
5395 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
5396 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
5397 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
5398 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
5399 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
5400 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
5401 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
5402 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
5403 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
5404 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
5405 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
5406 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
5407 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
5408 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
5409 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
5410 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
5411 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
5413 Version 1.4.0 (2015-10-29)
5414 ==========================
5416 * ~1200 changes, numerous bugfixes
5421 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
5422 GNU) are now supported and recommended for use.
5427 * [Several changes have been made to fix type soundness and improve
5428 the behavior of associated types][sound]. See [RFC 1214]. Although
5429 we have mostly introduced these changes as warnings this release, to
5430 become errors next release, there are still some scenarios that will
5431 see immediate breakage.
5432 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
5433 line breaks in addition to `\n`][crlf].
5434 * [Loans of `'static` lifetime extend to the end of a function][stat].
5435 * [`str::parse` no longer introduces avoidable rounding error when
5436 parsing floating point numbers. Together with earlier changes to
5437 float formatting/output, "round trips" like f.to_string().parse()
5438 now preserve the value of f exactly. Additionally, leading plus
5439 signs are now accepted][fp3].
5445 * `use` statements that import multiple items [can now rename
5446 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
5447 * [Binops work correctly on fat pointers][binfat].
5448 * `pub extern crate`, which does not behave as expected, [issues a
5449 warning][pec] until a better solution is found.
5454 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
5455 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
5456 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
5457 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
5458 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
5459 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
5460 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
5461 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
5462 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
5463 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
5464 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
5465 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
5466 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
5467 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
5468 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
5469 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
5470 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
5471 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
5473 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
5474 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
5475 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
5476 `f64::from_str_radix`.
5477 * [Reverse-searching strings is faster with the 'two-way'
5479 * [`std::io::copy` allows `?Sized` arguments][cc].
5480 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
5481 [override `count`, `nth` and `last` with an O(1)
5482 implementation][it].
5483 * [`Default` is implemented for arrays up to `[T; 32]`][d].
5484 * [`IntoRawFd` has been added to the Unix-specific prelude,
5485 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
5487 * [`Extend<String>` and `FromIterator<String` are both implemented for
5489 * [`IntoIterator` is implemented for references to `Option` and
5491 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
5492 Copy`][ext] as part of [RFC 839]. This will cause type inference
5493 breakage in rare situations.
5494 * [`BinaryHeap` implements `Debug`][bh2].
5495 * [`Borrow` and `BorrowMut` are implemented for fixed-size
5497 * [`extern fn`s with the "Rust" and "C" ABIs implement common
5498 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
5499 * [String comparison is faster][faststr].
5500 * `&mut T` where `T: std::fmt::Write` [also implements
5501 `std::fmt::Write`][mutw].
5502 * [A stable regression in `VecDeque::push_back` and other
5503 capacity-altering methods that caused panics for zero-sized types
5505 * [Function pointers implement traits for up to 12 parameters][fp2].
5510 * The compiler [no longer uses the 'morestack' feature to prevent
5511 stack overflow][mm]. Instead it uses guard pages and stack
5512 probes (though stack probes are not yet implemented on any platform
5514 * [The compiler matches traits faster when projections are involved][p].
5515 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
5517 * [Cargo now displays useful information about what its doing during
5518 `cargo update`][cu].
5520 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
5521 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
5522 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
5523 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
5524 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
5525 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
5526 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
5527 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
5528 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
5529 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
5530 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
5531 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
5532 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
5533 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
5534 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
5535 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
5536 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
5537 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
5538 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
5539 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
5540 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
5541 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
5542 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
5543 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
5544 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
5545 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
5546 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
5547 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
5548 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
5549 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
5550 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
5551 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
5552 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
5553 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
5554 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
5555 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
5556 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
5557 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
5558 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
5559 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
5560 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
5561 [bh2]: https://github.com/rust-lang/rust/pull/28156
5562 [binfat]: https://github.com/rust-lang/rust/pull/28270
5563 [bm]: https://github.com/rust-lang/rust/pull/28197
5564 [cc]: https://github.com/rust-lang/rust/pull/27531
5565 [crlf]: https://github.com/rust-lang/rust/pull/28034
5566 [cu]: https://github.com/rust-lang/cargo/pull/1931
5567 [d]: https://github.com/rust-lang/rust/pull/27825
5568 [dep]: https://github.com/rust-lang/rust/pull/28339
5569 [es]: https://github.com/rust-lang/rust/pull/27956
5570 [ext]: https://github.com/rust-lang/rust/pull/28094
5571 [faststr]: https://github.com/rust-lang/rust/pull/28338
5572 [ffi]: https://github.com/rust-lang/rust/pull/28779
5573 [fp]: https://github.com/rust-lang/rust/pull/28268
5574 [fp2]: https://github.com/rust-lang/rust/pull/28560
5575 [fp3]: https://github.com/rust-lang/rust/pull/27307
5576 [i]: https://github.com/rust-lang/rust/pull/27451
5577 [into2]: https://github.com/rust-lang/rust/pull/28039
5578 [it]: https://github.com/rust-lang/rust/pull/27652
5579 [mm]: https://github.com/rust-lang/rust/pull/27338
5580 [mutw]: https://github.com/rust-lang/rust/pull/28368
5581 [sound]: https://github.com/rust-lang/rust/pull/27641
5582 [p]: https://github.com/rust-lang/rust/pull/27866
5583 [pec]: https://github.com/rust-lang/rust/pull/28486
5584 [pr]: https://github.com/rust-lang/rust/pull/27896
5585 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
5586 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
5587 [s]: https://github.com/rust-lang/rust/pull/27474
5588 [stab]: https://github.com/rust-lang/rust/pull/28339
5589 [stat]: https://github.com/rust-lang/rust/pull/28321
5590 [vd]: https://github.com/rust-lang/rust/pull/28494
5592 Version 1.3.0 (2015-09-17)
5593 ==============================
5595 * ~900 changes, numerous bugfixes
5600 * The [new object lifetime defaults][nold] have been [turned
5601 on][nold2] after a cycle of warnings about the change. Now types
5602 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
5603 being interpreted as `&'a Box<Trait+'a>` to `&'a
5604 Box<Trait+'static>`.
5605 * [The Rustonomicon][nom] is a new book in the official documentation
5606 that dives into writing unsafe Rust.
5607 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
5608 timekeeping is employed by other std APIs, as well as out-of-tree
5614 * The [new object lifetime defaults][nold] have been [turned
5615 on][nold2] after a cycle of warnings about the change.
5616 * There is a known [regression][lr] in how object lifetime elision is
5617 interpreted, the proper solution for which is undetermined.
5618 * The `#[prelude_import]` attribute, an internal implementation
5619 detail, was accidentally stabilized previously. [It has been put
5620 behind the `prelude_import` feature gate][pi]. This change is
5621 believed to break no existing code.
5622 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
5623 [more sane for dynamically sized types][dst3]. Code that relied on
5624 the previous behavior is thought to be broken.
5625 * The `dropck` rules, which checks that destructors can't access
5626 destroyed values, [have been updated][dropck] to match the
5627 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
5628 cause some previously-compiling code to no longer build.
5633 * The [new object lifetime defaults][nold] have been [turned
5634 on][nold2] after a cycle of warnings about the change.
5635 * Semicolons may [now follow types and paths in
5636 macros](https://github.com/rust-lang/rust/pull/27000).
5637 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
5638 [more sane for dynamically sized types][dst3]. Code that relied on
5639 the previous behavior is not known to exist, and suspected to be
5641 * `'static` variables [may now be recursive][st].
5642 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
5643 implementations correctly.
5644 * The `dropck` rules, which checks that destructors can't access
5645 destroyed values, [have been updated][dropck] to match the
5651 * The [`Duration`] API, [has been stabilized][ds], as well as the
5652 `std::time` module, which presently contains only `Duration`.
5653 * `Box<str>` and `Box<[T]>` both implement `Clone`.
5654 * The owned C string, [`CString`], implements [`Borrow`] and the
5655 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
5656 these allow C strings to be borrowed and cloned in generic code.
5657 * [`CStr`] implements [`Debug`].
5658 * [`AtomicPtr`] implements [`Debug`].
5659 * [`Error`] trait objects [can be downcast to their concrete types][e]
5660 in many common configurations, using the [`is`], [`downcast`],
5661 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
5663 * Searching for substrings now [employs the two-way algorithm][search]
5664 instead of doing a naive search. This gives major speedups to a
5665 number of methods, including [`contains`][sc], [`find`][sf],
5666 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
5667 [`ends_with`][sew] are also faster.
5668 * The performance of `PartialEq` for slices is [much faster][ps].
5669 * The [`Hash`] trait offers the default method, [`hash_slice`], which
5670 is overridden and optimized by the implementations for scalars.
5671 * The [`Hasher`] trait now has a number of specialized `write_*`
5672 methods for primitive types, for efficiency.
5673 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
5674 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
5675 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
5676 of [`std::error::Error::cause`][iec] also delegates to the inner
5678 * [`process::Child`][pc] gained the [`id`] method, which returns a
5679 `u32` representing the platform-specific process identifier.
5680 * The [`connect`] method on slices is deprecated, replaced by the new
5681 [`join`] method (note that both of these are on the *unstable*
5682 [`SliceConcatExt`] trait, but through the magic of the prelude are
5683 available to stable code anyway).
5684 * The [`Div`] operator is implemented for [`Wrapping`] types.
5685 * [`DerefMut` is implemented for `String`][dms].
5686 * Performance of SipHash (the default hasher for `HashMap`) is
5687 [better for long data][sh].
5688 * [`AtomicPtr`] implements [`Send`].
5689 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
5690 are now [specialized to use uninitialized buffers for increased
5692 * Lifetime parameters of foreign functions [are now resolved
5698 * Rust can now, with some coercion, [produce programs that run on
5699 Windows XP][xp], though XP is not considered a supported platform.
5700 * Porting Rust on Windows from the GNU toolchain to MSVC continues
5701 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
5702 recommended for use in 1.3, though should be fully-functional
5703 in the [64-bit 1.4 beta][b14].
5704 * On Fedora-based systems installation will [properly configure the
5705 dynamic linker][fl].
5706 * The compiler gained many new extended error descriptions, which can
5707 be accessed with the `--explain` flag.
5708 * The `dropck` pass, which checks that destructors can't access
5709 destroyed values, [has been rewritten][dropck]. This fixes some
5710 soundness holes, and as such will cause some previously-compiling
5711 code to no longer build.
5712 * `rustc` now uses [LLVM to write archive files where possible][ar].
5713 Eventually this will eliminate the compiler's dependency on the ar
5715 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
5716 supported FreeBSD on x86_64).
5717 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
5718 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
5720 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
5721 will kill the process instead of leaking][nlp].
5723 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
5724 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
5725 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
5726 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
5727 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
5728 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
5729 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
5730 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
5731 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
5732 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
5733 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
5734 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
5735 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
5736 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
5737 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
5738 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
5739 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
5740 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
5741 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
5742 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
5743 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
5744 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
5745 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
5746 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
5747 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
5748 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
5749 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
5750 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
5751 [ar]: https://github.com/rust-lang/rust/pull/26926
5752 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
5753 [dms]: https://github.com/rust-lang/rust/pull/26241
5754 [dropck]: https://github.com/rust-lang/rust/pull/27261
5755 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
5756 [ds]: https://github.com/rust-lang/rust/pull/26818
5757 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
5758 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
5759 [dst3]: https://github.com/rust-lang/rust/pull/27351
5760 [e]: https://github.com/rust-lang/rust/pull/24793
5761 [f]: https://github.com/rust-lang/rust/pull/26588
5762 [fb]: https://github.com/rust-lang/rust/pull/26959
5763 [fl]: https://github.com/rust-lang/rust-installer/pull/41
5764 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
5765 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
5766 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
5767 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
5768 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
5769 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
5770 [lic]: https://github.com/rust-lang/rust/pull/26583
5771 [lnu]: https://github.com/rust-lang/rust/pull/27026
5772 [lr]: https://github.com/rust-lang/rust/issues/27248
5773 [lum]: https://github.com/rust-lang/rust/pull/26378
5774 [lur]: https://github.com/rust-lang/rust/pull/26783
5775 [nlp]: https://github.com/rust-lang/rust/pull/27176
5776 [nold2]: https://github.com/rust-lang/rust/pull/27045
5777 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
5778 [nom]: http://doc.rust-lang.org/nightly/nomicon/
5779 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
5780 [pi]: https://github.com/rust-lang/rust/pull/26699
5781 [ps]: https://github.com/rust-lang/rust/pull/26884
5782 [rte]: https://github.com/rust-lang/rust/pull/26950
5783 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
5784 [search]: https://github.com/rust-lang/rust/pull/26327
5785 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
5786 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
5787 [sh]: https://github.com/rust-lang/rust/pull/27280
5788 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
5789 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
5790 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
5791 [st]: https://github.com/rust-lang/rust/pull/26630
5792 [win1]: https://github.com/rust-lang/rust/pull/26569
5793 [win2]: https://github.com/rust-lang/rust/pull/26741
5794 [win3]: https://github.com/rust-lang/rust/pull/26741
5795 [win4]: https://github.com/rust-lang/rust/pull/27210
5796 [xp]: https://github.com/rust-lang/rust/pull/26569
5798 Version 1.2.0 (2015-08-07)
5799 ==========================
5801 * ~1200 changes, numerous bugfixes
5806 * [Dynamically-sized-type coercions][dst] allow smart pointer types
5807 like `Rc` to contain types without a fixed size, arrays and trait
5808 objects, finally enabling use of `Rc<[T]>` and completing the
5809 implementation of DST.
5810 * [Parallel codegen][parcodegen] is now working again, which can
5811 substantially speed up large builds in debug mode; It also gets
5812 another ~33% speedup when bootstrapping on a 4 core machine (using 8
5813 jobs). It's not enabled by default, but will be "in the near
5814 future". It can be activated with the `-C codegen-units=N` flag to
5816 * This is the first release with [experimental support for linking
5817 with the MSVC linker and lib C on Windows (instead of using the GNU
5818 variants via MinGW)][win]. It is yet recommended only for the most
5819 intrepid Rustaceans.
5820 * Benchmark compilations are showing a 30% improvement in
5821 bootstrapping over 1.1.
5826 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
5827 unicode case mapping, which is a previously-planned change in
5828 behavior and considered a bugfix.
5829 * [`mem::align_of`] now specifies [the *minimum alignment* for
5830 T][align], which is usually the alignment programs are interested
5831 in, and the same value reported by clang's
5832 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
5834 * [The `#[packed]` attribute is no longer silently accepted by the
5835 compiler][packed]. This attribute did nothing and code that
5836 mentioned it likely did not work as intended.
5837 * Associated type defaults are [now behind the
5838 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
5839 defaults *did not work*, but could be mentioned syntactically. As
5840 such this breakage has minimal impact.
5845 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
5846 matching against dereferenceable values.
5851 * The [`Extend`] trait, which grows a collection from an iterator, is
5852 implemented over iterators of references, for `String`, `Vec`,
5853 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
5854 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
5855 * The [`iter::once`] function returns an iterator that yields a single
5856 element, and [`iter::empty`] returns an iterator that yields no
5858 * The [`matches`] and [`rmatches`] methods on `str` return iterators
5859 over substring matches.
5860 * [`Cell`] and [`RefCell`] both implement `Eq`.
5861 * A number of methods for wrapping arithmetic are added to the
5862 integral types, [`wrapping_div`], [`wrapping_rem`],
5863 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
5864 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
5865 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
5866 type.. It is illegal for the default arithmetic operations in Rust
5867 to overflow; the desire to wrap must be explicit.
5868 * The `{:#?}` formatting specifier [displays the alternate,
5869 pretty-printed][debugfmt] form of the `Debug` formatter. This
5870 feature was actually introduced prior to 1.0 with little
5872 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
5873 for writing data to formatted strings, similar to [`io::Write`].
5874 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
5875 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
5876 are used by code generators to emit implementations of [`Debug`].
5877 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
5878 methods that convert case, following Unicode case mapping.
5879 * It is now easier to handle poisoned locks. The [`PoisonError`]
5880 type, returned by failing lock operations, exposes `into_inner`,
5881 `get_ref`, and `get_mut`, which all give access to the inner lock
5882 guard, and allow the poisoned lock to continue to operate. The
5883 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
5884 poisoned lock without attempting to take the lock.
5885 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
5886 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
5887 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
5888 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
5890 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
5896 * `rustc` employs smarter heuristics for guessing at [typos].
5897 * `rustc` emits more efficient code for [no-op conversions between
5898 unsafe pointers][nop].
5899 * Fat pointers are now [passed in pairs of immediate arguments][fat],
5900 resulting in faster compile times and smaller code.
5902 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
5903 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
5904 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
5905 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
5906 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
5907 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
5908 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
5909 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
5910 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
5911 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
5912 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
5913 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
5914 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
5915 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
5916 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
5917 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
5918 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
5919 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
5920 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
5921 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
5922 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
5923 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
5924 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
5925 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
5926 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
5927 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
5928 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
5929 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
5930 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
5931 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
5932 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
5933 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
5934 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
5935 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
5936 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
5937 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
5938 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
5939 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
5940 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
5941 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
5942 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
5943 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
5944 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
5945 [align]: https://github.com/rust-lang/rust/pull/25646
5946 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
5947 [typos]: https://github.com/rust-lang/rust/pull/26087
5948 [nop]: https://github.com/rust-lang/rust/pull/26336
5949 [fat]: https://github.com/rust-lang/rust/pull/26411
5950 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
5951 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
5952 [packed]: https://github.com/rust-lang/rust/pull/25541
5953 [ad]: https://github.com/rust-lang/rust/pull/27382
5954 [win]: https://github.com/rust-lang/rust/pull/25350
5956 Version 1.1.0 (2015-06-25)
5957 =========================
5959 * ~850 changes, numerous bugfixes
5964 * The [`std::fs` module has been expanded][fs] to expand the set of
5965 functionality exposed:
5966 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
5967 don't incur a syscall on some platforms.
5968 * A `symlink_metadata` function has been added.
5969 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
5970 access to all underlying information.
5971 * The compiler now contains extended explanations of many errors. When an error
5972 with an explanation occurs the compiler suggests using the `--explain` flag
5973 to read the explanation. Error explanations are also [available online][err-index].
5974 * Thanks to multiple [improvements][sk] to [type checking][pre], as
5975 well as other work, the time to bootstrap the compiler decreased by
5981 * The [`str::split_whitespace`] method splits a string on unicode
5982 whitespace boundaries.
5983 * On both Windows and Unix, new extension traits provide conversion of
5984 I/O types to and from the underlying system handles. On Unix, these
5985 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
5986 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
5987 `TcpListener`, and `UpdSocket`. Further implementations for
5988 `std::process` will be stabilized later.
5989 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
5990 Windows, symlinks can be created with
5991 `std::os::windows::symlink_dir` and
5992 `std::os::windows::symlink_file`.
5993 * The `mpsc::Receiver` type can now be converted into an iterator with
5994 `into_iter` on the [`IntoIterator`] trait.
5995 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
5996 implementation of the [`From`] trait.
5997 * The `Debug` implementation for `RangeFull` [creates output that is
5998 more consistent with other implementations][rf].
5999 * [`Debug` is implemented for `File`][file].
6000 * The `Default` implementation for `Arc` [no longer requires `Sync +
6002 * [The `Iterator` methods `count`, `nth`, and `last` have been
6003 overridden for slices to have O(1) performance instead of O(n)][si].
6004 * Incorrect handling of paths on Windows has been improved in both the
6005 compiler and the standard library.
6006 * [`AtomicPtr` gained a `Default` implementation][ap].
6007 * In accordance with Rust's policy on arithmetic overflow `abs` now
6008 [panics on overflow when debug assertions are enabled][abs].
6009 * The [`Cloned`] iterator, which was accidentally left unstable for
6010 1.0 [has been stabilized][c].
6011 * The [`Incoming`] iterator, which iterates over incoming TCP
6012 connections, and which was accidentally unnamable in 1.0, [is now
6013 properly exported][inc].
6014 * [`BinaryHeap`] no longer corrupts itself [when functions called by
6015 `sift_up` or `sift_down` panic][bh].
6016 * The [`split_off`] method of `LinkedList` [no longer corrupts
6017 the list in certain scenarios][ll].
6022 * Type checking performance [has improved notably][sk] with
6023 [multiple improvements][pre].
6024 * The compiler [suggests code changes][ch] for more errors.
6025 * rustc and it's build system have experimental support for [building
6026 toolchains against MUSL][m] instead of glibc on Linux.
6027 * The compiler defines the `target_env` cfg value, which is used for
6028 distinguishing toolchains that are otherwise for the same
6029 platform. Presently this is set to `gnu` for common GNU Linux
6030 targets and for MinGW targets, and `musl` for MUSL Linux targets.
6031 * The [`cargo rustc`][crc] command invokes a build with custom flags
6033 * [Android executables are always position independent][pie].
6034 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
6037 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
6038 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
6039 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
6040 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
6041 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
6042 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
6043 [rf]: https://github.com/rust-lang/rust/pull/24491
6044 [err-index]: https://doc.rust-lang.org/error-index.html
6045 [sk]: https://github.com/rust-lang/rust/pull/24615
6046 [pre]: https://github.com/rust-lang/rust/pull/25323
6047 [file]: https://github.com/rust-lang/rust/pull/24598
6048 [ch]: https://github.com/rust-lang/rust/pull/24683
6049 [arc]: https://github.com/rust-lang/rust/pull/24695
6050 [si]: https://github.com/rust-lang/rust/pull/24701
6051 [ap]: https://github.com/rust-lang/rust/pull/24834
6052 [m]: https://github.com/rust-lang/rust/pull/24777
6053 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
6054 [crc]: https://github.com/rust-lang/cargo/pull/1568
6055 [pie]: https://github.com/rust-lang/rust/pull/24953
6056 [abs]: https://github.com/rust-lang/rust/pull/25441
6057 [c]: https://github.com/rust-lang/rust/pull/25496
6058 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
6059 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
6060 [inc]: https://github.com/rust-lang/rust/pull/25522
6061 [bh]: https://github.com/rust-lang/rust/pull/25856
6062 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
6063 [ll]: https://github.com/rust-lang/rust/pull/26022
6064 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
6065 [drop]: https://github.com/rust-lang/rust/pull/24935
6067 Version 1.0.0 (2015-05-15)
6068 ========================
6070 * ~1500 changes, numerous bugfixes
6075 * The vast majority of the standard library is now `#[stable]`. It is
6076 no longer possible to use unstable features with a stable build of
6078 * Many popular crates on [crates.io] now work on the stable release
6080 * Arithmetic on basic integer types now [checks for overflow in debug
6086 * Several [restrictions have been added to trait coherence][coh] in
6087 order to make it easier for upstream authors to change traits
6088 without breaking downstream code.
6089 * Digits of binary and octal literals are [lexed more eagerly][lex] to
6090 improve error messages and macro behavior. For example, `0b1234` is
6091 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
6092 * Trait bounds [are always invariant][inv], eliminating the need for
6093 the `PhantomFn` and `MarkerTrait` lang items, which have been
6095 * ["-" is no longer a valid character in crate names][cr], the `extern crate
6096 "foo" as bar` syntax has been replaced with `extern crate foo as
6097 bar`, and Cargo now automatically translates "-" in *package* names
6098 to underscore for the crate name.
6099 * [Lifetime shadowing is an error][lt].
6100 * [`Send` no longer implies `'static`][send-rfc].
6101 * [UFCS now supports trait-less associated paths][moar-ufcs] like
6102 `MyType::default()`.
6103 * Primitive types [now have inherent methods][prim-inherent],
6104 obviating the need for extension traits like `SliceExt`.
6105 * Methods with `Self: Sized` in their `where` clause are [considered
6106 object-safe][self-sized], allowing many extension traits like
6107 `IteratorExt` to be merged into the traits they extended.
6108 * You can now [refer to associated types][assoc-where] whose
6109 corresponding trait bounds appear only in a `where` clause.
6110 * The final bits of [OIBIT landed][oibit-final], meaning that traits
6111 like `Send` and `Sync` are now library-defined.
6112 * A [Reflect trait][reflect] was introduced, which means that
6113 downcasting via the `Any` trait is effectively limited to concrete
6114 types. This helps retain the potentially-important "parametricity"
6115 property: generic code cannot behave differently for different type
6116 arguments except in minor ways.
6117 * The `unsafe_destructor` feature is now deprecated in favor of the
6118 [new `dropck`][dropck]. This change is a major reduction in unsafe
6124 * The `thread_local` module [has been renamed to `std::thread`][th].
6125 * The methods of `IteratorExt` [have been moved to the `Iterator`
6127 * Several traits that implement Rust's conventions for type
6128 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
6129 [centralized in the `std::convert` module][con].
6130 * The `FromError` trait [was removed in favor of `From`][fe].
6131 * The basic sleep function [has moved to
6132 `std::thread::sleep_ms`][slp].
6133 * The `splitn` function now takes an `n` parameter that represents the
6134 number of items yielded by the returned iterator [instead of the
6135 number of 'splits'][spl].
6136 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
6137 * [Derived implementations of `PartialOrd` now order enums according
6138 to their explicitly-assigned discriminants][po].
6139 * [Methods for searching strings are generic over `Pattern`s][pat],
6140 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
6142 * [In method resolution, object methods are resolved before inherent
6144 * [`String::from_str` has been deprecated in favor of the `From` impl,
6145 `String::from`][sf].
6146 * [`io::Error` implements `Sync`][ios].
6147 * [The `words` method on `&str` has been replaced with
6148 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
6150 * The new path and IO modules are complete and `#[stable]`. This
6151 was the major library focus for this cycle.
6152 * The path API was [revised][path-normalize] to normalize `.`,
6153 adjusting the tradeoffs in favor of the most common usage.
6154 * A large number of remaining APIs in `std` were also stabilized
6155 during this cycle; about 75% of the non-deprecated API surface
6157 * The new [string pattern API][string-pattern] landed, which makes
6158 the string slice API much more internally consistent and flexible.
6159 * A new set of [generic conversion traits][conversion] replaced
6160 many existing ad hoc traits.
6161 * Generic numeric traits were [completely removed][num-traits]. This
6162 was made possible thanks to inherent methods for primitive types,
6163 and the removal gives maximal flexibility for designing a numeric
6164 hierarchy in the future.
6165 * The `Fn` traits are now related via [inheritance][fn-inherit]
6166 and provide ergonomic [blanket implementations][fn-blanket].
6167 * The `Index` and `IndexMut` traits were changed to
6168 [take the index by value][index-value], enabling code like
6169 `hash_map["string"]` to work.
6170 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
6171 `Copy` data is known to be `Clone` as well.
6176 * Many errors now have extended explanations that can be accessed with
6177 the `--explain` flag to `rustc`.
6178 * Many new examples have been added to the standard library
6180 * rustdoc has received a number of improvements focused on completion
6182 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
6183 * Much headway was made on ecosystem-wide CI, making it possible
6184 to [compare builds for breakage][ci-compare].
6187 [crates.io]: http://crates.io
6188 [clo]: https://github.com/rust-lang/rust/pull/24034
6189 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
6190 [con]: https://github.com/rust-lang/rust/pull/23875
6191 [cr]: https://github.com/rust-lang/rust/pull/23419
6192 [fe]: https://github.com/rust-lang/rust/pull/23879
6193 [ie]: https://github.com/rust-lang/rust/pull/23300
6194 [inv]: https://github.com/rust-lang/rust/pull/23938
6195 [ios]: https://github.com/rust-lang/rust/pull/24133
6196 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
6197 [lt]: https://github.com/rust-lang/rust/pull/24057
6198 [meth]: https://github.com/rust-lang/rust/pull/24056
6199 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
6200 [po]: https://github.com/rust-lang/rust/pull/24270
6201 [sf]: https://github.com/rust-lang/rust/pull/24517
6202 [slp]: https://github.com/rust-lang/rust/pull/23949
6203 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
6204 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
6205 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
6206 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
6207 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
6208 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
6209 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
6210 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
6211 [self-sized]: https://github.com/rust-lang/rust/pull/22301
6212 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
6213 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
6214 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
6215 [reflect]: https://github.com/rust-lang/rust/pull/23712
6216 [conversion]: https://github.com/rust-lang/rfcs/pull/529
6217 [num-traits]: https://github.com/rust-lang/rust/pull/23549
6218 [index-value]: https://github.com/rust-lang/rust/pull/23601
6219 [dropck]: https://github.com/rust-lang/rfcs/pull/769
6220 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
6221 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
6222 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
6223 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
6224 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
6227 Version 1.0.0-alpha.2 (2015-02-20)
6228 =====================================
6230 * ~1300 changes, numerous bugfixes
6234 * The various I/O modules were [overhauled][io-rfc] to reduce
6235 unnecessary abstractions and provide better interoperation with
6236 the underlying platform. The old `io` module remains temporarily
6238 * The standard library now [participates in feature gating][feat],
6239 so use of unstable libraries now requires a `#![feature(...)]`
6240 attribute. The impact of this change is [described on the
6241 forum][feat-forum]. [RFC][feat-rfc].
6245 * `for` loops [now operate on the `IntoIterator` trait][into],
6246 which eliminates the need to call `.iter()`, etc. to iterate
6247 over collections. There are some new subtleties to remember
6248 though regarding what sort of iterators various types yield, in
6249 particular that `for foo in bar { }` yields values from a move
6250 iterator, destroying the original collection. [RFC][into-rfc].
6251 * Objects now have [default lifetime bounds][obj], so you don't
6252 have to write `Box<Trait+'static>` when you don't care about
6253 storing references. [RFC][obj-rfc].
6254 * In types that implement `Drop`, [lifetimes must outlive the
6255 value][drop]. This will soon make it possible to safely
6256 implement `Drop` for types where `#[unsafe_destructor]` is now
6257 required. Read the [gorgeous RFC][drop-rfc] for details.
6258 * The fully qualified <T as Trait>::X syntax lets you set the Self
6259 type for a trait method or associated type. [RFC][ufcs-rfc].
6260 * References to types that implement `Deref<U>` now [automatically
6261 coerce to references][deref] to the dereferenced type `U`,
6262 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
6263 should eliminate many unsightly uses of `&*`, as when converting
6264 from references to vectors into references to
6265 slices. [RFC][deref-rfc].
6266 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
6267 `|:|`) is obsolete and closure kind is inferred from context.
6268 * [`Self` is a keyword][Self].
6272 * The `Show` and `String` formatting traits [have been
6273 renamed][fmt] to `Debug` and `Display` to more clearly reflect
6274 their related purposes. Automatically getting a string
6275 conversion to use with `format!("{:?}", something_to_debug)` is
6276 now written `#[derive(Debug)]`.
6277 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
6278 OsStr}`, provide strings in platform-specific encodings for easier
6279 interop with system APIs. [RFC][osstr-rfc].
6280 * The `boxed::into_raw` and `Box::from_raw` functions [convert
6281 between `Box<T>` and `*mut T`][boxraw], a common pattern for
6282 creating raw pointers.
6286 * Certain long error messages of the form 'expected foo found bar'
6287 are now [split neatly across multiple
6288 lines][multiline]. Examples in the PR.
6289 * On Unix Rust can be [uninstalled][un] by running
6290 `/usr/local/lib/rustlib/uninstall.sh`.
6291 * The `#[rustc_on_unimplemented]` attribute, requiring the
6292 'on_unimplemented' feature, lets rustc [display custom error
6293 messages when a trait is expected to be implemented for a type
6298 * Rust is tested against a [LALR grammar][lalr], which parses
6299 almost all the Rust files that rustc does.
6301 [boxraw]: https://github.com/rust-lang/rust/pull/21318
6302 [close]: https://github.com/rust-lang/rust/pull/21843
6303 [deref]: https://github.com/rust-lang/rust/pull/21351
6304 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
6305 [drop]: https://github.com/rust-lang/rust/pull/21972
6306 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
6307 [feat]: https://github.com/rust-lang/rust/pull/21248
6308 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
6309 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
6310 [fmt]: https://github.com/rust-lang/rust/pull/21457
6311 [into]: https://github.com/rust-lang/rust/pull/20790
6312 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
6313 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
6314 [lalr]: https://github.com/rust-lang/rust/pull/21452
6315 [multiline]: https://github.com/rust-lang/rust/pull/19870
6316 [obj]: https://github.com/rust-lang/rust/pull/22230
6317 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
6318 [onun]: https://github.com/rust-lang/rust/pull/20889
6319 [osstr]: https://github.com/rust-lang/rust/pull/21488
6320 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
6321 [Self]: https://github.com/rust-lang/rust/pull/22158
6322 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
6323 [un]: https://github.com/rust-lang/rust/pull/22256
6326 Version 1.0.0-alpha (2015-01-09)
6327 ==================================
6329 * ~2400 changes, numerous bugfixes
6333 * The language itself is considered feature complete for 1.0,
6334 though there will be many usability improvements and bugfixes
6335 before the final release.
6336 * Nearly 50% of the public API surface of the standard library has
6337 been declared 'stable'. Those interfaces are unlikely to change
6339 * The long-running debate over integer types has been
6340 [settled][ints]: Rust will ship with types named `isize` and
6341 `usize`, rather than `int` and `uint`, for pointer-sized
6342 integers. Guidelines will be rolled out during the alpha cycle.
6343 * Most crates that are not `std` have been moved out of the Rust
6344 distribution into the Cargo ecosystem so they can evolve
6345 separately and don't need to be stabilized as quickly, including
6346 'time', 'getopts', 'num', 'regex', and 'term'.
6347 * Documentation continues to be expanded with more API coverage, more
6348 examples, and more in-depth explanations. The guides have been
6349 consolidated into [The Rust Programming Language][trpl].
6350 * "[Rust By Example][rbe]" is now maintained by the Rust team.
6351 * All official Rust binary installers now come with [Cargo], the
6352 Rust package manager.
6356 * Closures have been [completely redesigned][unboxed] to be
6357 implemented in terms of traits, can now be used as generic type
6358 bounds and thus monomorphized and inlined, or via an opaque
6359 pointer (boxed) as in the old system. The new system is often
6360 referred to as 'unboxed' closures.
6361 * Traits now support [associated types][assoc], allowing families
6362 of related types to be defined together and used generically in
6364 * Enum variants are [namespaced by their type names][enum].
6365 * [`where` clauses][where] provide a more versatile and attractive
6366 syntax for specifying generic bounds, though the previous syntax
6368 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
6370 * Rust [no longer has a runtime][rt] of any description, and only
6371 supports OS threads, not green threads.
6372 * At long last, Rust has been overhauled for 'dynamically-sized
6373 types' ([DST]), which integrates 'fat pointers' (object types,
6374 arrays, and `str`) more deeply into the type system, making it
6376 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
6377 `..j` that produce range types and which, when combined with the
6378 `Index` operator and multidispatch, leads to a convenient slice
6380 * The new range syntax revealed an ambiguity in the fixed-length
6381 array syntax, so now fixed length arrays [are written `[T;
6383 * The `Copy` trait is no longer implemented automatically. Unsafe
6384 pointers no longer implement `Sync` and `Send` so types
6385 containing them don't automatically either. `Sync` and `Send`
6386 are now 'unsafe traits' so one can "forcibly" implement them via
6387 `unsafe impl` if a type confirms to the requirements for them
6388 even though the internals do not (e.g. structs containing unsafe
6389 pointers like `Arc`). These changes are intended to prevent some
6390 footguns and are collectively known as [opt-in built-in
6391 traits][oibit] (though `Sync` and `Send` will soon become pure
6392 library types unknown to the compiler).
6393 * Operator traits now take their operands [by value][ops], and
6394 comparison traits can use multidispatch to compare one type
6395 against multiple other types, allowing e.g. `String` to be
6396 compared with `&str`.
6397 * `if let` and `while let` are no longer feature-gated.
6398 * Rust has adopted a more [uniform syntax for escaping unicode
6399 characters][unicode].
6400 * `macro_rules!` [has been declared stable][mac]. Though it is a
6401 flawed system it is sufficiently popular that it must be usable
6402 for 1.0. Effort has gone into [future-proofing][mac-future] it
6403 in ways that will allow other macro systems to be developed in
6404 parallel, and won't otherwise impact the evolution of the
6406 * The prelude has been [pared back significantly][prelude] such
6407 that it is the minimum necessary to support the most pervasive
6408 code patterns, and through [generalized where clauses][where]
6409 many of the prelude extension traits have been consolidated.
6410 * Rust's rudimentary reflection [has been removed][refl], as it
6411 incurred too much code generation for little benefit.
6412 * [Struct variants][structvars] are no longer feature-gated.
6413 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
6414 known as 'higher-ranked trait bounds', this crucially allows
6415 unboxed closures to work.
6416 * Macros invocations surrounded by parens or square brackets and
6417 not terminated by a semicolon are [parsed as
6418 expressions][macros], which makes expressions like `vec![1i32,
6419 2, 3].len()` work as expected.
6420 * Trait objects now implement their traits automatically, and
6421 traits that can be coerced to objects now must be [object
6423 * Automatically deriving traits is now done with `#[derive(...)]`
6424 not `#[deriving(...)]` for [consistency with other naming
6425 conventions][derive].
6426 * Importing the containing module or enum at the same time as
6427 items or variants they contain is [now done with `self` instead
6428 of `mod`][self], as in use `foo::{self, bar}`
6429 * Glob imports are no longer feature-gated.
6430 * The `box` operator and `box` patterns have been feature-gated
6431 pending a redesign. For now unique boxes should be allocated
6432 like other containers, with `Box::new`.
6436 * A [series][coll1] of [efforts][coll2] to establish
6437 [conventions][coll3] for collections types has resulted in API
6438 improvements throughout the standard library.
6439 * New [APIs for error handling][err] provide ergonomic interop
6440 between error types, and [new conventions][err-conv] describe
6441 more clearly the recommended error handling strategies in Rust.
6442 * The `fail!` macro has been renamed to [`panic!`][panic] so that
6443 it is easier to discuss failure in the context of error handling
6444 without making clarifications as to whether you are referring to
6445 the 'fail' macro or failure more generally.
6446 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
6447 syscall when available.
6448 * The 'serialize' crate has been renamed 'rustc-serialize' and
6449 moved out of the distribution to Cargo. Although it is widely
6450 used now, it is expected to be superseded in the near future.
6451 * The `Show` formatter, typically implemented with
6452 `#[derive(Show)]` is [now requested with the `{:?}`
6453 specifier][show] and is intended for use by all types, for uses
6454 such as `println!` debugging. The new `String` formatter must be
6455 implemented by hand, uses the `{}` specifier, and is intended
6456 for full-fidelity conversions of things that can logically be
6457 represented as strings.
6461 * [Flexible target specification][flex] allows rustc's code
6462 generation to be configured to support otherwise-unsupported
6464 * Rust comes with rust-gdb and rust-lldb scripts that launch their
6465 respective debuggers with Rust-appropriate pretty-printing.
6466 * The Windows installation of Rust is distributed with the
6467 MinGW components currently required to link binaries on that
6472 * Nullable enum optimizations have been extended to more types so
6473 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
6474 space than the inner types themselves.
6475 * Work has begun on supporting AArch64.
6477 [Cargo]: https://crates.io
6478 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
6479 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
6480 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
6481 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
6482 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
6483 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
6484 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
6485 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
6486 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
6487 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
6488 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
6489 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
6490 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
6491 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
6492 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
6493 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
6494 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
6495 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
6496 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
6497 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
6498 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
6499 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
6500 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
6501 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
6502 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
6503 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
6504 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
6505 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
6506 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
6507 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
6508 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
6509 [trpl]: https://doc.rust-lang.org/book/index.html
6510 [rbe]: http://rustbyexample.com/
6513 Version 0.12.0 (2014-10-09)
6514 =============================
6516 * ~1900 changes, numerous bugfixes
6520 * The introductory documentation (now called The Rust Guide) has
6521 been completely rewritten, as have a number of supplementary
6523 * Rust's package manager, Cargo, continues to improve and is
6524 sometimes considered to be quite awesome.
6525 * Many API's in `std` have been reviewed and updated for
6526 consistency with the in-development Rust coding
6527 guidelines. The standard library documentation tracks
6528 stabilization progress.
6529 * Minor libraries have been moved out-of-tree to the rust-lang org
6530 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
6531 be installed with Cargo.
6532 * Lifetime elision allows lifetime annotations to be left off of
6533 function declarations in many common scenarios.
6534 * Rust now works on 64-bit Windows.
6537 * Indexing can be overloaded with the `Index` and `IndexMut`
6539 * The `if let` construct takes a branch only if the `let` pattern
6540 matches, currently behind the 'if_let' feature gate.
6541 * 'where clauses', a more flexible syntax for specifying trait
6542 bounds that is more aesthetic, have been added for traits and
6543 free functions. Where clauses will in the future make it
6544 possible to constrain associated types, which would be
6545 impossible with the existing syntax.
6546 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
6547 the 'slicing_syntax' feature gate, and can be overloaded with
6548 the `Slice` or `SliceMut` traits.
6549 * The syntax for matching of sub-slices has been changed to use a
6550 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
6551 consistency with other uses of `..` and to future-proof
6552 potential additional uses of the syntax.
6553 * The syntax for matching inclusive ranges in patterns has changed
6554 from `0..3` to `0...4` to be consistent with the exclusive range
6556 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
6557 c]`) has been put behind the 'advanced_slice_patterns' feature
6558 gate and may be removed in the future.
6559 * Components of tuples and tuple structs can be extracted using
6560 the `value.0` syntax, currently behind the `tuple_indexing`
6562 * The `#[crate_id]` attribute is no longer supported; versioning
6563 is handled by the package manager.
6564 * Renaming crate imports are now written `extern crate foo as bar`
6565 instead of `extern crate bar = foo`.
6566 * Renaming use statements are now written `use foo as bar` instead
6568 * `let` and `match` bindings and argument names in macros are now
6570 * The new, more efficient, closure types ('unboxed closures') have
6571 been added under a feature gate, 'unboxed_closures'. These will
6572 soon replace the existing closure types, once higher-ranked
6573 trait lifetimes are added to the language.
6574 * `move` has been added as a keyword, for indicating closures
6575 that capture by value.
6576 * Mutation and assignment is no longer allowed in pattern guards.
6577 * Generic structs and enums can now have trait bounds.
6578 * The `Share` trait is now called `Sync` to free up the term
6579 'shared' to refer to 'shared reference' (the default reference
6581 * Dynamically-sized types have been mostly implemented,
6582 unifying the behavior of fat-pointer types with the rest of the
6584 * As part of dynamically-sized types, the `Sized` trait has been
6585 introduced, which qualifying types implement by default, and
6586 which type parameters expect by default. To specify that a type
6587 parameter does not need to be sized, write `<Sized? T>`. Most
6588 types are `Sized`, notable exceptions being unsized arrays
6589 (`[T]`) and trait types.
6590 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
6591 * Lifetime bounds can now be applied to type parameters and object
6593 * The old, reference counted GC type, `Gc<T>` which was once
6594 denoted by the `@` sigil, has finally been removed. GC will be
6595 revisited in the future.
6598 * Library documentation has been improved for a number of modules.
6599 * Bit-vectors, collections::bitv has been modernized.
6600 * The url crate is deprecated in favor of
6601 http://github.com/servo/rust-url, which can be installed with
6603 * Most I/O stream types can be cloned and subsequently closed from
6605 * A `std::time::Duration` type has been added for use in I/O
6606 methods that rely on timers, as well as in the 'time' crate's
6607 `Timespec` arithmetic.
6608 * The runtime I/O abstraction layer that enabled the green thread
6609 scheduler to do non-thread-blocking I/O has been removed, along
6610 with the libuv-based implementation employed by the green thread
6611 scheduler. This will greatly simplify the future I/O work.
6612 * `collections::btree` has been rewritten to have a more
6613 idiomatic and efficient design.
6616 * rustdoc output now indicates the stability levels of API's.
6617 * The `--crate-name` flag can specify the name of the crate
6618 being compiled, like `#[crate_name]`.
6619 * The `-C metadata` specifies additional metadata to hash into
6620 symbol names, and `-C extra-filename` specifies additional
6621 information to put into the output filename, for use by the
6622 package manager for versioning.
6623 * debug info generation has continued to improve and should be
6624 more reliable under both gdb and lldb.
6625 * rustc has experimental support for compiling in parallel
6626 using the `-C codegen-units` flag.
6627 * rustc no longer encodes rpath information into binaries by
6631 * Stack usage has been optimized with LLVM lifetime annotations.
6632 * Official Rust binaries on Linux are more compatible with older
6633 kernels and distributions, built on CentOS 5.10.
6636 Version 0.11.0 (2014-07-02)
6637 ==========================
6639 * ~1700 changes, numerous bugfixes
6642 * ~[T] has been removed from the language. This type is superseded by
6644 * ~str has been removed from the language. This type is superseded by
6646 * ~T has been removed from the language. This type is superseded by the
6648 * @T has been removed from the language. This type is superseded by the
6649 standard library's std::gc::Gc<T> type.
6650 * Struct fields are now all private by default.
6651 * Vector indices and shift amounts are both required to be a `uint`
6652 instead of any integral type.
6653 * Byte character, byte string, and raw byte string literals are now all
6654 supported by prefixing the normal literal with a `b`.
6655 * Multiple ABIs are no longer allowed in an ABI string
6656 * The syntax for lifetimes on closures/procedures has been tweaked
6657 slightly: `<'a>|A, B|: 'b + K -> T`
6658 * Floating point modulus has been removed from the language; however it
6659 is still provided by a library implementation.
6660 * Private enum variants are now disallowed.
6661 * The `priv` keyword has been removed from the language.
6662 * A closure can no longer be invoked through a &-pointer.
6663 * The `use foo, bar, baz;` syntax has been removed from the language.
6664 * The transmute intrinsic no longer works on type parameters.
6665 * Statics now allow blocks/items in their definition.
6666 * Trait bounds are separated from objects with + instead of : now.
6667 * Objects can no longer be read while they are mutably borrowed.
6668 * The address of a static is now marked as insignificant unless the
6669 #[inline(never)] attribute is placed it.
6670 * The #[unsafe_destructor] attribute is now behind a feature gate.
6671 * Struct literals are no longer allowed in ambiguous positions such as
6672 if, while, match, and for..in.
6673 * Declaration of lang items and intrinsics are now feature-gated by
6675 * Integral literals no longer default to `int`, and floating point
6676 literals no longer default to `f64`. Literals must be suffixed with an
6677 appropriate type if inference cannot determine the type of the
6679 * The Box<T> type is no longer implicitly borrowed to &mut T.
6680 * Procedures are now required to not capture borrowed references.
6683 * The standard library is now a "facade" over a number of underlying
6684 libraries. This means that development on the standard library should
6685 be speedier due to smaller crates, as well as a clearer line between
6687 * A new library, libcore, lives under the standard library's facade
6688 which is Rust's "0-assumption" library, suitable for embedded and
6689 kernel development for example.
6690 * A regex crate has been added to the standard distribution. This crate
6691 includes statically compiled regular expressions.
6692 * The unwrap/unwrap_err methods on Result require a Show bound for
6693 better error messages.
6694 * The return types of the std::comm primitives have been centralized
6695 around the Result type.
6696 * A number of I/O primitives have gained the ability to time out their
6698 * A number of I/O primitives have gained the ability to close their
6699 reading/writing halves to cancel pending operations.
6700 * Reverse iterator methods have been removed in favor of `rev()` on
6701 their forward-iteration counterparts.
6702 * A bitflags! macro has been added to enable easy interop with C and
6703 management of bit flags.
6704 * A debug_assert! macro is now provided which is disabled when
6705 `--cfg ndebug` is passed to the compiler.
6706 * A graphviz crate has been added for creating .dot files.
6707 * The std::cast module has been migrated into std::mem.
6708 * The std::local_data api has been migrated from freestanding functions
6709 to being based on methods.
6710 * The Pod trait has been renamed to Copy.
6711 * jemalloc has been added as the default allocator for types.
6712 * The API for allocating memory has been changed to use proper alignment
6713 and sized deallocation
6714 * Connecting a TcpStream or binding a TcpListener is now based on a
6715 string address and a u16 port. This allows connecting to a hostname as
6717 * The Reader trait now contains a core method, read_at_least(), which
6718 correctly handles many repeated 0-length reads.
6719 * The process-spawning API is now centered around a builder-style
6721 * The :? printing qualifier has been moved from the standard library to
6722 an external libdebug crate.
6723 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
6724 have been renamed to Eq/Ord.
6725 * The select/plural methods have been removed from format!. The escapes
6726 for { and } have also changed from \{ and \} to {{ and }},
6728 * The TaskBuilder API has been re-worked to be a true builder, and
6729 extension traits for spawning native/green tasks have been added.
6732 * All breaking changes to the language or libraries now have their
6733 commit message annotated with `[breaking-change]` to allow for easy
6734 discovery of breaking changes.
6735 * The compiler will now try to suggest how to annotate lifetimes if a
6736 lifetime-related error occurs.
6737 * Debug info continues to be improved greatly with general bug fixes and
6738 better support for situations like link time optimization (LTO).
6739 * Usage of syntax extensions when cross-compiling has been fixed.
6740 * Functionality equivalent to GCC & Clang's -ffunction-sections,
6741 -fdata-sections and --gc-sections has been enabled by default
6742 * The compiler is now stricter about where it will load module files
6743 from when a module is declared via `mod foo;`.
6744 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
6745 Syntax extensions are now discovered via a "plugin registrar" type
6746 which will be extended in the future to other various plugins.
6747 * Lints have been restructured to allow for dynamically loadable lints.
6748 * A number of rustdoc improvements:
6749 * The HTML output has been visually redesigned.
6750 * Markdown is now powered by hoedown instead of sundown.
6751 * Searching heuristics have been greatly improved.
6752 * The search index has been reduced in size by a great amount.
6753 * Cross-crate documentation via `pub use` has been greatly improved.
6754 * Primitive types are now hyperlinked and documented.
6755 * Documentation has been moved from static.rust-lang.org/doc to
6757 * A new sandbox, play.rust-lang.org, is available for running and
6758 sharing rust code examples on-line.
6759 * Unused attributes are now more robustly warned about.
6760 * The dead_code lint now warns about unused struct fields.
6761 * Cross-compiling to iOS is now supported.
6762 * Cross-compiling to mipsel is now supported.
6763 * Stability attributes are now inherited by default and no longer apply
6764 to intra-crate usage, only inter-crate usage.
6765 * Error message related to non-exhaustive match expressions have been
6769 Version 0.10 (2014-04-03)
6770 =========================
6772 * ~1500 changes, numerous bugfixes
6775 * A new RFC process is now in place for modifying the language.
6776 * Patterns with `@`-pointers have been removed from the language.
6777 * Patterns with unique vectors (`~[T]`) have been removed from the
6779 * Patterns with unique strings (`~str`) have been removed from the
6781 * `@str` has been removed from the language.
6782 * `@[T]` has been removed from the language.
6783 * `@self` has been removed from the language.
6784 * `@Trait` has been removed from the language.
6785 * Headers on `~` allocations which contain `@` boxes inside the type for
6786 reference counting have been removed.
6787 * The semantics around the lifetimes of temporary expressions have changed,
6788 see #3511 and #11585 for more information.
6789 * Cross-crate syntax extensions are now possible, but feature gated. See
6790 #11151 for more information. This includes both `macro_rules!` macros as
6791 well as syntax extensions such as `format!`.
6792 * New lint modes have been added, and older ones have been turned on to be
6794 * Unnecessary parentheses
6797 * Uppercase variables
6798 * Publicly visible private types
6799 * `#[deriving]` with raw pointers
6800 * Unsafe functions can no longer be coerced to closures.
6801 * Various obscure macros such as `log_syntax!` are now behind feature gates.
6802 * The `#[simd]` attribute is now behind a feature gate.
6803 * Visibility is no longer allowed on `extern crate` statements, and
6804 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
6805 * Trailing commas are now allowed in argument lists and tuple patterns.
6806 * The `do` keyword has been removed, it is now a reserved keyword.
6807 * Default type parameters have been implemented, but are feature gated.
6808 * Borrowed variables through captures in closures are now considered soundly.
6809 * `extern mod` is now `extern crate`
6810 * The `Freeze` trait has been removed.
6811 * The `Share` trait has been added for types that can be shared among
6813 * Labels in macros are now hygienic.
6814 * Expression/statement macro invocations can be delimited with `{}` now.
6815 * Treatment of types allowed in `static mut` locations has been tweaked.
6816 * The `*` and `.` operators are now overloadable through the `Deref` and
6818 * `~Trait` and `proc` no longer have `Send` bounds by default.
6819 * Partial type hints are now supported with the `_` type marker.
6820 * An `Unsafe` type was introduced for interior mutability. It is now
6821 considered undefined to transmute from `&T` to `&mut T` without using the
6823 * The #[linkage] attribute was implemented for extern statics/functions.
6824 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
6825 * `Pod` was renamed to `Copy`.
6828 * The `libextra` library has been removed. It has now been decomposed into
6829 component libraries with smaller and more focused nuggets of
6830 functionality. The full list of libraries can be found on the
6831 documentation index page.
6832 * std: `std::condition` has been removed. All I/O errors are now propagated
6833 through the `Result` type. In order to assist with error handling, a
6834 `try!` macro for unwrapping errors with an early return and a lint for
6835 unused results has been added. See #12039 for more information.
6836 * std: The `vec` module has been renamed to `slice`.
6837 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
6838 This will become the only growable vector in the future.
6839 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
6840 are now found at `std::io::BufferedReader` instead of
6841 `std::io::buffered::BufferedReader`.
6842 * std: `print` and `println` are no longer in the prelude, the `print!` and
6843 `println!` macros are intended to be used instead.
6844 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
6845 attempts to statically prevent cycles.
6846 * std: The standard distribution is adopting the policy of pushing failure
6847 to the user rather than failing in libraries. Many functions (such as
6848 `slice::last()`) now return `Option<T>` instead of `T` + failing.
6849 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
6850 deriving mode: `#[deriving(Show)]`.
6851 * std: `ToStr` is now implemented for all types implementing `Show`.
6852 * std: The formatting trait methods now take `&self` instead of `&T`
6853 * std: The `invert()` method on iterators has been renamed to `rev()`
6854 * std: `std::num` has seen a reduction in the genericity of its traits,
6855 consolidating functionality into a few core traits.
6856 * std: Backtraces are now printed on task failure if the environment
6857 variable `RUST_BACKTRACE` is present.
6858 * std: Naming conventions for iterators have been standardized. More details
6859 can be found on the wiki's style guide.
6860 * std: `eof()` has been removed from the `Reader` trait. Specific types may
6861 still implement the function.
6862 * std: Networking types are now cloneable to allow simultaneous reads/writes.
6863 * std: `assert_approx_eq!` has been removed
6864 * std: The `e` and `E` formatting specifiers for floats have been added to
6865 print them in exponential notation.
6866 * std: The `Times` trait has been removed
6867 * std: Indications of variance and opting out of builtin bounds is done
6868 through marker types in `std::kinds::marker` now
6869 * std: `hash` has been rewritten, `IterBytes` has been removed, and
6870 `#[deriving(Hash)]` is now possible.
6871 * std: `SharedChan` has been removed, `Sender` is now cloneable.
6872 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
6873 * std: `Chan::new` is now `channel()`.
6874 * std: A new synchronous channel type has been implemented.
6875 * std: A `select!` macro is now provided for selecting over `Receiver`s.
6876 * std: `hashmap` and `trie` have been moved to `libcollections`
6877 * std: `run` has been rolled into `io::process`
6878 * std: `assert_eq!` now uses `{}` instead of `{:?}`
6879 * std: The equality and comparison traits have seen some reorganization.
6880 * std: `rand` has moved to `librand`.
6881 * std: `to_{lower,upper}case` has been implemented for `char`.
6882 * std: Logging has been moved to `liblog`.
6883 * collections: `HashMap` has been rewritten for higher performance and less
6885 * native: The default runtime is now `libnative`. If `libgreen` is desired,
6886 it can be booted manually. The runtime guide has more information and
6888 * native: All I/O functionality except signals has been implemented.
6889 * green: Task spawning with `libgreen` has been optimized with stack caching
6890 and various trimming of code.
6891 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
6892 * sync: The `extra::sync` module has been updated to modern rust (and moved
6893 to the `sync` library), tweaking and improving various interfaces while
6894 dropping redundant functionality.
6895 * sync: A new `Barrier` type has been added to the `sync` library.
6896 * sync: An efficient mutex for native and green tasks has been implemented.
6897 * serialize: The `base64` module has seen some improvement. It treats
6898 newlines better, has non-string error values, and has seen general
6900 * fourcc: A `fourcc!` macro was introduced
6901 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
6902 hexadecimal literal.
6905 * `rustpkg` has been deprecated and removed from the main repository. Its
6906 replacement, `cargo`, is under development.
6907 * Nightly builds of rust are now available
6908 * The memory usage of rustc has been improved many times throughout this
6910 * The build process supports disabling rpath support for the rustc binary
6912 * Code generation has improved in some cases, giving more information to the
6913 LLVM optimization passes to enable more extensive optimizations.
6914 * Debuginfo compatibility with lldb on OSX has been restored.
6915 * The master branch is now gated on an android bot, making building for
6916 android much more reliable.
6917 * Output flags have been centralized into one `--emit` flag.
6918 * Crate type flags have been centralized into one `--crate-type` flag.
6919 * Codegen flags have been consolidated behind a `-C` flag.
6920 * Linking against outdated crates now has improved error messages.
6921 * Error messages with lifetimes will often suggest how to annotate the
6922 function to fix the error.
6923 * Many more types are documented in the standard library, and new guides
6925 * Many `rustdoc` improvements:
6926 * code blocks are syntax highlighted.
6927 * render standalone markdown files.
6928 * the --test flag tests all code blocks by default.
6929 * exported macros are displayed.
6930 * re-exported types have their documentation inlined at the location of the
6932 * search works across crates that have been rendered to the same output
6936 Version 0.9 (2014-01-09)
6937 ==========================
6939 * ~1800 changes, numerous bugfixes
6942 * The `float` type has been removed. Use `f32` or `f64` instead.
6943 * A new facility for enabling experimental features (feature gating) has
6944 been added, using the crate-level `#[feature(foo)]` attribute.
6945 * Managed boxes (@) are now behind a feature gate
6946 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
6947 standard library's `Gc` or `Rc` types instead.
6948 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
6949 * Jumping back to the top of a loop is now done with `continue` instead of
6951 * Strings can no longer be mutated through index assignment.
6952 * Raw strings can be created via the basic `r"foo"` syntax or with matched
6953 hash delimiters, as in `r###"foo"###`.
6954 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
6956 * The `&fn` type is now written `|args| -> ret` to match the literal form.
6957 * `@fn`s have been removed.
6958 * `do` only works with procs in order to make it obvious what the cost
6960 * Single-element tuple-like structs can no longer be dereferenced to
6961 obtain the inner value. A more comprehensive solution for overloading
6962 the dereference operator will be provided in the future.
6963 * The `#[link(...)]` attribute has been replaced with
6964 `#[crate_id = "name#vers"]`.
6965 * Empty `impl`s must be terminated with empty braces and may not be
6966 terminated with a semicolon.
6967 * Keywords are no longer allowed as lifetime names; the `self` lifetime
6968 no longer has any special meaning.
6969 * The old `fmt!` string formatting macro has been removed.
6970 * `printf!` and `printfln!` (old-style formatting) removed in favor of
6971 `print!` and `println!`.
6972 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
6973 * The `extern mod foo (name = "bar")` syntax has been removed. Use
6974 `extern mod foo = "bar"` instead.
6975 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
6976 * Macros can have attributes.
6977 * Macros can expand to items with attributes.
6978 * Macros can expand to multiple items.
6979 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
6980 * Comments may be nested.
6981 * Values automatically coerce to trait objects they implement, without
6983 * Enum discriminants are no longer an entire word but as small as needed to
6984 contain all the variants. The `repr` attribute can be used to override
6985 the discriminant size, as in `#[repr(int)]` for integer-sized, and
6986 `#[repr(C)]` to match C enums.
6987 * Non-string literals are not allowed in attributes (they never worked).
6988 * The FFI now supports variadic functions.
6989 * Octal numeric literals, as in `0o7777`.
6990 * The `concat!` syntax extension performs compile-time string concatenation.
6991 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
6992 removed as Rust no longer uses segmented stacks.
6993 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
6994 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
6995 not `*`; ignoring remaining fields of a struct is also done with `..`,
6996 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
6997 * `rustc` supports the "win64" calling convention via `extern "win64"`.
6998 * `rustc` supports the "system" calling convention, which defaults to the
6999 preferred convention for the target platform, "stdcall" on 32-bit Windows,
7001 * The `type_overflow` lint (default: warn) checks literals for overflow.
7002 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
7003 * The `attribute_usage` lint (default: warn) warns about unknown
7005 * The `unknown_features` lint (default: warn) warns about unknown
7007 * The `dead_code` lint (default: warn) checks for dead code.
7008 * Rust libraries can be linked statically to one another
7009 * `#[link_args]` is behind the `link_args` feature gate.
7010 * Native libraries are now linked with `#[link(name = "foo")]`
7011 * Native libraries can be statically linked to a rust crate
7012 (`#[link(name = "foo", kind = "static")]`).
7013 * Native OS X frameworks are now officially supported
7014 (`#[link(name = "foo", kind = "framework")]`).
7015 * The `#[thread_local]` attribute creates thread-local (not task-local)
7016 variables. Currently behind the `thread_local` feature gate.
7017 * The `return` keyword may be used in closures.
7018 * Types that can be copied via a memcpy implement the `Pod` kind.
7019 * The `cfg` attribute can now be used on struct fields and enum variants.
7022 * std: The `option` and `result` API's have been overhauled to make them
7023 simpler, more consistent, and more composable.
7024 * std: The entire `std::io` module has been replaced with one that is
7025 more comprehensive and that properly interfaces with the underlying
7026 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
7028 * std: `io::util` contains a number of useful implementations of
7029 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
7030 `ZeroReader`, `TeeReader`.
7031 * std: The reference counted pointer type `extra::rc` moved into std.
7032 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
7033 just a wrapper around it).
7034 * std: The `Either` type has been removed.
7035 * std: `fmt::Default` can be implemented for any type to provide default
7036 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
7037 * std: The `rand` API continues to be tweaked.
7038 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
7039 on failure in gdb, is now named `rust_fail`.
7040 * std: The `each_key` and `each_value` methods on `HashMap` have been
7041 replaced by the `keys` and `values` iterators.
7042 * std: Functions dealing with type size and alignment have moved from the
7043 `sys` module to the `mem` module.
7044 * std: The `path` module was written and API changed.
7045 * std: `str::from_utf8` has been changed to cast instead of allocate.
7046 * std: `starts_with` and `ends_with` methods added to vectors via the
7047 `ImmutableEqVector` trait, which is in the prelude.
7048 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
7049 if the index is out of bounds.
7050 * std: Task failure no longer propagates between tasks, as the model was
7051 complex, expensive, and incompatible with thread-based tasks.
7052 * std: The `Any` type can be used for dynamic typing.
7053 * std: `~Any` can be passed to the `fail!` macro and retrieved via
7055 * std: Methods that produce iterators generally do not have an `_iter`
7057 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
7058 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
7059 * std: `util::ignore` renamed to `prelude::drop`.
7060 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
7062 * std: `vec::raw` has seen a lot of cleanup and API changes.
7063 * std: The standard library no longer includes any C++ code, and very
7064 minimal C, eliminating the dependency on libstdc++.
7065 * std: Runtime scheduling and I/O functionality has been factored out into
7066 extensible interfaces and is now implemented by two different crates:
7067 libnative, for native threading and I/O; and libgreen, for green threading
7068 and I/O. This paves the way for using the standard library in more limited
7069 embedded environments.
7070 * std: The `comm` module has been rewritten to be much faster, have a
7071 simpler, more consistent API, and to work for both native and green
7073 * std: All libuv dependencies have been moved into the rustuv crate.
7074 * native: New implementations of runtime scheduling on top of OS threads.
7075 * native: New native implementations of TCP, UDP, file I/O, process spawning,
7077 * green: The green thread scheduler and message passing types are almost
7079 * extra: The `flatpipes` module had bitrotted and was removed.
7080 * extra: All crypto functions have been removed and Rust now has a policy of
7081 not reimplementing crypto in the standard library. In the future crypto
7082 will be provided by external crates with bindings to established libraries.
7083 * extra: `c_vec` has been modernized.
7084 * extra: The `sort` module has been removed. Use the `sort` method on
7088 * The `rust` and `rusti` commands have been removed, due to lack of
7090 * `rustdoc` was completely rewritten.
7091 * `rustdoc` can test code examples in documentation.
7092 * `rustpkg` can test packages with the argument, 'test'.
7093 * `rustpkg` supports arbitrary dependencies, including C libraries.
7094 * `rustc`'s support for generating debug info is improved again.
7095 * `rustc` has better error reporting for unbalanced delimiters.
7096 * `rustc`'s JIT support was removed due to bitrot.
7097 * Executables and static libraries can be built with LTO (-Z lto)
7098 * `rustc` adds a `--dep-info` flag for communicating dependencies to
7102 Version 0.8 (2013-09-26)
7103 ============================
7105 * ~2200 changes, numerous bugfixes
7108 * The `for` loop syntax has changed to work with the `Iterator` trait.
7109 * At long last, unwinding works on Windows.
7110 * Default methods are ready for use.
7111 * Many trait inheritance bugs fixed.
7112 * Owned and borrowed trait objects work more reliably.
7113 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
7114 * rustc can omit emission of code for the `debug!` macro if it is passed
7116 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
7117 for foo.rs, then foo/mod.rs, and will generate an error when both are
7119 * Strings no longer contain trailing nulls. The new `std::c_str` module
7120 provides new mechanisms for converting to C strings.
7121 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
7122 * The FFI has been overhauled such that foreign functions are called directly,
7123 instead of through a stack-switching wrapper.
7124 * Calling a foreign function must be done through a Rust function with the
7125 `#[fixed_stack_segment]` attribute.
7126 * The `externfn!` macro can be used to declare both a foreign function and
7127 a `#[fixed_stack_segment]` wrapper at once.
7128 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
7129 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
7130 * `priv` is disallowed everywhere except for struct fields and enum variants.
7131 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
7132 * `ref` bindings in irrefutable patterns work correctly now.
7133 * `char` is now prevented from containing invalid code points.
7134 * Casting to `bool` is no longer allowed.
7135 * `\0` is now accepted as an escape in chars and strings.
7136 * `yield` is a reserved keyword.
7137 * `typeof` is a reserved keyword.
7138 * Crates may be imported by URL with `extern mod foo = "url";`.
7139 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
7140 * Static vectors can be initialized with repeating elements,
7141 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
7142 * Static structs can be initialized with functional record update,
7143 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
7144 * `cfg!` can be used to conditionally execute code based on the crate
7145 configuration, similarly to `#[cfg(...)]`.
7146 * The `unnecessary_qualification` lint detects unneeded module
7147 prefixes (default: allow).
7148 * Arithmetic operations have been implemented on the SIMD types in
7149 `std::unstable::simd`.
7150 * Exchange allocation headers were removed, reducing memory usage.
7151 * `format!` implements a completely new, extensible, and higher-performance
7152 string formatting system. It will replace `fmt!`.
7153 * `print!` and `println!` write formatted strings (using the `format!`
7154 extension) to stdout.
7155 * `write!` and `writeln!` write formatted strings (using the `format!`
7156 extension) to the new Writers in `std::rt::io`.
7157 * The library section in which a function or static is placed may
7158 be specified with `#[link_section = "..."]`.
7159 * The `proto!` syntax extension for defining bounded message protocols
7161 * `macro_rules!` is hygienic for `let` declarations.
7162 * The `#[export_name]` attribute specifies the name of a symbol.
7163 * `unreachable!` can be used to indicate unreachable code, and fails
7167 * std: Transitioned to the new runtime, written in Rust.
7168 * std: Added an experimental I/O library, `rt::io`, based on the new
7170 * std: A new generic `range` function was added to the prelude, replacing
7171 `uint::range` and friends.
7172 * std: `range_rev` no longer exists. Since range is an iterator it can be
7173 reversed with `range(lo, hi).invert()`.
7174 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
7175 renamed to `unwrap_or`.
7176 * std: The `iterator` module was renamed to `iter`.
7177 * std: Integral types now support the `checked_add`, `checked_sub`, and
7178 `checked_mul` operations for detecting overflow.
7179 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
7181 * std: Methods are standardizing on conventions for casting methods:
7182 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
7184 * std: The `CString` type in `c_str` provides new ways to convert to and
7186 * std: `DoubleEndedIterator` can yield elements in two directions.
7187 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
7189 * std: `str::from_bytes` renamed to `str::from_utf8`.
7190 * std: `pop_opt` and `shift_opt` methods added to vectors.
7191 * std: The task-local data interface no longer uses @, and keys are
7192 no longer function pointers.
7193 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
7194 * std: Added `SharedPort` to `comm`.
7195 * std: `Eq` has a default method for `ne`; only `eq` is required
7197 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
7198 is required in implementations.
7199 * std: `is_utf8` performance is improved, impacting many string functions.
7200 * std: `os::MemoryMap` provides cross-platform mmap.
7201 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
7202 are not 'in-bounds' are considered undefined.
7203 * std: Many freestanding functions in `vec` removed in favor of methods.
7204 * std: Many freestanding functions on scalar types removed in favor of
7206 * std: Many options to task builders were removed since they don't make
7207 sense in the new scheduler design.
7208 * std: More containers implement `FromIterator` so can be created by the
7210 * std: More complete atomic types in `unstable::atomics`.
7211 * std: `comm::PortSet` removed.
7212 * std: Mutating methods in the `Set` and `Map` traits have been moved into
7213 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
7214 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
7215 default implementations.
7216 * std: Various `from_str` functions were removed in favor of a generic
7217 `from_str` which is available in the prelude.
7218 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
7219 * extra: `dlist`, the doubly-linked list was modernized.
7220 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
7221 * extra: Added `glob` module, replacing `std::os::glob`.
7222 * extra: `rope` was removed.
7223 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
7224 * extra: `net`, and `timer` were removed. The experimental replacements
7225 are `std::rt::io::net` and `std::rt::io::timer`.
7226 * extra: Iterators implemented for `SmallIntMap`.
7227 * extra: Iterators implemented for `Bitv` and `BitvSet`.
7228 * extra: `SmallIntSet` removed. Use `BitvSet`.
7229 * extra: Performance of JSON parsing greatly improved.
7230 * extra: `semver` updated to SemVer 2.0.0.
7231 * extra: `term` handles more terminals correctly.
7232 * extra: `dbg` module removed.
7233 * extra: `par` module removed.
7234 * extra: `future` was cleaned up, with some method renames.
7235 * extra: Most free functions in `getopts` were converted to methods.
7238 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
7239 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
7240 similarly to gcc's `--march` flag.
7241 * rustc's performance compiling small crates is much better.
7242 * rustpkg has received many improvements.
7243 * rustpkg supports git tags as package IDs.
7244 * rustpkg builds into target-specific directories so it can be used for
7246 * The number of concurrent test tasks is controlled by the environment
7247 variable RUST_TEST_TASKS.
7248 * The test harness can now report metrics for benchmarks.
7249 * All tools have man pages.
7250 * Programs compiled with `--test` now support the `-h` and `--help` flags.
7251 * The runtime uses jemalloc for allocations.
7252 * Segmented stacks are temporarily disabled as part of the transition to
7253 the new runtime. Stack overflows are possible!
7254 * A new documentation backend, rustdoc_ng, is available for use. It is
7255 still invoked through the normal `rustdoc` command.
7258 Version 0.7 (2013-07-03)
7259 =======================
7261 * ~2000 changes, numerous bugfixes
7264 * `impl`s no longer accept a visibility qualifier. Put them on methods
7266 * The borrow checker has been rewritten with flow-sensitivity, fixing
7267 many bugs and inconveniences.
7268 * The `self` parameter no longer implicitly means `&'self self`,
7269 and can be explicitly marked with a lifetime.
7270 * Overloadable compound operators (`+=`, etc.) have been temporarily
7271 removed due to bugs.
7272 * The `for` loop protocol now requires `for`-iterators to return `bool`
7273 so they compose better.
7274 * The `Durable` trait is replaced with the `'static` bounds.
7275 * Trait default methods work more often.
7276 * Structs with the `#[packed]` attribute have byte alignment and
7277 no padding between fields.
7278 * Type parameters bound by `Copy` must now be copied explicitly with
7280 * It is now illegal to move out of a dereferenced unsafe pointer.
7281 * `Option<~T>` is now represented as a nullable pointer.
7282 * `@mut` does dynamic borrow checks correctly.
7283 * The `main` function is only detected at the topmost level of the crate.
7284 The `#[main]` attribute is still valid anywhere.
7285 * Struct fields may no longer be mutable. Use inherited mutability.
7286 * The `#[no_send]` attribute makes a type that would otherwise be
7288 * The `#[no_freeze]` attribute makes a type that would otherwise be
7290 * Unbounded recursion will abort the process after reaching the limit
7291 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
7292 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
7293 are never implicitly copyable.
7294 * `#[static_assert]` makes compile-time assertions about static bools.
7295 * At long last, 'argument modes' no longer exist.
7296 * The rarely used `use mod` statement no longer exists.
7299 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
7301 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
7302 `Rand`, `Zero` and `ToStr` can all be automatically derived with
7304 * The `bytes!` macro returns a vector of bytes for string, u8, char,
7305 and unsuffixed integer literals.
7308 * The `core` crate was renamed to `std`.
7309 * The `std` crate was renamed to `extra`.
7310 * More and improved documentation.
7311 * std: `iterator` module for external iterator objects.
7312 * Many old-style (internal, higher-order function) iterators replaced by
7313 implementations of `Iterator`.
7314 * std: Many old internal vector and string iterators,
7315 incl. `any`, `all`. removed.
7316 * std: The `finalize` method of `Drop` renamed to `drop`.
7317 * std: The `drop` method now takes `&mut self` instead of `&self`.
7318 * std: The prelude no longer re-exports any modules, only types and traits.
7319 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
7320 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
7321 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
7322 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
7323 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
7324 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
7325 * std: Many types implement `Clone`.
7326 * std: `path` type renamed to `Path`.
7327 * std: `mut` module and `Mut` type removed.
7328 * std: Many standalone functions removed in favor of methods and iterators
7329 in `vec`, `str`. In the future methods will also work as functions.
7330 * std: `reinterpret_cast` removed. Use `transmute`.
7331 * std: ascii string handling in `std::ascii`.
7332 * std: `Rand` is implemented for ~/@.
7333 * std: `run` module for spawning processes overhauled.
7334 * std: Various atomic types added to `unstable::atomic`.
7335 * std: Various types implement `Zero`.
7336 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
7337 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
7338 * std: Added `os::mkdir_recursive`.
7339 * std: Added `os::glob` function performs filesystems globs.
7340 * std: `FuzzyEq` renamed to `ApproxEq`.
7341 * std: `Map` now defines `pop` and `swap` methods.
7342 * std: `Cell` constructors converted to static methods.
7343 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
7344 * extra: `flate` module moved from `std` to `extra`.
7345 * extra: `fileinput` module for iterating over a series of files.
7346 * extra: `Complex` number type and `complex` module.
7347 * extra: `Rational` number type and `rational` module.
7348 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
7349 * extra: `term` uses terminfo now, is more correct.
7350 * extra: `arc` functions converted to methods.
7351 * extra: Implementation of fixed output size variations of SHA-2.
7354 * `unused_variable` lint mode for unused variables (default: warn).
7355 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
7357 * `unused_mut` lint mode for identifying unused `mut` qualifiers
7359 * `dead_assignment` lint mode for unread variables (default: warn).
7360 * `unnecessary_allocation` lint mode detects some heap allocations that are
7361 immediately borrowed so could be written without allocating (default: warn).
7362 * `missing_doc` lint mode (default: allow).
7363 * `unreachable_code` lint mode (default: warn).
7364 * The `rusti` command has been rewritten and a number of bugs addressed.
7365 * rustc outputs in color on more terminals.
7366 * rustc accepts a `--link-args` flag to pass arguments to the linker.
7367 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
7368 * Compiling with `-g` will make the binary record information about
7369 dynamic borrowcheck failures for debugging.
7370 * rustdoc has a nicer stylesheet.
7371 * Various improvements to rustdoc.
7372 * Improvements to rustpkg (see the detailed release notes).
7375 Version 0.6 (2013-04-03)
7376 ========================
7378 * ~2100 changes, numerous bugfixes
7381 * The self type parameter in traits is now spelled `Self`
7382 * The `self` parameter in trait and impl methods must now be explicitly
7383 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
7384 * Static methods no longer require the `static` keyword and instead
7385 are distinguished by the lack of a `self` parameter
7386 * Replaced the `Durable` trait with the `'static` lifetime
7387 * The old closure type syntax with the trailing sigil has been
7388 removed in favor of the more consistent leading sigil
7389 * `super` is a keyword, and may be prefixed to paths
7390 * Trait bounds are separated with `+` instead of whitespace
7391 * Traits are implemented with `impl Trait for Type`
7392 instead of `impl Type: Trait`
7393 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
7394 * The `export` keyword has finally been removed
7395 * The `move` keyword has been removed (see "Semantic changes")
7396 * The interior mutability qualifier on vectors, `[mut T]`, has been
7397 removed. Use `&mut [T]`, etc.
7398 * `mut` is no longer valid in `~mut T`. Use inherited mutability
7399 * `fail` is no longer a keyword. Use `fail!()`
7400 * `assert` is no longer a keyword. Use `assert!()`
7401 * `log` is no longer a keyword. use `debug!`, etc.
7402 * 1-tuples may be represented as `(T,)`
7403 * Struct fields may no longer be `mut`. Use inherited mutability,
7404 `@mut T`, `core::mut` or `core::cell`
7405 * `extern mod { ... }` is no longer valid syntax for foreign
7406 function modules. Use extern blocks: `extern { ... }`
7407 * Newtype enums removed. Use tuple-structs.
7408 * Trait implementations no longer support visibility modifiers
7409 * Pattern matching over vectors improved and expanded
7410 * `const` renamed to `static` to correspond to lifetime name,
7411 and make room for future `static mut` unsafe mutable globals.
7412 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
7413 * `Clone` implementations can be automatically generated with
7414 `#[deriving(Clone)]`
7415 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
7416 instead of `foo as Bar`.
7417 * Fixed length vector types are now written as `[int, .. 3]`
7418 instead of `[int * 3]`.
7419 * Fixed length vector types can express the length as a constant
7420 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
7423 * Types with owned pointers or custom destructors move by default,
7424 eliminating the `move` keyword
7425 * All foreign functions are considered unsafe
7426 * &mut is now unaliasable
7427 * Writes to borrowed @mut pointers are prevented dynamically
7429 * The name of the main function can be customized using #[main]
7430 * The default type of an inferred closure is &fn instead of @fn
7431 * `use` statements may no longer be "chained" - they cannot import
7432 identifiers imported by previous `use` statements
7433 * `use` statements are crate relative, importing from the "top"
7434 of the crate by default. Paths may be prefixed with `super::`
7435 or `self::` to change the search behavior.
7436 * Method visibility is inherited from the implementation declaration
7437 * Structural records have been removed
7438 * Many more types can be used in static items, including enums
7439 'static-lifetime pointers and vectors
7440 * Pattern matching over vectors improved and expanded
7441 * Typechecking of closure types has been overhauled to
7442 improve inference and eliminate unsoundness
7443 * Macros leave scope at the end of modules, unless that module is
7444 tagged with #[macro_escape]
7447 * Added big integers to `std::bigint`
7448 * Removed `core::oldcomm` module
7449 * Added pipe-based `core::comm` module
7450 * Numeric traits have been reorganized under `core::num`
7451 * `vec::slice` finally returns a slice
7452 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
7453 * Containers reorganized around traits in `core::container`
7454 * `core::dvec` removed, `~[T]` is a drop-in replacement
7455 * `core::send_map` renamed to `core::hashmap`
7456 * `std::map` removed; replaced with `core::hashmap`
7457 * `std::treemap` reimplemented as an owned balanced tree
7458 * `std::deque` and `std::smallintmap` reimplemented as owned containers
7459 * `core::trie` added as a fast ordered map for integer keys
7460 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
7461 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
7462 overload the comparison operators, whereas `TotalOrd` is used
7463 by certain container types
7466 * Replaced the 'cargo' package manager with 'rustpkg'
7467 * Added all-purpose 'rust' tool
7468 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
7469 * rustc now *attempts* to offer spelling suggestions
7470 * Improved support for ARM and Android
7471 * Preliminary MIPS backend
7472 * Improved foreign function ABI implementation for x86, x86_64
7473 * Various memory usage improvements
7474 * Rust code may be embedded in foreign code under limited circumstances
7475 * Inline assembler supported by new asm!() syntax extension.
7478 Version 0.5 (2012-12-21)
7479 ===========================
7481 * ~900 changes, numerous bugfixes
7484 * Removed `<-` move operator
7485 * Completed the transition from the `#fmt` extension syntax to `fmt!`
7486 * Removed old fixed length vector syntax - `[T]/N`
7487 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
7488 * Macros may now expand to items and statements
7489 * `a.b()` is always parsed as a method call, never as a field projection
7490 * `Eq` and `IterBytes` implementations can be automatically generated
7491 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
7492 * Removed the special crate language for `.rc` files
7493 * Function arguments may consist of any irrefutable pattern
7496 * `&` and `~` pointers may point to objects
7497 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
7498 * Enum variants may be structs
7499 * Destructors can be added to all nominal types with the Drop trait
7500 * Structs and nullary enum variants may be constants
7501 * Values that cannot be implicitly copied are now automatically moved
7502 without writing `move` explicitly
7503 * `&T` may now be coerced to `*T`
7504 * Coercions happen in `let` statements as well as function calls
7505 * `use` statements now take crate-relative paths
7506 * The module and type namespaces have been merged so that static
7507 method names can be resolved under the trait in which they are
7510 * Improved support for language features
7511 * Trait inheritance works in many scenarios
7512 * More support for explicit self arguments in methods - `self`, `&self`
7513 `@self`, and `~self` all generally work as expected
7514 * Static methods work in more situations
7515 * Experimental: Traits may declare default methods for the implementations
7519 * New condition handling system in `core::condition`
7520 * Timsort added to `std::sort`
7521 * New priority queue, `std::priority_queue`
7522 * Pipes for serializable types, `std::flatpipes'
7523 * Serialization overhauled to be trait-based
7524 * Expanded `getopts` definitions
7525 * Moved futures to `std`
7526 * More functions are pure now
7527 * `core::comm` renamed to `oldcomm`. Still deprecated
7528 * `rustdoc` and `cargo` are libraries now
7531 * Added a preliminary REPL, `rusti`
7532 * License changed from MIT to dual MIT/APL2
7535 Version 0.4 (2012-10-15)
7536 ==========================
7538 * ~2000 changes, numerous bugfixes
7541 * All keywords are now strict and may not be used as identifiers anywhere
7542 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
7543 'of', 'with', 'to', 'class'.
7544 * Classes are replaced with simpler structs
7545 * Explicit method self types
7546 * `ret` became `return` and `alt` became `match`
7547 * `import` is now `use`; `use is now `extern mod`
7548 * `extern mod { ... }` is now `extern { ... }`
7549 * `use mod` is the recommended way to import modules
7550 * `pub` and `priv` replace deprecated export lists
7551 * The syntax of `match` pattern arms now uses fat arrow (=>)
7552 * `main` no longer accepts an args vector; use `os::args` instead
7555 * Trait implementations are now coherent, ala Haskell typeclasses
7556 * Trait methods may be static
7557 * Argument modes are deprecated
7558 * Borrowed pointers are much more mature and recommended for use
7559 * Strings and vectors in the static region are stored in constant memory
7560 * Typestate was removed
7561 * Resolution rewritten to be more reliable
7562 * Support for 'dual-mode' data structures (freezing and thawing)
7565 * Most binary operators can now be overloaded via the traits in
7567 * `std::net::url` for representing URLs
7568 * Sendable hash maps in `core::send_map`
7569 * `core::task' gained a (currently unsafe) task-local storage API
7572 * An efficient new intertask communication primitive called the pipe,
7573 along with a number of higher-level channel types, in `core::pipes`
7574 * `std::arc`, an atomically reference counted, immutable, shared memory
7576 * `std::sync`, various exotic synchronization tools based on arcs and pipes
7577 * Futures are now based on pipes and sendable
7578 * More robust linked task failure
7579 * Improved task builder API
7582 * Improved error reporting
7583 * Preliminary JIT support
7584 * Preliminary work on precise GC
7585 * Extensive architectural improvements to rustc
7586 * Begun a transition away from buggy C++-based reflection (shape) code to
7587 Rust-based (visitor) code
7588 * All hash functions and tables converted to secure, randomized SipHash
7591 Version 0.3 (2012-07-12)
7592 ========================
7594 * ~1900 changes, numerous bugfixes
7596 * New coding conveniences
7597 * Integer-literal suffix inference
7598 * Per-item control over warnings, errors
7599 * #[cfg(windows)] and #[cfg(unix)] attributes
7600 * Documentation comments
7601 * More compact closure syntax
7602 * 'do' expressions for treating higher-order functions as
7604 * *-patterns (wildcard extended to all constructor fields)
7607 * Name resolution pass and exhaustiveness checker rewritten
7608 * Region pointers and borrow checking supersede alias
7610 * Init-ness checking is now provided by a region-based liveness
7611 pass instead of the typestate pass; same for last-use analysis
7612 * Extensive work on region pointers
7614 * Experimental new language features
7615 * Slices and fixed-size, interior-allocated vectors
7616 * #!-comments for lang versioning, shell execution
7617 * Destructors and iface implementation for classes;
7618 type-parameterized classes and class methods
7619 * 'const' type kind for types that can be used to implement
7620 shared-memory concurrency patterns
7624 * Removal of various obsolete features
7625 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
7626 'crust', 'native' (now 'extern'), 'cont' (now 'again')
7628 * Constructs: do-while loops ('do' repurposed), fn binding,
7629 resources (replaced by destructors)
7631 * Compiler reorganization
7632 * Syntax-layer of compiler split into separate crate
7633 * Clang (from LLVM project) integrated into build
7634 * Typechecker split into sub-modules
7637 * New time functions
7638 * Extension methods for many built-in types
7639 * Arc: atomic-refcount read-only / exclusive-use shared cells
7640 * Par: parallel map and search routines
7641 * Extensive work on libuv interface
7642 * Much vector code moved to libraries
7643 * Syntax extensions: #line, #col, #file, #mod, #stringify,
7644 #include, #include_str, #include_bin
7647 * Cargo automatically resolves dependencies
7650 Version 0.2 (2012-03-29)
7651 =========================
7653 * >1500 changes, numerous bugfixes
7655 * New docs and doc tooling
7657 * New port: FreeBSD x86_64
7659 * Compilation model enhancements
7660 * Generics now specialized, multiply instantiated
7661 * Functions now inlined across separate crates
7663 * Scheduling, stack and threading fixes
7664 * Noticeably improved message-passing performance
7665 * Explicit schedulers
7669 * Experimental new language features
7670 * Operator overloading
7674 * Various language extensions
7675 * C-callback function types: 'crust fn ...'
7676 * Infinite-loop construct: 'loop { ... }'
7677 * Shorten 'mutable' to 'mut'
7678 * Required mutable-local qualifier: 'let mut ...'
7679 * Basic glob-exporting: 'export foo::*;'
7680 * Alt now exhaustive, 'alt check' for runtime-checked
7681 * Block-function form of 'for' loop, with 'break' and 'ret'.
7684 * AST quasi-quote syntax extension
7685 * Revived libuv interface
7686 * New modules: core::{future, iter}, std::arena
7687 * Merged per-platform std::{os*, fs*} to core::{libc, os}
7688 * Extensive cleanup, regularization in libstd, libcore
7691 Version 0.1 (2012-01-20)
7692 ===============================
7694 * Most language features work, including:
7695 * Unique pointers, unique closures, move semantics
7696 * Interface-constrained generics
7697 * Static interface dispatch
7699 * Multithread task scheduling
7700 * Typestate predicates
7701 * Failure unwinding, destructors
7702 * Pattern matching and destructuring assignment
7703 * Lightweight block-lambda syntax
7704 * Preliminary macro-by-example
7706 * Compiler works with the following configurations:
7707 * Linux: x86 and x86_64 hosts and targets
7708 * macOS: x86 and x86_64 hosts and targets
7709 * Windows: x86 hosts and targets
7711 * Cross compilation / multi-target configuration supported.
7713 * Preliminary API-documentation and package-management tools included.
7717 * Documentation is incomplete.
7719 * Performance is below intended target.
7721 * Standard library APIs are subject to extensive change, reorganization.
7723 * Language-level versioning is not yet operational - future code will