1 Version 1.28.0 (2018-08-02)
2 ===========================
6 - [The `#[repr(transparent)]` attribute is now stable.][51562] This attribute
7 allows a Rust newtype wrapper (`struct NewType<T>(T);`) to be represented as
8 the inner type across Foreign Function Interface (FFI) boundaries.
9 - [The keywords `pure`, `sizeof`, `alignof`, and `offsetof` have been unreserved
10 and can now be used as identifiers.][51196]
11 - [The `GlobalAlloc` trait and `#[global_allocator]` attribute are now
12 stable.][51241] This will allow users to specify a global allocator for
14 - [Unit test functions marked with the `#[test]` attribute can now return
15 `Result<(), E: Debug>` in addition to `()`.][51298]
16 - [The `lifetime` specifier for `macro_rules!` is now stable.][50385] This
17 allows macros to easily target lifetimes.
21 - [The `s` and `z` optimisation levels are now stable.][50265] These optimisations
22 prioritise making smaller binary sizes. `z` is the same as `s` with the
23 exception that it does not vectorise loops, which typically results in an even
25 - [The short error format is now stable.][49546] Specified with
26 `--error-format=short` this option will provide a more compressed output of
28 - [Added a lint warning when you have duplicated `macro_export`s.][50143]
29 - [Reduced the number of allocations in the macro parser.][50855] This can
30 improve compile times of macro heavy crates on average by 5%.
34 - [Implemented `Default` for `&mut str`.][51306]
35 - [Implemented `From<bool>` for all integer and unsigned number types.][50554]
36 - [Implemented `Extend` for `()`.][50234]
37 - [The `Debug` implementation of `time::Duration` should now be more easily
38 human readable.][50364] Previously a `Duration` of one second would printed as
39 `Duration { secs: 1, nanos: 0 }` and will now be printed as `1s`.
40 - [Implemented `From<&String>` for `Cow<str>`, `From<&Vec<T>>` for `Cow<[T]>`,
41 `From<Cow<CStr>>` for `CString`, `From<CString>, From<CStr>, From<&CString>`
42 for `Cow<CStr>`, `From<OsString>, From<OsStr>, From<&OsString>` for
43 `Cow<OsStr>`, `From<&PathBuf>` for `Cow<Path>`, and `From<Cow<Path>>`
44 for `PathBuf`.][50170]
45 - [Implemented `Shl` and `Shr` for `Wrapping<u128>`
46 and `Wrapping<i128>`.][50465]
47 - [`DirEntry::metadata` now uses `fstatat` instead of `lstat` when
48 possible.][51050] This can provide up to a 40% speed increase.
49 - [Improved error messages when using `format!`.][50610]
53 - [`Iterator::step_by`]
55 - [`SystemTime::UNIX_EPOCH`]
56 - [`alloc::GlobalAlloc`]
58 - [`alloc::LayoutErr`]
61 - [`alloc::alloc_zeroed`]
64 - [`alloc::handle_alloc_error`]
65 - [`btree_map::Entry::or_default`]
67 - [`hash_map::Entry::or_default`]
68 - [`iter::repeat_with`]
69 - [`num::NonZeroUsize`]
70 - [`num::NonZeroU128`]
75 - [`ops::RangeBounds`]
76 - [`slice::SliceIndex`]
79 - [`{Any + Send + Sync}::downcast_mut`]
80 - [`{Any + Send + Sync}::downcast_ref`]
81 - [`{Any + Send + Sync}::is`]
85 - [Cargo will now no longer allow you to publish crates with build scripts that
86 modify the `src` directory.][cargo/5584] The `src` directory in a crate should be
87 considered to be immutable.
91 - [The `suggestion_applicability` field in `rustc`'s json output is now
92 stable.][50486] This will allow dev tools to check whether a code suggestion
97 - [Rust will consider trait objects with duplicated constraints to be the same
98 type as without the duplicated constraint.][51276] For example the below code will
104 fn test(&self) { println!("one"); } //~ ERROR duplicate definitions with name `test`
107 impl Trait + Send + Send {
108 fn test(&self) { println!("two"); }
112 [49546]: https://github.com/rust-lang/rust/pull/49546/
113 [50143]: https://github.com/rust-lang/rust/pull/50143/
114 [50170]: https://github.com/rust-lang/rust/pull/50170/
115 [50234]: https://github.com/rust-lang/rust/pull/50234/
116 [50265]: https://github.com/rust-lang/rust/pull/50265/
117 [50364]: https://github.com/rust-lang/rust/pull/50364/
118 [50385]: https://github.com/rust-lang/rust/pull/50385/
119 [50465]: https://github.com/rust-lang/rust/pull/50465/
120 [50486]: https://github.com/rust-lang/rust/pull/50486/
121 [50554]: https://github.com/rust-lang/rust/pull/50554/
122 [50610]: https://github.com/rust-lang/rust/pull/50610/
123 [50855]: https://github.com/rust-lang/rust/pull/50855/
124 [51050]: https://github.com/rust-lang/rust/pull/51050/
125 [51196]: https://github.com/rust-lang/rust/pull/51196/
126 [51200]: https://github.com/rust-lang/rust/pull/51200/
127 [51241]: https://github.com/rust-lang/rust/pull/51241/
128 [51276]: https://github.com/rust-lang/rust/pull/51276/
129 [51298]: https://github.com/rust-lang/rust/pull/51298/
130 [51306]: https://github.com/rust-lang/rust/pull/51306/
131 [51562]: https://github.com/rust-lang/rust/pull/51562/
132 [cargo/5584]: https://github.com/rust-lang/cargo/pull/5584/
133 [`Iterator::step_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.step_by
134 [`Path::ancestors`]: https://doc.rust-lang.org/std/path/struct.Path.html#method.ancestors
135 [`SystemTime::UNIX_EPOCH`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#associatedconstant.UNIX_EPOCH
136 [`alloc::GlobalAlloc`]: https://doc.rust-lang.org/std/alloc/trait.GlobalAlloc.html
137 [`alloc::Layout`]: https://doc.rust-lang.org/std/alloc/struct.Layout.html
138 [`alloc::LayoutErr`]: https://doc.rust-lang.org/std/alloc/struct.LayoutErr.html
139 [`alloc::System`]: https://doc.rust-lang.org/std/alloc/struct.System.html
140 [`alloc::alloc`]: https://doc.rust-lang.org/std/alloc/fn.alloc.html
141 [`alloc::alloc_zeroed`]: https://doc.rust-lang.org/std/alloc/fn.alloc_zeroed.html
142 [`alloc::dealloc`]: https://doc.rust-lang.org/std/alloc/fn.dealloc.html
143 [`alloc::realloc`]: https://doc.rust-lang.org/std/alloc/fn.realloc.html
144 [`alloc::handle_alloc_error`]: https://doc.rust-lang.org/std/alloc/fn.handle_alloc_error.html
145 [`btree_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.or_default
146 [`fmt::Alignment`]: https://doc.rust-lang.org/std/fmt/enum.Alignment.html
147 [`hash_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.or_default
148 [`iter::repeat_with`]: https://doc.rust-lang.org/std/iter/fn.repeat_with.html
149 [`num::NonZeroUsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroUsize.html
150 [`num::NonZeroU128`]: https://doc.rust-lang.org/std/num/struct.NonZeroU128.html
151 [`num::NonZeroU16`]: https://doc.rust-lang.org/std/num/struct.NonZeroU16.html
152 [`num::NonZeroU32`]: https://doc.rust-lang.org/std/num/struct.NonZeroU32.html
153 [`num::NonZeroU64`]: https://doc.rust-lang.org/std/num/struct.NonZeroU64.html
154 [`num::NonZeroU8`]: https://doc.rust-lang.org/std/num/struct.NonZeroU8.html
155 [`ops::RangeBounds`]: https://doc.rust-lang.org/std/ops/trait.RangeBounds.html
156 [`slice::SliceIndex`]: https://doc.rust-lang.org/std/slice/trait.SliceIndex.html
157 [`slice::from_mut`]: https://doc.rust-lang.org/std/slice/fn.from_mut.html
158 [`slice::from_ref`]: https://doc.rust-lang.org/std/slice/fn.from_ref.html
159 [`{Any + Send + Sync}::downcast_mut`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_mut-2
160 [`{Any + Send + Sync}::downcast_ref`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_ref-2
161 [`{Any + Send + Sync}::is`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.is-2
163 Version 1.27.2 (2018-07-20)
164 ===========================
169 - The borrow checker was fixed to avoid potential unsoundness when using
170 match ergonomics: [#52213][52213].
172 [52213]: https://github.com/rust-lang/rust/issues/52213
174 Version 1.27.1 (2018-07-10)
175 ===========================
180 - rustdoc would execute plugins in the /tmp/rustdoc/plugins directory
181 when running, which enabled executing code as some other user on a
182 given machine. This release fixes that vulnerability; you can read
183 more about this on the [blog][rustdoc-sec]. The associated CVE is [CVE-2018-1000622].
185 Thank you to Red Hat for responsibily disclosing this vulnerability to us.
190 - The borrow checker was fixed to avoid an additional potential unsoundness when using
191 match ergonomics: [#51415][51415], [#49534][49534].
193 [51415]: https://github.com/rust-lang/rust/issues/51415
194 [49534]: https://github.com/rust-lang/rust/issues/49534
195 [rustdoc-sec]: https://blog.rust-lang.org/2018/07/06/security-advisory-for-rustdoc.html
196 [CVE-2018-1000622]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=%20CVE-2018-1000622
198 Version 1.27.0 (2018-06-21)
199 ==========================
203 - [Removed 'proc' from the reserved keywords list.][49699] This allows `proc` to
204 be used as an identifier.
205 - [The dyn syntax is now available.][49968] This syntax is equivalent to the
206 bare `Trait` syntax, and should make it clearer when being used in tandem with
207 `impl Trait`. Since it is equivalent to the following syntax:
208 `&Trait == &dyn Trait`, `&mut Trait == &mut dyn Trait`, and
209 `Box<Trait> == Box<dyn Trait>`.
210 - [Attributes on generic parameters such as types and lifetimes are
211 now stable.][48851] e.g.
212 `fn foo<#[lifetime_attr] 'a, #[type_attr] T: 'a>() {}`
213 - [The `#[must_use]` attribute can now also be used on functions as well as
214 types.][48925] It provides a lint that by default warns users when the
215 value returned by a function has not been used.
219 - [Added the `armv5te-unknown-linux-musleabi` target.][50423]
223 - [SIMD (Single Instruction Multiple Data) on x86/x86_64 is now stable.][49664]
224 This includes [`arch::x86`] & [`arch::x86_64`] modules which contain
225 SIMD intrinsics, a new macro called `is_x86_feature_detected!`, the
226 `#[target_feature(enable="")]` attribute, and adding `target_feature = ""` to
228 - [A lot of methods for `[u8]`, `f32`, and `f64` previously only available in
229 std are now available in core.][49896]
230 - [The generic `Rhs` type parameter on `ops::{Shl, ShlAssign, Shr}` now defaults
232 - [`std::str::replace` now has the `#[must_use]` attribute][50177] to clarify
233 that the operation isn't done in place.
234 - [`Clone::clone`, `Iterator::collect`, and `ToOwned::to_owned` now have
235 the `#[must_use]` attribute][49533] to warn about unused potentially
236 expensive allocations.
240 - [`DoubleEndedIterator::rfind`]
241 - [`DoubleEndedIterator::rfold`]
242 - [`DoubleEndedIterator::try_rfold`]
243 - [`Duration::from_micros`]
244 - [`Duration::from_nanos`]
245 - [`Duration::subsec_micros`]
246 - [`Duration::subsec_millis`]
247 - [`HashMap::remove_entry`]
248 - [`Iterator::try_fold`]
249 - [`Iterator::try_for_each`]
252 - [`String::replace_range`]
253 - [`Take::set_limit`]
254 - [`hint::unreachable_unchecked`]
255 - [`os::unix::process::parent_id`]
256 - [`ptr::swap_nonoverlapping`]
257 - [`slice::rsplit_mut`]
259 - [`slice::swap_with_slice`]
263 - [`cargo-metadata` now includes `authors`, `categories`, `keywords`,
264 `readme`, and `repository` fields.][cargo/5386]
265 - [`cargo-metadata` now includes a package's `metadata` table.][cargo/5360]
266 - [Added the `--target-dir` optional argument.][cargo/5393] This allows you to specify
267 a different directory than `target` for placing compilation artifacts.
268 - [Cargo will be adding automatic target inference for binaries, benchmarks,
269 examples, and tests in the Rust 2018 edition.][cargo/5335] If your project specifies
270 specific targets e.g. using `[[bin]]` and have other binaries in locations
271 where cargo would infer a binary, Cargo will produce a warning. You can
272 disable this feature ahead of time by setting any of the following `autobins`,
273 `autobenches`, `autoexamples`, `autotests` to false.
274 - [Cargo will now cache compiler information.][cargo/5359] This can be disabled by
275 setting `CARGO_CACHE_RUSTC_INFO=0` in your environment.
279 - [Added “The Rustc book” into the official documentation.][49707]
280 [“The Rustc book”] documents and teaches how to use the rustc compiler.
281 - [All books available on `doc.rust-lang.org` are now searchable.][49623]
285 - [Calling a `CharExt` or `StrExt` method directly on core will no longer
286 work.][49896] e.g. `::core::prelude::v1::StrExt::is_empty("")` will not
287 compile, `"".is_empty()` will still compile.
288 - [`Debug` output on `atomic::{AtomicBool, AtomicIsize, AtomicPtr, AtomicUsize}`
289 will only print the inner type.][48553] e.g.
290 `print!("{:?}", AtomicBool::new(true))` will print `true`
291 not `AtomicBool(true)`.
292 - [The maximum number for `repr(align(N))` is now 2²⁹.][50378] Previously you
293 could enter higher numbers but they were not supported by LLVM. Up to 512MB
294 alignment should cover all use cases.
296 [48553]: https://github.com/rust-lang/rust/pull/48553/
297 [48851]: https://github.com/rust-lang/rust/pull/48851/
298 [48925]: https://github.com/rust-lang/rust/pull/48925/
299 [49533]: https://github.com/rust-lang/rust/pull/49533/
300 [49623]: https://github.com/rust-lang/rust/pull/49623/
301 [49630]: https://github.com/rust-lang/rust/pull/49630/
302 [49664]: https://github.com/rust-lang/rust/pull/49664/
303 [49699]: https://github.com/rust-lang/rust/pull/49699/
304 [49707]: https://github.com/rust-lang/rust/pull/49707/
305 [49719]: https://github.com/rust-lang/rust/pull/49719/
306 [49896]: https://github.com/rust-lang/rust/pull/49896/
307 [49968]: https://github.com/rust-lang/rust/pull/49968/
308 [50177]: https://github.com/rust-lang/rust/pull/50177/
309 [50378]: https://github.com/rust-lang/rust/pull/50378/
310 [50398]: https://github.com/rust-lang/rust/pull/50398/
311 [50423]: https://github.com/rust-lang/rust/pull/50423/
312 [cargo/5203]: https://github.com/rust-lang/cargo/pull/5203/
313 [cargo/5335]: https://github.com/rust-lang/cargo/pull/5335/
314 [cargo/5359]: https://github.com/rust-lang/cargo/pull/5359/
315 [cargo/5360]: https://github.com/rust-lang/cargo/pull/5360/
316 [cargo/5386]: https://github.com/rust-lang/cargo/pull/5386/
317 [cargo/5393]: https://github.com/rust-lang/cargo/pull/5393/
318 [`DoubleEndedIterator::rfind`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfind
319 [`DoubleEndedIterator::rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfold
320 [`DoubleEndedIterator::try_rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.try_rfold
321 [`Duration::from_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_micros
322 [`Duration::from_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_nanos
323 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
324 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
325 [`HashMap::remove_entry`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.remove_entry
326 [`Iterator::try_fold`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_fold
327 [`Iterator::try_for_each`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_for_each
328 [`NonNull::cast`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.cast
329 [`Option::filter`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.filter
330 [`String::replace_range`]: https://doc.rust-lang.org/std/string/struct.String.html#method.replace_range
331 [`Take::set_limit`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.set_limit
332 [`hint::unreachable_unchecked`]: https://doc.rust-lang.org/std/hint/fn.unreachable_unchecked.html
333 [`os::unix::process::parent_id`]: https://doc.rust-lang.org/std/os/unix/process/fn.parent_id.html
334 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
335 [`ptr::swap_nonoverlapping`]: https://doc.rust-lang.org/std/ptr/fn.swap_nonoverlapping.html
336 [`slice::rsplit_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit_mut
337 [`slice::rsplit`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit
338 [`slice::swap_with_slice`]: https://doc.rust-lang.org/std/primitive.slice.html#method.swap_with_slice
339 [`arch::x86_64`]: https://doc.rust-lang.org/std/arch/x86_64/index.html
340 [`arch::x86`]: https://doc.rust-lang.org/std/arch/x86/index.html
341 [“The Rustc book”]: https://doc.rust-lang.org/rustc
344 Version 1.26.2 (2018-06-05)
345 ==========================
350 - [The borrow checker was fixed to avoid unsoundness when using match ergonomics][51117]
352 [51117]: https://github.com/rust-lang/rust/issues/51117
355 Version 1.26.1 (2018-05-29)
356 ==========================
361 - [RLS now works on Windows][50646]
362 - [Rustfmt stopped badly formatting text in some cases][rustfmt/2695]
368 - [`fn main() -> impl Trait` no longer works for non-Termination
370 This reverts an accidental stabilization.
371 - [`NaN > NaN` no longer returns true in const-fn contexts][50812]
372 - [Prohibit using turbofish for `impl Trait` in method arguments][50950]
374 [50646]: https://github.com/rust-lang/rust/issues/50646
375 [50656]: https://github.com/rust-lang/rust/pull/50656
376 [50812]: https://github.com/rust-lang/rust/pull/50812
377 [50950]: https://github.com/rust-lang/rust/issues/50950
378 [rustfmt/2695]: https://github.com/rust-lang-nursery/rustfmt/issues/2695
380 Version 1.26.0 (2018-05-10)
381 ==========================
385 - [Closures now implement `Copy` and/or `Clone` if all captured variables
386 implement either or both traits.][49299]
387 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
388 - [The `'_` lifetime is now stable. The underscore lifetime can be used anywhere where a
389 lifetime can be elided.][49458]
390 - [`impl Trait` is now stable allowing you to have abstract types in returns
391 or in function parameters.][49255] e.g. `fn foo() -> impl Iterator<Item=u8>` or
392 `fn open(path: impl AsRef<Path>)`.
393 - [Pattern matching will now automatically apply dereferences.][49394]
394 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
395 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
396 - [A lot of operations are now available in a const context.][46882] E.g. You
397 can now index into constant arrays, reference and dereference into constants,
398 and use Tuple struct constructors.
399 - [Fixed entry slice patterns are now stable.][48516] e.g.
401 let points = [1, 2, 3, 4];
403 [1, 2, 3, 4] => println!("All points were sequential."),
404 _ => println!("Not all points were sequential."),
411 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
412 - [Fixed exponential projection complexity on nested types.][48296]
413 This can provide up to a ~12% reduction in compile times for certain crates.
414 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
415 to remap path prefixes outputted by the compiler.
416 - [Added `powerpc-unknown-netbsd` target.][48281]
420 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
421 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
422 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
423 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
424 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
425 - [`ascii::escape_default` is now available in libcore.][48735]
426 - [Trailing commas are now supported in std and core macros.][48056]
427 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
428 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
433 - [`*const T::copy_to_nonoverlapping`]
434 - [`*const T::copy_to`]
435 - [`*const T::read_unaligned`]
436 - [`*const T::read_volatile`]
439 - [`*const T::wrapping_add`]
440 - [`*const T::wrapping_sub`]
442 - [`*mut T::copy_to_nonoverlapping`]
443 - [`*mut T::copy_to`]
444 - [`*mut T::read_unaligned`]
445 - [`*mut T::read_volatile`]
447 - [`*mut T::replace`]
450 - [`*mut T::wrapping_add`]
451 - [`*mut T::wrapping_sub`]
452 - [`*mut T::write_bytes`]
453 - [`*mut T::write_unaligned`]
454 - [`*mut T::write_volatile`]
457 - [`FromUtf8Error::as_bytes`]
458 - [`LocalKey::try_with`]
460 - [`btree_map::Entry::and_modify`]
461 - [`fs::read_to_string`]
464 - [`hash_map::Entry::and_modify`]
465 - [`iter::FusedIterator`]
466 - [`ops::RangeInclusive`]
467 - [`ops::RangeToInclusive`]
469 - [`slice::rotate_left`]
470 - [`slice::rotate_right`]
476 - [Cargo will now output path to custom commands when `-v` is
477 passed with `--list`][cargo/5041]
478 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
482 - [The second edition of "The Rust Programming Language" book is now recommended
483 over the first.][48404]
488 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
489 syntax is now invalid.
491 use std::ops::Fn as dyn;
492 fn g(_: Box<dyn(std::fmt::Debug)>) {}
494 - [The result of dereferences are no longer promoted to `'static`.][47408]
498 const PAIR: &(i32, i32) = &(0, 1);
499 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
502 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
503 - [`".e0"` will now no longer parse as `0.0` and will instead cause
505 - [Removed hoedown from rustdoc.][48274]
506 - [Bounds on higher-kinded lifetimes a hard error.][48326]
508 [46882]: https://github.com/rust-lang/rust/pull/46882
509 [47379]: https://github.com/rust-lang/rust/pull/47379
510 [47408]: https://github.com/rust-lang/rust/pull/47408
511 [47813]: https://github.com/rust-lang/rust/pull/47813
512 [48056]: https://github.com/rust-lang/rust/pull/48056
513 [48125]: https://github.com/rust-lang/rust/pull/48125
514 [48166]: https://github.com/rust-lang/rust/pull/48166
515 [48235]: https://github.com/rust-lang/rust/pull/48235
516 [48274]: https://github.com/rust-lang/rust/pull/48274
517 [48281]: https://github.com/rust-lang/rust/pull/48281
518 [48296]: https://github.com/rust-lang/rust/pull/48296
519 [48326]: https://github.com/rust-lang/rust/pull/48326
520 [48359]: https://github.com/rust-lang/rust/pull/48359
521 [48404]: https://github.com/rust-lang/rust/pull/48404
522 [48481]: https://github.com/rust-lang/rust/pull/48481
523 [48516]: https://github.com/rust-lang/rust/pull/48516
524 [48628]: https://github.com/rust-lang/rust/pull/48628
525 [48629]: https://github.com/rust-lang/rust/pull/48629
526 [48657]: https://github.com/rust-lang/rust/pull/48657
527 [48735]: https://github.com/rust-lang/rust/pull/48735
528 [48978]: https://github.com/rust-lang/rust/pull/48978
529 [49101]: https://github.com/rust-lang/rust/pull/49101
530 [49109]: https://github.com/rust-lang/rust/pull/49109
531 [49121]: https://github.com/rust-lang/rust/pull/49121
532 [49162]: https://github.com/rust-lang/rust/pull/49162
533 [49184]: https://github.com/rust-lang/rust/pull/49184
534 [49234]: https://github.com/rust-lang/rust/pull/49234
535 [49255]: https://github.com/rust-lang/rust/pull/49255
536 [49299]: https://github.com/rust-lang/rust/pull/49299
537 [49305]: https://github.com/rust-lang/rust/pull/49305
538 [49394]: https://github.com/rust-lang/rust/pull/49394
539 [49458]: https://github.com/rust-lang/rust/pull/49458
540 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
541 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
542 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
543 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
544 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
545 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
546 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
547 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
548 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
549 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
550 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
551 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
552 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
553 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
554 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
555 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
556 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
557 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
558 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
559 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
560 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
561 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
562 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
563 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
564 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
565 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
566 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
567 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
568 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
569 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
570 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
571 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
572 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
573 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
574 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
575 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
576 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
577 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
578 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
579 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
580 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
581 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
584 Version 1.25.0 (2018-03-29)
585 ==========================
589 - [The `#[repr(align(x))]` attribute is now stable.][47006] [RFC 1358]
590 - [You can now use nested groups of imports.][47948]
591 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
592 - [You can now have `|` at the start of a match arm.][47947] e.g.
600 | Foo::B => println!("AB"),
601 | Foo::C => println!("C"),
608 - [Upgraded to LLVM 6.][47828]
609 - [Added `-C lto=val` option.][47521]
610 - [Added `i586-unknown-linux-musl` target][47282]
614 - [Impl Send for `process::Command` on Unix.][47760]
615 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
616 - [`UnsafeCell::into_inner` is now safe.][47204]
617 - [Implement libstd for CloudABI.][47268]
618 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
619 - [Implement `AsRef<Path>` for Component][46985]
620 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
621 - [Moved `Duration` to libcore.][46666]
625 - [`Location::column`]
628 The following functions can now be used in a constant expression.
629 eg. `static MINUTE: Duration = Duration::from_secs(60);`
630 - [`Duration::new`][47300]
631 - [`Duration::from_secs`][47300]
632 - [`Duration::from_millis`][47300]
636 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
637 - [`cargo new` now defaults to creating a binary crate, instead of a
638 library crate.][cargo/5029]
642 - [Rust by example is now shipped with new releases][46196]
646 - [Deprecated `net::lookup_host`.][47510]
647 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
648 - The borrow checker was sometimes incorrectly permitting overlapping borrows
649 around indexing operations (see [#47349][47349]). This has been fixed (which also
650 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
651 - [Removed deprecated unstable attribute `#[simd]`.][47251]
653 [33903]: https://github.com/rust-lang/rust/pull/33903
654 [47947]: https://github.com/rust-lang/rust/pull/47947
655 [47948]: https://github.com/rust-lang/rust/pull/47948
656 [47760]: https://github.com/rust-lang/rust/pull/47760
657 [47790]: https://github.com/rust-lang/rust/pull/47790
658 [47828]: https://github.com/rust-lang/rust/pull/47828
659 [47398]: https://github.com/rust-lang/rust/pull/47398
660 [47510]: https://github.com/rust-lang/rust/pull/47510
661 [47521]: https://github.com/rust-lang/rust/pull/47521
662 [47204]: https://github.com/rust-lang/rust/pull/47204
663 [47251]: https://github.com/rust-lang/rust/pull/47251
664 [47268]: https://github.com/rust-lang/rust/pull/47268
665 [47282]: https://github.com/rust-lang/rust/pull/47282
666 [47300]: https://github.com/rust-lang/rust/pull/47300
667 [47349]: https://github.com/rust-lang/rust/pull/47349
668 [46931]: https://github.com/rust-lang/rust/pull/46931
669 [46985]: https://github.com/rust-lang/rust/pull/46985
670 [47006]: https://github.com/rust-lang/rust/pull/47006
671 [46830]: https://github.com/rust-lang/rust/pull/46830
672 [46095]: https://github.com/rust-lang/rust/pull/46095
673 [46666]: https://github.com/rust-lang/rust/pull/46666
674 [46196]: https://github.com/rust-lang/rust/pull/46196
675 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
676 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
677 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
678 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
679 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
682 Version 1.24.1 (2018-03-01)
683 ==========================
685 - [Do not abort when unwinding through FFI][48251]
686 - [Emit UTF-16 files for linker arguments on Windows][48318]
687 - [Make the error index generator work again][48308]
688 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
690 [48251]: https://github.com/rust-lang/rust/issues/48251
691 [48308]: https://github.com/rust-lang/rust/issues/48308
692 [48318]: https://github.com/rust-lang/rust/issues/48318
693 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
696 Version 1.24.0 (2018-02-15)
697 ==========================
701 - [External `sysv64` ffi is now available.][46528]
702 eg. `extern "sysv64" fn foo () {}`
706 - [rustc now uses 16 codegen units by default for release builds.][46910]
707 For the fastest builds, utilize `codegen-units=1`.
708 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
709 - [Add `aarch64-unknown-openbsd` support][46760]
713 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
714 improvement in performance in the majority of cases.
715 - [`OsStr`'s `Debug` implementation is now lossless and consistent
716 with Windows.][46798]
717 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
718 - [impl `From<bool>` for `AtomicBool`][46293]
719 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
720 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
721 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
722 - [float::from_bits now just uses transmute.][46012] This provides
723 some optimisations from LLVM.
724 - [Copied `AsciiExt` methods onto `char`][46077]
725 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
726 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
727 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
728 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
732 - [`RefCell::replace`]
734 - [`atomic::spin_loop_hint`]
736 The following functions can now be used in a constant expression.
737 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
739 - [`AtomicBool::new`][46287]
740 - [`AtomicUsize::new`][46287]
741 - [`AtomicIsize::new`][46287]
742 - [`AtomicPtr::new`][46287]
743 - [`Cell::new`][46287]
744 - [`{integer}::min_value`][46287]
745 - [`{integer}::max_value`][46287]
746 - [`mem::size_of`][46287]
747 - [`mem::align_of`][46287]
748 - [`ptr::null`][46287]
749 - [`ptr::null_mut`][46287]
750 - [`RefCell::new`][46287]
751 - [`UnsafeCell::new`][46287]
755 - [Added a `workspace.default-members` config that
756 overrides implied `--all` in virtual workspaces.][cargo/4743]
757 - [Enable incremental by default on development builds.][cargo/4817] Also added
758 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
759 per-project or global basis respectively.
766 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
767 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
768 in accordance with IETF RFC 4291 §2.2.
769 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
770 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
771 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
772 - [Leading zeros in tuple struct members is now an error][47084]
773 - [`column!()` macro is one-based instead of zero-based][46977]
774 - [`fmt::Arguments` can no longer be shared across threads][45198]
775 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
776 - [Cargo sets a different working directory for the compiler][cargo/4788]
778 [44884]: https://github.com/rust-lang/rust/pull/44884
779 [45198]: https://github.com/rust-lang/rust/pull/45198
780 [45506]: https://github.com/rust-lang/rust/pull/45506
781 [45904]: https://github.com/rust-lang/rust/pull/45904
782 [45990]: https://github.com/rust-lang/rust/pull/45990
783 [46012]: https://github.com/rust-lang/rust/pull/46012
784 [46077]: https://github.com/rust-lang/rust/pull/46077
785 [46094]: https://github.com/rust-lang/rust/pull/46094
786 [46284]: https://github.com/rust-lang/rust/pull/46284
787 [46287]: https://github.com/rust-lang/rust/pull/46287
788 [46293]: https://github.com/rust-lang/rust/pull/46293
789 [46528]: https://github.com/rust-lang/rust/pull/46528
790 [46671]: https://github.com/rust-lang/rust/pull/46671
791 [46713]: https://github.com/rust-lang/rust/pull/46713
792 [46735]: https://github.com/rust-lang/rust/pull/46735
793 [46749]: https://github.com/rust-lang/rust/pull/46749
794 [46760]: https://github.com/rust-lang/rust/pull/46760
795 [46798]: https://github.com/rust-lang/rust/pull/46798
796 [46828]: https://github.com/rust-lang/rust/pull/46828
797 [46831]: https://github.com/rust-lang/rust/pull/46831
798 [46833]: https://github.com/rust-lang/rust/pull/46833
799 [46910]: https://github.com/rust-lang/rust/pull/46910
800 [46977]: https://github.com/rust-lang/rust/pull/46977
801 [47018]: https://github.com/rust-lang/rust/pull/47018
802 [47080]: https://github.com/rust-lang/rust/pull/47080
803 [47084]: https://github.com/rust-lang/rust/pull/47084
804 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
805 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
806 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
807 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
808 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
809 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
812 Version 1.23.0 (2018-01-04)
813 ==========================
817 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
818 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
819 Which should fix some confusing errors in some operations.
823 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
824 undefined behaviour.][45920]
825 - [rustc now suggests renaming import if names clash.][45660]
826 - [Display errors/warnings correctly when there are zero-width or
827 wide characters.][45711]
828 - [rustc now avoids unnecessary copies of arguments that are
829 simple bindings][45380] This should improve memory usage on average by 5-10%.
830 - [Updated musl used to build musl rustc to 1.1.17][45393]
834 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
835 - [Implement Hash for raw pointers to unsized types][45483]
836 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
837 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
838 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
839 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
840 and `<*mut T>::as_mut`][44932]
841 - [Optimized `Thread::{park, unpark}` implementation][45524]
842 - [Improved `SliceExt::binary_search` performance.][45333]
843 - [impl `FromIterator<()>` for `()`][45379]
844 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
852 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
853 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
854 - [Added unit test checking to `cargo check`][cargo/4592]
855 - [Cargo now lets you install a specific version
856 using `cargo install --version`][cargo/4637]
860 - [Releases now ship with the Cargo book documentation.][45692]
861 - [rustdoc now prints rendering warnings on every run.][45324]
865 - [Changes have been made to type equality to make it more correct,
866 in rare cases this could break some code.][45853] [Tracking issue for
867 further information][45852]
868 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
869 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
870 Android 9, the minimum supported version is Android 14.
871 - [Bumped the minimum LLVM to 3.9][45326]
873 [44042]: https://github.com/rust-lang/rust/pull/44042
874 [44932]: https://github.com/rust-lang/rust/pull/44932
875 [45267]: https://github.com/rust-lang/rust/pull/45267
876 [45324]: https://github.com/rust-lang/rust/pull/45324
877 [45326]: https://github.com/rust-lang/rust/pull/45326
878 [45333]: https://github.com/rust-lang/rust/pull/45333
879 [45379]: https://github.com/rust-lang/rust/pull/45379
880 [45380]: https://github.com/rust-lang/rust/pull/45380
881 [45393]: https://github.com/rust-lang/rust/pull/45393
882 [45435]: https://github.com/rust-lang/rust/pull/45435
883 [45483]: https://github.com/rust-lang/rust/pull/45483
884 [45524]: https://github.com/rust-lang/rust/pull/45524
885 [45571]: https://github.com/rust-lang/rust/pull/45571
886 [45580]: https://github.com/rust-lang/rust/pull/45580
887 [45610]: https://github.com/rust-lang/rust/pull/45610
888 [45660]: https://github.com/rust-lang/rust/pull/45660
889 [45692]: https://github.com/rust-lang/rust/pull/45692
890 [45711]: https://github.com/rust-lang/rust/pull/45711
891 [45772]: https://github.com/rust-lang/rust/pull/45772
892 [45852]: https://github.com/rust-lang/rust/issues/45852
893 [45853]: https://github.com/rust-lang/rust/pull/45853
894 [45887]: https://github.com/rust-lang/rust/pull/45887
895 [45920]: https://github.com/rust-lang/rust/pull/45920
896 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
897 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
898 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
901 Version 1.22.1 (2017-11-22)
902 ==========================
904 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
906 [46183]: https://github.com/rust-lang/rust/pull/46183
908 Version 1.22.0 (2017-11-22)
909 ==========================
913 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
914 - [Now accepts underscores in unicode escapes][43716]
915 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
916 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
920 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
921 - [rustc will no longer inline in codegen units when compiling for debug][45075]
922 This should decrease compile times for debug builds.
923 - [strict memory alignment now enabled on ARMv6][45094]
924 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
928 - [Allow atomic operations up to 32 bits
929 on `armv5te_unknown_linux_gnueabi`][44978]
930 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
931 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
932 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
933 - [Properly detect overflow in `Instant += Duration`.][44220]
934 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
935 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
936 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
943 - [Cargo will now build multi file examples in subdirectories of the `examples`
944 folder that have a `main.rs` file.][cargo/4496]
945 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
946 the old format will continue to work and can be updated with `cargo update`.
947 - [Now supports vendoring git repositories][cargo/3992]
951 - [`libbacktrace` is now available on Apple platforms.][44251]
952 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
953 This now lets you specify that a given code example will fail to compile.
957 - [The minimum Android version that rustc can build for has been bumped
958 to `4.0` from `2.3`][45656]
959 - [Allowing `T op= &T` for numeric types has broken some type
960 inference cases][45480]
963 [42526]: https://github.com/rust-lang/rust/pull/42526
964 [43017]: https://github.com/rust-lang/rust/pull/43017
965 [43716]: https://github.com/rust-lang/rust/pull/43716
966 [43949]: https://github.com/rust-lang/rust/pull/43949
967 [44015]: https://github.com/rust-lang/rust/pull/44015
968 [44220]: https://github.com/rust-lang/rust/pull/44220
969 [44251]: https://github.com/rust-lang/rust/pull/44251
970 [44287]: https://github.com/rust-lang/rust/pull/44287
971 [44303]: https://github.com/rust-lang/rust/pull/44303
972 [44456]: https://github.com/rust-lang/rust/pull/44456
973 [44466]: https://github.com/rust-lang/rust/pull/44466
974 [44895]: https://github.com/rust-lang/rust/pull/44895
975 [44966]: https://github.com/rust-lang/rust/pull/44966
976 [44978]: https://github.com/rust-lang/rust/pull/44978
977 [45041]: https://github.com/rust-lang/rust/pull/45041
978 [45064]: https://github.com/rust-lang/rust/pull/45064
979 [45075]: https://github.com/rust-lang/rust/pull/45075
980 [45094]: https://github.com/rust-lang/rust/pull/45094
981 [45095]: https://github.com/rust-lang/rust/pull/45095
982 [45480]: https://github.com/rust-lang/rust/issues/45480
983 [45656]: https://github.com/rust-lang/rust/pull/45656
984 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
985 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
986 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
993 Version 1.21.0 (2017-10-12)
994 ==========================
998 - [You can now use static references for literals.][43838]
1002 let x: &'static u32 = &0;
1005 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
1008 my_macro!(Vec<i32>::new); // Always worked
1009 my_macro!(Vec::<i32>::new); // Now works
1014 - [Upgraded jemalloc to 4.5.0][43911]
1015 - [Enabled unwinding panics on Redox][43917]
1016 - [Now runs LLVM in parallel during translation phase.][43506]
1017 This should reduce peak memory usage.
1021 - [Generate builtin impls for `Clone` for all arrays and tuples that
1022 are `T: Clone`][43690]
1023 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
1024 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
1025 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
1030 [`std::mem::discriminant`]
1034 - [You can now call `cargo install` with multiple package names][cargo/4216]
1035 - [Cargo commands inside a virtual workspace will now implicitly
1036 pass `--all`][cargo/4335]
1037 - [Added a `[patch]` section to `Cargo.toml` to handle
1038 prepublication dependencies][cargo/4123] [RFC 1969]
1039 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
1040 like patterns][cargo/4270]
1041 - [Added the `--all-targets` option][cargo/4400]
1042 - [Using required dependencies as a feature is now deprecated and emits
1043 a warning][cargo/4364]
1048 - [Cargo docs are moving][43916]
1049 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
1050 - [The rustdoc book is now available][43863]
1051 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
1052 - [Added a preview of RLS has been made available through rustup][44204]
1053 Install with `rustup component add rls-preview`
1054 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
1055 Previously only showed `std::os::unix`.
1059 - [Changes in method matching against higher-ranked types][43880] This may cause
1060 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
1061 - [rustc's JSON error output's byte position start at top of file.][42973]
1062 Was previously relative to the rustc's internal `CodeMap` struct which
1063 required the unstable library `libsyntax` to correctly use.
1064 - [`unused_results` lint no longer ignores booleans][43728]
1066 [42565]: https://github.com/rust-lang/rust/pull/42565
1067 [42973]: https://github.com/rust-lang/rust/pull/42973
1068 [43348]: https://github.com/rust-lang/rust/pull/43348
1069 [43459]: https://github.com/rust-lang/rust/pull/43459
1070 [43506]: https://github.com/rust-lang/rust/pull/43506
1071 [43540]: https://github.com/rust-lang/rust/pull/43540
1072 [43690]: https://github.com/rust-lang/rust/pull/43690
1073 [43728]: https://github.com/rust-lang/rust/pull/43728
1074 [43838]: https://github.com/rust-lang/rust/pull/43838
1075 [43863]: https://github.com/rust-lang/rust/pull/43863
1076 [43880]: https://github.com/rust-lang/rust/pull/43880
1077 [43911]: https://github.com/rust-lang/rust/pull/43911
1078 [43916]: https://github.com/rust-lang/rust/pull/43916
1079 [43917]: https://github.com/rust-lang/rust/pull/43917
1080 [44204]: https://github.com/rust-lang/rust/pull/44204
1081 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
1082 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
1083 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1084 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
1085 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
1086 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
1087 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
1088 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
1089 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
1091 Version 1.20.0 (2017-08-31)
1092 ===========================
1096 - [Associated constants are now stabilised.][42809]
1097 - [A lot of macro bugs are now fixed.][42913]
1102 - [Struct fields are now properly coerced to the expected field type.][42807]
1103 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
1104 `wasm32-experimental-emscripten` target.
1105 - [Changed some of the error messages to be more helpful.][42033]
1106 - [Add support for RELRO(RELocation Read-Only) for platforms that support
1108 - [rustc now reports the total number of errors on compilation failure][43015]
1109 previously this was only the number of errors in the pass that failed.
1110 - [Expansion in rustc has been sped up 29x.][42533]
1111 - [added `msp430-none-elf` target.][43099]
1112 - [rustc will now suggest one-argument enum variant to fix type mismatch when
1114 - [Fixes backtraces on Redox][43228]
1115 - [rustc now identifies different versions of same crate when absolute paths of
1116 different types match in an error message.][42826]
1122 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
1123 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
1125 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
1126 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
1127 - [Impl `Clone` for `DefaultHasher`.][42799]
1128 - [Impl `Sync` for `SyncSender`.][42397]
1129 - [Impl `FromStr` for `char`][42271]
1130 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
1132 - [allow messages in the `unimplemented!()` macro.][42155]
1133 ie. `unimplemented!("Waiting for 1.21 to be stable")`
1134 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
1135 - [Upgrade to Unicode 10.0.0][42999]
1136 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
1137 - [Skip the main thread's manual stack guard on Linux][43072]
1138 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
1139 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
1141 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
1146 - [`CStr::into_c_string`]
1147 - [`CString::as_c_str`]
1148 - [`CString::into_boxed_c_str`]
1149 - [`Chain::get_mut`]
1150 - [`Chain::get_ref`]
1151 - [`Chain::into_inner`]
1152 - [`Option::get_or_insert_with`]
1153 - [`Option::get_or_insert`]
1154 - [`OsStr::into_os_string`]
1155 - [`OsString::into_boxed_os_str`]
1158 - [`Utf8Error::error_len`]
1159 - [`char::EscapeDebug`]
1160 - [`char::escape_debug`]
1161 - [`compile_error!`]
1162 - [`f32::from_bits`]
1164 - [`f64::from_bits`]
1166 - [`mem::ManuallyDrop`]
1167 - [`slice::sort_unstable_by_key`]
1168 - [`slice::sort_unstable_by`]
1169 - [`slice::sort_unstable`]
1170 - [`str::from_boxed_utf8_unchecked`]
1171 - [`str::as_bytes_mut`]
1172 - [`str::as_bytes_mut`]
1173 - [`str::from_utf8_mut`]
1174 - [`str::from_utf8_unchecked_mut`]
1176 - [`str::get_unchecked_mut`]
1177 - [`str::get_unchecked`]
1179 - [`str::into_boxed_bytes`]
1184 - [Cargo API token location moved from `~/.cargo/config` to
1185 `~/.cargo/credentials`.][cargo/3978]
1186 - [Cargo will now build `main.rs` binaries that are in sub-directories of
1187 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
1188 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
1189 - [You can now specify version of a binary when installed through
1190 `cargo install` using `--vers`.][cargo/4229]
1191 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
1192 failure.][cargo/4248]
1193 - [Changed the convention around which file is the crate root.][cargo/4259]
1194 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
1195 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
1200 - [Functions with `'static` in their return types will now not be as usable as
1201 if they were using lifetime parameters instead.][42417]
1202 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
1203 takes the sign of NaN into account where previously didn't.][42430]
1205 [42033]: https://github.com/rust-lang/rust/pull/42033
1206 [42155]: https://github.com/rust-lang/rust/pull/42155
1207 [42271]: https://github.com/rust-lang/rust/pull/42271
1208 [42397]: https://github.com/rust-lang/rust/pull/42397
1209 [42417]: https://github.com/rust-lang/rust/pull/42417
1210 [42430]: https://github.com/rust-lang/rust/pull/42430
1211 [42431]: https://github.com/rust-lang/rust/pull/42431
1212 [42533]: https://github.com/rust-lang/rust/pull/42533
1213 [42571]: https://github.com/rust-lang/rust/pull/42571
1214 [42613]: https://github.com/rust-lang/rust/pull/42613
1215 [42799]: https://github.com/rust-lang/rust/pull/42799
1216 [42807]: https://github.com/rust-lang/rust/pull/42807
1217 [42809]: https://github.com/rust-lang/rust/pull/42809
1218 [42822]: https://github.com/rust-lang/rust/pull/42822
1219 [42826]: https://github.com/rust-lang/rust/pull/42826
1220 [42854]: https://github.com/rust-lang/rust/pull/42854
1221 [42913]: https://github.com/rust-lang/rust/pull/42913
1222 [42999]: https://github.com/rust-lang/rust/pull/42999
1223 [43011]: https://github.com/rust-lang/rust/pull/43011
1224 [43015]: https://github.com/rust-lang/rust/pull/43015
1225 [43072]: https://github.com/rust-lang/rust/pull/43072
1226 [43077]: https://github.com/rust-lang/rust/pull/43077
1227 [43097]: https://github.com/rust-lang/rust/pull/43097
1228 [43099]: https://github.com/rust-lang/rust/pull/43099
1229 [43170]: https://github.com/rust-lang/rust/pull/43170
1230 [43178]: https://github.com/rust-lang/rust/pull/43178
1231 [43185]: https://github.com/rust-lang/rust/pull/43185
1232 [43228]: https://github.com/rust-lang/rust/pull/43228
1233 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
1234 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
1235 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
1236 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
1237 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
1238 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1239 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
1240 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
1241 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
1242 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
1243 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
1244 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
1245 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
1246 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
1247 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
1248 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
1249 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
1250 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
1251 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
1252 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
1253 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
1254 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
1255 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
1256 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
1257 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
1258 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
1259 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
1260 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
1261 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
1262 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
1263 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
1264 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
1265 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
1266 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
1267 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
1268 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
1269 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
1270 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
1271 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
1274 Version 1.19.0 (2017-07-20)
1275 ===========================
1280 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
1281 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
1282 - [Macro recursion limit increased to 1024 from 64.][41676]
1283 - [Added lint for detecting unused macros.][41907]
1284 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
1285 For example: `let x = loop { break 7; };`
1286 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
1287 contain `Copy` types and cannot have a `Drop` implementation.
1288 Example: `union Foo { bar: u8, baz: usize }`
1289 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
1290 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
1295 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
1296 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
1297 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
1298 you should use `--target armv7-linux-androideabi`.
1299 - [Fixed ICE when removing a source file between compilation sessions.][41873]
1300 - [Minor optimisation of string operations.][42037]
1301 - [Compiler error message is now `aborting due to previous error(s)` instead of
1302 `aborting due to N previous errors`][42150] This was previously inaccurate and
1303 would only count certain kinds of errors.
1304 - [The compiler now supports Visual Studio 2017][42225]
1305 - [The compiler is now built against LLVM 4.0.1 by default][42948]
1306 - [Added a lot][42264] of [new error codes][42302]
1307 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
1308 libraries with C Run-time Libraries(CRT) to be statically linked.
1309 - [Fixed various ARM codegen bugs][42740]
1314 - [`String` now implements `FromIterator<Cow<'a, str>>` and
1315 `Extend<Cow<'a, str>>`][41449]
1316 - [`Vec` now implements `From<&mut [T]>`][41530]
1317 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
1318 - [`SplitWhitespace` now implements `Clone`][41659]
1319 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
1321 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
1322 macros, but for printing to stderr.
1327 - [`OsString::shrink_to_fit`]
1330 - [`thread::ThreadId`]
1335 - [Build scripts can now add environment variables to the environment
1336 the crate is being compiled in.
1337 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
1338 - [Subcommands now replace the current process rather than spawning a new
1339 child process][cargo/3970]
1340 - [Workspace members can now accept glob file patterns][cargo/3979]
1341 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
1342 the members in a given workspace.][cargo/3988]
1343 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
1344 - [Target directory path is now in the cargo metadata][cargo/4022]
1345 - [Cargo no longer checks out a local working directory for the
1346 crates.io index][cargo/4026] This should provide smaller file size for the
1347 registry, and improve cloning times, especially on Windows machines.
1348 - [Added an `--exclude` option for excluding certain packages when using the
1349 `--all` option][cargo/4031]
1350 - [Cargo will now automatically retry when receiving a 5xx error
1351 from crates.io][cargo/4032]
1352 - [The `--features` option now accepts multiple comma or space
1353 delimited values.][cargo/4084]
1354 - [Added support for custom target specific runners][cargo/3954]
1359 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
1361 - [Rust will now release XZ compressed packages][rust-installer/57]
1362 - [rustup will now prefer to download rust packages with
1363 XZ compression][rustup/1100] over GZip packages.
1364 - [Added the ability to escape `#` in rust documentation][41785] By adding
1365 additional `#`'s ie. `##` is now `#`
1370 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
1371 - [`-Z` flags are now no longer allowed to be used on the stable
1372 compiler.][41751] This has been a warning for a year previous to this.
1373 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
1374 longer works][42844]. Users should migrate to the built-in `check`
1375 command, which has been available since 1.16.
1376 - [Ending a float literal with `._` is now a hard error.
1377 Example: `42._` .][41946]
1378 - [Any use of a private `extern crate` outside of its module is now a
1379 hard error.][36886] This was previously a warning.
1380 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
1381 relative while the `::` prefix makes a path absolute, but was ignored and the
1382 path was relative regardless.
1383 - [Floating point constants in match patterns is now a hard error][36890]
1384 This was previously a warning.
1385 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
1386 match patterns is now a hard error][36891] This was previously a warning.
1387 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
1389 - [From the pound escape, lines consisting of multiple `#`s are
1391 - [It is an error to re-export private enum variants][42460]. This is
1392 known to break a number of crates that depend on an older version of
1394 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
1395 to use it to find the linker, and the build will fail where it did
1396 not previously][42607]
1398 [36886]: https://github.com/rust-lang/rust/issues/36886
1399 [36888]: https://github.com/rust-lang/rust/issues/36888
1400 [36890]: https://github.com/rust-lang/rust/issues/36890
1401 [36891]: https://github.com/rust-lang/rust/issues/36891
1402 [36892]: https://github.com/rust-lang/rust/issues/36892
1403 [37406]: https://github.com/rust-lang/rust/issues/37406
1404 [39983]: https://github.com/rust-lang/rust/pull/39983
1405 [41145]: https://github.com/rust-lang/rust/pull/41145
1406 [41192]: https://github.com/rust-lang/rust/pull/41192
1407 [41258]: https://github.com/rust-lang/rust/pull/41258
1408 [41370]: https://github.com/rust-lang/rust/pull/41370
1409 [41449]: https://github.com/rust-lang/rust/pull/41449
1410 [41530]: https://github.com/rust-lang/rust/pull/41530
1411 [41624]: https://github.com/rust-lang/rust/pull/41624
1412 [41656]: https://github.com/rust-lang/rust/pull/41656
1413 [41659]: https://github.com/rust-lang/rust/pull/41659
1414 [41676]: https://github.com/rust-lang/rust/pull/41676
1415 [41751]: https://github.com/rust-lang/rust/pull/41751
1416 [41764]: https://github.com/rust-lang/rust/pull/41764
1417 [41785]: https://github.com/rust-lang/rust/pull/41785
1418 [41873]: https://github.com/rust-lang/rust/pull/41873
1419 [41907]: https://github.com/rust-lang/rust/pull/41907
1420 [41946]: https://github.com/rust-lang/rust/pull/41946
1421 [42016]: https://github.com/rust-lang/rust/pull/42016
1422 [42037]: https://github.com/rust-lang/rust/pull/42037
1423 [42068]: https://github.com/rust-lang/rust/pull/42068
1424 [42150]: https://github.com/rust-lang/rust/pull/42150
1425 [42162]: https://github.com/rust-lang/rust/pull/42162
1426 [42225]: https://github.com/rust-lang/rust/pull/42225
1427 [42264]: https://github.com/rust-lang/rust/pull/42264
1428 [42302]: https://github.com/rust-lang/rust/pull/42302
1429 [42460]: https://github.com/rust-lang/rust/issues/42460
1430 [42607]: https://github.com/rust-lang/rust/issues/42607
1431 [42740]: https://github.com/rust-lang/rust/pull/42740
1432 [42844]: https://github.com/rust-lang/rust/issues/42844
1433 [42948]: https://github.com/rust-lang/rust/pull/42948
1434 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
1435 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
1436 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
1437 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
1438 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
1439 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
1440 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
1441 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
1442 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
1443 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
1444 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
1445 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
1446 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
1447 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
1448 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
1449 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
1450 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
1451 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
1452 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
1453 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
1454 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
1455 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
1458 Version 1.18.0 (2017-06-08)
1459 ===========================
1464 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
1465 make the item visible to just that module tree. Also accepts the keyword
1466 `crate` to make something public to the whole crate but not users of the
1467 library. Example: `pub(crate) mod utils;`. [RFC 1422].
1468 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
1469 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
1470 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
1471 types like `Write + Send`, trailing `+` are now supported in trait objects,
1472 and better error reporting for trait objects starting with `?Sized`.
1473 - [0e+10 is now a valid floating point literal][40589]
1474 - [Now warns if you bind a lifetime parameter to 'static][40734]
1475 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
1476 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
1477 representation in some cases.][40377]
1482 - [rustc can now emit mir with `--emit mir`][39891]
1483 - [Improved LLVM IR for trivial functions][40367]
1484 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
1485 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
1486 opportunities found through profiling
1487 - [Improved backtrace formatting when panicking][38165]
1492 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
1493 iterator hasn't been advanced the original `Vec` is reassembled with no actual
1494 iteration or reallocation.
1495 - [Simplified HashMap Bucket interface][40561] provides performance
1496 improvements for iterating and cloning.
1497 - [Specialize Vec::from_elem to use calloc][40409]
1498 - [Fixed Race condition in fs::create_dir_all][39799]
1499 - [No longer caching stdio on Windows][40516]
1500 - [Optimized insertion sort in slice][40807] insertion sort in some cases
1501 2.50%~ faster and in one case now 12.50% faster.
1502 - [Optimized `AtomicBool::fetch_nand`][41143]
1507 - [`Child::try_wait`]
1508 - [`HashMap::retain`]
1509 - [`HashSet::retain`]
1511 - [`TcpStream::peek`]
1512 - [`UdpSocket::peek`]
1513 - [`UdpSocket::peek_from`]
1518 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
1519 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
1520 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
1521 - [Added Android build support][cargo/3885]
1522 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
1523 of a certain type, for example `cargo build --bins` will build all
1525 - [Added support for haiku][cargo/3952]
1530 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
1531 - [Added rust-windbg script for better debugging on Windows][39983]
1532 - [Rust now uses the official cross compiler for NetBSD][40612]
1533 - [rustdoc now accepts `#` at the start of files][40828]
1534 - [Fixed jemalloc support for musl][41168]
1539 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
1540 always placed after the sign if it exists and before the digits. With the `#`
1541 flag the zeroes are placed after the prefix and before the digits.
1542 - [Due to the struct field optimisation][40377], using `transmute` on structs
1543 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
1544 always been undefined behavior, but is now more likely to break in practice.
1545 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
1546 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
1547 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
1548 - [Overlapping inherent `impl`s are now a hard error][40728]
1549 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
1550 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
1551 `out.asm` and `out.ll` instead of only one of the filetypes.
1552 - [ calling a function that returns `Self` will no longer work][41805] when
1553 the size of `Self` cannot be statically determined.
1554 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
1555 this has caused a few regressions namely:
1557 - Changed the link order of local static/dynamic libraries (respecting the
1558 order on given rather than having the compiler reorder).
1559 - Changed how MinGW is linked, native code linked to dynamic libraries
1560 may require manually linking to the gcc support library (for the native
1563 [38165]: https://github.com/rust-lang/rust/pull/38165
1564 [39799]: https://github.com/rust-lang/rust/pull/39799
1565 [39891]: https://github.com/rust-lang/rust/pull/39891
1566 [39983]: https://github.com/rust-lang/rust/pull/39983
1567 [40043]: https://github.com/rust-lang/rust/pull/40043
1568 [40241]: https://github.com/rust-lang/rust/pull/40241
1569 [40338]: https://github.com/rust-lang/rust/pull/40338
1570 [40367]: https://github.com/rust-lang/rust/pull/40367
1571 [40377]: https://github.com/rust-lang/rust/pull/40377
1572 [40409]: https://github.com/rust-lang/rust/pull/40409
1573 [40516]: https://github.com/rust-lang/rust/pull/40516
1574 [40556]: https://github.com/rust-lang/rust/pull/40556
1575 [40561]: https://github.com/rust-lang/rust/pull/40561
1576 [40589]: https://github.com/rust-lang/rust/pull/40589
1577 [40612]: https://github.com/rust-lang/rust/pull/40612
1578 [40723]: https://github.com/rust-lang/rust/pull/40723
1579 [40728]: https://github.com/rust-lang/rust/pull/40728
1580 [40731]: https://github.com/rust-lang/rust/pull/40731
1581 [40734]: https://github.com/rust-lang/rust/pull/40734
1582 [40805]: https://github.com/rust-lang/rust/pull/40805
1583 [40807]: https://github.com/rust-lang/rust/pull/40807
1584 [40828]: https://github.com/rust-lang/rust/pull/40828
1585 [40870]: https://github.com/rust-lang/rust/pull/40870
1586 [41085]: https://github.com/rust-lang/rust/pull/41085
1587 [41143]: https://github.com/rust-lang/rust/pull/41143
1588 [41168]: https://github.com/rust-lang/rust/pull/41168
1589 [41270]: https://github.com/rust-lang/rust/issues/41270
1590 [41469]: https://github.com/rust-lang/rust/pull/41469
1591 [41805]: https://github.com/rust-lang/rust/issues/41805
1592 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
1593 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
1594 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
1595 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
1596 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
1597 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
1598 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
1599 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
1600 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
1601 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
1602 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
1603 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
1604 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
1605 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
1608 Version 1.17.0 (2017-04-27)
1609 ===========================
1614 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
1615 * [Fields of structs may be initialized without duplicating the field/variable
1616 names][39761]. [RFC 1682]
1617 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
1618 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1619 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
1620 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
1621 `'b`. Soundness fix.
1622 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
1623 * [Static variables may contain references to other statics][40027]
1628 * [Exit quickly on only `--emit dep-info`][40336]
1629 * [Make `-C relocation-model` more correctly determine whether the linker
1630 creates a position-independent executable][40245]
1631 * [Add `-C overflow-checks` to directly control whether integer overflow
1633 * [The rustc type checker now checks items on demand instead of in a single
1634 in-order pass][40008]. This is mostly an internal refactoring in support of
1635 future work, including incremental type checking, but also resolves [RFC
1636 1647], allowing `Self` to appear in `impl` `where` clauses.
1637 * [Optimize vtable loads][39995]
1638 * [Turn off vectorization for Emscripten targets][39990]
1639 * [Provide suggestions for unknown macros imported with `use`][39953]
1640 * [Fix ICEs in path resolution][39939]
1641 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
1642 * [Add clearer error message using `&str + &str`][39116]
1653 * [`Ordering::then`]
1654 * [`Ordering::then_with`]
1655 * [`BTreeMap::range`]
1656 * [`BTreeMap::range_mut`]
1657 * [`collections::Bound`]
1658 * [`process::abort`]
1659 * [`ptr::read_unaligned`]
1660 * [`ptr::write_unaligned`]
1661 * [`Result::expect_err`]
1664 * [`Cell::into_inner`]
1670 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
1671 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
1672 * [`String` implements `FromIterator<&char>`][40028]
1673 * `Box` [implements][40009] a number of new conversions:
1674 `From<Box<str>> for String`,
1675 `From<Box<[T]>> for Vec<T>`,
1676 `From<Box<CStr>> for CString`,
1677 `From<Box<OsStr>> for OsString`,
1678 `From<Box<Path>> for PathBuf`,
1679 `Into<Box<str>> for String`,
1680 `Into<Box<[T]>> for Vec<T>`,
1681 `Into<Box<CStr>> for CString`,
1682 `Into<Box<OsStr>> for OsString`,
1683 `Into<Box<Path>> for PathBuf`,
1684 `Default for Box<str>`,
1685 `Default for Box<CStr>`,
1686 `Default for Box<OsStr>`,
1687 `From<&CStr> for Box<CStr>`,
1688 `From<&OsStr> for Box<OsStr>`,
1689 `From<&Path> for Box<Path>`
1690 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
1691 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
1692 * [Slightly optimize `slice::sort`][39538]
1693 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
1694 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
1695 `Box<str>` implements `From<&str>`][39438]
1696 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
1697 `From<(I, u16)> where I: Into<IpAddr>`][39372]
1698 * [`format!` estimates the needed capacity before writing a string][39356]
1699 * [Support unprivileged symlink creation in Windows][38921]
1700 * [`PathBuf` implements `Default`][38764]
1701 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
1702 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
1703 and poor hash functions.
1708 * [Add `cargo check --all`][cargo/3731]
1709 * [Add an option to ignore SSL revocation checking][cargo/3699]
1710 * [Add `cargo run --package`][cargo/3691]
1711 * [Add `required_features`][cargo/3667]
1712 * [Assume `build.rs` is a build script][cargo/3664]
1713 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
1718 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
1720 * [The "Unstable Book" documents nightly-only features][ubook]
1721 * [Improve the style of the sidebar in rustdoc output][40265]
1722 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
1723 * [Fix MSP430 breakage due to `i128`][40257]
1724 * [Preliminary Solaris/SPARCv9 support][39903]
1725 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
1726 run without installing the MSVC runtime.
1727 * [`rustdoc --test` includes file names in test names][39788]
1728 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
1729 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
1730 * [Initial support for `aarch64-unknown-freebsd`][39491]
1731 * [Initial support for `i686-unknown-netbsd`][39426]
1732 * [This release no longer includes the old makefile build system][39431]. Rust
1733 is built with a custom build system, written in Rust, and with Cargo.
1734 * [Add Debug implementations for libcollection structs][39002]
1735 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
1736 * [`--test-threads=0` produces an error][38945]
1737 * [`rustup` installs documentation by default][40526]
1738 * [The Rust source includes NatVis visualizations][39843]. These can be used by
1739 WinDbg and Visual Studio to improve the debugging experience.
1744 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
1745 workaround, either use MSVC 2015 or run vcvars.bat.
1746 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1747 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
1748 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
1750 * [`format!` and `Display::to_string` panic if an underlying formatting
1751 implementation returns an error][40117]. Previously the error was silently
1752 ignored. It is incorrect for `write_fmt` to return an error when writing
1754 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
1755 crates were marked stable and could be accessed from the stable toolchain.
1756 * [Rust git source no longer includes vendored crates][39728]. Those that need
1757 to build with vendored crates should build from release tarballs.
1758 * [Fix inert attributes from `proc_macro_derives`][39572]
1759 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
1760 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
1762 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
1763 existing code generally ignores the type of dead-code unless a type-hint is
1764 provided; this can cause surprising inference interactions particularly around
1765 defaulting. The new code uniformly ignores the result type of dead-code.
1766 * [Tuple-struct constructors with private fields are no longer visible][38932]
1767 * [Lifetime parameters that do not appear in the arguments are now considered
1768 early-bound][38897], resolving a soundness bug (#[32330]). The
1769 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
1771 * [rustdoc: fix doctests with non-feature crate attributes][38161]
1772 * [Make transmuting from fn item types to pointer-sized types a hard
1775 [27787]: https://github.com/rust-lang/rust/issues/27787
1776 [32330]: https://github.com/rust-lang/rust/issues/32330
1777 [34198]: https://github.com/rust-lang/rust/pull/34198
1778 [38161]: https://github.com/rust-lang/rust/pull/38161
1779 [38368]: https://github.com/rust-lang/rust/pull/38368
1780 [38584]: https://github.com/rust-lang/rust/issues/38584
1781 [38661]: https://github.com/rust-lang/rust/pull/38661
1782 [38764]: https://github.com/rust-lang/rust/pull/38764
1783 [38864]: https://github.com/rust-lang/rust/issues/38864
1784 [38897]: https://github.com/rust-lang/rust/pull/38897
1785 [38921]: https://github.com/rust-lang/rust/pull/38921
1786 [38932]: https://github.com/rust-lang/rust/pull/38932
1787 [38945]: https://github.com/rust-lang/rust/pull/38945
1788 [38981]: https://github.com/rust-lang/rust/pull/38981
1789 [39002]: https://github.com/rust-lang/rust/pull/39002
1790 [39116]: https://github.com/rust-lang/rust/pull/39116
1791 [39193]: https://github.com/rust-lang/rust/pull/39193
1792 [39265]: https://github.com/rust-lang/rust/pull/39265
1793 [39356]: https://github.com/rust-lang/rust/pull/39356
1794 [39372]: https://github.com/rust-lang/rust/pull/39372
1795 [39426]: https://github.com/rust-lang/rust/pull/39426
1796 [39431]: https://github.com/rust-lang/rust/pull/39431
1797 [39438]: https://github.com/rust-lang/rust/pull/39438
1798 [39440]: https://github.com/rust-lang/rust/pull/39440
1799 [39485]: https://github.com/rust-lang/rust/pull/39485
1800 [39491]: https://github.com/rust-lang/rust/pull/39491
1801 [39518]: https://github.com/rust-lang/rust/pull/39518
1802 [39538]: https://github.com/rust-lang/rust/pull/39538
1803 [39572]: https://github.com/rust-lang/rust/pull/39572
1804 [39633]: https://github.com/rust-lang/rust/pull/39633
1805 [39642]: https://github.com/rust-lang/rust/pull/39642
1806 [39728]: https://github.com/rust-lang/rust/pull/39728
1807 [39761]: https://github.com/rust-lang/rust/pull/39761
1808 [39788]: https://github.com/rust-lang/rust/pull/39788
1809 [39793]: https://github.com/rust-lang/rust/pull/39793
1810 [39837]: https://github.com/rust-lang/rust/pull/39837
1811 [39843]: https://github.com/rust-lang/rust/pull/39843
1812 [39851]: https://github.com/rust-lang/rust/pull/39851
1813 [39903]: https://github.com/rust-lang/rust/pull/39903
1814 [39939]: https://github.com/rust-lang/rust/pull/39939
1815 [39953]: https://github.com/rust-lang/rust/pull/39953
1816 [39960]: https://github.com/rust-lang/rust/pull/39960
1817 [39990]: https://github.com/rust-lang/rust/pull/39990
1818 [39995]: https://github.com/rust-lang/rust/pull/39995
1819 [40008]: https://github.com/rust-lang/rust/pull/40008
1820 [40009]: https://github.com/rust-lang/rust/pull/40009
1821 [40027]: https://github.com/rust-lang/rust/pull/40027
1822 [40028]: https://github.com/rust-lang/rust/pull/40028
1823 [40037]: https://github.com/rust-lang/rust/pull/40037
1824 [40117]: https://github.com/rust-lang/rust/pull/40117
1825 [40166]: https://github.com/rust-lang/rust/pull/40166
1826 [40245]: https://github.com/rust-lang/rust/pull/40245
1827 [40257]: https://github.com/rust-lang/rust/pull/40257
1828 [40261]: https://github.com/rust-lang/rust/pull/40261
1829 [40265]: https://github.com/rust-lang/rust/pull/40265
1830 [40319]: https://github.com/rust-lang/rust/pull/40319
1831 [40336]: https://github.com/rust-lang/rust/pull/40336
1832 [40526]: https://github.com/rust-lang/rust/pull/40526
1833 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1834 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
1835 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
1836 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
1837 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
1838 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
1839 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
1840 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
1841 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
1842 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
1843 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
1844 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
1845 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
1846 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
1847 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
1848 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
1849 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
1850 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
1851 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
1852 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
1853 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
1854 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
1855 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
1856 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
1857 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
1858 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
1859 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
1860 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
1861 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
1862 [mdbook]: https://crates.io/crates/mdbook
1863 [ubook]: https://doc.rust-lang.org/unstable-book/
1866 Version 1.16.0 (2017-03-16)
1867 ===========================
1872 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1873 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1874 match patterns][38069]
1875 * [Clean up semantics of `self` in an import list][38313]
1876 * [`Self` may appear in `impl` headers][38920]
1877 * [`Self` may appear in struct expressions][39282]
1882 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
1883 a `.rmeta` file containing only crate metadata][38571]. This can be
1884 used by tools like the Rust Language Service to perform
1885 metadata-only builds.
1886 * [Levenshtein based typo suggestions now work in most places, while
1887 previously they worked only for fields and sometimes for local
1888 variables][38927]. Together with the overhaul of "no
1889 resolution"/"unexpected resolution" errors (#[38154]) they result in
1890 large and systematic improvement in resolution diagnostics.
1891 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
1893 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
1894 * [`rustc` no longer attempts to provide "consider using an explicit
1895 lifetime" suggestions][37057]. They were inaccurate.
1900 * [`VecDeque::truncate`]
1901 * [`VecDeque::resize`]
1902 * [`String::insert_str`]
1903 * [`Duration::checked_add`]
1904 * [`Duration::checked_sub`]
1905 * [`Duration::checked_div`]
1906 * [`Duration::checked_mul`]
1909 * [`SocketAddr::is_ipv4`]
1910 * [`SocketAddr::is_ipv6`]
1911 * [`IpAddr::is_ipv4`]
1912 * [`IpAddr::is_ipv6`]
1914 * [`Vec::dedup_by_key`]
1915 * [`Result::unwrap_or_default`]
1916 * [`<*const T>::wrapping_offset`]
1917 * [`<*mut T>::wrapping_offset`]
1918 * `CommandExt::creation_flags`
1919 * [`File::set_permissions`]
1920 * [`String::split_off`]
1925 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
1926 their argument by `Borrow` parameter][37761]
1927 * [All public types in std implement `Debug`][38006]
1928 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
1929 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
1930 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1932 * [std: Fix partial writes in `LineWriter`][38062]
1933 * [std: Clamp max read/write sizes on Unix][38062]
1934 * [Use more specific panic message for `&str` slicing errors][38066]
1935 * [`TcpListener::set_only_v6` is deprecated][38304]. This
1936 functionality cannot be achieved in std currently.
1937 * [`writeln!`, like `println!`, now accepts a form with no string
1938 or formatting arguments, to just print a newline][38469]
1939 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
1940 * [Reduce the size of static data in `std_unicode::tables`][38781]
1941 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
1942 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
1944 * [`Duration` implements `Sum`][38712]
1945 * [`String` implements `ToSocketAddrs`][39048]
1950 * [The `cargo check` command does a type check of a project without
1951 building it][cargo/3296]
1952 * [crates.io will display CI badges from Travis and AppVeyor, if
1953 specified in Cargo.toml][cargo/3546]
1954 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
1955 * [Compilation profiles accept integer values for `debug`, in addition
1956 to `true` and `false`. These are passed to `rustc` as the value to
1957 `-C debuginfo`][cargo/3534]
1958 * [Implement `cargo --version --verbose`][cargo/3604]
1959 * [All builds now output 'dep-info' build dependencies compatible with
1960 make and ninja][cargo/3557]
1961 * [Build all workspace members with `build --all`][cargo/3511]
1962 * [Document all workspace members with `doc --all`][cargo/3515]
1963 * [Path deps outside workspace are not members][cargo/3443]
1968 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
1969 the path to the Rust implementation][38589]
1970 * [The `armv7-linux-androideabi` target no longer enables NEON
1971 extensions, per Google's ABI guide][38413]
1972 * [The stock standard library can be compiled for Redox OS][38401]
1973 * [Rust has initial SPARC support][38726]. Tier 3. No builds
1975 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
1977 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
1982 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1983 match patterns][38069]
1984 * In this release, references to uninhabited types can not be
1985 pattern-matched. This was accidentally allowed in 1.15.
1986 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1987 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1989 * [Clean up semantics of `self` in an import list][38313]
1990 * Reimplemented lifetime elision. This change was almost entirely compatible
1991 with existing code, but it did close a number of small bugs and loopholes,
1992 as well as being more accepting in some other [cases][41105].
1994 [37057]: https://github.com/rust-lang/rust/pull/37057
1995 [37761]: https://github.com/rust-lang/rust/pull/37761
1996 [38006]: https://github.com/rust-lang/rust/pull/38006
1997 [38051]: https://github.com/rust-lang/rust/pull/38051
1998 [38062]: https://github.com/rust-lang/rust/pull/38062
1999 [38062]: https://github.com/rust-lang/rust/pull/38622
2000 [38066]: https://github.com/rust-lang/rust/pull/38066
2001 [38069]: https://github.com/rust-lang/rust/pull/38069
2002 [38131]: https://github.com/rust-lang/rust/pull/38131
2003 [38154]: https://github.com/rust-lang/rust/pull/38154
2004 [38274]: https://github.com/rust-lang/rust/pull/38274
2005 [38304]: https://github.com/rust-lang/rust/pull/38304
2006 [38313]: https://github.com/rust-lang/rust/pull/38313
2007 [38314]: https://github.com/rust-lang/rust/pull/38314
2008 [38327]: https://github.com/rust-lang/rust/pull/38327
2009 [38401]: https://github.com/rust-lang/rust/pull/38401
2010 [38413]: https://github.com/rust-lang/rust/pull/38413
2011 [38469]: https://github.com/rust-lang/rust/pull/38469
2012 [38559]: https://github.com/rust-lang/rust/pull/38559
2013 [38571]: https://github.com/rust-lang/rust/pull/38571
2014 [38580]: https://github.com/rust-lang/rust/pull/38580
2015 [38589]: https://github.com/rust-lang/rust/pull/38589
2016 [38670]: https://github.com/rust-lang/rust/pull/38670
2017 [38712]: https://github.com/rust-lang/rust/pull/38712
2018 [38726]: https://github.com/rust-lang/rust/pull/38726
2019 [38781]: https://github.com/rust-lang/rust/pull/38781
2020 [38798]: https://github.com/rust-lang/rust/pull/38798
2021 [38909]: https://github.com/rust-lang/rust/pull/38909
2022 [38920]: https://github.com/rust-lang/rust/pull/38920
2023 [38927]: https://github.com/rust-lang/rust/pull/38927
2024 [39048]: https://github.com/rust-lang/rust/pull/39048
2025 [39282]: https://github.com/rust-lang/rust/pull/39282
2026 [39379]: https://github.com/rust-lang/rust/pull/39379
2027 [41105]: https://github.com/rust-lang/rust/issues/41105
2028 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2029 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2030 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
2031 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
2032 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
2033 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
2034 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
2035 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
2036 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
2037 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
2038 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
2039 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
2040 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
2041 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
2042 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
2043 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
2044 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
2045 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
2046 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
2047 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
2048 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
2049 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
2050 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
2051 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
2052 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
2053 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
2054 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
2055 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
2056 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
2057 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
2060 Version 1.15.1 (2017-02-09)
2061 ===========================
2063 * [Fix IntoIter::as_mut_slice's signature][39466]
2064 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
2066 [39466]: https://github.com/rust-lang/rust/pull/39466
2067 [39523]: https://github.com/rust-lang/rust/pull/39523
2070 Version 1.15.0 (2017-02-02)
2071 ===========================
2076 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
2077 stable. This allows popular code-generating crates like Serde and Diesel to
2078 work ergonomically. [RFC 1681].
2079 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
2080 with curly braces][36868]. Part of [RFC 1506].
2081 * [A number of minor changes to name resolution have been activated][37127].
2082 They add up to more consistent semantics, allowing for future evolution of
2083 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2084 details of what is different. The breaking changes here have been transitioned
2085 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2086 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
2088 * [`?Sized` can be used in `where` clauses][37791]
2089 * [There is now a limit on the size of monomorphized types and it can be
2090 modified with the `#![type_size_limit]` crate attribute, similarly to
2091 the `#![recursion_limit]` attribute][37789]
2096 * [On Windows, the compiler will apply dllimport attributes when linking to
2097 extern functions][37973]. Additional attributes and flags can control which
2098 library kind is linked and its name. [RFC 1717].
2099 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2100 * [The `--test` flag works with procedural macro crates][38107]
2101 * [Fix `extern "aapcs" fn` ABI][37814]
2102 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
2103 * [The `format!` expander recognizes incorrect `printf` and shell-style
2104 formatting directives and suggests the correct format][37613].
2105 * [Only report one error for all unused imports in an import list][37456]
2107 Compiler Performance
2108 --------------------
2110 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
2111 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
2112 * [Don't clone in `UnificationTable::probe`][37848]
2113 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
2114 * [Use small vectors in type walker][37760]
2115 * [Macro expansion performance was improved][37701]
2116 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
2117 * [Replace FNV with a faster hash function][37229]
2122 * [`std::iter::Iterator::min_by`]
2123 * [`std::iter::Iterator::max_by`]
2124 * [`std::os::*::fs::FileExt`]
2125 * [`std::sync::atomic::Atomic*::get_mut`]
2126 * [`std::sync::atomic::Atomic*::into_inner`]
2127 * [`std::vec::IntoIter::as_slice`]
2128 * [`std::vec::IntoIter::as_mut_slice`]
2129 * [`std::sync::mpsc::Receiver::try_iter`]
2130 * [`std::os::unix::process::CommandExt::before_exec`]
2131 * [`std::rc::Rc::strong_count`]
2132 * [`std::rc::Rc::weak_count`]
2133 * [`std::sync::Arc::strong_count`]
2134 * [`std::sync::Arc::weak_count`]
2135 * [`std::char::encode_utf8`]
2136 * [`std::char::encode_utf16`]
2137 * [`std::cell::Ref::clone`]
2138 * [`std::io::Take::into_inner`]
2143 * [The standard sorting algorithm has been rewritten for dramatic performance
2144 improvements][38192]. It is a hybrid merge sort, drawing influences from
2145 Timsort. Previously it was a naive merge sort.
2146 * [`Iterator::nth` no longer has a `Sized` bound][38134]
2147 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
2149 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
2150 and `char_indices().last()`][37882]
2151 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
2152 * [Chinese characters display correctly in `fmt::Debug`][37855]
2153 * [Derive `Default` for `Duration`][37699]
2154 * [Support creation of anonymous pipes on WinXP/2k][37677]
2155 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
2156 * [Don't pass overlapped handles to processes][38835]
2161 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2162 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2163 should instead check the variable at runtime with `std::env`. That the value
2164 was set at build time was a bug, and incorrect when cross-compiling. This
2165 change is known to cause breakage.
2166 * [Add `--all` flag to `cargo test`][cargo/3221]
2167 * [Compile statically against the MSVC CRT][cargo/3363]
2168 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
2169 * [Link OpenSSL statically on OSX][cargo/3311]
2170 * [Apply new fingerprinting to build dir outputs][cargo/3310]
2171 * [Test for bad path overrides with summaries][cargo/3336]
2172 * [Require `cargo install --vers` to take a semver version][cargo/3338]
2173 * [Fix retrying crate downloads for network errors][cargo/3348]
2174 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
2175 * [Emit more info on --message-format=json][cargo/3319]
2176 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
2177 * [Don't ignore errors in workspace manifest][cargo/3409]
2178 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
2183 * [Test runners (binaries built with `--test`) now support a `--list` argument
2184 that lists the tests it contains][38185]
2185 * [Test runners now support a `--exact` argument that makes the test filter
2186 match exactly, instead of matching only a substring of the test name][38181]
2187 * [rustdoc supports a `--playground-url` flag][37763]
2188 * [rustdoc provides more details about `#[should_panic]` errors][37749]
2193 * [The Rust build system is now written in Rust][37817]. The Makefiles may
2194 continue to be used in this release by passing `--disable-rustbuild` to the
2195 configure script, but they will be deleted soon. Note that the new build
2196 system uses a different on-disk layout that will likely affect any scripts
2198 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
2200 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
2201 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
2207 * [A number of minor changes to name resolution have been activated][37127].
2208 They add up to more consistent semantics, allowing for future evolution of
2209 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2210 details of what is different. The breaking changes here have been transitioned
2211 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2212 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2213 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2214 should instead check the variable at runtime with `std::env`. That the value
2215 was set at build time was a bug, and incorrect when cross-compiling. This
2216 change is known to cause breakage.
2217 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
2218 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
2219 1.10 and is now an error by default. It will become a hard error in the near
2221 * [The semantics relating modules to file system directories are changing in
2222 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
2223 lint, which is a warning in this release, and will become a hard error in the
2225 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2226 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
2227 the underlying iterator][37834]
2229 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
2230 [33685]: https://github.com/rust-lang/rust/issues/33685
2231 [36868]: https://github.com/rust-lang/rust/pull/36868
2232 [37127]: https://github.com/rust-lang/rust/pull/37127
2233 [37229]: https://github.com/rust-lang/rust/pull/37229
2234 [37456]: https://github.com/rust-lang/rust/pull/37456
2235 [37527]: https://github.com/rust-lang/rust/pull/37527
2236 [37602]: https://github.com/rust-lang/rust/pull/37602
2237 [37613]: https://github.com/rust-lang/rust/pull/37613
2238 [37615]: https://github.com/rust-lang/rust/pull/37615
2239 [37636]: https://github.com/rust-lang/rust/pull/37636
2240 [37627]: https://github.com/rust-lang/rust/pull/37627
2241 [37642]: https://github.com/rust-lang/rust/pull/37642
2242 [37677]: https://github.com/rust-lang/rust/pull/37677
2243 [37699]: https://github.com/rust-lang/rust/pull/37699
2244 [37701]: https://github.com/rust-lang/rust/pull/37701
2245 [37705]: https://github.com/rust-lang/rust/pull/37705
2246 [37749]: https://github.com/rust-lang/rust/pull/37749
2247 [37760]: https://github.com/rust-lang/rust/pull/37760
2248 [37763]: https://github.com/rust-lang/rust/pull/37763
2249 [37764]: https://github.com/rust-lang/rust/pull/37764
2250 [37789]: https://github.com/rust-lang/rust/pull/37789
2251 [37791]: https://github.com/rust-lang/rust/pull/37791
2252 [37814]: https://github.com/rust-lang/rust/pull/37814
2253 [37817]: https://github.com/rust-lang/rust/pull/37817
2254 [37834]: https://github.com/rust-lang/rust/pull/37834
2255 [37848]: https://github.com/rust-lang/rust/pull/37848
2256 [37855]: https://github.com/rust-lang/rust/pull/37855
2257 [37882]: https://github.com/rust-lang/rust/pull/37882
2258 [37888]: https://github.com/rust-lang/rust/pull/37888
2259 [37973]: https://github.com/rust-lang/rust/pull/37973
2260 [37979]: https://github.com/rust-lang/rust/pull/37979
2261 [38086]: https://github.com/rust-lang/rust/pull/38086
2262 [38107]: https://github.com/rust-lang/rust/pull/38107
2263 [38117]: https://github.com/rust-lang/rust/pull/38117
2264 [38134]: https://github.com/rust-lang/rust/pull/38134
2265 [38146]: https://github.com/rust-lang/rust/pull/38146
2266 [38181]: https://github.com/rust-lang/rust/pull/38181
2267 [38182]: https://github.com/rust-lang/rust/pull/38182
2268 [38185]: https://github.com/rust-lang/rust/pull/38185
2269 [38192]: https://github.com/rust-lang/rust/pull/38192
2270 [38279]: https://github.com/rust-lang/rust/pull/38279
2271 [38835]: https://github.com/rust-lang/rust/pull/38835
2272 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2273 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2274 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
2275 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
2276 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
2277 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
2278 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
2279 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
2280 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
2281 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
2282 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
2283 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
2284 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
2285 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
2286 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
2287 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
2288 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
2289 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
2290 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
2291 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
2292 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
2293 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
2294 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
2295 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
2296 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
2297 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
2298 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
2299 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
2300 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
2301 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
2302 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
2303 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
2304 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
2305 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
2306 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
2307 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
2308 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
2309 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
2312 Version 1.14.0 (2016-12-22)
2313 ===========================
2318 * [`..` matches multiple tuple fields in enum variants, structs
2319 and tuples][36843]. [RFC 1492].
2320 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
2321 * [`use *` and `use ::*` both glob-import from the crate root][37367]
2322 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
2323 dereferencing][36822]
2328 * [Mark enums with non-zero discriminant as non-zero][37224]
2329 * [Lower-case `static mut` names are linted like other
2330 statics and consts][37162]
2331 * [Fix ICE on some macros in const integer positions
2332 (e.g. `[u8; m!()]`)][36819]
2333 * [Improve error message and snippet for "did you mean `x`"][36798]
2334 * [Add a panic-strategy field to the target specification][36794]
2335 * [Include LLVM version in `--version --verbose`][37200]
2337 Compile-time Optimizations
2338 --------------------------
2340 * [Improve macro expansion performance][37569]
2341 * [Shrink `Expr_::ExprInlineAsm`][37445]
2342 * [Replace all uses of SHA-256 with BLAKE2b][37439]
2343 * [Reduce the number of bytes hashed by `IchHasher`][37427]
2344 * [Avoid more allocations when compiling html5ever][37373]
2345 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
2346 * [Avoid some allocations in the macro parser][37318]
2347 * [Use a faster deflate setting][37298]
2348 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
2349 during interning of slices][37270]
2350 * [Optimize `write_metadata`][37267]
2351 * [Don't process obligation forest cycles when stalled][37231]
2352 * [Avoid many `CrateConfig` clones][37161]
2353 * [Optimize `Substs::super_fold_with`][37108]
2354 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
2355 * [Speed up `plug_leaks`][36917]
2360 * [`println!()`, with no arguments, prints newline][36825].
2361 Previously, an empty string was required to achieve the same.
2362 * [`Wrapping` impls standard binary and unary operators, as well as
2363 the `Sum` and `Product` iterators][37356]
2364 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
2366 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
2367 `VecDeque` iterators][37315]
2368 * [Improve `SipHasher` performance on small values][37312]
2369 * [Add Iterator trait TrustedLen to enable better FromIterator /
2371 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
2372 * [`ReadDir` implements `Debug`][37221]
2373 * [Implement `RefUnwindSafe` for atomic types][37178]
2374 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
2375 * [Avoid allocations in `Decoder::read_str`][37064]
2376 * [`io::Error` implements `From<io::ErrorKind>`][37037]
2377 * [Impl `Debug` for raw pointers to unsized data][36880]
2378 * [Don't reuse `HashMap` random seeds][37470]
2379 * [The internal memory layout of `HashMap` is more cache-friendly, for
2380 significant improvements in some operations][36692]
2381 * [`HashMap` uses less memory on 32-bit architectures][36595]
2382 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
2387 * [Expose rustc cfg values to build scripts][cargo/3243]
2388 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
2389 * [Fix passing --features when testing multiple packages][cargo/3280]
2390 * [Use a single profile set per workspace][cargo/3249]
2391 * [Load `replace` sections from lock files][cargo/3220]
2392 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
2397 * [rustup is the recommended Rust installation method][1.14rustup]
2398 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
2399 S390x. These are [tier 2] platforms and may have major defects. Follow the
2400 instructions on the website to install, or add the targets to an existing
2401 installation with `rustup target add`. The new target triples are:
2402 - `mips-unknown-linux-gnu`
2403 - `mipsel-unknown-linux-gnu`
2404 - `mips64-unknown-linux-gnuabi64`
2405 - `mips64el-unknown-linux-gnuabi64 `
2406 - `powerpc-unknown-linux-gnu`
2407 - `powerpc64-unknown-linux-gnu`
2408 - `powerpc64le-unknown-linux-gnu`
2409 - `s390x-unknown-linux-gnu `
2410 * This release includes target (std) builds for ARM Linux running MUSL
2411 libc. These are [tier 2] platforms and may have major defects. Add the
2412 following triples to an existing rustup installation with `rustup target add`:
2413 - `arm-unknown-linux-musleabi`
2414 - `arm-unknown-linux-musleabihf`
2415 - `armv7-unknown-linux-musleabihf`
2416 * This release includes [experimental support for WebAssembly][1.14wasm], via
2417 the `wasm32-unknown-emscripten` target. This target is known to have major
2418 defects. Please test, report, and fix.
2419 * rustup no longer installs documentation by default. Run `rustup
2420 component add rust-docs` to install.
2421 * [Fix line stepping in debugger][37310]
2422 * [Enable line number debuginfo in releases][37280]
2427 * [Disable jemalloc on aarch64/powerpc/mips][37392]
2428 * [Add support for Fuchsia OS][37313]
2429 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
2434 * [A number of forward-compatibility lints used by the compiler
2435 to gradually introduce language changes have been converted
2436 to deny by default][36894]:
2437 - ["use of inaccessible extern crate erroneously allowed"][36886]
2438 - ["type parameter default erroneously allowed in invalid location"][36887]
2439 - ["detects super or self keywords at the beginning of global path"][36888]
2440 - ["two overlapping inherent impls define an item with the same name
2441 were erroneously allowed"][36889]
2442 - ["floating-point constants cannot be used in patterns"][36890]
2443 - ["constants of struct or enum type can only be used in a pattern if
2444 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
2445 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
2446 * [Prohibit patterns in trait methods without bodies][37378]
2447 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
2448 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
2449 * [The `$crate` macro variable is accepted in fewer locations][37213]
2450 * [Impls specifying extra region requirements beyond the trait
2451 they implement are rejected][37167]
2452 * [Enums may not be unsized][37111]. Unsized enums are intended to
2453 work but never have. For now they are forbidden.
2454 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
2456 [tier 2]: https://forge.rust-lang.org/platform-support.html
2457 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
2458 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
2459 [36430]: https://github.com/rust-lang/rust/pull/36430
2460 [36595]: https://github.com/rust-lang/rust/pull/36595
2461 [36595]: https://github.com/rust-lang/rust/pull/36595
2462 [36692]: https://github.com/rust-lang/rust/pull/36692
2463 [36767]: https://github.com/rust-lang/rust/pull/36767
2464 [36794]: https://github.com/rust-lang/rust/pull/36794
2465 [36798]: https://github.com/rust-lang/rust/pull/36798
2466 [36819]: https://github.com/rust-lang/rust/pull/36819
2467 [36822]: https://github.com/rust-lang/rust/pull/36822
2468 [36825]: https://github.com/rust-lang/rust/pull/36825
2469 [36843]: https://github.com/rust-lang/rust/pull/36843
2470 [36880]: https://github.com/rust-lang/rust/pull/36880
2471 [36886]: https://github.com/rust-lang/rust/issues/36886
2472 [36887]: https://github.com/rust-lang/rust/issues/36887
2473 [36888]: https://github.com/rust-lang/rust/issues/36888
2474 [36889]: https://github.com/rust-lang/rust/issues/36889
2475 [36890]: https://github.com/rust-lang/rust/issues/36890
2476 [36891]: https://github.com/rust-lang/rust/issues/36891
2477 [36892]: https://github.com/rust-lang/rust/issues/36892
2478 [36894]: https://github.com/rust-lang/rust/pull/36894
2479 [36917]: https://github.com/rust-lang/rust/pull/36917
2480 [36993]: https://github.com/rust-lang/rust/pull/36993
2481 [37037]: https://github.com/rust-lang/rust/pull/37037
2482 [37064]: https://github.com/rust-lang/rust/pull/37064
2483 [37094]: https://github.com/rust-lang/rust/pull/37094
2484 [37108]: https://github.com/rust-lang/rust/pull/37108
2485 [37111]: https://github.com/rust-lang/rust/pull/37111
2486 [37161]: https://github.com/rust-lang/rust/pull/37161
2487 [37162]: https://github.com/rust-lang/rust/pull/37162
2488 [37167]: https://github.com/rust-lang/rust/pull/37167
2489 [37178]: https://github.com/rust-lang/rust/pull/37178
2490 [37200]: https://github.com/rust-lang/rust/pull/37200
2491 [37213]: https://github.com/rust-lang/rust/pull/37213
2492 [37221]: https://github.com/rust-lang/rust/pull/37221
2493 [37224]: https://github.com/rust-lang/rust/pull/37224
2494 [37230]: https://github.com/rust-lang/rust/pull/37230
2495 [37231]: https://github.com/rust-lang/rust/pull/37231
2496 [37247]: https://github.com/rust-lang/rust/pull/37247
2497 [37267]: https://github.com/rust-lang/rust/pull/37267
2498 [37270]: https://github.com/rust-lang/rust/pull/37270
2499 [37273]: https://github.com/rust-lang/rust/pull/37273
2500 [37280]: https://github.com/rust-lang/rust/pull/37280
2501 [37298]: https://github.com/rust-lang/rust/pull/37298
2502 [37306]: https://github.com/rust-lang/rust/pull/37306
2503 [37310]: https://github.com/rust-lang/rust/pull/37310
2504 [37312]: https://github.com/rust-lang/rust/pull/37312
2505 [37313]: https://github.com/rust-lang/rust/pull/37313
2506 [37315]: https://github.com/rust-lang/rust/pull/37315
2507 [37318]: https://github.com/rust-lang/rust/pull/37318
2508 [37322]: https://github.com/rust-lang/rust/pull/37322
2509 [37326]: https://github.com/rust-lang/rust/pull/37326
2510 [37351]: https://github.com/rust-lang/rust/pull/37351
2511 [37356]: https://github.com/rust-lang/rust/pull/37356
2512 [37367]: https://github.com/rust-lang/rust/pull/37367
2513 [37373]: https://github.com/rust-lang/rust/pull/37373
2514 [37378]: https://github.com/rust-lang/rust/pull/37378
2515 [37389]: https://github.com/rust-lang/rust/pull/37389
2516 [37392]: https://github.com/rust-lang/rust/pull/37392
2517 [37427]: https://github.com/rust-lang/rust/pull/37427
2518 [37439]: https://github.com/rust-lang/rust/pull/37439
2519 [37445]: https://github.com/rust-lang/rust/pull/37445
2520 [37470]: https://github.com/rust-lang/rust/pull/37470
2521 [37569]: https://github.com/rust-lang/rust/pull/37569
2522 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2523 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
2524 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
2525 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
2526 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
2527 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
2528 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
2531 Version 1.13.0 (2016-11-10)
2532 ===========================
2537 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
2538 errors, like the `try!` macro, described in [RFC 0243].
2539 * [Stabilize macros in type position][36014]. Described in [RFC 873].
2540 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
2541 * [Fix `#[derive]` for empty tuple structs/variants][35728]
2542 * [Fix lifetime rules for 'if' conditions][36029]
2543 * [Avoid loading and parsing unconfigured non-inline modules][36482]
2548 * [Add the `-C link-arg` argument][36574]
2549 * [Remove the old AST-based backend from rustc_trans][35764]
2550 * [Don't enable NEON by default on armv7 Linux][35814]
2551 * [Fix debug line number info for macro expansions][35238]
2552 * [Do not emit "class method" debuginfo for types that are not
2553 DICompositeType][36008]
2554 * [Warn about multiple conflicting #[repr] hints][34623]
2555 * [When sizing DST, don't double-count nested struct prefixes][36351]
2556 * [Default RUST_MIN_STACK to 16MiB for now][36505]
2557 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
2558 * [Reject macros with empty repetitions to avoid infinite loop][36721]
2559 * [Expand macros without recursing to avoid stack overflows][36214]
2564 * [Replace macro backtraces with labeled local uses][35702]
2565 * [Improve error message for misplaced doc comments][33922]
2566 * [Buffer unix and lock windows to prevent message interleaving][35975]
2567 * [Update lifetime errors to specifically note temporaries][36171]
2568 * [Special case a few colors for Windows][36178]
2569 * [Suggest `use self` when such an import resolves][36289]
2570 * [Be more specific when type parameter shadows primitive type][36338]
2571 * Many minor improvements
2573 Compile-time Optimizations
2574 --------------------------
2576 * [Compute and cache HIR hashes at beginning][35854]
2577 * [Don't hash types in loan paths][36004]
2578 * [Cache projections in trans][35761]
2579 * [Optimize the parser's last token handling][36527]
2580 * [Only instantiate #[inline] functions in codegen units referencing
2581 them][36524]. This leads to big improvements in cases where crates export
2582 define many inline functions without using them directly.
2583 * [Lazily allocate TypedArena's first chunk][36592]
2584 * [Don't allocate during default HashSet creation][36734]
2591 * [`overflowing_abs`]
2592 * [`RefCell::try_borrow`]
2593 * [`RefCell::try_borrow_mut`]
2598 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
2599 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
2601 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
2602 * [Implement `Debug` for `std::vec::IntoIter`][35707]
2603 * [`CString`: avoid excessive growth just to 0-terminate][35871]
2604 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
2605 * [Use arc4rand on FreeBSD][35884]
2606 * [memrchr: Correct aligned offset computation][35969]
2607 * [Improve Demangling of Rust Symbols][36059]
2608 * [Use monotonic time in condition variables][35048]
2609 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
2610 * [Implement conversion traits for `char`][35755]
2611 * [Fix illegal instruction caused by overflow in channel cloning][36104]
2612 * [Zero first byte of CString on drop][36264]
2613 * [Inherit overflow checks for sum and product][36372]
2614 * [Add missing Eq implementations][36423]
2615 * [Implement `Debug` for `DirEntry`][36631]
2616 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
2618 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2619 * [Implement more traits for `std::io::ErrorKind`][35911]
2620 * [Optimize BinaryHeap bounds checking][36072]
2621 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
2622 `extend_with_element`][36355]
2623 * [Fix overflow checking in unsigned pow()][34942]
2628 * This release includes security fixes to both curl and OpenSSL.
2629 * [Fix transitive doctests when panic=abort][cargo/3021]
2630 * [Add --all-features flag to cargo][cargo/3038]
2631 * [Reject path-based dependencies in `cargo package`][cargo/3060]
2632 * [Don't parse the home directory more than once][cargo/3078]
2633 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
2634 * [Update OpenSSL to 1.0.2j][cargo/3121]
2635 * [Add license and license_file to cargo metadata output][cargo/3110]
2636 * [Make crates-io registry URL optional in config; ignore all changes to
2637 source.crates-io][cargo/3089]
2638 * [Don't download dependencies from other platforms][cargo/3123]
2639 * [Build transitive dev-dependencies when needed][cargo/3125]
2640 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
2641 * [Avoid updating registry when adding existing deps][cargo/3144]
2642 * [Warn about path overrides that won't work][cargo/3136]
2643 * [Use workspaces during `cargo install`][cargo/3146]
2644 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
2645 * [Add --message-format flag][cargo/3000]
2646 * [Pass target environment for rustdoc][cargo/3205]
2647 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
2648 * [Update curl and curl-sys][cargo/3241]
2649 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
2654 * [rustdoc: Add the `--sysroot` argument][36586]
2655 * [rustdoc: Fix a couple of issues with the search results][35655]
2656 * [rustdoc: remove the `!` from macro URLs and titles][35234]
2657 * [gdb: Fix pretty-printing special-cased Rust types][35585]
2658 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
2663 * [Remove unmaintained style guide][35124]
2664 * [Add s390x support][36369]
2665 * [Initial work at Haiku OS support][36727]
2666 * [Add mips-uclibc targets][35734]
2667 * [Crate-ify compiler-rt into compiler-builtins][35021]
2668 * [Add rustc version info (git hash + date) to dist tarball][36213]
2669 * Many documentation improvements
2674 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2675 * [Deny (by default) transmuting from fn item types to pointer-sized
2676 types][34923]. Continuing the long transition to zero-sized fn items,
2678 * [Fix `#[derive]` for empty tuple structs/variants][35728].
2680 * [Issue deprecation warnings for safe accesses to extern statics][36173]
2681 * [Fix lifetime rules for 'if' conditions][36029].
2682 * [Inherit overflow checks for sum and product][36372].
2683 * [Forbid user-defined macros named "macro_rules"][36730].
2685 [33922]: https://github.com/rust-lang/rust/pull/33922
2686 [34623]: https://github.com/rust-lang/rust/pull/34623
2687 [34923]: https://github.com/rust-lang/rust/pull/34923
2688 [34942]: https://github.com/rust-lang/rust/pull/34942
2689 [34982]: https://github.com/rust-lang/rust/pull/34982
2690 [35021]: https://github.com/rust-lang/rust/pull/35021
2691 [35048]: https://github.com/rust-lang/rust/pull/35048
2692 [35074]: https://github.com/rust-lang/rust/pull/35074
2693 [35124]: https://github.com/rust-lang/rust/pull/35124
2694 [35234]: https://github.com/rust-lang/rust/pull/35234
2695 [35238]: https://github.com/rust-lang/rust/pull/35238
2696 [35354]: https://github.com/rust-lang/rust/pull/35354
2697 [35559]: https://github.com/rust-lang/rust/pull/35559
2698 [35585]: https://github.com/rust-lang/rust/pull/35585
2699 [35627]: https://github.com/rust-lang/rust/pull/35627
2700 [35655]: https://github.com/rust-lang/rust/pull/35655
2701 [35702]: https://github.com/rust-lang/rust/pull/35702
2702 [35707]: https://github.com/rust-lang/rust/pull/35707
2703 [35728]: https://github.com/rust-lang/rust/pull/35728
2704 [35734]: https://github.com/rust-lang/rust/pull/35734
2705 [35755]: https://github.com/rust-lang/rust/pull/35755
2706 [35761]: https://github.com/rust-lang/rust/pull/35761
2707 [35764]: https://github.com/rust-lang/rust/pull/35764
2708 [35814]: https://github.com/rust-lang/rust/pull/35814
2709 [35854]: https://github.com/rust-lang/rust/pull/35854
2710 [35871]: https://github.com/rust-lang/rust/pull/35871
2711 [35884]: https://github.com/rust-lang/rust/pull/35884
2712 [35911]: https://github.com/rust-lang/rust/pull/35911
2713 [35969]: https://github.com/rust-lang/rust/pull/35969
2714 [35975]: https://github.com/rust-lang/rust/pull/35975
2715 [36004]: https://github.com/rust-lang/rust/pull/36004
2716 [36008]: https://github.com/rust-lang/rust/pull/36008
2717 [36014]: https://github.com/rust-lang/rust/pull/36014
2718 [36029]: https://github.com/rust-lang/rust/pull/36029
2719 [36059]: https://github.com/rust-lang/rust/pull/36059
2720 [36072]: https://github.com/rust-lang/rust/pull/36072
2721 [36101]: https://github.com/rust-lang/rust/pull/36101
2722 [36104]: https://github.com/rust-lang/rust/pull/36104
2723 [36171]: https://github.com/rust-lang/rust/pull/36171
2724 [36173]: https://github.com/rust-lang/rust/pull/36173
2725 [36178]: https://github.com/rust-lang/rust/pull/36178
2726 [36213]: https://github.com/rust-lang/rust/pull/36213
2727 [36214]: https://github.com/rust-lang/rust/pull/36214
2728 [36264]: https://github.com/rust-lang/rust/pull/36264
2729 [36266]: https://github.com/rust-lang/rust/pull/36266
2730 [36289]: https://github.com/rust-lang/rust/pull/36289
2731 [36338]: https://github.com/rust-lang/rust/pull/36338
2732 [36351]: https://github.com/rust-lang/rust/pull/36351
2733 [36355]: https://github.com/rust-lang/rust/pull/36355
2734 [36369]: https://github.com/rust-lang/rust/pull/36369
2735 [36372]: https://github.com/rust-lang/rust/pull/36372
2736 [36423]: https://github.com/rust-lang/rust/pull/36423
2737 [36482]: https://github.com/rust-lang/rust/pull/36482
2738 [36505]: https://github.com/rust-lang/rust/pull/36505
2739 [36524]: https://github.com/rust-lang/rust/pull/36524
2740 [36527]: https://github.com/rust-lang/rust/pull/36527
2741 [36551]: https://github.com/rust-lang/rust/pull/36551
2742 [36574]: https://github.com/rust-lang/rust/pull/36574
2743 [36586]: https://github.com/rust-lang/rust/pull/36586
2744 [36592]: https://github.com/rust-lang/rust/pull/36592
2745 [36631]: https://github.com/rust-lang/rust/pull/36631
2746 [36639]: https://github.com/rust-lang/rust/pull/36639
2747 [36721]: https://github.com/rust-lang/rust/pull/36721
2748 [36727]: https://github.com/rust-lang/rust/pull/36727
2749 [36730]: https://github.com/rust-lang/rust/pull/36730
2750 [36734]: https://github.com/rust-lang/rust/pull/36734
2751 [36754]: https://github.com/rust-lang/rust/pull/36754
2752 [36995]: https://github.com/rust-lang/rust/pull/36995
2753 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
2754 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
2755 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2756 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
2757 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
2758 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
2759 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
2760 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
2761 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
2762 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
2763 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
2764 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
2765 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
2766 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
2767 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
2768 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
2769 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
2770 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
2771 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
2772 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
2773 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
2774 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
2775 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
2776 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
2777 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
2778 [rustup]: https://www.rustup.rs
2779 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
2780 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
2781 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
2782 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
2783 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
2784 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
2785 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
2788 Version 1.12.1 (2016-10-20)
2789 ===========================
2794 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
2795 * [Confusion with double negation and booleans][36856]
2796 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
2797 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
2798 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
2799 * [Corrupted memory after updated to 1.12][36936]
2800 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
2801 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
2802 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
2804 [36381]: https://github.com/rust-lang/rust/issues/36381
2805 [36856]: https://github.com/rust-lang/rust/issues/36856
2806 [36875]: https://github.com/rust-lang/rust/issues/36875
2807 [36924]: https://github.com/rust-lang/rust/issues/36924
2808 [36926]: https://github.com/rust-lang/rust/issues/36926
2809 [36936]: https://github.com/rust-lang/rust/issues/36936
2810 [37026]: https://github.com/rust-lang/rust/issues/37026
2811 [37112]: https://github.com/rust-lang/rust/issues/37112
2812 [37153]: https://github.com/rust-lang/rust/issues/37153
2815 Version 1.12.0 (2016-09-29)
2816 ===========================
2821 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2822 This translation pass is far simpler than the previous AST->LLVM pass, and
2823 creates opportunities to perform new optimizations directly on the MIR. It
2824 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2825 * [`rustc` presents a new, more readable error format, along with
2826 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2827 Most common editors supporting Rust have been updated to work with it. It was
2828 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2833 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2834 This translation pass is far simpler than the previous AST->LLVM pass, and
2835 creates opportunities to perform new optimizations directly on the MIR. It
2836 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2837 * [Print the Rust target name, not the LLVM target name, with
2838 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
2839 * [The computation of `TypeId` is correct in some cases where it was previously
2840 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
2841 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
2842 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
2843 `--print relocation-models`, and `--print code-models` print the available
2844 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
2845 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
2846 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
2847 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
2848 These targets produce statically-linked binaries. There are no binary release
2854 * [`rustc` presents a new, more readable error format, along with
2855 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2856 Most common editors supporting Rust have been updated to work with it. It was
2857 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2858 * [In error descriptions, references are now described in plain English,
2859 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
2860 * [In error type descriptions, unknown numeric types are named `{integer}` or
2861 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
2862 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
2867 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
2868 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
2869 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
2870 useful](https://github.com/rust-lang/rust/pull/34908)
2871 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
2872 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
2873 * [Semicolons are properly required as statement delimiters inside
2874 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
2875 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2880 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
2881 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
2882 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
2883 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
2884 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
2885 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
2886 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
2887 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
2888 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
2889 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
2890 Both on Unix and Windows.
2891 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
2892 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
2893 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
2894 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
2895 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
2896 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
2897 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
2898 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
2903 * [The `format!` macro and friends now allow a single argument to be formatted
2904 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
2905 * [The lifetime bounds on `[T]::binary_search_by` and
2906 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
2907 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
2908 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
2909 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
2910 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
2911 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
2912 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
2913 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
2914 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
2915 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
2916 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
2917 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
2918 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
2919 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
2920 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
2921 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
2922 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
2923 * [`mpsc::sync_channel` `Receiver`s return any available message before
2924 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
2925 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
2926 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
2931 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
2932 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
2933 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
2934 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
2935 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
2936 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
2937 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
2938 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
2939 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
2940 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
2941 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
2942 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
2943 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
2944 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
2945 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
2946 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
2951 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
2952 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
2957 * [Test binaries now support a `--test-threads` argument to specify the number
2958 of threads used to run tests, and which acts the same as the
2959 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
2960 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
2961 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
2962 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2963 * [Rust releases now come with source packages that can be installed by rustup
2964 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
2965 The resulting source code can be used by tools and IDES, located in the
2966 sysroot under `lib/rustlib/src`.
2971 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
2972 * Many minor improvements to the documentation.
2973 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
2978 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
2979 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
2980 * [When formatting strings, if "precision" is specified, the "fill",
2981 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
2982 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
2985 Version 1.11.0 (2016-08-18)
2986 ===========================
2991 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2992 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
2993 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
2994 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
2995 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
3000 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
3001 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
3002 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
3003 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
3004 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
3005 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
3006 (in libcore - previously stabilized in libstd)
3007 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
3008 (in libcore - previously stabilized in libstd)
3009 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
3010 (in libcore - previously stabilized in libstd)
3011 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
3012 (in libcore - previously stabilized in libstd)
3013 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3014 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3015 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
3016 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
3021 * [The `thread_local!` macro supports multiple definitions in a single
3022 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
3023 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
3024 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
3025 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
3026 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
3027 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
3028 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
3029 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
3034 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
3035 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
3036 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
3037 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
3038 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
3039 and `-vv` prints warnings for all crates.
3040 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
3041 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
3042 This provides room for expansion by arbitrary tools.
3043 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
3044 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
3045 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
3046 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
3047 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
3048 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
3049 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
3054 * [Caching projections speeds up type check dramatically for some
3055 workloads](https://github.com/rust-lang/rust/pull/33816)
3056 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
3057 This hasher is faster, but is believed to provide sufficient
3058 protection from collision attacks.
3059 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
3064 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
3065 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
3066 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
3067 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
3068 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
3073 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
3074 * [When emitting debug info, rustc emits frame pointers for closures,
3075 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
3076 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
3077 * Many more errors have been given error codes and extended
3079 * API documentation continues to be improved, with many new examples
3084 * [rustc no longer hangs when dependencies recursively re-export
3085 submodules](https://github.com/rust-lang/rust/pull/34542)
3086 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
3087 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
3088 rewritten](https://github.com/rust-lang/rust/pull/33895)
3089 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
3090 No targets use this yet, but it works toward AVR support.
3095 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
3096 * [The new follow-set rules that place restrictions on `macro_rules!`
3097 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
3098 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
3099 and has been a warning since 1.10.
3100 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
3101 This causes breakage in some corner cases.
3104 Version 1.10.0 (2016-07-07)
3105 ===========================
3110 * [Allow `concat_idents!` in type positions as well as in expression
3111 positions](https://github.com/rust-lang/rust/pull/33735).
3112 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
3113 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
3114 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
3115 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
3116 * [`panic!` can be converted to a runtime abort with the
3117 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
3118 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3119 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
3120 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
3121 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-cdylib.md).
3122 Note that Cargo does not yet directly support cdylibs.
3127 * `os::windows::fs::OpenOptionsExt::access_mode`
3128 * `os::windows::fs::OpenOptionsExt::share_mode`
3129 * `os::windows::fs::OpenOptionsExt::custom_flags`
3130 * `os::windows::fs::OpenOptionsExt::attributes`
3131 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
3132 * `os::unix::fs::OpenOptionsExt::custom_flags`
3133 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
3134 * `Default for sync::Weak`
3135 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
3136 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
3137 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
3138 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
3139 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
3140 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
3141 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
3142 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
3143 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
3144 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
3145 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
3146 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
3147 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
3148 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
3149 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
3150 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
3151 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
3152 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
3153 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
3154 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
3155 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
3156 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
3157 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
3158 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
3159 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
3160 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
3161 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
3162 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
3163 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
3164 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
3165 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
3166 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
3167 * Read/Write/RawFd impls for `UnixStream`
3168 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
3169 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
3170 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
3171 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
3172 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
3173 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
3174 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
3175 * RawFd impls for `UnixListener`
3176 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
3177 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
3178 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
3179 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
3180 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
3181 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
3182 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
3183 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
3184 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
3185 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
3186 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
3187 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
3188 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
3189 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
3190 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
3191 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
3192 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
3193 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
3194 * RawFd impls for `UnixDatagram`
3195 * `{BTree,Hash}Map::values_mut`
3196 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/std/primitive.slice.html#method.binary_search_by_key)
3201 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
3202 The semantics of this minor method are subtle and probably not what
3204 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
3205 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
3206 will fall back to `/dev/urandom` temporarily to avoid blocking
3207 during early boot](https://github.com/rust-lang/rust/pull/33086).
3208 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
3209 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
3210 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
3211 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
3212 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
3213 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
3214 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
3218 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
3219 This controls the runtime behavior of the `panic!` macro
3220 and can be either "unwind" (the default), or "abort".
3221 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3222 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
3223 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
3224 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
3225 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
3226 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
3227 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
3228 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
3229 By default they are retried twice, which can be customized with the
3230 `net.retry` value in `.cargo/config`.
3231 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
3232 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
3233 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
3234 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
3235 Makes it possible to install multiple crates in parallel.
3236 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
3237 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
3238 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
3239 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
3240 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
3241 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
3246 * [rustc memory usage was reduced by refactoring the context used for
3247 type checking](https://github.com/rust-lang/rust/pull/33425).
3248 * [Speed up creation of `HashMap`s by caching the random keys used
3249 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
3250 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
3251 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
3252 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
3253 10x faster than the previous lookup tables.
3254 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
3259 * Many incremental improvements to documentation and rustdoc.
3260 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
3261 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
3262 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
3263 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
3264 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
3265 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
3266 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
3271 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
3272 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
3273 * [`std` no longer prints backtraces on platforms where the running
3274 module must be loaded with `env::current_exe`, which can't be relied
3275 on](https://github.com/rust-lang/rust/pull/33554).
3276 * This release includes std binaries for the i586-unknown-linux-gnu,
3277 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
3278 i586 target is for old x86 hardware without SSE2, and the armv7
3279 target is for Android running on modern ARM architectures.
3280 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
3281 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
3282 * [On Unix the runtime aborts by calling `libc::abort` instead of
3283 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
3284 * [Rust is now bootstrapped from the previous release of Rust,
3285 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
3290 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
3291 * [`target_env` for Linux ARM targets is just `gnu`, not
3292 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
3293 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
3294 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
3295 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
3296 Affects how macros are parsed.
3297 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
3298 * [Feature-gated attributes on macro-generated macro invocations are
3299 now rejected](https://github.com/rust-lang/rust/pull/32791).
3300 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
3301 This caused some minor changes to type inference.
3304 Version 1.9.0 (2016-05-26)
3305 ==========================
3310 * The `#[deprecated]` attribute when applied to an API will generate
3311 warnings when used. The warnings may be suppressed with
3312 `#[allow(deprecated)]`. [RFC 1270].
3313 * [`fn` item types are zero sized, and each `fn` names a unique
3314 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3315 `transmute` on a `fn` type will generate a warning for a few cycles,
3316 then will be converted to an error.
3317 * [Field and method resolution understand visibility, so private
3318 fields and methods cannot prevent the proper use of public fields
3319 and methods][1.9fv].
3320 * [The parser considers unicode codepoints in the
3321 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
3327 * [`std::panic::catch_unwind`][] (renamed from `recover`)
3328 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
3329 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
3330 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
3331 * [`str::is_char_boundary`]
3332 * [`<*const T>::as_ref`]
3333 * [`<*mut T>::as_ref`]
3334 * [`<*mut T>::as_mut`]
3335 * [`AsciiExt::make_ascii_uppercase`]
3336 * [`AsciiExt::make_ascii_lowercase`]
3337 * [`char::decode_utf16`]
3338 * [`char::DecodeUtf16`]
3339 * [`char::DecodeUtf16Error`]
3340 * [`char::DecodeUtf16Error::unpaired_surrogate`]
3341 * [`BTreeSet::take`]
3342 * [`BTreeSet::replace`]
3345 * [`HashSet::replace`]
3347 * [`OsString::with_capacity`]
3348 * [`OsString::clear`]
3349 * [`OsString::capacity`]
3350 * [`OsString::reserve`]
3351 * [`OsString::reserve_exact`]
3352 * [`OsStr::is_empty`]
3354 * [`std::os::unix::thread`]
3357 * [`JoinHandleExt::as_pthread_t`]
3358 * [`JoinHandleExt::into_pthread_t`]
3359 * [`HashSet::hasher`]
3360 * [`HashMap::hasher`]
3361 * [`CommandExt::exec`]
3362 * [`File::try_clone`]
3363 * [`SocketAddr::set_ip`]
3364 * [`SocketAddr::set_port`]
3365 * [`SocketAddrV4::set_ip`]
3366 * [`SocketAddrV4::set_port`]
3367 * [`SocketAddrV6::set_ip`]
3368 * [`SocketAddrV6::set_port`]
3369 * [`SocketAddrV6::set_flowinfo`]
3370 * [`SocketAddrV6::set_scope_id`]
3371 * [`slice::copy_from_slice`]
3372 * [`ptr::read_volatile`]
3373 * [`ptr::write_volatile`]
3374 * [`OpenOptions::create_new`]
3375 * [`TcpStream::set_nodelay`]
3376 * [`TcpStream::nodelay`]
3377 * [`TcpStream::set_ttl`]
3378 * [`TcpStream::ttl`]
3379 * [`TcpStream::set_only_v6`]
3380 * [`TcpStream::only_v6`]
3381 * [`TcpStream::take_error`]
3382 * [`TcpStream::set_nonblocking`]
3383 * [`TcpListener::set_ttl`]
3384 * [`TcpListener::ttl`]
3385 * [`TcpListener::set_only_v6`]
3386 * [`TcpListener::only_v6`]
3387 * [`TcpListener::take_error`]
3388 * [`TcpListener::set_nonblocking`]
3389 * [`UdpSocket::set_broadcast`]
3390 * [`UdpSocket::broadcast`]
3391 * [`UdpSocket::set_multicast_loop_v4`]
3392 * [`UdpSocket::multicast_loop_v4`]
3393 * [`UdpSocket::set_multicast_ttl_v4`]
3394 * [`UdpSocket::multicast_ttl_v4`]
3395 * [`UdpSocket::set_multicast_loop_v6`]
3396 * [`UdpSocket::multicast_loop_v6`]
3397 * [`UdpSocket::set_multicast_ttl_v6`]
3398 * [`UdpSocket::multicast_ttl_v6`]
3399 * [`UdpSocket::set_ttl`]
3400 * [`UdpSocket::ttl`]
3401 * [`UdpSocket::set_only_v6`]
3402 * [`UdpSocket::only_v6`]
3403 * [`UdpSocket::join_multicast_v4`]
3404 * [`UdpSocket::join_multicast_v6`]
3405 * [`UdpSocket::leave_multicast_v4`]
3406 * [`UdpSocket::leave_multicast_v6`]
3407 * [`UdpSocket::take_error`]
3408 * [`UdpSocket::connect`]
3409 * [`UdpSocket::send`]
3410 * [`UdpSocket::recv`]
3411 * [`UdpSocket::set_nonblocking`]
3416 * [`std::sync::Once` is poisoned if its initialization function
3418 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
3419 * [Most types implement `fmt::Debug`][1.9db].
3420 * [The default buffer size used by `BufReader` and `BufWriter` was
3421 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
3422 used by other languages.
3423 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
3424 `Duration` additionally implements `*=` and `/=`][1.9ta].
3425 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
3426 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
3427 * [`Chain` implements `BufRead`][1.9ch].
3428 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
3433 * [Cargo can now run concurrently][1.9cc].
3434 * [Top-level overrides allow specific revisions of crates to be
3435 overridden through the entire crate graph][1.9ct]. This is intended
3436 to make upgrades easier for large projects, by allowing crates to be
3437 forked temporarily until they've been upgraded and republished.
3438 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
3439 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
3440 on the commandline][1.9cf]. `rustc` arguments can also be specified
3441 in the `build.rustflags` configuration key.
3446 * [The time complexity of comparing variables for equivalence during type
3447 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
3448 to major compilation time improvement in some scenarios.
3449 * [`ToString` is specialized for `str`, giving it the same performance
3450 as `to_owned`][1.9ts].
3451 * [Spawning processes with `Command::output` no longer creates extra
3453 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
3454 for C-like enums][1.9cl].
3459 * [Passing the `--quiet` flag to a test runner will produce
3460 much-abbreviated output][1.9q].
3461 * The Rust Project now publishes std binaries for the
3462 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
3463 `i586-pc-windows-msvc` targets.
3468 * [`std::sync::Once` is poisoned if its initialization function
3470 * [It is illegal to define methods with the same name in overlapping
3471 inherent `impl` blocks][1.9sn].
3472 * [`fn` item types are zero sized, and each `fn` names a unique
3473 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3474 `transmute` on a `fn` type will generate a warning for a few cycles,
3475 then will be converted to an error.
3476 * [Improvements to const evaluation may trigger new errors when integer
3477 literals are out of range][1.9ce].
3480 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
3481 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
3482 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
3483 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
3484 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
3485 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
3486 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
3487 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
3488 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
3489 [1.9db]: https://github.com/rust-lang/rust/pull/32054
3490 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
3491 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
3492 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
3493 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
3494 [1.9o]: https://github.com/rust-lang/rust/pull/32325
3495 [1.9q]: https://github.com/rust-lang/rust/pull/31887
3496 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
3497 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
3498 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
3499 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
3500 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
3501 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
3502 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
3503 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
3504 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3505 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
3506 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3507 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
3508 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
3509 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
3510 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
3511 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
3512 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
3513 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
3514 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
3515 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
3516 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
3517 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
3518 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
3519 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
3520 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
3521 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
3522 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
3523 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
3524 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
3525 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
3526 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
3527 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
3528 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
3529 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
3530 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
3531 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
3532 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
3533 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
3534 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
3535 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
3536 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
3537 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
3538 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
3539 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
3540 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3541 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3542 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3543 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3544 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3545 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3546 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
3547 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3548 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
3549 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3550 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3551 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3552 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3553 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3554 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
3555 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
3556 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
3557 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
3558 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
3559 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
3560 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
3561 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
3562 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
3563 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
3564 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
3565 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
3566 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
3567 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
3568 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
3569 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
3570 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
3571 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
3572 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
3573 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
3574 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
3575 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
3576 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
3577 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
3578 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
3579 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
3580 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
3581 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
3582 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
3583 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
3584 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
3585 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
3586 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
3587 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
3588 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
3589 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
3592 Version 1.8.0 (2016-04-14)
3593 ==========================
3598 * Rust supports overloading of compound assignment statements like
3599 `+=` by implementing the [`AddAssign`], [`SubAssign`],
3600 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
3601 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
3603 * Empty structs can be defined with braces, as in `struct Foo { }`, in
3604 addition to the non-braced form, `struct Foo;`. [RFC 218].
3610 * [`str::encode_utf16`][] (renamed from `utf16_units`)
3611 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
3614 * [`ptr::drop_in_place`]
3616 * [`time::SystemTime`]
3618 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
3619 * [`Instant::elapsed`]
3620 * [`SystemTime::now`]
3621 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
3622 * [`SystemTime::elapsed`]
3623 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
3624 * [`SystemTimeError`]
3625 * [`SystemTimeError::duration`]
3626 * Various impls for `SystemTimeError`
3628 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
3629 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
3630 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
3631 * [The `write!` and `writeln!` macros correctly emit errors if any of
3632 their arguments can't be formatted][1.8w].
3633 * [Various I/O functions support large files on 32-bit Linux][1.8l].
3634 * [The Unix-specific `raw` modules, which contain a number of
3635 redefined C types are deprecated][1.8r], including `os::raw::unix`,
3636 `os::raw::macos`, and `os::raw::linux`. These modules defined types
3637 such as `ino_t` and `dev_t`. The inconsistency of these definitions
3638 across platforms was making it difficult to implement `std`
3639 correctly. Those that need these definitions should use the `libc`
3641 * The Unix-specific `MetadataExt` traits, including
3642 `os::unix::fs::MetadataExt`, which expose values such as inode
3643 numbers [no longer return platform-specific types][1.8r], but
3644 instead return widened integers. [RFC 1415].
3645 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
3646 * [Atomic loads and stores are not volatile][1.8a].
3647 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
3652 * [Inlining hash functions lead to a 3% compile-time improvement in
3653 some workloads][1.8h].
3654 * When using jemalloc, its symbols are [unprefixed so that it
3655 overrides the libc malloc implementation][1.8h]. This means that for
3656 rustc, LLVM is now using jemalloc, which results in a 6%
3657 compile-time improvement on a specific workload.
3658 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
3663 * [32-bit MSVC builds finally implement unwinding][1.8ms].
3664 i686-pc-windows-msvc is now considered a tier-1 platform.
3665 * [The `--print targets` flag prints a list of supported targets][1.8t].
3666 * [The `--print cfg` flag prints the `cfg`s defined for the current
3668 * [`rustc` can be built with an new Cargo-based build system, written
3669 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
3670 build system. To enable it configure with `configure --rustbuild`.
3671 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
3672 variants while also indicating the total number of missing variants
3673 if more than 3][1.8m].
3674 * [Executable stacks are disabled on Linux and BSD][1.8nx].
3675 * The Rust Project now publishes binary releases of the standard
3676 library for a number of tier-2 targets:
3677 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
3678 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
3679 `x86_64-rumprun-netbsd`. These can be installed with
3680 tools such as [multirust][1.8mr].
3685 * [`cargo init` creates a new Cargo project in the current
3686 directory][1.8ci]. It is otherwise like `cargo new`.
3687 * [Cargo has configuration keys for `-v` and
3688 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
3689 `[term]` section of `.cargo/config`.
3690 * [Configuration keys that evaluate to strings or integers can be set
3691 via environment variables][1.8ce]. For example the `build.jobs` key
3692 can be set via `CARGO_BUILD_JOBS`. Environment variables take
3693 precedence over config files.
3694 * [Target-specific dependencies support Rust `cfg` syntax for
3695 describing targets][1.8cfg] so that dependencies for multiple
3696 targets can be specified together. [RFC 1361].
3697 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
3698 `RUSTDOC` take precedence over the `build.target-dir`,
3699 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
3700 * [The child process tree is killed on Windows when Cargo is
3702 * [The `build.target` configuration value sets the target platform,
3703 like `--target`][1.8ct].
3708 * [Unstable compiler flags have been further restricted][1.8u]. Since
3709 1.0 `-Z` flags have been considered unstable, and other flags that
3710 were considered unstable additionally required passing `-Z
3711 unstable-options` to access. Unlike unstable language and library
3712 features though, these options have been accessible on the stable
3713 release channel. Going forward, *new unstable flags will not be
3714 available on the stable release channel*, and old unstable flags
3715 will warn about their usage. In the future, all unstable flags will
3716 be unavailable on the stable release channel.
3717 * [It is no longer possible to `match` on empty enum variants using
3718 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
3719 * The Unix-specific `MetadataExt` traits, including
3720 `os::unix::fs::MetadataExt`, which expose values such as inode
3721 numbers [no longer return platform-specific types][1.8r], but
3722 instead return widened integers. [RFC 1415].
3723 * [Modules sourced from the filesystem cannot appear within arbitrary
3724 blocks, but only within other modules][1.8mf].
3725 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
3726 * On Unix, [stack overflow triggers a runtime abort instead of a
3728 * [`Command::spawn` and its equivalents return an error if any of
3729 its command-line arguments contain interior `NUL`s][1.8n].
3730 * [Tuple and unit enum variants from other crates are in the type
3732 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
3733 type instead of `.a` files][1.8st]. Additionally, for the MSVC
3734 toolchain, `rustc` emits import libraries named `foo.dll.lib`
3735 instead of `foo.lib`.
3738 [1.8a]: https://github.com/rust-lang/rust/pull/30962
3739 [1.8b]: https://github.com/rust-lang/rust/pull/31123
3740 [1.8c]: https://github.com/rust-lang/rust/pull/31530
3741 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
3742 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
3743 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
3744 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
3745 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
3746 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
3747 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
3748 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
3749 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
3750 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
3751 [1.8h]: https://github.com/rust-lang/rust/pull/31460
3752 [1.8l]: https://github.com/rust-lang/rust/pull/31668
3753 [1.8m]: https://github.com/rust-lang/rust/pull/31020
3754 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
3755 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
3756 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
3757 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
3758 [1.8n]: https://github.com/rust-lang/rust/pull/31056
3759 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
3760 [1.8r]: https://github.com/rust-lang/rust/pull/31551
3761 [1.8so]: https://github.com/rust-lang/rust/pull/31333
3762 [1.8st]: https://github.com/rust-lang/rust/pull/29520
3763 [1.8t]: https://github.com/rust-lang/rust/pull/31358
3764 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
3765 [1.8u]: https://github.com/rust-lang/rust/pull/31793
3766 [1.8v]: https://github.com/rust-lang/rust/pull/31757
3767 [1.8w]: https://github.com/rust-lang/rust/pull/31904
3768 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
3769 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
3770 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
3771 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
3772 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
3773 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
3774 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
3775 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
3776 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
3777 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
3778 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
3779 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
3780 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
3781 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
3782 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
3783 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
3784 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
3785 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
3786 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
3787 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
3788 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
3789 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
3790 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
3791 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
3792 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
3793 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
3794 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
3795 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
3796 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
3797 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
3800 Version 1.7.0 (2016-03-03)
3801 ==========================
3808 * [`Path::strip_prefix`][] (renamed from relative_from)
3809 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
3811 * [`Ipv4Addr::is_loopback`]
3812 * [`Ipv4Addr::is_private`]
3813 * [`Ipv4Addr::is_link_local`]
3814 * [`Ipv4Addr::is_multicast`]
3815 * [`Ipv4Addr::is_broadcast`]
3816 * [`Ipv4Addr::is_documentation`]
3818 * [`Ipv6Addr::is_unspecified`]
3819 * [`Ipv6Addr::is_loopback`]
3820 * [`Ipv6Addr::is_multicast`]
3823 * [`Vec::as_mut_slice`]
3825 * [`String::as_str`]
3826 * [`String::as_mut_str`]
3828 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
3830 * `<[T]>::`[`sort_by_key`]
3831 * checked, saturated, and overflowing operations
3832 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
3833 * [`i32::saturating_mul`]
3834 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
3835 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
3836 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
3837 * [`u32::saturating_mul`]
3838 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
3839 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
3840 * and checked, saturated, and overflowing operations for other primitive types
3842 * [`ffi::IntoStringError`]
3843 * [`CString::into_string`]
3844 * [`CString::into_bytes`]
3845 * [`CString::into_bytes_with_nul`]
3846 * `From<CString> for Vec<u8>`
3848 * [`IntoStringError::into_cstring`]
3849 * [`IntoStringError::utf8_error`]
3850 * `Error for IntoStringError`
3852 * [`std::hash::BuildHasher`]
3853 * [`BuildHasher::Hasher`]
3854 * [`BuildHasher::build_hasher`]
3855 * [`std::hash::BuildHasherDefault`]
3856 * [`HashMap::with_hasher`]
3857 * [`HashMap::with_capacity_and_hasher`]
3858 * [`HashSet::with_hasher`]
3859 * [`HashSet::with_capacity_and_hasher`]
3860 * [`std::collections::hash_map::RandomState`]
3861 * [`RandomState::new`]
3862 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
3863 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
3864 from bytes is faster.
3865 * [The performance of `LineWriter` (and thus `io::stdout`) was
3866 improved by using `memchr` to search for newlines][1.7m].
3867 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
3868 `f64` variants were stabilized previously.
3869 * [`BTreeMap` was rewritten to use less memory and improve the performance
3870 of insertion and iteration, the latter by as much as 5x][1.7bm].
3871 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
3872 covariant over their contained type][1.7bt].
3873 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
3874 over their contained type][1.7ll].
3875 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
3877 * [`Any` is implemented for unsized types][1.7a].
3878 * [`Hash` is implemented for `Duration`][1.7h].
3883 * [When running tests with `--test`, rustdoc will pass `--cfg`
3884 arguments to the compiler][1.7dt].
3885 * [The compiler is built with RPATH information by default][1.7rpa].
3886 This means that it will be possible to run `rustc` when installed in
3887 unusual configurations without configuring the dynamic linker search
3889 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
3890 any RPATH entries (emitted with `-C rpath`) *not* take precedence
3891 over `LD_LIBRARY_PATH`.
3896 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
3897 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
3898 * [The `rerun-if-changed` build script directive no longer causes the
3899 build script to incorrectly run twice in certain scenarios][1.7rr].
3904 * Soundness fixes to the interactions between associated types and
3905 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
3906 code that violates the new rules. This is a significant change that
3907 is known to break existing code, so it has emitted warnings for the
3908 new error cases since 1.4 to give crate authors time to adapt. The
3909 details of what is changing are subtle; read the RFC for more.
3910 * [Several bugs in the compiler's visibility calculations were
3911 fixed][1.7v]. Since this was found to break significant amounts of
3912 code, the new errors will be emitted as warnings for several release
3913 cycles, under the `private_in_public` lint.
3914 * Defaulted type parameters were accidentally accepted in positions
3915 that were not intended. In this release, [defaulted type parameters
3916 appearing outside of type definitions will generate a
3917 warning][1.7d], which will become an error in future releases.
3918 * [Parsing "." as a float results in an error instead of 0][1.7p].
3919 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
3920 * [Borrows of closure parameters may not outlive the closure][1.7bc].
3922 [1.7a]: https://github.com/rust-lang/rust/pull/30928
3923 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
3924 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
3925 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
3926 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
3927 [1.7d]: https://github.com/rust-lang/rust/pull/30724
3928 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
3929 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
3930 [1.7f]: https://github.com/rust-lang/rust/pull/30672
3931 [1.7h]: https://github.com/rust-lang/rust/pull/30818
3932 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
3933 [1.7m]: https://github.com/rust-lang/rust/pull/30381
3934 [1.7p]: https://github.com/rust-lang/rust/pull/30681
3935 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
3936 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
3937 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
3938 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
3939 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
3940 [1.7v]: https://github.com/rust-lang/rust/pull/29973
3941 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3942 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
3943 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
3944 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
3945 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
3946 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
3947 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
3948 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
3949 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
3950 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
3951 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
3952 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
3953 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
3954 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
3955 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
3956 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
3957 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
3958 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
3959 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
3960 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
3961 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
3962 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
3963 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
3964 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
3965 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
3966 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
3967 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
3968 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
3969 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
3970 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
3971 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
3972 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
3973 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
3974 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
3975 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
3976 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
3977 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
3978 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
3979 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
3980 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
3981 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
3982 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
3983 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
3984 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
3985 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
3986 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
3987 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
3988 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3989 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
3990 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3991 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
3992 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
3993 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
3994 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
3995 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
3996 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
3997 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
3998 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
3999 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
4000 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
4003 Version 1.6.0 (2016-01-21)
4004 ==========================
4009 * The `#![no_std]` attribute causes a crate to not be linked to the
4010 standard library, but only the [core library][1.6co], as described
4011 in [RFC 1184]. The core library defines common types and traits but
4012 has no platform dependencies whatsoever, and is the basis for Rust
4013 software in environments that cannot support a full port of the
4014 standard library, such as operating systems. Most of the core
4015 library is now stable.
4021 [`Read::read_exact`],
4022 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
4023 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
4024 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
4025 [`os::unix::fs::DirBuilderExt`],
4026 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
4027 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
4028 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
4029 [`collections::hash_map::Drain`],
4030 [`collections::hash_map::HashMap::drain`],
4031 [`collections::hash_set::Drain`],
4032 [`collections::hash_set::HashSet::drain`],
4033 [`collections::binary_heap::Drain`],
4034 [`collections::binary_heap::BinaryHeap::drain`],
4035 [`Vec::extend_from_slice`][] (renamed from `push_all`),
4036 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
4037 [`RwLock::into_inner`],
4038 [`Iterator::min_by_key`][] (renamed from `min_by`),
4039 [`Iterator::max_by_key`][] (renamed from `max_by`).
4040 * The [core library][1.6co] is stable, as are most of its APIs.
4041 * [The `assert_eq!` macro supports arguments that don't implement
4042 `Sized`][1.6ae], such as arrays. In this way it behaves more like
4044 * Several timer functions that take duration in milliseconds [are
4045 deprecated in favor of those that take `Duration`][1.6ms]. These
4046 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
4047 `thread::park_timeout_ms`.
4048 * The algorithm by which `Vec` reserves additional elements was
4049 [tweaked to not allocate excessive space][1.6a] while still growing
4051 * `From` conversions are [implemented from integers to floats][1.6f]
4052 in cases where the conversion is lossless. Thus they are not
4053 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
4054 or `f64`. They are also not implemented for `isize` and `usize`
4055 because the implementations would be platform-specific. `From` is
4056 also implemented from `f32` to `f64`.
4057 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
4058 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
4059 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
4060 * [`BinaryHeap` was refactored][1.6bh] for modest performance
4062 * Sorting slices that are already sorted [is 50% faster in some
4068 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
4069 * Cargo build scripts can specify their dependencies by emitting the
4070 [`rerun-if-changed`][1.6rr] key.
4071 * crates.io will reject publication of crates with dependencies that
4072 have a wildcard version constraint. Crates with wildcard
4073 dependencies were seen to cause a variety of problems, as described
4074 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
4076 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
4077 release folder. A variety of artifacts that Cargo failed to clean
4078 are now correctly deleted.
4083 * The `unreachable_code` lint [warns when a function call's argument
4085 * The parser indicates [failures that may be caused by
4086 confusingly-similar Unicode characters][1.6uc]
4087 * Certain macro errors [are reported at definition time][1.6m], not
4093 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
4094 environment variable when locating crates. This was a pre-cargo
4095 feature for integrating with the package manager that was
4096 accidentally never removed.
4097 * [A number of bugs were fixed in the privacy checker][1.6p] that
4098 could cause previously-accepted code to break.
4099 * [Modules and unit/tuple structs may not share the same name][1.6ts].
4100 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
4101 struct pattern syntax (`Foo(..)`) can no longer be used to match
4102 unit structs. This is a warning now, but will become an error in
4103 future releases. Patterns that share the same name as a const are
4105 * A bug was fixed that causes [rustc not to apply default type
4106 parameters][1.6xc] when resolving certain method implementations of
4107 traits defined in other crates.
4109 [1.6a]: https://github.com/rust-lang/rust/pull/29454
4110 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
4111 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
4112 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
4113 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
4114 [1.6co]: http://doc.rust-lang.org/core/index.html
4115 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
4116 [1.6f]: https://github.com/rust-lang/rust/pull/29129
4117 [1.6m]: https://github.com/rust-lang/rust/pull/29828
4118 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
4119 [1.6p]: https://github.com/rust-lang/rust/pull/29726
4120 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
4121 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
4122 [1.6s]: https://github.com/rust-lang/rust/pull/29675
4123 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
4124 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
4125 [1.6us]: https://github.com/rust-lang/rust/pull/29383
4126 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
4127 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
4128 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4129 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
4130 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
4131 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
4132 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
4133 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
4134 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
4135 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
4136 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
4137 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
4138 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
4139 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
4140 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
4141 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
4142 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
4143 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
4144 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
4145 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
4146 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
4147 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
4148 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
4149 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
4150 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
4151 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
4152 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
4153 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
4154 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
4155 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
4158 Version 1.5.0 (2015-12-10)
4159 ==========================
4161 * ~700 changes, numerous bugfixes
4167 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
4168 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
4169 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
4170 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
4171 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
4172 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
4173 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
4174 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
4175 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
4176 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
4177 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
4178 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
4179 [`Path::read_link`], [`Path::symlink_metadata`],
4180 [`Utf8Error::valid_up_to`], [`Vec::resize`],
4181 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
4182 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
4183 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
4184 [`slice::split_first_mut`], [`slice::split_first`],
4185 [`slice::split_last_mut`], [`slice::split_last`],
4186 [`char::from_u32_unchecked`], [`fs::canonicalize`],
4187 [`str::MatchIndices`], [`str::RMatchIndices`],
4188 [`str::match_indices`], [`str::rmatch_indices`],
4189 [`str::slice_mut_unchecked`], [`string::ParseError`].
4190 * Rust applications hosted on crates.io can be installed locally to
4191 `~/.cargo/bin` with the [`cargo install`] command. Among other
4192 things this makes it easier to augment Cargo with new subcommands:
4193 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
4194 invoked as `cargo foo`.
4195 * Crates with wildcard (`*`) dependencies will [emit warnings when
4196 published][1.5w]. In 1.6 it will no longer be possible to publish
4197 crates with wildcard dependencies.
4202 * The rules determining when a particular lifetime must outlive
4203 a particular value (known as '[dropck]') have been [modified
4204 to not rely on parametricity][1.5p].
4205 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
4206 and `Arc`][1.5a]. Because these smart pointer types implement
4207 `Deref`, this causes breakage in cases where the interior type
4208 contains methods of the same name.
4209 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
4210 that they could drop their content. Soundness fix.
4211 * All method invocations are [properly checked][1.5wf1] for
4212 [well-formedness][1.5wf2]. Soundness fix.
4213 * Traits whose supertraits contain `Self` are [not object
4214 safe][1.5o]. Soundness fix.
4215 * Target specifications support a [`no_default_libraries`][1.5nd]
4216 setting that controls whether `-nodefaultlibs` is passed to the
4217 linker, and in turn the `is_like_windows` setting no longer affects
4218 the `-nodefaultlibs` flag.
4219 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
4220 * The `#[inline]` and `#[repr]` attributes [can only appear
4221 in valid locations][1.5at].
4222 * Native libraries linked from the local crate are [passed to
4223 the linker before native libraries from upstream crates][1.5nl].
4224 * Two rarely-used attributes, `#[no_debug]` and
4225 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
4226 * Negation of unsigned integers, which has been a warning for
4227 several releases, [is now behind a feature gate and will
4228 generate errors][1.5nu].
4229 * The parser accidentally accepted visibility modifiers on
4230 enum variants, a bug [which has been fixed][1.5ev].
4231 * [A bug was fixed that allowed `use` statements to import unstable
4237 * When evaluating expressions at compile-time that are not
4238 compile-time constants (const-evaluating expressions in non-const
4239 contexts), incorrect code such as overlong bitshifts and arithmetic
4240 overflow will [generate a warning instead of an error][1.5ce],
4241 delaying the error until runtime. This will allow the
4242 const-evaluator to be expanded in the future backwards-compatibly.
4243 * The `improper_ctypes` lint [no longer warns about using `isize` and
4244 `usize` in FFI][1.5ict].
4249 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
4251 * `Default` is [implemented for mutable slices][1.5d].
4252 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
4253 * There are now `From` conversions [between floating point
4254 types][1.5f] where the conversions are lossless.
4255 * There are now `From` conversions [between integer types][1.5i] where
4256 the conversions are lossless.
4257 * [`fs::Metadata` implements `Clone`][1.5fs].
4258 * The `parse` method [accepts a leading "+" when parsing
4260 * [`AsMut` is implemented for `Vec`][1.5am].
4261 * The `clone_from` implementations for `String` and `BinaryHeap` [have
4262 been optimized][1.5cf] and no longer rely on the default impl.
4263 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
4264 `unsafe extern "C"` function types now [implement `Clone`,
4265 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
4266 `fmt::Debug` for up to 12 arguments][1.5fp].
4267 * [Dropping `Vec`s is much faster in unoptimized builds when the
4268 element types don't implement `Drop`][1.5dv].
4269 * A bug that caused in incorrect behavior when [combining `VecDeque`
4270 with zero-sized types][1.5vdz] was resolved.
4271 * [`PartialOrd` for slices is faster][1.5po].
4276 * [Crate metadata size was reduced by 20%][1.5md].
4277 * [Improvements to code generation reduced the size of libcore by 3.3
4278 MB and rustc's memory usage by 18MB][1.5m].
4279 * [Improvements to deref translation increased performance in
4280 unoptimized builds][1.5dr].
4281 * Various errors in trait resolution [are deduplicated to only be
4282 reported once][1.5te].
4283 * Rust has preliminary [support for rumprun kernels][1.5rr].
4284 * Rust has preliminary [support for NetBSD on amd64][1.5na].
4286 [1.5use]: https://github.com/rust-lang/rust/pull/28364
4287 [1.5po]: https://github.com/rust-lang/rust/pull/28436
4288 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
4289 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
4290 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
4291 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
4292 [1.5md]: https://github.com/rust-lang/rust/pull/28521
4293 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
4294 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
4295 [1.5na]: https://github.com/rust-lang/rust/pull/28543
4296 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
4297 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
4298 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
4299 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
4300 [1.5te]: https://github.com/rust-lang/rust/pull/28645
4301 [1.5at]: https://github.com/rust-lang/rust/pull/28650
4302 [1.5am]: https://github.com/rust-lang/rust/pull/28663
4303 [1.5m]: https://github.com/rust-lang/rust/pull/28778
4304 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
4305 [1.5a]: https://github.com/rust-lang/rust/pull/28811
4306 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
4307 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
4308 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
4309 [1.5i]: https://github.com/rust-lang/rust/pull/28921
4310 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
4311 [1.5f]: https://github.com/rust-lang/rust/pull/29129
4312 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
4313 [1.5s]: https://github.com/rust-lang/rust/pull/29190
4314 [1.5d]: https://github.com/rust-lang/rust/pull/29245
4315 [1.5o]: https://github.com/rust-lang/rust/pull/29259
4316 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
4317 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4318 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
4319 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
4320 [1.5c]: https://github.com/rust-lang/rust/pull/29110
4321 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4322 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
4323 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
4324 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
4325 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
4326 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
4327 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
4328 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
4329 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
4330 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
4331 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
4332 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
4333 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
4334 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
4335 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
4336 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
4337 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
4338 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
4339 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
4340 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
4341 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
4342 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
4343 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
4344 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
4345 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
4346 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
4347 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
4348 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
4349 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
4350 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
4351 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
4352 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
4353 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
4354 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
4355 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
4356 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
4357 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
4358 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
4359 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
4360 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
4361 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
4362 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
4363 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
4364 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
4365 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
4366 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
4367 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
4368 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
4369 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
4370 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
4371 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
4372 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
4373 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
4374 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
4376 Version 1.4.0 (2015-10-29)
4377 ==========================
4379 * ~1200 changes, numerous bugfixes
4384 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
4385 GNU) are now supported and recommended for use.
4390 * [Several changes have been made to fix type soundness and improve
4391 the behavior of associated types][sound]. See [RFC 1214]. Although
4392 we have mostly introduced these changes as warnings this release, to
4393 become errors next release, there are still some scenarios that will
4394 see immediate breakage.
4395 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
4396 line breaks in addition to `\n`][crlf].
4397 * [Loans of `'static` lifetime extend to the end of a function][stat].
4398 * [`str::parse` no longer introduces avoidable rounding error when
4399 parsing floating point numbers. Together with earlier changes to
4400 float formatting/output, "round trips" like f.to_string().parse()
4401 now preserve the value of f exactly. Additionally, leading plus
4402 signs are now accepted][fp3].
4408 * `use` statements that import multiple items [can now rename
4409 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
4410 * [Binops work correctly on fat pointers][binfat].
4411 * `pub extern crate`, which does not behave as expected, [issues a
4412 warning][pec] until a better solution is found.
4417 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
4418 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
4419 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
4420 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
4421 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
4422 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
4423 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
4424 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
4425 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
4426 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
4427 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
4428 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
4429 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
4430 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
4431 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
4432 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
4433 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
4434 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
4436 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
4437 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
4438 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
4439 `f64::from_str_radix`.
4440 * [Reverse-searching strings is faster with the 'two-way'
4442 * [`std::io::copy` allows `?Sized` arguments][cc].
4443 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
4444 [override `count`, `nth` and `last` with an O(1)
4445 implementation][it].
4446 * [`Default` is implemented for arrays up to `[T; 32]`][d].
4447 * [`IntoRawFd` has been added to the Unix-specific prelude,
4448 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
4450 * [`Extend<String>` and `FromIterator<String` are both implemented for
4452 * [`IntoIterator` is implemented for references to `Option` and
4454 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
4455 Copy`][ext] as part of [RFC 839]. This will cause type inference
4456 breakage in rare situations.
4457 * [`BinaryHeap` implements `Debug`][bh2].
4458 * [`Borrow` and `BorrowMut` are implemented for fixed-size
4460 * [`extern fn`s with the "Rust" and "C" ABIs implement common
4461 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
4462 * [String comparison is faster][faststr].
4463 * `&mut T` where `T: std::fmt::Write` [also implements
4464 `std::fmt::Write`][mutw].
4465 * [A stable regression in `VecDeque::push_back` and other
4466 capacity-altering methods that caused panics for zero-sized types
4468 * [Function pointers implement traits for up to 12 parameters][fp2].
4473 * The compiler [no longer uses the 'morestack' feature to prevent
4474 stack overflow][mm]. Instead it uses guard pages and stack
4475 probes (though stack probes are not yet implemented on any platform
4477 * [The compiler matches traits faster when projections are involved][p].
4478 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
4480 * [Cargo now displays useful information about what its doing during
4481 `cargo update`][cu].
4483 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
4484 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
4485 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
4486 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
4487 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
4488 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
4489 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
4490 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
4491 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
4492 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
4493 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
4494 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
4495 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
4496 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
4497 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
4498 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
4499 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
4500 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
4501 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4502 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4503 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4504 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4505 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4506 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4507 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4508 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4509 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
4510 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
4511 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
4512 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
4513 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
4514 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
4515 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
4516 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
4517 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
4518 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
4519 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
4520 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
4521 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
4522 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
4523 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
4524 [bh2]: https://github.com/rust-lang/rust/pull/28156
4525 [binfat]: https://github.com/rust-lang/rust/pull/28270
4526 [bm]: https://github.com/rust-lang/rust/pull/28197
4527 [cc]: https://github.com/rust-lang/rust/pull/27531
4528 [crlf]: https://github.com/rust-lang/rust/pull/28034
4529 [cu]: https://github.com/rust-lang/cargo/pull/1931
4530 [d]: https://github.com/rust-lang/rust/pull/27825
4531 [dep]: https://github.com/rust-lang/rust/pull/28339
4532 [es]: https://github.com/rust-lang/rust/pull/27956
4533 [ext]: https://github.com/rust-lang/rust/pull/28094
4534 [faststr]: https://github.com/rust-lang/rust/pull/28338
4535 [ffi]: https://github.com/rust-lang/rust/pull/28779
4536 [fp]: https://github.com/rust-lang/rust/pull/28268
4537 [fp2]: https://github.com/rust-lang/rust/pull/28560
4538 [fp3]: https://github.com/rust-lang/rust/pull/27307
4539 [i]: https://github.com/rust-lang/rust/pull/27451
4540 [into2]: https://github.com/rust-lang/rust/pull/28039
4541 [it]: https://github.com/rust-lang/rust/pull/27652
4542 [mm]: https://github.com/rust-lang/rust/pull/27338
4543 [mutw]: https://github.com/rust-lang/rust/pull/28368
4544 [sound]: https://github.com/rust-lang/rust/pull/27641
4545 [p]: https://github.com/rust-lang/rust/pull/27866
4546 [pec]: https://github.com/rust-lang/rust/pull/28486
4547 [pr]: https://github.com/rust-lang/rust/pull/27896
4548 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4549 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4550 [s]: https://github.com/rust-lang/rust/pull/27474
4551 [stab]: https://github.com/rust-lang/rust/pull/28339
4552 [stat]: https://github.com/rust-lang/rust/pull/28321
4553 [vd]: https://github.com/rust-lang/rust/pull/28494
4555 Version 1.3.0 (2015-09-17)
4556 ==============================
4558 * ~900 changes, numerous bugfixes
4563 * The [new object lifetime defaults][nold] have been [turned
4564 on][nold2] after a cycle of warnings about the change. Now types
4565 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
4566 being interpreted as `&'a Box<Trait+'a>` to `&'a
4567 Box<Trait+'static>`.
4568 * [The Rustonomicon][nom] is a new book in the official documentation
4569 that dives into writing unsafe Rust.
4570 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
4571 timekeeping is employed by other std APIs, as well as out-of-tree
4577 * The [new object lifetime defaults][nold] have been [turned
4578 on][nold2] after a cycle of warnings about the change.
4579 * There is a known [regression][lr] in how object lifetime elision is
4580 interpreted, the proper solution for which is undetermined.
4581 * The `#[prelude_import]` attribute, an internal implementation
4582 detail, was accidentally stabilized previously. [It has been put
4583 behind the `prelude_import` feature gate][pi]. This change is
4584 believed to break no existing code.
4585 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4586 [more sane for dynamically sized types][dst3]. Code that relied on
4587 the previous behavior is thought to be broken.
4588 * The `dropck` rules, which checks that destructors can't access
4589 destroyed values, [have been updated][dropck] to match the
4590 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
4591 cause some previously-compiling code to no longer build.
4596 * The [new object lifetime defaults][nold] have been [turned
4597 on][nold2] after a cycle of warnings about the change.
4598 * Semicolons may [now follow types and paths in
4599 macros](https://github.com/rust-lang/rust/pull/27000).
4600 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4601 [more sane for dynamically sized types][dst3]. Code that relied on
4602 the previous behavior is not known to exist, and suspected to be
4604 * `'static` variables [may now be recursive][st].
4605 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
4606 implementations correctly.
4607 * The `dropck` rules, which checks that destructors can't access
4608 destroyed values, [have been updated][dropck] to match the
4614 * The [`Duration`] API, [has been stabilized][ds], as well as the
4615 `std::time` module, which presently contains only `Duration`.
4616 * `Box<str>` and `Box<[T]>` both implement `Clone`.
4617 * The owned C string, [`CString`], implements [`Borrow`] and the
4618 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
4619 these allow C strings to be borrowed and cloned in generic code.
4620 * [`CStr`] implements [`Debug`].
4621 * [`AtomicPtr`] implements [`Debug`].
4622 * [`Error`] trait objects [can be downcast to their concrete types][e]
4623 in many common configurations, using the [`is`], [`downcast`],
4624 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
4626 * Searching for substrings now [employs the two-way algorithm][search]
4627 instead of doing a naive search. This gives major speedups to a
4628 number of methods, including [`contains`][sc], [`find`][sf],
4629 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
4630 [`ends_with`][sew] are also faster.
4631 * The performance of `PartialEq` for slices is [much faster][ps].
4632 * The [`Hash`] trait offers the default method, [`hash_slice`], which
4633 is overridden and optimized by the implementations for scalars.
4634 * The [`Hasher`] trait now has a number of specialized `write_*`
4635 methods for primitive types, for efficiency.
4636 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
4637 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
4638 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
4639 of [`std::error::Error::cause`][iec] also delegates to the inner
4641 * [`process::Child`][pc] gained the [`id`] method, which returns a
4642 `u32` representing the platform-specific process identifier.
4643 * The [`connect`] method on slices is deprecated, replaced by the new
4644 [`join`] method (note that both of these are on the *unstable*
4645 [`SliceConcatExt`] trait, but through the magic of the prelude are
4646 available to stable code anyway).
4647 * The [`Div`] operator is implemented for [`Wrapping`] types.
4648 * [`DerefMut` is implemented for `String`][dms].
4649 * Performance of SipHash (the default hasher for `HashMap`) is
4650 [better for long data][sh].
4651 * [`AtomicPtr`] implements [`Send`].
4652 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
4653 are now [specialized to use uninitialized buffers for increased
4655 * Lifetime parameters of foreign functions [are now resolved
4661 * Rust can now, with some coercion, [produce programs that run on
4662 Windows XP][xp], though XP is not considered a supported platform.
4663 * Porting Rust on Windows from the GNU toolchain to MSVC continues
4664 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
4665 recommended for use in 1.3, though should be fully-functional
4666 in the [64-bit 1.4 beta][b14].
4667 * On Fedora-based systems installation will [properly configure the
4668 dynamic linker][fl].
4669 * The compiler gained many new extended error descriptions, which can
4670 be accessed with the `--explain` flag.
4671 * The `dropck` pass, which checks that destructors can't access
4672 destroyed values, [has been rewritten][dropck]. This fixes some
4673 soundness holes, and as such will cause some previously-compiling
4674 code to no longer build.
4675 * `rustc` now uses [LLVM to write archive files where possible][ar].
4676 Eventually this will eliminate the compiler's dependency on the ar
4678 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
4679 supported FreeBSD on x86_64).
4680 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
4681 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
4683 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
4684 will kill the process instead of leaking][nlp].
4686 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
4687 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
4688 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
4689 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
4690 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
4691 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4692 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4693 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
4694 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
4695 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
4696 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
4697 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
4698 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
4699 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4700 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
4701 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
4702 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
4703 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
4704 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4705 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
4706 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
4707 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
4708 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
4709 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4710 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
4711 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
4712 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
4713 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
4714 [ar]: https://github.com/rust-lang/rust/pull/26926
4715 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
4716 [dms]: https://github.com/rust-lang/rust/pull/26241
4717 [dropck]: https://github.com/rust-lang/rust/pull/27261
4718 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4719 [ds]: https://github.com/rust-lang/rust/pull/26818
4720 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
4721 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
4722 [dst3]: https://github.com/rust-lang/rust/pull/27351
4723 [e]: https://github.com/rust-lang/rust/pull/24793
4724 [f]: https://github.com/rust-lang/rust/pull/26588
4725 [fb]: https://github.com/rust-lang/rust/pull/26959
4726 [fl]: https://github.com/rust-lang/rust-installer/pull/41
4727 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4728 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
4729 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
4730 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
4731 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
4732 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
4733 [lic]: https://github.com/rust-lang/rust/pull/26583
4734 [lnu]: https://github.com/rust-lang/rust/pull/27026
4735 [lr]: https://github.com/rust-lang/rust/issues/27248
4736 [lum]: https://github.com/rust-lang/rust/pull/26378
4737 [lur]: https://github.com/rust-lang/rust/pull/26783
4738 [nlp]: https://github.com/rust-lang/rust/pull/27176
4739 [nold2]: https://github.com/rust-lang/rust/pull/27045
4740 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
4741 [nom]: http://doc.rust-lang.org/nightly/nomicon/
4742 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
4743 [pi]: https://github.com/rust-lang/rust/pull/26699
4744 [ps]: https://github.com/rust-lang/rust/pull/26884
4745 [rte]: https://github.com/rust-lang/rust/pull/26950
4746 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
4747 [search]: https://github.com/rust-lang/rust/pull/26327
4748 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
4749 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
4750 [sh]: https://github.com/rust-lang/rust/pull/27280
4751 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
4752 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
4753 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
4754 [st]: https://github.com/rust-lang/rust/pull/26630
4755 [win1]: https://github.com/rust-lang/rust/pull/26569
4756 [win2]: https://github.com/rust-lang/rust/pull/26741
4757 [win3]: https://github.com/rust-lang/rust/pull/26741
4758 [win4]: https://github.com/rust-lang/rust/pull/27210
4759 [xp]: https://github.com/rust-lang/rust/pull/26569
4761 Version 1.2.0 (2015-08-07)
4762 ==========================
4764 * ~1200 changes, numerous bugfixes
4769 * [Dynamically-sized-type coercions][dst] allow smart pointer types
4770 like `Rc` to contain types without a fixed size, arrays and trait
4771 objects, finally enabling use of `Rc<[T]>` and completing the
4772 implementation of DST.
4773 * [Parallel codegen][parcodegen] is now working again, which can
4774 substantially speed up large builds in debug mode; It also gets
4775 another ~33% speedup when bootstrapping on a 4 core machine (using 8
4776 jobs). It's not enabled by default, but will be "in the near
4777 future". It can be activated with the `-C codegen-units=N` flag to
4779 * This is the first release with [experimental support for linking
4780 with the MSVC linker and lib C on Windows (instead of using the GNU
4781 variants via MinGW)][win]. It is yet recommended only for the most
4782 intrepid Rustaceans.
4783 * Benchmark compilations are showing a 30% improvement in
4784 bootstrapping over 1.1.
4789 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
4790 unicode case mapping, which is a previously-planned change in
4791 behavior and considered a bugfix.
4792 * [`mem::align_of`] now specifies [the *minimum alignment* for
4793 T][align], which is usually the alignment programs are interested
4794 in, and the same value reported by clang's
4795 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
4797 * [The `#[packed]` attribute is no longer silently accepted by the
4798 compiler][packed]. This attribute did nothing and code that
4799 mentioned it likely did not work as intended.
4800 * Associated type defaults are [now behind the
4801 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
4802 defaults *did not work*, but could be mentioned syntactically. As
4803 such this breakage has minimal impact.
4808 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
4809 matching against dereferenceable values.
4814 * The [`Extend`] trait, which grows a collection from an iterator, is
4815 implemented over iterators of references, for `String`, `Vec`,
4816 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
4817 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
4818 * The [`iter::once`] function returns an iterator that yields a single
4819 element, and [`iter::empty`] returns an iterator that yields no
4821 * The [`matches`] and [`rmatches`] methods on `str` return iterators
4822 over substring matches.
4823 * [`Cell`] and [`RefCell`] both implement `Eq`.
4824 * A number of methods for wrapping arithmetic are added to the
4825 integral types, [`wrapping_div`], [`wrapping_rem`],
4826 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
4827 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
4828 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
4829 type.. It is illegal for the default arithmetic operations in Rust
4830 to overflow; the desire to wrap must be explicit.
4831 * The `{:#?}` formatting specifier [displays the alternate,
4832 pretty-printed][debugfmt] form of the `Debug` formatter. This
4833 feature was actually introduced prior to 1.0 with little
4835 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
4836 for writing data to formatted strings, similar to [`io::Write`].
4837 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
4838 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
4839 are used by code generators to emit implementations of [`Debug`].
4840 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
4841 methods that convert case, following Unicode case mapping.
4842 * It is now easier to handle poisoned locks. The [`PoisonError`]
4843 type, returned by failing lock operations, exposes `into_inner`,
4844 `get_ref`, and `get_mut`, which all give access to the inner lock
4845 guard, and allow the poisoned lock to continue to operate. The
4846 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
4847 poisoned lock without attempting to take the lock.
4848 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
4849 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
4850 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
4851 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
4853 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
4859 * `rustc` employs smarter heuristics for guessing at [typos].
4860 * `rustc` emits more efficient code for [no-op conversions between
4861 unsafe pointers][nop].
4862 * Fat pointers are now [passed in pairs of immediate arguments][fat],
4863 resulting in faster compile times and smaller code.
4865 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
4866 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4867 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
4868 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
4869 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
4870 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
4871 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
4872 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
4873 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
4874 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
4875 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
4876 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
4877 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
4878 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
4879 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
4880 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
4881 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4882 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
4883 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
4884 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
4885 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
4886 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
4887 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
4888 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
4889 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
4890 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4891 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
4892 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
4893 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
4894 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
4895 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
4896 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
4897 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
4898 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4899 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4900 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
4901 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
4902 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
4903 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
4904 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
4905 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
4906 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4907 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
4908 [align]: https://github.com/rust-lang/rust/pull/25646
4909 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
4910 [typos]: https://github.com/rust-lang/rust/pull/26087
4911 [nop]: https://github.com/rust-lang/rust/pull/26336
4912 [fat]: https://github.com/rust-lang/rust/pull/26411
4913 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
4914 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
4915 [packed]: https://github.com/rust-lang/rust/pull/25541
4916 [ad]: https://github.com/rust-lang/rust/pull/27382
4917 [win]: https://github.com/rust-lang/rust/pull/25350
4919 Version 1.1.0 (2015-06-25)
4920 =========================
4922 * ~850 changes, numerous bugfixes
4927 * The [`std::fs` module has been expanded][fs] to expand the set of
4928 functionality exposed:
4929 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
4930 don't incur a syscall on some platforms.
4931 * A `symlink_metadata` function has been added.
4932 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
4933 access to all underlying information.
4934 * The compiler now contains extended explanations of many errors. When an error
4935 with an explanation occurs the compiler suggests using the `--explain` flag
4936 to read the explanation. Error explanations are also [available online][err-index].
4937 * Thanks to multiple [improvements][sk] to [type checking][pre], as
4938 well as other work, the time to bootstrap the compiler decreased by
4944 * The [`str::split_whitespace`] method splits a string on unicode
4945 whitespace boundaries.
4946 * On both Windows and Unix, new extension traits provide conversion of
4947 I/O types to and from the underlying system handles. On Unix, these
4948 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
4949 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
4950 `TcpListener`, and `UpdSocket`. Further implementations for
4951 `std::process` will be stabilized later.
4952 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
4953 Windows, symlinks can be created with
4954 `std::os::windows::symlink_dir` and
4955 `std::os::windows::symlink_file`.
4956 * The `mpsc::Receiver` type can now be converted into an iterator with
4957 `into_iter` on the [`IntoIterator`] trait.
4958 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
4959 implementation of the [`From`] trait.
4960 * The `Debug` implementation for `RangeFull` [creates output that is
4961 more consistent with other implementations][rf].
4962 * [`Debug` is implemented for `File`][file].
4963 * The `Default` implementation for `Arc` [no longer requires `Sync +
4965 * [The `Iterator` methods `count`, `nth`, and `last` have been
4966 overridden for slices to have O(1) performance instead of O(n)][si].
4967 * Incorrect handling of paths on Windows has been improved in both the
4968 compiler and the standard library.
4969 * [`AtomicPtr` gained a `Default` implementation][ap].
4970 * In accordance with Rust's policy on arithmetic overflow `abs` now
4971 [panics on overflow when debug assertions are enabled][abs].
4972 * The [`Cloned`] iterator, which was accidentally left unstable for
4973 1.0 [has been stabilized][c].
4974 * The [`Incoming`] iterator, which iterates over incoming TCP
4975 connections, and which was accidentally unnamable in 1.0, [is now
4976 properly exported][inc].
4977 * [`BinaryHeap`] no longer corrupts itself [when functions called by
4978 `sift_up` or `sift_down` panic][bh].
4979 * The [`split_off`] method of `LinkedList` [no longer corrupts
4980 the list in certain scenarios][ll].
4985 * Type checking performance [has improved notably][sk] with
4986 [multiple improvements][pre].
4987 * The compiler [suggests code changes][ch] for more errors.
4988 * rustc and it's build system have experimental support for [building
4989 toolchains against MUSL][m] instead of glibc on Linux.
4990 * The compiler defines the `target_env` cfg value, which is used for
4991 distinguishing toolchains that are otherwise for the same
4992 platform. Presently this is set to `gnu` for common GNU Linux
4993 targets and for MinGW targets, and `musl` for MUSL Linux targets.
4994 * The [`cargo rustc`][crc] command invokes a build with custom flags
4996 * [Android executables are always position independent][pie].
4997 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
5000 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
5001 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
5002 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
5003 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
5004 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
5005 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
5006 [rf]: https://github.com/rust-lang/rust/pull/24491
5007 [err-index]: https://doc.rust-lang.org/error-index.html
5008 [sk]: https://github.com/rust-lang/rust/pull/24615
5009 [pre]: https://github.com/rust-lang/rust/pull/25323
5010 [file]: https://github.com/rust-lang/rust/pull/24598
5011 [ch]: https://github.com/rust-lang/rust/pull/24683
5012 [arc]: https://github.com/rust-lang/rust/pull/24695
5013 [si]: https://github.com/rust-lang/rust/pull/24701
5014 [ap]: https://github.com/rust-lang/rust/pull/24834
5015 [m]: https://github.com/rust-lang/rust/pull/24777
5016 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
5017 [crc]: https://github.com/rust-lang/cargo/pull/1568
5018 [pie]: https://github.com/rust-lang/rust/pull/24953
5019 [abs]: https://github.com/rust-lang/rust/pull/25441
5020 [c]: https://github.com/rust-lang/rust/pull/25496
5021 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
5022 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
5023 [inc]: https://github.com/rust-lang/rust/pull/25522
5024 [bh]: https://github.com/rust-lang/rust/pull/25856
5025 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
5026 [ll]: https://github.com/rust-lang/rust/pull/26022
5027 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
5028 [drop]: https://github.com/rust-lang/rust/pull/24935
5030 Version 1.0.0 (2015-05-15)
5031 ========================
5033 * ~1500 changes, numerous bugfixes
5038 * The vast majority of the standard library is now `#[stable]`. It is
5039 no longer possible to use unstable features with a stable build of
5041 * Many popular crates on [crates.io] now work on the stable release
5043 * Arithmetic on basic integer types now [checks for overflow in debug
5049 * Several [restrictions have been added to trait coherence][coh] in
5050 order to make it easier for upstream authors to change traits
5051 without breaking downstream code.
5052 * Digits of binary and octal literals are [lexed more eagerly][lex] to
5053 improve error messages and macro behavior. For example, `0b1234` is
5054 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
5055 * Trait bounds [are always invariant][inv], eliminating the need for
5056 the `PhantomFn` and `MarkerTrait` lang items, which have been
5058 * ["-" is no longer a valid character in crate names][cr], the `extern crate
5059 "foo" as bar` syntax has been replaced with `extern crate foo as
5060 bar`, and Cargo now automatically translates "-" in *package* names
5061 to underscore for the crate name.
5062 * [Lifetime shadowing is an error][lt].
5063 * [`Send` no longer implies `'static`][send-rfc].
5064 * [UFCS now supports trait-less associated paths][moar-ufcs] like
5065 `MyType::default()`.
5066 * Primitive types [now have inherent methods][prim-inherent],
5067 obviating the need for extension traits like `SliceExt`.
5068 * Methods with `Self: Sized` in their `where` clause are [considered
5069 object-safe][self-sized], allowing many extension traits like
5070 `IteratorExt` to be merged into the traits they extended.
5071 * You can now [refer to associated types][assoc-where] whose
5072 corresponding trait bounds appear only in a `where` clause.
5073 * The final bits of [OIBIT landed][oibit-final], meaning that traits
5074 like `Send` and `Sync` are now library-defined.
5075 * A [Reflect trait][reflect] was introduced, which means that
5076 downcasting via the `Any` trait is effectively limited to concrete
5077 types. This helps retain the potentially-important "parametricity"
5078 property: generic code cannot behave differently for different type
5079 arguments except in minor ways.
5080 * The `unsafe_destructor` feature is now deprecated in favor of the
5081 [new `dropck`][dropck]. This change is a major reduction in unsafe
5087 * The `thread_local` module [has been renamed to `std::thread`][th].
5088 * The methods of `IteratorExt` [have been moved to the `Iterator`
5090 * Several traits that implement Rust's conventions for type
5091 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
5092 [centralized in the `std::convert` module][con].
5093 * The `FromError` trait [was removed in favor of `From`][fe].
5094 * The basic sleep function [has moved to
5095 `std::thread::sleep_ms`][slp].
5096 * The `splitn` function now takes an `n` parameter that represents the
5097 number of items yielded by the returned iterator [instead of the
5098 number of 'splits'][spl].
5099 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
5100 * [Derived implementations of `PartialOrd` now order enums according
5101 to their explicitly-assigned discriminants][po].
5102 * [Methods for searching strings are generic over `Pattern`s][pat],
5103 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
5105 * [In method resolution, object methods are resolved before inherent
5107 * [`String::from_str` has been deprecated in favor of the `From` impl,
5108 `String::from`][sf].
5109 * [`io::Error` implements `Sync`][ios].
5110 * [The `words` method on `&str` has been replaced with
5111 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
5113 * The new path and IO modules are complete and `#[stable]`. This
5114 was the major library focus for this cycle.
5115 * The path API was [revised][path-normalize] to normalize `.`,
5116 adjusting the tradeoffs in favor of the most common usage.
5117 * A large number of remaining APIs in `std` were also stabilized
5118 during this cycle; about 75% of the non-deprecated API surface
5120 * The new [string pattern API][string-pattern] landed, which makes
5121 the string slice API much more internally consistent and flexible.
5122 * A new set of [generic conversion traits][conversion] replaced
5123 many existing ad hoc traits.
5124 * Generic numeric traits were [completely removed][num-traits]. This
5125 was made possible thanks to inherent methods for primitive types,
5126 and the removal gives maximal flexibility for designing a numeric
5127 hierarchy in the future.
5128 * The `Fn` traits are now related via [inheritance][fn-inherit]
5129 and provide ergonomic [blanket implementations][fn-blanket].
5130 * The `Index` and `IndexMut` traits were changed to
5131 [take the index by value][index-value], enabling code like
5132 `hash_map["string"]` to work.
5133 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
5134 `Copy` data is known to be `Clone` as well.
5139 * Many errors now have extended explanations that can be accessed with
5140 the `--explain` flag to `rustc`.
5141 * Many new examples have been added to the standard library
5143 * rustdoc has received a number of improvements focused on completion
5145 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
5146 * Much headway was made on ecosystem-wide CI, making it possible
5147 to [compare builds for breakage][ci-compare].
5150 [crates.io]: http://crates.io
5151 [clo]: https://github.com/rust-lang/rust/pull/24034
5152 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
5153 [con]: https://github.com/rust-lang/rust/pull/23875
5154 [cr]: https://github.com/rust-lang/rust/pull/23419
5155 [fe]: https://github.com/rust-lang/rust/pull/23879
5156 [ie]: https://github.com/rust-lang/rust/pull/23300
5157 [inv]: https://github.com/rust-lang/rust/pull/23938
5158 [ios]: https://github.com/rust-lang/rust/pull/24133
5159 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
5160 [lt]: https://github.com/rust-lang/rust/pull/24057
5161 [meth]: https://github.com/rust-lang/rust/pull/24056
5162 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
5163 [po]: https://github.com/rust-lang/rust/pull/24270
5164 [sf]: https://github.com/rust-lang/rust/pull/24517
5165 [slp]: https://github.com/rust-lang/rust/pull/23949
5166 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
5167 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
5168 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
5169 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
5170 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
5171 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
5172 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
5173 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
5174 [self-sized]: https://github.com/rust-lang/rust/pull/22301
5175 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
5176 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
5177 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
5178 [reflect]: https://github.com/rust-lang/rust/pull/23712
5179 [conversion]: https://github.com/rust-lang/rfcs/pull/529
5180 [num-traits]: https://github.com/rust-lang/rust/pull/23549
5181 [index-value]: https://github.com/rust-lang/rust/pull/23601
5182 [dropck]: https://github.com/rust-lang/rfcs/pull/769
5183 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
5184 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
5185 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
5186 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
5187 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
5190 Version 1.0.0-alpha.2 (2015-02-20)
5191 =====================================
5193 * ~1300 changes, numerous bugfixes
5197 * The various I/O modules were [overhauled][io-rfc] to reduce
5198 unnecessary abstractions and provide better interoperation with
5199 the underlying platform. The old `io` module remains temporarily
5201 * The standard library now [participates in feature gating][feat],
5202 so use of unstable libraries now requires a `#![feature(...)]`
5203 attribute. The impact of this change is [described on the
5204 forum][feat-forum]. [RFC][feat-rfc].
5208 * `for` loops [now operate on the `IntoIterator` trait][into],
5209 which eliminates the need to call `.iter()`, etc. to iterate
5210 over collections. There are some new subtleties to remember
5211 though regarding what sort of iterators various types yield, in
5212 particular that `for foo in bar { }` yields values from a move
5213 iterator, destroying the original collection. [RFC][into-rfc].
5214 * Objects now have [default lifetime bounds][obj], so you don't
5215 have to write `Box<Trait+'static>` when you don't care about
5216 storing references. [RFC][obj-rfc].
5217 * In types that implement `Drop`, [lifetimes must outlive the
5218 value][drop]. This will soon make it possible to safely
5219 implement `Drop` for types where `#[unsafe_destructor]` is now
5220 required. Read the [gorgeous RFC][drop-rfc] for details.
5221 * The fully qualified <T as Trait>::X syntax lets you set the Self
5222 type for a trait method or associated type. [RFC][ufcs-rfc].
5223 * References to types that implement `Deref<U>` now [automatically
5224 coerce to references][deref] to the dereferenced type `U`,
5225 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
5226 should eliminate many unsightly uses of `&*`, as when converting
5227 from references to vectors into references to
5228 slices. [RFC][deref-rfc].
5229 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
5230 `|:|`) is obsolete and closure kind is inferred from context.
5231 * [`Self` is a keyword][Self].
5235 * The `Show` and `String` formatting traits [have been
5236 renamed][fmt] to `Debug` and `Display` to more clearly reflect
5237 their related purposes. Automatically getting a string
5238 conversion to use with `format!("{:?}", something_to_debug)` is
5239 now written `#[derive(Debug)]`.
5240 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
5241 OsStr}`, provide strings in platform-specific encodings for easier
5242 interop with system APIs. [RFC][osstr-rfc].
5243 * The `boxed::into_raw` and `Box::from_raw` functions [convert
5244 between `Box<T>` and `*mut T`][boxraw], a common pattern for
5245 creating raw pointers.
5249 * Certain long error messages of the form 'expected foo found bar'
5250 are now [split neatly across multiple
5251 lines][multiline]. Examples in the PR.
5252 * On Unix Rust can be [uninstalled][un] by running
5253 `/usr/local/lib/rustlib/uninstall.sh`.
5254 * The `#[rustc_on_unimplemented]` attribute, requiring the
5255 'on_unimplemented' feature, lets rustc [display custom error
5256 messages when a trait is expected to be implemented for a type
5261 * Rust is tested against a [LALR grammar][lalr], which parses
5262 almost all the Rust files that rustc does.
5264 [boxraw]: https://github.com/rust-lang/rust/pull/21318
5265 [close]: https://github.com/rust-lang/rust/pull/21843
5266 [deref]: https://github.com/rust-lang/rust/pull/21351
5267 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
5268 [drop]: https://github.com/rust-lang/rust/pull/21972
5269 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
5270 [feat]: https://github.com/rust-lang/rust/pull/21248
5271 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
5272 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
5273 [fmt]: https://github.com/rust-lang/rust/pull/21457
5274 [into]: https://github.com/rust-lang/rust/pull/20790
5275 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
5276 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5277 [lalr]: https://github.com/rust-lang/rust/pull/21452
5278 [multiline]: https://github.com/rust-lang/rust/pull/19870
5279 [obj]: https://github.com/rust-lang/rust/pull/22230
5280 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
5281 [onun]: https://github.com/rust-lang/rust/pull/20889
5282 [osstr]: https://github.com/rust-lang/rust/pull/21488
5283 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5284 [Self]: https://github.com/rust-lang/rust/pull/22158
5285 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
5286 [un]: https://github.com/rust-lang/rust/pull/22256
5289 Version 1.0.0-alpha (2015-01-09)
5290 ==================================
5292 * ~2400 changes, numerous bugfixes
5296 * The language itself is considered feature complete for 1.0,
5297 though there will be many usability improvements and bugfixes
5298 before the final release.
5299 * Nearly 50% of the public API surface of the standard library has
5300 been declared 'stable'. Those interfaces are unlikely to change
5302 * The long-running debate over integer types has been
5303 [settled][ints]: Rust will ship with types named `isize` and
5304 `usize`, rather than `int` and `uint`, for pointer-sized
5305 integers. Guidelines will be rolled out during the alpha cycle.
5306 * Most crates that are not `std` have been moved out of the Rust
5307 distribution into the Cargo ecosystem so they can evolve
5308 separately and don't need to be stabilized as quickly, including
5309 'time', 'getopts', 'num', 'regex', and 'term'.
5310 * Documentation continues to be expanded with more API coverage, more
5311 examples, and more in-depth explanations. The guides have been
5312 consolidated into [The Rust Programming Language][trpl].
5313 * "[Rust By Example][rbe]" is now maintained by the Rust team.
5314 * All official Rust binary installers now come with [Cargo], the
5315 Rust package manager.
5319 * Closures have been [completely redesigned][unboxed] to be
5320 implemented in terms of traits, can now be used as generic type
5321 bounds and thus monomorphized and inlined, or via an opaque
5322 pointer (boxed) as in the old system. The new system is often
5323 referred to as 'unboxed' closures.
5324 * Traits now support [associated types][assoc], allowing families
5325 of related types to be defined together and used generically in
5327 * Enum variants are [namespaced by their type names][enum].
5328 * [`where` clauses][where] provide a more versatile and attractive
5329 syntax for specifying generic bounds, though the previous syntax
5331 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
5333 * Rust [no longer has a runtime][rt] of any description, and only
5334 supports OS threads, not green threads.
5335 * At long last, Rust has been overhauled for 'dynamically-sized
5336 types' ([DST]), which integrates 'fat pointers' (object types,
5337 arrays, and `str`) more deeply into the type system, making it
5339 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
5340 `..j` that produce range types and which, when combined with the
5341 `Index` operator and multidispatch, leads to a convenient slice
5343 * The new range syntax revealed an ambiguity in the fixed-length
5344 array syntax, so now fixed length arrays [are written `[T;
5346 * The `Copy` trait is no longer implemented automatically. Unsafe
5347 pointers no longer implement `Sync` and `Send` so types
5348 containing them don't automatically either. `Sync` and `Send`
5349 are now 'unsafe traits' so one can "forcibly" implement them via
5350 `unsafe impl` if a type confirms to the requirements for them
5351 even though the internals do not (e.g. structs containing unsafe
5352 pointers like `Arc`). These changes are intended to prevent some
5353 footguns and are collectively known as [opt-in built-in
5354 traits][oibit] (though `Sync` and `Send` will soon become pure
5355 library types unknown to the compiler).
5356 * Operator traits now take their operands [by value][ops], and
5357 comparison traits can use multidispatch to compare one type
5358 against multiple other types, allowing e.g. `String` to be
5359 compared with `&str`.
5360 * `if let` and `while let` are no longer feature-gated.
5361 * Rust has adopted a more [uniform syntax for escaping unicode
5362 characters][unicode].
5363 * `macro_rules!` [has been declared stable][mac]. Though it is a
5364 flawed system it is sufficiently popular that it must be usable
5365 for 1.0. Effort has gone into [future-proofing][mac-future] it
5366 in ways that will allow other macro systems to be developed in
5367 parallel, and won't otherwise impact the evolution of the
5369 * The prelude has been [pared back significantly][prelude] such
5370 that it is the minimum necessary to support the most pervasive
5371 code patterns, and through [generalized where clauses][where]
5372 many of the prelude extension traits have been consolidated.
5373 * Rust's rudimentary reflection [has been removed][refl], as it
5374 incurred too much code generation for little benefit.
5375 * [Struct variants][structvars] are no longer feature-gated.
5376 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
5377 known as 'higher-ranked trait bounds', this crucially allows
5378 unboxed closures to work.
5379 * Macros invocations surrounded by parens or square brackets and
5380 not terminated by a semicolon are [parsed as
5381 expressions][macros], which makes expressions like `vec![1i32,
5382 2, 3].len()` work as expected.
5383 * Trait objects now implement their traits automatically, and
5384 traits that can be coerced to objects now must be [object
5386 * Automatically deriving traits is now done with `#[derive(...)]`
5387 not `#[deriving(...)]` for [consistency with other naming
5388 conventions][derive].
5389 * Importing the containing module or enum at the same time as
5390 items or variants they contain is [now done with `self` instead
5391 of `mod`][self], as in use `foo::{self, bar}`
5392 * Glob imports are no longer feature-gated.
5393 * The `box` operator and `box` patterns have been feature-gated
5394 pending a redesign. For now unique boxes should be allocated
5395 like other containers, with `Box::new`.
5399 * A [series][coll1] of [efforts][coll2] to establish
5400 [conventions][coll3] for collections types has resulted in API
5401 improvements throughout the standard library.
5402 * New [APIs for error handling][err] provide ergonomic interop
5403 between error types, and [new conventions][err-conv] describe
5404 more clearly the recommended error handling strategies in Rust.
5405 * The `fail!` macro has been renamed to [`panic!`][panic] so that
5406 it is easier to discuss failure in the context of error handling
5407 without making clarifications as to whether you are referring to
5408 the 'fail' macro or failure more generally.
5409 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
5410 syscall when available.
5411 * The 'serialize' crate has been renamed 'rustc-serialize' and
5412 moved out of the distribution to Cargo. Although it is widely
5413 used now, it is expected to be superseded in the near future.
5414 * The `Show` formatter, typically implemented with
5415 `#[derive(Show)]` is [now requested with the `{:?}`
5416 specifier][show] and is intended for use by all types, for uses
5417 such as `println!` debugging. The new `String` formatter must be
5418 implemented by hand, uses the `{}` specifier, and is intended
5419 for full-fidelity conversions of things that can logically be
5420 represented as strings.
5424 * [Flexible target specification][flex] allows rustc's code
5425 generation to be configured to support otherwise-unsupported
5427 * Rust comes with rust-gdb and rust-lldb scripts that launch their
5428 respective debuggers with Rust-appropriate pretty-printing.
5429 * The Windows installation of Rust is distributed with the
5430 MinGW components currently required to link binaries on that
5435 * Nullable enum optimizations have been extended to more types so
5436 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
5437 space than the inner types themselves.
5438 * Work has begun on supporting AArch64.
5440 [Cargo]: https://crates.io
5441 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
5442 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
5443 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
5444 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
5445 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
5446 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
5447 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
5448 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
5449 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
5450 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
5451 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
5452 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
5453 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
5454 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
5455 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
5456 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
5457 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
5458 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
5459 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
5460 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
5461 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
5462 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
5463 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
5464 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
5465 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
5466 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
5467 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
5468 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
5469 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
5470 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
5471 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
5472 [trpl]: https://doc.rust-lang.org/book/index.html
5473 [rbe]: http://rustbyexample.com/
5476 Version 0.12.0 (2014-10-09)
5477 =============================
5479 * ~1900 changes, numerous bugfixes
5483 * The introductory documentation (now called The Rust Guide) has
5484 been completely rewritten, as have a number of supplementary
5486 * Rust's package manager, Cargo, continues to improve and is
5487 sometimes considered to be quite awesome.
5488 * Many API's in `std` have been reviewed and updated for
5489 consistency with the in-development Rust coding
5490 guidelines. The standard library documentation tracks
5491 stabilization progress.
5492 * Minor libraries have been moved out-of-tree to the rust-lang org
5493 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
5494 be installed with Cargo.
5495 * Lifetime elision allows lifetime annotations to be left off of
5496 function declarations in many common scenarios.
5497 * Rust now works on 64-bit Windows.
5500 * Indexing can be overloaded with the `Index` and `IndexMut`
5502 * The `if let` construct takes a branch only if the `let` pattern
5503 matches, currently behind the 'if_let' feature gate.
5504 * 'where clauses', a more flexible syntax for specifying trait
5505 bounds that is more aesthetic, have been added for traits and
5506 free functions. Where clauses will in the future make it
5507 possible to constrain associated types, which would be
5508 impossible with the existing syntax.
5509 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
5510 the 'slicing_syntax' feature gate, and can be overloaded with
5511 the `Slice` or `SliceMut` traits.
5512 * The syntax for matching of sub-slices has been changed to use a
5513 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
5514 consistency with other uses of `..` and to future-proof
5515 potential additional uses of the syntax.
5516 * The syntax for matching inclusive ranges in patterns has changed
5517 from `0..3` to `0...4` to be consistent with the exclusive range
5519 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
5520 c]`) has been put behind the 'advanced_slice_patterns' feature
5521 gate and may be removed in the future.
5522 * Components of tuples and tuple structs can be extracted using
5523 the `value.0` syntax, currently behind the `tuple_indexing`
5525 * The `#[crate_id]` attribute is no longer supported; versioning
5526 is handled by the package manager.
5527 * Renaming crate imports are now written `extern crate foo as bar`
5528 instead of `extern crate bar = foo`.
5529 * Renaming use statements are now written `use foo as bar` instead
5531 * `let` and `match` bindings and argument names in macros are now
5533 * The new, more efficient, closure types ('unboxed closures') have
5534 been added under a feature gate, 'unboxed_closures'. These will
5535 soon replace the existing closure types, once higher-ranked
5536 trait lifetimes are added to the language.
5537 * `move` has been added as a keyword, for indicating closures
5538 that capture by value.
5539 * Mutation and assignment is no longer allowed in pattern guards.
5540 * Generic structs and enums can now have trait bounds.
5541 * The `Share` trait is now called `Sync` to free up the term
5542 'shared' to refer to 'shared reference' (the default reference
5544 * Dynamically-sized types have been mostly implemented,
5545 unifying the behavior of fat-pointer types with the rest of the
5547 * As part of dynamically-sized types, the `Sized` trait has been
5548 introduced, which qualifying types implement by default, and
5549 which type parameters expect by default. To specify that a type
5550 parameter does not need to be sized, write `<Sized? T>`. Most
5551 types are `Sized`, notable exceptions being unsized arrays
5552 (`[T]`) and trait types.
5553 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
5554 * Lifetime bounds can now be applied to type parameters and object
5556 * The old, reference counted GC type, `Gc<T>` which was once
5557 denoted by the `@` sigil, has finally been removed. GC will be
5558 revisited in the future.
5561 * Library documentation has been improved for a number of modules.
5562 * Bit-vectors, collections::bitv has been modernized.
5563 * The url crate is deprecated in favor of
5564 http://github.com/servo/rust-url, which can be installed with
5566 * Most I/O stream types can be cloned and subsequently closed from
5568 * A `std::time::Duration` type has been added for use in I/O
5569 methods that rely on timers, as well as in the 'time' crate's
5570 `Timespec` arithmetic.
5571 * The runtime I/O abstraction layer that enabled the green thread
5572 scheduler to do non-thread-blocking I/O has been removed, along
5573 with the libuv-based implementation employed by the green thread
5574 scheduler. This will greatly simplify the future I/O work.
5575 * `collections::btree` has been rewritten to have a more
5576 idiomatic and efficient design.
5579 * rustdoc output now indicates the stability levels of API's.
5580 * The `--crate-name` flag can specify the name of the crate
5581 being compiled, like `#[crate_name]`.
5582 * The `-C metadata` specifies additional metadata to hash into
5583 symbol names, and `-C extra-filename` specifies additional
5584 information to put into the output filename, for use by the
5585 package manager for versioning.
5586 * debug info generation has continued to improve and should be
5587 more reliable under both gdb and lldb.
5588 * rustc has experimental support for compiling in parallel
5589 using the `-C codegen-units` flag.
5590 * rustc no longer encodes rpath information into binaries by
5594 * Stack usage has been optimized with LLVM lifetime annotations.
5595 * Official Rust binaries on Linux are more compatible with older
5596 kernels and distributions, built on CentOS 5.10.
5599 Version 0.11.0 (2014-07-02)
5600 ==========================
5602 * ~1700 changes, numerous bugfixes
5605 * ~[T] has been removed from the language. This type is superseded by
5607 * ~str has been removed from the language. This type is superseded by
5609 * ~T has been removed from the language. This type is superseded by the
5611 * @T has been removed from the language. This type is superseded by the
5612 standard library's std::gc::Gc<T> type.
5613 * Struct fields are now all private by default.
5614 * Vector indices and shift amounts are both required to be a `uint`
5615 instead of any integral type.
5616 * Byte character, byte string, and raw byte string literals are now all
5617 supported by prefixing the normal literal with a `b`.
5618 * Multiple ABIs are no longer allowed in an ABI string
5619 * The syntax for lifetimes on closures/procedures has been tweaked
5620 slightly: `<'a>|A, B|: 'b + K -> T`
5621 * Floating point modulus has been removed from the language; however it
5622 is still provided by a library implementation.
5623 * Private enum variants are now disallowed.
5624 * The `priv` keyword has been removed from the language.
5625 * A closure can no longer be invoked through a &-pointer.
5626 * The `use foo, bar, baz;` syntax has been removed from the language.
5627 * The transmute intrinsic no longer works on type parameters.
5628 * Statics now allow blocks/items in their definition.
5629 * Trait bounds are separated from objects with + instead of : now.
5630 * Objects can no longer be read while they are mutably borrowed.
5631 * The address of a static is now marked as insignificant unless the
5632 #[inline(never)] attribute is placed it.
5633 * The #[unsafe_destructor] attribute is now behind a feature gate.
5634 * Struct literals are no longer allowed in ambiguous positions such as
5635 if, while, match, and for..in.
5636 * Declaration of lang items and intrinsics are now feature-gated by
5638 * Integral literals no longer default to `int`, and floating point
5639 literals no longer default to `f64`. Literals must be suffixed with an
5640 appropriate type if inference cannot determine the type of the
5642 * The Box<T> type is no longer implicitly borrowed to &mut T.
5643 * Procedures are now required to not capture borrowed references.
5646 * The standard library is now a "facade" over a number of underlying
5647 libraries. This means that development on the standard library should
5648 be speedier due to smaller crates, as well as a clearer line between
5650 * A new library, libcore, lives under the standard library's facade
5651 which is Rust's "0-assumption" library, suitable for embedded and
5652 kernel development for example.
5653 * A regex crate has been added to the standard distribution. This crate
5654 includes statically compiled regular expressions.
5655 * The unwrap/unwrap_err methods on Result require a Show bound for
5656 better error messages.
5657 * The return types of the std::comm primitives have been centralized
5658 around the Result type.
5659 * A number of I/O primitives have gained the ability to time out their
5661 * A number of I/O primitives have gained the ability to close their
5662 reading/writing halves to cancel pending operations.
5663 * Reverse iterator methods have been removed in favor of `rev()` on
5664 their forward-iteration counterparts.
5665 * A bitflags! macro has been added to enable easy interop with C and
5666 management of bit flags.
5667 * A debug_assert! macro is now provided which is disabled when
5668 `--cfg ndebug` is passed to the compiler.
5669 * A graphviz crate has been added for creating .dot files.
5670 * The std::cast module has been migrated into std::mem.
5671 * The std::local_data api has been migrated from freestanding functions
5672 to being based on methods.
5673 * The Pod trait has been renamed to Copy.
5674 * jemalloc has been added as the default allocator for types.
5675 * The API for allocating memory has been changed to use proper alignment
5676 and sized deallocation
5677 * Connecting a TcpStream or binding a TcpListener is now based on a
5678 string address and a u16 port. This allows connecting to a hostname as
5680 * The Reader trait now contains a core method, read_at_least(), which
5681 correctly handles many repeated 0-length reads.
5682 * The process-spawning API is now centered around a builder-style
5684 * The :? printing qualifier has been moved from the standard library to
5685 an external libdebug crate.
5686 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
5687 have been renamed to Eq/Ord.
5688 * The select/plural methods have been removed from format!. The escapes
5689 for { and } have also changed from \{ and \} to {{ and }},
5691 * The TaskBuilder API has been re-worked to be a true builder, and
5692 extension traits for spawning native/green tasks have been added.
5695 * All breaking changes to the language or libraries now have their
5696 commit message annotated with `[breaking-change]` to allow for easy
5697 discovery of breaking changes.
5698 * The compiler will now try to suggest how to annotate lifetimes if a
5699 lifetime-related error occurs.
5700 * Debug info continues to be improved greatly with general bug fixes and
5701 better support for situations like link time optimization (LTO).
5702 * Usage of syntax extensions when cross-compiling has been fixed.
5703 * Functionality equivalent to GCC & Clang's -ffunction-sections,
5704 -fdata-sections and --gc-sections has been enabled by default
5705 * The compiler is now stricter about where it will load module files
5706 from when a module is declared via `mod foo;`.
5707 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
5708 Syntax extensions are now discovered via a "plugin registrar" type
5709 which will be extended in the future to other various plugins.
5710 * Lints have been restructured to allow for dynamically loadable lints.
5711 * A number of rustdoc improvements:
5712 * The HTML output has been visually redesigned.
5713 * Markdown is now powered by hoedown instead of sundown.
5714 * Searching heuristics have been greatly improved.
5715 * The search index has been reduced in size by a great amount.
5716 * Cross-crate documentation via `pub use` has been greatly improved.
5717 * Primitive types are now hyperlinked and documented.
5718 * Documentation has been moved from static.rust-lang.org/doc to
5720 * A new sandbox, play.rust-lang.org, is available for running and
5721 sharing rust code examples on-line.
5722 * Unused attributes are now more robustly warned about.
5723 * The dead_code lint now warns about unused struct fields.
5724 * Cross-compiling to iOS is now supported.
5725 * Cross-compiling to mipsel is now supported.
5726 * Stability attributes are now inherited by default and no longer apply
5727 to intra-crate usage, only inter-crate usage.
5728 * Error message related to non-exhaustive match expressions have been
5732 Version 0.10 (2014-04-03)
5733 =========================
5735 * ~1500 changes, numerous bugfixes
5738 * A new RFC process is now in place for modifying the language.
5739 * Patterns with `@`-pointers have been removed from the language.
5740 * Patterns with unique vectors (`~[T]`) have been removed from the
5742 * Patterns with unique strings (`~str`) have been removed from the
5744 * `@str` has been removed from the language.
5745 * `@[T]` has been removed from the language.
5746 * `@self` has been removed from the language.
5747 * `@Trait` has been removed from the language.
5748 * Headers on `~` allocations which contain `@` boxes inside the type for
5749 reference counting have been removed.
5750 * The semantics around the lifetimes of temporary expressions have changed,
5751 see #3511 and #11585 for more information.
5752 * Cross-crate syntax extensions are now possible, but feature gated. See
5753 #11151 for more information. This includes both `macro_rules!` macros as
5754 well as syntax extensions such as `format!`.
5755 * New lint modes have been added, and older ones have been turned on to be
5757 * Unnecessary parentheses
5760 * Uppercase variables
5761 * Publicly visible private types
5762 * `#[deriving]` with raw pointers
5763 * Unsafe functions can no longer be coerced to closures.
5764 * Various obscure macros such as `log_syntax!` are now behind feature gates.
5765 * The `#[simd]` attribute is now behind a feature gate.
5766 * Visibility is no longer allowed on `extern crate` statements, and
5767 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
5768 * Trailing commas are now allowed in argument lists and tuple patterns.
5769 * The `do` keyword has been removed, it is now a reserved keyword.
5770 * Default type parameters have been implemented, but are feature gated.
5771 * Borrowed variables through captures in closures are now considered soundly.
5772 * `extern mod` is now `extern crate`
5773 * The `Freeze` trait has been removed.
5774 * The `Share` trait has been added for types that can be shared among
5776 * Labels in macros are now hygienic.
5777 * Expression/statement macro invocations can be delimited with `{}` now.
5778 * Treatment of types allowed in `static mut` locations has been tweaked.
5779 * The `*` and `.` operators are now overloadable through the `Deref` and
5781 * `~Trait` and `proc` no longer have `Send` bounds by default.
5782 * Partial type hints are now supported with the `_` type marker.
5783 * An `Unsafe` type was introduced for interior mutability. It is now
5784 considered undefined to transmute from `&T` to `&mut T` without using the
5786 * The #[linkage] attribute was implemented for extern statics/functions.
5787 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
5788 * `Pod` was renamed to `Copy`.
5791 * The `libextra` library has been removed. It has now been decomposed into
5792 component libraries with smaller and more focused nuggets of
5793 functionality. The full list of libraries can be found on the
5794 documentation index page.
5795 * std: `std::condition` has been removed. All I/O errors are now propagated
5796 through the `Result` type. In order to assist with error handling, a
5797 `try!` macro for unwrapping errors with an early return and a lint for
5798 unused results has been added. See #12039 for more information.
5799 * std: The `vec` module has been renamed to `slice`.
5800 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
5801 This will become the only growable vector in the future.
5802 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
5803 are now found at `std::io::BufferedReader` instead of
5804 `std::io::buffered::BufferedReader`.
5805 * std: `print` and `println` are no longer in the prelude, the `print!` and
5806 `println!` macros are intended to be used instead.
5807 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
5808 attempts to statically prevent cycles.
5809 * std: The standard distribution is adopting the policy of pushing failure
5810 to the user rather than failing in libraries. Many functions (such as
5811 `slice::last()`) now return `Option<T>` instead of `T` + failing.
5812 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
5813 deriving mode: `#[deriving(Show)]`.
5814 * std: `ToStr` is now implemented for all types implementing `Show`.
5815 * std: The formatting trait methods now take `&self` instead of `&T`
5816 * std: The `invert()` method on iterators has been renamed to `rev()`
5817 * std: `std::num` has seen a reduction in the genericity of its traits,
5818 consolidating functionality into a few core traits.
5819 * std: Backtraces are now printed on task failure if the environment
5820 variable `RUST_BACKTRACE` is present.
5821 * std: Naming conventions for iterators have been standardized. More details
5822 can be found on the wiki's style guide.
5823 * std: `eof()` has been removed from the `Reader` trait. Specific types may
5824 still implement the function.
5825 * std: Networking types are now cloneable to allow simultaneous reads/writes.
5826 * std: `assert_approx_eq!` has been removed
5827 * std: The `e` and `E` formatting specifiers for floats have been added to
5828 print them in exponential notation.
5829 * std: The `Times` trait has been removed
5830 * std: Indications of variance and opting out of builtin bounds is done
5831 through marker types in `std::kinds::marker` now
5832 * std: `hash` has been rewritten, `IterBytes` has been removed, and
5833 `#[deriving(Hash)]` is now possible.
5834 * std: `SharedChan` has been removed, `Sender` is now cloneable.
5835 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
5836 * std: `Chan::new` is now `channel()`.
5837 * std: A new synchronous channel type has been implemented.
5838 * std: A `select!` macro is now provided for selecting over `Receiver`s.
5839 * std: `hashmap` and `trie` have been moved to `libcollections`
5840 * std: `run` has been rolled into `io::process`
5841 * std: `assert_eq!` now uses `{}` instead of `{:?}`
5842 * std: The equality and comparison traits have seen some reorganization.
5843 * std: `rand` has moved to `librand`.
5844 * std: `to_{lower,upper}case` has been implemented for `char`.
5845 * std: Logging has been moved to `liblog`.
5846 * collections: `HashMap` has been rewritten for higher performance and less
5848 * native: The default runtime is now `libnative`. If `libgreen` is desired,
5849 it can be booted manually. The runtime guide has more information and
5851 * native: All I/O functionality except signals has been implemented.
5852 * green: Task spawning with `libgreen` has been optimized with stack caching
5853 and various trimming of code.
5854 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
5855 * sync: The `extra::sync` module has been updated to modern rust (and moved
5856 to the `sync` library), tweaking and improving various interfaces while
5857 dropping redundant functionality.
5858 * sync: A new `Barrier` type has been added to the `sync` library.
5859 * sync: An efficient mutex for native and green tasks has been implemented.
5860 * serialize: The `base64` module has seen some improvement. It treats
5861 newlines better, has non-string error values, and has seen general
5863 * fourcc: A `fourcc!` macro was introduced
5864 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
5865 hexadecimal literal.
5868 * `rustpkg` has been deprecated and removed from the main repository. Its
5869 replacement, `cargo`, is under development.
5870 * Nightly builds of rust are now available
5871 * The memory usage of rustc has been improved many times throughout this
5873 * The build process supports disabling rpath support for the rustc binary
5875 * Code generation has improved in some cases, giving more information to the
5876 LLVM optimization passes to enable more extensive optimizations.
5877 * Debuginfo compatibility with lldb on OSX has been restored.
5878 * The master branch is now gated on an android bot, making building for
5879 android much more reliable.
5880 * Output flags have been centralized into one `--emit` flag.
5881 * Crate type flags have been centralized into one `--crate-type` flag.
5882 * Codegen flags have been consolidated behind a `-C` flag.
5883 * Linking against outdated crates now has improved error messages.
5884 * Error messages with lifetimes will often suggest how to annotate the
5885 function to fix the error.
5886 * Many more types are documented in the standard library, and new guides
5888 * Many `rustdoc` improvements:
5889 * code blocks are syntax highlighted.
5890 * render standalone markdown files.
5891 * the --test flag tests all code blocks by default.
5892 * exported macros are displayed.
5893 * re-exported types have their documentation inlined at the location of the
5895 * search works across crates that have been rendered to the same output
5899 Version 0.9 (2014-01-09)
5900 ==========================
5902 * ~1800 changes, numerous bugfixes
5905 * The `float` type has been removed. Use `f32` or `f64` instead.
5906 * A new facility for enabling experimental features (feature gating) has
5907 been added, using the crate-level `#[feature(foo)]` attribute.
5908 * Managed boxes (@) are now behind a feature gate
5909 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
5910 standard library's `Gc` or `Rc` types instead.
5911 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
5912 * Jumping back to the top of a loop is now done with `continue` instead of
5914 * Strings can no longer be mutated through index assignment.
5915 * Raw strings can be created via the basic `r"foo"` syntax or with matched
5916 hash delimiters, as in `r###"foo"###`.
5917 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
5919 * The `&fn` type is now written `|args| -> ret` to match the literal form.
5920 * `@fn`s have been removed.
5921 * `do` only works with procs in order to make it obvious what the cost
5923 * Single-element tuple-like structs can no longer be dereferenced to
5924 obtain the inner value. A more comprehensive solution for overloading
5925 the dereference operator will be provided in the future.
5926 * The `#[link(...)]` attribute has been replaced with
5927 `#[crate_id = "name#vers"]`.
5928 * Empty `impl`s must be terminated with empty braces and may not be
5929 terminated with a semicolon.
5930 * Keywords are no longer allowed as lifetime names; the `self` lifetime
5931 no longer has any special meaning.
5932 * The old `fmt!` string formatting macro has been removed.
5933 * `printf!` and `printfln!` (old-style formatting) removed in favor of
5934 `print!` and `println!`.
5935 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
5936 * The `extern mod foo (name = "bar")` syntax has been removed. Use
5937 `extern mod foo = "bar"` instead.
5938 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
5939 * Macros can have attributes.
5940 * Macros can expand to items with attributes.
5941 * Macros can expand to multiple items.
5942 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
5943 * Comments may be nested.
5944 * Values automatically coerce to trait objects they implement, without
5946 * Enum discriminants are no longer an entire word but as small as needed to
5947 contain all the variants. The `repr` attribute can be used to override
5948 the discriminant size, as in `#[repr(int)]` for integer-sized, and
5949 `#[repr(C)]` to match C enums.
5950 * Non-string literals are not allowed in attributes (they never worked).
5951 * The FFI now supports variadic functions.
5952 * Octal numeric literals, as in `0o7777`.
5953 * The `concat!` syntax extension performs compile-time string concatenation.
5954 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
5955 removed as Rust no longer uses segmented stacks.
5956 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
5957 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
5958 not `*`; ignoring remaining fields of a struct is also done with `..`,
5959 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
5960 * `rustc` supports the "win64" calling convention via `extern "win64"`.
5961 * `rustc` supports the "system" calling convention, which defaults to the
5962 preferred convention for the target platform, "stdcall" on 32-bit Windows,
5964 * The `type_overflow` lint (default: warn) checks literals for overflow.
5965 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
5966 * The `attribute_usage` lint (default: warn) warns about unknown
5968 * The `unknown_features` lint (default: warn) warns about unknown
5970 * The `dead_code` lint (default: warn) checks for dead code.
5971 * Rust libraries can be linked statically to one another
5972 * `#[link_args]` is behind the `link_args` feature gate.
5973 * Native libraries are now linked with `#[link(name = "foo")]`
5974 * Native libraries can be statically linked to a rust crate
5975 (`#[link(name = "foo", kind = "static")]`).
5976 * Native OS X frameworks are now officially supported
5977 (`#[link(name = "foo", kind = "framework")]`).
5978 * The `#[thread_local]` attribute creates thread-local (not task-local)
5979 variables. Currently behind the `thread_local` feature gate.
5980 * The `return` keyword may be used in closures.
5981 * Types that can be copied via a memcpy implement the `Pod` kind.
5982 * The `cfg` attribute can now be used on struct fields and enum variants.
5985 * std: The `option` and `result` API's have been overhauled to make them
5986 simpler, more consistent, and more composable.
5987 * std: The entire `std::io` module has been replaced with one that is
5988 more comprehensive and that properly interfaces with the underlying
5989 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
5991 * std: `io::util` contains a number of useful implementations of
5992 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
5993 `ZeroReader`, `TeeReader`.
5994 * std: The reference counted pointer type `extra::rc` moved into std.
5995 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
5996 just a wrapper around it).
5997 * std: The `Either` type has been removed.
5998 * std: `fmt::Default` can be implemented for any type to provide default
5999 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
6000 * std: The `rand` API continues to be tweaked.
6001 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
6002 on failure in gdb, is now named `rust_fail`.
6003 * std: The `each_key` and `each_value` methods on `HashMap` have been
6004 replaced by the `keys` and `values` iterators.
6005 * std: Functions dealing with type size and alignment have moved from the
6006 `sys` module to the `mem` module.
6007 * std: The `path` module was written and API changed.
6008 * std: `str::from_utf8` has been changed to cast instead of allocate.
6009 * std: `starts_with` and `ends_with` methods added to vectors via the
6010 `ImmutableEqVector` trait, which is in the prelude.
6011 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
6012 if the index is out of bounds.
6013 * std: Task failure no longer propagates between tasks, as the model was
6014 complex, expensive, and incompatible with thread-based tasks.
6015 * std: The `Any` type can be used for dynamic typing.
6016 * std: `~Any` can be passed to the `fail!` macro and retrieved via
6018 * std: Methods that produce iterators generally do not have an `_iter`
6020 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
6021 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
6022 * std: `util::ignore` renamed to `prelude::drop`.
6023 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
6025 * std: `vec::raw` has seen a lot of cleanup and API changes.
6026 * std: The standard library no longer includes any C++ code, and very
6027 minimal C, eliminating the dependency on libstdc++.
6028 * std: Runtime scheduling and I/O functionality has been factored out into
6029 extensible interfaces and is now implemented by two different crates:
6030 libnative, for native threading and I/O; and libgreen, for green threading
6031 and I/O. This paves the way for using the standard library in more limited
6032 embedded environments.
6033 * std: The `comm` module has been rewritten to be much faster, have a
6034 simpler, more consistent API, and to work for both native and green
6036 * std: All libuv dependencies have been moved into the rustuv crate.
6037 * native: New implementations of runtime scheduling on top of OS threads.
6038 * native: New native implementations of TCP, UDP, file I/O, process spawning,
6040 * green: The green thread scheduler and message passing types are almost
6042 * extra: The `flatpipes` module had bitrotted and was removed.
6043 * extra: All crypto functions have been removed and Rust now has a policy of
6044 not reimplementing crypto in the standard library. In the future crypto
6045 will be provided by external crates with bindings to established libraries.
6046 * extra: `c_vec` has been modernized.
6047 * extra: The `sort` module has been removed. Use the `sort` method on
6051 * The `rust` and `rusti` commands have been removed, due to lack of
6053 * `rustdoc` was completely rewritten.
6054 * `rustdoc` can test code examples in documentation.
6055 * `rustpkg` can test packages with the argument, 'test'.
6056 * `rustpkg` supports arbitrary dependencies, including C libraries.
6057 * `rustc`'s support for generating debug info is improved again.
6058 * `rustc` has better error reporting for unbalanced delimiters.
6059 * `rustc`'s JIT support was removed due to bitrot.
6060 * Executables and static libraries can be built with LTO (-Z lto)
6061 * `rustc` adds a `--dep-info` flag for communicating dependencies to
6065 Version 0.8 (2013-09-26)
6066 ============================
6068 * ~2200 changes, numerous bugfixes
6071 * The `for` loop syntax has changed to work with the `Iterator` trait.
6072 * At long last, unwinding works on Windows.
6073 * Default methods are ready for use.
6074 * Many trait inheritance bugs fixed.
6075 * Owned and borrowed trait objects work more reliably.
6076 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
6077 * rustc can omit emission of code for the `debug!` macro if it is passed
6079 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
6080 for foo.rs, then foo/mod.rs, and will generate an error when both are
6082 * Strings no longer contain trailing nulls. The new `std::c_str` module
6083 provides new mechanisms for converting to C strings.
6084 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
6085 * The FFI has been overhauled such that foreign functions are called directly,
6086 instead of through a stack-switching wrapper.
6087 * Calling a foreign function must be done through a Rust function with the
6088 `#[fixed_stack_segment]` attribute.
6089 * The `externfn!` macro can be used to declare both a foreign function and
6090 a `#[fixed_stack_segment]` wrapper at once.
6091 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
6092 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
6093 * `priv` is disallowed everywhere except for struct fields and enum variants.
6094 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
6095 * `ref` bindings in irrefutable patterns work correctly now.
6096 * `char` is now prevented from containing invalid code points.
6097 * Casting to `bool` is no longer allowed.
6098 * `\0` is now accepted as an escape in chars and strings.
6099 * `yield` is a reserved keyword.
6100 * `typeof` is a reserved keyword.
6101 * Crates may be imported by URL with `extern mod foo = "url";`.
6102 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
6103 * Static vectors can be initialized with repeating elements,
6104 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
6105 * Static structs can be initialized with functional record update,
6106 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
6107 * `cfg!` can be used to conditionally execute code based on the crate
6108 configuration, similarly to `#[cfg(...)]`.
6109 * The `unnecessary_qualification` lint detects unneeded module
6110 prefixes (default: allow).
6111 * Arithmetic operations have been implemented on the SIMD types in
6112 `std::unstable::simd`.
6113 * Exchange allocation headers were removed, reducing memory usage.
6114 * `format!` implements a completely new, extensible, and higher-performance
6115 string formatting system. It will replace `fmt!`.
6116 * `print!` and `println!` write formatted strings (using the `format!`
6117 extension) to stdout.
6118 * `write!` and `writeln!` write formatted strings (using the `format!`
6119 extension) to the new Writers in `std::rt::io`.
6120 * The library section in which a function or static is placed may
6121 be specified with `#[link_section = "..."]`.
6122 * The `proto!` syntax extension for defining bounded message protocols
6124 * `macro_rules!` is hygienic for `let` declarations.
6125 * The `#[export_name]` attribute specifies the name of a symbol.
6126 * `unreachable!` can be used to indicate unreachable code, and fails
6130 * std: Transitioned to the new runtime, written in Rust.
6131 * std: Added an experimental I/O library, `rt::io`, based on the new
6133 * std: A new generic `range` function was added to the prelude, replacing
6134 `uint::range` and friends.
6135 * std: `range_rev` no longer exists. Since range is an iterator it can be
6136 reversed with `range(lo, hi).invert()`.
6137 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
6138 renamed to `unwrap_or`.
6139 * std: The `iterator` module was renamed to `iter`.
6140 * std: Integral types now support the `checked_add`, `checked_sub`, and
6141 `checked_mul` operations for detecting overflow.
6142 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
6144 * std: Methods are standardizing on conventions for casting methods:
6145 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
6147 * std: The `CString` type in `c_str` provides new ways to convert to and
6149 * std: `DoubleEndedIterator` can yield elements in two directions.
6150 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
6152 * std: `str::from_bytes` renamed to `str::from_utf8`.
6153 * std: `pop_opt` and `shift_opt` methods added to vectors.
6154 * std: The task-local data interface no longer uses @, and keys are
6155 no longer function pointers.
6156 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
6157 * std: Added `SharedPort` to `comm`.
6158 * std: `Eq` has a default method for `ne`; only `eq` is required
6160 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
6161 is required in implementations.
6162 * std: `is_utf8` performance is improved, impacting many string functions.
6163 * std: `os::MemoryMap` provides cross-platform mmap.
6164 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
6165 are not 'in-bounds' are considered undefined.
6166 * std: Many freestanding functions in `vec` removed in favor of methods.
6167 * std: Many freestanding functions on scalar types removed in favor of
6169 * std: Many options to task builders were removed since they don't make
6170 sense in the new scheduler design.
6171 * std: More containers implement `FromIterator` so can be created by the
6173 * std: More complete atomic types in `unstable::atomics`.
6174 * std: `comm::PortSet` removed.
6175 * std: Mutating methods in the `Set` and `Map` traits have been moved into
6176 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
6177 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
6178 default implementations.
6179 * std: Various `from_str` functions were removed in favor of a generic
6180 `from_str` which is available in the prelude.
6181 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
6182 * extra: `dlist`, the doubly-linked list was modernized.
6183 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
6184 * extra: Added `glob` module, replacing `std::os::glob`.
6185 * extra: `rope` was removed.
6186 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
6187 * extra: `net`, and `timer` were removed. The experimental replacements
6188 are `std::rt::io::net` and `std::rt::io::timer`.
6189 * extra: Iterators implemented for `SmallIntMap`.
6190 * extra: Iterators implemented for `Bitv` and `BitvSet`.
6191 * extra: `SmallIntSet` removed. Use `BitvSet`.
6192 * extra: Performance of JSON parsing greatly improved.
6193 * extra: `semver` updated to SemVer 2.0.0.
6194 * extra: `term` handles more terminals correctly.
6195 * extra: `dbg` module removed.
6196 * extra: `par` module removed.
6197 * extra: `future` was cleaned up, with some method renames.
6198 * extra: Most free functions in `getopts` were converted to methods.
6201 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
6202 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
6203 similarly to gcc's `--march` flag.
6204 * rustc's performance compiling small crates is much better.
6205 * rustpkg has received many improvements.
6206 * rustpkg supports git tags as package IDs.
6207 * rustpkg builds into target-specific directories so it can be used for
6209 * The number of concurrent test tasks is controlled by the environment
6210 variable RUST_TEST_TASKS.
6211 * The test harness can now report metrics for benchmarks.
6212 * All tools have man pages.
6213 * Programs compiled with `--test` now support the `-h` and `--help` flags.
6214 * The runtime uses jemalloc for allocations.
6215 * Segmented stacks are temporarily disabled as part of the transition to
6216 the new runtime. Stack overflows are possible!
6217 * A new documentation backend, rustdoc_ng, is available for use. It is
6218 still invoked through the normal `rustdoc` command.
6221 Version 0.7 (2013-07-03)
6222 =======================
6224 * ~2000 changes, numerous bugfixes
6227 * `impl`s no longer accept a visibility qualifier. Put them on methods
6229 * The borrow checker has been rewritten with flow-sensitivity, fixing
6230 many bugs and inconveniences.
6231 * The `self` parameter no longer implicitly means `&'self self`,
6232 and can be explicitly marked with a lifetime.
6233 * Overloadable compound operators (`+=`, etc.) have been temporarily
6234 removed due to bugs.
6235 * The `for` loop protocol now requires `for`-iterators to return `bool`
6236 so they compose better.
6237 * The `Durable` trait is replaced with the `'static` bounds.
6238 * Trait default methods work more often.
6239 * Structs with the `#[packed]` attribute have byte alignment and
6240 no padding between fields.
6241 * Type parameters bound by `Copy` must now be copied explicitly with
6243 * It is now illegal to move out of a dereferenced unsafe pointer.
6244 * `Option<~T>` is now represented as a nullable pointer.
6245 * `@mut` does dynamic borrow checks correctly.
6246 * The `main` function is only detected at the topmost level of the crate.
6247 The `#[main]` attribute is still valid anywhere.
6248 * Struct fields may no longer be mutable. Use inherited mutability.
6249 * The `#[no_send]` attribute makes a type that would otherwise be
6251 * The `#[no_freeze]` attribute makes a type that would otherwise be
6253 * Unbounded recursion will abort the process after reaching the limit
6254 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
6255 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
6256 are never implicitly copyable.
6257 * `#[static_assert]` makes compile-time assertions about static bools.
6258 * At long last, 'argument modes' no longer exist.
6259 * The rarely used `use mod` statement no longer exists.
6262 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
6264 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
6265 `Rand`, `Zero` and `ToStr` can all be automatically derived with
6267 * The `bytes!` macro returns a vector of bytes for string, u8, char,
6268 and unsuffixed integer literals.
6271 * The `core` crate was renamed to `std`.
6272 * The `std` crate was renamed to `extra`.
6273 * More and improved documentation.
6274 * std: `iterator` module for external iterator objects.
6275 * Many old-style (internal, higher-order function) iterators replaced by
6276 implementations of `Iterator`.
6277 * std: Many old internal vector and string iterators,
6278 incl. `any`, `all`. removed.
6279 * std: The `finalize` method of `Drop` renamed to `drop`.
6280 * std: The `drop` method now takes `&mut self` instead of `&self`.
6281 * std: The prelude no longer re-exports any modules, only types and traits.
6282 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
6283 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
6284 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
6285 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
6286 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
6287 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
6288 * std: Many types implement `Clone`.
6289 * std: `path` type renamed to `Path`.
6290 * std: `mut` module and `Mut` type removed.
6291 * std: Many standalone functions removed in favor of methods and iterators
6292 in `vec`, `str`. In the future methods will also work as functions.
6293 * std: `reinterpret_cast` removed. Use `transmute`.
6294 * std: ascii string handling in `std::ascii`.
6295 * std: `Rand` is implemented for ~/@.
6296 * std: `run` module for spawning processes overhauled.
6297 * std: Various atomic types added to `unstable::atomic`.
6298 * std: Various types implement `Zero`.
6299 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
6300 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
6301 * std: Added `os::mkdir_recursive`.
6302 * std: Added `os::glob` function performs filesystems globs.
6303 * std: `FuzzyEq` renamed to `ApproxEq`.
6304 * std: `Map` now defines `pop` and `swap` methods.
6305 * std: `Cell` constructors converted to static methods.
6306 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
6307 * extra: `flate` module moved from `std` to `extra`.
6308 * extra: `fileinput` module for iterating over a series of files.
6309 * extra: `Complex` number type and `complex` module.
6310 * extra: `Rational` number type and `rational` module.
6311 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
6312 * extra: `term` uses terminfo now, is more correct.
6313 * extra: `arc` functions converted to methods.
6314 * extra: Implementation of fixed output size variations of SHA-2.
6317 * `unused_variable` lint mode for unused variables (default: warn).
6318 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
6320 * `unused_mut` lint mode for identifying unused `mut` qualifiers
6322 * `dead_assignment` lint mode for unread variables (default: warn).
6323 * `unnecessary_allocation` lint mode detects some heap allocations that are
6324 immediately borrowed so could be written without allocating (default: warn).
6325 * `missing_doc` lint mode (default: allow).
6326 * `unreachable_code` lint mode (default: warn).
6327 * The `rusti` command has been rewritten and a number of bugs addressed.
6328 * rustc outputs in color on more terminals.
6329 * rustc accepts a `--link-args` flag to pass arguments to the linker.
6330 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
6331 * Compiling with `-g` will make the binary record information about
6332 dynamic borrowcheck failures for debugging.
6333 * rustdoc has a nicer stylesheet.
6334 * Various improvements to rustdoc.
6335 * Improvements to rustpkg (see the detailed release notes).
6338 Version 0.6 (2013-04-03)
6339 ========================
6341 * ~2100 changes, numerous bugfixes
6344 * The self type parameter in traits is now spelled `Self`
6345 * The `self` parameter in trait and impl methods must now be explicitly
6346 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
6347 * Static methods no longer require the `static` keyword and instead
6348 are distinguished by the lack of a `self` parameter
6349 * Replaced the `Durable` trait with the `'static` lifetime
6350 * The old closure type syntax with the trailing sigil has been
6351 removed in favor of the more consistent leading sigil
6352 * `super` is a keyword, and may be prefixed to paths
6353 * Trait bounds are separated with `+` instead of whitespace
6354 * Traits are implemented with `impl Trait for Type`
6355 instead of `impl Type: Trait`
6356 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
6357 * The `export` keyword has finally been removed
6358 * The `move` keyword has been removed (see "Semantic changes")
6359 * The interior mutability qualifier on vectors, `[mut T]`, has been
6360 removed. Use `&mut [T]`, etc.
6361 * `mut` is no longer valid in `~mut T`. Use inherited mutability
6362 * `fail` is no longer a keyword. Use `fail!()`
6363 * `assert` is no longer a keyword. Use `assert!()`
6364 * `log` is no longer a keyword. use `debug!`, etc.
6365 * 1-tuples may be represented as `(T,)`
6366 * Struct fields may no longer be `mut`. Use inherited mutability,
6367 `@mut T`, `core::mut` or `core::cell`
6368 * `extern mod { ... }` is no longer valid syntax for foreign
6369 function modules. Use extern blocks: `extern { ... }`
6370 * Newtype enums removed. Use tuple-structs.
6371 * Trait implementations no longer support visibility modifiers
6372 * Pattern matching over vectors improved and expanded
6373 * `const` renamed to `static` to correspond to lifetime name,
6374 and make room for future `static mut` unsafe mutable globals.
6375 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
6376 * `Clone` implementations can be automatically generated with
6377 `#[deriving(Clone)]`
6378 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
6379 instead of `foo as Bar`.
6380 * Fixed length vector types are now written as `[int, .. 3]`
6381 instead of `[int * 3]`.
6382 * Fixed length vector types can express the length as a constant
6383 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
6386 * Types with owned pointers or custom destructors move by default,
6387 eliminating the `move` keyword
6388 * All foreign functions are considered unsafe
6389 * &mut is now unaliasable
6390 * Writes to borrowed @mut pointers are prevented dynamically
6392 * The name of the main function can be customized using #[main]
6393 * The default type of an inferred closure is &fn instead of @fn
6394 * `use` statements may no longer be "chained" - they cannot import
6395 identifiers imported by previous `use` statements
6396 * `use` statements are crate relative, importing from the "top"
6397 of the crate by default. Paths may be prefixed with `super::`
6398 or `self::` to change the search behavior.
6399 * Method visibility is inherited from the implementation declaration
6400 * Structural records have been removed
6401 * Many more types can be used in static items, including enums
6402 'static-lifetime pointers and vectors
6403 * Pattern matching over vectors improved and expanded
6404 * Typechecking of closure types has been overhauled to
6405 improve inference and eliminate unsoundness
6406 * Macros leave scope at the end of modules, unless that module is
6407 tagged with #[macro_escape]
6410 * Added big integers to `std::bigint`
6411 * Removed `core::oldcomm` module
6412 * Added pipe-based `core::comm` module
6413 * Numeric traits have been reorganized under `core::num`
6414 * `vec::slice` finally returns a slice
6415 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
6416 * Containers reorganized around traits in `core::container`
6417 * `core::dvec` removed, `~[T]` is a drop-in replacement
6418 * `core::send_map` renamed to `core::hashmap`
6419 * `std::map` removed; replaced with `core::hashmap`
6420 * `std::treemap` reimplemented as an owned balanced tree
6421 * `std::deque` and `std::smallintmap` reimplemented as owned containers
6422 * `core::trie` added as a fast ordered map for integer keys
6423 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
6424 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
6425 overload the comparison operators, whereas `TotalOrd` is used
6426 by certain container types
6429 * Replaced the 'cargo' package manager with 'rustpkg'
6430 * Added all-purpose 'rust' tool
6431 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
6432 * rustc now *attempts* to offer spelling suggestions
6433 * Improved support for ARM and Android
6434 * Preliminary MIPS backend
6435 * Improved foreign function ABI implementation for x86, x86_64
6436 * Various memory usage improvements
6437 * Rust code may be embedded in foreign code under limited circumstances
6438 * Inline assembler supported by new asm!() syntax extension.
6441 Version 0.5 (2012-12-21)
6442 ===========================
6444 * ~900 changes, numerous bugfixes
6447 * Removed `<-` move operator
6448 * Completed the transition from the `#fmt` extension syntax to `fmt!`
6449 * Removed old fixed length vector syntax - `[T]/N`
6450 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
6451 * Macros may now expand to items and statements
6452 * `a.b()` is always parsed as a method call, never as a field projection
6453 * `Eq` and `IterBytes` implementations can be automatically generated
6454 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
6455 * Removed the special crate language for `.rc` files
6456 * Function arguments may consist of any irrefutable pattern
6459 * `&` and `~` pointers may point to objects
6460 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
6461 * Enum variants may be structs
6462 * Destructors can be added to all nominal types with the Drop trait
6463 * Structs and nullary enum variants may be constants
6464 * Values that cannot be implicitly copied are now automatically moved
6465 without writing `move` explicitly
6466 * `&T` may now be coerced to `*T`
6467 * Coercions happen in `let` statements as well as function calls
6468 * `use` statements now take crate-relative paths
6469 * The module and type namespaces have been merged so that static
6470 method names can be resolved under the trait in which they are
6473 * Improved support for language features
6474 * Trait inheritance works in many scenarios
6475 * More support for explicit self arguments in methods - `self`, `&self`
6476 `@self`, and `~self` all generally work as expected
6477 * Static methods work in more situations
6478 * Experimental: Traits may declare default methods for the implementations
6482 * New condition handling system in `core::condition`
6483 * Timsort added to `std::sort`
6484 * New priority queue, `std::priority_queue`
6485 * Pipes for serializable types, `std::flatpipes'
6486 * Serialization overhauled to be trait-based
6487 * Expanded `getopts` definitions
6488 * Moved futures to `std`
6489 * More functions are pure now
6490 * `core::comm` renamed to `oldcomm`. Still deprecated
6491 * `rustdoc` and `cargo` are libraries now
6494 * Added a preliminary REPL, `rusti`
6495 * License changed from MIT to dual MIT/APL2
6498 Version 0.4 (2012-10-15)
6499 ==========================
6501 * ~2000 changes, numerous bugfixes
6504 * All keywords are now strict and may not be used as identifiers anywhere
6505 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
6506 'of', 'with', 'to', 'class'.
6507 * Classes are replaced with simpler structs
6508 * Explicit method self types
6509 * `ret` became `return` and `alt` became `match`
6510 * `import` is now `use`; `use is now `extern mod`
6511 * `extern mod { ... }` is now `extern { ... }`
6512 * `use mod` is the recommended way to import modules
6513 * `pub` and `priv` replace deprecated export lists
6514 * The syntax of `match` pattern arms now uses fat arrow (=>)
6515 * `main` no longer accepts an args vector; use `os::args` instead
6518 * Trait implementations are now coherent, ala Haskell typeclasses
6519 * Trait methods may be static
6520 * Argument modes are deprecated
6521 * Borrowed pointers are much more mature and recommended for use
6522 * Strings and vectors in the static region are stored in constant memory
6523 * Typestate was removed
6524 * Resolution rewritten to be more reliable
6525 * Support for 'dual-mode' data structures (freezing and thawing)
6528 * Most binary operators can now be overloaded via the traits in
6530 * `std::net::url` for representing URLs
6531 * Sendable hash maps in `core::send_map`
6532 * `core::task' gained a (currently unsafe) task-local storage API
6535 * An efficient new intertask communication primitive called the pipe,
6536 along with a number of higher-level channel types, in `core::pipes`
6537 * `std::arc`, an atomically reference counted, immutable, shared memory
6539 * `std::sync`, various exotic synchronization tools based on arcs and pipes
6540 * Futures are now based on pipes and sendable
6541 * More robust linked task failure
6542 * Improved task builder API
6545 * Improved error reporting
6546 * Preliminary JIT support
6547 * Preliminary work on precise GC
6548 * Extensive architectural improvements to rustc
6549 * Begun a transition away from buggy C++-based reflection (shape) code to
6550 Rust-based (visitor) code
6551 * All hash functions and tables converted to secure, randomized SipHash
6554 Version 0.3 (2012-07-12)
6555 ========================
6557 * ~1900 changes, numerous bugfixes
6559 * New coding conveniences
6560 * Integer-literal suffix inference
6561 * Per-item control over warnings, errors
6562 * #[cfg(windows)] and #[cfg(unix)] attributes
6563 * Documentation comments
6564 * More compact closure syntax
6565 * 'do' expressions for treating higher-order functions as
6567 * *-patterns (wildcard extended to all constructor fields)
6570 * Name resolution pass and exhaustiveness checker rewritten
6571 * Region pointers and borrow checking supersede alias
6573 * Init-ness checking is now provided by a region-based liveness
6574 pass instead of the typestate pass; same for last-use analysis
6575 * Extensive work on region pointers
6577 * Experimental new language features
6578 * Slices and fixed-size, interior-allocated vectors
6579 * #!-comments for lang versioning, shell execution
6580 * Destructors and iface implementation for classes;
6581 type-parameterized classes and class methods
6582 * 'const' type kind for types that can be used to implement
6583 shared-memory concurrency patterns
6587 * Removal of various obsolete features
6588 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
6589 'crust', 'native' (now 'extern'), 'cont' (now 'again')
6591 * Constructs: do-while loops ('do' repurposed), fn binding,
6592 resources (replaced by destructors)
6594 * Compiler reorganization
6595 * Syntax-layer of compiler split into separate crate
6596 * Clang (from LLVM project) integrated into build
6597 * Typechecker split into sub-modules
6600 * New time functions
6601 * Extension methods for many built-in types
6602 * Arc: atomic-refcount read-only / exclusive-use shared cells
6603 * Par: parallel map and search routines
6604 * Extensive work on libuv interface
6605 * Much vector code moved to libraries
6606 * Syntax extensions: #line, #col, #file, #mod, #stringify,
6607 #include, #include_str, #include_bin
6610 * Cargo automatically resolves dependencies
6613 Version 0.2 (2012-03-29)
6614 =========================
6616 * >1500 changes, numerous bugfixes
6618 * New docs and doc tooling
6620 * New port: FreeBSD x86_64
6622 * Compilation model enhancements
6623 * Generics now specialized, multiply instantiated
6624 * Functions now inlined across separate crates
6626 * Scheduling, stack and threading fixes
6627 * Noticeably improved message-passing performance
6628 * Explicit schedulers
6632 * Experimental new language features
6633 * Operator overloading
6637 * Various language extensions
6638 * C-callback function types: 'crust fn ...'
6639 * Infinite-loop construct: 'loop { ... }'
6640 * Shorten 'mutable' to 'mut'
6641 * Required mutable-local qualifier: 'let mut ...'
6642 * Basic glob-exporting: 'export foo::*;'
6643 * Alt now exhaustive, 'alt check' for runtime-checked
6644 * Block-function form of 'for' loop, with 'break' and 'ret'.
6647 * AST quasi-quote syntax extension
6648 * Revived libuv interface
6649 * New modules: core::{future, iter}, std::arena
6650 * Merged per-platform std::{os*, fs*} to core::{libc, os}
6651 * Extensive cleanup, regularization in libstd, libcore
6654 Version 0.1 (2012-01-20)
6655 ===============================
6657 * Most language features work, including:
6658 * Unique pointers, unique closures, move semantics
6659 * Interface-constrained generics
6660 * Static interface dispatch
6662 * Multithread task scheduling
6663 * Typestate predicates
6664 * Failure unwinding, destructors
6665 * Pattern matching and destructuring assignment
6666 * Lightweight block-lambda syntax
6667 * Preliminary macro-by-example
6669 * Compiler works with the following configurations:
6670 * Linux: x86 and x86_64 hosts and targets
6671 * macOS: x86 and x86_64 hosts and targets
6672 * Windows: x86 hosts and targets
6674 * Cross compilation / multi-target configuration supported.
6676 * Preliminary API-documentation and package-management tools included.
6680 * Documentation is incomplete.
6682 * Performance is below intended target.
6684 * Standard library APIs are subject to extensive change, reorganization.
6686 * Language-level versioning is not yet operational - future code will