1 Version 1.29.0 (2018-09-13)
2 ==========================
6 - [Bumped minimum LLVM version to 5.0.][51899]
7 - [Added `powerpc64le-unknown-linux-musl` target.][51619]
8 - [Added `aarch64-unknown-hermit` and `x86_64-unknown-hermit` targets.][52861]
12 - [`Once::call_once` now no longer requires `Once` to be `'static`.][52239]
13 - [`BuildHasherDefault` now implements `PartialEq` and `Eq`.][52402]
14 - [`Box<CStr>`, `Box<OsStr>`, and `Box<Path>` now implement `Clone`.][51912]
15 - [Implemented `PartialEq<&str>` for `OsString` and `PartialEq<OsString>`
17 - [`Cell<T>` now allows `T` to be unsized.][50494]
18 - [`SocketAddr` is now stable on Redox.][52656]
23 - [`Iterator::flatten`]
28 - [Cargo can silently fix some bad lockfiles ][cargo/5831] You can use
29 `--locked` to disable this behaviour.
30 - [`cargo-install` will now allow you to cross compile an install
31 using `--target`][cargo/5614]
32 - [Added the `cargo-fix` subcommand to automatically move project code from
33 2015 edition to 2018.][cargo/5723]
34 - [`cargo doc` can now optionally document private types using the
35 `--document-private-items` flag.][cargo/5543]
39 - [`rustdoc` now has the `--cap-lints` option which demotes all lints above
40 the specified level to that level.][52354] For example `--cap-lints warn`
41 will demote `deny` and `forbid` lints to `warn`.
42 - [`rustc` and `rustdoc` will now have the exit code of `1` if compilation
43 fails, and `101` if there is a panic.][52197]
44 - [A preview of clippy has been made available through rustup.][51122]
45 You can install the preview with `rustup component add clippy-preview`
49 - [`str::{slice_unchecked, slice_unchecked_mut}` are now deprecated.][51807]
50 Use `str::get_unchecked(begin..end)` instead.
51 - [`std::env::home_dir` is now deprecated for its unintuitive behaviour.][51656]
52 Consider using the `home_dir` function from
53 https://crates.io/crates/dirs instead.
54 - [`rustc` will no longer silently ignore invalid data in target spec.][52330]
56 [52861]: https://github.com/rust-lang/rust/pull/52861/
57 [52656]: https://github.com/rust-lang/rust/pull/52656/
58 [52239]: https://github.com/rust-lang/rust/pull/52239/
59 [52330]: https://github.com/rust-lang/rust/pull/52330/
60 [52354]: https://github.com/rust-lang/rust/pull/52354/
61 [52402]: https://github.com/rust-lang/rust/pull/52402/
62 [52103]: https://github.com/rust-lang/rust/pull/52103/
63 [52197]: https://github.com/rust-lang/rust/pull/52197/
64 [51807]: https://github.com/rust-lang/rust/pull/51807/
65 [51899]: https://github.com/rust-lang/rust/pull/51899/
66 [51912]: https://github.com/rust-lang/rust/pull/51912/
67 [51511]: https://github.com/rust-lang/rust/pull/51511/
68 [51619]: https://github.com/rust-lang/rust/pull/51619/
69 [51656]: https://github.com/rust-lang/rust/pull/51656/
70 [51178]: https://github.com/rust-lang/rust/pull/51178/
71 [51122]: https://github.com/rust-lang/rust/pull/51122
72 [50494]: https://github.com/rust-lang/rust/pull/50494/
73 [cargo/5543]: https://github.com/rust-lang/cargo/pull/5543
74 [cargo/5614]: https://github.com/rust-lang/cargo/pull/5614/
75 [cargo/5723]: https://github.com/rust-lang/cargo/pull/5723/
76 [cargo/5831]: https://github.com/rust-lang/cargo/pull/5831/
77 [`Arc::downcast`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.downcast
78 [`Iterator::flatten`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.flatten
79 [`Rc::downcast`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.downcast
82 Version 1.28.0 (2018-08-02)
83 ===========================
87 - [The `#[repr(transparent)]` attribute is now stable.][51562] This attribute
88 allows a Rust newtype wrapper (`struct NewType<T>(T);`) to be represented as
89 the inner type across Foreign Function Interface (FFI) boundaries.
90 - [The keywords `pure`, `sizeof`, `alignof`, and `offsetof` have been unreserved
91 and can now be used as identifiers.][51196]
92 - [The `GlobalAlloc` trait and `#[global_allocator]` attribute are now
93 stable.][51241] This will allow users to specify a global allocator for
95 - [Unit test functions marked with the `#[test]` attribute can now return
96 `Result<(), E: Debug>` in addition to `()`.][51298]
97 - [The `lifetime` specifier for `macro_rules!` is now stable.][50385] This
98 allows macros to easily target lifetimes.
102 - [The `s` and `z` optimisation levels are now stable.][50265] These optimisations
103 prioritise making smaller binary sizes. `z` is the same as `s` with the
104 exception that it does not vectorise loops, which typically results in an even
106 - [The short error format is now stable.][49546] Specified with
107 `--error-format=short` this option will provide a more compressed output of
109 - [Added a lint warning when you have duplicated `macro_export`s.][50143]
110 - [Reduced the number of allocations in the macro parser.][50855] This can
111 improve compile times of macro heavy crates on average by 5%.
115 - [Implemented `Default` for `&mut str`.][51306]
116 - [Implemented `From<bool>` for all integer and unsigned number types.][50554]
117 - [Implemented `Extend` for `()`.][50234]
118 - [The `Debug` implementation of `time::Duration` should now be more easily
119 human readable.][50364] Previously a `Duration` of one second would printed as
120 `Duration { secs: 1, nanos: 0 }` and will now be printed as `1s`.
121 - [Implemented `From<&String>` for `Cow<str>`, `From<&Vec<T>>` for `Cow<[T]>`,
122 `From<Cow<CStr>>` for `CString`, `From<CString>, From<CStr>, From<&CString>`
123 for `Cow<CStr>`, `From<OsString>, From<OsStr>, From<&OsString>` for
124 `Cow<OsStr>`, `From<&PathBuf>` for `Cow<Path>`, and `From<Cow<Path>>`
125 for `PathBuf`.][50170]
126 - [Implemented `Shl` and `Shr` for `Wrapping<u128>`
127 and `Wrapping<i128>`.][50465]
128 - [`DirEntry::metadata` now uses `fstatat` instead of `lstat` when
129 possible.][51050] This can provide up to a 40% speed increase.
130 - [Improved error messages when using `format!`.][50610]
134 - [`Iterator::step_by`]
135 - [`Path::ancestors`]
136 - [`SystemTime::UNIX_EPOCH`]
137 - [`alloc::GlobalAlloc`]
139 - [`alloc::LayoutErr`]
142 - [`alloc::alloc_zeroed`]
145 - [`alloc::handle_alloc_error`]
146 - [`btree_map::Entry::or_default`]
148 - [`hash_map::Entry::or_default`]
149 - [`iter::repeat_with`]
150 - [`num::NonZeroUsize`]
151 - [`num::NonZeroU128`]
152 - [`num::NonZeroU16`]
153 - [`num::NonZeroU32`]
154 - [`num::NonZeroU64`]
156 - [`ops::RangeBounds`]
157 - [`slice::SliceIndex`]
158 - [`slice::from_mut`]
159 - [`slice::from_ref`]
160 - [`{Any + Send + Sync}::downcast_mut`]
161 - [`{Any + Send + Sync}::downcast_ref`]
162 - [`{Any + Send + Sync}::is`]
166 - [Cargo will now no longer allow you to publish crates with build scripts that
167 modify the `src` directory.][cargo/5584] The `src` directory in a crate should be
168 considered to be immutable.
172 - [The `suggestion_applicability` field in `rustc`'s json output is now
173 stable.][50486] This will allow dev tools to check whether a code suggestion
178 - [Rust will consider trait objects with duplicated constraints to be the same
179 type as without the duplicated constraint.][51276] For example the below code will
185 fn test(&self) { println!("one"); } //~ ERROR duplicate definitions with name `test`
188 impl Trait + Send + Send {
189 fn test(&self) { println!("two"); }
193 [49546]: https://github.com/rust-lang/rust/pull/49546/
194 [50143]: https://github.com/rust-lang/rust/pull/50143/
195 [50170]: https://github.com/rust-lang/rust/pull/50170/
196 [50234]: https://github.com/rust-lang/rust/pull/50234/
197 [50265]: https://github.com/rust-lang/rust/pull/50265/
198 [50364]: https://github.com/rust-lang/rust/pull/50364/
199 [50385]: https://github.com/rust-lang/rust/pull/50385/
200 [50465]: https://github.com/rust-lang/rust/pull/50465/
201 [50486]: https://github.com/rust-lang/rust/pull/50486/
202 [50554]: https://github.com/rust-lang/rust/pull/50554/
203 [50610]: https://github.com/rust-lang/rust/pull/50610/
204 [50855]: https://github.com/rust-lang/rust/pull/50855/
205 [51050]: https://github.com/rust-lang/rust/pull/51050/
206 [51196]: https://github.com/rust-lang/rust/pull/51196/
207 [51200]: https://github.com/rust-lang/rust/pull/51200/
208 [51241]: https://github.com/rust-lang/rust/pull/51241/
209 [51276]: https://github.com/rust-lang/rust/pull/51276/
210 [51298]: https://github.com/rust-lang/rust/pull/51298/
211 [51306]: https://github.com/rust-lang/rust/pull/51306/
212 [51562]: https://github.com/rust-lang/rust/pull/51562/
213 [cargo/5584]: https://github.com/rust-lang/cargo/pull/5584/
214 [`Iterator::step_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.step_by
215 [`Path::ancestors`]: https://doc.rust-lang.org/std/path/struct.Path.html#method.ancestors
216 [`SystemTime::UNIX_EPOCH`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#associatedconstant.UNIX_EPOCH
217 [`alloc::GlobalAlloc`]: https://doc.rust-lang.org/std/alloc/trait.GlobalAlloc.html
218 [`alloc::Layout`]: https://doc.rust-lang.org/std/alloc/struct.Layout.html
219 [`alloc::LayoutErr`]: https://doc.rust-lang.org/std/alloc/struct.LayoutErr.html
220 [`alloc::System`]: https://doc.rust-lang.org/std/alloc/struct.System.html
221 [`alloc::alloc`]: https://doc.rust-lang.org/std/alloc/fn.alloc.html
222 [`alloc::alloc_zeroed`]: https://doc.rust-lang.org/std/alloc/fn.alloc_zeroed.html
223 [`alloc::dealloc`]: https://doc.rust-lang.org/std/alloc/fn.dealloc.html
224 [`alloc::realloc`]: https://doc.rust-lang.org/std/alloc/fn.realloc.html
225 [`alloc::handle_alloc_error`]: https://doc.rust-lang.org/std/alloc/fn.handle_alloc_error.html
226 [`btree_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.or_default
227 [`fmt::Alignment`]: https://doc.rust-lang.org/std/fmt/enum.Alignment.html
228 [`hash_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.or_default
229 [`iter::repeat_with`]: https://doc.rust-lang.org/std/iter/fn.repeat_with.html
230 [`num::NonZeroUsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroUsize.html
231 [`num::NonZeroU128`]: https://doc.rust-lang.org/std/num/struct.NonZeroU128.html
232 [`num::NonZeroU16`]: https://doc.rust-lang.org/std/num/struct.NonZeroU16.html
233 [`num::NonZeroU32`]: https://doc.rust-lang.org/std/num/struct.NonZeroU32.html
234 [`num::NonZeroU64`]: https://doc.rust-lang.org/std/num/struct.NonZeroU64.html
235 [`num::NonZeroU8`]: https://doc.rust-lang.org/std/num/struct.NonZeroU8.html
236 [`ops::RangeBounds`]: https://doc.rust-lang.org/std/ops/trait.RangeBounds.html
237 [`slice::SliceIndex`]: https://doc.rust-lang.org/std/slice/trait.SliceIndex.html
238 [`slice::from_mut`]: https://doc.rust-lang.org/std/slice/fn.from_mut.html
239 [`slice::from_ref`]: https://doc.rust-lang.org/std/slice/fn.from_ref.html
240 [`{Any + Send + Sync}::downcast_mut`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_mut-2
241 [`{Any + Send + Sync}::downcast_ref`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_ref-2
242 [`{Any + Send + Sync}::is`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.is-2
244 Version 1.27.2 (2018-07-20)
245 ===========================
250 - The borrow checker was fixed to avoid potential unsoundness when using
251 match ergonomics: [#52213][52213].
253 [52213]: https://github.com/rust-lang/rust/issues/52213
255 Version 1.27.1 (2018-07-10)
256 ===========================
261 - rustdoc would execute plugins in the /tmp/rustdoc/plugins directory
262 when running, which enabled executing code as some other user on a
263 given machine. This release fixes that vulnerability; you can read
264 more about this on the [blog][rustdoc-sec]. The associated CVE is [CVE-2018-1000622].
266 Thank you to Red Hat for responsibily disclosing this vulnerability to us.
271 - The borrow checker was fixed to avoid an additional potential unsoundness when using
272 match ergonomics: [#51415][51415], [#49534][49534].
274 [51415]: https://github.com/rust-lang/rust/issues/51415
275 [49534]: https://github.com/rust-lang/rust/issues/49534
276 [rustdoc-sec]: https://blog.rust-lang.org/2018/07/06/security-advisory-for-rustdoc.html
277 [CVE-2018-1000622]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=%20CVE-2018-1000622
279 Version 1.27.0 (2018-06-21)
280 ==========================
284 - [Removed 'proc' from the reserved keywords list.][49699] This allows `proc` to
285 be used as an identifier.
286 - [The dyn syntax is now available.][49968] This syntax is equivalent to the
287 bare `Trait` syntax, and should make it clearer when being used in tandem with
288 `impl Trait`. Since it is equivalent to the following syntax:
289 `&Trait == &dyn Trait`, `&mut Trait == &mut dyn Trait`, and
290 `Box<Trait> == Box<dyn Trait>`.
291 - [Attributes on generic parameters such as types and lifetimes are
292 now stable.][48851] e.g.
293 `fn foo<#[lifetime_attr] 'a, #[type_attr] T: 'a>() {}`
294 - [The `#[must_use]` attribute can now also be used on functions as well as
295 types.][48925] It provides a lint that by default warns users when the
296 value returned by a function has not been used.
300 - [Added the `armv5te-unknown-linux-musleabi` target.][50423]
304 - [SIMD (Single Instruction Multiple Data) on x86/x86_64 is now stable.][49664]
305 This includes [`arch::x86`] & [`arch::x86_64`] modules which contain
306 SIMD intrinsics, a new macro called `is_x86_feature_detected!`, the
307 `#[target_feature(enable="")]` attribute, and adding `target_feature = ""` to
309 - [A lot of methods for `[u8]`, `f32`, and `f64` previously only available in
310 std are now available in core.][49896]
311 - [The generic `Rhs` type parameter on `ops::{Shl, ShlAssign, Shr}` now defaults
313 - [`std::str::replace` now has the `#[must_use]` attribute][50177] to clarify
314 that the operation isn't done in place.
315 - [`Clone::clone`, `Iterator::collect`, and `ToOwned::to_owned` now have
316 the `#[must_use]` attribute][49533] to warn about unused potentially
317 expensive allocations.
321 - [`DoubleEndedIterator::rfind`]
322 - [`DoubleEndedIterator::rfold`]
323 - [`DoubleEndedIterator::try_rfold`]
324 - [`Duration::from_micros`]
325 - [`Duration::from_nanos`]
326 - [`Duration::subsec_micros`]
327 - [`Duration::subsec_millis`]
328 - [`HashMap::remove_entry`]
329 - [`Iterator::try_fold`]
330 - [`Iterator::try_for_each`]
333 - [`String::replace_range`]
334 - [`Take::set_limit`]
335 - [`hint::unreachable_unchecked`]
336 - [`os::unix::process::parent_id`]
337 - [`ptr::swap_nonoverlapping`]
338 - [`slice::rsplit_mut`]
340 - [`slice::swap_with_slice`]
344 - [`cargo-metadata` now includes `authors`, `categories`, `keywords`,
345 `readme`, and `repository` fields.][cargo/5386]
346 - [`cargo-metadata` now includes a package's `metadata` table.][cargo/5360]
347 - [Added the `--target-dir` optional argument.][cargo/5393] This allows you to specify
348 a different directory than `target` for placing compilation artifacts.
349 - [Cargo will be adding automatic target inference for binaries, benchmarks,
350 examples, and tests in the Rust 2018 edition.][cargo/5335] If your project specifies
351 specific targets e.g. using `[[bin]]` and have other binaries in locations
352 where cargo would infer a binary, Cargo will produce a warning. You can
353 disable this feature ahead of time by setting any of the following `autobins`,
354 `autobenches`, `autoexamples`, `autotests` to false.
355 - [Cargo will now cache compiler information.][cargo/5359] This can be disabled by
356 setting `CARGO_CACHE_RUSTC_INFO=0` in your environment.
360 - [Added “The Rustc book” into the official documentation.][49707]
361 [“The Rustc book”] documents and teaches how to use the rustc compiler.
362 - [All books available on `doc.rust-lang.org` are now searchable.][49623]
366 - [Calling a `CharExt` or `StrExt` method directly on core will no longer
367 work.][49896] e.g. `::core::prelude::v1::StrExt::is_empty("")` will not
368 compile, `"".is_empty()` will still compile.
369 - [`Debug` output on `atomic::{AtomicBool, AtomicIsize, AtomicPtr, AtomicUsize}`
370 will only print the inner type.][48553] e.g.
371 `print!("{:?}", AtomicBool::new(true))` will print `true`
372 not `AtomicBool(true)`.
373 - [The maximum number for `repr(align(N))` is now 2²⁹.][50378] Previously you
374 could enter higher numbers but they were not supported by LLVM. Up to 512MB
375 alignment should cover all use cases.
376 - The `.description()` method on the `std::error::Error` trait
377 [has been soft-deprecated][50163]. It is no longer required to implement it.
379 [48553]: https://github.com/rust-lang/rust/pull/48553/
380 [48851]: https://github.com/rust-lang/rust/pull/48851/
381 [48925]: https://github.com/rust-lang/rust/pull/48925/
382 [49533]: https://github.com/rust-lang/rust/pull/49533/
383 [49623]: https://github.com/rust-lang/rust/pull/49623/
384 [49630]: https://github.com/rust-lang/rust/pull/49630/
385 [49664]: https://github.com/rust-lang/rust/pull/49664/
386 [49699]: https://github.com/rust-lang/rust/pull/49699/
387 [49707]: https://github.com/rust-lang/rust/pull/49707/
388 [49719]: https://github.com/rust-lang/rust/pull/49719/
389 [49896]: https://github.com/rust-lang/rust/pull/49896/
390 [49968]: https://github.com/rust-lang/rust/pull/49968/
391 [50163]: https://github.com/rust-lang/rust/pull/50163
392 [50177]: https://github.com/rust-lang/rust/pull/50177/
393 [50378]: https://github.com/rust-lang/rust/pull/50378/
394 [50398]: https://github.com/rust-lang/rust/pull/50398/
395 [50423]: https://github.com/rust-lang/rust/pull/50423/
396 [cargo/5203]: https://github.com/rust-lang/cargo/pull/5203/
397 [cargo/5335]: https://github.com/rust-lang/cargo/pull/5335/
398 [cargo/5359]: https://github.com/rust-lang/cargo/pull/5359/
399 [cargo/5360]: https://github.com/rust-lang/cargo/pull/5360/
400 [cargo/5386]: https://github.com/rust-lang/cargo/pull/5386/
401 [cargo/5393]: https://github.com/rust-lang/cargo/pull/5393/
402 [`DoubleEndedIterator::rfind`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfind
403 [`DoubleEndedIterator::rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfold
404 [`DoubleEndedIterator::try_rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.try_rfold
405 [`Duration::from_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_micros
406 [`Duration::from_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_nanos
407 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
408 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
409 [`HashMap::remove_entry`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.remove_entry
410 [`Iterator::try_fold`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_fold
411 [`Iterator::try_for_each`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_for_each
412 [`NonNull::cast`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.cast
413 [`Option::filter`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.filter
414 [`String::replace_range`]: https://doc.rust-lang.org/std/string/struct.String.html#method.replace_range
415 [`Take::set_limit`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.set_limit
416 [`hint::unreachable_unchecked`]: https://doc.rust-lang.org/std/hint/fn.unreachable_unchecked.html
417 [`os::unix::process::parent_id`]: https://doc.rust-lang.org/std/os/unix/process/fn.parent_id.html
418 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
419 [`ptr::swap_nonoverlapping`]: https://doc.rust-lang.org/std/ptr/fn.swap_nonoverlapping.html
420 [`slice::rsplit_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit_mut
421 [`slice::rsplit`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit
422 [`slice::swap_with_slice`]: https://doc.rust-lang.org/std/primitive.slice.html#method.swap_with_slice
423 [`arch::x86_64`]: https://doc.rust-lang.org/std/arch/x86_64/index.html
424 [`arch::x86`]: https://doc.rust-lang.org/std/arch/x86/index.html
425 [“The Rustc book”]: https://doc.rust-lang.org/rustc
428 Version 1.26.2 (2018-06-05)
429 ==========================
434 - [The borrow checker was fixed to avoid unsoundness when using match ergonomics][51117]
436 [51117]: https://github.com/rust-lang/rust/issues/51117
439 Version 1.26.1 (2018-05-29)
440 ==========================
445 - [RLS now works on Windows][50646]
446 - [Rustfmt stopped badly formatting text in some cases][rustfmt/2695]
452 - [`fn main() -> impl Trait` no longer works for non-Termination
454 This reverts an accidental stabilization.
455 - [`NaN > NaN` no longer returns true in const-fn contexts][50812]
456 - [Prohibit using turbofish for `impl Trait` in method arguments][50950]
458 [50646]: https://github.com/rust-lang/rust/issues/50646
459 [50656]: https://github.com/rust-lang/rust/pull/50656
460 [50812]: https://github.com/rust-lang/rust/pull/50812
461 [50950]: https://github.com/rust-lang/rust/issues/50950
462 [rustfmt/2695]: https://github.com/rust-lang-nursery/rustfmt/issues/2695
464 Version 1.26.0 (2018-05-10)
465 ==========================
469 - [Closures now implement `Copy` and/or `Clone` if all captured variables
470 implement either or both traits.][49299]
471 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
472 - [The `'_` lifetime is now stable. The underscore lifetime can be used anywhere where a
473 lifetime can be elided.][49458]
474 - [`impl Trait` is now stable allowing you to have abstract types in returns
475 or in function parameters.][49255] e.g. `fn foo() -> impl Iterator<Item=u8>` or
476 `fn open(path: impl AsRef<Path>)`.
477 - [Pattern matching will now automatically apply dereferences.][49394]
478 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
479 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
480 - [A lot of operations are now available in a const context.][46882] E.g. You
481 can now index into constant arrays, reference and dereference into constants,
482 and use Tuple struct constructors.
483 - [Fixed entry slice patterns are now stable.][48516] e.g.
485 let points = [1, 2, 3, 4];
487 [1, 2, 3, 4] => println!("All points were sequential."),
488 _ => println!("Not all points were sequential."),
495 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
496 - [Fixed exponential projection complexity on nested types.][48296]
497 This can provide up to a ~12% reduction in compile times for certain crates.
498 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
499 to remap path prefixes outputted by the compiler.
500 - [Added `powerpc-unknown-netbsd` target.][48281]
504 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
505 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
506 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
507 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
508 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
509 - [`ascii::escape_default` is now available in libcore.][48735]
510 - [Trailing commas are now supported in std and core macros.][48056]
511 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
512 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
517 - [`*const T::copy_to_nonoverlapping`]
518 - [`*const T::copy_to`]
519 - [`*const T::read_unaligned`]
520 - [`*const T::read_volatile`]
523 - [`*const T::wrapping_add`]
524 - [`*const T::wrapping_sub`]
526 - [`*mut T::copy_to_nonoverlapping`]
527 - [`*mut T::copy_to`]
528 - [`*mut T::read_unaligned`]
529 - [`*mut T::read_volatile`]
531 - [`*mut T::replace`]
534 - [`*mut T::wrapping_add`]
535 - [`*mut T::wrapping_sub`]
536 - [`*mut T::write_bytes`]
537 - [`*mut T::write_unaligned`]
538 - [`*mut T::write_volatile`]
541 - [`FromUtf8Error::as_bytes`]
542 - [`LocalKey::try_with`]
544 - [`btree_map::Entry::and_modify`]
545 - [`fs::read_to_string`]
548 - [`hash_map::Entry::and_modify`]
549 - [`iter::FusedIterator`]
550 - [`ops::RangeInclusive`]
551 - [`ops::RangeToInclusive`]
553 - [`slice::rotate_left`]
554 - [`slice::rotate_right`]
560 - [Cargo will now output path to custom commands when `-v` is
561 passed with `--list`][cargo/5041]
562 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
566 - [The second edition of "The Rust Programming Language" book is now recommended
567 over the first.][48404]
572 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
573 syntax is now invalid.
575 use std::ops::Fn as dyn;
576 fn g(_: Box<dyn(std::fmt::Debug)>) {}
578 - [The result of dereferences are no longer promoted to `'static`.][47408]
582 const PAIR: &(i32, i32) = &(0, 1);
583 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
586 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
587 - [`".e0"` will now no longer parse as `0.0` and will instead cause
589 - [Removed hoedown from rustdoc.][48274]
590 - [Bounds on higher-kinded lifetimes a hard error.][48326]
592 [46882]: https://github.com/rust-lang/rust/pull/46882
593 [47379]: https://github.com/rust-lang/rust/pull/47379
594 [47408]: https://github.com/rust-lang/rust/pull/47408
595 [47813]: https://github.com/rust-lang/rust/pull/47813
596 [48056]: https://github.com/rust-lang/rust/pull/48056
597 [48125]: https://github.com/rust-lang/rust/pull/48125
598 [48166]: https://github.com/rust-lang/rust/pull/48166
599 [48235]: https://github.com/rust-lang/rust/pull/48235
600 [48274]: https://github.com/rust-lang/rust/pull/48274
601 [48281]: https://github.com/rust-lang/rust/pull/48281
602 [48296]: https://github.com/rust-lang/rust/pull/48296
603 [48326]: https://github.com/rust-lang/rust/pull/48326
604 [48359]: https://github.com/rust-lang/rust/pull/48359
605 [48404]: https://github.com/rust-lang/rust/pull/48404
606 [48481]: https://github.com/rust-lang/rust/pull/48481
607 [48516]: https://github.com/rust-lang/rust/pull/48516
608 [48628]: https://github.com/rust-lang/rust/pull/48628
609 [48629]: https://github.com/rust-lang/rust/pull/48629
610 [48657]: https://github.com/rust-lang/rust/pull/48657
611 [48735]: https://github.com/rust-lang/rust/pull/48735
612 [48978]: https://github.com/rust-lang/rust/pull/48978
613 [49101]: https://github.com/rust-lang/rust/pull/49101
614 [49109]: https://github.com/rust-lang/rust/pull/49109
615 [49121]: https://github.com/rust-lang/rust/pull/49121
616 [49162]: https://github.com/rust-lang/rust/pull/49162
617 [49184]: https://github.com/rust-lang/rust/pull/49184
618 [49234]: https://github.com/rust-lang/rust/pull/49234
619 [49255]: https://github.com/rust-lang/rust/pull/49255
620 [49299]: https://github.com/rust-lang/rust/pull/49299
621 [49305]: https://github.com/rust-lang/rust/pull/49305
622 [49394]: https://github.com/rust-lang/rust/pull/49394
623 [49458]: https://github.com/rust-lang/rust/pull/49458
624 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
625 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
626 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
627 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
628 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
629 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
630 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
631 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
632 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
633 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
634 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
635 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
636 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
637 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
638 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
639 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
640 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
641 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
642 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
643 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
644 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
645 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
646 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
647 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
648 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
649 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
650 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
651 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
652 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
653 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
654 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
655 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
656 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
657 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
658 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
659 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
660 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
661 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
662 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
663 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
664 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
665 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
668 Version 1.25.0 (2018-03-29)
669 ==========================
673 - [The `#[repr(align(x))]` attribute is now stable.][47006] [RFC 1358]
674 - [You can now use nested groups of imports.][47948]
675 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
676 - [You can now have `|` at the start of a match arm.][47947] e.g.
684 | Foo::B => println!("AB"),
685 | Foo::C => println!("C"),
692 - [Upgraded to LLVM 6.][47828]
693 - [Added `-C lto=val` option.][47521]
694 - [Added `i586-unknown-linux-musl` target][47282]
698 - [Impl Send for `process::Command` on Unix.][47760]
699 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
700 - [`UnsafeCell::into_inner` is now safe.][47204]
701 - [Implement libstd for CloudABI.][47268]
702 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
703 - [Implement `AsRef<Path>` for Component][46985]
704 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
705 - [Moved `Duration` to libcore.][46666]
709 - [`Location::column`]
712 The following functions can now be used in a constant expression.
713 eg. `static MINUTE: Duration = Duration::from_secs(60);`
714 - [`Duration::new`][47300]
715 - [`Duration::from_secs`][47300]
716 - [`Duration::from_millis`][47300]
720 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
721 - [`cargo new` now defaults to creating a binary crate, instead of a
722 library crate.][cargo/5029]
726 - [Rust by example is now shipped with new releases][46196]
730 - [Deprecated `net::lookup_host`.][47510]
731 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
732 - The borrow checker was sometimes incorrectly permitting overlapping borrows
733 around indexing operations (see [#47349][47349]). This has been fixed (which also
734 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
735 - [Removed deprecated unstable attribute `#[simd]`.][47251]
737 [33903]: https://github.com/rust-lang/rust/pull/33903
738 [47947]: https://github.com/rust-lang/rust/pull/47947
739 [47948]: https://github.com/rust-lang/rust/pull/47948
740 [47760]: https://github.com/rust-lang/rust/pull/47760
741 [47790]: https://github.com/rust-lang/rust/pull/47790
742 [47828]: https://github.com/rust-lang/rust/pull/47828
743 [47398]: https://github.com/rust-lang/rust/pull/47398
744 [47510]: https://github.com/rust-lang/rust/pull/47510
745 [47521]: https://github.com/rust-lang/rust/pull/47521
746 [47204]: https://github.com/rust-lang/rust/pull/47204
747 [47251]: https://github.com/rust-lang/rust/pull/47251
748 [47268]: https://github.com/rust-lang/rust/pull/47268
749 [47282]: https://github.com/rust-lang/rust/pull/47282
750 [47300]: https://github.com/rust-lang/rust/pull/47300
751 [47349]: https://github.com/rust-lang/rust/pull/47349
752 [46931]: https://github.com/rust-lang/rust/pull/46931
753 [46985]: https://github.com/rust-lang/rust/pull/46985
754 [47006]: https://github.com/rust-lang/rust/pull/47006
755 [46830]: https://github.com/rust-lang/rust/pull/46830
756 [46095]: https://github.com/rust-lang/rust/pull/46095
757 [46666]: https://github.com/rust-lang/rust/pull/46666
758 [46196]: https://github.com/rust-lang/rust/pull/46196
759 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
760 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
761 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
762 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
763 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
766 Version 1.24.1 (2018-03-01)
767 ==========================
769 - [Do not abort when unwinding through FFI][48251]
770 - [Emit UTF-16 files for linker arguments on Windows][48318]
771 - [Make the error index generator work again][48308]
772 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
774 [48251]: https://github.com/rust-lang/rust/issues/48251
775 [48308]: https://github.com/rust-lang/rust/issues/48308
776 [48318]: https://github.com/rust-lang/rust/issues/48318
777 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
780 Version 1.24.0 (2018-02-15)
781 ==========================
785 - [External `sysv64` ffi is now available.][46528]
786 eg. `extern "sysv64" fn foo () {}`
790 - [rustc now uses 16 codegen units by default for release builds.][46910]
791 For the fastest builds, utilize `codegen-units=1`.
792 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
793 - [Add `aarch64-unknown-openbsd` support][46760]
797 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
798 improvement in performance in the majority of cases.
799 - [`OsStr`'s `Debug` implementation is now lossless and consistent
800 with Windows.][46798]
801 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
802 - [impl `From<bool>` for `AtomicBool`][46293]
803 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
804 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
805 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
806 - [float::from_bits now just uses transmute.][46012] This provides
807 some optimisations from LLVM.
808 - [Copied `AsciiExt` methods onto `char`][46077]
809 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
810 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
811 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
812 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
816 - [`RefCell::replace`]
818 - [`atomic::spin_loop_hint`]
820 The following functions can now be used in a constant expression.
821 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
823 - [`AtomicBool::new`][46287]
824 - [`AtomicUsize::new`][46287]
825 - [`AtomicIsize::new`][46287]
826 - [`AtomicPtr::new`][46287]
827 - [`Cell::new`][46287]
828 - [`{integer}::min_value`][46287]
829 - [`{integer}::max_value`][46287]
830 - [`mem::size_of`][46287]
831 - [`mem::align_of`][46287]
832 - [`ptr::null`][46287]
833 - [`ptr::null_mut`][46287]
834 - [`RefCell::new`][46287]
835 - [`UnsafeCell::new`][46287]
839 - [Added a `workspace.default-members` config that
840 overrides implied `--all` in virtual workspaces.][cargo/4743]
841 - [Enable incremental by default on development builds.][cargo/4817] Also added
842 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
843 per-project or global basis respectively.
850 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
851 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
852 in accordance with IETF RFC 4291 §2.2.
853 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
854 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
855 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
856 - [Leading zeros in tuple struct members is now an error][47084]
857 - [`column!()` macro is one-based instead of zero-based][46977]
858 - [`fmt::Arguments` can no longer be shared across threads][45198]
859 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
860 - [Cargo sets a different working directory for the compiler][cargo/4788]
862 [44884]: https://github.com/rust-lang/rust/pull/44884
863 [45198]: https://github.com/rust-lang/rust/pull/45198
864 [45506]: https://github.com/rust-lang/rust/pull/45506
865 [45904]: https://github.com/rust-lang/rust/pull/45904
866 [45990]: https://github.com/rust-lang/rust/pull/45990
867 [46012]: https://github.com/rust-lang/rust/pull/46012
868 [46077]: https://github.com/rust-lang/rust/pull/46077
869 [46094]: https://github.com/rust-lang/rust/pull/46094
870 [46284]: https://github.com/rust-lang/rust/pull/46284
871 [46287]: https://github.com/rust-lang/rust/pull/46287
872 [46293]: https://github.com/rust-lang/rust/pull/46293
873 [46528]: https://github.com/rust-lang/rust/pull/46528
874 [46671]: https://github.com/rust-lang/rust/pull/46671
875 [46713]: https://github.com/rust-lang/rust/pull/46713
876 [46735]: https://github.com/rust-lang/rust/pull/46735
877 [46749]: https://github.com/rust-lang/rust/pull/46749
878 [46760]: https://github.com/rust-lang/rust/pull/46760
879 [46798]: https://github.com/rust-lang/rust/pull/46798
880 [46828]: https://github.com/rust-lang/rust/pull/46828
881 [46831]: https://github.com/rust-lang/rust/pull/46831
882 [46833]: https://github.com/rust-lang/rust/pull/46833
883 [46910]: https://github.com/rust-lang/rust/pull/46910
884 [46977]: https://github.com/rust-lang/rust/pull/46977
885 [47018]: https://github.com/rust-lang/rust/pull/47018
886 [47080]: https://github.com/rust-lang/rust/pull/47080
887 [47084]: https://github.com/rust-lang/rust/pull/47084
888 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
889 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
890 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
891 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
892 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
893 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
896 Version 1.23.0 (2018-01-04)
897 ==========================
901 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
902 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
903 Which should fix some confusing errors in some operations.
907 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
908 undefined behaviour.][45920]
909 - [rustc now suggests renaming import if names clash.][45660]
910 - [Display errors/warnings correctly when there are zero-width or
911 wide characters.][45711]
912 - [rustc now avoids unnecessary copies of arguments that are
913 simple bindings][45380] This should improve memory usage on average by 5-10%.
914 - [Updated musl used to build musl rustc to 1.1.17][45393]
918 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
919 - [Implement Hash for raw pointers to unsized types][45483]
920 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
921 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
922 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
923 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
924 and `<*mut T>::as_mut`][44932]
925 - [Optimized `Thread::{park, unpark}` implementation][45524]
926 - [Improved `SliceExt::binary_search` performance.][45333]
927 - [impl `FromIterator<()>` for `()`][45379]
928 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
936 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
937 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
938 - [Added unit test checking to `cargo check`][cargo/4592]
939 - [Cargo now lets you install a specific version
940 using `cargo install --version`][cargo/4637]
944 - [Releases now ship with the Cargo book documentation.][45692]
945 - [rustdoc now prints rendering warnings on every run.][45324]
949 - [Changes have been made to type equality to make it more correct,
950 in rare cases this could break some code.][45853] [Tracking issue for
951 further information][45852]
952 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
953 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
954 Android 9, the minimum supported version is Android 14.
955 - [Bumped the minimum LLVM to 3.9][45326]
957 [44042]: https://github.com/rust-lang/rust/pull/44042
958 [44932]: https://github.com/rust-lang/rust/pull/44932
959 [45267]: https://github.com/rust-lang/rust/pull/45267
960 [45324]: https://github.com/rust-lang/rust/pull/45324
961 [45326]: https://github.com/rust-lang/rust/pull/45326
962 [45333]: https://github.com/rust-lang/rust/pull/45333
963 [45379]: https://github.com/rust-lang/rust/pull/45379
964 [45380]: https://github.com/rust-lang/rust/pull/45380
965 [45393]: https://github.com/rust-lang/rust/pull/45393
966 [45435]: https://github.com/rust-lang/rust/pull/45435
967 [45483]: https://github.com/rust-lang/rust/pull/45483
968 [45524]: https://github.com/rust-lang/rust/pull/45524
969 [45571]: https://github.com/rust-lang/rust/pull/45571
970 [45580]: https://github.com/rust-lang/rust/pull/45580
971 [45610]: https://github.com/rust-lang/rust/pull/45610
972 [45660]: https://github.com/rust-lang/rust/pull/45660
973 [45692]: https://github.com/rust-lang/rust/pull/45692
974 [45711]: https://github.com/rust-lang/rust/pull/45711
975 [45772]: https://github.com/rust-lang/rust/pull/45772
976 [45852]: https://github.com/rust-lang/rust/issues/45852
977 [45853]: https://github.com/rust-lang/rust/pull/45853
978 [45887]: https://github.com/rust-lang/rust/pull/45887
979 [45920]: https://github.com/rust-lang/rust/pull/45920
980 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
981 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
982 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
985 Version 1.22.1 (2017-11-22)
986 ==========================
988 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
990 [46183]: https://github.com/rust-lang/rust/pull/46183
992 Version 1.22.0 (2017-11-22)
993 ==========================
997 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
998 - [Now accepts underscores in unicode escapes][43716]
999 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
1000 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
1004 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
1005 - [rustc will no longer inline in codegen units when compiling for debug][45075]
1006 This should decrease compile times for debug builds.
1007 - [strict memory alignment now enabled on ARMv6][45094]
1008 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
1012 - [Allow atomic operations up to 32 bits
1013 on `armv5te_unknown_linux_gnueabi`][44978]
1014 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
1015 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
1016 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
1017 - [Properly detect overflow in `Instant += Duration`.][44220]
1018 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
1019 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
1020 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
1027 - [Cargo will now build multi file examples in subdirectories of the `examples`
1028 folder that have a `main.rs` file.][cargo/4496]
1029 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
1030 the old format will continue to work and can be updated with `cargo update`.
1031 - [Now supports vendoring git repositories][cargo/3992]
1035 - [`libbacktrace` is now available on Apple platforms.][44251]
1036 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
1037 This now lets you specify that a given code example will fail to compile.
1041 - [The minimum Android version that rustc can build for has been bumped
1042 to `4.0` from `2.3`][45656]
1043 - [Allowing `T op= &T` for numeric types has broken some type
1044 inference cases][45480]
1047 [42526]: https://github.com/rust-lang/rust/pull/42526
1048 [43017]: https://github.com/rust-lang/rust/pull/43017
1049 [43716]: https://github.com/rust-lang/rust/pull/43716
1050 [43949]: https://github.com/rust-lang/rust/pull/43949
1051 [44015]: https://github.com/rust-lang/rust/pull/44015
1052 [44220]: https://github.com/rust-lang/rust/pull/44220
1053 [44251]: https://github.com/rust-lang/rust/pull/44251
1054 [44287]: https://github.com/rust-lang/rust/pull/44287
1055 [44303]: https://github.com/rust-lang/rust/pull/44303
1056 [44456]: https://github.com/rust-lang/rust/pull/44456
1057 [44466]: https://github.com/rust-lang/rust/pull/44466
1058 [44895]: https://github.com/rust-lang/rust/pull/44895
1059 [44966]: https://github.com/rust-lang/rust/pull/44966
1060 [44978]: https://github.com/rust-lang/rust/pull/44978
1061 [45041]: https://github.com/rust-lang/rust/pull/45041
1062 [45064]: https://github.com/rust-lang/rust/pull/45064
1063 [45075]: https://github.com/rust-lang/rust/pull/45075
1064 [45094]: https://github.com/rust-lang/rust/pull/45094
1065 [45095]: https://github.com/rust-lang/rust/pull/45095
1066 [45480]: https://github.com/rust-lang/rust/issues/45480
1067 [45656]: https://github.com/rust-lang/rust/pull/45656
1068 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
1069 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
1070 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
1077 Version 1.21.0 (2017-10-12)
1078 ==========================
1082 - [You can now use static references for literals.][43838]
1086 let x: &'static u32 = &0;
1089 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
1092 my_macro!(Vec<i32>::new); // Always worked
1093 my_macro!(Vec::<i32>::new); // Now works
1098 - [Upgraded jemalloc to 4.5.0][43911]
1099 - [Enabled unwinding panics on Redox][43917]
1100 - [Now runs LLVM in parallel during translation phase.][43506]
1101 This should reduce peak memory usage.
1105 - [Generate builtin impls for `Clone` for all arrays and tuples that
1106 are `T: Clone`][43690]
1107 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
1108 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
1109 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
1114 [`std::mem::discriminant`]
1118 - [You can now call `cargo install` with multiple package names][cargo/4216]
1119 - [Cargo commands inside a virtual workspace will now implicitly
1120 pass `--all`][cargo/4335]
1121 - [Added a `[patch]` section to `Cargo.toml` to handle
1122 prepublication dependencies][cargo/4123] [RFC 1969]
1123 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
1124 like patterns][cargo/4270]
1125 - [Added the `--all-targets` option][cargo/4400]
1126 - [Using required dependencies as a feature is now deprecated and emits
1127 a warning][cargo/4364]
1132 - [Cargo docs are moving][43916]
1133 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
1134 - [The rustdoc book is now available][43863]
1135 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
1136 - [Added a preview of RLS has been made available through rustup][44204]
1137 Install with `rustup component add rls-preview`
1138 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
1139 Previously only showed `std::os::unix`.
1143 - [Changes in method matching against higher-ranked types][43880] This may cause
1144 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
1145 - [rustc's JSON error output's byte position start at top of file.][42973]
1146 Was previously relative to the rustc's internal `CodeMap` struct which
1147 required the unstable library `libsyntax` to correctly use.
1148 - [`unused_results` lint no longer ignores booleans][43728]
1150 [42565]: https://github.com/rust-lang/rust/pull/42565
1151 [42973]: https://github.com/rust-lang/rust/pull/42973
1152 [43348]: https://github.com/rust-lang/rust/pull/43348
1153 [43459]: https://github.com/rust-lang/rust/pull/43459
1154 [43506]: https://github.com/rust-lang/rust/pull/43506
1155 [43540]: https://github.com/rust-lang/rust/pull/43540
1156 [43690]: https://github.com/rust-lang/rust/pull/43690
1157 [43728]: https://github.com/rust-lang/rust/pull/43728
1158 [43838]: https://github.com/rust-lang/rust/pull/43838
1159 [43863]: https://github.com/rust-lang/rust/pull/43863
1160 [43880]: https://github.com/rust-lang/rust/pull/43880
1161 [43911]: https://github.com/rust-lang/rust/pull/43911
1162 [43916]: https://github.com/rust-lang/rust/pull/43916
1163 [43917]: https://github.com/rust-lang/rust/pull/43917
1164 [44204]: https://github.com/rust-lang/rust/pull/44204
1165 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
1166 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
1167 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1168 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
1169 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
1170 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
1171 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
1172 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
1173 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
1175 Version 1.20.0 (2017-08-31)
1176 ===========================
1180 - [Associated constants are now stabilised.][42809]
1181 - [A lot of macro bugs are now fixed.][42913]
1186 - [Struct fields are now properly coerced to the expected field type.][42807]
1187 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
1188 `wasm32-experimental-emscripten` target.
1189 - [Changed some of the error messages to be more helpful.][42033]
1190 - [Add support for RELRO(RELocation Read-Only) for platforms that support
1192 - [rustc now reports the total number of errors on compilation failure][43015]
1193 previously this was only the number of errors in the pass that failed.
1194 - [Expansion in rustc has been sped up 29x.][42533]
1195 - [added `msp430-none-elf` target.][43099]
1196 - [rustc will now suggest one-argument enum variant to fix type mismatch when
1198 - [Fixes backtraces on Redox][43228]
1199 - [rustc now identifies different versions of same crate when absolute paths of
1200 different types match in an error message.][42826]
1206 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
1207 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
1209 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
1210 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
1211 - [Impl `Clone` for `DefaultHasher`.][42799]
1212 - [Impl `Sync` for `SyncSender`.][42397]
1213 - [Impl `FromStr` for `char`][42271]
1214 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
1216 - [allow messages in the `unimplemented!()` macro.][42155]
1217 ie. `unimplemented!("Waiting for 1.21 to be stable")`
1218 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
1219 - [Upgrade to Unicode 10.0.0][42999]
1220 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
1221 - [Skip the main thread's manual stack guard on Linux][43072]
1222 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
1223 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
1225 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
1230 - [`CStr::into_c_string`]
1231 - [`CString::as_c_str`]
1232 - [`CString::into_boxed_c_str`]
1233 - [`Chain::get_mut`]
1234 - [`Chain::get_ref`]
1235 - [`Chain::into_inner`]
1236 - [`Option::get_or_insert_with`]
1237 - [`Option::get_or_insert`]
1238 - [`OsStr::into_os_string`]
1239 - [`OsString::into_boxed_os_str`]
1242 - [`Utf8Error::error_len`]
1243 - [`char::EscapeDebug`]
1244 - [`char::escape_debug`]
1245 - [`compile_error!`]
1246 - [`f32::from_bits`]
1248 - [`f64::from_bits`]
1250 - [`mem::ManuallyDrop`]
1251 - [`slice::sort_unstable_by_key`]
1252 - [`slice::sort_unstable_by`]
1253 - [`slice::sort_unstable`]
1254 - [`str::from_boxed_utf8_unchecked`]
1255 - [`str::as_bytes_mut`]
1256 - [`str::as_bytes_mut`]
1257 - [`str::from_utf8_mut`]
1258 - [`str::from_utf8_unchecked_mut`]
1260 - [`str::get_unchecked_mut`]
1261 - [`str::get_unchecked`]
1263 - [`str::into_boxed_bytes`]
1268 - [Cargo API token location moved from `~/.cargo/config` to
1269 `~/.cargo/credentials`.][cargo/3978]
1270 - [Cargo will now build `main.rs` binaries that are in sub-directories of
1271 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
1272 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
1273 - [You can now specify version of a binary when installed through
1274 `cargo install` using `--vers`.][cargo/4229]
1275 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
1276 failure.][cargo/4248]
1277 - [Changed the convention around which file is the crate root.][cargo/4259]
1278 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
1279 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
1284 - [Functions with `'static` in their return types will now not be as usable as
1285 if they were using lifetime parameters instead.][42417]
1286 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
1287 takes the sign of NaN into account where previously didn't.][42430]
1289 [42033]: https://github.com/rust-lang/rust/pull/42033
1290 [42155]: https://github.com/rust-lang/rust/pull/42155
1291 [42271]: https://github.com/rust-lang/rust/pull/42271
1292 [42397]: https://github.com/rust-lang/rust/pull/42397
1293 [42417]: https://github.com/rust-lang/rust/pull/42417
1294 [42430]: https://github.com/rust-lang/rust/pull/42430
1295 [42431]: https://github.com/rust-lang/rust/pull/42431
1296 [42533]: https://github.com/rust-lang/rust/pull/42533
1297 [42571]: https://github.com/rust-lang/rust/pull/42571
1298 [42613]: https://github.com/rust-lang/rust/pull/42613
1299 [42799]: https://github.com/rust-lang/rust/pull/42799
1300 [42807]: https://github.com/rust-lang/rust/pull/42807
1301 [42809]: https://github.com/rust-lang/rust/pull/42809
1302 [42822]: https://github.com/rust-lang/rust/pull/42822
1303 [42826]: https://github.com/rust-lang/rust/pull/42826
1304 [42854]: https://github.com/rust-lang/rust/pull/42854
1305 [42913]: https://github.com/rust-lang/rust/pull/42913
1306 [42999]: https://github.com/rust-lang/rust/pull/42999
1307 [43011]: https://github.com/rust-lang/rust/pull/43011
1308 [43015]: https://github.com/rust-lang/rust/pull/43015
1309 [43072]: https://github.com/rust-lang/rust/pull/43072
1310 [43077]: https://github.com/rust-lang/rust/pull/43077
1311 [43097]: https://github.com/rust-lang/rust/pull/43097
1312 [43099]: https://github.com/rust-lang/rust/pull/43099
1313 [43170]: https://github.com/rust-lang/rust/pull/43170
1314 [43178]: https://github.com/rust-lang/rust/pull/43178
1315 [43185]: https://github.com/rust-lang/rust/pull/43185
1316 [43228]: https://github.com/rust-lang/rust/pull/43228
1317 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
1318 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
1319 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
1320 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
1321 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
1322 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1323 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
1324 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
1325 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
1326 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
1327 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
1328 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
1329 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
1330 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
1331 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
1332 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
1333 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
1334 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
1335 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
1336 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
1337 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
1338 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
1339 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
1340 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
1341 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
1342 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
1343 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
1344 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
1345 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
1346 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
1347 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
1348 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
1349 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
1350 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
1351 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
1352 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
1353 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
1354 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
1355 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
1358 Version 1.19.0 (2017-07-20)
1359 ===========================
1364 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
1365 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
1366 - [Macro recursion limit increased to 1024 from 64.][41676]
1367 - [Added lint for detecting unused macros.][41907]
1368 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
1369 For example: `let x = loop { break 7; };`
1370 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
1371 contain `Copy` types and cannot have a `Drop` implementation.
1372 Example: `union Foo { bar: u8, baz: usize }`
1373 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
1374 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
1379 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
1380 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
1381 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
1382 you should use `--target armv7-linux-androideabi`.
1383 - [Fixed ICE when removing a source file between compilation sessions.][41873]
1384 - [Minor optimisation of string operations.][42037]
1385 - [Compiler error message is now `aborting due to previous error(s)` instead of
1386 `aborting due to N previous errors`][42150] This was previously inaccurate and
1387 would only count certain kinds of errors.
1388 - [The compiler now supports Visual Studio 2017][42225]
1389 - [The compiler is now built against LLVM 4.0.1 by default][42948]
1390 - [Added a lot][42264] of [new error codes][42302]
1391 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
1392 libraries with C Run-time Libraries(CRT) to be statically linked.
1393 - [Fixed various ARM codegen bugs][42740]
1398 - [`String` now implements `FromIterator<Cow<'a, str>>` and
1399 `Extend<Cow<'a, str>>`][41449]
1400 - [`Vec` now implements `From<&mut [T]>`][41530]
1401 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
1402 - [`SplitWhitespace` now implements `Clone`][41659]
1403 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
1405 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
1406 macros, but for printing to stderr.
1411 - [`OsString::shrink_to_fit`]
1414 - [`thread::ThreadId`]
1419 - [Build scripts can now add environment variables to the environment
1420 the crate is being compiled in.
1421 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
1422 - [Subcommands now replace the current process rather than spawning a new
1423 child process][cargo/3970]
1424 - [Workspace members can now accept glob file patterns][cargo/3979]
1425 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
1426 the members in a given workspace.][cargo/3988]
1427 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
1428 - [Target directory path is now in the cargo metadata][cargo/4022]
1429 - [Cargo no longer checks out a local working directory for the
1430 crates.io index][cargo/4026] This should provide smaller file size for the
1431 registry, and improve cloning times, especially on Windows machines.
1432 - [Added an `--exclude` option for excluding certain packages when using the
1433 `--all` option][cargo/4031]
1434 - [Cargo will now automatically retry when receiving a 5xx error
1435 from crates.io][cargo/4032]
1436 - [The `--features` option now accepts multiple comma or space
1437 delimited values.][cargo/4084]
1438 - [Added support for custom target specific runners][cargo/3954]
1443 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
1445 - [Rust will now release XZ compressed packages][rust-installer/57]
1446 - [rustup will now prefer to download rust packages with
1447 XZ compression][rustup/1100] over GZip packages.
1448 - [Added the ability to escape `#` in rust documentation][41785] By adding
1449 additional `#`'s ie. `##` is now `#`
1454 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
1455 - [`-Z` flags are now no longer allowed to be used on the stable
1456 compiler.][41751] This has been a warning for a year previous to this.
1457 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
1458 longer works][42844]. Users should migrate to the built-in `check`
1459 command, which has been available since 1.16.
1460 - [Ending a float literal with `._` is now a hard error.
1461 Example: `42._` .][41946]
1462 - [Any use of a private `extern crate` outside of its module is now a
1463 hard error.][36886] This was previously a warning.
1464 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
1465 relative while the `::` prefix makes a path absolute, but was ignored and the
1466 path was relative regardless.
1467 - [Floating point constants in match patterns is now a hard error][36890]
1468 This was previously a warning.
1469 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
1470 match patterns is now a hard error][36891] This was previously a warning.
1471 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
1473 - [From the pound escape, lines consisting of multiple `#`s are
1475 - [It is an error to re-export private enum variants][42460]. This is
1476 known to break a number of crates that depend on an older version of
1478 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
1479 to use it to find the linker, and the build will fail where it did
1480 not previously][42607]
1482 [36886]: https://github.com/rust-lang/rust/issues/36886
1483 [36888]: https://github.com/rust-lang/rust/issues/36888
1484 [36890]: https://github.com/rust-lang/rust/issues/36890
1485 [36891]: https://github.com/rust-lang/rust/issues/36891
1486 [36892]: https://github.com/rust-lang/rust/issues/36892
1487 [37406]: https://github.com/rust-lang/rust/issues/37406
1488 [39983]: https://github.com/rust-lang/rust/pull/39983
1489 [41145]: https://github.com/rust-lang/rust/pull/41145
1490 [41192]: https://github.com/rust-lang/rust/pull/41192
1491 [41258]: https://github.com/rust-lang/rust/pull/41258
1492 [41370]: https://github.com/rust-lang/rust/pull/41370
1493 [41449]: https://github.com/rust-lang/rust/pull/41449
1494 [41530]: https://github.com/rust-lang/rust/pull/41530
1495 [41624]: https://github.com/rust-lang/rust/pull/41624
1496 [41656]: https://github.com/rust-lang/rust/pull/41656
1497 [41659]: https://github.com/rust-lang/rust/pull/41659
1498 [41676]: https://github.com/rust-lang/rust/pull/41676
1499 [41751]: https://github.com/rust-lang/rust/pull/41751
1500 [41764]: https://github.com/rust-lang/rust/pull/41764
1501 [41785]: https://github.com/rust-lang/rust/pull/41785
1502 [41873]: https://github.com/rust-lang/rust/pull/41873
1503 [41907]: https://github.com/rust-lang/rust/pull/41907
1504 [41946]: https://github.com/rust-lang/rust/pull/41946
1505 [42016]: https://github.com/rust-lang/rust/pull/42016
1506 [42037]: https://github.com/rust-lang/rust/pull/42037
1507 [42068]: https://github.com/rust-lang/rust/pull/42068
1508 [42150]: https://github.com/rust-lang/rust/pull/42150
1509 [42162]: https://github.com/rust-lang/rust/pull/42162
1510 [42225]: https://github.com/rust-lang/rust/pull/42225
1511 [42264]: https://github.com/rust-lang/rust/pull/42264
1512 [42302]: https://github.com/rust-lang/rust/pull/42302
1513 [42460]: https://github.com/rust-lang/rust/issues/42460
1514 [42607]: https://github.com/rust-lang/rust/issues/42607
1515 [42740]: https://github.com/rust-lang/rust/pull/42740
1516 [42844]: https://github.com/rust-lang/rust/issues/42844
1517 [42948]: https://github.com/rust-lang/rust/pull/42948
1518 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
1519 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
1520 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
1521 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
1522 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
1523 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
1524 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
1525 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
1526 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
1527 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
1528 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
1529 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
1530 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
1531 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
1532 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
1533 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
1534 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
1535 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
1536 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
1537 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
1538 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
1539 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
1542 Version 1.18.0 (2017-06-08)
1543 ===========================
1548 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
1549 make the item visible to just that module tree. Also accepts the keyword
1550 `crate` to make something public to the whole crate but not users of the
1551 library. Example: `pub(crate) mod utils;`. [RFC 1422].
1552 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
1553 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
1554 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
1555 types like `Write + Send`, trailing `+` are now supported in trait objects,
1556 and better error reporting for trait objects starting with `?Sized`.
1557 - [0e+10 is now a valid floating point literal][40589]
1558 - [Now warns if you bind a lifetime parameter to 'static][40734]
1559 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
1560 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
1561 representation in some cases.][40377]
1566 - [rustc can now emit mir with `--emit mir`][39891]
1567 - [Improved LLVM IR for trivial functions][40367]
1568 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
1569 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
1570 opportunities found through profiling
1571 - [Improved backtrace formatting when panicking][38165]
1576 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
1577 iterator hasn't been advanced the original `Vec` is reassembled with no actual
1578 iteration or reallocation.
1579 - [Simplified HashMap Bucket interface][40561] provides performance
1580 improvements for iterating and cloning.
1581 - [Specialize Vec::from_elem to use calloc][40409]
1582 - [Fixed Race condition in fs::create_dir_all][39799]
1583 - [No longer caching stdio on Windows][40516]
1584 - [Optimized insertion sort in slice][40807] insertion sort in some cases
1585 2.50%~ faster and in one case now 12.50% faster.
1586 - [Optimized `AtomicBool::fetch_nand`][41143]
1591 - [`Child::try_wait`]
1592 - [`HashMap::retain`]
1593 - [`HashSet::retain`]
1595 - [`TcpStream::peek`]
1596 - [`UdpSocket::peek`]
1597 - [`UdpSocket::peek_from`]
1602 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
1603 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
1604 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
1605 - [Added Android build support][cargo/3885]
1606 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
1607 of a certain type, for example `cargo build --bins` will build all
1609 - [Added support for haiku][cargo/3952]
1614 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
1615 - [Added rust-windbg script for better debugging on Windows][39983]
1616 - [Rust now uses the official cross compiler for NetBSD][40612]
1617 - [rustdoc now accepts `#` at the start of files][40828]
1618 - [Fixed jemalloc support for musl][41168]
1623 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
1624 always placed after the sign if it exists and before the digits. With the `#`
1625 flag the zeroes are placed after the prefix and before the digits.
1626 - [Due to the struct field optimisation][40377], using `transmute` on structs
1627 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
1628 always been undefined behavior, but is now more likely to break in practice.
1629 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
1630 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
1631 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
1632 - [Overlapping inherent `impl`s are now a hard error][40728]
1633 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
1634 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
1635 `out.asm` and `out.ll` instead of only one of the filetypes.
1636 - [ calling a function that returns `Self` will no longer work][41805] when
1637 the size of `Self` cannot be statically determined.
1638 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
1639 this has caused a few regressions namely:
1641 - Changed the link order of local static/dynamic libraries (respecting the
1642 order on given rather than having the compiler reorder).
1643 - Changed how MinGW is linked, native code linked to dynamic libraries
1644 may require manually linking to the gcc support library (for the native
1647 [38165]: https://github.com/rust-lang/rust/pull/38165
1648 [39799]: https://github.com/rust-lang/rust/pull/39799
1649 [39891]: https://github.com/rust-lang/rust/pull/39891
1650 [39983]: https://github.com/rust-lang/rust/pull/39983
1651 [40043]: https://github.com/rust-lang/rust/pull/40043
1652 [40241]: https://github.com/rust-lang/rust/pull/40241
1653 [40338]: https://github.com/rust-lang/rust/pull/40338
1654 [40367]: https://github.com/rust-lang/rust/pull/40367
1655 [40377]: https://github.com/rust-lang/rust/pull/40377
1656 [40409]: https://github.com/rust-lang/rust/pull/40409
1657 [40516]: https://github.com/rust-lang/rust/pull/40516
1658 [40556]: https://github.com/rust-lang/rust/pull/40556
1659 [40561]: https://github.com/rust-lang/rust/pull/40561
1660 [40589]: https://github.com/rust-lang/rust/pull/40589
1661 [40612]: https://github.com/rust-lang/rust/pull/40612
1662 [40723]: https://github.com/rust-lang/rust/pull/40723
1663 [40728]: https://github.com/rust-lang/rust/pull/40728
1664 [40731]: https://github.com/rust-lang/rust/pull/40731
1665 [40734]: https://github.com/rust-lang/rust/pull/40734
1666 [40805]: https://github.com/rust-lang/rust/pull/40805
1667 [40807]: https://github.com/rust-lang/rust/pull/40807
1668 [40828]: https://github.com/rust-lang/rust/pull/40828
1669 [40870]: https://github.com/rust-lang/rust/pull/40870
1670 [41085]: https://github.com/rust-lang/rust/pull/41085
1671 [41143]: https://github.com/rust-lang/rust/pull/41143
1672 [41168]: https://github.com/rust-lang/rust/pull/41168
1673 [41270]: https://github.com/rust-lang/rust/issues/41270
1674 [41469]: https://github.com/rust-lang/rust/pull/41469
1675 [41805]: https://github.com/rust-lang/rust/issues/41805
1676 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
1677 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
1678 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
1679 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
1680 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
1681 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
1682 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
1683 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
1684 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
1685 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
1686 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
1687 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
1688 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
1689 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
1692 Version 1.17.0 (2017-04-27)
1693 ===========================
1698 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
1699 * [Fields of structs may be initialized without duplicating the field/variable
1700 names][39761]. [RFC 1682]
1701 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
1702 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1703 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
1704 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
1705 `'b`. Soundness fix.
1706 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
1707 * [Static variables may contain references to other statics][40027]
1712 * [Exit quickly on only `--emit dep-info`][40336]
1713 * [Make `-C relocation-model` more correctly determine whether the linker
1714 creates a position-independent executable][40245]
1715 * [Add `-C overflow-checks` to directly control whether integer overflow
1717 * [The rustc type checker now checks items on demand instead of in a single
1718 in-order pass][40008]. This is mostly an internal refactoring in support of
1719 future work, including incremental type checking, but also resolves [RFC
1720 1647], allowing `Self` to appear in `impl` `where` clauses.
1721 * [Optimize vtable loads][39995]
1722 * [Turn off vectorization for Emscripten targets][39990]
1723 * [Provide suggestions for unknown macros imported with `use`][39953]
1724 * [Fix ICEs in path resolution][39939]
1725 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
1726 * [Add clearer error message using `&str + &str`][39116]
1737 * [`Ordering::then`]
1738 * [`Ordering::then_with`]
1739 * [`BTreeMap::range`]
1740 * [`BTreeMap::range_mut`]
1741 * [`collections::Bound`]
1742 * [`process::abort`]
1743 * [`ptr::read_unaligned`]
1744 * [`ptr::write_unaligned`]
1745 * [`Result::expect_err`]
1748 * [`Cell::into_inner`]
1754 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
1755 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
1756 * [`String` implements `FromIterator<&char>`][40028]
1757 * `Box` [implements][40009] a number of new conversions:
1758 `From<Box<str>> for String`,
1759 `From<Box<[T]>> for Vec<T>`,
1760 `From<Box<CStr>> for CString`,
1761 `From<Box<OsStr>> for OsString`,
1762 `From<Box<Path>> for PathBuf`,
1763 `Into<Box<str>> for String`,
1764 `Into<Box<[T]>> for Vec<T>`,
1765 `Into<Box<CStr>> for CString`,
1766 `Into<Box<OsStr>> for OsString`,
1767 `Into<Box<Path>> for PathBuf`,
1768 `Default for Box<str>`,
1769 `Default for Box<CStr>`,
1770 `Default for Box<OsStr>`,
1771 `From<&CStr> for Box<CStr>`,
1772 `From<&OsStr> for Box<OsStr>`,
1773 `From<&Path> for Box<Path>`
1774 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
1775 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
1776 * [Slightly optimize `slice::sort`][39538]
1777 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
1778 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
1779 `Box<str>` implements `From<&str>`][39438]
1780 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
1781 `From<(I, u16)> where I: Into<IpAddr>`][39372]
1782 * [`format!` estimates the needed capacity before writing a string][39356]
1783 * [Support unprivileged symlink creation in Windows][38921]
1784 * [`PathBuf` implements `Default`][38764]
1785 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
1786 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
1787 and poor hash functions.
1792 * [Add `cargo check --all`][cargo/3731]
1793 * [Add an option to ignore SSL revocation checking][cargo/3699]
1794 * [Add `cargo run --package`][cargo/3691]
1795 * [Add `required_features`][cargo/3667]
1796 * [Assume `build.rs` is a build script][cargo/3664]
1797 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
1802 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
1804 * [The "Unstable Book" documents nightly-only features][ubook]
1805 * [Improve the style of the sidebar in rustdoc output][40265]
1806 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
1807 * [Fix MSP430 breakage due to `i128`][40257]
1808 * [Preliminary Solaris/SPARCv9 support][39903]
1809 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
1810 run without installing the MSVC runtime.
1811 * [`rustdoc --test` includes file names in test names][39788]
1812 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
1813 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
1814 * [Initial support for `aarch64-unknown-freebsd`][39491]
1815 * [Initial support for `i686-unknown-netbsd`][39426]
1816 * [This release no longer includes the old makefile build system][39431]. Rust
1817 is built with a custom build system, written in Rust, and with Cargo.
1818 * [Add Debug implementations for libcollection structs][39002]
1819 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
1820 * [`--test-threads=0` produces an error][38945]
1821 * [`rustup` installs documentation by default][40526]
1822 * [The Rust source includes NatVis visualizations][39843]. These can be used by
1823 WinDbg and Visual Studio to improve the debugging experience.
1828 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
1829 workaround, either use MSVC 2015 or run vcvars.bat.
1830 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1831 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
1832 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
1834 * [`format!` and `Display::to_string` panic if an underlying formatting
1835 implementation returns an error][40117]. Previously the error was silently
1836 ignored. It is incorrect for `write_fmt` to return an error when writing
1838 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
1839 crates were marked stable and could be accessed from the stable toolchain.
1840 * [Rust git source no longer includes vendored crates][39728]. Those that need
1841 to build with vendored crates should build from release tarballs.
1842 * [Fix inert attributes from `proc_macro_derives`][39572]
1843 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
1844 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
1846 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
1847 existing code generally ignores the type of dead-code unless a type-hint is
1848 provided; this can cause surprising inference interactions particularly around
1849 defaulting. The new code uniformly ignores the result type of dead-code.
1850 * [Tuple-struct constructors with private fields are no longer visible][38932]
1851 * [Lifetime parameters that do not appear in the arguments are now considered
1852 early-bound][38897], resolving a soundness bug (#[32330]). The
1853 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
1855 * [rustdoc: fix doctests with non-feature crate attributes][38161]
1856 * [Make transmuting from fn item types to pointer-sized types a hard
1859 [27787]: https://github.com/rust-lang/rust/issues/27787
1860 [32330]: https://github.com/rust-lang/rust/issues/32330
1861 [34198]: https://github.com/rust-lang/rust/pull/34198
1862 [38161]: https://github.com/rust-lang/rust/pull/38161
1863 [38368]: https://github.com/rust-lang/rust/pull/38368
1864 [38584]: https://github.com/rust-lang/rust/issues/38584
1865 [38661]: https://github.com/rust-lang/rust/pull/38661
1866 [38764]: https://github.com/rust-lang/rust/pull/38764
1867 [38864]: https://github.com/rust-lang/rust/issues/38864
1868 [38897]: https://github.com/rust-lang/rust/pull/38897
1869 [38921]: https://github.com/rust-lang/rust/pull/38921
1870 [38932]: https://github.com/rust-lang/rust/pull/38932
1871 [38945]: https://github.com/rust-lang/rust/pull/38945
1872 [38981]: https://github.com/rust-lang/rust/pull/38981
1873 [39002]: https://github.com/rust-lang/rust/pull/39002
1874 [39116]: https://github.com/rust-lang/rust/pull/39116
1875 [39193]: https://github.com/rust-lang/rust/pull/39193
1876 [39265]: https://github.com/rust-lang/rust/pull/39265
1877 [39356]: https://github.com/rust-lang/rust/pull/39356
1878 [39372]: https://github.com/rust-lang/rust/pull/39372
1879 [39426]: https://github.com/rust-lang/rust/pull/39426
1880 [39431]: https://github.com/rust-lang/rust/pull/39431
1881 [39438]: https://github.com/rust-lang/rust/pull/39438
1882 [39440]: https://github.com/rust-lang/rust/pull/39440
1883 [39485]: https://github.com/rust-lang/rust/pull/39485
1884 [39491]: https://github.com/rust-lang/rust/pull/39491
1885 [39518]: https://github.com/rust-lang/rust/pull/39518
1886 [39538]: https://github.com/rust-lang/rust/pull/39538
1887 [39572]: https://github.com/rust-lang/rust/pull/39572
1888 [39633]: https://github.com/rust-lang/rust/pull/39633
1889 [39642]: https://github.com/rust-lang/rust/pull/39642
1890 [39728]: https://github.com/rust-lang/rust/pull/39728
1891 [39761]: https://github.com/rust-lang/rust/pull/39761
1892 [39788]: https://github.com/rust-lang/rust/pull/39788
1893 [39793]: https://github.com/rust-lang/rust/pull/39793
1894 [39837]: https://github.com/rust-lang/rust/pull/39837
1895 [39843]: https://github.com/rust-lang/rust/pull/39843
1896 [39851]: https://github.com/rust-lang/rust/pull/39851
1897 [39903]: https://github.com/rust-lang/rust/pull/39903
1898 [39939]: https://github.com/rust-lang/rust/pull/39939
1899 [39953]: https://github.com/rust-lang/rust/pull/39953
1900 [39960]: https://github.com/rust-lang/rust/pull/39960
1901 [39990]: https://github.com/rust-lang/rust/pull/39990
1902 [39995]: https://github.com/rust-lang/rust/pull/39995
1903 [40008]: https://github.com/rust-lang/rust/pull/40008
1904 [40009]: https://github.com/rust-lang/rust/pull/40009
1905 [40027]: https://github.com/rust-lang/rust/pull/40027
1906 [40028]: https://github.com/rust-lang/rust/pull/40028
1907 [40037]: https://github.com/rust-lang/rust/pull/40037
1908 [40117]: https://github.com/rust-lang/rust/pull/40117
1909 [40166]: https://github.com/rust-lang/rust/pull/40166
1910 [40245]: https://github.com/rust-lang/rust/pull/40245
1911 [40257]: https://github.com/rust-lang/rust/pull/40257
1912 [40261]: https://github.com/rust-lang/rust/pull/40261
1913 [40265]: https://github.com/rust-lang/rust/pull/40265
1914 [40319]: https://github.com/rust-lang/rust/pull/40319
1915 [40336]: https://github.com/rust-lang/rust/pull/40336
1916 [40526]: https://github.com/rust-lang/rust/pull/40526
1917 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1918 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
1919 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
1920 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
1921 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
1922 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
1923 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
1924 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
1925 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
1926 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
1927 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
1928 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
1929 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
1930 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
1931 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
1932 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
1933 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
1934 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
1935 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
1936 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
1937 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
1938 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
1939 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
1940 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
1941 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
1942 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
1943 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
1944 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
1945 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
1946 [mdbook]: https://crates.io/crates/mdbook
1947 [ubook]: https://doc.rust-lang.org/unstable-book/
1950 Version 1.16.0 (2017-03-16)
1951 ===========================
1956 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1957 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1958 match patterns][38069]
1959 * [Clean up semantics of `self` in an import list][38313]
1960 * [`Self` may appear in `impl` headers][38920]
1961 * [`Self` may appear in struct expressions][39282]
1966 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
1967 a `.rmeta` file containing only crate metadata][38571]. This can be
1968 used by tools like the Rust Language Service to perform
1969 metadata-only builds.
1970 * [Levenshtein based typo suggestions now work in most places, while
1971 previously they worked only for fields and sometimes for local
1972 variables][38927]. Together with the overhaul of "no
1973 resolution"/"unexpected resolution" errors (#[38154]) they result in
1974 large and systematic improvement in resolution diagnostics.
1975 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
1977 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
1978 * [`rustc` no longer attempts to provide "consider using an explicit
1979 lifetime" suggestions][37057]. They were inaccurate.
1984 * [`VecDeque::truncate`]
1985 * [`VecDeque::resize`]
1986 * [`String::insert_str`]
1987 * [`Duration::checked_add`]
1988 * [`Duration::checked_sub`]
1989 * [`Duration::checked_div`]
1990 * [`Duration::checked_mul`]
1993 * [`SocketAddr::is_ipv4`]
1994 * [`SocketAddr::is_ipv6`]
1995 * [`IpAddr::is_ipv4`]
1996 * [`IpAddr::is_ipv6`]
1998 * [`Vec::dedup_by_key`]
1999 * [`Result::unwrap_or_default`]
2000 * [`<*const T>::wrapping_offset`]
2001 * [`<*mut T>::wrapping_offset`]
2002 * `CommandExt::creation_flags`
2003 * [`File::set_permissions`]
2004 * [`String::split_off`]
2009 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
2010 their argument by `Borrow` parameter][37761]
2011 * [All public types in std implement `Debug`][38006]
2012 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
2013 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
2014 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
2016 * [std: Fix partial writes in `LineWriter`][38062]
2017 * [std: Clamp max read/write sizes on Unix][38062]
2018 * [Use more specific panic message for `&str` slicing errors][38066]
2019 * [`TcpListener::set_only_v6` is deprecated][38304]. This
2020 functionality cannot be achieved in std currently.
2021 * [`writeln!`, like `println!`, now accepts a form with no string
2022 or formatting arguments, to just print a newline][38469]
2023 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
2024 * [Reduce the size of static data in `std_unicode::tables`][38781]
2025 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
2026 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
2028 * [`Duration` implements `Sum`][38712]
2029 * [`String` implements `ToSocketAddrs`][39048]
2034 * [The `cargo check` command does a type check of a project without
2035 building it][cargo/3296]
2036 * [crates.io will display CI badges from Travis and AppVeyor, if
2037 specified in Cargo.toml][cargo/3546]
2038 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
2039 * [Compilation profiles accept integer values for `debug`, in addition
2040 to `true` and `false`. These are passed to `rustc` as the value to
2041 `-C debuginfo`][cargo/3534]
2042 * [Implement `cargo --version --verbose`][cargo/3604]
2043 * [All builds now output 'dep-info' build dependencies compatible with
2044 make and ninja][cargo/3557]
2045 * [Build all workspace members with `build --all`][cargo/3511]
2046 * [Document all workspace members with `doc --all`][cargo/3515]
2047 * [Path deps outside workspace are not members][cargo/3443]
2052 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
2053 the path to the Rust implementation][38589]
2054 * [The `armv7-linux-androideabi` target no longer enables NEON
2055 extensions, per Google's ABI guide][38413]
2056 * [The stock standard library can be compiled for Redox OS][38401]
2057 * [Rust has initial SPARC support][38726]. Tier 3. No builds
2059 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
2061 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
2066 * [Uninhabitable enums (those without any variants) no longer permit wildcard
2067 match patterns][38069]
2068 * In this release, references to uninhabited types can not be
2069 pattern-matched. This was accidentally allowed in 1.15.
2070 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
2071 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
2073 * [Clean up semantics of `self` in an import list][38313]
2074 * Reimplemented lifetime elision. This change was almost entirely compatible
2075 with existing code, but it did close a number of small bugs and loopholes,
2076 as well as being more accepting in some other [cases][41105].
2078 [37057]: https://github.com/rust-lang/rust/pull/37057
2079 [37761]: https://github.com/rust-lang/rust/pull/37761
2080 [38006]: https://github.com/rust-lang/rust/pull/38006
2081 [38051]: https://github.com/rust-lang/rust/pull/38051
2082 [38062]: https://github.com/rust-lang/rust/pull/38062
2083 [38062]: https://github.com/rust-lang/rust/pull/38622
2084 [38066]: https://github.com/rust-lang/rust/pull/38066
2085 [38069]: https://github.com/rust-lang/rust/pull/38069
2086 [38131]: https://github.com/rust-lang/rust/pull/38131
2087 [38154]: https://github.com/rust-lang/rust/pull/38154
2088 [38274]: https://github.com/rust-lang/rust/pull/38274
2089 [38304]: https://github.com/rust-lang/rust/pull/38304
2090 [38313]: https://github.com/rust-lang/rust/pull/38313
2091 [38314]: https://github.com/rust-lang/rust/pull/38314
2092 [38327]: https://github.com/rust-lang/rust/pull/38327
2093 [38401]: https://github.com/rust-lang/rust/pull/38401
2094 [38413]: https://github.com/rust-lang/rust/pull/38413
2095 [38469]: https://github.com/rust-lang/rust/pull/38469
2096 [38559]: https://github.com/rust-lang/rust/pull/38559
2097 [38571]: https://github.com/rust-lang/rust/pull/38571
2098 [38580]: https://github.com/rust-lang/rust/pull/38580
2099 [38589]: https://github.com/rust-lang/rust/pull/38589
2100 [38670]: https://github.com/rust-lang/rust/pull/38670
2101 [38712]: https://github.com/rust-lang/rust/pull/38712
2102 [38726]: https://github.com/rust-lang/rust/pull/38726
2103 [38781]: https://github.com/rust-lang/rust/pull/38781
2104 [38798]: https://github.com/rust-lang/rust/pull/38798
2105 [38909]: https://github.com/rust-lang/rust/pull/38909
2106 [38920]: https://github.com/rust-lang/rust/pull/38920
2107 [38927]: https://github.com/rust-lang/rust/pull/38927
2108 [39048]: https://github.com/rust-lang/rust/pull/39048
2109 [39282]: https://github.com/rust-lang/rust/pull/39282
2110 [39379]: https://github.com/rust-lang/rust/pull/39379
2111 [41105]: https://github.com/rust-lang/rust/issues/41105
2112 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2113 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2114 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
2115 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
2116 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
2117 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
2118 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
2119 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
2120 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
2121 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
2122 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
2123 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
2124 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
2125 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
2126 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
2127 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
2128 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
2129 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
2130 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
2131 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
2132 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
2133 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
2134 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
2135 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
2136 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
2137 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
2138 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
2139 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
2140 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
2141 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
2144 Version 1.15.1 (2017-02-09)
2145 ===========================
2147 * [Fix IntoIter::as_mut_slice's signature][39466]
2148 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
2150 [39466]: https://github.com/rust-lang/rust/pull/39466
2151 [39523]: https://github.com/rust-lang/rust/pull/39523
2154 Version 1.15.0 (2017-02-02)
2155 ===========================
2160 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
2161 stable. This allows popular code-generating crates like Serde and Diesel to
2162 work ergonomically. [RFC 1681].
2163 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
2164 with curly braces][36868]. Part of [RFC 1506].
2165 * [A number of minor changes to name resolution have been activated][37127].
2166 They add up to more consistent semantics, allowing for future evolution of
2167 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2168 details of what is different. The breaking changes here have been transitioned
2169 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2170 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
2172 * [`?Sized` can be used in `where` clauses][37791]
2173 * [There is now a limit on the size of monomorphized types and it can be
2174 modified with the `#![type_size_limit]` crate attribute, similarly to
2175 the `#![recursion_limit]` attribute][37789]
2180 * [On Windows, the compiler will apply dllimport attributes when linking to
2181 extern functions][37973]. Additional attributes and flags can control which
2182 library kind is linked and its name. [RFC 1717].
2183 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2184 * [The `--test` flag works with procedural macro crates][38107]
2185 * [Fix `extern "aapcs" fn` ABI][37814]
2186 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
2187 * [The `format!` expander recognizes incorrect `printf` and shell-style
2188 formatting directives and suggests the correct format][37613].
2189 * [Only report one error for all unused imports in an import list][37456]
2191 Compiler Performance
2192 --------------------
2194 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
2195 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
2196 * [Don't clone in `UnificationTable::probe`][37848]
2197 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
2198 * [Use small vectors in type walker][37760]
2199 * [Macro expansion performance was improved][37701]
2200 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
2201 * [Replace FNV with a faster hash function][37229]
2206 * [`std::iter::Iterator::min_by`]
2207 * [`std::iter::Iterator::max_by`]
2208 * [`std::os::*::fs::FileExt`]
2209 * [`std::sync::atomic::Atomic*::get_mut`]
2210 * [`std::sync::atomic::Atomic*::into_inner`]
2211 * [`std::vec::IntoIter::as_slice`]
2212 * [`std::vec::IntoIter::as_mut_slice`]
2213 * [`std::sync::mpsc::Receiver::try_iter`]
2214 * [`std::os::unix::process::CommandExt::before_exec`]
2215 * [`std::rc::Rc::strong_count`]
2216 * [`std::rc::Rc::weak_count`]
2217 * [`std::sync::Arc::strong_count`]
2218 * [`std::sync::Arc::weak_count`]
2219 * [`std::char::encode_utf8`]
2220 * [`std::char::encode_utf16`]
2221 * [`std::cell::Ref::clone`]
2222 * [`std::io::Take::into_inner`]
2227 * [The standard sorting algorithm has been rewritten for dramatic performance
2228 improvements][38192]. It is a hybrid merge sort, drawing influences from
2229 Timsort. Previously it was a naive merge sort.
2230 * [`Iterator::nth` no longer has a `Sized` bound][38134]
2231 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
2233 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
2234 and `char_indices().last()`][37882]
2235 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
2236 * [Chinese characters display correctly in `fmt::Debug`][37855]
2237 * [Derive `Default` for `Duration`][37699]
2238 * [Support creation of anonymous pipes on WinXP/2k][37677]
2239 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
2240 * [Don't pass overlapped handles to processes][38835]
2245 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2246 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2247 should instead check the variable at runtime with `std::env`. That the value
2248 was set at build time was a bug, and incorrect when cross-compiling. This
2249 change is known to cause breakage.
2250 * [Add `--all` flag to `cargo test`][cargo/3221]
2251 * [Compile statically against the MSVC CRT][cargo/3363]
2252 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
2253 * [Link OpenSSL statically on OSX][cargo/3311]
2254 * [Apply new fingerprinting to build dir outputs][cargo/3310]
2255 * [Test for bad path overrides with summaries][cargo/3336]
2256 * [Require `cargo install --vers` to take a semver version][cargo/3338]
2257 * [Fix retrying crate downloads for network errors][cargo/3348]
2258 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
2259 * [Emit more info on --message-format=json][cargo/3319]
2260 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
2261 * [Don't ignore errors in workspace manifest][cargo/3409]
2262 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
2267 * [Test runners (binaries built with `--test`) now support a `--list` argument
2268 that lists the tests it contains][38185]
2269 * [Test runners now support a `--exact` argument that makes the test filter
2270 match exactly, instead of matching only a substring of the test name][38181]
2271 * [rustdoc supports a `--playground-url` flag][37763]
2272 * [rustdoc provides more details about `#[should_panic]` errors][37749]
2277 * [The Rust build system is now written in Rust][37817]. The Makefiles may
2278 continue to be used in this release by passing `--disable-rustbuild` to the
2279 configure script, but they will be deleted soon. Note that the new build
2280 system uses a different on-disk layout that will likely affect any scripts
2282 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
2284 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
2285 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
2291 * [A number of minor changes to name resolution have been activated][37127].
2292 They add up to more consistent semantics, allowing for future evolution of
2293 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2294 details of what is different. The breaking changes here have been transitioned
2295 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2296 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2297 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2298 should instead check the variable at runtime with `std::env`. That the value
2299 was set at build time was a bug, and incorrect when cross-compiling. This
2300 change is known to cause breakage.
2301 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
2302 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
2303 1.10 and is now an error by default. It will become a hard error in the near
2305 * [The semantics relating modules to file system directories are changing in
2306 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
2307 lint, which is a warning in this release, and will become a hard error in the
2309 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2310 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
2311 the underlying iterator][37834]
2313 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
2314 [33685]: https://github.com/rust-lang/rust/issues/33685
2315 [36868]: https://github.com/rust-lang/rust/pull/36868
2316 [37127]: https://github.com/rust-lang/rust/pull/37127
2317 [37229]: https://github.com/rust-lang/rust/pull/37229
2318 [37456]: https://github.com/rust-lang/rust/pull/37456
2319 [37527]: https://github.com/rust-lang/rust/pull/37527
2320 [37602]: https://github.com/rust-lang/rust/pull/37602
2321 [37613]: https://github.com/rust-lang/rust/pull/37613
2322 [37615]: https://github.com/rust-lang/rust/pull/37615
2323 [37636]: https://github.com/rust-lang/rust/pull/37636
2324 [37627]: https://github.com/rust-lang/rust/pull/37627
2325 [37642]: https://github.com/rust-lang/rust/pull/37642
2326 [37677]: https://github.com/rust-lang/rust/pull/37677
2327 [37699]: https://github.com/rust-lang/rust/pull/37699
2328 [37701]: https://github.com/rust-lang/rust/pull/37701
2329 [37705]: https://github.com/rust-lang/rust/pull/37705
2330 [37749]: https://github.com/rust-lang/rust/pull/37749
2331 [37760]: https://github.com/rust-lang/rust/pull/37760
2332 [37763]: https://github.com/rust-lang/rust/pull/37763
2333 [37764]: https://github.com/rust-lang/rust/pull/37764
2334 [37789]: https://github.com/rust-lang/rust/pull/37789
2335 [37791]: https://github.com/rust-lang/rust/pull/37791
2336 [37814]: https://github.com/rust-lang/rust/pull/37814
2337 [37817]: https://github.com/rust-lang/rust/pull/37817
2338 [37834]: https://github.com/rust-lang/rust/pull/37834
2339 [37848]: https://github.com/rust-lang/rust/pull/37848
2340 [37855]: https://github.com/rust-lang/rust/pull/37855
2341 [37882]: https://github.com/rust-lang/rust/pull/37882
2342 [37888]: https://github.com/rust-lang/rust/pull/37888
2343 [37973]: https://github.com/rust-lang/rust/pull/37973
2344 [37979]: https://github.com/rust-lang/rust/pull/37979
2345 [38086]: https://github.com/rust-lang/rust/pull/38086
2346 [38107]: https://github.com/rust-lang/rust/pull/38107
2347 [38117]: https://github.com/rust-lang/rust/pull/38117
2348 [38134]: https://github.com/rust-lang/rust/pull/38134
2349 [38146]: https://github.com/rust-lang/rust/pull/38146
2350 [38181]: https://github.com/rust-lang/rust/pull/38181
2351 [38182]: https://github.com/rust-lang/rust/pull/38182
2352 [38185]: https://github.com/rust-lang/rust/pull/38185
2353 [38192]: https://github.com/rust-lang/rust/pull/38192
2354 [38279]: https://github.com/rust-lang/rust/pull/38279
2355 [38835]: https://github.com/rust-lang/rust/pull/38835
2356 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2357 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2358 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
2359 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
2360 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
2361 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
2362 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
2363 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
2364 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
2365 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
2366 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
2367 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
2368 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
2369 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
2370 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
2371 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
2372 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
2373 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
2374 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
2375 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
2376 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
2377 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
2378 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
2379 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
2380 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
2381 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
2382 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
2383 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
2384 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
2385 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
2386 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
2387 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
2388 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
2389 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
2390 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
2391 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
2392 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
2393 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
2396 Version 1.14.0 (2016-12-22)
2397 ===========================
2402 * [`..` matches multiple tuple fields in enum variants, structs
2403 and tuples][36843]. [RFC 1492].
2404 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
2405 * [`use *` and `use ::*` both glob-import from the crate root][37367]
2406 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
2407 dereferencing][36822]
2412 * [Mark enums with non-zero discriminant as non-zero][37224]
2413 * [Lower-case `static mut` names are linted like other
2414 statics and consts][37162]
2415 * [Fix ICE on some macros in const integer positions
2416 (e.g. `[u8; m!()]`)][36819]
2417 * [Improve error message and snippet for "did you mean `x`"][36798]
2418 * [Add a panic-strategy field to the target specification][36794]
2419 * [Include LLVM version in `--version --verbose`][37200]
2421 Compile-time Optimizations
2422 --------------------------
2424 * [Improve macro expansion performance][37569]
2425 * [Shrink `Expr_::ExprInlineAsm`][37445]
2426 * [Replace all uses of SHA-256 with BLAKE2b][37439]
2427 * [Reduce the number of bytes hashed by `IchHasher`][37427]
2428 * [Avoid more allocations when compiling html5ever][37373]
2429 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
2430 * [Avoid some allocations in the macro parser][37318]
2431 * [Use a faster deflate setting][37298]
2432 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
2433 during interning of slices][37270]
2434 * [Optimize `write_metadata`][37267]
2435 * [Don't process obligation forest cycles when stalled][37231]
2436 * [Avoid many `CrateConfig` clones][37161]
2437 * [Optimize `Substs::super_fold_with`][37108]
2438 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
2439 * [Speed up `plug_leaks`][36917]
2444 * [`println!()`, with no arguments, prints newline][36825].
2445 Previously, an empty string was required to achieve the same.
2446 * [`Wrapping` impls standard binary and unary operators, as well as
2447 the `Sum` and `Product` iterators][37356]
2448 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
2450 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
2451 `VecDeque` iterators][37315]
2452 * [Improve `SipHasher` performance on small values][37312]
2453 * [Add Iterator trait TrustedLen to enable better FromIterator /
2455 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
2456 * [`ReadDir` implements `Debug`][37221]
2457 * [Implement `RefUnwindSafe` for atomic types][37178]
2458 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
2459 * [Avoid allocations in `Decoder::read_str`][37064]
2460 * [`io::Error` implements `From<io::ErrorKind>`][37037]
2461 * [Impl `Debug` for raw pointers to unsized data][36880]
2462 * [Don't reuse `HashMap` random seeds][37470]
2463 * [The internal memory layout of `HashMap` is more cache-friendly, for
2464 significant improvements in some operations][36692]
2465 * [`HashMap` uses less memory on 32-bit architectures][36595]
2466 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
2471 * [Expose rustc cfg values to build scripts][cargo/3243]
2472 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
2473 * [Fix passing --features when testing multiple packages][cargo/3280]
2474 * [Use a single profile set per workspace][cargo/3249]
2475 * [Load `replace` sections from lock files][cargo/3220]
2476 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
2481 * [rustup is the recommended Rust installation method][1.14rustup]
2482 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
2483 S390x. These are [tier 2] platforms and may have major defects. Follow the
2484 instructions on the website to install, or add the targets to an existing
2485 installation with `rustup target add`. The new target triples are:
2486 - `mips-unknown-linux-gnu`
2487 - `mipsel-unknown-linux-gnu`
2488 - `mips64-unknown-linux-gnuabi64`
2489 - `mips64el-unknown-linux-gnuabi64 `
2490 - `powerpc-unknown-linux-gnu`
2491 - `powerpc64-unknown-linux-gnu`
2492 - `powerpc64le-unknown-linux-gnu`
2493 - `s390x-unknown-linux-gnu `
2494 * This release includes target (std) builds for ARM Linux running MUSL
2495 libc. These are [tier 2] platforms and may have major defects. Add the
2496 following triples to an existing rustup installation with `rustup target add`:
2497 - `arm-unknown-linux-musleabi`
2498 - `arm-unknown-linux-musleabihf`
2499 - `armv7-unknown-linux-musleabihf`
2500 * This release includes [experimental support for WebAssembly][1.14wasm], via
2501 the `wasm32-unknown-emscripten` target. This target is known to have major
2502 defects. Please test, report, and fix.
2503 * rustup no longer installs documentation by default. Run `rustup
2504 component add rust-docs` to install.
2505 * [Fix line stepping in debugger][37310]
2506 * [Enable line number debuginfo in releases][37280]
2511 * [Disable jemalloc on aarch64/powerpc/mips][37392]
2512 * [Add support for Fuchsia OS][37313]
2513 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
2518 * [A number of forward-compatibility lints used by the compiler
2519 to gradually introduce language changes have been converted
2520 to deny by default][36894]:
2521 - ["use of inaccessible extern crate erroneously allowed"][36886]
2522 - ["type parameter default erroneously allowed in invalid location"][36887]
2523 - ["detects super or self keywords at the beginning of global path"][36888]
2524 - ["two overlapping inherent impls define an item with the same name
2525 were erroneously allowed"][36889]
2526 - ["floating-point constants cannot be used in patterns"][36890]
2527 - ["constants of struct or enum type can only be used in a pattern if
2528 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
2529 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
2530 * [Prohibit patterns in trait methods without bodies][37378]
2531 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
2532 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
2533 * [The `$crate` macro variable is accepted in fewer locations][37213]
2534 * [Impls specifying extra region requirements beyond the trait
2535 they implement are rejected][37167]
2536 * [Enums may not be unsized][37111]. Unsized enums are intended to
2537 work but never have. For now they are forbidden.
2538 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
2540 [tier 2]: https://forge.rust-lang.org/platform-support.html
2541 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
2542 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
2543 [36430]: https://github.com/rust-lang/rust/pull/36430
2544 [36595]: https://github.com/rust-lang/rust/pull/36595
2545 [36595]: https://github.com/rust-lang/rust/pull/36595
2546 [36692]: https://github.com/rust-lang/rust/pull/36692
2547 [36767]: https://github.com/rust-lang/rust/pull/36767
2548 [36794]: https://github.com/rust-lang/rust/pull/36794
2549 [36798]: https://github.com/rust-lang/rust/pull/36798
2550 [36819]: https://github.com/rust-lang/rust/pull/36819
2551 [36822]: https://github.com/rust-lang/rust/pull/36822
2552 [36825]: https://github.com/rust-lang/rust/pull/36825
2553 [36843]: https://github.com/rust-lang/rust/pull/36843
2554 [36880]: https://github.com/rust-lang/rust/pull/36880
2555 [36886]: https://github.com/rust-lang/rust/issues/36886
2556 [36887]: https://github.com/rust-lang/rust/issues/36887
2557 [36888]: https://github.com/rust-lang/rust/issues/36888
2558 [36889]: https://github.com/rust-lang/rust/issues/36889
2559 [36890]: https://github.com/rust-lang/rust/issues/36890
2560 [36891]: https://github.com/rust-lang/rust/issues/36891
2561 [36892]: https://github.com/rust-lang/rust/issues/36892
2562 [36894]: https://github.com/rust-lang/rust/pull/36894
2563 [36917]: https://github.com/rust-lang/rust/pull/36917
2564 [36993]: https://github.com/rust-lang/rust/pull/36993
2565 [37037]: https://github.com/rust-lang/rust/pull/37037
2566 [37064]: https://github.com/rust-lang/rust/pull/37064
2567 [37094]: https://github.com/rust-lang/rust/pull/37094
2568 [37108]: https://github.com/rust-lang/rust/pull/37108
2569 [37111]: https://github.com/rust-lang/rust/pull/37111
2570 [37161]: https://github.com/rust-lang/rust/pull/37161
2571 [37162]: https://github.com/rust-lang/rust/pull/37162
2572 [37167]: https://github.com/rust-lang/rust/pull/37167
2573 [37178]: https://github.com/rust-lang/rust/pull/37178
2574 [37200]: https://github.com/rust-lang/rust/pull/37200
2575 [37213]: https://github.com/rust-lang/rust/pull/37213
2576 [37221]: https://github.com/rust-lang/rust/pull/37221
2577 [37224]: https://github.com/rust-lang/rust/pull/37224
2578 [37230]: https://github.com/rust-lang/rust/pull/37230
2579 [37231]: https://github.com/rust-lang/rust/pull/37231
2580 [37247]: https://github.com/rust-lang/rust/pull/37247
2581 [37267]: https://github.com/rust-lang/rust/pull/37267
2582 [37270]: https://github.com/rust-lang/rust/pull/37270
2583 [37273]: https://github.com/rust-lang/rust/pull/37273
2584 [37280]: https://github.com/rust-lang/rust/pull/37280
2585 [37298]: https://github.com/rust-lang/rust/pull/37298
2586 [37306]: https://github.com/rust-lang/rust/pull/37306
2587 [37310]: https://github.com/rust-lang/rust/pull/37310
2588 [37312]: https://github.com/rust-lang/rust/pull/37312
2589 [37313]: https://github.com/rust-lang/rust/pull/37313
2590 [37315]: https://github.com/rust-lang/rust/pull/37315
2591 [37318]: https://github.com/rust-lang/rust/pull/37318
2592 [37322]: https://github.com/rust-lang/rust/pull/37322
2593 [37326]: https://github.com/rust-lang/rust/pull/37326
2594 [37351]: https://github.com/rust-lang/rust/pull/37351
2595 [37356]: https://github.com/rust-lang/rust/pull/37356
2596 [37367]: https://github.com/rust-lang/rust/pull/37367
2597 [37373]: https://github.com/rust-lang/rust/pull/37373
2598 [37378]: https://github.com/rust-lang/rust/pull/37378
2599 [37389]: https://github.com/rust-lang/rust/pull/37389
2600 [37392]: https://github.com/rust-lang/rust/pull/37392
2601 [37427]: https://github.com/rust-lang/rust/pull/37427
2602 [37439]: https://github.com/rust-lang/rust/pull/37439
2603 [37445]: https://github.com/rust-lang/rust/pull/37445
2604 [37470]: https://github.com/rust-lang/rust/pull/37470
2605 [37569]: https://github.com/rust-lang/rust/pull/37569
2606 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2607 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
2608 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
2609 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
2610 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
2611 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
2612 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
2615 Version 1.13.0 (2016-11-10)
2616 ===========================
2621 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
2622 errors, like the `try!` macro, described in [RFC 0243].
2623 * [Stabilize macros in type position][36014]. Described in [RFC 873].
2624 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
2625 * [Fix `#[derive]` for empty tuple structs/variants][35728]
2626 * [Fix lifetime rules for 'if' conditions][36029]
2627 * [Avoid loading and parsing unconfigured non-inline modules][36482]
2632 * [Add the `-C link-arg` argument][36574]
2633 * [Remove the old AST-based backend from rustc_trans][35764]
2634 * [Don't enable NEON by default on armv7 Linux][35814]
2635 * [Fix debug line number info for macro expansions][35238]
2636 * [Do not emit "class method" debuginfo for types that are not
2637 DICompositeType][36008]
2638 * [Warn about multiple conflicting #[repr] hints][34623]
2639 * [When sizing DST, don't double-count nested struct prefixes][36351]
2640 * [Default RUST_MIN_STACK to 16MiB for now][36505]
2641 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
2642 * [Reject macros with empty repetitions to avoid infinite loop][36721]
2643 * [Expand macros without recursing to avoid stack overflows][36214]
2648 * [Replace macro backtraces with labeled local uses][35702]
2649 * [Improve error message for misplaced doc comments][33922]
2650 * [Buffer unix and lock windows to prevent message interleaving][35975]
2651 * [Update lifetime errors to specifically note temporaries][36171]
2652 * [Special case a few colors for Windows][36178]
2653 * [Suggest `use self` when such an import resolves][36289]
2654 * [Be more specific when type parameter shadows primitive type][36338]
2655 * Many minor improvements
2657 Compile-time Optimizations
2658 --------------------------
2660 * [Compute and cache HIR hashes at beginning][35854]
2661 * [Don't hash types in loan paths][36004]
2662 * [Cache projections in trans][35761]
2663 * [Optimize the parser's last token handling][36527]
2664 * [Only instantiate #[inline] functions in codegen units referencing
2665 them][36524]. This leads to big improvements in cases where crates export
2666 define many inline functions without using them directly.
2667 * [Lazily allocate TypedArena's first chunk][36592]
2668 * [Don't allocate during default HashSet creation][36734]
2675 * [`overflowing_abs`]
2676 * [`RefCell::try_borrow`]
2677 * [`RefCell::try_borrow_mut`]
2682 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
2683 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
2685 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
2686 * [Implement `Debug` for `std::vec::IntoIter`][35707]
2687 * [`CString`: avoid excessive growth just to 0-terminate][35871]
2688 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
2689 * [Use arc4rand on FreeBSD][35884]
2690 * [memrchr: Correct aligned offset computation][35969]
2691 * [Improve Demangling of Rust Symbols][36059]
2692 * [Use monotonic time in condition variables][35048]
2693 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
2694 * [Implement conversion traits for `char`][35755]
2695 * [Fix illegal instruction caused by overflow in channel cloning][36104]
2696 * [Zero first byte of CString on drop][36264]
2697 * [Inherit overflow checks for sum and product][36372]
2698 * [Add missing Eq implementations][36423]
2699 * [Implement `Debug` for `DirEntry`][36631]
2700 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
2702 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2703 * [Implement more traits for `std::io::ErrorKind`][35911]
2704 * [Optimize BinaryHeap bounds checking][36072]
2705 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
2706 `extend_with_element`][36355]
2707 * [Fix overflow checking in unsigned pow()][34942]
2712 * This release includes security fixes to both curl and OpenSSL.
2713 * [Fix transitive doctests when panic=abort][cargo/3021]
2714 * [Add --all-features flag to cargo][cargo/3038]
2715 * [Reject path-based dependencies in `cargo package`][cargo/3060]
2716 * [Don't parse the home directory more than once][cargo/3078]
2717 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
2718 * [Update OpenSSL to 1.0.2j][cargo/3121]
2719 * [Add license and license_file to cargo metadata output][cargo/3110]
2720 * [Make crates-io registry URL optional in config; ignore all changes to
2721 source.crates-io][cargo/3089]
2722 * [Don't download dependencies from other platforms][cargo/3123]
2723 * [Build transitive dev-dependencies when needed][cargo/3125]
2724 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
2725 * [Avoid updating registry when adding existing deps][cargo/3144]
2726 * [Warn about path overrides that won't work][cargo/3136]
2727 * [Use workspaces during `cargo install`][cargo/3146]
2728 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
2729 * [Add --message-format flag][cargo/3000]
2730 * [Pass target environment for rustdoc][cargo/3205]
2731 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
2732 * [Update curl and curl-sys][cargo/3241]
2733 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
2738 * [rustdoc: Add the `--sysroot` argument][36586]
2739 * [rustdoc: Fix a couple of issues with the search results][35655]
2740 * [rustdoc: remove the `!` from macro URLs and titles][35234]
2741 * [gdb: Fix pretty-printing special-cased Rust types][35585]
2742 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
2747 * [Remove unmaintained style guide][35124]
2748 * [Add s390x support][36369]
2749 * [Initial work at Haiku OS support][36727]
2750 * [Add mips-uclibc targets][35734]
2751 * [Crate-ify compiler-rt into compiler-builtins][35021]
2752 * [Add rustc version info (git hash + date) to dist tarball][36213]
2753 * Many documentation improvements
2758 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2759 * [Deny (by default) transmuting from fn item types to pointer-sized
2760 types][34923]. Continuing the long transition to zero-sized fn items,
2762 * [Fix `#[derive]` for empty tuple structs/variants][35728].
2764 * [Issue deprecation warnings for safe accesses to extern statics][36173]
2765 * [Fix lifetime rules for 'if' conditions][36029].
2766 * [Inherit overflow checks for sum and product][36372].
2767 * [Forbid user-defined macros named "macro_rules"][36730].
2769 [33922]: https://github.com/rust-lang/rust/pull/33922
2770 [34623]: https://github.com/rust-lang/rust/pull/34623
2771 [34923]: https://github.com/rust-lang/rust/pull/34923
2772 [34942]: https://github.com/rust-lang/rust/pull/34942
2773 [34982]: https://github.com/rust-lang/rust/pull/34982
2774 [35021]: https://github.com/rust-lang/rust/pull/35021
2775 [35048]: https://github.com/rust-lang/rust/pull/35048
2776 [35074]: https://github.com/rust-lang/rust/pull/35074
2777 [35124]: https://github.com/rust-lang/rust/pull/35124
2778 [35234]: https://github.com/rust-lang/rust/pull/35234
2779 [35238]: https://github.com/rust-lang/rust/pull/35238
2780 [35354]: https://github.com/rust-lang/rust/pull/35354
2781 [35559]: https://github.com/rust-lang/rust/pull/35559
2782 [35585]: https://github.com/rust-lang/rust/pull/35585
2783 [35627]: https://github.com/rust-lang/rust/pull/35627
2784 [35655]: https://github.com/rust-lang/rust/pull/35655
2785 [35702]: https://github.com/rust-lang/rust/pull/35702
2786 [35707]: https://github.com/rust-lang/rust/pull/35707
2787 [35728]: https://github.com/rust-lang/rust/pull/35728
2788 [35734]: https://github.com/rust-lang/rust/pull/35734
2789 [35755]: https://github.com/rust-lang/rust/pull/35755
2790 [35761]: https://github.com/rust-lang/rust/pull/35761
2791 [35764]: https://github.com/rust-lang/rust/pull/35764
2792 [35814]: https://github.com/rust-lang/rust/pull/35814
2793 [35854]: https://github.com/rust-lang/rust/pull/35854
2794 [35871]: https://github.com/rust-lang/rust/pull/35871
2795 [35884]: https://github.com/rust-lang/rust/pull/35884
2796 [35911]: https://github.com/rust-lang/rust/pull/35911
2797 [35969]: https://github.com/rust-lang/rust/pull/35969
2798 [35975]: https://github.com/rust-lang/rust/pull/35975
2799 [36004]: https://github.com/rust-lang/rust/pull/36004
2800 [36008]: https://github.com/rust-lang/rust/pull/36008
2801 [36014]: https://github.com/rust-lang/rust/pull/36014
2802 [36029]: https://github.com/rust-lang/rust/pull/36029
2803 [36059]: https://github.com/rust-lang/rust/pull/36059
2804 [36072]: https://github.com/rust-lang/rust/pull/36072
2805 [36101]: https://github.com/rust-lang/rust/pull/36101
2806 [36104]: https://github.com/rust-lang/rust/pull/36104
2807 [36171]: https://github.com/rust-lang/rust/pull/36171
2808 [36173]: https://github.com/rust-lang/rust/pull/36173
2809 [36178]: https://github.com/rust-lang/rust/pull/36178
2810 [36213]: https://github.com/rust-lang/rust/pull/36213
2811 [36214]: https://github.com/rust-lang/rust/pull/36214
2812 [36264]: https://github.com/rust-lang/rust/pull/36264
2813 [36266]: https://github.com/rust-lang/rust/pull/36266
2814 [36289]: https://github.com/rust-lang/rust/pull/36289
2815 [36338]: https://github.com/rust-lang/rust/pull/36338
2816 [36351]: https://github.com/rust-lang/rust/pull/36351
2817 [36355]: https://github.com/rust-lang/rust/pull/36355
2818 [36369]: https://github.com/rust-lang/rust/pull/36369
2819 [36372]: https://github.com/rust-lang/rust/pull/36372
2820 [36423]: https://github.com/rust-lang/rust/pull/36423
2821 [36482]: https://github.com/rust-lang/rust/pull/36482
2822 [36505]: https://github.com/rust-lang/rust/pull/36505
2823 [36524]: https://github.com/rust-lang/rust/pull/36524
2824 [36527]: https://github.com/rust-lang/rust/pull/36527
2825 [36551]: https://github.com/rust-lang/rust/pull/36551
2826 [36574]: https://github.com/rust-lang/rust/pull/36574
2827 [36586]: https://github.com/rust-lang/rust/pull/36586
2828 [36592]: https://github.com/rust-lang/rust/pull/36592
2829 [36631]: https://github.com/rust-lang/rust/pull/36631
2830 [36639]: https://github.com/rust-lang/rust/pull/36639
2831 [36721]: https://github.com/rust-lang/rust/pull/36721
2832 [36727]: https://github.com/rust-lang/rust/pull/36727
2833 [36730]: https://github.com/rust-lang/rust/pull/36730
2834 [36734]: https://github.com/rust-lang/rust/pull/36734
2835 [36754]: https://github.com/rust-lang/rust/pull/36754
2836 [36995]: https://github.com/rust-lang/rust/pull/36995
2837 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
2838 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
2839 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2840 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
2841 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
2842 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
2843 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
2844 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
2845 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
2846 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
2847 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
2848 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
2849 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
2850 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
2851 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
2852 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
2853 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
2854 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
2855 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
2856 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
2857 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
2858 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
2859 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
2860 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
2861 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
2862 [rustup]: https://www.rustup.rs
2863 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
2864 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
2865 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
2866 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
2867 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
2868 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
2869 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
2872 Version 1.12.1 (2016-10-20)
2873 ===========================
2878 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
2879 * [Confusion with double negation and booleans][36856]
2880 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
2881 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
2882 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
2883 * [Corrupted memory after updated to 1.12][36936]
2884 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
2885 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
2886 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
2888 [36381]: https://github.com/rust-lang/rust/issues/36381
2889 [36856]: https://github.com/rust-lang/rust/issues/36856
2890 [36875]: https://github.com/rust-lang/rust/issues/36875
2891 [36924]: https://github.com/rust-lang/rust/issues/36924
2892 [36926]: https://github.com/rust-lang/rust/issues/36926
2893 [36936]: https://github.com/rust-lang/rust/issues/36936
2894 [37026]: https://github.com/rust-lang/rust/issues/37026
2895 [37112]: https://github.com/rust-lang/rust/issues/37112
2896 [37153]: https://github.com/rust-lang/rust/issues/37153
2899 Version 1.12.0 (2016-09-29)
2900 ===========================
2905 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2906 This translation pass is far simpler than the previous AST->LLVM pass, and
2907 creates opportunities to perform new optimizations directly on the MIR. It
2908 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2909 * [`rustc` presents a new, more readable error format, along with
2910 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2911 Most common editors supporting Rust have been updated to work with it. It was
2912 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2917 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2918 This translation pass is far simpler than the previous AST->LLVM pass, and
2919 creates opportunities to perform new optimizations directly on the MIR. It
2920 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2921 * [Print the Rust target name, not the LLVM target name, with
2922 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
2923 * [The computation of `TypeId` is correct in some cases where it was previously
2924 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
2925 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
2926 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
2927 `--print relocation-models`, and `--print code-models` print the available
2928 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
2929 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
2930 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
2931 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
2932 These targets produce statically-linked binaries. There are no binary release
2938 * [`rustc` presents a new, more readable error format, along with
2939 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2940 Most common editors supporting Rust have been updated to work with it. It was
2941 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2942 * [In error descriptions, references are now described in plain English,
2943 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
2944 * [In error type descriptions, unknown numeric types are named `{integer}` or
2945 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
2946 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
2951 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
2952 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
2953 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
2954 useful](https://github.com/rust-lang/rust/pull/34908)
2955 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
2956 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
2957 * [Semicolons are properly required as statement delimiters inside
2958 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
2959 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2964 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
2965 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
2966 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
2967 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
2968 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
2969 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
2970 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
2971 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
2972 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
2973 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
2974 Both on Unix and Windows.
2975 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
2976 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
2977 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
2978 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
2979 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
2980 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
2981 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
2982 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
2987 * [The `format!` macro and friends now allow a single argument to be formatted
2988 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
2989 * [The lifetime bounds on `[T]::binary_search_by` and
2990 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
2991 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
2992 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
2993 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
2994 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
2995 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
2996 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
2997 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
2998 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
2999 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
3000 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
3001 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
3002 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
3003 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
3004 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
3005 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
3006 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
3007 * [`mpsc::sync_channel` `Receiver`s return any available message before
3008 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
3009 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
3010 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
3015 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
3016 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
3017 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
3018 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
3019 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
3020 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
3021 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
3022 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
3023 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
3024 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
3025 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
3026 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
3027 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
3028 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
3029 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
3030 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
3035 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
3036 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
3041 * [Test binaries now support a `--test-threads` argument to specify the number
3042 of threads used to run tests, and which acts the same as the
3043 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
3044 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
3045 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
3046 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
3047 * [Rust releases now come with source packages that can be installed by rustup
3048 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
3049 The resulting source code can be used by tools and IDES, located in the
3050 sysroot under `lib/rustlib/src`.
3055 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
3056 * Many minor improvements to the documentation.
3057 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
3062 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
3063 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
3064 * [When formatting strings, if "precision" is specified, the "fill",
3065 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
3066 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
3069 Version 1.11.0 (2016-08-18)
3070 ===========================
3075 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
3076 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
3077 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
3078 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
3079 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
3084 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
3085 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
3086 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
3087 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
3088 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
3089 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
3090 (in libcore - previously stabilized in libstd)
3091 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
3092 (in libcore - previously stabilized in libstd)
3093 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
3094 (in libcore - previously stabilized in libstd)
3095 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
3096 (in libcore - previously stabilized in libstd)
3097 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3098 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3099 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
3100 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
3105 * [The `thread_local!` macro supports multiple definitions in a single
3106 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
3107 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
3108 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
3109 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
3110 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
3111 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
3112 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
3113 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
3118 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
3119 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
3120 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
3121 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
3122 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
3123 and `-vv` prints warnings for all crates.
3124 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
3125 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
3126 This provides room for expansion by arbitrary tools.
3127 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
3128 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
3129 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
3130 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
3131 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
3132 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
3133 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
3138 * [Caching projections speeds up type check dramatically for some
3139 workloads](https://github.com/rust-lang/rust/pull/33816)
3140 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
3141 This hasher is faster, but is believed to provide sufficient
3142 protection from collision attacks.
3143 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
3148 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
3149 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
3150 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
3151 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
3152 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
3157 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
3158 * [When emitting debug info, rustc emits frame pointers for closures,
3159 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
3160 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
3161 * Many more errors have been given error codes and extended
3163 * API documentation continues to be improved, with many new examples
3168 * [rustc no longer hangs when dependencies recursively re-export
3169 submodules](https://github.com/rust-lang/rust/pull/34542)
3170 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
3171 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
3172 rewritten](https://github.com/rust-lang/rust/pull/33895)
3173 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
3174 No targets use this yet, but it works toward AVR support.
3179 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
3180 * [The new follow-set rules that place restrictions on `macro_rules!`
3181 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
3182 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
3183 and has been a warning since 1.10.
3184 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
3185 This causes breakage in some corner cases.
3188 Version 1.10.0 (2016-07-07)
3189 ===========================
3194 * [Allow `concat_idents!` in type positions as well as in expression
3195 positions](https://github.com/rust-lang/rust/pull/33735).
3196 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
3197 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
3198 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
3199 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
3200 * [`panic!` can be converted to a runtime abort with the
3201 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
3202 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3203 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
3204 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
3205 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-cdylib.md).
3206 Note that Cargo does not yet directly support cdylibs.
3211 * `os::windows::fs::OpenOptionsExt::access_mode`
3212 * `os::windows::fs::OpenOptionsExt::share_mode`
3213 * `os::windows::fs::OpenOptionsExt::custom_flags`
3214 * `os::windows::fs::OpenOptionsExt::attributes`
3215 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
3216 * `os::unix::fs::OpenOptionsExt::custom_flags`
3217 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
3218 * `Default for sync::Weak`
3219 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
3220 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
3221 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
3222 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
3223 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
3224 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
3225 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
3226 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
3227 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
3228 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
3229 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
3230 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
3231 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
3232 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
3233 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
3234 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
3235 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
3236 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
3237 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
3238 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
3239 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
3240 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
3241 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
3242 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
3243 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
3244 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
3245 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
3246 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
3247 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
3248 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
3249 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
3250 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
3251 * Read/Write/RawFd impls for `UnixStream`
3252 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
3253 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
3254 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
3255 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
3256 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
3257 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
3258 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
3259 * RawFd impls for `UnixListener`
3260 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
3261 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
3262 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
3263 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
3264 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
3265 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
3266 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
3267 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
3268 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
3269 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
3270 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
3271 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
3272 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
3273 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
3274 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
3275 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
3276 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
3277 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
3278 * RawFd impls for `UnixDatagram`
3279 * `{BTree,Hash}Map::values_mut`
3280 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/std/primitive.slice.html#method.binary_search_by_key)
3285 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
3286 The semantics of this minor method are subtle and probably not what
3288 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
3289 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
3290 will fall back to `/dev/urandom` temporarily to avoid blocking
3291 during early boot](https://github.com/rust-lang/rust/pull/33086).
3292 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
3293 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
3294 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
3295 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
3296 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
3297 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
3298 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
3302 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
3303 This controls the runtime behavior of the `panic!` macro
3304 and can be either "unwind" (the default), or "abort".
3305 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3306 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
3307 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
3308 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
3309 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
3310 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
3311 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
3312 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
3313 By default they are retried twice, which can be customized with the
3314 `net.retry` value in `.cargo/config`.
3315 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
3316 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
3317 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
3318 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
3319 Makes it possible to install multiple crates in parallel.
3320 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
3321 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
3322 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
3323 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
3324 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
3325 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
3330 * [rustc memory usage was reduced by refactoring the context used for
3331 type checking](https://github.com/rust-lang/rust/pull/33425).
3332 * [Speed up creation of `HashMap`s by caching the random keys used
3333 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
3334 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
3335 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
3336 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
3337 10x faster than the previous lookup tables.
3338 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
3343 * Many incremental improvements to documentation and rustdoc.
3344 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
3345 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
3346 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
3347 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
3348 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
3349 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
3350 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
3355 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
3356 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
3357 * [`std` no longer prints backtraces on platforms where the running
3358 module must be loaded with `env::current_exe`, which can't be relied
3359 on](https://github.com/rust-lang/rust/pull/33554).
3360 * This release includes std binaries for the i586-unknown-linux-gnu,
3361 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
3362 i586 target is for old x86 hardware without SSE2, and the armv7
3363 target is for Android running on modern ARM architectures.
3364 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
3365 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
3366 * [On Unix the runtime aborts by calling `libc::abort` instead of
3367 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
3368 * [Rust is now bootstrapped from the previous release of Rust,
3369 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
3374 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
3375 * [`target_env` for Linux ARM targets is just `gnu`, not
3376 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
3377 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
3378 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
3379 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
3380 Affects how macros are parsed.
3381 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
3382 * [Feature-gated attributes on macro-generated macro invocations are
3383 now rejected](https://github.com/rust-lang/rust/pull/32791).
3384 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
3385 This caused some minor changes to type inference.
3388 Version 1.9.0 (2016-05-26)
3389 ==========================
3394 * The `#[deprecated]` attribute when applied to an API will generate
3395 warnings when used. The warnings may be suppressed with
3396 `#[allow(deprecated)]`. [RFC 1270].
3397 * [`fn` item types are zero sized, and each `fn` names a unique
3398 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3399 `transmute` on a `fn` type will generate a warning for a few cycles,
3400 then will be converted to an error.
3401 * [Field and method resolution understand visibility, so private
3402 fields and methods cannot prevent the proper use of public fields
3403 and methods][1.9fv].
3404 * [The parser considers unicode codepoints in the
3405 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
3411 * [`std::panic::catch_unwind`][] (renamed from `recover`)
3412 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
3413 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
3414 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
3415 * [`str::is_char_boundary`]
3416 * [`<*const T>::as_ref`]
3417 * [`<*mut T>::as_ref`]
3418 * [`<*mut T>::as_mut`]
3419 * [`AsciiExt::make_ascii_uppercase`]
3420 * [`AsciiExt::make_ascii_lowercase`]
3421 * [`char::decode_utf16`]
3422 * [`char::DecodeUtf16`]
3423 * [`char::DecodeUtf16Error`]
3424 * [`char::DecodeUtf16Error::unpaired_surrogate`]
3425 * [`BTreeSet::take`]
3426 * [`BTreeSet::replace`]
3429 * [`HashSet::replace`]
3431 * [`OsString::with_capacity`]
3432 * [`OsString::clear`]
3433 * [`OsString::capacity`]
3434 * [`OsString::reserve`]
3435 * [`OsString::reserve_exact`]
3436 * [`OsStr::is_empty`]
3438 * [`std::os::unix::thread`]
3441 * [`JoinHandleExt::as_pthread_t`]
3442 * [`JoinHandleExt::into_pthread_t`]
3443 * [`HashSet::hasher`]
3444 * [`HashMap::hasher`]
3445 * [`CommandExt::exec`]
3446 * [`File::try_clone`]
3447 * [`SocketAddr::set_ip`]
3448 * [`SocketAddr::set_port`]
3449 * [`SocketAddrV4::set_ip`]
3450 * [`SocketAddrV4::set_port`]
3451 * [`SocketAddrV6::set_ip`]
3452 * [`SocketAddrV6::set_port`]
3453 * [`SocketAddrV6::set_flowinfo`]
3454 * [`SocketAddrV6::set_scope_id`]
3455 * [`slice::copy_from_slice`]
3456 * [`ptr::read_volatile`]
3457 * [`ptr::write_volatile`]
3458 * [`OpenOptions::create_new`]
3459 * [`TcpStream::set_nodelay`]
3460 * [`TcpStream::nodelay`]
3461 * [`TcpStream::set_ttl`]
3462 * [`TcpStream::ttl`]
3463 * [`TcpStream::set_only_v6`]
3464 * [`TcpStream::only_v6`]
3465 * [`TcpStream::take_error`]
3466 * [`TcpStream::set_nonblocking`]
3467 * [`TcpListener::set_ttl`]
3468 * [`TcpListener::ttl`]
3469 * [`TcpListener::set_only_v6`]
3470 * [`TcpListener::only_v6`]
3471 * [`TcpListener::take_error`]
3472 * [`TcpListener::set_nonblocking`]
3473 * [`UdpSocket::set_broadcast`]
3474 * [`UdpSocket::broadcast`]
3475 * [`UdpSocket::set_multicast_loop_v4`]
3476 * [`UdpSocket::multicast_loop_v4`]
3477 * [`UdpSocket::set_multicast_ttl_v4`]
3478 * [`UdpSocket::multicast_ttl_v4`]
3479 * [`UdpSocket::set_multicast_loop_v6`]
3480 * [`UdpSocket::multicast_loop_v6`]
3481 * [`UdpSocket::set_multicast_ttl_v6`]
3482 * [`UdpSocket::multicast_ttl_v6`]
3483 * [`UdpSocket::set_ttl`]
3484 * [`UdpSocket::ttl`]
3485 * [`UdpSocket::set_only_v6`]
3486 * [`UdpSocket::only_v6`]
3487 * [`UdpSocket::join_multicast_v4`]
3488 * [`UdpSocket::join_multicast_v6`]
3489 * [`UdpSocket::leave_multicast_v4`]
3490 * [`UdpSocket::leave_multicast_v6`]
3491 * [`UdpSocket::take_error`]
3492 * [`UdpSocket::connect`]
3493 * [`UdpSocket::send`]
3494 * [`UdpSocket::recv`]
3495 * [`UdpSocket::set_nonblocking`]
3500 * [`std::sync::Once` is poisoned if its initialization function
3502 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
3503 * [Most types implement `fmt::Debug`][1.9db].
3504 * [The default buffer size used by `BufReader` and `BufWriter` was
3505 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
3506 used by other languages.
3507 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
3508 `Duration` additionally implements `*=` and `/=`][1.9ta].
3509 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
3510 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
3511 * [`Chain` implements `BufRead`][1.9ch].
3512 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
3517 * [Cargo can now run concurrently][1.9cc].
3518 * [Top-level overrides allow specific revisions of crates to be
3519 overridden through the entire crate graph][1.9ct]. This is intended
3520 to make upgrades easier for large projects, by allowing crates to be
3521 forked temporarily until they've been upgraded and republished.
3522 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
3523 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
3524 on the commandline][1.9cf]. `rustc` arguments can also be specified
3525 in the `build.rustflags` configuration key.
3530 * [The time complexity of comparing variables for equivalence during type
3531 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
3532 to major compilation time improvement in some scenarios.
3533 * [`ToString` is specialized for `str`, giving it the same performance
3534 as `to_owned`][1.9ts].
3535 * [Spawning processes with `Command::output` no longer creates extra
3537 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
3538 for C-like enums][1.9cl].
3543 * [Passing the `--quiet` flag to a test runner will produce
3544 much-abbreviated output][1.9q].
3545 * The Rust Project now publishes std binaries for the
3546 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
3547 `i586-pc-windows-msvc` targets.
3552 * [`std::sync::Once` is poisoned if its initialization function
3554 * [It is illegal to define methods with the same name in overlapping
3555 inherent `impl` blocks][1.9sn].
3556 * [`fn` item types are zero sized, and each `fn` names a unique
3557 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3558 `transmute` on a `fn` type will generate a warning for a few cycles,
3559 then will be converted to an error.
3560 * [Improvements to const evaluation may trigger new errors when integer
3561 literals are out of range][1.9ce].
3564 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
3565 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
3566 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
3567 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
3568 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
3569 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
3570 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
3571 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
3572 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
3573 [1.9db]: https://github.com/rust-lang/rust/pull/32054
3574 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
3575 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
3576 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
3577 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
3578 [1.9o]: https://github.com/rust-lang/rust/pull/32325
3579 [1.9q]: https://github.com/rust-lang/rust/pull/31887
3580 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
3581 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
3582 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
3583 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
3584 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
3585 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
3586 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
3587 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
3588 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3589 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
3590 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3591 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
3592 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
3593 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
3594 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
3595 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
3596 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
3597 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
3598 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
3599 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
3600 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
3601 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
3602 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
3603 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
3604 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
3605 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
3606 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
3607 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
3608 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
3609 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
3610 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
3611 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
3612 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
3613 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
3614 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
3615 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
3616 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
3617 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
3618 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
3619 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
3620 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
3621 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
3622 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
3623 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
3624 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3625 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3626 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3627 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3628 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3629 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3630 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
3631 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3632 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
3633 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3634 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3635 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3636 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3637 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3638 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
3639 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
3640 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
3641 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
3642 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
3643 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
3644 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
3645 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
3646 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
3647 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
3648 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
3649 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
3650 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
3651 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
3652 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
3653 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
3654 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
3655 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
3656 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
3657 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
3658 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
3659 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
3660 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
3661 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
3662 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
3663 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
3664 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
3665 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
3666 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
3667 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
3668 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
3669 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
3670 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
3671 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
3672 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
3673 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
3676 Version 1.8.0 (2016-04-14)
3677 ==========================
3682 * Rust supports overloading of compound assignment statements like
3683 `+=` by implementing the [`AddAssign`], [`SubAssign`],
3684 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
3685 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
3687 * Empty structs can be defined with braces, as in `struct Foo { }`, in
3688 addition to the non-braced form, `struct Foo;`. [RFC 218].
3694 * [`str::encode_utf16`][] (renamed from `utf16_units`)
3695 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
3698 * [`ptr::drop_in_place`]
3700 * [`time::SystemTime`]
3702 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
3703 * [`Instant::elapsed`]
3704 * [`SystemTime::now`]
3705 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
3706 * [`SystemTime::elapsed`]
3707 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
3708 * [`SystemTimeError`]
3709 * [`SystemTimeError::duration`]
3710 * Various impls for `SystemTimeError`
3712 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
3713 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
3714 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
3715 * [The `write!` and `writeln!` macros correctly emit errors if any of
3716 their arguments can't be formatted][1.8w].
3717 * [Various I/O functions support large files on 32-bit Linux][1.8l].
3718 * [The Unix-specific `raw` modules, which contain a number of
3719 redefined C types are deprecated][1.8r], including `os::raw::unix`,
3720 `os::raw::macos`, and `os::raw::linux`. These modules defined types
3721 such as `ino_t` and `dev_t`. The inconsistency of these definitions
3722 across platforms was making it difficult to implement `std`
3723 correctly. Those that need these definitions should use the `libc`
3725 * The Unix-specific `MetadataExt` traits, including
3726 `os::unix::fs::MetadataExt`, which expose values such as inode
3727 numbers [no longer return platform-specific types][1.8r], but
3728 instead return widened integers. [RFC 1415].
3729 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
3730 * [Atomic loads and stores are not volatile][1.8a].
3731 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
3736 * [Inlining hash functions lead to a 3% compile-time improvement in
3737 some workloads][1.8h].
3738 * When using jemalloc, its symbols are [unprefixed so that it
3739 overrides the libc malloc implementation][1.8h]. This means that for
3740 rustc, LLVM is now using jemalloc, which results in a 6%
3741 compile-time improvement on a specific workload.
3742 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
3747 * [32-bit MSVC builds finally implement unwinding][1.8ms].
3748 i686-pc-windows-msvc is now considered a tier-1 platform.
3749 * [The `--print targets` flag prints a list of supported targets][1.8t].
3750 * [The `--print cfg` flag prints the `cfg`s defined for the current
3752 * [`rustc` can be built with an new Cargo-based build system, written
3753 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
3754 build system. To enable it configure with `configure --rustbuild`.
3755 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
3756 variants while also indicating the total number of missing variants
3757 if more than 3][1.8m].
3758 * [Executable stacks are disabled on Linux and BSD][1.8nx].
3759 * The Rust Project now publishes binary releases of the standard
3760 library for a number of tier-2 targets:
3761 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
3762 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
3763 `x86_64-rumprun-netbsd`. These can be installed with
3764 tools such as [multirust][1.8mr].
3769 * [`cargo init` creates a new Cargo project in the current
3770 directory][1.8ci]. It is otherwise like `cargo new`.
3771 * [Cargo has configuration keys for `-v` and
3772 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
3773 `[term]` section of `.cargo/config`.
3774 * [Configuration keys that evaluate to strings or integers can be set
3775 via environment variables][1.8ce]. For example the `build.jobs` key
3776 can be set via `CARGO_BUILD_JOBS`. Environment variables take
3777 precedence over config files.
3778 * [Target-specific dependencies support Rust `cfg` syntax for
3779 describing targets][1.8cfg] so that dependencies for multiple
3780 targets can be specified together. [RFC 1361].
3781 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
3782 `RUSTDOC` take precedence over the `build.target-dir`,
3783 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
3784 * [The child process tree is killed on Windows when Cargo is
3786 * [The `build.target` configuration value sets the target platform,
3787 like `--target`][1.8ct].
3792 * [Unstable compiler flags have been further restricted][1.8u]. Since
3793 1.0 `-Z` flags have been considered unstable, and other flags that
3794 were considered unstable additionally required passing `-Z
3795 unstable-options` to access. Unlike unstable language and library
3796 features though, these options have been accessible on the stable
3797 release channel. Going forward, *new unstable flags will not be
3798 available on the stable release channel*, and old unstable flags
3799 will warn about their usage. In the future, all unstable flags will
3800 be unavailable on the stable release channel.
3801 * [It is no longer possible to `match` on empty enum variants using
3802 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
3803 * The Unix-specific `MetadataExt` traits, including
3804 `os::unix::fs::MetadataExt`, which expose values such as inode
3805 numbers [no longer return platform-specific types][1.8r], but
3806 instead return widened integers. [RFC 1415].
3807 * [Modules sourced from the filesystem cannot appear within arbitrary
3808 blocks, but only within other modules][1.8mf].
3809 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
3810 * On Unix, [stack overflow triggers a runtime abort instead of a
3812 * [`Command::spawn` and its equivalents return an error if any of
3813 its command-line arguments contain interior `NUL`s][1.8n].
3814 * [Tuple and unit enum variants from other crates are in the type
3816 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
3817 type instead of `.a` files][1.8st]. Additionally, for the MSVC
3818 toolchain, `rustc` emits import libraries named `foo.dll.lib`
3819 instead of `foo.lib`.
3822 [1.8a]: https://github.com/rust-lang/rust/pull/30962
3823 [1.8b]: https://github.com/rust-lang/rust/pull/31123
3824 [1.8c]: https://github.com/rust-lang/rust/pull/31530
3825 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
3826 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
3827 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
3828 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
3829 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
3830 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
3831 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
3832 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
3833 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
3834 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
3835 [1.8h]: https://github.com/rust-lang/rust/pull/31460
3836 [1.8l]: https://github.com/rust-lang/rust/pull/31668
3837 [1.8m]: https://github.com/rust-lang/rust/pull/31020
3838 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
3839 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
3840 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
3841 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
3842 [1.8n]: https://github.com/rust-lang/rust/pull/31056
3843 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
3844 [1.8r]: https://github.com/rust-lang/rust/pull/31551
3845 [1.8so]: https://github.com/rust-lang/rust/pull/31333
3846 [1.8st]: https://github.com/rust-lang/rust/pull/29520
3847 [1.8t]: https://github.com/rust-lang/rust/pull/31358
3848 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
3849 [1.8u]: https://github.com/rust-lang/rust/pull/31793
3850 [1.8v]: https://github.com/rust-lang/rust/pull/31757
3851 [1.8w]: https://github.com/rust-lang/rust/pull/31904
3852 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
3853 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
3854 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
3855 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
3856 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
3857 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
3858 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
3859 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
3860 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
3861 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
3862 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
3863 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
3864 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
3865 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
3866 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
3867 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
3868 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
3869 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
3870 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
3871 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
3872 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
3873 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
3874 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
3875 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
3876 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
3877 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
3878 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
3879 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
3880 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
3881 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
3884 Version 1.7.0 (2016-03-03)
3885 ==========================
3892 * [`Path::strip_prefix`][] (renamed from relative_from)
3893 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
3895 * [`Ipv4Addr::is_loopback`]
3896 * [`Ipv4Addr::is_private`]
3897 * [`Ipv4Addr::is_link_local`]
3898 * [`Ipv4Addr::is_multicast`]
3899 * [`Ipv4Addr::is_broadcast`]
3900 * [`Ipv4Addr::is_documentation`]
3902 * [`Ipv6Addr::is_unspecified`]
3903 * [`Ipv6Addr::is_loopback`]
3904 * [`Ipv6Addr::is_multicast`]
3907 * [`Vec::as_mut_slice`]
3909 * [`String::as_str`]
3910 * [`String::as_mut_str`]
3912 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
3914 * `<[T]>::`[`sort_by_key`]
3915 * checked, saturated, and overflowing operations
3916 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
3917 * [`i32::saturating_mul`]
3918 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
3919 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
3920 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
3921 * [`u32::saturating_mul`]
3922 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
3923 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
3924 * and checked, saturated, and overflowing operations for other primitive types
3926 * [`ffi::IntoStringError`]
3927 * [`CString::into_string`]
3928 * [`CString::into_bytes`]
3929 * [`CString::into_bytes_with_nul`]
3930 * `From<CString> for Vec<u8>`
3932 * [`IntoStringError::into_cstring`]
3933 * [`IntoStringError::utf8_error`]
3934 * `Error for IntoStringError`
3936 * [`std::hash::BuildHasher`]
3937 * [`BuildHasher::Hasher`]
3938 * [`BuildHasher::build_hasher`]
3939 * [`std::hash::BuildHasherDefault`]
3940 * [`HashMap::with_hasher`]
3941 * [`HashMap::with_capacity_and_hasher`]
3942 * [`HashSet::with_hasher`]
3943 * [`HashSet::with_capacity_and_hasher`]
3944 * [`std::collections::hash_map::RandomState`]
3945 * [`RandomState::new`]
3946 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
3947 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
3948 from bytes is faster.
3949 * [The performance of `LineWriter` (and thus `io::stdout`) was
3950 improved by using `memchr` to search for newlines][1.7m].
3951 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
3952 `f64` variants were stabilized previously.
3953 * [`BTreeMap` was rewritten to use less memory and improve the performance
3954 of insertion and iteration, the latter by as much as 5x][1.7bm].
3955 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
3956 covariant over their contained type][1.7bt].
3957 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
3958 over their contained type][1.7ll].
3959 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
3961 * [`Any` is implemented for unsized types][1.7a].
3962 * [`Hash` is implemented for `Duration`][1.7h].
3967 * [When running tests with `--test`, rustdoc will pass `--cfg`
3968 arguments to the compiler][1.7dt].
3969 * [The compiler is built with RPATH information by default][1.7rpa].
3970 This means that it will be possible to run `rustc` when installed in
3971 unusual configurations without configuring the dynamic linker search
3973 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
3974 any RPATH entries (emitted with `-C rpath`) *not* take precedence
3975 over `LD_LIBRARY_PATH`.
3980 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
3981 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
3982 * [The `rerun-if-changed` build script directive no longer causes the
3983 build script to incorrectly run twice in certain scenarios][1.7rr].
3988 * Soundness fixes to the interactions between associated types and
3989 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
3990 code that violates the new rules. This is a significant change that
3991 is known to break existing code, so it has emitted warnings for the
3992 new error cases since 1.4 to give crate authors time to adapt. The
3993 details of what is changing are subtle; read the RFC for more.
3994 * [Several bugs in the compiler's visibility calculations were
3995 fixed][1.7v]. Since this was found to break significant amounts of
3996 code, the new errors will be emitted as warnings for several release
3997 cycles, under the `private_in_public` lint.
3998 * Defaulted type parameters were accidentally accepted in positions
3999 that were not intended. In this release, [defaulted type parameters
4000 appearing outside of type definitions will generate a
4001 warning][1.7d], which will become an error in future releases.
4002 * [Parsing "." as a float results in an error instead of 0][1.7p].
4003 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
4004 * [Borrows of closure parameters may not outlive the closure][1.7bc].
4006 [1.7a]: https://github.com/rust-lang/rust/pull/30928
4007 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
4008 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
4009 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
4010 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
4011 [1.7d]: https://github.com/rust-lang/rust/pull/30724
4012 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
4013 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
4014 [1.7f]: https://github.com/rust-lang/rust/pull/30672
4015 [1.7h]: https://github.com/rust-lang/rust/pull/30818
4016 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
4017 [1.7m]: https://github.com/rust-lang/rust/pull/30381
4018 [1.7p]: https://github.com/rust-lang/rust/pull/30681
4019 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
4020 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
4021 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
4022 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
4023 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
4024 [1.7v]: https://github.com/rust-lang/rust/pull/29973
4025 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4026 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4027 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
4028 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
4029 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
4030 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
4031 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
4032 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
4033 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
4034 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
4035 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
4036 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
4037 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
4038 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
4039 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
4040 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
4041 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
4042 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
4043 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
4044 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
4045 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
4046 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
4047 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
4048 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
4049 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
4050 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
4051 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
4052 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
4053 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
4054 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
4055 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
4056 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
4057 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
4058 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
4059 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
4060 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
4061 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
4062 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
4063 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
4064 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
4065 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
4066 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
4067 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
4068 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
4069 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
4070 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
4071 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
4072 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
4073 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
4074 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
4075 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
4076 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
4077 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
4078 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
4079 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
4080 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
4081 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
4082 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
4083 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
4084 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
4087 Version 1.6.0 (2016-01-21)
4088 ==========================
4093 * The `#![no_std]` attribute causes a crate to not be linked to the
4094 standard library, but only the [core library][1.6co], as described
4095 in [RFC 1184]. The core library defines common types and traits but
4096 has no platform dependencies whatsoever, and is the basis for Rust
4097 software in environments that cannot support a full port of the
4098 standard library, such as operating systems. Most of the core
4099 library is now stable.
4105 [`Read::read_exact`],
4106 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
4107 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
4108 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
4109 [`os::unix::fs::DirBuilderExt`],
4110 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
4111 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
4112 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
4113 [`collections::hash_map::Drain`],
4114 [`collections::hash_map::HashMap::drain`],
4115 [`collections::hash_set::Drain`],
4116 [`collections::hash_set::HashSet::drain`],
4117 [`collections::binary_heap::Drain`],
4118 [`collections::binary_heap::BinaryHeap::drain`],
4119 [`Vec::extend_from_slice`][] (renamed from `push_all`),
4120 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
4121 [`RwLock::into_inner`],
4122 [`Iterator::min_by_key`][] (renamed from `min_by`),
4123 [`Iterator::max_by_key`][] (renamed from `max_by`).
4124 * The [core library][1.6co] is stable, as are most of its APIs.
4125 * [The `assert_eq!` macro supports arguments that don't implement
4126 `Sized`][1.6ae], such as arrays. In this way it behaves more like
4128 * Several timer functions that take duration in milliseconds [are
4129 deprecated in favor of those that take `Duration`][1.6ms]. These
4130 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
4131 `thread::park_timeout_ms`.
4132 * The algorithm by which `Vec` reserves additional elements was
4133 [tweaked to not allocate excessive space][1.6a] while still growing
4135 * `From` conversions are [implemented from integers to floats][1.6f]
4136 in cases where the conversion is lossless. Thus they are not
4137 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
4138 or `f64`. They are also not implemented for `isize` and `usize`
4139 because the implementations would be platform-specific. `From` is
4140 also implemented from `f32` to `f64`.
4141 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
4142 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
4143 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
4144 * [`BinaryHeap` was refactored][1.6bh] for modest performance
4146 * Sorting slices that are already sorted [is 50% faster in some
4152 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
4153 * Cargo build scripts can specify their dependencies by emitting the
4154 [`rerun-if-changed`][1.6rr] key.
4155 * crates.io will reject publication of crates with dependencies that
4156 have a wildcard version constraint. Crates with wildcard
4157 dependencies were seen to cause a variety of problems, as described
4158 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
4160 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
4161 release folder. A variety of artifacts that Cargo failed to clean
4162 are now correctly deleted.
4167 * The `unreachable_code` lint [warns when a function call's argument
4169 * The parser indicates [failures that may be caused by
4170 confusingly-similar Unicode characters][1.6uc]
4171 * Certain macro errors [are reported at definition time][1.6m], not
4177 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
4178 environment variable when locating crates. This was a pre-cargo
4179 feature for integrating with the package manager that was
4180 accidentally never removed.
4181 * [A number of bugs were fixed in the privacy checker][1.6p] that
4182 could cause previously-accepted code to break.
4183 * [Modules and unit/tuple structs may not share the same name][1.6ts].
4184 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
4185 struct pattern syntax (`Foo(..)`) can no longer be used to match
4186 unit structs. This is a warning now, but will become an error in
4187 future releases. Patterns that share the same name as a const are
4189 * A bug was fixed that causes [rustc not to apply default type
4190 parameters][1.6xc] when resolving certain method implementations of
4191 traits defined in other crates.
4193 [1.6a]: https://github.com/rust-lang/rust/pull/29454
4194 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
4195 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
4196 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
4197 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
4198 [1.6co]: http://doc.rust-lang.org/core/index.html
4199 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
4200 [1.6f]: https://github.com/rust-lang/rust/pull/29129
4201 [1.6m]: https://github.com/rust-lang/rust/pull/29828
4202 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
4203 [1.6p]: https://github.com/rust-lang/rust/pull/29726
4204 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
4205 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
4206 [1.6s]: https://github.com/rust-lang/rust/pull/29675
4207 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
4208 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
4209 [1.6us]: https://github.com/rust-lang/rust/pull/29383
4210 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
4211 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
4212 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4213 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
4214 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
4215 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
4216 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
4217 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
4218 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
4219 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
4220 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
4221 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
4222 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
4223 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
4224 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
4225 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
4226 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
4227 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
4228 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
4229 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
4230 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
4231 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
4232 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
4233 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
4234 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
4235 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
4236 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
4237 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
4238 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
4239 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
4242 Version 1.5.0 (2015-12-10)
4243 ==========================
4245 * ~700 changes, numerous bugfixes
4251 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
4252 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
4253 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
4254 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
4255 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
4256 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
4257 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
4258 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
4259 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
4260 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
4261 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
4262 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
4263 [`Path::read_link`], [`Path::symlink_metadata`],
4264 [`Utf8Error::valid_up_to`], [`Vec::resize`],
4265 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
4266 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
4267 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
4268 [`slice::split_first_mut`], [`slice::split_first`],
4269 [`slice::split_last_mut`], [`slice::split_last`],
4270 [`char::from_u32_unchecked`], [`fs::canonicalize`],
4271 [`str::MatchIndices`], [`str::RMatchIndices`],
4272 [`str::match_indices`], [`str::rmatch_indices`],
4273 [`str::slice_mut_unchecked`], [`string::ParseError`].
4274 * Rust applications hosted on crates.io can be installed locally to
4275 `~/.cargo/bin` with the [`cargo install`] command. Among other
4276 things this makes it easier to augment Cargo with new subcommands:
4277 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
4278 invoked as `cargo foo`.
4279 * Crates with wildcard (`*`) dependencies will [emit warnings when
4280 published][1.5w]. In 1.6 it will no longer be possible to publish
4281 crates with wildcard dependencies.
4286 * The rules determining when a particular lifetime must outlive
4287 a particular value (known as '[dropck]') have been [modified
4288 to not rely on parametricity][1.5p].
4289 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
4290 and `Arc`][1.5a]. Because these smart pointer types implement
4291 `Deref`, this causes breakage in cases where the interior type
4292 contains methods of the same name.
4293 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
4294 that they could drop their content. Soundness fix.
4295 * All method invocations are [properly checked][1.5wf1] for
4296 [well-formedness][1.5wf2]. Soundness fix.
4297 * Traits whose supertraits contain `Self` are [not object
4298 safe][1.5o]. Soundness fix.
4299 * Target specifications support a [`no_default_libraries`][1.5nd]
4300 setting that controls whether `-nodefaultlibs` is passed to the
4301 linker, and in turn the `is_like_windows` setting no longer affects
4302 the `-nodefaultlibs` flag.
4303 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
4304 * The `#[inline]` and `#[repr]` attributes [can only appear
4305 in valid locations][1.5at].
4306 * Native libraries linked from the local crate are [passed to
4307 the linker before native libraries from upstream crates][1.5nl].
4308 * Two rarely-used attributes, `#[no_debug]` and
4309 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
4310 * Negation of unsigned integers, which has been a warning for
4311 several releases, [is now behind a feature gate and will
4312 generate errors][1.5nu].
4313 * The parser accidentally accepted visibility modifiers on
4314 enum variants, a bug [which has been fixed][1.5ev].
4315 * [A bug was fixed that allowed `use` statements to import unstable
4321 * When evaluating expressions at compile-time that are not
4322 compile-time constants (const-evaluating expressions in non-const
4323 contexts), incorrect code such as overlong bitshifts and arithmetic
4324 overflow will [generate a warning instead of an error][1.5ce],
4325 delaying the error until runtime. This will allow the
4326 const-evaluator to be expanded in the future backwards-compatibly.
4327 * The `improper_ctypes` lint [no longer warns about using `isize` and
4328 `usize` in FFI][1.5ict].
4333 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
4335 * `Default` is [implemented for mutable slices][1.5d].
4336 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
4337 * There are now `From` conversions [between floating point
4338 types][1.5f] where the conversions are lossless.
4339 * There are now `From` conversions [between integer types][1.5i] where
4340 the conversions are lossless.
4341 * [`fs::Metadata` implements `Clone`][1.5fs].
4342 * The `parse` method [accepts a leading "+" when parsing
4344 * [`AsMut` is implemented for `Vec`][1.5am].
4345 * The `clone_from` implementations for `String` and `BinaryHeap` [have
4346 been optimized][1.5cf] and no longer rely on the default impl.
4347 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
4348 `unsafe extern "C"` function types now [implement `Clone`,
4349 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
4350 `fmt::Debug` for up to 12 arguments][1.5fp].
4351 * [Dropping `Vec`s is much faster in unoptimized builds when the
4352 element types don't implement `Drop`][1.5dv].
4353 * A bug that caused in incorrect behavior when [combining `VecDeque`
4354 with zero-sized types][1.5vdz] was resolved.
4355 * [`PartialOrd` for slices is faster][1.5po].
4360 * [Crate metadata size was reduced by 20%][1.5md].
4361 * [Improvements to code generation reduced the size of libcore by 3.3
4362 MB and rustc's memory usage by 18MB][1.5m].
4363 * [Improvements to deref translation increased performance in
4364 unoptimized builds][1.5dr].
4365 * Various errors in trait resolution [are deduplicated to only be
4366 reported once][1.5te].
4367 * Rust has preliminary [support for rumprun kernels][1.5rr].
4368 * Rust has preliminary [support for NetBSD on amd64][1.5na].
4370 [1.5use]: https://github.com/rust-lang/rust/pull/28364
4371 [1.5po]: https://github.com/rust-lang/rust/pull/28436
4372 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
4373 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
4374 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
4375 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
4376 [1.5md]: https://github.com/rust-lang/rust/pull/28521
4377 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
4378 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
4379 [1.5na]: https://github.com/rust-lang/rust/pull/28543
4380 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
4381 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
4382 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
4383 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
4384 [1.5te]: https://github.com/rust-lang/rust/pull/28645
4385 [1.5at]: https://github.com/rust-lang/rust/pull/28650
4386 [1.5am]: https://github.com/rust-lang/rust/pull/28663
4387 [1.5m]: https://github.com/rust-lang/rust/pull/28778
4388 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
4389 [1.5a]: https://github.com/rust-lang/rust/pull/28811
4390 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
4391 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
4392 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
4393 [1.5i]: https://github.com/rust-lang/rust/pull/28921
4394 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
4395 [1.5f]: https://github.com/rust-lang/rust/pull/29129
4396 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
4397 [1.5s]: https://github.com/rust-lang/rust/pull/29190
4398 [1.5d]: https://github.com/rust-lang/rust/pull/29245
4399 [1.5o]: https://github.com/rust-lang/rust/pull/29259
4400 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
4401 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4402 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
4403 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
4404 [1.5c]: https://github.com/rust-lang/rust/pull/29110
4405 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4406 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
4407 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
4408 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
4409 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
4410 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
4411 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
4412 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
4413 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
4414 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
4415 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
4416 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
4417 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
4418 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
4419 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
4420 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
4421 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
4422 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
4423 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
4424 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
4425 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
4426 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
4427 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
4428 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
4429 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
4430 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
4431 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
4432 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
4433 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
4434 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
4435 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
4436 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
4437 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
4438 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
4439 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
4440 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
4441 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
4442 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
4443 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
4444 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
4445 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
4446 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
4447 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
4448 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
4449 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
4450 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
4451 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
4452 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
4453 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
4454 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
4455 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
4456 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
4457 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
4458 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
4460 Version 1.4.0 (2015-10-29)
4461 ==========================
4463 * ~1200 changes, numerous bugfixes
4468 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
4469 GNU) are now supported and recommended for use.
4474 * [Several changes have been made to fix type soundness and improve
4475 the behavior of associated types][sound]. See [RFC 1214]. Although
4476 we have mostly introduced these changes as warnings this release, to
4477 become errors next release, there are still some scenarios that will
4478 see immediate breakage.
4479 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
4480 line breaks in addition to `\n`][crlf].
4481 * [Loans of `'static` lifetime extend to the end of a function][stat].
4482 * [`str::parse` no longer introduces avoidable rounding error when
4483 parsing floating point numbers. Together with earlier changes to
4484 float formatting/output, "round trips" like f.to_string().parse()
4485 now preserve the value of f exactly. Additionally, leading plus
4486 signs are now accepted][fp3].
4492 * `use` statements that import multiple items [can now rename
4493 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
4494 * [Binops work correctly on fat pointers][binfat].
4495 * `pub extern crate`, which does not behave as expected, [issues a
4496 warning][pec] until a better solution is found.
4501 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
4502 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
4503 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
4504 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
4505 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
4506 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
4507 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
4508 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
4509 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
4510 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
4511 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
4512 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
4513 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
4514 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
4515 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
4516 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
4517 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
4518 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
4520 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
4521 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
4522 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
4523 `f64::from_str_radix`.
4524 * [Reverse-searching strings is faster with the 'two-way'
4526 * [`std::io::copy` allows `?Sized` arguments][cc].
4527 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
4528 [override `count`, `nth` and `last` with an O(1)
4529 implementation][it].
4530 * [`Default` is implemented for arrays up to `[T; 32]`][d].
4531 * [`IntoRawFd` has been added to the Unix-specific prelude,
4532 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
4534 * [`Extend<String>` and `FromIterator<String` are both implemented for
4536 * [`IntoIterator` is implemented for references to `Option` and
4538 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
4539 Copy`][ext] as part of [RFC 839]. This will cause type inference
4540 breakage in rare situations.
4541 * [`BinaryHeap` implements `Debug`][bh2].
4542 * [`Borrow` and `BorrowMut` are implemented for fixed-size
4544 * [`extern fn`s with the "Rust" and "C" ABIs implement common
4545 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
4546 * [String comparison is faster][faststr].
4547 * `&mut T` where `T: std::fmt::Write` [also implements
4548 `std::fmt::Write`][mutw].
4549 * [A stable regression in `VecDeque::push_back` and other
4550 capacity-altering methods that caused panics for zero-sized types
4552 * [Function pointers implement traits for up to 12 parameters][fp2].
4557 * The compiler [no longer uses the 'morestack' feature to prevent
4558 stack overflow][mm]. Instead it uses guard pages and stack
4559 probes (though stack probes are not yet implemented on any platform
4561 * [The compiler matches traits faster when projections are involved][p].
4562 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
4564 * [Cargo now displays useful information about what its doing during
4565 `cargo update`][cu].
4567 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
4568 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
4569 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
4570 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
4571 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
4572 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
4573 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
4574 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
4575 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
4576 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
4577 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
4578 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
4579 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
4580 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
4581 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
4582 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
4583 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
4584 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
4585 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4586 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4587 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4588 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4589 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4590 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4591 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4592 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4593 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
4594 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
4595 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
4596 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
4597 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
4598 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
4599 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
4600 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
4601 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
4602 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
4603 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
4604 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
4605 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
4606 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
4607 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
4608 [bh2]: https://github.com/rust-lang/rust/pull/28156
4609 [binfat]: https://github.com/rust-lang/rust/pull/28270
4610 [bm]: https://github.com/rust-lang/rust/pull/28197
4611 [cc]: https://github.com/rust-lang/rust/pull/27531
4612 [crlf]: https://github.com/rust-lang/rust/pull/28034
4613 [cu]: https://github.com/rust-lang/cargo/pull/1931
4614 [d]: https://github.com/rust-lang/rust/pull/27825
4615 [dep]: https://github.com/rust-lang/rust/pull/28339
4616 [es]: https://github.com/rust-lang/rust/pull/27956
4617 [ext]: https://github.com/rust-lang/rust/pull/28094
4618 [faststr]: https://github.com/rust-lang/rust/pull/28338
4619 [ffi]: https://github.com/rust-lang/rust/pull/28779
4620 [fp]: https://github.com/rust-lang/rust/pull/28268
4621 [fp2]: https://github.com/rust-lang/rust/pull/28560
4622 [fp3]: https://github.com/rust-lang/rust/pull/27307
4623 [i]: https://github.com/rust-lang/rust/pull/27451
4624 [into2]: https://github.com/rust-lang/rust/pull/28039
4625 [it]: https://github.com/rust-lang/rust/pull/27652
4626 [mm]: https://github.com/rust-lang/rust/pull/27338
4627 [mutw]: https://github.com/rust-lang/rust/pull/28368
4628 [sound]: https://github.com/rust-lang/rust/pull/27641
4629 [p]: https://github.com/rust-lang/rust/pull/27866
4630 [pec]: https://github.com/rust-lang/rust/pull/28486
4631 [pr]: https://github.com/rust-lang/rust/pull/27896
4632 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4633 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4634 [s]: https://github.com/rust-lang/rust/pull/27474
4635 [stab]: https://github.com/rust-lang/rust/pull/28339
4636 [stat]: https://github.com/rust-lang/rust/pull/28321
4637 [vd]: https://github.com/rust-lang/rust/pull/28494
4639 Version 1.3.0 (2015-09-17)
4640 ==============================
4642 * ~900 changes, numerous bugfixes
4647 * The [new object lifetime defaults][nold] have been [turned
4648 on][nold2] after a cycle of warnings about the change. Now types
4649 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
4650 being interpreted as `&'a Box<Trait+'a>` to `&'a
4651 Box<Trait+'static>`.
4652 * [The Rustonomicon][nom] is a new book in the official documentation
4653 that dives into writing unsafe Rust.
4654 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
4655 timekeeping is employed by other std APIs, as well as out-of-tree
4661 * The [new object lifetime defaults][nold] have been [turned
4662 on][nold2] after a cycle of warnings about the change.
4663 * There is a known [regression][lr] in how object lifetime elision is
4664 interpreted, the proper solution for which is undetermined.
4665 * The `#[prelude_import]` attribute, an internal implementation
4666 detail, was accidentally stabilized previously. [It has been put
4667 behind the `prelude_import` feature gate][pi]. This change is
4668 believed to break no existing code.
4669 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4670 [more sane for dynamically sized types][dst3]. Code that relied on
4671 the previous behavior is thought to be broken.
4672 * The `dropck` rules, which checks that destructors can't access
4673 destroyed values, [have been updated][dropck] to match the
4674 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
4675 cause some previously-compiling code to no longer build.
4680 * The [new object lifetime defaults][nold] have been [turned
4681 on][nold2] after a cycle of warnings about the change.
4682 * Semicolons may [now follow types and paths in
4683 macros](https://github.com/rust-lang/rust/pull/27000).
4684 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4685 [more sane for dynamically sized types][dst3]. Code that relied on
4686 the previous behavior is not known to exist, and suspected to be
4688 * `'static` variables [may now be recursive][st].
4689 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
4690 implementations correctly.
4691 * The `dropck` rules, which checks that destructors can't access
4692 destroyed values, [have been updated][dropck] to match the
4698 * The [`Duration`] API, [has been stabilized][ds], as well as the
4699 `std::time` module, which presently contains only `Duration`.
4700 * `Box<str>` and `Box<[T]>` both implement `Clone`.
4701 * The owned C string, [`CString`], implements [`Borrow`] and the
4702 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
4703 these allow C strings to be borrowed and cloned in generic code.
4704 * [`CStr`] implements [`Debug`].
4705 * [`AtomicPtr`] implements [`Debug`].
4706 * [`Error`] trait objects [can be downcast to their concrete types][e]
4707 in many common configurations, using the [`is`], [`downcast`],
4708 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
4710 * Searching for substrings now [employs the two-way algorithm][search]
4711 instead of doing a naive search. This gives major speedups to a
4712 number of methods, including [`contains`][sc], [`find`][sf],
4713 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
4714 [`ends_with`][sew] are also faster.
4715 * The performance of `PartialEq` for slices is [much faster][ps].
4716 * The [`Hash`] trait offers the default method, [`hash_slice`], which
4717 is overridden and optimized by the implementations for scalars.
4718 * The [`Hasher`] trait now has a number of specialized `write_*`
4719 methods for primitive types, for efficiency.
4720 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
4721 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
4722 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
4723 of [`std::error::Error::cause`][iec] also delegates to the inner
4725 * [`process::Child`][pc] gained the [`id`] method, which returns a
4726 `u32` representing the platform-specific process identifier.
4727 * The [`connect`] method on slices is deprecated, replaced by the new
4728 [`join`] method (note that both of these are on the *unstable*
4729 [`SliceConcatExt`] trait, but through the magic of the prelude are
4730 available to stable code anyway).
4731 * The [`Div`] operator is implemented for [`Wrapping`] types.
4732 * [`DerefMut` is implemented for `String`][dms].
4733 * Performance of SipHash (the default hasher for `HashMap`) is
4734 [better for long data][sh].
4735 * [`AtomicPtr`] implements [`Send`].
4736 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
4737 are now [specialized to use uninitialized buffers for increased
4739 * Lifetime parameters of foreign functions [are now resolved
4745 * Rust can now, with some coercion, [produce programs that run on
4746 Windows XP][xp], though XP is not considered a supported platform.
4747 * Porting Rust on Windows from the GNU toolchain to MSVC continues
4748 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
4749 recommended for use in 1.3, though should be fully-functional
4750 in the [64-bit 1.4 beta][b14].
4751 * On Fedora-based systems installation will [properly configure the
4752 dynamic linker][fl].
4753 * The compiler gained many new extended error descriptions, which can
4754 be accessed with the `--explain` flag.
4755 * The `dropck` pass, which checks that destructors can't access
4756 destroyed values, [has been rewritten][dropck]. This fixes some
4757 soundness holes, and as such will cause some previously-compiling
4758 code to no longer build.
4759 * `rustc` now uses [LLVM to write archive files where possible][ar].
4760 Eventually this will eliminate the compiler's dependency on the ar
4762 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
4763 supported FreeBSD on x86_64).
4764 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
4765 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
4767 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
4768 will kill the process instead of leaking][nlp].
4770 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
4771 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
4772 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
4773 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
4774 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
4775 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4776 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4777 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
4778 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
4779 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
4780 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
4781 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
4782 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
4783 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4784 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
4785 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
4786 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
4787 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
4788 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4789 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
4790 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
4791 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
4792 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
4793 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4794 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
4795 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
4796 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
4797 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
4798 [ar]: https://github.com/rust-lang/rust/pull/26926
4799 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
4800 [dms]: https://github.com/rust-lang/rust/pull/26241
4801 [dropck]: https://github.com/rust-lang/rust/pull/27261
4802 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4803 [ds]: https://github.com/rust-lang/rust/pull/26818
4804 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
4805 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
4806 [dst3]: https://github.com/rust-lang/rust/pull/27351
4807 [e]: https://github.com/rust-lang/rust/pull/24793
4808 [f]: https://github.com/rust-lang/rust/pull/26588
4809 [fb]: https://github.com/rust-lang/rust/pull/26959
4810 [fl]: https://github.com/rust-lang/rust-installer/pull/41
4811 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4812 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
4813 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
4814 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
4815 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
4816 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
4817 [lic]: https://github.com/rust-lang/rust/pull/26583
4818 [lnu]: https://github.com/rust-lang/rust/pull/27026
4819 [lr]: https://github.com/rust-lang/rust/issues/27248
4820 [lum]: https://github.com/rust-lang/rust/pull/26378
4821 [lur]: https://github.com/rust-lang/rust/pull/26783
4822 [nlp]: https://github.com/rust-lang/rust/pull/27176
4823 [nold2]: https://github.com/rust-lang/rust/pull/27045
4824 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
4825 [nom]: http://doc.rust-lang.org/nightly/nomicon/
4826 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
4827 [pi]: https://github.com/rust-lang/rust/pull/26699
4828 [ps]: https://github.com/rust-lang/rust/pull/26884
4829 [rte]: https://github.com/rust-lang/rust/pull/26950
4830 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
4831 [search]: https://github.com/rust-lang/rust/pull/26327
4832 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
4833 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
4834 [sh]: https://github.com/rust-lang/rust/pull/27280
4835 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
4836 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
4837 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
4838 [st]: https://github.com/rust-lang/rust/pull/26630
4839 [win1]: https://github.com/rust-lang/rust/pull/26569
4840 [win2]: https://github.com/rust-lang/rust/pull/26741
4841 [win3]: https://github.com/rust-lang/rust/pull/26741
4842 [win4]: https://github.com/rust-lang/rust/pull/27210
4843 [xp]: https://github.com/rust-lang/rust/pull/26569
4845 Version 1.2.0 (2015-08-07)
4846 ==========================
4848 * ~1200 changes, numerous bugfixes
4853 * [Dynamically-sized-type coercions][dst] allow smart pointer types
4854 like `Rc` to contain types without a fixed size, arrays and trait
4855 objects, finally enabling use of `Rc<[T]>` and completing the
4856 implementation of DST.
4857 * [Parallel codegen][parcodegen] is now working again, which can
4858 substantially speed up large builds in debug mode; It also gets
4859 another ~33% speedup when bootstrapping on a 4 core machine (using 8
4860 jobs). It's not enabled by default, but will be "in the near
4861 future". It can be activated with the `-C codegen-units=N` flag to
4863 * This is the first release with [experimental support for linking
4864 with the MSVC linker and lib C on Windows (instead of using the GNU
4865 variants via MinGW)][win]. It is yet recommended only for the most
4866 intrepid Rustaceans.
4867 * Benchmark compilations are showing a 30% improvement in
4868 bootstrapping over 1.1.
4873 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
4874 unicode case mapping, which is a previously-planned change in
4875 behavior and considered a bugfix.
4876 * [`mem::align_of`] now specifies [the *minimum alignment* for
4877 T][align], which is usually the alignment programs are interested
4878 in, and the same value reported by clang's
4879 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
4881 * [The `#[packed]` attribute is no longer silently accepted by the
4882 compiler][packed]. This attribute did nothing and code that
4883 mentioned it likely did not work as intended.
4884 * Associated type defaults are [now behind the
4885 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
4886 defaults *did not work*, but could be mentioned syntactically. As
4887 such this breakage has minimal impact.
4892 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
4893 matching against dereferenceable values.
4898 * The [`Extend`] trait, which grows a collection from an iterator, is
4899 implemented over iterators of references, for `String`, `Vec`,
4900 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
4901 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
4902 * The [`iter::once`] function returns an iterator that yields a single
4903 element, and [`iter::empty`] returns an iterator that yields no
4905 * The [`matches`] and [`rmatches`] methods on `str` return iterators
4906 over substring matches.
4907 * [`Cell`] and [`RefCell`] both implement `Eq`.
4908 * A number of methods for wrapping arithmetic are added to the
4909 integral types, [`wrapping_div`], [`wrapping_rem`],
4910 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
4911 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
4912 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
4913 type.. It is illegal for the default arithmetic operations in Rust
4914 to overflow; the desire to wrap must be explicit.
4915 * The `{:#?}` formatting specifier [displays the alternate,
4916 pretty-printed][debugfmt] form of the `Debug` formatter. This
4917 feature was actually introduced prior to 1.0 with little
4919 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
4920 for writing data to formatted strings, similar to [`io::Write`].
4921 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
4922 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
4923 are used by code generators to emit implementations of [`Debug`].
4924 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
4925 methods that convert case, following Unicode case mapping.
4926 * It is now easier to handle poisoned locks. The [`PoisonError`]
4927 type, returned by failing lock operations, exposes `into_inner`,
4928 `get_ref`, and `get_mut`, which all give access to the inner lock
4929 guard, and allow the poisoned lock to continue to operate. The
4930 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
4931 poisoned lock without attempting to take the lock.
4932 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
4933 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
4934 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
4935 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
4937 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
4943 * `rustc` employs smarter heuristics for guessing at [typos].
4944 * `rustc` emits more efficient code for [no-op conversions between
4945 unsafe pointers][nop].
4946 * Fat pointers are now [passed in pairs of immediate arguments][fat],
4947 resulting in faster compile times and smaller code.
4949 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
4950 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4951 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
4952 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
4953 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
4954 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
4955 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
4956 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
4957 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
4958 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
4959 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
4960 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
4961 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
4962 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
4963 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
4964 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
4965 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4966 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
4967 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
4968 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
4969 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
4970 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
4971 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
4972 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
4973 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
4974 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4975 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
4976 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
4977 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
4978 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
4979 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
4980 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
4981 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
4982 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4983 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4984 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
4985 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
4986 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
4987 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
4988 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
4989 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
4990 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4991 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
4992 [align]: https://github.com/rust-lang/rust/pull/25646
4993 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
4994 [typos]: https://github.com/rust-lang/rust/pull/26087
4995 [nop]: https://github.com/rust-lang/rust/pull/26336
4996 [fat]: https://github.com/rust-lang/rust/pull/26411
4997 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
4998 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
4999 [packed]: https://github.com/rust-lang/rust/pull/25541
5000 [ad]: https://github.com/rust-lang/rust/pull/27382
5001 [win]: https://github.com/rust-lang/rust/pull/25350
5003 Version 1.1.0 (2015-06-25)
5004 =========================
5006 * ~850 changes, numerous bugfixes
5011 * The [`std::fs` module has been expanded][fs] to expand the set of
5012 functionality exposed:
5013 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
5014 don't incur a syscall on some platforms.
5015 * A `symlink_metadata` function has been added.
5016 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
5017 access to all underlying information.
5018 * The compiler now contains extended explanations of many errors. When an error
5019 with an explanation occurs the compiler suggests using the `--explain` flag
5020 to read the explanation. Error explanations are also [available online][err-index].
5021 * Thanks to multiple [improvements][sk] to [type checking][pre], as
5022 well as other work, the time to bootstrap the compiler decreased by
5028 * The [`str::split_whitespace`] method splits a string on unicode
5029 whitespace boundaries.
5030 * On both Windows and Unix, new extension traits provide conversion of
5031 I/O types to and from the underlying system handles. On Unix, these
5032 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
5033 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
5034 `TcpListener`, and `UpdSocket`. Further implementations for
5035 `std::process` will be stabilized later.
5036 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
5037 Windows, symlinks can be created with
5038 `std::os::windows::symlink_dir` and
5039 `std::os::windows::symlink_file`.
5040 * The `mpsc::Receiver` type can now be converted into an iterator with
5041 `into_iter` on the [`IntoIterator`] trait.
5042 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
5043 implementation of the [`From`] trait.
5044 * The `Debug` implementation for `RangeFull` [creates output that is
5045 more consistent with other implementations][rf].
5046 * [`Debug` is implemented for `File`][file].
5047 * The `Default` implementation for `Arc` [no longer requires `Sync +
5049 * [The `Iterator` methods `count`, `nth`, and `last` have been
5050 overridden for slices to have O(1) performance instead of O(n)][si].
5051 * Incorrect handling of paths on Windows has been improved in both the
5052 compiler and the standard library.
5053 * [`AtomicPtr` gained a `Default` implementation][ap].
5054 * In accordance with Rust's policy on arithmetic overflow `abs` now
5055 [panics on overflow when debug assertions are enabled][abs].
5056 * The [`Cloned`] iterator, which was accidentally left unstable for
5057 1.0 [has been stabilized][c].
5058 * The [`Incoming`] iterator, which iterates over incoming TCP
5059 connections, and which was accidentally unnamable in 1.0, [is now
5060 properly exported][inc].
5061 * [`BinaryHeap`] no longer corrupts itself [when functions called by
5062 `sift_up` or `sift_down` panic][bh].
5063 * The [`split_off`] method of `LinkedList` [no longer corrupts
5064 the list in certain scenarios][ll].
5069 * Type checking performance [has improved notably][sk] with
5070 [multiple improvements][pre].
5071 * The compiler [suggests code changes][ch] for more errors.
5072 * rustc and it's build system have experimental support for [building
5073 toolchains against MUSL][m] instead of glibc on Linux.
5074 * The compiler defines the `target_env` cfg value, which is used for
5075 distinguishing toolchains that are otherwise for the same
5076 platform. Presently this is set to `gnu` for common GNU Linux
5077 targets and for MinGW targets, and `musl` for MUSL Linux targets.
5078 * The [`cargo rustc`][crc] command invokes a build with custom flags
5080 * [Android executables are always position independent][pie].
5081 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
5084 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
5085 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
5086 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
5087 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
5088 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
5089 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
5090 [rf]: https://github.com/rust-lang/rust/pull/24491
5091 [err-index]: https://doc.rust-lang.org/error-index.html
5092 [sk]: https://github.com/rust-lang/rust/pull/24615
5093 [pre]: https://github.com/rust-lang/rust/pull/25323
5094 [file]: https://github.com/rust-lang/rust/pull/24598
5095 [ch]: https://github.com/rust-lang/rust/pull/24683
5096 [arc]: https://github.com/rust-lang/rust/pull/24695
5097 [si]: https://github.com/rust-lang/rust/pull/24701
5098 [ap]: https://github.com/rust-lang/rust/pull/24834
5099 [m]: https://github.com/rust-lang/rust/pull/24777
5100 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
5101 [crc]: https://github.com/rust-lang/cargo/pull/1568
5102 [pie]: https://github.com/rust-lang/rust/pull/24953
5103 [abs]: https://github.com/rust-lang/rust/pull/25441
5104 [c]: https://github.com/rust-lang/rust/pull/25496
5105 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
5106 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
5107 [inc]: https://github.com/rust-lang/rust/pull/25522
5108 [bh]: https://github.com/rust-lang/rust/pull/25856
5109 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
5110 [ll]: https://github.com/rust-lang/rust/pull/26022
5111 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
5112 [drop]: https://github.com/rust-lang/rust/pull/24935
5114 Version 1.0.0 (2015-05-15)
5115 ========================
5117 * ~1500 changes, numerous bugfixes
5122 * The vast majority of the standard library is now `#[stable]`. It is
5123 no longer possible to use unstable features with a stable build of
5125 * Many popular crates on [crates.io] now work on the stable release
5127 * Arithmetic on basic integer types now [checks for overflow in debug
5133 * Several [restrictions have been added to trait coherence][coh] in
5134 order to make it easier for upstream authors to change traits
5135 without breaking downstream code.
5136 * Digits of binary and octal literals are [lexed more eagerly][lex] to
5137 improve error messages and macro behavior. For example, `0b1234` is
5138 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
5139 * Trait bounds [are always invariant][inv], eliminating the need for
5140 the `PhantomFn` and `MarkerTrait` lang items, which have been
5142 * ["-" is no longer a valid character in crate names][cr], the `extern crate
5143 "foo" as bar` syntax has been replaced with `extern crate foo as
5144 bar`, and Cargo now automatically translates "-" in *package* names
5145 to underscore for the crate name.
5146 * [Lifetime shadowing is an error][lt].
5147 * [`Send` no longer implies `'static`][send-rfc].
5148 * [UFCS now supports trait-less associated paths][moar-ufcs] like
5149 `MyType::default()`.
5150 * Primitive types [now have inherent methods][prim-inherent],
5151 obviating the need for extension traits like `SliceExt`.
5152 * Methods with `Self: Sized` in their `where` clause are [considered
5153 object-safe][self-sized], allowing many extension traits like
5154 `IteratorExt` to be merged into the traits they extended.
5155 * You can now [refer to associated types][assoc-where] whose
5156 corresponding trait bounds appear only in a `where` clause.
5157 * The final bits of [OIBIT landed][oibit-final], meaning that traits
5158 like `Send` and `Sync` are now library-defined.
5159 * A [Reflect trait][reflect] was introduced, which means that
5160 downcasting via the `Any` trait is effectively limited to concrete
5161 types. This helps retain the potentially-important "parametricity"
5162 property: generic code cannot behave differently for different type
5163 arguments except in minor ways.
5164 * The `unsafe_destructor` feature is now deprecated in favor of the
5165 [new `dropck`][dropck]. This change is a major reduction in unsafe
5171 * The `thread_local` module [has been renamed to `std::thread`][th].
5172 * The methods of `IteratorExt` [have been moved to the `Iterator`
5174 * Several traits that implement Rust's conventions for type
5175 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
5176 [centralized in the `std::convert` module][con].
5177 * The `FromError` trait [was removed in favor of `From`][fe].
5178 * The basic sleep function [has moved to
5179 `std::thread::sleep_ms`][slp].
5180 * The `splitn` function now takes an `n` parameter that represents the
5181 number of items yielded by the returned iterator [instead of the
5182 number of 'splits'][spl].
5183 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
5184 * [Derived implementations of `PartialOrd` now order enums according
5185 to their explicitly-assigned discriminants][po].
5186 * [Methods for searching strings are generic over `Pattern`s][pat],
5187 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
5189 * [In method resolution, object methods are resolved before inherent
5191 * [`String::from_str` has been deprecated in favor of the `From` impl,
5192 `String::from`][sf].
5193 * [`io::Error` implements `Sync`][ios].
5194 * [The `words` method on `&str` has been replaced with
5195 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
5197 * The new path and IO modules are complete and `#[stable]`. This
5198 was the major library focus for this cycle.
5199 * The path API was [revised][path-normalize] to normalize `.`,
5200 adjusting the tradeoffs in favor of the most common usage.
5201 * A large number of remaining APIs in `std` were also stabilized
5202 during this cycle; about 75% of the non-deprecated API surface
5204 * The new [string pattern API][string-pattern] landed, which makes
5205 the string slice API much more internally consistent and flexible.
5206 * A new set of [generic conversion traits][conversion] replaced
5207 many existing ad hoc traits.
5208 * Generic numeric traits were [completely removed][num-traits]. This
5209 was made possible thanks to inherent methods for primitive types,
5210 and the removal gives maximal flexibility for designing a numeric
5211 hierarchy in the future.
5212 * The `Fn` traits are now related via [inheritance][fn-inherit]
5213 and provide ergonomic [blanket implementations][fn-blanket].
5214 * The `Index` and `IndexMut` traits were changed to
5215 [take the index by value][index-value], enabling code like
5216 `hash_map["string"]` to work.
5217 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
5218 `Copy` data is known to be `Clone` as well.
5223 * Many errors now have extended explanations that can be accessed with
5224 the `--explain` flag to `rustc`.
5225 * Many new examples have been added to the standard library
5227 * rustdoc has received a number of improvements focused on completion
5229 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
5230 * Much headway was made on ecosystem-wide CI, making it possible
5231 to [compare builds for breakage][ci-compare].
5234 [crates.io]: http://crates.io
5235 [clo]: https://github.com/rust-lang/rust/pull/24034
5236 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
5237 [con]: https://github.com/rust-lang/rust/pull/23875
5238 [cr]: https://github.com/rust-lang/rust/pull/23419
5239 [fe]: https://github.com/rust-lang/rust/pull/23879
5240 [ie]: https://github.com/rust-lang/rust/pull/23300
5241 [inv]: https://github.com/rust-lang/rust/pull/23938
5242 [ios]: https://github.com/rust-lang/rust/pull/24133
5243 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
5244 [lt]: https://github.com/rust-lang/rust/pull/24057
5245 [meth]: https://github.com/rust-lang/rust/pull/24056
5246 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
5247 [po]: https://github.com/rust-lang/rust/pull/24270
5248 [sf]: https://github.com/rust-lang/rust/pull/24517
5249 [slp]: https://github.com/rust-lang/rust/pull/23949
5250 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
5251 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
5252 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
5253 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
5254 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
5255 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
5256 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
5257 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
5258 [self-sized]: https://github.com/rust-lang/rust/pull/22301
5259 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
5260 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
5261 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
5262 [reflect]: https://github.com/rust-lang/rust/pull/23712
5263 [conversion]: https://github.com/rust-lang/rfcs/pull/529
5264 [num-traits]: https://github.com/rust-lang/rust/pull/23549
5265 [index-value]: https://github.com/rust-lang/rust/pull/23601
5266 [dropck]: https://github.com/rust-lang/rfcs/pull/769
5267 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
5268 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
5269 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
5270 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
5271 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
5274 Version 1.0.0-alpha.2 (2015-02-20)
5275 =====================================
5277 * ~1300 changes, numerous bugfixes
5281 * The various I/O modules were [overhauled][io-rfc] to reduce
5282 unnecessary abstractions and provide better interoperation with
5283 the underlying platform. The old `io` module remains temporarily
5285 * The standard library now [participates in feature gating][feat],
5286 so use of unstable libraries now requires a `#![feature(...)]`
5287 attribute. The impact of this change is [described on the
5288 forum][feat-forum]. [RFC][feat-rfc].
5292 * `for` loops [now operate on the `IntoIterator` trait][into],
5293 which eliminates the need to call `.iter()`, etc. to iterate
5294 over collections. There are some new subtleties to remember
5295 though regarding what sort of iterators various types yield, in
5296 particular that `for foo in bar { }` yields values from a move
5297 iterator, destroying the original collection. [RFC][into-rfc].
5298 * Objects now have [default lifetime bounds][obj], so you don't
5299 have to write `Box<Trait+'static>` when you don't care about
5300 storing references. [RFC][obj-rfc].
5301 * In types that implement `Drop`, [lifetimes must outlive the
5302 value][drop]. This will soon make it possible to safely
5303 implement `Drop` for types where `#[unsafe_destructor]` is now
5304 required. Read the [gorgeous RFC][drop-rfc] for details.
5305 * The fully qualified <T as Trait>::X syntax lets you set the Self
5306 type for a trait method or associated type. [RFC][ufcs-rfc].
5307 * References to types that implement `Deref<U>` now [automatically
5308 coerce to references][deref] to the dereferenced type `U`,
5309 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
5310 should eliminate many unsightly uses of `&*`, as when converting
5311 from references to vectors into references to
5312 slices. [RFC][deref-rfc].
5313 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
5314 `|:|`) is obsolete and closure kind is inferred from context.
5315 * [`Self` is a keyword][Self].
5319 * The `Show` and `String` formatting traits [have been
5320 renamed][fmt] to `Debug` and `Display` to more clearly reflect
5321 their related purposes. Automatically getting a string
5322 conversion to use with `format!("{:?}", something_to_debug)` is
5323 now written `#[derive(Debug)]`.
5324 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
5325 OsStr}`, provide strings in platform-specific encodings for easier
5326 interop with system APIs. [RFC][osstr-rfc].
5327 * The `boxed::into_raw` and `Box::from_raw` functions [convert
5328 between `Box<T>` and `*mut T`][boxraw], a common pattern for
5329 creating raw pointers.
5333 * Certain long error messages of the form 'expected foo found bar'
5334 are now [split neatly across multiple
5335 lines][multiline]. Examples in the PR.
5336 * On Unix Rust can be [uninstalled][un] by running
5337 `/usr/local/lib/rustlib/uninstall.sh`.
5338 * The `#[rustc_on_unimplemented]` attribute, requiring the
5339 'on_unimplemented' feature, lets rustc [display custom error
5340 messages when a trait is expected to be implemented for a type
5345 * Rust is tested against a [LALR grammar][lalr], which parses
5346 almost all the Rust files that rustc does.
5348 [boxraw]: https://github.com/rust-lang/rust/pull/21318
5349 [close]: https://github.com/rust-lang/rust/pull/21843
5350 [deref]: https://github.com/rust-lang/rust/pull/21351
5351 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
5352 [drop]: https://github.com/rust-lang/rust/pull/21972
5353 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
5354 [feat]: https://github.com/rust-lang/rust/pull/21248
5355 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
5356 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
5357 [fmt]: https://github.com/rust-lang/rust/pull/21457
5358 [into]: https://github.com/rust-lang/rust/pull/20790
5359 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
5360 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5361 [lalr]: https://github.com/rust-lang/rust/pull/21452
5362 [multiline]: https://github.com/rust-lang/rust/pull/19870
5363 [obj]: https://github.com/rust-lang/rust/pull/22230
5364 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
5365 [onun]: https://github.com/rust-lang/rust/pull/20889
5366 [osstr]: https://github.com/rust-lang/rust/pull/21488
5367 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5368 [Self]: https://github.com/rust-lang/rust/pull/22158
5369 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
5370 [un]: https://github.com/rust-lang/rust/pull/22256
5373 Version 1.0.0-alpha (2015-01-09)
5374 ==================================
5376 * ~2400 changes, numerous bugfixes
5380 * The language itself is considered feature complete for 1.0,
5381 though there will be many usability improvements and bugfixes
5382 before the final release.
5383 * Nearly 50% of the public API surface of the standard library has
5384 been declared 'stable'. Those interfaces are unlikely to change
5386 * The long-running debate over integer types has been
5387 [settled][ints]: Rust will ship with types named `isize` and
5388 `usize`, rather than `int` and `uint`, for pointer-sized
5389 integers. Guidelines will be rolled out during the alpha cycle.
5390 * Most crates that are not `std` have been moved out of the Rust
5391 distribution into the Cargo ecosystem so they can evolve
5392 separately and don't need to be stabilized as quickly, including
5393 'time', 'getopts', 'num', 'regex', and 'term'.
5394 * Documentation continues to be expanded with more API coverage, more
5395 examples, and more in-depth explanations. The guides have been
5396 consolidated into [The Rust Programming Language][trpl].
5397 * "[Rust By Example][rbe]" is now maintained by the Rust team.
5398 * All official Rust binary installers now come with [Cargo], the
5399 Rust package manager.
5403 * Closures have been [completely redesigned][unboxed] to be
5404 implemented in terms of traits, can now be used as generic type
5405 bounds and thus monomorphized and inlined, or via an opaque
5406 pointer (boxed) as in the old system. The new system is often
5407 referred to as 'unboxed' closures.
5408 * Traits now support [associated types][assoc], allowing families
5409 of related types to be defined together and used generically in
5411 * Enum variants are [namespaced by their type names][enum].
5412 * [`where` clauses][where] provide a more versatile and attractive
5413 syntax for specifying generic bounds, though the previous syntax
5415 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
5417 * Rust [no longer has a runtime][rt] of any description, and only
5418 supports OS threads, not green threads.
5419 * At long last, Rust has been overhauled for 'dynamically-sized
5420 types' ([DST]), which integrates 'fat pointers' (object types,
5421 arrays, and `str`) more deeply into the type system, making it
5423 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
5424 `..j` that produce range types and which, when combined with the
5425 `Index` operator and multidispatch, leads to a convenient slice
5427 * The new range syntax revealed an ambiguity in the fixed-length
5428 array syntax, so now fixed length arrays [are written `[T;
5430 * The `Copy` trait is no longer implemented automatically. Unsafe
5431 pointers no longer implement `Sync` and `Send` so types
5432 containing them don't automatically either. `Sync` and `Send`
5433 are now 'unsafe traits' so one can "forcibly" implement them via
5434 `unsafe impl` if a type confirms to the requirements for them
5435 even though the internals do not (e.g. structs containing unsafe
5436 pointers like `Arc`). These changes are intended to prevent some
5437 footguns and are collectively known as [opt-in built-in
5438 traits][oibit] (though `Sync` and `Send` will soon become pure
5439 library types unknown to the compiler).
5440 * Operator traits now take their operands [by value][ops], and
5441 comparison traits can use multidispatch to compare one type
5442 against multiple other types, allowing e.g. `String` to be
5443 compared with `&str`.
5444 * `if let` and `while let` are no longer feature-gated.
5445 * Rust has adopted a more [uniform syntax for escaping unicode
5446 characters][unicode].
5447 * `macro_rules!` [has been declared stable][mac]. Though it is a
5448 flawed system it is sufficiently popular that it must be usable
5449 for 1.0. Effort has gone into [future-proofing][mac-future] it
5450 in ways that will allow other macro systems to be developed in
5451 parallel, and won't otherwise impact the evolution of the
5453 * The prelude has been [pared back significantly][prelude] such
5454 that it is the minimum necessary to support the most pervasive
5455 code patterns, and through [generalized where clauses][where]
5456 many of the prelude extension traits have been consolidated.
5457 * Rust's rudimentary reflection [has been removed][refl], as it
5458 incurred too much code generation for little benefit.
5459 * [Struct variants][structvars] are no longer feature-gated.
5460 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
5461 known as 'higher-ranked trait bounds', this crucially allows
5462 unboxed closures to work.
5463 * Macros invocations surrounded by parens or square brackets and
5464 not terminated by a semicolon are [parsed as
5465 expressions][macros], which makes expressions like `vec![1i32,
5466 2, 3].len()` work as expected.
5467 * Trait objects now implement their traits automatically, and
5468 traits that can be coerced to objects now must be [object
5470 * Automatically deriving traits is now done with `#[derive(...)]`
5471 not `#[deriving(...)]` for [consistency with other naming
5472 conventions][derive].
5473 * Importing the containing module or enum at the same time as
5474 items or variants they contain is [now done with `self` instead
5475 of `mod`][self], as in use `foo::{self, bar}`
5476 * Glob imports are no longer feature-gated.
5477 * The `box` operator and `box` patterns have been feature-gated
5478 pending a redesign. For now unique boxes should be allocated
5479 like other containers, with `Box::new`.
5483 * A [series][coll1] of [efforts][coll2] to establish
5484 [conventions][coll3] for collections types has resulted in API
5485 improvements throughout the standard library.
5486 * New [APIs for error handling][err] provide ergonomic interop
5487 between error types, and [new conventions][err-conv] describe
5488 more clearly the recommended error handling strategies in Rust.
5489 * The `fail!` macro has been renamed to [`panic!`][panic] so that
5490 it is easier to discuss failure in the context of error handling
5491 without making clarifications as to whether you are referring to
5492 the 'fail' macro or failure more generally.
5493 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
5494 syscall when available.
5495 * The 'serialize' crate has been renamed 'rustc-serialize' and
5496 moved out of the distribution to Cargo. Although it is widely
5497 used now, it is expected to be superseded in the near future.
5498 * The `Show` formatter, typically implemented with
5499 `#[derive(Show)]` is [now requested with the `{:?}`
5500 specifier][show] and is intended for use by all types, for uses
5501 such as `println!` debugging. The new `String` formatter must be
5502 implemented by hand, uses the `{}` specifier, and is intended
5503 for full-fidelity conversions of things that can logically be
5504 represented as strings.
5508 * [Flexible target specification][flex] allows rustc's code
5509 generation to be configured to support otherwise-unsupported
5511 * Rust comes with rust-gdb and rust-lldb scripts that launch their
5512 respective debuggers with Rust-appropriate pretty-printing.
5513 * The Windows installation of Rust is distributed with the
5514 MinGW components currently required to link binaries on that
5519 * Nullable enum optimizations have been extended to more types so
5520 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
5521 space than the inner types themselves.
5522 * Work has begun on supporting AArch64.
5524 [Cargo]: https://crates.io
5525 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
5526 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
5527 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
5528 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
5529 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
5530 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
5531 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
5532 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
5533 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
5534 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
5535 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
5536 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
5537 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
5538 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
5539 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
5540 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
5541 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
5542 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
5543 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
5544 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
5545 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
5546 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
5547 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
5548 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
5549 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
5550 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
5551 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
5552 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
5553 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
5554 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
5555 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
5556 [trpl]: https://doc.rust-lang.org/book/index.html
5557 [rbe]: http://rustbyexample.com/
5560 Version 0.12.0 (2014-10-09)
5561 =============================
5563 * ~1900 changes, numerous bugfixes
5567 * The introductory documentation (now called The Rust Guide) has
5568 been completely rewritten, as have a number of supplementary
5570 * Rust's package manager, Cargo, continues to improve and is
5571 sometimes considered to be quite awesome.
5572 * Many API's in `std` have been reviewed and updated for
5573 consistency with the in-development Rust coding
5574 guidelines. The standard library documentation tracks
5575 stabilization progress.
5576 * Minor libraries have been moved out-of-tree to the rust-lang org
5577 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
5578 be installed with Cargo.
5579 * Lifetime elision allows lifetime annotations to be left off of
5580 function declarations in many common scenarios.
5581 * Rust now works on 64-bit Windows.
5584 * Indexing can be overloaded with the `Index` and `IndexMut`
5586 * The `if let` construct takes a branch only if the `let` pattern
5587 matches, currently behind the 'if_let' feature gate.
5588 * 'where clauses', a more flexible syntax for specifying trait
5589 bounds that is more aesthetic, have been added for traits and
5590 free functions. Where clauses will in the future make it
5591 possible to constrain associated types, which would be
5592 impossible with the existing syntax.
5593 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
5594 the 'slicing_syntax' feature gate, and can be overloaded with
5595 the `Slice` or `SliceMut` traits.
5596 * The syntax for matching of sub-slices has been changed to use a
5597 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
5598 consistency with other uses of `..` and to future-proof
5599 potential additional uses of the syntax.
5600 * The syntax for matching inclusive ranges in patterns has changed
5601 from `0..3` to `0...4` to be consistent with the exclusive range
5603 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
5604 c]`) has been put behind the 'advanced_slice_patterns' feature
5605 gate and may be removed in the future.
5606 * Components of tuples and tuple structs can be extracted using
5607 the `value.0` syntax, currently behind the `tuple_indexing`
5609 * The `#[crate_id]` attribute is no longer supported; versioning
5610 is handled by the package manager.
5611 * Renaming crate imports are now written `extern crate foo as bar`
5612 instead of `extern crate bar = foo`.
5613 * Renaming use statements are now written `use foo as bar` instead
5615 * `let` and `match` bindings and argument names in macros are now
5617 * The new, more efficient, closure types ('unboxed closures') have
5618 been added under a feature gate, 'unboxed_closures'. These will
5619 soon replace the existing closure types, once higher-ranked
5620 trait lifetimes are added to the language.
5621 * `move` has been added as a keyword, for indicating closures
5622 that capture by value.
5623 * Mutation and assignment is no longer allowed in pattern guards.
5624 * Generic structs and enums can now have trait bounds.
5625 * The `Share` trait is now called `Sync` to free up the term
5626 'shared' to refer to 'shared reference' (the default reference
5628 * Dynamically-sized types have been mostly implemented,
5629 unifying the behavior of fat-pointer types with the rest of the
5631 * As part of dynamically-sized types, the `Sized` trait has been
5632 introduced, which qualifying types implement by default, and
5633 which type parameters expect by default. To specify that a type
5634 parameter does not need to be sized, write `<Sized? T>`. Most
5635 types are `Sized`, notable exceptions being unsized arrays
5636 (`[T]`) and trait types.
5637 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
5638 * Lifetime bounds can now be applied to type parameters and object
5640 * The old, reference counted GC type, `Gc<T>` which was once
5641 denoted by the `@` sigil, has finally been removed. GC will be
5642 revisited in the future.
5645 * Library documentation has been improved for a number of modules.
5646 * Bit-vectors, collections::bitv has been modernized.
5647 * The url crate is deprecated in favor of
5648 http://github.com/servo/rust-url, which can be installed with
5650 * Most I/O stream types can be cloned and subsequently closed from
5652 * A `std::time::Duration` type has been added for use in I/O
5653 methods that rely on timers, as well as in the 'time' crate's
5654 `Timespec` arithmetic.
5655 * The runtime I/O abstraction layer that enabled the green thread
5656 scheduler to do non-thread-blocking I/O has been removed, along
5657 with the libuv-based implementation employed by the green thread
5658 scheduler. This will greatly simplify the future I/O work.
5659 * `collections::btree` has been rewritten to have a more
5660 idiomatic and efficient design.
5663 * rustdoc output now indicates the stability levels of API's.
5664 * The `--crate-name` flag can specify the name of the crate
5665 being compiled, like `#[crate_name]`.
5666 * The `-C metadata` specifies additional metadata to hash into
5667 symbol names, and `-C extra-filename` specifies additional
5668 information to put into the output filename, for use by the
5669 package manager for versioning.
5670 * debug info generation has continued to improve and should be
5671 more reliable under both gdb and lldb.
5672 * rustc has experimental support for compiling in parallel
5673 using the `-C codegen-units` flag.
5674 * rustc no longer encodes rpath information into binaries by
5678 * Stack usage has been optimized with LLVM lifetime annotations.
5679 * Official Rust binaries on Linux are more compatible with older
5680 kernels and distributions, built on CentOS 5.10.
5683 Version 0.11.0 (2014-07-02)
5684 ==========================
5686 * ~1700 changes, numerous bugfixes
5689 * ~[T] has been removed from the language. This type is superseded by
5691 * ~str has been removed from the language. This type is superseded by
5693 * ~T has been removed from the language. This type is superseded by the
5695 * @T has been removed from the language. This type is superseded by the
5696 standard library's std::gc::Gc<T> type.
5697 * Struct fields are now all private by default.
5698 * Vector indices and shift amounts are both required to be a `uint`
5699 instead of any integral type.
5700 * Byte character, byte string, and raw byte string literals are now all
5701 supported by prefixing the normal literal with a `b`.
5702 * Multiple ABIs are no longer allowed in an ABI string
5703 * The syntax for lifetimes on closures/procedures has been tweaked
5704 slightly: `<'a>|A, B|: 'b + K -> T`
5705 * Floating point modulus has been removed from the language; however it
5706 is still provided by a library implementation.
5707 * Private enum variants are now disallowed.
5708 * The `priv` keyword has been removed from the language.
5709 * A closure can no longer be invoked through a &-pointer.
5710 * The `use foo, bar, baz;` syntax has been removed from the language.
5711 * The transmute intrinsic no longer works on type parameters.
5712 * Statics now allow blocks/items in their definition.
5713 * Trait bounds are separated from objects with + instead of : now.
5714 * Objects can no longer be read while they are mutably borrowed.
5715 * The address of a static is now marked as insignificant unless the
5716 #[inline(never)] attribute is placed it.
5717 * The #[unsafe_destructor] attribute is now behind a feature gate.
5718 * Struct literals are no longer allowed in ambiguous positions such as
5719 if, while, match, and for..in.
5720 * Declaration of lang items and intrinsics are now feature-gated by
5722 * Integral literals no longer default to `int`, and floating point
5723 literals no longer default to `f64`. Literals must be suffixed with an
5724 appropriate type if inference cannot determine the type of the
5726 * The Box<T> type is no longer implicitly borrowed to &mut T.
5727 * Procedures are now required to not capture borrowed references.
5730 * The standard library is now a "facade" over a number of underlying
5731 libraries. This means that development on the standard library should
5732 be speedier due to smaller crates, as well as a clearer line between
5734 * A new library, libcore, lives under the standard library's facade
5735 which is Rust's "0-assumption" library, suitable for embedded and
5736 kernel development for example.
5737 * A regex crate has been added to the standard distribution. This crate
5738 includes statically compiled regular expressions.
5739 * The unwrap/unwrap_err methods on Result require a Show bound for
5740 better error messages.
5741 * The return types of the std::comm primitives have been centralized
5742 around the Result type.
5743 * A number of I/O primitives have gained the ability to time out their
5745 * A number of I/O primitives have gained the ability to close their
5746 reading/writing halves to cancel pending operations.
5747 * Reverse iterator methods have been removed in favor of `rev()` on
5748 their forward-iteration counterparts.
5749 * A bitflags! macro has been added to enable easy interop with C and
5750 management of bit flags.
5751 * A debug_assert! macro is now provided which is disabled when
5752 `--cfg ndebug` is passed to the compiler.
5753 * A graphviz crate has been added for creating .dot files.
5754 * The std::cast module has been migrated into std::mem.
5755 * The std::local_data api has been migrated from freestanding functions
5756 to being based on methods.
5757 * The Pod trait has been renamed to Copy.
5758 * jemalloc has been added as the default allocator for types.
5759 * The API for allocating memory has been changed to use proper alignment
5760 and sized deallocation
5761 * Connecting a TcpStream or binding a TcpListener is now based on a
5762 string address and a u16 port. This allows connecting to a hostname as
5764 * The Reader trait now contains a core method, read_at_least(), which
5765 correctly handles many repeated 0-length reads.
5766 * The process-spawning API is now centered around a builder-style
5768 * The :? printing qualifier has been moved from the standard library to
5769 an external libdebug crate.
5770 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
5771 have been renamed to Eq/Ord.
5772 * The select/plural methods have been removed from format!. The escapes
5773 for { and } have also changed from \{ and \} to {{ and }},
5775 * The TaskBuilder API has been re-worked to be a true builder, and
5776 extension traits for spawning native/green tasks have been added.
5779 * All breaking changes to the language or libraries now have their
5780 commit message annotated with `[breaking-change]` to allow for easy
5781 discovery of breaking changes.
5782 * The compiler will now try to suggest how to annotate lifetimes if a
5783 lifetime-related error occurs.
5784 * Debug info continues to be improved greatly with general bug fixes and
5785 better support for situations like link time optimization (LTO).
5786 * Usage of syntax extensions when cross-compiling has been fixed.
5787 * Functionality equivalent to GCC & Clang's -ffunction-sections,
5788 -fdata-sections and --gc-sections has been enabled by default
5789 * The compiler is now stricter about where it will load module files
5790 from when a module is declared via `mod foo;`.
5791 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
5792 Syntax extensions are now discovered via a "plugin registrar" type
5793 which will be extended in the future to other various plugins.
5794 * Lints have been restructured to allow for dynamically loadable lints.
5795 * A number of rustdoc improvements:
5796 * The HTML output has been visually redesigned.
5797 * Markdown is now powered by hoedown instead of sundown.
5798 * Searching heuristics have been greatly improved.
5799 * The search index has been reduced in size by a great amount.
5800 * Cross-crate documentation via `pub use` has been greatly improved.
5801 * Primitive types are now hyperlinked and documented.
5802 * Documentation has been moved from static.rust-lang.org/doc to
5804 * A new sandbox, play.rust-lang.org, is available for running and
5805 sharing rust code examples on-line.
5806 * Unused attributes are now more robustly warned about.
5807 * The dead_code lint now warns about unused struct fields.
5808 * Cross-compiling to iOS is now supported.
5809 * Cross-compiling to mipsel is now supported.
5810 * Stability attributes are now inherited by default and no longer apply
5811 to intra-crate usage, only inter-crate usage.
5812 * Error message related to non-exhaustive match expressions have been
5816 Version 0.10 (2014-04-03)
5817 =========================
5819 * ~1500 changes, numerous bugfixes
5822 * A new RFC process is now in place for modifying the language.
5823 * Patterns with `@`-pointers have been removed from the language.
5824 * Patterns with unique vectors (`~[T]`) have been removed from the
5826 * Patterns with unique strings (`~str`) have been removed from the
5828 * `@str` has been removed from the language.
5829 * `@[T]` has been removed from the language.
5830 * `@self` has been removed from the language.
5831 * `@Trait` has been removed from the language.
5832 * Headers on `~` allocations which contain `@` boxes inside the type for
5833 reference counting have been removed.
5834 * The semantics around the lifetimes of temporary expressions have changed,
5835 see #3511 and #11585 for more information.
5836 * Cross-crate syntax extensions are now possible, but feature gated. See
5837 #11151 for more information. This includes both `macro_rules!` macros as
5838 well as syntax extensions such as `format!`.
5839 * New lint modes have been added, and older ones have been turned on to be
5841 * Unnecessary parentheses
5844 * Uppercase variables
5845 * Publicly visible private types
5846 * `#[deriving]` with raw pointers
5847 * Unsafe functions can no longer be coerced to closures.
5848 * Various obscure macros such as `log_syntax!` are now behind feature gates.
5849 * The `#[simd]` attribute is now behind a feature gate.
5850 * Visibility is no longer allowed on `extern crate` statements, and
5851 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
5852 * Trailing commas are now allowed in argument lists and tuple patterns.
5853 * The `do` keyword has been removed, it is now a reserved keyword.
5854 * Default type parameters have been implemented, but are feature gated.
5855 * Borrowed variables through captures in closures are now considered soundly.
5856 * `extern mod` is now `extern crate`
5857 * The `Freeze` trait has been removed.
5858 * The `Share` trait has been added for types that can be shared among
5860 * Labels in macros are now hygienic.
5861 * Expression/statement macro invocations can be delimited with `{}` now.
5862 * Treatment of types allowed in `static mut` locations has been tweaked.
5863 * The `*` and `.` operators are now overloadable through the `Deref` and
5865 * `~Trait` and `proc` no longer have `Send` bounds by default.
5866 * Partial type hints are now supported with the `_` type marker.
5867 * An `Unsafe` type was introduced for interior mutability. It is now
5868 considered undefined to transmute from `&T` to `&mut T` without using the
5870 * The #[linkage] attribute was implemented for extern statics/functions.
5871 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
5872 * `Pod` was renamed to `Copy`.
5875 * The `libextra` library has been removed. It has now been decomposed into
5876 component libraries with smaller and more focused nuggets of
5877 functionality. The full list of libraries can be found on the
5878 documentation index page.
5879 * std: `std::condition` has been removed. All I/O errors are now propagated
5880 through the `Result` type. In order to assist with error handling, a
5881 `try!` macro for unwrapping errors with an early return and a lint for
5882 unused results has been added. See #12039 for more information.
5883 * std: The `vec` module has been renamed to `slice`.
5884 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
5885 This will become the only growable vector in the future.
5886 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
5887 are now found at `std::io::BufferedReader` instead of
5888 `std::io::buffered::BufferedReader`.
5889 * std: `print` and `println` are no longer in the prelude, the `print!` and
5890 `println!` macros are intended to be used instead.
5891 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
5892 attempts to statically prevent cycles.
5893 * std: The standard distribution is adopting the policy of pushing failure
5894 to the user rather than failing in libraries. Many functions (such as
5895 `slice::last()`) now return `Option<T>` instead of `T` + failing.
5896 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
5897 deriving mode: `#[deriving(Show)]`.
5898 * std: `ToStr` is now implemented for all types implementing `Show`.
5899 * std: The formatting trait methods now take `&self` instead of `&T`
5900 * std: The `invert()` method on iterators has been renamed to `rev()`
5901 * std: `std::num` has seen a reduction in the genericity of its traits,
5902 consolidating functionality into a few core traits.
5903 * std: Backtraces are now printed on task failure if the environment
5904 variable `RUST_BACKTRACE` is present.
5905 * std: Naming conventions for iterators have been standardized. More details
5906 can be found on the wiki's style guide.
5907 * std: `eof()` has been removed from the `Reader` trait. Specific types may
5908 still implement the function.
5909 * std: Networking types are now cloneable to allow simultaneous reads/writes.
5910 * std: `assert_approx_eq!` has been removed
5911 * std: The `e` and `E` formatting specifiers for floats have been added to
5912 print them in exponential notation.
5913 * std: The `Times` trait has been removed
5914 * std: Indications of variance and opting out of builtin bounds is done
5915 through marker types in `std::kinds::marker` now
5916 * std: `hash` has been rewritten, `IterBytes` has been removed, and
5917 `#[deriving(Hash)]` is now possible.
5918 * std: `SharedChan` has been removed, `Sender` is now cloneable.
5919 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
5920 * std: `Chan::new` is now `channel()`.
5921 * std: A new synchronous channel type has been implemented.
5922 * std: A `select!` macro is now provided for selecting over `Receiver`s.
5923 * std: `hashmap` and `trie` have been moved to `libcollections`
5924 * std: `run` has been rolled into `io::process`
5925 * std: `assert_eq!` now uses `{}` instead of `{:?}`
5926 * std: The equality and comparison traits have seen some reorganization.
5927 * std: `rand` has moved to `librand`.
5928 * std: `to_{lower,upper}case` has been implemented for `char`.
5929 * std: Logging has been moved to `liblog`.
5930 * collections: `HashMap` has been rewritten for higher performance and less
5932 * native: The default runtime is now `libnative`. If `libgreen` is desired,
5933 it can be booted manually. The runtime guide has more information and
5935 * native: All I/O functionality except signals has been implemented.
5936 * green: Task spawning with `libgreen` has been optimized with stack caching
5937 and various trimming of code.
5938 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
5939 * sync: The `extra::sync` module has been updated to modern rust (and moved
5940 to the `sync` library), tweaking and improving various interfaces while
5941 dropping redundant functionality.
5942 * sync: A new `Barrier` type has been added to the `sync` library.
5943 * sync: An efficient mutex for native and green tasks has been implemented.
5944 * serialize: The `base64` module has seen some improvement. It treats
5945 newlines better, has non-string error values, and has seen general
5947 * fourcc: A `fourcc!` macro was introduced
5948 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
5949 hexadecimal literal.
5952 * `rustpkg` has been deprecated and removed from the main repository. Its
5953 replacement, `cargo`, is under development.
5954 * Nightly builds of rust are now available
5955 * The memory usage of rustc has been improved many times throughout this
5957 * The build process supports disabling rpath support for the rustc binary
5959 * Code generation has improved in some cases, giving more information to the
5960 LLVM optimization passes to enable more extensive optimizations.
5961 * Debuginfo compatibility with lldb on OSX has been restored.
5962 * The master branch is now gated on an android bot, making building for
5963 android much more reliable.
5964 * Output flags have been centralized into one `--emit` flag.
5965 * Crate type flags have been centralized into one `--crate-type` flag.
5966 * Codegen flags have been consolidated behind a `-C` flag.
5967 * Linking against outdated crates now has improved error messages.
5968 * Error messages with lifetimes will often suggest how to annotate the
5969 function to fix the error.
5970 * Many more types are documented in the standard library, and new guides
5972 * Many `rustdoc` improvements:
5973 * code blocks are syntax highlighted.
5974 * render standalone markdown files.
5975 * the --test flag tests all code blocks by default.
5976 * exported macros are displayed.
5977 * re-exported types have their documentation inlined at the location of the
5979 * search works across crates that have been rendered to the same output
5983 Version 0.9 (2014-01-09)
5984 ==========================
5986 * ~1800 changes, numerous bugfixes
5989 * The `float` type has been removed. Use `f32` or `f64` instead.
5990 * A new facility for enabling experimental features (feature gating) has
5991 been added, using the crate-level `#[feature(foo)]` attribute.
5992 * Managed boxes (@) are now behind a feature gate
5993 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
5994 standard library's `Gc` or `Rc` types instead.
5995 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
5996 * Jumping back to the top of a loop is now done with `continue` instead of
5998 * Strings can no longer be mutated through index assignment.
5999 * Raw strings can be created via the basic `r"foo"` syntax or with matched
6000 hash delimiters, as in `r###"foo"###`.
6001 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
6003 * The `&fn` type is now written `|args| -> ret` to match the literal form.
6004 * `@fn`s have been removed.
6005 * `do` only works with procs in order to make it obvious what the cost
6007 * Single-element tuple-like structs can no longer be dereferenced to
6008 obtain the inner value. A more comprehensive solution for overloading
6009 the dereference operator will be provided in the future.
6010 * The `#[link(...)]` attribute has been replaced with
6011 `#[crate_id = "name#vers"]`.
6012 * Empty `impl`s must be terminated with empty braces and may not be
6013 terminated with a semicolon.
6014 * Keywords are no longer allowed as lifetime names; the `self` lifetime
6015 no longer has any special meaning.
6016 * The old `fmt!` string formatting macro has been removed.
6017 * `printf!` and `printfln!` (old-style formatting) removed in favor of
6018 `print!` and `println!`.
6019 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
6020 * The `extern mod foo (name = "bar")` syntax has been removed. Use
6021 `extern mod foo = "bar"` instead.
6022 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
6023 * Macros can have attributes.
6024 * Macros can expand to items with attributes.
6025 * Macros can expand to multiple items.
6026 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
6027 * Comments may be nested.
6028 * Values automatically coerce to trait objects they implement, without
6030 * Enum discriminants are no longer an entire word but as small as needed to
6031 contain all the variants. The `repr` attribute can be used to override
6032 the discriminant size, as in `#[repr(int)]` for integer-sized, and
6033 `#[repr(C)]` to match C enums.
6034 * Non-string literals are not allowed in attributes (they never worked).
6035 * The FFI now supports variadic functions.
6036 * Octal numeric literals, as in `0o7777`.
6037 * The `concat!` syntax extension performs compile-time string concatenation.
6038 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
6039 removed as Rust no longer uses segmented stacks.
6040 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
6041 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
6042 not `*`; ignoring remaining fields of a struct is also done with `..`,
6043 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
6044 * `rustc` supports the "win64" calling convention via `extern "win64"`.
6045 * `rustc` supports the "system" calling convention, which defaults to the
6046 preferred convention for the target platform, "stdcall" on 32-bit Windows,
6048 * The `type_overflow` lint (default: warn) checks literals for overflow.
6049 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
6050 * The `attribute_usage` lint (default: warn) warns about unknown
6052 * The `unknown_features` lint (default: warn) warns about unknown
6054 * The `dead_code` lint (default: warn) checks for dead code.
6055 * Rust libraries can be linked statically to one another
6056 * `#[link_args]` is behind the `link_args` feature gate.
6057 * Native libraries are now linked with `#[link(name = "foo")]`
6058 * Native libraries can be statically linked to a rust crate
6059 (`#[link(name = "foo", kind = "static")]`).
6060 * Native OS X frameworks are now officially supported
6061 (`#[link(name = "foo", kind = "framework")]`).
6062 * The `#[thread_local]` attribute creates thread-local (not task-local)
6063 variables. Currently behind the `thread_local` feature gate.
6064 * The `return` keyword may be used in closures.
6065 * Types that can be copied via a memcpy implement the `Pod` kind.
6066 * The `cfg` attribute can now be used on struct fields and enum variants.
6069 * std: The `option` and `result` API's have been overhauled to make them
6070 simpler, more consistent, and more composable.
6071 * std: The entire `std::io` module has been replaced with one that is
6072 more comprehensive and that properly interfaces with the underlying
6073 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
6075 * std: `io::util` contains a number of useful implementations of
6076 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
6077 `ZeroReader`, `TeeReader`.
6078 * std: The reference counted pointer type `extra::rc` moved into std.
6079 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
6080 just a wrapper around it).
6081 * std: The `Either` type has been removed.
6082 * std: `fmt::Default` can be implemented for any type to provide default
6083 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
6084 * std: The `rand` API continues to be tweaked.
6085 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
6086 on failure in gdb, is now named `rust_fail`.
6087 * std: The `each_key` and `each_value` methods on `HashMap` have been
6088 replaced by the `keys` and `values` iterators.
6089 * std: Functions dealing with type size and alignment have moved from the
6090 `sys` module to the `mem` module.
6091 * std: The `path` module was written and API changed.
6092 * std: `str::from_utf8` has been changed to cast instead of allocate.
6093 * std: `starts_with` and `ends_with` methods added to vectors via the
6094 `ImmutableEqVector` trait, which is in the prelude.
6095 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
6096 if the index is out of bounds.
6097 * std: Task failure no longer propagates between tasks, as the model was
6098 complex, expensive, and incompatible with thread-based tasks.
6099 * std: The `Any` type can be used for dynamic typing.
6100 * std: `~Any` can be passed to the `fail!` macro and retrieved via
6102 * std: Methods that produce iterators generally do not have an `_iter`
6104 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
6105 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
6106 * std: `util::ignore` renamed to `prelude::drop`.
6107 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
6109 * std: `vec::raw` has seen a lot of cleanup and API changes.
6110 * std: The standard library no longer includes any C++ code, and very
6111 minimal C, eliminating the dependency on libstdc++.
6112 * std: Runtime scheduling and I/O functionality has been factored out into
6113 extensible interfaces and is now implemented by two different crates:
6114 libnative, for native threading and I/O; and libgreen, for green threading
6115 and I/O. This paves the way for using the standard library in more limited
6116 embedded environments.
6117 * std: The `comm` module has been rewritten to be much faster, have a
6118 simpler, more consistent API, and to work for both native and green
6120 * std: All libuv dependencies have been moved into the rustuv crate.
6121 * native: New implementations of runtime scheduling on top of OS threads.
6122 * native: New native implementations of TCP, UDP, file I/O, process spawning,
6124 * green: The green thread scheduler and message passing types are almost
6126 * extra: The `flatpipes` module had bitrotted and was removed.
6127 * extra: All crypto functions have been removed and Rust now has a policy of
6128 not reimplementing crypto in the standard library. In the future crypto
6129 will be provided by external crates with bindings to established libraries.
6130 * extra: `c_vec` has been modernized.
6131 * extra: The `sort` module has been removed. Use the `sort` method on
6135 * The `rust` and `rusti` commands have been removed, due to lack of
6137 * `rustdoc` was completely rewritten.
6138 * `rustdoc` can test code examples in documentation.
6139 * `rustpkg` can test packages with the argument, 'test'.
6140 * `rustpkg` supports arbitrary dependencies, including C libraries.
6141 * `rustc`'s support for generating debug info is improved again.
6142 * `rustc` has better error reporting for unbalanced delimiters.
6143 * `rustc`'s JIT support was removed due to bitrot.
6144 * Executables and static libraries can be built with LTO (-Z lto)
6145 * `rustc` adds a `--dep-info` flag for communicating dependencies to
6149 Version 0.8 (2013-09-26)
6150 ============================
6152 * ~2200 changes, numerous bugfixes
6155 * The `for` loop syntax has changed to work with the `Iterator` trait.
6156 * At long last, unwinding works on Windows.
6157 * Default methods are ready for use.
6158 * Many trait inheritance bugs fixed.
6159 * Owned and borrowed trait objects work more reliably.
6160 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
6161 * rustc can omit emission of code for the `debug!` macro if it is passed
6163 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
6164 for foo.rs, then foo/mod.rs, and will generate an error when both are
6166 * Strings no longer contain trailing nulls. The new `std::c_str` module
6167 provides new mechanisms for converting to C strings.
6168 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
6169 * The FFI has been overhauled such that foreign functions are called directly,
6170 instead of through a stack-switching wrapper.
6171 * Calling a foreign function must be done through a Rust function with the
6172 `#[fixed_stack_segment]` attribute.
6173 * The `externfn!` macro can be used to declare both a foreign function and
6174 a `#[fixed_stack_segment]` wrapper at once.
6175 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
6176 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
6177 * `priv` is disallowed everywhere except for struct fields and enum variants.
6178 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
6179 * `ref` bindings in irrefutable patterns work correctly now.
6180 * `char` is now prevented from containing invalid code points.
6181 * Casting to `bool` is no longer allowed.
6182 * `\0` is now accepted as an escape in chars and strings.
6183 * `yield` is a reserved keyword.
6184 * `typeof` is a reserved keyword.
6185 * Crates may be imported by URL with `extern mod foo = "url";`.
6186 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
6187 * Static vectors can be initialized with repeating elements,
6188 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
6189 * Static structs can be initialized with functional record update,
6190 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
6191 * `cfg!` can be used to conditionally execute code based on the crate
6192 configuration, similarly to `#[cfg(...)]`.
6193 * The `unnecessary_qualification` lint detects unneeded module
6194 prefixes (default: allow).
6195 * Arithmetic operations have been implemented on the SIMD types in
6196 `std::unstable::simd`.
6197 * Exchange allocation headers were removed, reducing memory usage.
6198 * `format!` implements a completely new, extensible, and higher-performance
6199 string formatting system. It will replace `fmt!`.
6200 * `print!` and `println!` write formatted strings (using the `format!`
6201 extension) to stdout.
6202 * `write!` and `writeln!` write formatted strings (using the `format!`
6203 extension) to the new Writers in `std::rt::io`.
6204 * The library section in which a function or static is placed may
6205 be specified with `#[link_section = "..."]`.
6206 * The `proto!` syntax extension for defining bounded message protocols
6208 * `macro_rules!` is hygienic for `let` declarations.
6209 * The `#[export_name]` attribute specifies the name of a symbol.
6210 * `unreachable!` can be used to indicate unreachable code, and fails
6214 * std: Transitioned to the new runtime, written in Rust.
6215 * std: Added an experimental I/O library, `rt::io`, based on the new
6217 * std: A new generic `range` function was added to the prelude, replacing
6218 `uint::range` and friends.
6219 * std: `range_rev` no longer exists. Since range is an iterator it can be
6220 reversed with `range(lo, hi).invert()`.
6221 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
6222 renamed to `unwrap_or`.
6223 * std: The `iterator` module was renamed to `iter`.
6224 * std: Integral types now support the `checked_add`, `checked_sub`, and
6225 `checked_mul` operations for detecting overflow.
6226 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
6228 * std: Methods are standardizing on conventions for casting methods:
6229 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
6231 * std: The `CString` type in `c_str` provides new ways to convert to and
6233 * std: `DoubleEndedIterator` can yield elements in two directions.
6234 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
6236 * std: `str::from_bytes` renamed to `str::from_utf8`.
6237 * std: `pop_opt` and `shift_opt` methods added to vectors.
6238 * std: The task-local data interface no longer uses @, and keys are
6239 no longer function pointers.
6240 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
6241 * std: Added `SharedPort` to `comm`.
6242 * std: `Eq` has a default method for `ne`; only `eq` is required
6244 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
6245 is required in implementations.
6246 * std: `is_utf8` performance is improved, impacting many string functions.
6247 * std: `os::MemoryMap` provides cross-platform mmap.
6248 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
6249 are not 'in-bounds' are considered undefined.
6250 * std: Many freestanding functions in `vec` removed in favor of methods.
6251 * std: Many freestanding functions on scalar types removed in favor of
6253 * std: Many options to task builders were removed since they don't make
6254 sense in the new scheduler design.
6255 * std: More containers implement `FromIterator` so can be created by the
6257 * std: More complete atomic types in `unstable::atomics`.
6258 * std: `comm::PortSet` removed.
6259 * std: Mutating methods in the `Set` and `Map` traits have been moved into
6260 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
6261 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
6262 default implementations.
6263 * std: Various `from_str` functions were removed in favor of a generic
6264 `from_str` which is available in the prelude.
6265 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
6266 * extra: `dlist`, the doubly-linked list was modernized.
6267 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
6268 * extra: Added `glob` module, replacing `std::os::glob`.
6269 * extra: `rope` was removed.
6270 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
6271 * extra: `net`, and `timer` were removed. The experimental replacements
6272 are `std::rt::io::net` and `std::rt::io::timer`.
6273 * extra: Iterators implemented for `SmallIntMap`.
6274 * extra: Iterators implemented for `Bitv` and `BitvSet`.
6275 * extra: `SmallIntSet` removed. Use `BitvSet`.
6276 * extra: Performance of JSON parsing greatly improved.
6277 * extra: `semver` updated to SemVer 2.0.0.
6278 * extra: `term` handles more terminals correctly.
6279 * extra: `dbg` module removed.
6280 * extra: `par` module removed.
6281 * extra: `future` was cleaned up, with some method renames.
6282 * extra: Most free functions in `getopts` were converted to methods.
6285 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
6286 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
6287 similarly to gcc's `--march` flag.
6288 * rustc's performance compiling small crates is much better.
6289 * rustpkg has received many improvements.
6290 * rustpkg supports git tags as package IDs.
6291 * rustpkg builds into target-specific directories so it can be used for
6293 * The number of concurrent test tasks is controlled by the environment
6294 variable RUST_TEST_TASKS.
6295 * The test harness can now report metrics for benchmarks.
6296 * All tools have man pages.
6297 * Programs compiled with `--test` now support the `-h` and `--help` flags.
6298 * The runtime uses jemalloc for allocations.
6299 * Segmented stacks are temporarily disabled as part of the transition to
6300 the new runtime. Stack overflows are possible!
6301 * A new documentation backend, rustdoc_ng, is available for use. It is
6302 still invoked through the normal `rustdoc` command.
6305 Version 0.7 (2013-07-03)
6306 =======================
6308 * ~2000 changes, numerous bugfixes
6311 * `impl`s no longer accept a visibility qualifier. Put them on methods
6313 * The borrow checker has been rewritten with flow-sensitivity, fixing
6314 many bugs and inconveniences.
6315 * The `self` parameter no longer implicitly means `&'self self`,
6316 and can be explicitly marked with a lifetime.
6317 * Overloadable compound operators (`+=`, etc.) have been temporarily
6318 removed due to bugs.
6319 * The `for` loop protocol now requires `for`-iterators to return `bool`
6320 so they compose better.
6321 * The `Durable` trait is replaced with the `'static` bounds.
6322 * Trait default methods work more often.
6323 * Structs with the `#[packed]` attribute have byte alignment and
6324 no padding between fields.
6325 * Type parameters bound by `Copy` must now be copied explicitly with
6327 * It is now illegal to move out of a dereferenced unsafe pointer.
6328 * `Option<~T>` is now represented as a nullable pointer.
6329 * `@mut` does dynamic borrow checks correctly.
6330 * The `main` function is only detected at the topmost level of the crate.
6331 The `#[main]` attribute is still valid anywhere.
6332 * Struct fields may no longer be mutable. Use inherited mutability.
6333 * The `#[no_send]` attribute makes a type that would otherwise be
6335 * The `#[no_freeze]` attribute makes a type that would otherwise be
6337 * Unbounded recursion will abort the process after reaching the limit
6338 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
6339 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
6340 are never implicitly copyable.
6341 * `#[static_assert]` makes compile-time assertions about static bools.
6342 * At long last, 'argument modes' no longer exist.
6343 * The rarely used `use mod` statement no longer exists.
6346 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
6348 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
6349 `Rand`, `Zero` and `ToStr` can all be automatically derived with
6351 * The `bytes!` macro returns a vector of bytes for string, u8, char,
6352 and unsuffixed integer literals.
6355 * The `core` crate was renamed to `std`.
6356 * The `std` crate was renamed to `extra`.
6357 * More and improved documentation.
6358 * std: `iterator` module for external iterator objects.
6359 * Many old-style (internal, higher-order function) iterators replaced by
6360 implementations of `Iterator`.
6361 * std: Many old internal vector and string iterators,
6362 incl. `any`, `all`. removed.
6363 * std: The `finalize` method of `Drop` renamed to `drop`.
6364 * std: The `drop` method now takes `&mut self` instead of `&self`.
6365 * std: The prelude no longer re-exports any modules, only types and traits.
6366 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
6367 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
6368 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
6369 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
6370 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
6371 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
6372 * std: Many types implement `Clone`.
6373 * std: `path` type renamed to `Path`.
6374 * std: `mut` module and `Mut` type removed.
6375 * std: Many standalone functions removed in favor of methods and iterators
6376 in `vec`, `str`. In the future methods will also work as functions.
6377 * std: `reinterpret_cast` removed. Use `transmute`.
6378 * std: ascii string handling in `std::ascii`.
6379 * std: `Rand` is implemented for ~/@.
6380 * std: `run` module for spawning processes overhauled.
6381 * std: Various atomic types added to `unstable::atomic`.
6382 * std: Various types implement `Zero`.
6383 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
6384 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
6385 * std: Added `os::mkdir_recursive`.
6386 * std: Added `os::glob` function performs filesystems globs.
6387 * std: `FuzzyEq` renamed to `ApproxEq`.
6388 * std: `Map` now defines `pop` and `swap` methods.
6389 * std: `Cell` constructors converted to static methods.
6390 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
6391 * extra: `flate` module moved from `std` to `extra`.
6392 * extra: `fileinput` module for iterating over a series of files.
6393 * extra: `Complex` number type and `complex` module.
6394 * extra: `Rational` number type and `rational` module.
6395 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
6396 * extra: `term` uses terminfo now, is more correct.
6397 * extra: `arc` functions converted to methods.
6398 * extra: Implementation of fixed output size variations of SHA-2.
6401 * `unused_variable` lint mode for unused variables (default: warn).
6402 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
6404 * `unused_mut` lint mode for identifying unused `mut` qualifiers
6406 * `dead_assignment` lint mode for unread variables (default: warn).
6407 * `unnecessary_allocation` lint mode detects some heap allocations that are
6408 immediately borrowed so could be written without allocating (default: warn).
6409 * `missing_doc` lint mode (default: allow).
6410 * `unreachable_code` lint mode (default: warn).
6411 * The `rusti` command has been rewritten and a number of bugs addressed.
6412 * rustc outputs in color on more terminals.
6413 * rustc accepts a `--link-args` flag to pass arguments to the linker.
6414 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
6415 * Compiling with `-g` will make the binary record information about
6416 dynamic borrowcheck failures for debugging.
6417 * rustdoc has a nicer stylesheet.
6418 * Various improvements to rustdoc.
6419 * Improvements to rustpkg (see the detailed release notes).
6422 Version 0.6 (2013-04-03)
6423 ========================
6425 * ~2100 changes, numerous bugfixes
6428 * The self type parameter in traits is now spelled `Self`
6429 * The `self` parameter in trait and impl methods must now be explicitly
6430 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
6431 * Static methods no longer require the `static` keyword and instead
6432 are distinguished by the lack of a `self` parameter
6433 * Replaced the `Durable` trait with the `'static` lifetime
6434 * The old closure type syntax with the trailing sigil has been
6435 removed in favor of the more consistent leading sigil
6436 * `super` is a keyword, and may be prefixed to paths
6437 * Trait bounds are separated with `+` instead of whitespace
6438 * Traits are implemented with `impl Trait for Type`
6439 instead of `impl Type: Trait`
6440 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
6441 * The `export` keyword has finally been removed
6442 * The `move` keyword has been removed (see "Semantic changes")
6443 * The interior mutability qualifier on vectors, `[mut T]`, has been
6444 removed. Use `&mut [T]`, etc.
6445 * `mut` is no longer valid in `~mut T`. Use inherited mutability
6446 * `fail` is no longer a keyword. Use `fail!()`
6447 * `assert` is no longer a keyword. Use `assert!()`
6448 * `log` is no longer a keyword. use `debug!`, etc.
6449 * 1-tuples may be represented as `(T,)`
6450 * Struct fields may no longer be `mut`. Use inherited mutability,
6451 `@mut T`, `core::mut` or `core::cell`
6452 * `extern mod { ... }` is no longer valid syntax for foreign
6453 function modules. Use extern blocks: `extern { ... }`
6454 * Newtype enums removed. Use tuple-structs.
6455 * Trait implementations no longer support visibility modifiers
6456 * Pattern matching over vectors improved and expanded
6457 * `const` renamed to `static` to correspond to lifetime name,
6458 and make room for future `static mut` unsafe mutable globals.
6459 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
6460 * `Clone` implementations can be automatically generated with
6461 `#[deriving(Clone)]`
6462 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
6463 instead of `foo as Bar`.
6464 * Fixed length vector types are now written as `[int, .. 3]`
6465 instead of `[int * 3]`.
6466 * Fixed length vector types can express the length as a constant
6467 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
6470 * Types with owned pointers or custom destructors move by default,
6471 eliminating the `move` keyword
6472 * All foreign functions are considered unsafe
6473 * &mut is now unaliasable
6474 * Writes to borrowed @mut pointers are prevented dynamically
6476 * The name of the main function can be customized using #[main]
6477 * The default type of an inferred closure is &fn instead of @fn
6478 * `use` statements may no longer be "chained" - they cannot import
6479 identifiers imported by previous `use` statements
6480 * `use` statements are crate relative, importing from the "top"
6481 of the crate by default. Paths may be prefixed with `super::`
6482 or `self::` to change the search behavior.
6483 * Method visibility is inherited from the implementation declaration
6484 * Structural records have been removed
6485 * Many more types can be used in static items, including enums
6486 'static-lifetime pointers and vectors
6487 * Pattern matching over vectors improved and expanded
6488 * Typechecking of closure types has been overhauled to
6489 improve inference and eliminate unsoundness
6490 * Macros leave scope at the end of modules, unless that module is
6491 tagged with #[macro_escape]
6494 * Added big integers to `std::bigint`
6495 * Removed `core::oldcomm` module
6496 * Added pipe-based `core::comm` module
6497 * Numeric traits have been reorganized under `core::num`
6498 * `vec::slice` finally returns a slice
6499 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
6500 * Containers reorganized around traits in `core::container`
6501 * `core::dvec` removed, `~[T]` is a drop-in replacement
6502 * `core::send_map` renamed to `core::hashmap`
6503 * `std::map` removed; replaced with `core::hashmap`
6504 * `std::treemap` reimplemented as an owned balanced tree
6505 * `std::deque` and `std::smallintmap` reimplemented as owned containers
6506 * `core::trie` added as a fast ordered map for integer keys
6507 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
6508 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
6509 overload the comparison operators, whereas `TotalOrd` is used
6510 by certain container types
6513 * Replaced the 'cargo' package manager with 'rustpkg'
6514 * Added all-purpose 'rust' tool
6515 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
6516 * rustc now *attempts* to offer spelling suggestions
6517 * Improved support for ARM and Android
6518 * Preliminary MIPS backend
6519 * Improved foreign function ABI implementation for x86, x86_64
6520 * Various memory usage improvements
6521 * Rust code may be embedded in foreign code under limited circumstances
6522 * Inline assembler supported by new asm!() syntax extension.
6525 Version 0.5 (2012-12-21)
6526 ===========================
6528 * ~900 changes, numerous bugfixes
6531 * Removed `<-` move operator
6532 * Completed the transition from the `#fmt` extension syntax to `fmt!`
6533 * Removed old fixed length vector syntax - `[T]/N`
6534 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
6535 * Macros may now expand to items and statements
6536 * `a.b()` is always parsed as a method call, never as a field projection
6537 * `Eq` and `IterBytes` implementations can be automatically generated
6538 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
6539 * Removed the special crate language for `.rc` files
6540 * Function arguments may consist of any irrefutable pattern
6543 * `&` and `~` pointers may point to objects
6544 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
6545 * Enum variants may be structs
6546 * Destructors can be added to all nominal types with the Drop trait
6547 * Structs and nullary enum variants may be constants
6548 * Values that cannot be implicitly copied are now automatically moved
6549 without writing `move` explicitly
6550 * `&T` may now be coerced to `*T`
6551 * Coercions happen in `let` statements as well as function calls
6552 * `use` statements now take crate-relative paths
6553 * The module and type namespaces have been merged so that static
6554 method names can be resolved under the trait in which they are
6557 * Improved support for language features
6558 * Trait inheritance works in many scenarios
6559 * More support for explicit self arguments in methods - `self`, `&self`
6560 `@self`, and `~self` all generally work as expected
6561 * Static methods work in more situations
6562 * Experimental: Traits may declare default methods for the implementations
6566 * New condition handling system in `core::condition`
6567 * Timsort added to `std::sort`
6568 * New priority queue, `std::priority_queue`
6569 * Pipes for serializable types, `std::flatpipes'
6570 * Serialization overhauled to be trait-based
6571 * Expanded `getopts` definitions
6572 * Moved futures to `std`
6573 * More functions are pure now
6574 * `core::comm` renamed to `oldcomm`. Still deprecated
6575 * `rustdoc` and `cargo` are libraries now
6578 * Added a preliminary REPL, `rusti`
6579 * License changed from MIT to dual MIT/APL2
6582 Version 0.4 (2012-10-15)
6583 ==========================
6585 * ~2000 changes, numerous bugfixes
6588 * All keywords are now strict and may not be used as identifiers anywhere
6589 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
6590 'of', 'with', 'to', 'class'.
6591 * Classes are replaced with simpler structs
6592 * Explicit method self types
6593 * `ret` became `return` and `alt` became `match`
6594 * `import` is now `use`; `use is now `extern mod`
6595 * `extern mod { ... }` is now `extern { ... }`
6596 * `use mod` is the recommended way to import modules
6597 * `pub` and `priv` replace deprecated export lists
6598 * The syntax of `match` pattern arms now uses fat arrow (=>)
6599 * `main` no longer accepts an args vector; use `os::args` instead
6602 * Trait implementations are now coherent, ala Haskell typeclasses
6603 * Trait methods may be static
6604 * Argument modes are deprecated
6605 * Borrowed pointers are much more mature and recommended for use
6606 * Strings and vectors in the static region are stored in constant memory
6607 * Typestate was removed
6608 * Resolution rewritten to be more reliable
6609 * Support for 'dual-mode' data structures (freezing and thawing)
6612 * Most binary operators can now be overloaded via the traits in
6614 * `std::net::url` for representing URLs
6615 * Sendable hash maps in `core::send_map`
6616 * `core::task' gained a (currently unsafe) task-local storage API
6619 * An efficient new intertask communication primitive called the pipe,
6620 along with a number of higher-level channel types, in `core::pipes`
6621 * `std::arc`, an atomically reference counted, immutable, shared memory
6623 * `std::sync`, various exotic synchronization tools based on arcs and pipes
6624 * Futures are now based on pipes and sendable
6625 * More robust linked task failure
6626 * Improved task builder API
6629 * Improved error reporting
6630 * Preliminary JIT support
6631 * Preliminary work on precise GC
6632 * Extensive architectural improvements to rustc
6633 * Begun a transition away from buggy C++-based reflection (shape) code to
6634 Rust-based (visitor) code
6635 * All hash functions and tables converted to secure, randomized SipHash
6638 Version 0.3 (2012-07-12)
6639 ========================
6641 * ~1900 changes, numerous bugfixes
6643 * New coding conveniences
6644 * Integer-literal suffix inference
6645 * Per-item control over warnings, errors
6646 * #[cfg(windows)] and #[cfg(unix)] attributes
6647 * Documentation comments
6648 * More compact closure syntax
6649 * 'do' expressions for treating higher-order functions as
6651 * *-patterns (wildcard extended to all constructor fields)
6654 * Name resolution pass and exhaustiveness checker rewritten
6655 * Region pointers and borrow checking supersede alias
6657 * Init-ness checking is now provided by a region-based liveness
6658 pass instead of the typestate pass; same for last-use analysis
6659 * Extensive work on region pointers
6661 * Experimental new language features
6662 * Slices and fixed-size, interior-allocated vectors
6663 * #!-comments for lang versioning, shell execution
6664 * Destructors and iface implementation for classes;
6665 type-parameterized classes and class methods
6666 * 'const' type kind for types that can be used to implement
6667 shared-memory concurrency patterns
6671 * Removal of various obsolete features
6672 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
6673 'crust', 'native' (now 'extern'), 'cont' (now 'again')
6675 * Constructs: do-while loops ('do' repurposed), fn binding,
6676 resources (replaced by destructors)
6678 * Compiler reorganization
6679 * Syntax-layer of compiler split into separate crate
6680 * Clang (from LLVM project) integrated into build
6681 * Typechecker split into sub-modules
6684 * New time functions
6685 * Extension methods for many built-in types
6686 * Arc: atomic-refcount read-only / exclusive-use shared cells
6687 * Par: parallel map and search routines
6688 * Extensive work on libuv interface
6689 * Much vector code moved to libraries
6690 * Syntax extensions: #line, #col, #file, #mod, #stringify,
6691 #include, #include_str, #include_bin
6694 * Cargo automatically resolves dependencies
6697 Version 0.2 (2012-03-29)
6698 =========================
6700 * >1500 changes, numerous bugfixes
6702 * New docs and doc tooling
6704 * New port: FreeBSD x86_64
6706 * Compilation model enhancements
6707 * Generics now specialized, multiply instantiated
6708 * Functions now inlined across separate crates
6710 * Scheduling, stack and threading fixes
6711 * Noticeably improved message-passing performance
6712 * Explicit schedulers
6716 * Experimental new language features
6717 * Operator overloading
6721 * Various language extensions
6722 * C-callback function types: 'crust fn ...'
6723 * Infinite-loop construct: 'loop { ... }'
6724 * Shorten 'mutable' to 'mut'
6725 * Required mutable-local qualifier: 'let mut ...'
6726 * Basic glob-exporting: 'export foo::*;'
6727 * Alt now exhaustive, 'alt check' for runtime-checked
6728 * Block-function form of 'for' loop, with 'break' and 'ret'.
6731 * AST quasi-quote syntax extension
6732 * Revived libuv interface
6733 * New modules: core::{future, iter}, std::arena
6734 * Merged per-platform std::{os*, fs*} to core::{libc, os}
6735 * Extensive cleanup, regularization in libstd, libcore
6738 Version 0.1 (2012-01-20)
6739 ===============================
6741 * Most language features work, including:
6742 * Unique pointers, unique closures, move semantics
6743 * Interface-constrained generics
6744 * Static interface dispatch
6746 * Multithread task scheduling
6747 * Typestate predicates
6748 * Failure unwinding, destructors
6749 * Pattern matching and destructuring assignment
6750 * Lightweight block-lambda syntax
6751 * Preliminary macro-by-example
6753 * Compiler works with the following configurations:
6754 * Linux: x86 and x86_64 hosts and targets
6755 * macOS: x86 and x86_64 hosts and targets
6756 * Windows: x86 hosts and targets
6758 * Cross compilation / multi-target configuration supported.
6760 * Preliminary API-documentation and package-management tools included.
6764 * Documentation is incomplete.
6766 * Performance is below intended target.
6768 * Standard library APIs are subject to extensive change, reorganization.
6770 * Language-level versioning is not yet operational - future code will