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]
37 - [`rustdoc` now has the `--cap-lints` option which demotes all lints above
38 the specified level to that level.][52354] For example `--cap-lints warn`
39 will demote `deny` and `forbid` lints to `warn`.
40 - [`rustc` and `rustdoc` will now have the exit code of `1` if compilation
41 fails, and `101` if there is a panic.][52197]
42 - [A preview of clippy has been made available through rustup.][51122]
43 You can install the preview with `rustup component add clippy-preview`
47 - [`str::{slice_unchecked, slice_unchecked_mut}` are now deprecated.][51807]
48 Use `str::get_unchecked(begin..end)` instead.
49 - [`std::env::home_dir` is now deprecated for its unintuitive behaviour.][51656]
50 Consider using the `home_dir` function from
51 https://crates.io/crates/dirs instead.
52 - [`rustc` will no longer silently ignore invalid data in target spec.][52330]
54 [52861]: https://github.com/rust-lang/rust/pull/52861/
55 [52656]: https://github.com/rust-lang/rust/pull/52656/
56 [52239]: https://github.com/rust-lang/rust/pull/52239/
57 [52330]: https://github.com/rust-lang/rust/pull/52330/
58 [52354]: https://github.com/rust-lang/rust/pull/52354/
59 [52402]: https://github.com/rust-lang/rust/pull/52402/
60 [52103]: https://github.com/rust-lang/rust/pull/52103/
61 [52197]: https://github.com/rust-lang/rust/pull/52197/
62 [51807]: https://github.com/rust-lang/rust/pull/51807/
63 [51899]: https://github.com/rust-lang/rust/pull/51899/
64 [51912]: https://github.com/rust-lang/rust/pull/51912/
65 [51511]: https://github.com/rust-lang/rust/pull/51511/
66 [51619]: https://github.com/rust-lang/rust/pull/51619/
67 [51656]: https://github.com/rust-lang/rust/pull/51656/
68 [51178]: https://github.com/rust-lang/rust/pull/51178/
69 [51122]: https://github.com/rust-lang/rust/pull/51122
70 [50494]: https://github.com/rust-lang/rust/pull/50494/
71 [cargo/5614]: https://github.com/rust-lang/cargo/pull/5614/
72 [cargo/5723]: https://github.com/rust-lang/cargo/pull/5723/
73 [cargo/5831]: https://github.com/rust-lang/cargo/pull/5831/
74 [`Arc::downcast`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.downcast
75 [`Iterator::flatten`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.flatten
76 [`Rc::downcast`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.downcast
79 Version 1.28.0 (2018-08-02)
80 ===========================
84 - [The `#[repr(transparent)]` attribute is now stable.][51562] This attribute
85 allows a Rust newtype wrapper (`struct NewType<T>(T);`) to be represented as
86 the inner type across Foreign Function Interface (FFI) boundaries.
87 - [The keywords `pure`, `sizeof`, `alignof`, and `offsetof` have been unreserved
88 and can now be used as identifiers.][51196]
89 - [The `GlobalAlloc` trait and `#[global_allocator]` attribute are now
90 stable.][51241] This will allow users to specify a global allocator for
92 - [Unit test functions marked with the `#[test]` attribute can now return
93 `Result<(), E: Debug>` in addition to `()`.][51298]
94 - [The `lifetime` specifier for `macro_rules!` is now stable.][50385] This
95 allows macros to easily target lifetimes.
99 - [The `s` and `z` optimisation levels are now stable.][50265] These optimisations
100 prioritise making smaller binary sizes. `z` is the same as `s` with the
101 exception that it does not vectorise loops, which typically results in an even
103 - [The short error format is now stable.][49546] Specified with
104 `--error-format=short` this option will provide a more compressed output of
106 - [Added a lint warning when you have duplicated `macro_export`s.][50143]
107 - [Reduced the number of allocations in the macro parser.][50855] This can
108 improve compile times of macro heavy crates on average by 5%.
112 - [Implemented `Default` for `&mut str`.][51306]
113 - [Implemented `From<bool>` for all integer and unsigned number types.][50554]
114 - [Implemented `Extend` for `()`.][50234]
115 - [The `Debug` implementation of `time::Duration` should now be more easily
116 human readable.][50364] Previously a `Duration` of one second would printed as
117 `Duration { secs: 1, nanos: 0 }` and will now be printed as `1s`.
118 - [Implemented `From<&String>` for `Cow<str>`, `From<&Vec<T>>` for `Cow<[T]>`,
119 `From<Cow<CStr>>` for `CString`, `From<CString>, From<CStr>, From<&CString>`
120 for `Cow<CStr>`, `From<OsString>, From<OsStr>, From<&OsString>` for
121 `Cow<OsStr>`, `From<&PathBuf>` for `Cow<Path>`, and `From<Cow<Path>>`
122 for `PathBuf`.][50170]
123 - [Implemented `Shl` and `Shr` for `Wrapping<u128>`
124 and `Wrapping<i128>`.][50465]
125 - [`DirEntry::metadata` now uses `fstatat` instead of `lstat` when
126 possible.][51050] This can provide up to a 40% speed increase.
127 - [Improved error messages when using `format!`.][50610]
131 - [`Iterator::step_by`]
132 - [`Path::ancestors`]
133 - [`SystemTime::UNIX_EPOCH`]
134 - [`alloc::GlobalAlloc`]
136 - [`alloc::LayoutErr`]
139 - [`alloc::alloc_zeroed`]
142 - [`alloc::handle_alloc_error`]
143 - [`btree_map::Entry::or_default`]
145 - [`hash_map::Entry::or_default`]
146 - [`iter::repeat_with`]
147 - [`num::NonZeroUsize`]
148 - [`num::NonZeroU128`]
149 - [`num::NonZeroU16`]
150 - [`num::NonZeroU32`]
151 - [`num::NonZeroU64`]
153 - [`ops::RangeBounds`]
154 - [`slice::SliceIndex`]
155 - [`slice::from_mut`]
156 - [`slice::from_ref`]
157 - [`{Any + Send + Sync}::downcast_mut`]
158 - [`{Any + Send + Sync}::downcast_ref`]
159 - [`{Any + Send + Sync}::is`]
163 - [Cargo will now no longer allow you to publish crates with build scripts that
164 modify the `src` directory.][cargo/5584] The `src` directory in a crate should be
165 considered to be immutable.
169 - [The `suggestion_applicability` field in `rustc`'s json output is now
170 stable.][50486] This will allow dev tools to check whether a code suggestion
175 - [Rust will consider trait objects with duplicated constraints to be the same
176 type as without the duplicated constraint.][51276] For example the below code will
182 fn test(&self) { println!("one"); } //~ ERROR duplicate definitions with name `test`
185 impl Trait + Send + Send {
186 fn test(&self) { println!("two"); }
190 [49546]: https://github.com/rust-lang/rust/pull/49546/
191 [50143]: https://github.com/rust-lang/rust/pull/50143/
192 [50170]: https://github.com/rust-lang/rust/pull/50170/
193 [50234]: https://github.com/rust-lang/rust/pull/50234/
194 [50265]: https://github.com/rust-lang/rust/pull/50265/
195 [50364]: https://github.com/rust-lang/rust/pull/50364/
196 [50385]: https://github.com/rust-lang/rust/pull/50385/
197 [50465]: https://github.com/rust-lang/rust/pull/50465/
198 [50486]: https://github.com/rust-lang/rust/pull/50486/
199 [50554]: https://github.com/rust-lang/rust/pull/50554/
200 [50610]: https://github.com/rust-lang/rust/pull/50610/
201 [50855]: https://github.com/rust-lang/rust/pull/50855/
202 [51050]: https://github.com/rust-lang/rust/pull/51050/
203 [51196]: https://github.com/rust-lang/rust/pull/51196/
204 [51200]: https://github.com/rust-lang/rust/pull/51200/
205 [51241]: https://github.com/rust-lang/rust/pull/51241/
206 [51276]: https://github.com/rust-lang/rust/pull/51276/
207 [51298]: https://github.com/rust-lang/rust/pull/51298/
208 [51306]: https://github.com/rust-lang/rust/pull/51306/
209 [51562]: https://github.com/rust-lang/rust/pull/51562/
210 [cargo/5584]: https://github.com/rust-lang/cargo/pull/5584/
211 [`Iterator::step_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.step_by
212 [`Path::ancestors`]: https://doc.rust-lang.org/std/path/struct.Path.html#method.ancestors
213 [`SystemTime::UNIX_EPOCH`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#associatedconstant.UNIX_EPOCH
214 [`alloc::GlobalAlloc`]: https://doc.rust-lang.org/std/alloc/trait.GlobalAlloc.html
215 [`alloc::Layout`]: https://doc.rust-lang.org/std/alloc/struct.Layout.html
216 [`alloc::LayoutErr`]: https://doc.rust-lang.org/std/alloc/struct.LayoutErr.html
217 [`alloc::System`]: https://doc.rust-lang.org/std/alloc/struct.System.html
218 [`alloc::alloc`]: https://doc.rust-lang.org/std/alloc/fn.alloc.html
219 [`alloc::alloc_zeroed`]: https://doc.rust-lang.org/std/alloc/fn.alloc_zeroed.html
220 [`alloc::dealloc`]: https://doc.rust-lang.org/std/alloc/fn.dealloc.html
221 [`alloc::realloc`]: https://doc.rust-lang.org/std/alloc/fn.realloc.html
222 [`alloc::handle_alloc_error`]: https://doc.rust-lang.org/std/alloc/fn.handle_alloc_error.html
223 [`btree_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.or_default
224 [`fmt::Alignment`]: https://doc.rust-lang.org/std/fmt/enum.Alignment.html
225 [`hash_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.or_default
226 [`iter::repeat_with`]: https://doc.rust-lang.org/std/iter/fn.repeat_with.html
227 [`num::NonZeroUsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroUsize.html
228 [`num::NonZeroU128`]: https://doc.rust-lang.org/std/num/struct.NonZeroU128.html
229 [`num::NonZeroU16`]: https://doc.rust-lang.org/std/num/struct.NonZeroU16.html
230 [`num::NonZeroU32`]: https://doc.rust-lang.org/std/num/struct.NonZeroU32.html
231 [`num::NonZeroU64`]: https://doc.rust-lang.org/std/num/struct.NonZeroU64.html
232 [`num::NonZeroU8`]: https://doc.rust-lang.org/std/num/struct.NonZeroU8.html
233 [`ops::RangeBounds`]: https://doc.rust-lang.org/std/ops/trait.RangeBounds.html
234 [`slice::SliceIndex`]: https://doc.rust-lang.org/std/slice/trait.SliceIndex.html
235 [`slice::from_mut`]: https://doc.rust-lang.org/std/slice/fn.from_mut.html
236 [`slice::from_ref`]: https://doc.rust-lang.org/std/slice/fn.from_ref.html
237 [`{Any + Send + Sync}::downcast_mut`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_mut-2
238 [`{Any + Send + Sync}::downcast_ref`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_ref-2
239 [`{Any + Send + Sync}::is`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.is-2
241 Version 1.27.2 (2018-07-20)
242 ===========================
247 - The borrow checker was fixed to avoid potential unsoundness when using
248 match ergonomics: [#52213][52213].
250 [52213]: https://github.com/rust-lang/rust/issues/52213
252 Version 1.27.1 (2018-07-10)
253 ===========================
258 - rustdoc would execute plugins in the /tmp/rustdoc/plugins directory
259 when running, which enabled executing code as some other user on a
260 given machine. This release fixes that vulnerability; you can read
261 more about this on the [blog][rustdoc-sec]. The associated CVE is [CVE-2018-1000622].
263 Thank you to Red Hat for responsibily disclosing this vulnerability to us.
268 - The borrow checker was fixed to avoid an additional potential unsoundness when using
269 match ergonomics: [#51415][51415], [#49534][49534].
271 [51415]: https://github.com/rust-lang/rust/issues/51415
272 [49534]: https://github.com/rust-lang/rust/issues/49534
273 [rustdoc-sec]: https://blog.rust-lang.org/2018/07/06/security-advisory-for-rustdoc.html
274 [CVE-2018-1000622]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=%20CVE-2018-1000622
276 Version 1.27.0 (2018-06-21)
277 ==========================
281 - [Removed 'proc' from the reserved keywords list.][49699] This allows `proc` to
282 be used as an identifier.
283 - [The dyn syntax is now available.][49968] This syntax is equivalent to the
284 bare `Trait` syntax, and should make it clearer when being used in tandem with
285 `impl Trait`. Since it is equivalent to the following syntax:
286 `&Trait == &dyn Trait`, `&mut Trait == &mut dyn Trait`, and
287 `Box<Trait> == Box<dyn Trait>`.
288 - [Attributes on generic parameters such as types and lifetimes are
289 now stable.][48851] e.g.
290 `fn foo<#[lifetime_attr] 'a, #[type_attr] T: 'a>() {}`
291 - [The `#[must_use]` attribute can now also be used on functions as well as
292 types.][48925] It provides a lint that by default warns users when the
293 value returned by a function has not been used.
297 - [Added the `armv5te-unknown-linux-musleabi` target.][50423]
301 - [SIMD (Single Instruction Multiple Data) on x86/x86_64 is now stable.][49664]
302 This includes [`arch::x86`] & [`arch::x86_64`] modules which contain
303 SIMD intrinsics, a new macro called `is_x86_feature_detected!`, the
304 `#[target_feature(enable="")]` attribute, and adding `target_feature = ""` to
306 - [A lot of methods for `[u8]`, `f32`, and `f64` previously only available in
307 std are now available in core.][49896]
308 - [The generic `Rhs` type parameter on `ops::{Shl, ShlAssign, Shr}` now defaults
310 - [`std::str::replace` now has the `#[must_use]` attribute][50177] to clarify
311 that the operation isn't done in place.
312 - [`Clone::clone`, `Iterator::collect`, and `ToOwned::to_owned` now have
313 the `#[must_use]` attribute][49533] to warn about unused potentially
314 expensive allocations.
318 - [`DoubleEndedIterator::rfind`]
319 - [`DoubleEndedIterator::rfold`]
320 - [`DoubleEndedIterator::try_rfold`]
321 - [`Duration::from_micros`]
322 - [`Duration::from_nanos`]
323 - [`Duration::subsec_micros`]
324 - [`Duration::subsec_millis`]
325 - [`HashMap::remove_entry`]
326 - [`Iterator::try_fold`]
327 - [`Iterator::try_for_each`]
330 - [`String::replace_range`]
331 - [`Take::set_limit`]
332 - [`hint::unreachable_unchecked`]
333 - [`os::unix::process::parent_id`]
334 - [`ptr::swap_nonoverlapping`]
335 - [`slice::rsplit_mut`]
337 - [`slice::swap_with_slice`]
341 - [`cargo-metadata` now includes `authors`, `categories`, `keywords`,
342 `readme`, and `repository` fields.][cargo/5386]
343 - [`cargo-metadata` now includes a package's `metadata` table.][cargo/5360]
344 - [Added the `--target-dir` optional argument.][cargo/5393] This allows you to specify
345 a different directory than `target` for placing compilation artifacts.
346 - [Cargo will be adding automatic target inference for binaries, benchmarks,
347 examples, and tests in the Rust 2018 edition.][cargo/5335] If your project specifies
348 specific targets e.g. using `[[bin]]` and have other binaries in locations
349 where cargo would infer a binary, Cargo will produce a warning. You can
350 disable this feature ahead of time by setting any of the following `autobins`,
351 `autobenches`, `autoexamples`, `autotests` to false.
352 - [Cargo will now cache compiler information.][cargo/5359] This can be disabled by
353 setting `CARGO_CACHE_RUSTC_INFO=0` in your environment.
357 - [Added “The Rustc book” into the official documentation.][49707]
358 [“The Rustc book”] documents and teaches how to use the rustc compiler.
359 - [All books available on `doc.rust-lang.org` are now searchable.][49623]
363 - [Calling a `CharExt` or `StrExt` method directly on core will no longer
364 work.][49896] e.g. `::core::prelude::v1::StrExt::is_empty("")` will not
365 compile, `"".is_empty()` will still compile.
366 - [`Debug` output on `atomic::{AtomicBool, AtomicIsize, AtomicPtr, AtomicUsize}`
367 will only print the inner type.][48553] e.g.
368 `print!("{:?}", AtomicBool::new(true))` will print `true`
369 not `AtomicBool(true)`.
370 - [The maximum number for `repr(align(N))` is now 2²⁹.][50378] Previously you
371 could enter higher numbers but they were not supported by LLVM. Up to 512MB
372 alignment should cover all use cases.
374 [48553]: https://github.com/rust-lang/rust/pull/48553/
375 [48851]: https://github.com/rust-lang/rust/pull/48851/
376 [48925]: https://github.com/rust-lang/rust/pull/48925/
377 [49533]: https://github.com/rust-lang/rust/pull/49533/
378 [49623]: https://github.com/rust-lang/rust/pull/49623/
379 [49630]: https://github.com/rust-lang/rust/pull/49630/
380 [49664]: https://github.com/rust-lang/rust/pull/49664/
381 [49699]: https://github.com/rust-lang/rust/pull/49699/
382 [49707]: https://github.com/rust-lang/rust/pull/49707/
383 [49719]: https://github.com/rust-lang/rust/pull/49719/
384 [49896]: https://github.com/rust-lang/rust/pull/49896/
385 [49968]: https://github.com/rust-lang/rust/pull/49968/
386 [50177]: https://github.com/rust-lang/rust/pull/50177/
387 [50378]: https://github.com/rust-lang/rust/pull/50378/
388 [50398]: https://github.com/rust-lang/rust/pull/50398/
389 [50423]: https://github.com/rust-lang/rust/pull/50423/
390 [cargo/5203]: https://github.com/rust-lang/cargo/pull/5203/
391 [cargo/5335]: https://github.com/rust-lang/cargo/pull/5335/
392 [cargo/5359]: https://github.com/rust-lang/cargo/pull/5359/
393 [cargo/5360]: https://github.com/rust-lang/cargo/pull/5360/
394 [cargo/5386]: https://github.com/rust-lang/cargo/pull/5386/
395 [cargo/5393]: https://github.com/rust-lang/cargo/pull/5393/
396 [`DoubleEndedIterator::rfind`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfind
397 [`DoubleEndedIterator::rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfold
398 [`DoubleEndedIterator::try_rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.try_rfold
399 [`Duration::from_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_micros
400 [`Duration::from_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_nanos
401 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
402 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
403 [`HashMap::remove_entry`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.remove_entry
404 [`Iterator::try_fold`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_fold
405 [`Iterator::try_for_each`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_for_each
406 [`NonNull::cast`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.cast
407 [`Option::filter`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.filter
408 [`String::replace_range`]: https://doc.rust-lang.org/std/string/struct.String.html#method.replace_range
409 [`Take::set_limit`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.set_limit
410 [`hint::unreachable_unchecked`]: https://doc.rust-lang.org/std/hint/fn.unreachable_unchecked.html
411 [`os::unix::process::parent_id`]: https://doc.rust-lang.org/std/os/unix/process/fn.parent_id.html
412 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
413 [`ptr::swap_nonoverlapping`]: https://doc.rust-lang.org/std/ptr/fn.swap_nonoverlapping.html
414 [`slice::rsplit_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit_mut
415 [`slice::rsplit`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit
416 [`slice::swap_with_slice`]: https://doc.rust-lang.org/std/primitive.slice.html#method.swap_with_slice
417 [`arch::x86_64`]: https://doc.rust-lang.org/std/arch/x86_64/index.html
418 [`arch::x86`]: https://doc.rust-lang.org/std/arch/x86/index.html
419 [“The Rustc book”]: https://doc.rust-lang.org/rustc
422 Version 1.26.2 (2018-06-05)
423 ==========================
428 - [The borrow checker was fixed to avoid unsoundness when using match ergonomics][51117]
430 [51117]: https://github.com/rust-lang/rust/issues/51117
433 Version 1.26.1 (2018-05-29)
434 ==========================
439 - [RLS now works on Windows][50646]
440 - [Rustfmt stopped badly formatting text in some cases][rustfmt/2695]
446 - [`fn main() -> impl Trait` no longer works for non-Termination
448 This reverts an accidental stabilization.
449 - [`NaN > NaN` no longer returns true in const-fn contexts][50812]
450 - [Prohibit using turbofish for `impl Trait` in method arguments][50950]
452 [50646]: https://github.com/rust-lang/rust/issues/50646
453 [50656]: https://github.com/rust-lang/rust/pull/50656
454 [50812]: https://github.com/rust-lang/rust/pull/50812
455 [50950]: https://github.com/rust-lang/rust/issues/50950
456 [rustfmt/2695]: https://github.com/rust-lang-nursery/rustfmt/issues/2695
458 Version 1.26.0 (2018-05-10)
459 ==========================
463 - [Closures now implement `Copy` and/or `Clone` if all captured variables
464 implement either or both traits.][49299]
465 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
466 - [The `'_` lifetime is now stable. The underscore lifetime can be used anywhere where a
467 lifetime can be elided.][49458]
468 - [`impl Trait` is now stable allowing you to have abstract types in returns
469 or in function parameters.][49255] e.g. `fn foo() -> impl Iterator<Item=u8>` or
470 `fn open(path: impl AsRef<Path>)`.
471 - [Pattern matching will now automatically apply dereferences.][49394]
472 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
473 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
474 - [A lot of operations are now available in a const context.][46882] E.g. You
475 can now index into constant arrays, reference and dereference into constants,
476 and use Tuple struct constructors.
477 - [Fixed entry slice patterns are now stable.][48516] e.g.
479 let points = [1, 2, 3, 4];
481 [1, 2, 3, 4] => println!("All points were sequential."),
482 _ => println!("Not all points were sequential."),
489 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
490 - [Fixed exponential projection complexity on nested types.][48296]
491 This can provide up to a ~12% reduction in compile times for certain crates.
492 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
493 to remap path prefixes outputted by the compiler.
494 - [Added `powerpc-unknown-netbsd` target.][48281]
498 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
499 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
500 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
501 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
502 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
503 - [`ascii::escape_default` is now available in libcore.][48735]
504 - [Trailing commas are now supported in std and core macros.][48056]
505 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
506 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
511 - [`*const T::copy_to_nonoverlapping`]
512 - [`*const T::copy_to`]
513 - [`*const T::read_unaligned`]
514 - [`*const T::read_volatile`]
517 - [`*const T::wrapping_add`]
518 - [`*const T::wrapping_sub`]
520 - [`*mut T::copy_to_nonoverlapping`]
521 - [`*mut T::copy_to`]
522 - [`*mut T::read_unaligned`]
523 - [`*mut T::read_volatile`]
525 - [`*mut T::replace`]
528 - [`*mut T::wrapping_add`]
529 - [`*mut T::wrapping_sub`]
530 - [`*mut T::write_bytes`]
531 - [`*mut T::write_unaligned`]
532 - [`*mut T::write_volatile`]
535 - [`FromUtf8Error::as_bytes`]
536 - [`LocalKey::try_with`]
538 - [`btree_map::Entry::and_modify`]
539 - [`fs::read_to_string`]
542 - [`hash_map::Entry::and_modify`]
543 - [`iter::FusedIterator`]
544 - [`ops::RangeInclusive`]
545 - [`ops::RangeToInclusive`]
547 - [`slice::rotate_left`]
548 - [`slice::rotate_right`]
554 - [Cargo will now output path to custom commands when `-v` is
555 passed with `--list`][cargo/5041]
556 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
560 - [The second edition of "The Rust Programming Language" book is now recommended
561 over the first.][48404]
566 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
567 syntax is now invalid.
569 use std::ops::Fn as dyn;
570 fn g(_: Box<dyn(std::fmt::Debug)>) {}
572 - [The result of dereferences are no longer promoted to `'static`.][47408]
576 const PAIR: &(i32, i32) = &(0, 1);
577 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
580 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
581 - [`".e0"` will now no longer parse as `0.0` and will instead cause
583 - [Removed hoedown from rustdoc.][48274]
584 - [Bounds on higher-kinded lifetimes a hard error.][48326]
586 [46882]: https://github.com/rust-lang/rust/pull/46882
587 [47379]: https://github.com/rust-lang/rust/pull/47379
588 [47408]: https://github.com/rust-lang/rust/pull/47408
589 [47813]: https://github.com/rust-lang/rust/pull/47813
590 [48056]: https://github.com/rust-lang/rust/pull/48056
591 [48125]: https://github.com/rust-lang/rust/pull/48125
592 [48166]: https://github.com/rust-lang/rust/pull/48166
593 [48235]: https://github.com/rust-lang/rust/pull/48235
594 [48274]: https://github.com/rust-lang/rust/pull/48274
595 [48281]: https://github.com/rust-lang/rust/pull/48281
596 [48296]: https://github.com/rust-lang/rust/pull/48296
597 [48326]: https://github.com/rust-lang/rust/pull/48326
598 [48359]: https://github.com/rust-lang/rust/pull/48359
599 [48404]: https://github.com/rust-lang/rust/pull/48404
600 [48481]: https://github.com/rust-lang/rust/pull/48481
601 [48516]: https://github.com/rust-lang/rust/pull/48516
602 [48628]: https://github.com/rust-lang/rust/pull/48628
603 [48629]: https://github.com/rust-lang/rust/pull/48629
604 [48657]: https://github.com/rust-lang/rust/pull/48657
605 [48735]: https://github.com/rust-lang/rust/pull/48735
606 [48978]: https://github.com/rust-lang/rust/pull/48978
607 [49101]: https://github.com/rust-lang/rust/pull/49101
608 [49109]: https://github.com/rust-lang/rust/pull/49109
609 [49121]: https://github.com/rust-lang/rust/pull/49121
610 [49162]: https://github.com/rust-lang/rust/pull/49162
611 [49184]: https://github.com/rust-lang/rust/pull/49184
612 [49234]: https://github.com/rust-lang/rust/pull/49234
613 [49255]: https://github.com/rust-lang/rust/pull/49255
614 [49299]: https://github.com/rust-lang/rust/pull/49299
615 [49305]: https://github.com/rust-lang/rust/pull/49305
616 [49394]: https://github.com/rust-lang/rust/pull/49394
617 [49458]: https://github.com/rust-lang/rust/pull/49458
618 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
619 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
620 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
621 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
622 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
623 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
624 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
625 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
626 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
627 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
628 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
629 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
630 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
631 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
632 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
633 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
634 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
635 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
636 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
637 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
638 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
639 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
640 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
641 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
642 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
643 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
644 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
645 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
646 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
647 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
648 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
649 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
650 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
651 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
652 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
653 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
654 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
655 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
656 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
657 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
658 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
659 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
662 Version 1.25.0 (2018-03-29)
663 ==========================
667 - [The `#[repr(align(x))]` attribute is now stable.][47006] [RFC 1358]
668 - [You can now use nested groups of imports.][47948]
669 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
670 - [You can now have `|` at the start of a match arm.][47947] e.g.
678 | Foo::B => println!("AB"),
679 | Foo::C => println!("C"),
686 - [Upgraded to LLVM 6.][47828]
687 - [Added `-C lto=val` option.][47521]
688 - [Added `i586-unknown-linux-musl` target][47282]
692 - [Impl Send for `process::Command` on Unix.][47760]
693 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
694 - [`UnsafeCell::into_inner` is now safe.][47204]
695 - [Implement libstd for CloudABI.][47268]
696 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
697 - [Implement `AsRef<Path>` for Component][46985]
698 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
699 - [Moved `Duration` to libcore.][46666]
703 - [`Location::column`]
706 The following functions can now be used in a constant expression.
707 eg. `static MINUTE: Duration = Duration::from_secs(60);`
708 - [`Duration::new`][47300]
709 - [`Duration::from_secs`][47300]
710 - [`Duration::from_millis`][47300]
714 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
715 - [`cargo new` now defaults to creating a binary crate, instead of a
716 library crate.][cargo/5029]
720 - [Rust by example is now shipped with new releases][46196]
724 - [Deprecated `net::lookup_host`.][47510]
725 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
726 - The borrow checker was sometimes incorrectly permitting overlapping borrows
727 around indexing operations (see [#47349][47349]). This has been fixed (which also
728 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
729 - [Removed deprecated unstable attribute `#[simd]`.][47251]
731 [33903]: https://github.com/rust-lang/rust/pull/33903
732 [47947]: https://github.com/rust-lang/rust/pull/47947
733 [47948]: https://github.com/rust-lang/rust/pull/47948
734 [47760]: https://github.com/rust-lang/rust/pull/47760
735 [47790]: https://github.com/rust-lang/rust/pull/47790
736 [47828]: https://github.com/rust-lang/rust/pull/47828
737 [47398]: https://github.com/rust-lang/rust/pull/47398
738 [47510]: https://github.com/rust-lang/rust/pull/47510
739 [47521]: https://github.com/rust-lang/rust/pull/47521
740 [47204]: https://github.com/rust-lang/rust/pull/47204
741 [47251]: https://github.com/rust-lang/rust/pull/47251
742 [47268]: https://github.com/rust-lang/rust/pull/47268
743 [47282]: https://github.com/rust-lang/rust/pull/47282
744 [47300]: https://github.com/rust-lang/rust/pull/47300
745 [47349]: https://github.com/rust-lang/rust/pull/47349
746 [46931]: https://github.com/rust-lang/rust/pull/46931
747 [46985]: https://github.com/rust-lang/rust/pull/46985
748 [47006]: https://github.com/rust-lang/rust/pull/47006
749 [46830]: https://github.com/rust-lang/rust/pull/46830
750 [46095]: https://github.com/rust-lang/rust/pull/46095
751 [46666]: https://github.com/rust-lang/rust/pull/46666
752 [46196]: https://github.com/rust-lang/rust/pull/46196
753 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
754 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
755 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
756 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
757 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
760 Version 1.24.1 (2018-03-01)
761 ==========================
763 - [Do not abort when unwinding through FFI][48251]
764 - [Emit UTF-16 files for linker arguments on Windows][48318]
765 - [Make the error index generator work again][48308]
766 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
768 [48251]: https://github.com/rust-lang/rust/issues/48251
769 [48308]: https://github.com/rust-lang/rust/issues/48308
770 [48318]: https://github.com/rust-lang/rust/issues/48318
771 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
774 Version 1.24.0 (2018-02-15)
775 ==========================
779 - [External `sysv64` ffi is now available.][46528]
780 eg. `extern "sysv64" fn foo () {}`
784 - [rustc now uses 16 codegen units by default for release builds.][46910]
785 For the fastest builds, utilize `codegen-units=1`.
786 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
787 - [Add `aarch64-unknown-openbsd` support][46760]
791 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
792 improvement in performance in the majority of cases.
793 - [`OsStr`'s `Debug` implementation is now lossless and consistent
794 with Windows.][46798]
795 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
796 - [impl `From<bool>` for `AtomicBool`][46293]
797 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
798 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
799 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
800 - [float::from_bits now just uses transmute.][46012] This provides
801 some optimisations from LLVM.
802 - [Copied `AsciiExt` methods onto `char`][46077]
803 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
804 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
805 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
806 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
810 - [`RefCell::replace`]
812 - [`atomic::spin_loop_hint`]
814 The following functions can now be used in a constant expression.
815 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
817 - [`AtomicBool::new`][46287]
818 - [`AtomicUsize::new`][46287]
819 - [`AtomicIsize::new`][46287]
820 - [`AtomicPtr::new`][46287]
821 - [`Cell::new`][46287]
822 - [`{integer}::min_value`][46287]
823 - [`{integer}::max_value`][46287]
824 - [`mem::size_of`][46287]
825 - [`mem::align_of`][46287]
826 - [`ptr::null`][46287]
827 - [`ptr::null_mut`][46287]
828 - [`RefCell::new`][46287]
829 - [`UnsafeCell::new`][46287]
833 - [Added a `workspace.default-members` config that
834 overrides implied `--all` in virtual workspaces.][cargo/4743]
835 - [Enable incremental by default on development builds.][cargo/4817] Also added
836 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
837 per-project or global basis respectively.
844 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
845 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
846 in accordance with IETF RFC 4291 §2.2.
847 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
848 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
849 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
850 - [Leading zeros in tuple struct members is now an error][47084]
851 - [`column!()` macro is one-based instead of zero-based][46977]
852 - [`fmt::Arguments` can no longer be shared across threads][45198]
853 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
854 - [Cargo sets a different working directory for the compiler][cargo/4788]
856 [44884]: https://github.com/rust-lang/rust/pull/44884
857 [45198]: https://github.com/rust-lang/rust/pull/45198
858 [45506]: https://github.com/rust-lang/rust/pull/45506
859 [45904]: https://github.com/rust-lang/rust/pull/45904
860 [45990]: https://github.com/rust-lang/rust/pull/45990
861 [46012]: https://github.com/rust-lang/rust/pull/46012
862 [46077]: https://github.com/rust-lang/rust/pull/46077
863 [46094]: https://github.com/rust-lang/rust/pull/46094
864 [46284]: https://github.com/rust-lang/rust/pull/46284
865 [46287]: https://github.com/rust-lang/rust/pull/46287
866 [46293]: https://github.com/rust-lang/rust/pull/46293
867 [46528]: https://github.com/rust-lang/rust/pull/46528
868 [46671]: https://github.com/rust-lang/rust/pull/46671
869 [46713]: https://github.com/rust-lang/rust/pull/46713
870 [46735]: https://github.com/rust-lang/rust/pull/46735
871 [46749]: https://github.com/rust-lang/rust/pull/46749
872 [46760]: https://github.com/rust-lang/rust/pull/46760
873 [46798]: https://github.com/rust-lang/rust/pull/46798
874 [46828]: https://github.com/rust-lang/rust/pull/46828
875 [46831]: https://github.com/rust-lang/rust/pull/46831
876 [46833]: https://github.com/rust-lang/rust/pull/46833
877 [46910]: https://github.com/rust-lang/rust/pull/46910
878 [46977]: https://github.com/rust-lang/rust/pull/46977
879 [47018]: https://github.com/rust-lang/rust/pull/47018
880 [47080]: https://github.com/rust-lang/rust/pull/47080
881 [47084]: https://github.com/rust-lang/rust/pull/47084
882 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
883 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
884 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
885 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
886 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
887 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
890 Version 1.23.0 (2018-01-04)
891 ==========================
895 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
896 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
897 Which should fix some confusing errors in some operations.
901 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
902 undefined behaviour.][45920]
903 - [rustc now suggests renaming import if names clash.][45660]
904 - [Display errors/warnings correctly when there are zero-width or
905 wide characters.][45711]
906 - [rustc now avoids unnecessary copies of arguments that are
907 simple bindings][45380] This should improve memory usage on average by 5-10%.
908 - [Updated musl used to build musl rustc to 1.1.17][45393]
912 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
913 - [Implement Hash for raw pointers to unsized types][45483]
914 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
915 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
916 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
917 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
918 and `<*mut T>::as_mut`][44932]
919 - [Optimized `Thread::{park, unpark}` implementation][45524]
920 - [Improved `SliceExt::binary_search` performance.][45333]
921 - [impl `FromIterator<()>` for `()`][45379]
922 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
930 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
931 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
932 - [Added unit test checking to `cargo check`][cargo/4592]
933 - [Cargo now lets you install a specific version
934 using `cargo install --version`][cargo/4637]
938 - [Releases now ship with the Cargo book documentation.][45692]
939 - [rustdoc now prints rendering warnings on every run.][45324]
943 - [Changes have been made to type equality to make it more correct,
944 in rare cases this could break some code.][45853] [Tracking issue for
945 further information][45852]
946 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
947 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
948 Android 9, the minimum supported version is Android 14.
949 - [Bumped the minimum LLVM to 3.9][45326]
951 [44042]: https://github.com/rust-lang/rust/pull/44042
952 [44932]: https://github.com/rust-lang/rust/pull/44932
953 [45267]: https://github.com/rust-lang/rust/pull/45267
954 [45324]: https://github.com/rust-lang/rust/pull/45324
955 [45326]: https://github.com/rust-lang/rust/pull/45326
956 [45333]: https://github.com/rust-lang/rust/pull/45333
957 [45379]: https://github.com/rust-lang/rust/pull/45379
958 [45380]: https://github.com/rust-lang/rust/pull/45380
959 [45393]: https://github.com/rust-lang/rust/pull/45393
960 [45435]: https://github.com/rust-lang/rust/pull/45435
961 [45483]: https://github.com/rust-lang/rust/pull/45483
962 [45524]: https://github.com/rust-lang/rust/pull/45524
963 [45571]: https://github.com/rust-lang/rust/pull/45571
964 [45580]: https://github.com/rust-lang/rust/pull/45580
965 [45610]: https://github.com/rust-lang/rust/pull/45610
966 [45660]: https://github.com/rust-lang/rust/pull/45660
967 [45692]: https://github.com/rust-lang/rust/pull/45692
968 [45711]: https://github.com/rust-lang/rust/pull/45711
969 [45772]: https://github.com/rust-lang/rust/pull/45772
970 [45852]: https://github.com/rust-lang/rust/issues/45852
971 [45853]: https://github.com/rust-lang/rust/pull/45853
972 [45887]: https://github.com/rust-lang/rust/pull/45887
973 [45920]: https://github.com/rust-lang/rust/pull/45920
974 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
975 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
976 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
979 Version 1.22.1 (2017-11-22)
980 ==========================
982 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
984 [46183]: https://github.com/rust-lang/rust/pull/46183
986 Version 1.22.0 (2017-11-22)
987 ==========================
991 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
992 - [Now accepts underscores in unicode escapes][43716]
993 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
994 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
998 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
999 - [rustc will no longer inline in codegen units when compiling for debug][45075]
1000 This should decrease compile times for debug builds.
1001 - [strict memory alignment now enabled on ARMv6][45094]
1002 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
1006 - [Allow atomic operations up to 32 bits
1007 on `armv5te_unknown_linux_gnueabi`][44978]
1008 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
1009 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
1010 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
1011 - [Properly detect overflow in `Instant += Duration`.][44220]
1012 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
1013 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
1014 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
1021 - [Cargo will now build multi file examples in subdirectories of the `examples`
1022 folder that have a `main.rs` file.][cargo/4496]
1023 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
1024 the old format will continue to work and can be updated with `cargo update`.
1025 - [Now supports vendoring git repositories][cargo/3992]
1029 - [`libbacktrace` is now available on Apple platforms.][44251]
1030 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
1031 This now lets you specify that a given code example will fail to compile.
1035 - [The minimum Android version that rustc can build for has been bumped
1036 to `4.0` from `2.3`][45656]
1037 - [Allowing `T op= &T` for numeric types has broken some type
1038 inference cases][45480]
1041 [42526]: https://github.com/rust-lang/rust/pull/42526
1042 [43017]: https://github.com/rust-lang/rust/pull/43017
1043 [43716]: https://github.com/rust-lang/rust/pull/43716
1044 [43949]: https://github.com/rust-lang/rust/pull/43949
1045 [44015]: https://github.com/rust-lang/rust/pull/44015
1046 [44220]: https://github.com/rust-lang/rust/pull/44220
1047 [44251]: https://github.com/rust-lang/rust/pull/44251
1048 [44287]: https://github.com/rust-lang/rust/pull/44287
1049 [44303]: https://github.com/rust-lang/rust/pull/44303
1050 [44456]: https://github.com/rust-lang/rust/pull/44456
1051 [44466]: https://github.com/rust-lang/rust/pull/44466
1052 [44895]: https://github.com/rust-lang/rust/pull/44895
1053 [44966]: https://github.com/rust-lang/rust/pull/44966
1054 [44978]: https://github.com/rust-lang/rust/pull/44978
1055 [45041]: https://github.com/rust-lang/rust/pull/45041
1056 [45064]: https://github.com/rust-lang/rust/pull/45064
1057 [45075]: https://github.com/rust-lang/rust/pull/45075
1058 [45094]: https://github.com/rust-lang/rust/pull/45094
1059 [45095]: https://github.com/rust-lang/rust/pull/45095
1060 [45480]: https://github.com/rust-lang/rust/issues/45480
1061 [45656]: https://github.com/rust-lang/rust/pull/45656
1062 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
1063 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
1064 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
1071 Version 1.21.0 (2017-10-12)
1072 ==========================
1076 - [You can now use static references for literals.][43838]
1080 let x: &'static u32 = &0;
1083 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
1086 my_macro!(Vec<i32>::new); // Always worked
1087 my_macro!(Vec::<i32>::new); // Now works
1092 - [Upgraded jemalloc to 4.5.0][43911]
1093 - [Enabled unwinding panics on Redox][43917]
1094 - [Now runs LLVM in parallel during translation phase.][43506]
1095 This should reduce peak memory usage.
1099 - [Generate builtin impls for `Clone` for all arrays and tuples that
1100 are `T: Clone`][43690]
1101 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
1102 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
1103 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
1108 [`std::mem::discriminant`]
1112 - [You can now call `cargo install` with multiple package names][cargo/4216]
1113 - [Cargo commands inside a virtual workspace will now implicitly
1114 pass `--all`][cargo/4335]
1115 - [Added a `[patch]` section to `Cargo.toml` to handle
1116 prepublication dependencies][cargo/4123] [RFC 1969]
1117 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
1118 like patterns][cargo/4270]
1119 - [Added the `--all-targets` option][cargo/4400]
1120 - [Using required dependencies as a feature is now deprecated and emits
1121 a warning][cargo/4364]
1126 - [Cargo docs are moving][43916]
1127 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
1128 - [The rustdoc book is now available][43863]
1129 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
1130 - [Added a preview of RLS has been made available through rustup][44204]
1131 Install with `rustup component add rls-preview`
1132 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
1133 Previously only showed `std::os::unix`.
1137 - [Changes in method matching against higher-ranked types][43880] This may cause
1138 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
1139 - [rustc's JSON error output's byte position start at top of file.][42973]
1140 Was previously relative to the rustc's internal `CodeMap` struct which
1141 required the unstable library `libsyntax` to correctly use.
1142 - [`unused_results` lint no longer ignores booleans][43728]
1144 [42565]: https://github.com/rust-lang/rust/pull/42565
1145 [42973]: https://github.com/rust-lang/rust/pull/42973
1146 [43348]: https://github.com/rust-lang/rust/pull/43348
1147 [43459]: https://github.com/rust-lang/rust/pull/43459
1148 [43506]: https://github.com/rust-lang/rust/pull/43506
1149 [43540]: https://github.com/rust-lang/rust/pull/43540
1150 [43690]: https://github.com/rust-lang/rust/pull/43690
1151 [43728]: https://github.com/rust-lang/rust/pull/43728
1152 [43838]: https://github.com/rust-lang/rust/pull/43838
1153 [43863]: https://github.com/rust-lang/rust/pull/43863
1154 [43880]: https://github.com/rust-lang/rust/pull/43880
1155 [43911]: https://github.com/rust-lang/rust/pull/43911
1156 [43916]: https://github.com/rust-lang/rust/pull/43916
1157 [43917]: https://github.com/rust-lang/rust/pull/43917
1158 [44204]: https://github.com/rust-lang/rust/pull/44204
1159 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
1160 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
1161 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1162 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
1163 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
1164 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
1165 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
1166 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
1167 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
1169 Version 1.20.0 (2017-08-31)
1170 ===========================
1174 - [Associated constants are now stabilised.][42809]
1175 - [A lot of macro bugs are now fixed.][42913]
1180 - [Struct fields are now properly coerced to the expected field type.][42807]
1181 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
1182 `wasm32-experimental-emscripten` target.
1183 - [Changed some of the error messages to be more helpful.][42033]
1184 - [Add support for RELRO(RELocation Read-Only) for platforms that support
1186 - [rustc now reports the total number of errors on compilation failure][43015]
1187 previously this was only the number of errors in the pass that failed.
1188 - [Expansion in rustc has been sped up 29x.][42533]
1189 - [added `msp430-none-elf` target.][43099]
1190 - [rustc will now suggest one-argument enum variant to fix type mismatch when
1192 - [Fixes backtraces on Redox][43228]
1193 - [rustc now identifies different versions of same crate when absolute paths of
1194 different types match in an error message.][42826]
1200 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
1201 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
1203 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
1204 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
1205 - [Impl `Clone` for `DefaultHasher`.][42799]
1206 - [Impl `Sync` for `SyncSender`.][42397]
1207 - [Impl `FromStr` for `char`][42271]
1208 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
1210 - [allow messages in the `unimplemented!()` macro.][42155]
1211 ie. `unimplemented!("Waiting for 1.21 to be stable")`
1212 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
1213 - [Upgrade to Unicode 10.0.0][42999]
1214 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
1215 - [Skip the main thread's manual stack guard on Linux][43072]
1216 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
1217 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
1219 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
1224 - [`CStr::into_c_string`]
1225 - [`CString::as_c_str`]
1226 - [`CString::into_boxed_c_str`]
1227 - [`Chain::get_mut`]
1228 - [`Chain::get_ref`]
1229 - [`Chain::into_inner`]
1230 - [`Option::get_or_insert_with`]
1231 - [`Option::get_or_insert`]
1232 - [`OsStr::into_os_string`]
1233 - [`OsString::into_boxed_os_str`]
1236 - [`Utf8Error::error_len`]
1237 - [`char::EscapeDebug`]
1238 - [`char::escape_debug`]
1239 - [`compile_error!`]
1240 - [`f32::from_bits`]
1242 - [`f64::from_bits`]
1244 - [`mem::ManuallyDrop`]
1245 - [`slice::sort_unstable_by_key`]
1246 - [`slice::sort_unstable_by`]
1247 - [`slice::sort_unstable`]
1248 - [`str::from_boxed_utf8_unchecked`]
1249 - [`str::as_bytes_mut`]
1250 - [`str::as_bytes_mut`]
1251 - [`str::from_utf8_mut`]
1252 - [`str::from_utf8_unchecked_mut`]
1254 - [`str::get_unchecked_mut`]
1255 - [`str::get_unchecked`]
1257 - [`str::into_boxed_bytes`]
1262 - [Cargo API token location moved from `~/.cargo/config` to
1263 `~/.cargo/credentials`.][cargo/3978]
1264 - [Cargo will now build `main.rs` binaries that are in sub-directories of
1265 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
1266 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
1267 - [You can now specify version of a binary when installed through
1268 `cargo install` using `--vers`.][cargo/4229]
1269 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
1270 failure.][cargo/4248]
1271 - [Changed the convention around which file is the crate root.][cargo/4259]
1272 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
1273 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
1278 - [Functions with `'static` in their return types will now not be as usable as
1279 if they were using lifetime parameters instead.][42417]
1280 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
1281 takes the sign of NaN into account where previously didn't.][42430]
1283 [42033]: https://github.com/rust-lang/rust/pull/42033
1284 [42155]: https://github.com/rust-lang/rust/pull/42155
1285 [42271]: https://github.com/rust-lang/rust/pull/42271
1286 [42397]: https://github.com/rust-lang/rust/pull/42397
1287 [42417]: https://github.com/rust-lang/rust/pull/42417
1288 [42430]: https://github.com/rust-lang/rust/pull/42430
1289 [42431]: https://github.com/rust-lang/rust/pull/42431
1290 [42533]: https://github.com/rust-lang/rust/pull/42533
1291 [42571]: https://github.com/rust-lang/rust/pull/42571
1292 [42613]: https://github.com/rust-lang/rust/pull/42613
1293 [42799]: https://github.com/rust-lang/rust/pull/42799
1294 [42807]: https://github.com/rust-lang/rust/pull/42807
1295 [42809]: https://github.com/rust-lang/rust/pull/42809
1296 [42822]: https://github.com/rust-lang/rust/pull/42822
1297 [42826]: https://github.com/rust-lang/rust/pull/42826
1298 [42854]: https://github.com/rust-lang/rust/pull/42854
1299 [42913]: https://github.com/rust-lang/rust/pull/42913
1300 [42999]: https://github.com/rust-lang/rust/pull/42999
1301 [43011]: https://github.com/rust-lang/rust/pull/43011
1302 [43015]: https://github.com/rust-lang/rust/pull/43015
1303 [43072]: https://github.com/rust-lang/rust/pull/43072
1304 [43077]: https://github.com/rust-lang/rust/pull/43077
1305 [43097]: https://github.com/rust-lang/rust/pull/43097
1306 [43099]: https://github.com/rust-lang/rust/pull/43099
1307 [43170]: https://github.com/rust-lang/rust/pull/43170
1308 [43178]: https://github.com/rust-lang/rust/pull/43178
1309 [43185]: https://github.com/rust-lang/rust/pull/43185
1310 [43228]: https://github.com/rust-lang/rust/pull/43228
1311 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
1312 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
1313 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
1314 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
1315 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
1316 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1317 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
1318 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
1319 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
1320 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
1321 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
1322 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
1323 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
1324 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
1325 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
1326 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
1327 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
1328 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
1329 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
1330 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
1331 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
1332 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
1333 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
1334 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
1335 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
1336 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
1337 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
1338 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
1339 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
1340 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
1341 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
1342 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
1343 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
1344 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
1345 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
1346 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
1347 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
1348 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
1349 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
1352 Version 1.19.0 (2017-07-20)
1353 ===========================
1358 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
1359 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
1360 - [Macro recursion limit increased to 1024 from 64.][41676]
1361 - [Added lint for detecting unused macros.][41907]
1362 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
1363 For example: `let x = loop { break 7; };`
1364 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
1365 contain `Copy` types and cannot have a `Drop` implementation.
1366 Example: `union Foo { bar: u8, baz: usize }`
1367 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
1368 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
1373 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
1374 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
1375 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
1376 you should use `--target armv7-linux-androideabi`.
1377 - [Fixed ICE when removing a source file between compilation sessions.][41873]
1378 - [Minor optimisation of string operations.][42037]
1379 - [Compiler error message is now `aborting due to previous error(s)` instead of
1380 `aborting due to N previous errors`][42150] This was previously inaccurate and
1381 would only count certain kinds of errors.
1382 - [The compiler now supports Visual Studio 2017][42225]
1383 - [The compiler is now built against LLVM 4.0.1 by default][42948]
1384 - [Added a lot][42264] of [new error codes][42302]
1385 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
1386 libraries with C Run-time Libraries(CRT) to be statically linked.
1387 - [Fixed various ARM codegen bugs][42740]
1392 - [`String` now implements `FromIterator<Cow<'a, str>>` and
1393 `Extend<Cow<'a, str>>`][41449]
1394 - [`Vec` now implements `From<&mut [T]>`][41530]
1395 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
1396 - [`SplitWhitespace` now implements `Clone`][41659]
1397 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
1399 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
1400 macros, but for printing to stderr.
1405 - [`OsString::shrink_to_fit`]
1408 - [`thread::ThreadId`]
1413 - [Build scripts can now add environment variables to the environment
1414 the crate is being compiled in.
1415 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
1416 - [Subcommands now replace the current process rather than spawning a new
1417 child process][cargo/3970]
1418 - [Workspace members can now accept glob file patterns][cargo/3979]
1419 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
1420 the members in a given workspace.][cargo/3988]
1421 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
1422 - [Target directory path is now in the cargo metadata][cargo/4022]
1423 - [Cargo no longer checks out a local working directory for the
1424 crates.io index][cargo/4026] This should provide smaller file size for the
1425 registry, and improve cloning times, especially on Windows machines.
1426 - [Added an `--exclude` option for excluding certain packages when using the
1427 `--all` option][cargo/4031]
1428 - [Cargo will now automatically retry when receiving a 5xx error
1429 from crates.io][cargo/4032]
1430 - [The `--features` option now accepts multiple comma or space
1431 delimited values.][cargo/4084]
1432 - [Added support for custom target specific runners][cargo/3954]
1437 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
1439 - [Rust will now release XZ compressed packages][rust-installer/57]
1440 - [rustup will now prefer to download rust packages with
1441 XZ compression][rustup/1100] over GZip packages.
1442 - [Added the ability to escape `#` in rust documentation][41785] By adding
1443 additional `#`'s ie. `##` is now `#`
1448 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
1449 - [`-Z` flags are now no longer allowed to be used on the stable
1450 compiler.][41751] This has been a warning for a year previous to this.
1451 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
1452 longer works][42844]. Users should migrate to the built-in `check`
1453 command, which has been available since 1.16.
1454 - [Ending a float literal with `._` is now a hard error.
1455 Example: `42._` .][41946]
1456 - [Any use of a private `extern crate` outside of its module is now a
1457 hard error.][36886] This was previously a warning.
1458 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
1459 relative while the `::` prefix makes a path absolute, but was ignored and the
1460 path was relative regardless.
1461 - [Floating point constants in match patterns is now a hard error][36890]
1462 This was previously a warning.
1463 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
1464 match patterns is now a hard error][36891] This was previously a warning.
1465 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
1467 - [From the pound escape, lines consisting of multiple `#`s are
1469 - [It is an error to re-export private enum variants][42460]. This is
1470 known to break a number of crates that depend on an older version of
1472 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
1473 to use it to find the linker, and the build will fail where it did
1474 not previously][42607]
1476 [36886]: https://github.com/rust-lang/rust/issues/36886
1477 [36888]: https://github.com/rust-lang/rust/issues/36888
1478 [36890]: https://github.com/rust-lang/rust/issues/36890
1479 [36891]: https://github.com/rust-lang/rust/issues/36891
1480 [36892]: https://github.com/rust-lang/rust/issues/36892
1481 [37406]: https://github.com/rust-lang/rust/issues/37406
1482 [39983]: https://github.com/rust-lang/rust/pull/39983
1483 [41145]: https://github.com/rust-lang/rust/pull/41145
1484 [41192]: https://github.com/rust-lang/rust/pull/41192
1485 [41258]: https://github.com/rust-lang/rust/pull/41258
1486 [41370]: https://github.com/rust-lang/rust/pull/41370
1487 [41449]: https://github.com/rust-lang/rust/pull/41449
1488 [41530]: https://github.com/rust-lang/rust/pull/41530
1489 [41624]: https://github.com/rust-lang/rust/pull/41624
1490 [41656]: https://github.com/rust-lang/rust/pull/41656
1491 [41659]: https://github.com/rust-lang/rust/pull/41659
1492 [41676]: https://github.com/rust-lang/rust/pull/41676
1493 [41751]: https://github.com/rust-lang/rust/pull/41751
1494 [41764]: https://github.com/rust-lang/rust/pull/41764
1495 [41785]: https://github.com/rust-lang/rust/pull/41785
1496 [41873]: https://github.com/rust-lang/rust/pull/41873
1497 [41907]: https://github.com/rust-lang/rust/pull/41907
1498 [41946]: https://github.com/rust-lang/rust/pull/41946
1499 [42016]: https://github.com/rust-lang/rust/pull/42016
1500 [42037]: https://github.com/rust-lang/rust/pull/42037
1501 [42068]: https://github.com/rust-lang/rust/pull/42068
1502 [42150]: https://github.com/rust-lang/rust/pull/42150
1503 [42162]: https://github.com/rust-lang/rust/pull/42162
1504 [42225]: https://github.com/rust-lang/rust/pull/42225
1505 [42264]: https://github.com/rust-lang/rust/pull/42264
1506 [42302]: https://github.com/rust-lang/rust/pull/42302
1507 [42460]: https://github.com/rust-lang/rust/issues/42460
1508 [42607]: https://github.com/rust-lang/rust/issues/42607
1509 [42740]: https://github.com/rust-lang/rust/pull/42740
1510 [42844]: https://github.com/rust-lang/rust/issues/42844
1511 [42948]: https://github.com/rust-lang/rust/pull/42948
1512 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
1513 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
1514 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
1515 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
1516 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
1517 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
1518 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
1519 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
1520 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
1521 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
1522 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
1523 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
1524 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
1525 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
1526 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
1527 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
1528 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
1529 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
1530 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
1531 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
1532 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
1533 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
1536 Version 1.18.0 (2017-06-08)
1537 ===========================
1542 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
1543 make the item visible to just that module tree. Also accepts the keyword
1544 `crate` to make something public to the whole crate but not users of the
1545 library. Example: `pub(crate) mod utils;`. [RFC 1422].
1546 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
1547 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
1548 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
1549 types like `Write + Send`, trailing `+` are now supported in trait objects,
1550 and better error reporting for trait objects starting with `?Sized`.
1551 - [0e+10 is now a valid floating point literal][40589]
1552 - [Now warns if you bind a lifetime parameter to 'static][40734]
1553 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
1554 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
1555 representation in some cases.][40377]
1560 - [rustc can now emit mir with `--emit mir`][39891]
1561 - [Improved LLVM IR for trivial functions][40367]
1562 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
1563 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
1564 opportunities found through profiling
1565 - [Improved backtrace formatting when panicking][38165]
1570 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
1571 iterator hasn't been advanced the original `Vec` is reassembled with no actual
1572 iteration or reallocation.
1573 - [Simplified HashMap Bucket interface][40561] provides performance
1574 improvements for iterating and cloning.
1575 - [Specialize Vec::from_elem to use calloc][40409]
1576 - [Fixed Race condition in fs::create_dir_all][39799]
1577 - [No longer caching stdio on Windows][40516]
1578 - [Optimized insertion sort in slice][40807] insertion sort in some cases
1579 2.50%~ faster and in one case now 12.50% faster.
1580 - [Optimized `AtomicBool::fetch_nand`][41143]
1585 - [`Child::try_wait`]
1586 - [`HashMap::retain`]
1587 - [`HashSet::retain`]
1589 - [`TcpStream::peek`]
1590 - [`UdpSocket::peek`]
1591 - [`UdpSocket::peek_from`]
1596 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
1597 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
1598 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
1599 - [Added Android build support][cargo/3885]
1600 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
1601 of a certain type, for example `cargo build --bins` will build all
1603 - [Added support for haiku][cargo/3952]
1608 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
1609 - [Added rust-windbg script for better debugging on Windows][39983]
1610 - [Rust now uses the official cross compiler for NetBSD][40612]
1611 - [rustdoc now accepts `#` at the start of files][40828]
1612 - [Fixed jemalloc support for musl][41168]
1617 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
1618 always placed after the sign if it exists and before the digits. With the `#`
1619 flag the zeroes are placed after the prefix and before the digits.
1620 - [Due to the struct field optimisation][40377], using `transmute` on structs
1621 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
1622 always been undefined behavior, but is now more likely to break in practice.
1623 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
1624 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
1625 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
1626 - [Overlapping inherent `impl`s are now a hard error][40728]
1627 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
1628 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
1629 `out.asm` and `out.ll` instead of only one of the filetypes.
1630 - [ calling a function that returns `Self` will no longer work][41805] when
1631 the size of `Self` cannot be statically determined.
1632 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
1633 this has caused a few regressions namely:
1635 - Changed the link order of local static/dynamic libraries (respecting the
1636 order on given rather than having the compiler reorder).
1637 - Changed how MinGW is linked, native code linked to dynamic libraries
1638 may require manually linking to the gcc support library (for the native
1641 [38165]: https://github.com/rust-lang/rust/pull/38165
1642 [39799]: https://github.com/rust-lang/rust/pull/39799
1643 [39891]: https://github.com/rust-lang/rust/pull/39891
1644 [39983]: https://github.com/rust-lang/rust/pull/39983
1645 [40043]: https://github.com/rust-lang/rust/pull/40043
1646 [40241]: https://github.com/rust-lang/rust/pull/40241
1647 [40338]: https://github.com/rust-lang/rust/pull/40338
1648 [40367]: https://github.com/rust-lang/rust/pull/40367
1649 [40377]: https://github.com/rust-lang/rust/pull/40377
1650 [40409]: https://github.com/rust-lang/rust/pull/40409
1651 [40516]: https://github.com/rust-lang/rust/pull/40516
1652 [40556]: https://github.com/rust-lang/rust/pull/40556
1653 [40561]: https://github.com/rust-lang/rust/pull/40561
1654 [40589]: https://github.com/rust-lang/rust/pull/40589
1655 [40612]: https://github.com/rust-lang/rust/pull/40612
1656 [40723]: https://github.com/rust-lang/rust/pull/40723
1657 [40728]: https://github.com/rust-lang/rust/pull/40728
1658 [40731]: https://github.com/rust-lang/rust/pull/40731
1659 [40734]: https://github.com/rust-lang/rust/pull/40734
1660 [40805]: https://github.com/rust-lang/rust/pull/40805
1661 [40807]: https://github.com/rust-lang/rust/pull/40807
1662 [40828]: https://github.com/rust-lang/rust/pull/40828
1663 [40870]: https://github.com/rust-lang/rust/pull/40870
1664 [41085]: https://github.com/rust-lang/rust/pull/41085
1665 [41143]: https://github.com/rust-lang/rust/pull/41143
1666 [41168]: https://github.com/rust-lang/rust/pull/41168
1667 [41270]: https://github.com/rust-lang/rust/issues/41270
1668 [41469]: https://github.com/rust-lang/rust/pull/41469
1669 [41805]: https://github.com/rust-lang/rust/issues/41805
1670 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
1671 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
1672 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
1673 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
1674 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
1675 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
1676 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
1677 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
1678 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
1679 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
1680 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
1681 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
1682 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
1683 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
1686 Version 1.17.0 (2017-04-27)
1687 ===========================
1692 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
1693 * [Fields of structs may be initialized without duplicating the field/variable
1694 names][39761]. [RFC 1682]
1695 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
1696 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1697 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
1698 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
1699 `'b`. Soundness fix.
1700 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
1701 * [Static variables may contain references to other statics][40027]
1706 * [Exit quickly on only `--emit dep-info`][40336]
1707 * [Make `-C relocation-model` more correctly determine whether the linker
1708 creates a position-independent executable][40245]
1709 * [Add `-C overflow-checks` to directly control whether integer overflow
1711 * [The rustc type checker now checks items on demand instead of in a single
1712 in-order pass][40008]. This is mostly an internal refactoring in support of
1713 future work, including incremental type checking, but also resolves [RFC
1714 1647], allowing `Self` to appear in `impl` `where` clauses.
1715 * [Optimize vtable loads][39995]
1716 * [Turn off vectorization for Emscripten targets][39990]
1717 * [Provide suggestions for unknown macros imported with `use`][39953]
1718 * [Fix ICEs in path resolution][39939]
1719 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
1720 * [Add clearer error message using `&str + &str`][39116]
1731 * [`Ordering::then`]
1732 * [`Ordering::then_with`]
1733 * [`BTreeMap::range`]
1734 * [`BTreeMap::range_mut`]
1735 * [`collections::Bound`]
1736 * [`process::abort`]
1737 * [`ptr::read_unaligned`]
1738 * [`ptr::write_unaligned`]
1739 * [`Result::expect_err`]
1742 * [`Cell::into_inner`]
1748 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
1749 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
1750 * [`String` implements `FromIterator<&char>`][40028]
1751 * `Box` [implements][40009] a number of new conversions:
1752 `From<Box<str>> for String`,
1753 `From<Box<[T]>> for Vec<T>`,
1754 `From<Box<CStr>> for CString`,
1755 `From<Box<OsStr>> for OsString`,
1756 `From<Box<Path>> for PathBuf`,
1757 `Into<Box<str>> for String`,
1758 `Into<Box<[T]>> for Vec<T>`,
1759 `Into<Box<CStr>> for CString`,
1760 `Into<Box<OsStr>> for OsString`,
1761 `Into<Box<Path>> for PathBuf`,
1762 `Default for Box<str>`,
1763 `Default for Box<CStr>`,
1764 `Default for Box<OsStr>`,
1765 `From<&CStr> for Box<CStr>`,
1766 `From<&OsStr> for Box<OsStr>`,
1767 `From<&Path> for Box<Path>`
1768 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
1769 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
1770 * [Slightly optimize `slice::sort`][39538]
1771 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
1772 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
1773 `Box<str>` implements `From<&str>`][39438]
1774 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
1775 `From<(I, u16)> where I: Into<IpAddr>`][39372]
1776 * [`format!` estimates the needed capacity before writing a string][39356]
1777 * [Support unprivileged symlink creation in Windows][38921]
1778 * [`PathBuf` implements `Default`][38764]
1779 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
1780 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
1781 and poor hash functions.
1786 * [Add `cargo check --all`][cargo/3731]
1787 * [Add an option to ignore SSL revocation checking][cargo/3699]
1788 * [Add `cargo run --package`][cargo/3691]
1789 * [Add `required_features`][cargo/3667]
1790 * [Assume `build.rs` is a build script][cargo/3664]
1791 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
1796 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
1798 * [The "Unstable Book" documents nightly-only features][ubook]
1799 * [Improve the style of the sidebar in rustdoc output][40265]
1800 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
1801 * [Fix MSP430 breakage due to `i128`][40257]
1802 * [Preliminary Solaris/SPARCv9 support][39903]
1803 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
1804 run without installing the MSVC runtime.
1805 * [`rustdoc --test` includes file names in test names][39788]
1806 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
1807 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
1808 * [Initial support for `aarch64-unknown-freebsd`][39491]
1809 * [Initial support for `i686-unknown-netbsd`][39426]
1810 * [This release no longer includes the old makefile build system][39431]. Rust
1811 is built with a custom build system, written in Rust, and with Cargo.
1812 * [Add Debug implementations for libcollection structs][39002]
1813 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
1814 * [`--test-threads=0` produces an error][38945]
1815 * [`rustup` installs documentation by default][40526]
1816 * [The Rust source includes NatVis visualizations][39843]. These can be used by
1817 WinDbg and Visual Studio to improve the debugging experience.
1822 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
1823 workaround, either use MSVC 2015 or run vcvars.bat.
1824 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1825 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
1826 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
1828 * [`format!` and `Display::to_string` panic if an underlying formatting
1829 implementation returns an error][40117]. Previously the error was silently
1830 ignored. It is incorrect for `write_fmt` to return an error when writing
1832 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
1833 crates were marked stable and could be accessed from the stable toolchain.
1834 * [Rust git source no longer includes vendored crates][39728]. Those that need
1835 to build with vendored crates should build from release tarballs.
1836 * [Fix inert attributes from `proc_macro_derives`][39572]
1837 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
1838 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
1840 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
1841 existing code generally ignores the type of dead-code unless a type-hint is
1842 provided; this can cause surprising inference interactions particularly around
1843 defaulting. The new code uniformly ignores the result type of dead-code.
1844 * [Tuple-struct constructors with private fields are no longer visible][38932]
1845 * [Lifetime parameters that do not appear in the arguments are now considered
1846 early-bound][38897], resolving a soundness bug (#[32330]). The
1847 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
1849 * [rustdoc: fix doctests with non-feature crate attributes][38161]
1850 * [Make transmuting from fn item types to pointer-sized types a hard
1853 [27787]: https://github.com/rust-lang/rust/issues/27787
1854 [32330]: https://github.com/rust-lang/rust/issues/32330
1855 [34198]: https://github.com/rust-lang/rust/pull/34198
1856 [38161]: https://github.com/rust-lang/rust/pull/38161
1857 [38368]: https://github.com/rust-lang/rust/pull/38368
1858 [38584]: https://github.com/rust-lang/rust/issues/38584
1859 [38661]: https://github.com/rust-lang/rust/pull/38661
1860 [38764]: https://github.com/rust-lang/rust/pull/38764
1861 [38864]: https://github.com/rust-lang/rust/issues/38864
1862 [38897]: https://github.com/rust-lang/rust/pull/38897
1863 [38921]: https://github.com/rust-lang/rust/pull/38921
1864 [38932]: https://github.com/rust-lang/rust/pull/38932
1865 [38945]: https://github.com/rust-lang/rust/pull/38945
1866 [38981]: https://github.com/rust-lang/rust/pull/38981
1867 [39002]: https://github.com/rust-lang/rust/pull/39002
1868 [39116]: https://github.com/rust-lang/rust/pull/39116
1869 [39193]: https://github.com/rust-lang/rust/pull/39193
1870 [39265]: https://github.com/rust-lang/rust/pull/39265
1871 [39356]: https://github.com/rust-lang/rust/pull/39356
1872 [39372]: https://github.com/rust-lang/rust/pull/39372
1873 [39426]: https://github.com/rust-lang/rust/pull/39426
1874 [39431]: https://github.com/rust-lang/rust/pull/39431
1875 [39438]: https://github.com/rust-lang/rust/pull/39438
1876 [39440]: https://github.com/rust-lang/rust/pull/39440
1877 [39485]: https://github.com/rust-lang/rust/pull/39485
1878 [39491]: https://github.com/rust-lang/rust/pull/39491
1879 [39518]: https://github.com/rust-lang/rust/pull/39518
1880 [39538]: https://github.com/rust-lang/rust/pull/39538
1881 [39572]: https://github.com/rust-lang/rust/pull/39572
1882 [39633]: https://github.com/rust-lang/rust/pull/39633
1883 [39642]: https://github.com/rust-lang/rust/pull/39642
1884 [39728]: https://github.com/rust-lang/rust/pull/39728
1885 [39761]: https://github.com/rust-lang/rust/pull/39761
1886 [39788]: https://github.com/rust-lang/rust/pull/39788
1887 [39793]: https://github.com/rust-lang/rust/pull/39793
1888 [39837]: https://github.com/rust-lang/rust/pull/39837
1889 [39843]: https://github.com/rust-lang/rust/pull/39843
1890 [39851]: https://github.com/rust-lang/rust/pull/39851
1891 [39903]: https://github.com/rust-lang/rust/pull/39903
1892 [39939]: https://github.com/rust-lang/rust/pull/39939
1893 [39953]: https://github.com/rust-lang/rust/pull/39953
1894 [39960]: https://github.com/rust-lang/rust/pull/39960
1895 [39990]: https://github.com/rust-lang/rust/pull/39990
1896 [39995]: https://github.com/rust-lang/rust/pull/39995
1897 [40008]: https://github.com/rust-lang/rust/pull/40008
1898 [40009]: https://github.com/rust-lang/rust/pull/40009
1899 [40027]: https://github.com/rust-lang/rust/pull/40027
1900 [40028]: https://github.com/rust-lang/rust/pull/40028
1901 [40037]: https://github.com/rust-lang/rust/pull/40037
1902 [40117]: https://github.com/rust-lang/rust/pull/40117
1903 [40166]: https://github.com/rust-lang/rust/pull/40166
1904 [40245]: https://github.com/rust-lang/rust/pull/40245
1905 [40257]: https://github.com/rust-lang/rust/pull/40257
1906 [40261]: https://github.com/rust-lang/rust/pull/40261
1907 [40265]: https://github.com/rust-lang/rust/pull/40265
1908 [40319]: https://github.com/rust-lang/rust/pull/40319
1909 [40336]: https://github.com/rust-lang/rust/pull/40336
1910 [40526]: https://github.com/rust-lang/rust/pull/40526
1911 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1912 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
1913 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
1914 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
1915 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
1916 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
1917 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
1918 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
1919 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
1920 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
1921 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
1922 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
1923 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
1924 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
1925 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
1926 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
1927 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
1928 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
1929 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
1930 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
1931 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
1932 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
1933 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
1934 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
1935 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
1936 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
1937 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
1938 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
1939 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
1940 [mdbook]: https://crates.io/crates/mdbook
1941 [ubook]: https://doc.rust-lang.org/unstable-book/
1944 Version 1.16.0 (2017-03-16)
1945 ===========================
1950 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1951 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1952 match patterns][38069]
1953 * [Clean up semantics of `self` in an import list][38313]
1954 * [`Self` may appear in `impl` headers][38920]
1955 * [`Self` may appear in struct expressions][39282]
1960 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
1961 a `.rmeta` file containing only crate metadata][38571]. This can be
1962 used by tools like the Rust Language Service to perform
1963 metadata-only builds.
1964 * [Levenshtein based typo suggestions now work in most places, while
1965 previously they worked only for fields and sometimes for local
1966 variables][38927]. Together with the overhaul of "no
1967 resolution"/"unexpected resolution" errors (#[38154]) they result in
1968 large and systematic improvement in resolution diagnostics.
1969 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
1971 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
1972 * [`rustc` no longer attempts to provide "consider using an explicit
1973 lifetime" suggestions][37057]. They were inaccurate.
1978 * [`VecDeque::truncate`]
1979 * [`VecDeque::resize`]
1980 * [`String::insert_str`]
1981 * [`Duration::checked_add`]
1982 * [`Duration::checked_sub`]
1983 * [`Duration::checked_div`]
1984 * [`Duration::checked_mul`]
1987 * [`SocketAddr::is_ipv4`]
1988 * [`SocketAddr::is_ipv6`]
1989 * [`IpAddr::is_ipv4`]
1990 * [`IpAddr::is_ipv6`]
1992 * [`Vec::dedup_by_key`]
1993 * [`Result::unwrap_or_default`]
1994 * [`<*const T>::wrapping_offset`]
1995 * [`<*mut T>::wrapping_offset`]
1996 * `CommandExt::creation_flags`
1997 * [`File::set_permissions`]
1998 * [`String::split_off`]
2003 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
2004 their argument by `Borrow` parameter][37761]
2005 * [All public types in std implement `Debug`][38006]
2006 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
2007 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
2008 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
2010 * [std: Fix partial writes in `LineWriter`][38062]
2011 * [std: Clamp max read/write sizes on Unix][38062]
2012 * [Use more specific panic message for `&str` slicing errors][38066]
2013 * [`TcpListener::set_only_v6` is deprecated][38304]. This
2014 functionality cannot be achieved in std currently.
2015 * [`writeln!`, like `println!`, now accepts a form with no string
2016 or formatting arguments, to just print a newline][38469]
2017 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
2018 * [Reduce the size of static data in `std_unicode::tables`][38781]
2019 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
2020 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
2022 * [`Duration` implements `Sum`][38712]
2023 * [`String` implements `ToSocketAddrs`][39048]
2028 * [The `cargo check` command does a type check of a project without
2029 building it][cargo/3296]
2030 * [crates.io will display CI badges from Travis and AppVeyor, if
2031 specified in Cargo.toml][cargo/3546]
2032 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
2033 * [Compilation profiles accept integer values for `debug`, in addition
2034 to `true` and `false`. These are passed to `rustc` as the value to
2035 `-C debuginfo`][cargo/3534]
2036 * [Implement `cargo --version --verbose`][cargo/3604]
2037 * [All builds now output 'dep-info' build dependencies compatible with
2038 make and ninja][cargo/3557]
2039 * [Build all workspace members with `build --all`][cargo/3511]
2040 * [Document all workspace members with `doc --all`][cargo/3515]
2041 * [Path deps outside workspace are not members][cargo/3443]
2046 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
2047 the path to the Rust implementation][38589]
2048 * [The `armv7-linux-androideabi` target no longer enables NEON
2049 extensions, per Google's ABI guide][38413]
2050 * [The stock standard library can be compiled for Redox OS][38401]
2051 * [Rust has initial SPARC support][38726]. Tier 3. No builds
2053 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
2055 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
2060 * [Uninhabitable enums (those without any variants) no longer permit wildcard
2061 match patterns][38069]
2062 * In this release, references to uninhabited types can not be
2063 pattern-matched. This was accidentally allowed in 1.15.
2064 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
2065 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
2067 * [Clean up semantics of `self` in an import list][38313]
2068 * Reimplemented lifetime elision. This change was almost entirely compatible
2069 with existing code, but it did close a number of small bugs and loopholes,
2070 as well as being more accepting in some other [cases][41105].
2072 [37057]: https://github.com/rust-lang/rust/pull/37057
2073 [37761]: https://github.com/rust-lang/rust/pull/37761
2074 [38006]: https://github.com/rust-lang/rust/pull/38006
2075 [38051]: https://github.com/rust-lang/rust/pull/38051
2076 [38062]: https://github.com/rust-lang/rust/pull/38062
2077 [38062]: https://github.com/rust-lang/rust/pull/38622
2078 [38066]: https://github.com/rust-lang/rust/pull/38066
2079 [38069]: https://github.com/rust-lang/rust/pull/38069
2080 [38131]: https://github.com/rust-lang/rust/pull/38131
2081 [38154]: https://github.com/rust-lang/rust/pull/38154
2082 [38274]: https://github.com/rust-lang/rust/pull/38274
2083 [38304]: https://github.com/rust-lang/rust/pull/38304
2084 [38313]: https://github.com/rust-lang/rust/pull/38313
2085 [38314]: https://github.com/rust-lang/rust/pull/38314
2086 [38327]: https://github.com/rust-lang/rust/pull/38327
2087 [38401]: https://github.com/rust-lang/rust/pull/38401
2088 [38413]: https://github.com/rust-lang/rust/pull/38413
2089 [38469]: https://github.com/rust-lang/rust/pull/38469
2090 [38559]: https://github.com/rust-lang/rust/pull/38559
2091 [38571]: https://github.com/rust-lang/rust/pull/38571
2092 [38580]: https://github.com/rust-lang/rust/pull/38580
2093 [38589]: https://github.com/rust-lang/rust/pull/38589
2094 [38670]: https://github.com/rust-lang/rust/pull/38670
2095 [38712]: https://github.com/rust-lang/rust/pull/38712
2096 [38726]: https://github.com/rust-lang/rust/pull/38726
2097 [38781]: https://github.com/rust-lang/rust/pull/38781
2098 [38798]: https://github.com/rust-lang/rust/pull/38798
2099 [38909]: https://github.com/rust-lang/rust/pull/38909
2100 [38920]: https://github.com/rust-lang/rust/pull/38920
2101 [38927]: https://github.com/rust-lang/rust/pull/38927
2102 [39048]: https://github.com/rust-lang/rust/pull/39048
2103 [39282]: https://github.com/rust-lang/rust/pull/39282
2104 [39379]: https://github.com/rust-lang/rust/pull/39379
2105 [41105]: https://github.com/rust-lang/rust/issues/41105
2106 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2107 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2108 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
2109 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
2110 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
2111 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
2112 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
2113 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
2114 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
2115 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
2116 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
2117 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
2118 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
2119 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
2120 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
2121 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
2122 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
2123 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
2124 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
2125 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
2126 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
2127 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
2128 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
2129 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
2130 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
2131 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
2132 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
2133 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
2134 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
2135 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
2138 Version 1.15.1 (2017-02-09)
2139 ===========================
2141 * [Fix IntoIter::as_mut_slice's signature][39466]
2142 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
2144 [39466]: https://github.com/rust-lang/rust/pull/39466
2145 [39523]: https://github.com/rust-lang/rust/pull/39523
2148 Version 1.15.0 (2017-02-02)
2149 ===========================
2154 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
2155 stable. This allows popular code-generating crates like Serde and Diesel to
2156 work ergonomically. [RFC 1681].
2157 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
2158 with curly braces][36868]. Part of [RFC 1506].
2159 * [A number of minor changes to name resolution have been activated][37127].
2160 They add up to more consistent semantics, allowing for future evolution of
2161 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2162 details of what is different. The breaking changes here have been transitioned
2163 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2164 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
2166 * [`?Sized` can be used in `where` clauses][37791]
2167 * [There is now a limit on the size of monomorphized types and it can be
2168 modified with the `#![type_size_limit]` crate attribute, similarly to
2169 the `#![recursion_limit]` attribute][37789]
2174 * [On Windows, the compiler will apply dllimport attributes when linking to
2175 extern functions][37973]. Additional attributes and flags can control which
2176 library kind is linked and its name. [RFC 1717].
2177 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2178 * [The `--test` flag works with procedural macro crates][38107]
2179 * [Fix `extern "aapcs" fn` ABI][37814]
2180 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
2181 * [The `format!` expander recognizes incorrect `printf` and shell-style
2182 formatting directives and suggests the correct format][37613].
2183 * [Only report one error for all unused imports in an import list][37456]
2185 Compiler Performance
2186 --------------------
2188 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
2189 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
2190 * [Don't clone in `UnificationTable::probe`][37848]
2191 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
2192 * [Use small vectors in type walker][37760]
2193 * [Macro expansion performance was improved][37701]
2194 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
2195 * [Replace FNV with a faster hash function][37229]
2200 * [`std::iter::Iterator::min_by`]
2201 * [`std::iter::Iterator::max_by`]
2202 * [`std::os::*::fs::FileExt`]
2203 * [`std::sync::atomic::Atomic*::get_mut`]
2204 * [`std::sync::atomic::Atomic*::into_inner`]
2205 * [`std::vec::IntoIter::as_slice`]
2206 * [`std::vec::IntoIter::as_mut_slice`]
2207 * [`std::sync::mpsc::Receiver::try_iter`]
2208 * [`std::os::unix::process::CommandExt::before_exec`]
2209 * [`std::rc::Rc::strong_count`]
2210 * [`std::rc::Rc::weak_count`]
2211 * [`std::sync::Arc::strong_count`]
2212 * [`std::sync::Arc::weak_count`]
2213 * [`std::char::encode_utf8`]
2214 * [`std::char::encode_utf16`]
2215 * [`std::cell::Ref::clone`]
2216 * [`std::io::Take::into_inner`]
2221 * [The standard sorting algorithm has been rewritten for dramatic performance
2222 improvements][38192]. It is a hybrid merge sort, drawing influences from
2223 Timsort. Previously it was a naive merge sort.
2224 * [`Iterator::nth` no longer has a `Sized` bound][38134]
2225 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
2227 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
2228 and `char_indices().last()`][37882]
2229 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
2230 * [Chinese characters display correctly in `fmt::Debug`][37855]
2231 * [Derive `Default` for `Duration`][37699]
2232 * [Support creation of anonymous pipes on WinXP/2k][37677]
2233 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
2234 * [Don't pass overlapped handles to processes][38835]
2239 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2240 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2241 should instead check the variable at runtime with `std::env`. That the value
2242 was set at build time was a bug, and incorrect when cross-compiling. This
2243 change is known to cause breakage.
2244 * [Add `--all` flag to `cargo test`][cargo/3221]
2245 * [Compile statically against the MSVC CRT][cargo/3363]
2246 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
2247 * [Link OpenSSL statically on OSX][cargo/3311]
2248 * [Apply new fingerprinting to build dir outputs][cargo/3310]
2249 * [Test for bad path overrides with summaries][cargo/3336]
2250 * [Require `cargo install --vers` to take a semver version][cargo/3338]
2251 * [Fix retrying crate downloads for network errors][cargo/3348]
2252 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
2253 * [Emit more info on --message-format=json][cargo/3319]
2254 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
2255 * [Don't ignore errors in workspace manifest][cargo/3409]
2256 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
2261 * [Test runners (binaries built with `--test`) now support a `--list` argument
2262 that lists the tests it contains][38185]
2263 * [Test runners now support a `--exact` argument that makes the test filter
2264 match exactly, instead of matching only a substring of the test name][38181]
2265 * [rustdoc supports a `--playground-url` flag][37763]
2266 * [rustdoc provides more details about `#[should_panic]` errors][37749]
2271 * [The Rust build system is now written in Rust][37817]. The Makefiles may
2272 continue to be used in this release by passing `--disable-rustbuild` to the
2273 configure script, but they will be deleted soon. Note that the new build
2274 system uses a different on-disk layout that will likely affect any scripts
2276 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
2278 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
2279 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
2285 * [A number of minor changes to name resolution have been activated][37127].
2286 They add up to more consistent semantics, allowing for future evolution of
2287 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2288 details of what is different. The breaking changes here have been transitioned
2289 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2290 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2291 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2292 should instead check the variable at runtime with `std::env`. That the value
2293 was set at build time was a bug, and incorrect when cross-compiling. This
2294 change is known to cause breakage.
2295 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
2296 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
2297 1.10 and is now an error by default. It will become a hard error in the near
2299 * [The semantics relating modules to file system directories are changing in
2300 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
2301 lint, which is a warning in this release, and will become a hard error in the
2303 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2304 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
2305 the underlying iterator][37834]
2307 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
2308 [33685]: https://github.com/rust-lang/rust/issues/33685
2309 [36868]: https://github.com/rust-lang/rust/pull/36868
2310 [37127]: https://github.com/rust-lang/rust/pull/37127
2311 [37229]: https://github.com/rust-lang/rust/pull/37229
2312 [37456]: https://github.com/rust-lang/rust/pull/37456
2313 [37527]: https://github.com/rust-lang/rust/pull/37527
2314 [37602]: https://github.com/rust-lang/rust/pull/37602
2315 [37613]: https://github.com/rust-lang/rust/pull/37613
2316 [37615]: https://github.com/rust-lang/rust/pull/37615
2317 [37636]: https://github.com/rust-lang/rust/pull/37636
2318 [37627]: https://github.com/rust-lang/rust/pull/37627
2319 [37642]: https://github.com/rust-lang/rust/pull/37642
2320 [37677]: https://github.com/rust-lang/rust/pull/37677
2321 [37699]: https://github.com/rust-lang/rust/pull/37699
2322 [37701]: https://github.com/rust-lang/rust/pull/37701
2323 [37705]: https://github.com/rust-lang/rust/pull/37705
2324 [37749]: https://github.com/rust-lang/rust/pull/37749
2325 [37760]: https://github.com/rust-lang/rust/pull/37760
2326 [37763]: https://github.com/rust-lang/rust/pull/37763
2327 [37764]: https://github.com/rust-lang/rust/pull/37764
2328 [37789]: https://github.com/rust-lang/rust/pull/37789
2329 [37791]: https://github.com/rust-lang/rust/pull/37791
2330 [37814]: https://github.com/rust-lang/rust/pull/37814
2331 [37817]: https://github.com/rust-lang/rust/pull/37817
2332 [37834]: https://github.com/rust-lang/rust/pull/37834
2333 [37848]: https://github.com/rust-lang/rust/pull/37848
2334 [37855]: https://github.com/rust-lang/rust/pull/37855
2335 [37882]: https://github.com/rust-lang/rust/pull/37882
2336 [37888]: https://github.com/rust-lang/rust/pull/37888
2337 [37973]: https://github.com/rust-lang/rust/pull/37973
2338 [37979]: https://github.com/rust-lang/rust/pull/37979
2339 [38086]: https://github.com/rust-lang/rust/pull/38086
2340 [38107]: https://github.com/rust-lang/rust/pull/38107
2341 [38117]: https://github.com/rust-lang/rust/pull/38117
2342 [38134]: https://github.com/rust-lang/rust/pull/38134
2343 [38146]: https://github.com/rust-lang/rust/pull/38146
2344 [38181]: https://github.com/rust-lang/rust/pull/38181
2345 [38182]: https://github.com/rust-lang/rust/pull/38182
2346 [38185]: https://github.com/rust-lang/rust/pull/38185
2347 [38192]: https://github.com/rust-lang/rust/pull/38192
2348 [38279]: https://github.com/rust-lang/rust/pull/38279
2349 [38835]: https://github.com/rust-lang/rust/pull/38835
2350 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2351 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2352 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
2353 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
2354 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
2355 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
2356 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
2357 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
2358 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
2359 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
2360 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
2361 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
2362 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
2363 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
2364 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
2365 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
2366 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
2367 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
2368 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
2369 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
2370 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
2371 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
2372 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
2373 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
2374 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
2375 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
2376 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
2377 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
2378 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
2379 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
2380 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
2381 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
2382 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
2383 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
2384 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
2385 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
2386 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
2387 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
2390 Version 1.14.0 (2016-12-22)
2391 ===========================
2396 * [`..` matches multiple tuple fields in enum variants, structs
2397 and tuples][36843]. [RFC 1492].
2398 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
2399 * [`use *` and `use ::*` both glob-import from the crate root][37367]
2400 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
2401 dereferencing][36822]
2406 * [Mark enums with non-zero discriminant as non-zero][37224]
2407 * [Lower-case `static mut` names are linted like other
2408 statics and consts][37162]
2409 * [Fix ICE on some macros in const integer positions
2410 (e.g. `[u8; m!()]`)][36819]
2411 * [Improve error message and snippet for "did you mean `x`"][36798]
2412 * [Add a panic-strategy field to the target specification][36794]
2413 * [Include LLVM version in `--version --verbose`][37200]
2415 Compile-time Optimizations
2416 --------------------------
2418 * [Improve macro expansion performance][37569]
2419 * [Shrink `Expr_::ExprInlineAsm`][37445]
2420 * [Replace all uses of SHA-256 with BLAKE2b][37439]
2421 * [Reduce the number of bytes hashed by `IchHasher`][37427]
2422 * [Avoid more allocations when compiling html5ever][37373]
2423 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
2424 * [Avoid some allocations in the macro parser][37318]
2425 * [Use a faster deflate setting][37298]
2426 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
2427 during interning of slices][37270]
2428 * [Optimize `write_metadata`][37267]
2429 * [Don't process obligation forest cycles when stalled][37231]
2430 * [Avoid many `CrateConfig` clones][37161]
2431 * [Optimize `Substs::super_fold_with`][37108]
2432 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
2433 * [Speed up `plug_leaks`][36917]
2438 * [`println!()`, with no arguments, prints newline][36825].
2439 Previously, an empty string was required to achieve the same.
2440 * [`Wrapping` impls standard binary and unary operators, as well as
2441 the `Sum` and `Product` iterators][37356]
2442 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
2444 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
2445 `VecDeque` iterators][37315]
2446 * [Improve `SipHasher` performance on small values][37312]
2447 * [Add Iterator trait TrustedLen to enable better FromIterator /
2449 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
2450 * [`ReadDir` implements `Debug`][37221]
2451 * [Implement `RefUnwindSafe` for atomic types][37178]
2452 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
2453 * [Avoid allocations in `Decoder::read_str`][37064]
2454 * [`io::Error` implements `From<io::ErrorKind>`][37037]
2455 * [Impl `Debug` for raw pointers to unsized data][36880]
2456 * [Don't reuse `HashMap` random seeds][37470]
2457 * [The internal memory layout of `HashMap` is more cache-friendly, for
2458 significant improvements in some operations][36692]
2459 * [`HashMap` uses less memory on 32-bit architectures][36595]
2460 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
2465 * [Expose rustc cfg values to build scripts][cargo/3243]
2466 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
2467 * [Fix passing --features when testing multiple packages][cargo/3280]
2468 * [Use a single profile set per workspace][cargo/3249]
2469 * [Load `replace` sections from lock files][cargo/3220]
2470 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
2475 * [rustup is the recommended Rust installation method][1.14rustup]
2476 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
2477 S390x. These are [tier 2] platforms and may have major defects. Follow the
2478 instructions on the website to install, or add the targets to an existing
2479 installation with `rustup target add`. The new target triples are:
2480 - `mips-unknown-linux-gnu`
2481 - `mipsel-unknown-linux-gnu`
2482 - `mips64-unknown-linux-gnuabi64`
2483 - `mips64el-unknown-linux-gnuabi64 `
2484 - `powerpc-unknown-linux-gnu`
2485 - `powerpc64-unknown-linux-gnu`
2486 - `powerpc64le-unknown-linux-gnu`
2487 - `s390x-unknown-linux-gnu `
2488 * This release includes target (std) builds for ARM Linux running MUSL
2489 libc. These are [tier 2] platforms and may have major defects. Add the
2490 following triples to an existing rustup installation with `rustup target add`:
2491 - `arm-unknown-linux-musleabi`
2492 - `arm-unknown-linux-musleabihf`
2493 - `armv7-unknown-linux-musleabihf`
2494 * This release includes [experimental support for WebAssembly][1.14wasm], via
2495 the `wasm32-unknown-emscripten` target. This target is known to have major
2496 defects. Please test, report, and fix.
2497 * rustup no longer installs documentation by default. Run `rustup
2498 component add rust-docs` to install.
2499 * [Fix line stepping in debugger][37310]
2500 * [Enable line number debuginfo in releases][37280]
2505 * [Disable jemalloc on aarch64/powerpc/mips][37392]
2506 * [Add support for Fuchsia OS][37313]
2507 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
2512 * [A number of forward-compatibility lints used by the compiler
2513 to gradually introduce language changes have been converted
2514 to deny by default][36894]:
2515 - ["use of inaccessible extern crate erroneously allowed"][36886]
2516 - ["type parameter default erroneously allowed in invalid location"][36887]
2517 - ["detects super or self keywords at the beginning of global path"][36888]
2518 - ["two overlapping inherent impls define an item with the same name
2519 were erroneously allowed"][36889]
2520 - ["floating-point constants cannot be used in patterns"][36890]
2521 - ["constants of struct or enum type can only be used in a pattern if
2522 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
2523 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
2524 * [Prohibit patterns in trait methods without bodies][37378]
2525 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
2526 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
2527 * [The `$crate` macro variable is accepted in fewer locations][37213]
2528 * [Impls specifying extra region requirements beyond the trait
2529 they implement are rejected][37167]
2530 * [Enums may not be unsized][37111]. Unsized enums are intended to
2531 work but never have. For now they are forbidden.
2532 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
2534 [tier 2]: https://forge.rust-lang.org/platform-support.html
2535 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
2536 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
2537 [36430]: https://github.com/rust-lang/rust/pull/36430
2538 [36595]: https://github.com/rust-lang/rust/pull/36595
2539 [36595]: https://github.com/rust-lang/rust/pull/36595
2540 [36692]: https://github.com/rust-lang/rust/pull/36692
2541 [36767]: https://github.com/rust-lang/rust/pull/36767
2542 [36794]: https://github.com/rust-lang/rust/pull/36794
2543 [36798]: https://github.com/rust-lang/rust/pull/36798
2544 [36819]: https://github.com/rust-lang/rust/pull/36819
2545 [36822]: https://github.com/rust-lang/rust/pull/36822
2546 [36825]: https://github.com/rust-lang/rust/pull/36825
2547 [36843]: https://github.com/rust-lang/rust/pull/36843
2548 [36880]: https://github.com/rust-lang/rust/pull/36880
2549 [36886]: https://github.com/rust-lang/rust/issues/36886
2550 [36887]: https://github.com/rust-lang/rust/issues/36887
2551 [36888]: https://github.com/rust-lang/rust/issues/36888
2552 [36889]: https://github.com/rust-lang/rust/issues/36889
2553 [36890]: https://github.com/rust-lang/rust/issues/36890
2554 [36891]: https://github.com/rust-lang/rust/issues/36891
2555 [36892]: https://github.com/rust-lang/rust/issues/36892
2556 [36894]: https://github.com/rust-lang/rust/pull/36894
2557 [36917]: https://github.com/rust-lang/rust/pull/36917
2558 [36993]: https://github.com/rust-lang/rust/pull/36993
2559 [37037]: https://github.com/rust-lang/rust/pull/37037
2560 [37064]: https://github.com/rust-lang/rust/pull/37064
2561 [37094]: https://github.com/rust-lang/rust/pull/37094
2562 [37108]: https://github.com/rust-lang/rust/pull/37108
2563 [37111]: https://github.com/rust-lang/rust/pull/37111
2564 [37161]: https://github.com/rust-lang/rust/pull/37161
2565 [37162]: https://github.com/rust-lang/rust/pull/37162
2566 [37167]: https://github.com/rust-lang/rust/pull/37167
2567 [37178]: https://github.com/rust-lang/rust/pull/37178
2568 [37200]: https://github.com/rust-lang/rust/pull/37200
2569 [37213]: https://github.com/rust-lang/rust/pull/37213
2570 [37221]: https://github.com/rust-lang/rust/pull/37221
2571 [37224]: https://github.com/rust-lang/rust/pull/37224
2572 [37230]: https://github.com/rust-lang/rust/pull/37230
2573 [37231]: https://github.com/rust-lang/rust/pull/37231
2574 [37247]: https://github.com/rust-lang/rust/pull/37247
2575 [37267]: https://github.com/rust-lang/rust/pull/37267
2576 [37270]: https://github.com/rust-lang/rust/pull/37270
2577 [37273]: https://github.com/rust-lang/rust/pull/37273
2578 [37280]: https://github.com/rust-lang/rust/pull/37280
2579 [37298]: https://github.com/rust-lang/rust/pull/37298
2580 [37306]: https://github.com/rust-lang/rust/pull/37306
2581 [37310]: https://github.com/rust-lang/rust/pull/37310
2582 [37312]: https://github.com/rust-lang/rust/pull/37312
2583 [37313]: https://github.com/rust-lang/rust/pull/37313
2584 [37315]: https://github.com/rust-lang/rust/pull/37315
2585 [37318]: https://github.com/rust-lang/rust/pull/37318
2586 [37322]: https://github.com/rust-lang/rust/pull/37322
2587 [37326]: https://github.com/rust-lang/rust/pull/37326
2588 [37351]: https://github.com/rust-lang/rust/pull/37351
2589 [37356]: https://github.com/rust-lang/rust/pull/37356
2590 [37367]: https://github.com/rust-lang/rust/pull/37367
2591 [37373]: https://github.com/rust-lang/rust/pull/37373
2592 [37378]: https://github.com/rust-lang/rust/pull/37378
2593 [37389]: https://github.com/rust-lang/rust/pull/37389
2594 [37392]: https://github.com/rust-lang/rust/pull/37392
2595 [37427]: https://github.com/rust-lang/rust/pull/37427
2596 [37439]: https://github.com/rust-lang/rust/pull/37439
2597 [37445]: https://github.com/rust-lang/rust/pull/37445
2598 [37470]: https://github.com/rust-lang/rust/pull/37470
2599 [37569]: https://github.com/rust-lang/rust/pull/37569
2600 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2601 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
2602 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
2603 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
2604 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
2605 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
2606 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
2609 Version 1.13.0 (2016-11-10)
2610 ===========================
2615 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
2616 errors, like the `try!` macro, described in [RFC 0243].
2617 * [Stabilize macros in type position][36014]. Described in [RFC 873].
2618 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
2619 * [Fix `#[derive]` for empty tuple structs/variants][35728]
2620 * [Fix lifetime rules for 'if' conditions][36029]
2621 * [Avoid loading and parsing unconfigured non-inline modules][36482]
2626 * [Add the `-C link-arg` argument][36574]
2627 * [Remove the old AST-based backend from rustc_trans][35764]
2628 * [Don't enable NEON by default on armv7 Linux][35814]
2629 * [Fix debug line number info for macro expansions][35238]
2630 * [Do not emit "class method" debuginfo for types that are not
2631 DICompositeType][36008]
2632 * [Warn about multiple conflicting #[repr] hints][34623]
2633 * [When sizing DST, don't double-count nested struct prefixes][36351]
2634 * [Default RUST_MIN_STACK to 16MiB for now][36505]
2635 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
2636 * [Reject macros with empty repetitions to avoid infinite loop][36721]
2637 * [Expand macros without recursing to avoid stack overflows][36214]
2642 * [Replace macro backtraces with labeled local uses][35702]
2643 * [Improve error message for misplaced doc comments][33922]
2644 * [Buffer unix and lock windows to prevent message interleaving][35975]
2645 * [Update lifetime errors to specifically note temporaries][36171]
2646 * [Special case a few colors for Windows][36178]
2647 * [Suggest `use self` when such an import resolves][36289]
2648 * [Be more specific when type parameter shadows primitive type][36338]
2649 * Many minor improvements
2651 Compile-time Optimizations
2652 --------------------------
2654 * [Compute and cache HIR hashes at beginning][35854]
2655 * [Don't hash types in loan paths][36004]
2656 * [Cache projections in trans][35761]
2657 * [Optimize the parser's last token handling][36527]
2658 * [Only instantiate #[inline] functions in codegen units referencing
2659 them][36524]. This leads to big improvements in cases where crates export
2660 define many inline functions without using them directly.
2661 * [Lazily allocate TypedArena's first chunk][36592]
2662 * [Don't allocate during default HashSet creation][36734]
2669 * [`overflowing_abs`]
2670 * [`RefCell::try_borrow`]
2671 * [`RefCell::try_borrow_mut`]
2676 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
2677 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
2679 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
2680 * [Implement `Debug` for `std::vec::IntoIter`][35707]
2681 * [`CString`: avoid excessive growth just to 0-terminate][35871]
2682 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
2683 * [Use arc4rand on FreeBSD][35884]
2684 * [memrchr: Correct aligned offset computation][35969]
2685 * [Improve Demangling of Rust Symbols][36059]
2686 * [Use monotonic time in condition variables][35048]
2687 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
2688 * [Implement conversion traits for `char`][35755]
2689 * [Fix illegal instruction caused by overflow in channel cloning][36104]
2690 * [Zero first byte of CString on drop][36264]
2691 * [Inherit overflow checks for sum and product][36372]
2692 * [Add missing Eq implementations][36423]
2693 * [Implement `Debug` for `DirEntry`][36631]
2694 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
2696 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2697 * [Implement more traits for `std::io::ErrorKind`][35911]
2698 * [Optimize BinaryHeap bounds checking][36072]
2699 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
2700 `extend_with_element`][36355]
2701 * [Fix overflow checking in unsigned pow()][34942]
2706 * This release includes security fixes to both curl and OpenSSL.
2707 * [Fix transitive doctests when panic=abort][cargo/3021]
2708 * [Add --all-features flag to cargo][cargo/3038]
2709 * [Reject path-based dependencies in `cargo package`][cargo/3060]
2710 * [Don't parse the home directory more than once][cargo/3078]
2711 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
2712 * [Update OpenSSL to 1.0.2j][cargo/3121]
2713 * [Add license and license_file to cargo metadata output][cargo/3110]
2714 * [Make crates-io registry URL optional in config; ignore all changes to
2715 source.crates-io][cargo/3089]
2716 * [Don't download dependencies from other platforms][cargo/3123]
2717 * [Build transitive dev-dependencies when needed][cargo/3125]
2718 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
2719 * [Avoid updating registry when adding existing deps][cargo/3144]
2720 * [Warn about path overrides that won't work][cargo/3136]
2721 * [Use workspaces during `cargo install`][cargo/3146]
2722 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
2723 * [Add --message-format flag][cargo/3000]
2724 * [Pass target environment for rustdoc][cargo/3205]
2725 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
2726 * [Update curl and curl-sys][cargo/3241]
2727 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
2732 * [rustdoc: Add the `--sysroot` argument][36586]
2733 * [rustdoc: Fix a couple of issues with the search results][35655]
2734 * [rustdoc: remove the `!` from macro URLs and titles][35234]
2735 * [gdb: Fix pretty-printing special-cased Rust types][35585]
2736 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
2741 * [Remove unmaintained style guide][35124]
2742 * [Add s390x support][36369]
2743 * [Initial work at Haiku OS support][36727]
2744 * [Add mips-uclibc targets][35734]
2745 * [Crate-ify compiler-rt into compiler-builtins][35021]
2746 * [Add rustc version info (git hash + date) to dist tarball][36213]
2747 * Many documentation improvements
2752 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2753 * [Deny (by default) transmuting from fn item types to pointer-sized
2754 types][34923]. Continuing the long transition to zero-sized fn items,
2756 * [Fix `#[derive]` for empty tuple structs/variants][35728].
2758 * [Issue deprecation warnings for safe accesses to extern statics][36173]
2759 * [Fix lifetime rules for 'if' conditions][36029].
2760 * [Inherit overflow checks for sum and product][36372].
2761 * [Forbid user-defined macros named "macro_rules"][36730].
2763 [33922]: https://github.com/rust-lang/rust/pull/33922
2764 [34623]: https://github.com/rust-lang/rust/pull/34623
2765 [34923]: https://github.com/rust-lang/rust/pull/34923
2766 [34942]: https://github.com/rust-lang/rust/pull/34942
2767 [34982]: https://github.com/rust-lang/rust/pull/34982
2768 [35021]: https://github.com/rust-lang/rust/pull/35021
2769 [35048]: https://github.com/rust-lang/rust/pull/35048
2770 [35074]: https://github.com/rust-lang/rust/pull/35074
2771 [35124]: https://github.com/rust-lang/rust/pull/35124
2772 [35234]: https://github.com/rust-lang/rust/pull/35234
2773 [35238]: https://github.com/rust-lang/rust/pull/35238
2774 [35354]: https://github.com/rust-lang/rust/pull/35354
2775 [35559]: https://github.com/rust-lang/rust/pull/35559
2776 [35585]: https://github.com/rust-lang/rust/pull/35585
2777 [35627]: https://github.com/rust-lang/rust/pull/35627
2778 [35655]: https://github.com/rust-lang/rust/pull/35655
2779 [35702]: https://github.com/rust-lang/rust/pull/35702
2780 [35707]: https://github.com/rust-lang/rust/pull/35707
2781 [35728]: https://github.com/rust-lang/rust/pull/35728
2782 [35734]: https://github.com/rust-lang/rust/pull/35734
2783 [35755]: https://github.com/rust-lang/rust/pull/35755
2784 [35761]: https://github.com/rust-lang/rust/pull/35761
2785 [35764]: https://github.com/rust-lang/rust/pull/35764
2786 [35814]: https://github.com/rust-lang/rust/pull/35814
2787 [35854]: https://github.com/rust-lang/rust/pull/35854
2788 [35871]: https://github.com/rust-lang/rust/pull/35871
2789 [35884]: https://github.com/rust-lang/rust/pull/35884
2790 [35911]: https://github.com/rust-lang/rust/pull/35911
2791 [35969]: https://github.com/rust-lang/rust/pull/35969
2792 [35975]: https://github.com/rust-lang/rust/pull/35975
2793 [36004]: https://github.com/rust-lang/rust/pull/36004
2794 [36008]: https://github.com/rust-lang/rust/pull/36008
2795 [36014]: https://github.com/rust-lang/rust/pull/36014
2796 [36029]: https://github.com/rust-lang/rust/pull/36029
2797 [36059]: https://github.com/rust-lang/rust/pull/36059
2798 [36072]: https://github.com/rust-lang/rust/pull/36072
2799 [36101]: https://github.com/rust-lang/rust/pull/36101
2800 [36104]: https://github.com/rust-lang/rust/pull/36104
2801 [36171]: https://github.com/rust-lang/rust/pull/36171
2802 [36173]: https://github.com/rust-lang/rust/pull/36173
2803 [36178]: https://github.com/rust-lang/rust/pull/36178
2804 [36213]: https://github.com/rust-lang/rust/pull/36213
2805 [36214]: https://github.com/rust-lang/rust/pull/36214
2806 [36264]: https://github.com/rust-lang/rust/pull/36264
2807 [36266]: https://github.com/rust-lang/rust/pull/36266
2808 [36289]: https://github.com/rust-lang/rust/pull/36289
2809 [36338]: https://github.com/rust-lang/rust/pull/36338
2810 [36351]: https://github.com/rust-lang/rust/pull/36351
2811 [36355]: https://github.com/rust-lang/rust/pull/36355
2812 [36369]: https://github.com/rust-lang/rust/pull/36369
2813 [36372]: https://github.com/rust-lang/rust/pull/36372
2814 [36423]: https://github.com/rust-lang/rust/pull/36423
2815 [36482]: https://github.com/rust-lang/rust/pull/36482
2816 [36505]: https://github.com/rust-lang/rust/pull/36505
2817 [36524]: https://github.com/rust-lang/rust/pull/36524
2818 [36527]: https://github.com/rust-lang/rust/pull/36527
2819 [36551]: https://github.com/rust-lang/rust/pull/36551
2820 [36574]: https://github.com/rust-lang/rust/pull/36574
2821 [36586]: https://github.com/rust-lang/rust/pull/36586
2822 [36592]: https://github.com/rust-lang/rust/pull/36592
2823 [36631]: https://github.com/rust-lang/rust/pull/36631
2824 [36639]: https://github.com/rust-lang/rust/pull/36639
2825 [36721]: https://github.com/rust-lang/rust/pull/36721
2826 [36727]: https://github.com/rust-lang/rust/pull/36727
2827 [36730]: https://github.com/rust-lang/rust/pull/36730
2828 [36734]: https://github.com/rust-lang/rust/pull/36734
2829 [36754]: https://github.com/rust-lang/rust/pull/36754
2830 [36995]: https://github.com/rust-lang/rust/pull/36995
2831 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
2832 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
2833 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2834 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
2835 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
2836 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
2837 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
2838 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
2839 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
2840 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
2841 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
2842 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
2843 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
2844 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
2845 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
2846 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
2847 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
2848 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
2849 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
2850 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
2851 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
2852 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
2853 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
2854 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
2855 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
2856 [rustup]: https://www.rustup.rs
2857 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
2858 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
2859 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
2860 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
2861 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
2862 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
2863 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
2866 Version 1.12.1 (2016-10-20)
2867 ===========================
2872 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
2873 * [Confusion with double negation and booleans][36856]
2874 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
2875 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
2876 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
2877 * [Corrupted memory after updated to 1.12][36936]
2878 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
2879 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
2880 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
2882 [36381]: https://github.com/rust-lang/rust/issues/36381
2883 [36856]: https://github.com/rust-lang/rust/issues/36856
2884 [36875]: https://github.com/rust-lang/rust/issues/36875
2885 [36924]: https://github.com/rust-lang/rust/issues/36924
2886 [36926]: https://github.com/rust-lang/rust/issues/36926
2887 [36936]: https://github.com/rust-lang/rust/issues/36936
2888 [37026]: https://github.com/rust-lang/rust/issues/37026
2889 [37112]: https://github.com/rust-lang/rust/issues/37112
2890 [37153]: https://github.com/rust-lang/rust/issues/37153
2893 Version 1.12.0 (2016-09-29)
2894 ===========================
2899 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2900 This translation pass is far simpler than the previous AST->LLVM pass, and
2901 creates opportunities to perform new optimizations directly on the MIR. It
2902 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2903 * [`rustc` presents a new, more readable error format, along with
2904 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2905 Most common editors supporting Rust have been updated to work with it. It was
2906 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2911 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2912 This translation pass is far simpler than the previous AST->LLVM pass, and
2913 creates opportunities to perform new optimizations directly on the MIR. It
2914 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2915 * [Print the Rust target name, not the LLVM target name, with
2916 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
2917 * [The computation of `TypeId` is correct in some cases where it was previously
2918 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
2919 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
2920 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
2921 `--print relocation-models`, and `--print code-models` print the available
2922 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
2923 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
2924 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
2925 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
2926 These targets produce statically-linked binaries. There are no binary release
2932 * [`rustc` presents a new, more readable error format, along with
2933 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2934 Most common editors supporting Rust have been updated to work with it. It was
2935 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2936 * [In error descriptions, references are now described in plain English,
2937 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
2938 * [In error type descriptions, unknown numeric types are named `{integer}` or
2939 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
2940 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
2945 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
2946 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
2947 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
2948 useful](https://github.com/rust-lang/rust/pull/34908)
2949 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
2950 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
2951 * [Semicolons are properly required as statement delimiters inside
2952 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
2953 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2958 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
2959 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
2960 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
2961 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
2962 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
2963 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
2964 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
2965 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
2966 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
2967 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
2968 Both on Unix and Windows.
2969 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
2970 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
2971 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
2972 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
2973 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
2974 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
2975 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
2976 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
2981 * [The `format!` macro and friends now allow a single argument to be formatted
2982 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
2983 * [The lifetime bounds on `[T]::binary_search_by` and
2984 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
2985 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
2986 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
2987 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
2988 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
2989 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
2990 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
2991 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
2992 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
2993 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
2994 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
2995 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
2996 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
2997 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
2998 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
2999 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
3000 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
3001 * [`mpsc::sync_channel` `Receiver`s return any available message before
3002 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
3003 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
3004 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
3009 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
3010 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
3011 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
3012 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
3013 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
3014 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
3015 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
3016 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
3017 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
3018 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
3019 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
3020 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
3021 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
3022 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
3023 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
3024 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
3029 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
3030 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
3035 * [Test binaries now support a `--test-threads` argument to specify the number
3036 of threads used to run tests, and which acts the same as the
3037 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
3038 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
3039 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
3040 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
3041 * [Rust releases now come with source packages that can be installed by rustup
3042 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
3043 The resulting source code can be used by tools and IDES, located in the
3044 sysroot under `lib/rustlib/src`.
3049 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
3050 * Many minor improvements to the documentation.
3051 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
3056 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
3057 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
3058 * [When formatting strings, if "precision" is specified, the "fill",
3059 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
3060 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
3063 Version 1.11.0 (2016-08-18)
3064 ===========================
3069 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
3070 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
3071 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
3072 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
3073 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
3078 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
3079 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
3080 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
3081 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
3082 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
3083 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
3084 (in libcore - previously stabilized in libstd)
3085 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
3086 (in libcore - previously stabilized in libstd)
3087 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
3088 (in libcore - previously stabilized in libstd)
3089 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
3090 (in libcore - previously stabilized in libstd)
3091 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3092 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3093 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
3094 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
3099 * [The `thread_local!` macro supports multiple definitions in a single
3100 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
3101 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
3102 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
3103 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
3104 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
3105 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
3106 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
3107 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
3112 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
3113 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
3114 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
3115 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
3116 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
3117 and `-vv` prints warnings for all crates.
3118 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
3119 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
3120 This provides room for expansion by arbitrary tools.
3121 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
3122 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
3123 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
3124 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
3125 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
3126 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
3127 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
3132 * [Caching projections speeds up type check dramatically for some
3133 workloads](https://github.com/rust-lang/rust/pull/33816)
3134 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
3135 This hasher is faster, but is believed to provide sufficient
3136 protection from collision attacks.
3137 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
3142 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
3143 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
3144 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
3145 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
3146 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
3151 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
3152 * [When emitting debug info, rustc emits frame pointers for closures,
3153 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
3154 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
3155 * Many more errors have been given error codes and extended
3157 * API documentation continues to be improved, with many new examples
3162 * [rustc no longer hangs when dependencies recursively re-export
3163 submodules](https://github.com/rust-lang/rust/pull/34542)
3164 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
3165 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
3166 rewritten](https://github.com/rust-lang/rust/pull/33895)
3167 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
3168 No targets use this yet, but it works toward AVR support.
3173 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
3174 * [The new follow-set rules that place restrictions on `macro_rules!`
3175 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
3176 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
3177 and has been a warning since 1.10.
3178 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
3179 This causes breakage in some corner cases.
3182 Version 1.10.0 (2016-07-07)
3183 ===========================
3188 * [Allow `concat_idents!` in type positions as well as in expression
3189 positions](https://github.com/rust-lang/rust/pull/33735).
3190 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
3191 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
3192 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
3193 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
3194 * [`panic!` can be converted to a runtime abort with the
3195 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
3196 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3197 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
3198 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
3199 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-cdylib.md).
3200 Note that Cargo does not yet directly support cdylibs.
3205 * `os::windows::fs::OpenOptionsExt::access_mode`
3206 * `os::windows::fs::OpenOptionsExt::share_mode`
3207 * `os::windows::fs::OpenOptionsExt::custom_flags`
3208 * `os::windows::fs::OpenOptionsExt::attributes`
3209 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
3210 * `os::unix::fs::OpenOptionsExt::custom_flags`
3211 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
3212 * `Default for sync::Weak`
3213 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
3214 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
3215 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
3216 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
3217 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
3218 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
3219 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
3220 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
3221 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
3222 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
3223 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
3224 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
3225 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
3226 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
3227 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
3228 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
3229 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
3230 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
3231 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
3232 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
3233 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
3234 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
3235 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
3236 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
3237 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
3238 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
3239 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
3240 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
3241 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
3242 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
3243 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
3244 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
3245 * Read/Write/RawFd impls for `UnixStream`
3246 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
3247 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
3248 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
3249 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
3250 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
3251 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
3252 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
3253 * RawFd impls for `UnixListener`
3254 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
3255 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
3256 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
3257 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
3258 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
3259 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
3260 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
3261 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
3262 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
3263 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
3264 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
3265 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
3266 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
3267 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
3268 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
3269 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
3270 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
3271 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
3272 * RawFd impls for `UnixDatagram`
3273 * `{BTree,Hash}Map::values_mut`
3274 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/std/primitive.slice.html#method.binary_search_by_key)
3279 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
3280 The semantics of this minor method are subtle and probably not what
3282 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
3283 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
3284 will fall back to `/dev/urandom` temporarily to avoid blocking
3285 during early boot](https://github.com/rust-lang/rust/pull/33086).
3286 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
3287 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
3288 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
3289 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
3290 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
3291 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
3292 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
3296 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
3297 This controls the runtime behavior of the `panic!` macro
3298 and can be either "unwind" (the default), or "abort".
3299 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3300 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
3301 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
3302 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
3303 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
3304 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
3305 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
3306 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
3307 By default they are retried twice, which can be customized with the
3308 `net.retry` value in `.cargo/config`.
3309 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
3310 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
3311 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
3312 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
3313 Makes it possible to install multiple crates in parallel.
3314 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
3315 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
3316 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
3317 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
3318 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
3319 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
3324 * [rustc memory usage was reduced by refactoring the context used for
3325 type checking](https://github.com/rust-lang/rust/pull/33425).
3326 * [Speed up creation of `HashMap`s by caching the random keys used
3327 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
3328 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
3329 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
3330 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
3331 10x faster than the previous lookup tables.
3332 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
3337 * Many incremental improvements to documentation and rustdoc.
3338 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
3339 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
3340 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
3341 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
3342 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
3343 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
3344 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
3349 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
3350 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
3351 * [`std` no longer prints backtraces on platforms where the running
3352 module must be loaded with `env::current_exe`, which can't be relied
3353 on](https://github.com/rust-lang/rust/pull/33554).
3354 * This release includes std binaries for the i586-unknown-linux-gnu,
3355 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
3356 i586 target is for old x86 hardware without SSE2, and the armv7
3357 target is for Android running on modern ARM architectures.
3358 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
3359 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
3360 * [On Unix the runtime aborts by calling `libc::abort` instead of
3361 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
3362 * [Rust is now bootstrapped from the previous release of Rust,
3363 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
3368 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
3369 * [`target_env` for Linux ARM targets is just `gnu`, not
3370 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
3371 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
3372 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
3373 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
3374 Affects how macros are parsed.
3375 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
3376 * [Feature-gated attributes on macro-generated macro invocations are
3377 now rejected](https://github.com/rust-lang/rust/pull/32791).
3378 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
3379 This caused some minor changes to type inference.
3382 Version 1.9.0 (2016-05-26)
3383 ==========================
3388 * The `#[deprecated]` attribute when applied to an API will generate
3389 warnings when used. The warnings may be suppressed with
3390 `#[allow(deprecated)]`. [RFC 1270].
3391 * [`fn` item types are zero sized, and each `fn` names a unique
3392 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3393 `transmute` on a `fn` type will generate a warning for a few cycles,
3394 then will be converted to an error.
3395 * [Field and method resolution understand visibility, so private
3396 fields and methods cannot prevent the proper use of public fields
3397 and methods][1.9fv].
3398 * [The parser considers unicode codepoints in the
3399 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
3405 * [`std::panic::catch_unwind`][] (renamed from `recover`)
3406 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
3407 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
3408 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
3409 * [`str::is_char_boundary`]
3410 * [`<*const T>::as_ref`]
3411 * [`<*mut T>::as_ref`]
3412 * [`<*mut T>::as_mut`]
3413 * [`AsciiExt::make_ascii_uppercase`]
3414 * [`AsciiExt::make_ascii_lowercase`]
3415 * [`char::decode_utf16`]
3416 * [`char::DecodeUtf16`]
3417 * [`char::DecodeUtf16Error`]
3418 * [`char::DecodeUtf16Error::unpaired_surrogate`]
3419 * [`BTreeSet::take`]
3420 * [`BTreeSet::replace`]
3423 * [`HashSet::replace`]
3425 * [`OsString::with_capacity`]
3426 * [`OsString::clear`]
3427 * [`OsString::capacity`]
3428 * [`OsString::reserve`]
3429 * [`OsString::reserve_exact`]
3430 * [`OsStr::is_empty`]
3432 * [`std::os::unix::thread`]
3435 * [`JoinHandleExt::as_pthread_t`]
3436 * [`JoinHandleExt::into_pthread_t`]
3437 * [`HashSet::hasher`]
3438 * [`HashMap::hasher`]
3439 * [`CommandExt::exec`]
3440 * [`File::try_clone`]
3441 * [`SocketAddr::set_ip`]
3442 * [`SocketAddr::set_port`]
3443 * [`SocketAddrV4::set_ip`]
3444 * [`SocketAddrV4::set_port`]
3445 * [`SocketAddrV6::set_ip`]
3446 * [`SocketAddrV6::set_port`]
3447 * [`SocketAddrV6::set_flowinfo`]
3448 * [`SocketAddrV6::set_scope_id`]
3449 * [`slice::copy_from_slice`]
3450 * [`ptr::read_volatile`]
3451 * [`ptr::write_volatile`]
3452 * [`OpenOptions::create_new`]
3453 * [`TcpStream::set_nodelay`]
3454 * [`TcpStream::nodelay`]
3455 * [`TcpStream::set_ttl`]
3456 * [`TcpStream::ttl`]
3457 * [`TcpStream::set_only_v6`]
3458 * [`TcpStream::only_v6`]
3459 * [`TcpStream::take_error`]
3460 * [`TcpStream::set_nonblocking`]
3461 * [`TcpListener::set_ttl`]
3462 * [`TcpListener::ttl`]
3463 * [`TcpListener::set_only_v6`]
3464 * [`TcpListener::only_v6`]
3465 * [`TcpListener::take_error`]
3466 * [`TcpListener::set_nonblocking`]
3467 * [`UdpSocket::set_broadcast`]
3468 * [`UdpSocket::broadcast`]
3469 * [`UdpSocket::set_multicast_loop_v4`]
3470 * [`UdpSocket::multicast_loop_v4`]
3471 * [`UdpSocket::set_multicast_ttl_v4`]
3472 * [`UdpSocket::multicast_ttl_v4`]
3473 * [`UdpSocket::set_multicast_loop_v6`]
3474 * [`UdpSocket::multicast_loop_v6`]
3475 * [`UdpSocket::set_multicast_ttl_v6`]
3476 * [`UdpSocket::multicast_ttl_v6`]
3477 * [`UdpSocket::set_ttl`]
3478 * [`UdpSocket::ttl`]
3479 * [`UdpSocket::set_only_v6`]
3480 * [`UdpSocket::only_v6`]
3481 * [`UdpSocket::join_multicast_v4`]
3482 * [`UdpSocket::join_multicast_v6`]
3483 * [`UdpSocket::leave_multicast_v4`]
3484 * [`UdpSocket::leave_multicast_v6`]
3485 * [`UdpSocket::take_error`]
3486 * [`UdpSocket::connect`]
3487 * [`UdpSocket::send`]
3488 * [`UdpSocket::recv`]
3489 * [`UdpSocket::set_nonblocking`]
3494 * [`std::sync::Once` is poisoned if its initialization function
3496 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
3497 * [Most types implement `fmt::Debug`][1.9db].
3498 * [The default buffer size used by `BufReader` and `BufWriter` was
3499 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
3500 used by other languages.
3501 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
3502 `Duration` additionally implements `*=` and `/=`][1.9ta].
3503 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
3504 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
3505 * [`Chain` implements `BufRead`][1.9ch].
3506 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
3511 * [Cargo can now run concurrently][1.9cc].
3512 * [Top-level overrides allow specific revisions of crates to be
3513 overridden through the entire crate graph][1.9ct]. This is intended
3514 to make upgrades easier for large projects, by allowing crates to be
3515 forked temporarily until they've been upgraded and republished.
3516 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
3517 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
3518 on the commandline][1.9cf]. `rustc` arguments can also be specified
3519 in the `build.rustflags` configuration key.
3524 * [The time complexity of comparing variables for equivalence during type
3525 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
3526 to major compilation time improvement in some scenarios.
3527 * [`ToString` is specialized for `str`, giving it the same performance
3528 as `to_owned`][1.9ts].
3529 * [Spawning processes with `Command::output` no longer creates extra
3531 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
3532 for C-like enums][1.9cl].
3537 * [Passing the `--quiet` flag to a test runner will produce
3538 much-abbreviated output][1.9q].
3539 * The Rust Project now publishes std binaries for the
3540 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
3541 `i586-pc-windows-msvc` targets.
3546 * [`std::sync::Once` is poisoned if its initialization function
3548 * [It is illegal to define methods with the same name in overlapping
3549 inherent `impl` blocks][1.9sn].
3550 * [`fn` item types are zero sized, and each `fn` names a unique
3551 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3552 `transmute` on a `fn` type will generate a warning for a few cycles,
3553 then will be converted to an error.
3554 * [Improvements to const evaluation may trigger new errors when integer
3555 literals are out of range][1.9ce].
3558 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
3559 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
3560 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
3561 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
3562 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
3563 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
3564 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
3565 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
3566 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
3567 [1.9db]: https://github.com/rust-lang/rust/pull/32054
3568 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
3569 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
3570 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
3571 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
3572 [1.9o]: https://github.com/rust-lang/rust/pull/32325
3573 [1.9q]: https://github.com/rust-lang/rust/pull/31887
3574 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
3575 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
3576 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
3577 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
3578 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
3579 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
3580 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
3581 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
3582 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3583 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
3584 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3585 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
3586 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
3587 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
3588 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
3589 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
3590 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
3591 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
3592 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
3593 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
3594 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
3595 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
3596 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
3597 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
3598 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
3599 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
3600 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
3601 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
3602 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
3603 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
3604 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
3605 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
3606 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
3607 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
3608 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
3609 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
3610 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
3611 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
3612 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
3613 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
3614 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
3615 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
3616 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
3617 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
3618 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3619 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3620 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3621 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3622 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3623 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3624 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
3625 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3626 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
3627 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3628 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3629 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3630 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3631 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3632 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
3633 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
3634 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
3635 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
3636 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
3637 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
3638 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
3639 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
3640 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
3641 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
3642 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
3643 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
3644 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
3645 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
3646 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
3647 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
3648 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
3649 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
3650 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
3651 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
3652 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
3653 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
3654 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
3655 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
3656 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
3657 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
3658 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
3659 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
3660 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
3661 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
3662 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
3663 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
3664 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
3665 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
3666 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
3667 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
3670 Version 1.8.0 (2016-04-14)
3671 ==========================
3676 * Rust supports overloading of compound assignment statements like
3677 `+=` by implementing the [`AddAssign`], [`SubAssign`],
3678 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
3679 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
3681 * Empty structs can be defined with braces, as in `struct Foo { }`, in
3682 addition to the non-braced form, `struct Foo;`. [RFC 218].
3688 * [`str::encode_utf16`][] (renamed from `utf16_units`)
3689 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
3692 * [`ptr::drop_in_place`]
3694 * [`time::SystemTime`]
3696 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
3697 * [`Instant::elapsed`]
3698 * [`SystemTime::now`]
3699 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
3700 * [`SystemTime::elapsed`]
3701 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
3702 * [`SystemTimeError`]
3703 * [`SystemTimeError::duration`]
3704 * Various impls for `SystemTimeError`
3706 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
3707 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
3708 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
3709 * [The `write!` and `writeln!` macros correctly emit errors if any of
3710 their arguments can't be formatted][1.8w].
3711 * [Various I/O functions support large files on 32-bit Linux][1.8l].
3712 * [The Unix-specific `raw` modules, which contain a number of
3713 redefined C types are deprecated][1.8r], including `os::raw::unix`,
3714 `os::raw::macos`, and `os::raw::linux`. These modules defined types
3715 such as `ino_t` and `dev_t`. The inconsistency of these definitions
3716 across platforms was making it difficult to implement `std`
3717 correctly. Those that need these definitions should use the `libc`
3719 * The Unix-specific `MetadataExt` traits, including
3720 `os::unix::fs::MetadataExt`, which expose values such as inode
3721 numbers [no longer return platform-specific types][1.8r], but
3722 instead return widened integers. [RFC 1415].
3723 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
3724 * [Atomic loads and stores are not volatile][1.8a].
3725 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
3730 * [Inlining hash functions lead to a 3% compile-time improvement in
3731 some workloads][1.8h].
3732 * When using jemalloc, its symbols are [unprefixed so that it
3733 overrides the libc malloc implementation][1.8h]. This means that for
3734 rustc, LLVM is now using jemalloc, which results in a 6%
3735 compile-time improvement on a specific workload.
3736 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
3741 * [32-bit MSVC builds finally implement unwinding][1.8ms].
3742 i686-pc-windows-msvc is now considered a tier-1 platform.
3743 * [The `--print targets` flag prints a list of supported targets][1.8t].
3744 * [The `--print cfg` flag prints the `cfg`s defined for the current
3746 * [`rustc` can be built with an new Cargo-based build system, written
3747 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
3748 build system. To enable it configure with `configure --rustbuild`.
3749 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
3750 variants while also indicating the total number of missing variants
3751 if more than 3][1.8m].
3752 * [Executable stacks are disabled on Linux and BSD][1.8nx].
3753 * The Rust Project now publishes binary releases of the standard
3754 library for a number of tier-2 targets:
3755 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
3756 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
3757 `x86_64-rumprun-netbsd`. These can be installed with
3758 tools such as [multirust][1.8mr].
3763 * [`cargo init` creates a new Cargo project in the current
3764 directory][1.8ci]. It is otherwise like `cargo new`.
3765 * [Cargo has configuration keys for `-v` and
3766 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
3767 `[term]` section of `.cargo/config`.
3768 * [Configuration keys that evaluate to strings or integers can be set
3769 via environment variables][1.8ce]. For example the `build.jobs` key
3770 can be set via `CARGO_BUILD_JOBS`. Environment variables take
3771 precedence over config files.
3772 * [Target-specific dependencies support Rust `cfg` syntax for
3773 describing targets][1.8cfg] so that dependencies for multiple
3774 targets can be specified together. [RFC 1361].
3775 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
3776 `RUSTDOC` take precedence over the `build.target-dir`,
3777 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
3778 * [The child process tree is killed on Windows when Cargo is
3780 * [The `build.target` configuration value sets the target platform,
3781 like `--target`][1.8ct].
3786 * [Unstable compiler flags have been further restricted][1.8u]. Since
3787 1.0 `-Z` flags have been considered unstable, and other flags that
3788 were considered unstable additionally required passing `-Z
3789 unstable-options` to access. Unlike unstable language and library
3790 features though, these options have been accessible on the stable
3791 release channel. Going forward, *new unstable flags will not be
3792 available on the stable release channel*, and old unstable flags
3793 will warn about their usage. In the future, all unstable flags will
3794 be unavailable on the stable release channel.
3795 * [It is no longer possible to `match` on empty enum variants using
3796 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
3797 * The Unix-specific `MetadataExt` traits, including
3798 `os::unix::fs::MetadataExt`, which expose values such as inode
3799 numbers [no longer return platform-specific types][1.8r], but
3800 instead return widened integers. [RFC 1415].
3801 * [Modules sourced from the filesystem cannot appear within arbitrary
3802 blocks, but only within other modules][1.8mf].
3803 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
3804 * On Unix, [stack overflow triggers a runtime abort instead of a
3806 * [`Command::spawn` and its equivalents return an error if any of
3807 its command-line arguments contain interior `NUL`s][1.8n].
3808 * [Tuple and unit enum variants from other crates are in the type
3810 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
3811 type instead of `.a` files][1.8st]. Additionally, for the MSVC
3812 toolchain, `rustc` emits import libraries named `foo.dll.lib`
3813 instead of `foo.lib`.
3816 [1.8a]: https://github.com/rust-lang/rust/pull/30962
3817 [1.8b]: https://github.com/rust-lang/rust/pull/31123
3818 [1.8c]: https://github.com/rust-lang/rust/pull/31530
3819 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
3820 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
3821 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
3822 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
3823 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
3824 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
3825 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
3826 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
3827 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
3828 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
3829 [1.8h]: https://github.com/rust-lang/rust/pull/31460
3830 [1.8l]: https://github.com/rust-lang/rust/pull/31668
3831 [1.8m]: https://github.com/rust-lang/rust/pull/31020
3832 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
3833 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
3834 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
3835 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
3836 [1.8n]: https://github.com/rust-lang/rust/pull/31056
3837 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
3838 [1.8r]: https://github.com/rust-lang/rust/pull/31551
3839 [1.8so]: https://github.com/rust-lang/rust/pull/31333
3840 [1.8st]: https://github.com/rust-lang/rust/pull/29520
3841 [1.8t]: https://github.com/rust-lang/rust/pull/31358
3842 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
3843 [1.8u]: https://github.com/rust-lang/rust/pull/31793
3844 [1.8v]: https://github.com/rust-lang/rust/pull/31757
3845 [1.8w]: https://github.com/rust-lang/rust/pull/31904
3846 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
3847 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
3848 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
3849 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
3850 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
3851 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
3852 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
3853 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
3854 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
3855 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
3856 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
3857 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
3858 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
3859 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
3860 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
3861 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
3862 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
3863 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
3864 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
3865 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
3866 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
3867 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
3868 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
3869 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
3870 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
3871 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
3872 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
3873 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
3874 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
3875 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
3878 Version 1.7.0 (2016-03-03)
3879 ==========================
3886 * [`Path::strip_prefix`][] (renamed from relative_from)
3887 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
3889 * [`Ipv4Addr::is_loopback`]
3890 * [`Ipv4Addr::is_private`]
3891 * [`Ipv4Addr::is_link_local`]
3892 * [`Ipv4Addr::is_multicast`]
3893 * [`Ipv4Addr::is_broadcast`]
3894 * [`Ipv4Addr::is_documentation`]
3896 * [`Ipv6Addr::is_unspecified`]
3897 * [`Ipv6Addr::is_loopback`]
3898 * [`Ipv6Addr::is_multicast`]
3901 * [`Vec::as_mut_slice`]
3903 * [`String::as_str`]
3904 * [`String::as_mut_str`]
3906 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
3908 * `<[T]>::`[`sort_by_key`]
3909 * checked, saturated, and overflowing operations
3910 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
3911 * [`i32::saturating_mul`]
3912 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
3913 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
3914 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
3915 * [`u32::saturating_mul`]
3916 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
3917 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
3918 * and checked, saturated, and overflowing operations for other primitive types
3920 * [`ffi::IntoStringError`]
3921 * [`CString::into_string`]
3922 * [`CString::into_bytes`]
3923 * [`CString::into_bytes_with_nul`]
3924 * `From<CString> for Vec<u8>`
3926 * [`IntoStringError::into_cstring`]
3927 * [`IntoStringError::utf8_error`]
3928 * `Error for IntoStringError`
3930 * [`std::hash::BuildHasher`]
3931 * [`BuildHasher::Hasher`]
3932 * [`BuildHasher::build_hasher`]
3933 * [`std::hash::BuildHasherDefault`]
3934 * [`HashMap::with_hasher`]
3935 * [`HashMap::with_capacity_and_hasher`]
3936 * [`HashSet::with_hasher`]
3937 * [`HashSet::with_capacity_and_hasher`]
3938 * [`std::collections::hash_map::RandomState`]
3939 * [`RandomState::new`]
3940 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
3941 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
3942 from bytes is faster.
3943 * [The performance of `LineWriter` (and thus `io::stdout`) was
3944 improved by using `memchr` to search for newlines][1.7m].
3945 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
3946 `f64` variants were stabilized previously.
3947 * [`BTreeMap` was rewritten to use less memory and improve the performance
3948 of insertion and iteration, the latter by as much as 5x][1.7bm].
3949 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
3950 covariant over their contained type][1.7bt].
3951 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
3952 over their contained type][1.7ll].
3953 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
3955 * [`Any` is implemented for unsized types][1.7a].
3956 * [`Hash` is implemented for `Duration`][1.7h].
3961 * [When running tests with `--test`, rustdoc will pass `--cfg`
3962 arguments to the compiler][1.7dt].
3963 * [The compiler is built with RPATH information by default][1.7rpa].
3964 This means that it will be possible to run `rustc` when installed in
3965 unusual configurations without configuring the dynamic linker search
3967 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
3968 any RPATH entries (emitted with `-C rpath`) *not* take precedence
3969 over `LD_LIBRARY_PATH`.
3974 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
3975 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
3976 * [The `rerun-if-changed` build script directive no longer causes the
3977 build script to incorrectly run twice in certain scenarios][1.7rr].
3982 * Soundness fixes to the interactions between associated types and
3983 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
3984 code that violates the new rules. This is a significant change that
3985 is known to break existing code, so it has emitted warnings for the
3986 new error cases since 1.4 to give crate authors time to adapt. The
3987 details of what is changing are subtle; read the RFC for more.
3988 * [Several bugs in the compiler's visibility calculations were
3989 fixed][1.7v]. Since this was found to break significant amounts of
3990 code, the new errors will be emitted as warnings for several release
3991 cycles, under the `private_in_public` lint.
3992 * Defaulted type parameters were accidentally accepted in positions
3993 that were not intended. In this release, [defaulted type parameters
3994 appearing outside of type definitions will generate a
3995 warning][1.7d], which will become an error in future releases.
3996 * [Parsing "." as a float results in an error instead of 0][1.7p].
3997 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
3998 * [Borrows of closure parameters may not outlive the closure][1.7bc].
4000 [1.7a]: https://github.com/rust-lang/rust/pull/30928
4001 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
4002 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
4003 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
4004 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
4005 [1.7d]: https://github.com/rust-lang/rust/pull/30724
4006 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
4007 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
4008 [1.7f]: https://github.com/rust-lang/rust/pull/30672
4009 [1.7h]: https://github.com/rust-lang/rust/pull/30818
4010 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
4011 [1.7m]: https://github.com/rust-lang/rust/pull/30381
4012 [1.7p]: https://github.com/rust-lang/rust/pull/30681
4013 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
4014 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
4015 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
4016 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
4017 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
4018 [1.7v]: https://github.com/rust-lang/rust/pull/29973
4019 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4020 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4021 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
4022 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
4023 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
4024 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
4025 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
4026 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
4027 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
4028 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
4029 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
4030 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
4031 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
4032 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
4033 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
4034 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
4035 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
4036 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
4037 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
4038 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
4039 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
4040 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
4041 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
4042 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
4043 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
4044 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
4045 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
4046 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
4047 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
4048 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
4049 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
4050 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
4051 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
4052 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
4053 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
4054 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
4055 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
4056 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
4057 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
4058 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
4059 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
4060 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
4061 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
4062 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
4063 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
4064 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
4065 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
4066 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
4067 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
4068 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
4069 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
4070 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
4071 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
4072 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
4073 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
4074 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
4075 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
4076 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
4077 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
4078 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
4081 Version 1.6.0 (2016-01-21)
4082 ==========================
4087 * The `#![no_std]` attribute causes a crate to not be linked to the
4088 standard library, but only the [core library][1.6co], as described
4089 in [RFC 1184]. The core library defines common types and traits but
4090 has no platform dependencies whatsoever, and is the basis for Rust
4091 software in environments that cannot support a full port of the
4092 standard library, such as operating systems. Most of the core
4093 library is now stable.
4099 [`Read::read_exact`],
4100 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
4101 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
4102 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
4103 [`os::unix::fs::DirBuilderExt`],
4104 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
4105 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
4106 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
4107 [`collections::hash_map::Drain`],
4108 [`collections::hash_map::HashMap::drain`],
4109 [`collections::hash_set::Drain`],
4110 [`collections::hash_set::HashSet::drain`],
4111 [`collections::binary_heap::Drain`],
4112 [`collections::binary_heap::BinaryHeap::drain`],
4113 [`Vec::extend_from_slice`][] (renamed from `push_all`),
4114 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
4115 [`RwLock::into_inner`],
4116 [`Iterator::min_by_key`][] (renamed from `min_by`),
4117 [`Iterator::max_by_key`][] (renamed from `max_by`).
4118 * The [core library][1.6co] is stable, as are most of its APIs.
4119 * [The `assert_eq!` macro supports arguments that don't implement
4120 `Sized`][1.6ae], such as arrays. In this way it behaves more like
4122 * Several timer functions that take duration in milliseconds [are
4123 deprecated in favor of those that take `Duration`][1.6ms]. These
4124 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
4125 `thread::park_timeout_ms`.
4126 * The algorithm by which `Vec` reserves additional elements was
4127 [tweaked to not allocate excessive space][1.6a] while still growing
4129 * `From` conversions are [implemented from integers to floats][1.6f]
4130 in cases where the conversion is lossless. Thus they are not
4131 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
4132 or `f64`. They are also not implemented for `isize` and `usize`
4133 because the implementations would be platform-specific. `From` is
4134 also implemented from `f32` to `f64`.
4135 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
4136 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
4137 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
4138 * [`BinaryHeap` was refactored][1.6bh] for modest performance
4140 * Sorting slices that are already sorted [is 50% faster in some
4146 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
4147 * Cargo build scripts can specify their dependencies by emitting the
4148 [`rerun-if-changed`][1.6rr] key.
4149 * crates.io will reject publication of crates with dependencies that
4150 have a wildcard version constraint. Crates with wildcard
4151 dependencies were seen to cause a variety of problems, as described
4152 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
4154 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
4155 release folder. A variety of artifacts that Cargo failed to clean
4156 are now correctly deleted.
4161 * The `unreachable_code` lint [warns when a function call's argument
4163 * The parser indicates [failures that may be caused by
4164 confusingly-similar Unicode characters][1.6uc]
4165 * Certain macro errors [are reported at definition time][1.6m], not
4171 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
4172 environment variable when locating crates. This was a pre-cargo
4173 feature for integrating with the package manager that was
4174 accidentally never removed.
4175 * [A number of bugs were fixed in the privacy checker][1.6p] that
4176 could cause previously-accepted code to break.
4177 * [Modules and unit/tuple structs may not share the same name][1.6ts].
4178 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
4179 struct pattern syntax (`Foo(..)`) can no longer be used to match
4180 unit structs. This is a warning now, but will become an error in
4181 future releases. Patterns that share the same name as a const are
4183 * A bug was fixed that causes [rustc not to apply default type
4184 parameters][1.6xc] when resolving certain method implementations of
4185 traits defined in other crates.
4187 [1.6a]: https://github.com/rust-lang/rust/pull/29454
4188 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
4189 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
4190 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
4191 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
4192 [1.6co]: http://doc.rust-lang.org/core/index.html
4193 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
4194 [1.6f]: https://github.com/rust-lang/rust/pull/29129
4195 [1.6m]: https://github.com/rust-lang/rust/pull/29828
4196 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
4197 [1.6p]: https://github.com/rust-lang/rust/pull/29726
4198 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
4199 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
4200 [1.6s]: https://github.com/rust-lang/rust/pull/29675
4201 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
4202 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
4203 [1.6us]: https://github.com/rust-lang/rust/pull/29383
4204 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
4205 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
4206 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4207 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
4208 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
4209 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
4210 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
4211 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
4212 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
4213 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
4214 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
4215 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
4216 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
4217 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
4218 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
4219 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
4220 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
4221 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
4222 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
4223 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
4224 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
4225 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
4226 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
4227 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
4228 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
4229 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
4230 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
4231 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
4232 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
4233 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
4236 Version 1.5.0 (2015-12-10)
4237 ==========================
4239 * ~700 changes, numerous bugfixes
4245 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
4246 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
4247 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
4248 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
4249 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
4250 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
4251 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
4252 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
4253 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
4254 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
4255 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
4256 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
4257 [`Path::read_link`], [`Path::symlink_metadata`],
4258 [`Utf8Error::valid_up_to`], [`Vec::resize`],
4259 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
4260 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
4261 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
4262 [`slice::split_first_mut`], [`slice::split_first`],
4263 [`slice::split_last_mut`], [`slice::split_last`],
4264 [`char::from_u32_unchecked`], [`fs::canonicalize`],
4265 [`str::MatchIndices`], [`str::RMatchIndices`],
4266 [`str::match_indices`], [`str::rmatch_indices`],
4267 [`str::slice_mut_unchecked`], [`string::ParseError`].
4268 * Rust applications hosted on crates.io can be installed locally to
4269 `~/.cargo/bin` with the [`cargo install`] command. Among other
4270 things this makes it easier to augment Cargo with new subcommands:
4271 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
4272 invoked as `cargo foo`.
4273 * Crates with wildcard (`*`) dependencies will [emit warnings when
4274 published][1.5w]. In 1.6 it will no longer be possible to publish
4275 crates with wildcard dependencies.
4280 * The rules determining when a particular lifetime must outlive
4281 a particular value (known as '[dropck]') have been [modified
4282 to not rely on parametricity][1.5p].
4283 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
4284 and `Arc`][1.5a]. Because these smart pointer types implement
4285 `Deref`, this causes breakage in cases where the interior type
4286 contains methods of the same name.
4287 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
4288 that they could drop their content. Soundness fix.
4289 * All method invocations are [properly checked][1.5wf1] for
4290 [well-formedness][1.5wf2]. Soundness fix.
4291 * Traits whose supertraits contain `Self` are [not object
4292 safe][1.5o]. Soundness fix.
4293 * Target specifications support a [`no_default_libraries`][1.5nd]
4294 setting that controls whether `-nodefaultlibs` is passed to the
4295 linker, and in turn the `is_like_windows` setting no longer affects
4296 the `-nodefaultlibs` flag.
4297 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
4298 * The `#[inline]` and `#[repr]` attributes [can only appear
4299 in valid locations][1.5at].
4300 * Native libraries linked from the local crate are [passed to
4301 the linker before native libraries from upstream crates][1.5nl].
4302 * Two rarely-used attributes, `#[no_debug]` and
4303 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
4304 * Negation of unsigned integers, which has been a warning for
4305 several releases, [is now behind a feature gate and will
4306 generate errors][1.5nu].
4307 * The parser accidentally accepted visibility modifiers on
4308 enum variants, a bug [which has been fixed][1.5ev].
4309 * [A bug was fixed that allowed `use` statements to import unstable
4315 * When evaluating expressions at compile-time that are not
4316 compile-time constants (const-evaluating expressions in non-const
4317 contexts), incorrect code such as overlong bitshifts and arithmetic
4318 overflow will [generate a warning instead of an error][1.5ce],
4319 delaying the error until runtime. This will allow the
4320 const-evaluator to be expanded in the future backwards-compatibly.
4321 * The `improper_ctypes` lint [no longer warns about using `isize` and
4322 `usize` in FFI][1.5ict].
4327 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
4329 * `Default` is [implemented for mutable slices][1.5d].
4330 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
4331 * There are now `From` conversions [between floating point
4332 types][1.5f] where the conversions are lossless.
4333 * There are now `From` conversions [between integer types][1.5i] where
4334 the conversions are lossless.
4335 * [`fs::Metadata` implements `Clone`][1.5fs].
4336 * The `parse` method [accepts a leading "+" when parsing
4338 * [`AsMut` is implemented for `Vec`][1.5am].
4339 * The `clone_from` implementations for `String` and `BinaryHeap` [have
4340 been optimized][1.5cf] and no longer rely on the default impl.
4341 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
4342 `unsafe extern "C"` function types now [implement `Clone`,
4343 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
4344 `fmt::Debug` for up to 12 arguments][1.5fp].
4345 * [Dropping `Vec`s is much faster in unoptimized builds when the
4346 element types don't implement `Drop`][1.5dv].
4347 * A bug that caused in incorrect behavior when [combining `VecDeque`
4348 with zero-sized types][1.5vdz] was resolved.
4349 * [`PartialOrd` for slices is faster][1.5po].
4354 * [Crate metadata size was reduced by 20%][1.5md].
4355 * [Improvements to code generation reduced the size of libcore by 3.3
4356 MB and rustc's memory usage by 18MB][1.5m].
4357 * [Improvements to deref translation increased performance in
4358 unoptimized builds][1.5dr].
4359 * Various errors in trait resolution [are deduplicated to only be
4360 reported once][1.5te].
4361 * Rust has preliminary [support for rumprun kernels][1.5rr].
4362 * Rust has preliminary [support for NetBSD on amd64][1.5na].
4364 [1.5use]: https://github.com/rust-lang/rust/pull/28364
4365 [1.5po]: https://github.com/rust-lang/rust/pull/28436
4366 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
4367 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
4368 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
4369 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
4370 [1.5md]: https://github.com/rust-lang/rust/pull/28521
4371 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
4372 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
4373 [1.5na]: https://github.com/rust-lang/rust/pull/28543
4374 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
4375 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
4376 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
4377 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
4378 [1.5te]: https://github.com/rust-lang/rust/pull/28645
4379 [1.5at]: https://github.com/rust-lang/rust/pull/28650
4380 [1.5am]: https://github.com/rust-lang/rust/pull/28663
4381 [1.5m]: https://github.com/rust-lang/rust/pull/28778
4382 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
4383 [1.5a]: https://github.com/rust-lang/rust/pull/28811
4384 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
4385 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
4386 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
4387 [1.5i]: https://github.com/rust-lang/rust/pull/28921
4388 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
4389 [1.5f]: https://github.com/rust-lang/rust/pull/29129
4390 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
4391 [1.5s]: https://github.com/rust-lang/rust/pull/29190
4392 [1.5d]: https://github.com/rust-lang/rust/pull/29245
4393 [1.5o]: https://github.com/rust-lang/rust/pull/29259
4394 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
4395 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4396 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
4397 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
4398 [1.5c]: https://github.com/rust-lang/rust/pull/29110
4399 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4400 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
4401 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
4402 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
4403 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
4404 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
4405 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
4406 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
4407 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
4408 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
4409 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
4410 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
4411 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
4412 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
4413 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
4414 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
4415 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
4416 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
4417 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
4418 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
4419 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
4420 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
4421 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
4422 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
4423 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
4424 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
4425 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
4426 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
4427 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
4428 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
4429 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
4430 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
4431 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
4432 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
4433 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
4434 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
4435 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
4436 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
4437 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
4438 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
4439 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
4440 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
4441 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
4442 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
4443 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
4444 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
4445 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
4446 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
4447 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
4448 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
4449 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
4450 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
4451 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
4452 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
4454 Version 1.4.0 (2015-10-29)
4455 ==========================
4457 * ~1200 changes, numerous bugfixes
4462 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
4463 GNU) are now supported and recommended for use.
4468 * [Several changes have been made to fix type soundness and improve
4469 the behavior of associated types][sound]. See [RFC 1214]. Although
4470 we have mostly introduced these changes as warnings this release, to
4471 become errors next release, there are still some scenarios that will
4472 see immediate breakage.
4473 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
4474 line breaks in addition to `\n`][crlf].
4475 * [Loans of `'static` lifetime extend to the end of a function][stat].
4476 * [`str::parse` no longer introduces avoidable rounding error when
4477 parsing floating point numbers. Together with earlier changes to
4478 float formatting/output, "round trips" like f.to_string().parse()
4479 now preserve the value of f exactly. Additionally, leading plus
4480 signs are now accepted][fp3].
4486 * `use` statements that import multiple items [can now rename
4487 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
4488 * [Binops work correctly on fat pointers][binfat].
4489 * `pub extern crate`, which does not behave as expected, [issues a
4490 warning][pec] until a better solution is found.
4495 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
4496 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
4497 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
4498 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
4499 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
4500 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
4501 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
4502 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
4503 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
4504 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
4505 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
4506 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
4507 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
4508 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
4509 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
4510 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
4511 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
4512 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
4514 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
4515 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
4516 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
4517 `f64::from_str_radix`.
4518 * [Reverse-searching strings is faster with the 'two-way'
4520 * [`std::io::copy` allows `?Sized` arguments][cc].
4521 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
4522 [override `count`, `nth` and `last` with an O(1)
4523 implementation][it].
4524 * [`Default` is implemented for arrays up to `[T; 32]`][d].
4525 * [`IntoRawFd` has been added to the Unix-specific prelude,
4526 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
4528 * [`Extend<String>` and `FromIterator<String` are both implemented for
4530 * [`IntoIterator` is implemented for references to `Option` and
4532 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
4533 Copy`][ext] as part of [RFC 839]. This will cause type inference
4534 breakage in rare situations.
4535 * [`BinaryHeap` implements `Debug`][bh2].
4536 * [`Borrow` and `BorrowMut` are implemented for fixed-size
4538 * [`extern fn`s with the "Rust" and "C" ABIs implement common
4539 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
4540 * [String comparison is faster][faststr].
4541 * `&mut T` where `T: std::fmt::Write` [also implements
4542 `std::fmt::Write`][mutw].
4543 * [A stable regression in `VecDeque::push_back` and other
4544 capacity-altering methods that caused panics for zero-sized types
4546 * [Function pointers implement traits for up to 12 parameters][fp2].
4551 * The compiler [no longer uses the 'morestack' feature to prevent
4552 stack overflow][mm]. Instead it uses guard pages and stack
4553 probes (though stack probes are not yet implemented on any platform
4555 * [The compiler matches traits faster when projections are involved][p].
4556 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
4558 * [Cargo now displays useful information about what its doing during
4559 `cargo update`][cu].
4561 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
4562 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
4563 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
4564 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
4565 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
4566 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
4567 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
4568 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
4569 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
4570 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
4571 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
4572 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
4573 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
4574 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
4575 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
4576 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
4577 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
4578 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
4579 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4580 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4581 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4582 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4583 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4584 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4585 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4586 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4587 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
4588 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
4589 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
4590 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
4591 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
4592 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
4593 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
4594 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
4595 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
4596 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
4597 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
4598 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
4599 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
4600 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
4601 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
4602 [bh2]: https://github.com/rust-lang/rust/pull/28156
4603 [binfat]: https://github.com/rust-lang/rust/pull/28270
4604 [bm]: https://github.com/rust-lang/rust/pull/28197
4605 [cc]: https://github.com/rust-lang/rust/pull/27531
4606 [crlf]: https://github.com/rust-lang/rust/pull/28034
4607 [cu]: https://github.com/rust-lang/cargo/pull/1931
4608 [d]: https://github.com/rust-lang/rust/pull/27825
4609 [dep]: https://github.com/rust-lang/rust/pull/28339
4610 [es]: https://github.com/rust-lang/rust/pull/27956
4611 [ext]: https://github.com/rust-lang/rust/pull/28094
4612 [faststr]: https://github.com/rust-lang/rust/pull/28338
4613 [ffi]: https://github.com/rust-lang/rust/pull/28779
4614 [fp]: https://github.com/rust-lang/rust/pull/28268
4615 [fp2]: https://github.com/rust-lang/rust/pull/28560
4616 [fp3]: https://github.com/rust-lang/rust/pull/27307
4617 [i]: https://github.com/rust-lang/rust/pull/27451
4618 [into2]: https://github.com/rust-lang/rust/pull/28039
4619 [it]: https://github.com/rust-lang/rust/pull/27652
4620 [mm]: https://github.com/rust-lang/rust/pull/27338
4621 [mutw]: https://github.com/rust-lang/rust/pull/28368
4622 [sound]: https://github.com/rust-lang/rust/pull/27641
4623 [p]: https://github.com/rust-lang/rust/pull/27866
4624 [pec]: https://github.com/rust-lang/rust/pull/28486
4625 [pr]: https://github.com/rust-lang/rust/pull/27896
4626 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4627 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4628 [s]: https://github.com/rust-lang/rust/pull/27474
4629 [stab]: https://github.com/rust-lang/rust/pull/28339
4630 [stat]: https://github.com/rust-lang/rust/pull/28321
4631 [vd]: https://github.com/rust-lang/rust/pull/28494
4633 Version 1.3.0 (2015-09-17)
4634 ==============================
4636 * ~900 changes, numerous bugfixes
4641 * The [new object lifetime defaults][nold] have been [turned
4642 on][nold2] after a cycle of warnings about the change. Now types
4643 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
4644 being interpreted as `&'a Box<Trait+'a>` to `&'a
4645 Box<Trait+'static>`.
4646 * [The Rustonomicon][nom] is a new book in the official documentation
4647 that dives into writing unsafe Rust.
4648 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
4649 timekeeping is employed by other std APIs, as well as out-of-tree
4655 * The [new object lifetime defaults][nold] have been [turned
4656 on][nold2] after a cycle of warnings about the change.
4657 * There is a known [regression][lr] in how object lifetime elision is
4658 interpreted, the proper solution for which is undetermined.
4659 * The `#[prelude_import]` attribute, an internal implementation
4660 detail, was accidentally stabilized previously. [It has been put
4661 behind the `prelude_import` feature gate][pi]. This change is
4662 believed to break no existing code.
4663 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4664 [more sane for dynamically sized types][dst3]. Code that relied on
4665 the previous behavior is thought to be broken.
4666 * The `dropck` rules, which checks that destructors can't access
4667 destroyed values, [have been updated][dropck] to match the
4668 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
4669 cause some previously-compiling code to no longer build.
4674 * The [new object lifetime defaults][nold] have been [turned
4675 on][nold2] after a cycle of warnings about the change.
4676 * Semicolons may [now follow types and paths in
4677 macros](https://github.com/rust-lang/rust/pull/27000).
4678 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4679 [more sane for dynamically sized types][dst3]. Code that relied on
4680 the previous behavior is not known to exist, and suspected to be
4682 * `'static` variables [may now be recursive][st].
4683 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
4684 implementations correctly.
4685 * The `dropck` rules, which checks that destructors can't access
4686 destroyed values, [have been updated][dropck] to match the
4692 * The [`Duration`] API, [has been stabilized][ds], as well as the
4693 `std::time` module, which presently contains only `Duration`.
4694 * `Box<str>` and `Box<[T]>` both implement `Clone`.
4695 * The owned C string, [`CString`], implements [`Borrow`] and the
4696 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
4697 these allow C strings to be borrowed and cloned in generic code.
4698 * [`CStr`] implements [`Debug`].
4699 * [`AtomicPtr`] implements [`Debug`].
4700 * [`Error`] trait objects [can be downcast to their concrete types][e]
4701 in many common configurations, using the [`is`], [`downcast`],
4702 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
4704 * Searching for substrings now [employs the two-way algorithm][search]
4705 instead of doing a naive search. This gives major speedups to a
4706 number of methods, including [`contains`][sc], [`find`][sf],
4707 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
4708 [`ends_with`][sew] are also faster.
4709 * The performance of `PartialEq` for slices is [much faster][ps].
4710 * The [`Hash`] trait offers the default method, [`hash_slice`], which
4711 is overridden and optimized by the implementations for scalars.
4712 * The [`Hasher`] trait now has a number of specialized `write_*`
4713 methods for primitive types, for efficiency.
4714 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
4715 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
4716 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
4717 of [`std::error::Error::cause`][iec] also delegates to the inner
4719 * [`process::Child`][pc] gained the [`id`] method, which returns a
4720 `u32` representing the platform-specific process identifier.
4721 * The [`connect`] method on slices is deprecated, replaced by the new
4722 [`join`] method (note that both of these are on the *unstable*
4723 [`SliceConcatExt`] trait, but through the magic of the prelude are
4724 available to stable code anyway).
4725 * The [`Div`] operator is implemented for [`Wrapping`] types.
4726 * [`DerefMut` is implemented for `String`][dms].
4727 * Performance of SipHash (the default hasher for `HashMap`) is
4728 [better for long data][sh].
4729 * [`AtomicPtr`] implements [`Send`].
4730 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
4731 are now [specialized to use uninitialized buffers for increased
4733 * Lifetime parameters of foreign functions [are now resolved
4739 * Rust can now, with some coercion, [produce programs that run on
4740 Windows XP][xp], though XP is not considered a supported platform.
4741 * Porting Rust on Windows from the GNU toolchain to MSVC continues
4742 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
4743 recommended for use in 1.3, though should be fully-functional
4744 in the [64-bit 1.4 beta][b14].
4745 * On Fedora-based systems installation will [properly configure the
4746 dynamic linker][fl].
4747 * The compiler gained many new extended error descriptions, which can
4748 be accessed with the `--explain` flag.
4749 * The `dropck` pass, which checks that destructors can't access
4750 destroyed values, [has been rewritten][dropck]. This fixes some
4751 soundness holes, and as such will cause some previously-compiling
4752 code to no longer build.
4753 * `rustc` now uses [LLVM to write archive files where possible][ar].
4754 Eventually this will eliminate the compiler's dependency on the ar
4756 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
4757 supported FreeBSD on x86_64).
4758 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
4759 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
4761 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
4762 will kill the process instead of leaking][nlp].
4764 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
4765 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
4766 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
4767 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
4768 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
4769 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4770 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4771 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
4772 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
4773 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
4774 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
4775 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
4776 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
4777 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4778 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
4779 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
4780 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
4781 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
4782 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4783 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
4784 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
4785 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
4786 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
4787 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4788 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
4789 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
4790 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
4791 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
4792 [ar]: https://github.com/rust-lang/rust/pull/26926
4793 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
4794 [dms]: https://github.com/rust-lang/rust/pull/26241
4795 [dropck]: https://github.com/rust-lang/rust/pull/27261
4796 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4797 [ds]: https://github.com/rust-lang/rust/pull/26818
4798 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
4799 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
4800 [dst3]: https://github.com/rust-lang/rust/pull/27351
4801 [e]: https://github.com/rust-lang/rust/pull/24793
4802 [f]: https://github.com/rust-lang/rust/pull/26588
4803 [fb]: https://github.com/rust-lang/rust/pull/26959
4804 [fl]: https://github.com/rust-lang/rust-installer/pull/41
4805 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4806 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
4807 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
4808 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
4809 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
4810 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
4811 [lic]: https://github.com/rust-lang/rust/pull/26583
4812 [lnu]: https://github.com/rust-lang/rust/pull/27026
4813 [lr]: https://github.com/rust-lang/rust/issues/27248
4814 [lum]: https://github.com/rust-lang/rust/pull/26378
4815 [lur]: https://github.com/rust-lang/rust/pull/26783
4816 [nlp]: https://github.com/rust-lang/rust/pull/27176
4817 [nold2]: https://github.com/rust-lang/rust/pull/27045
4818 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
4819 [nom]: http://doc.rust-lang.org/nightly/nomicon/
4820 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
4821 [pi]: https://github.com/rust-lang/rust/pull/26699
4822 [ps]: https://github.com/rust-lang/rust/pull/26884
4823 [rte]: https://github.com/rust-lang/rust/pull/26950
4824 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
4825 [search]: https://github.com/rust-lang/rust/pull/26327
4826 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
4827 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
4828 [sh]: https://github.com/rust-lang/rust/pull/27280
4829 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
4830 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
4831 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
4832 [st]: https://github.com/rust-lang/rust/pull/26630
4833 [win1]: https://github.com/rust-lang/rust/pull/26569
4834 [win2]: https://github.com/rust-lang/rust/pull/26741
4835 [win3]: https://github.com/rust-lang/rust/pull/26741
4836 [win4]: https://github.com/rust-lang/rust/pull/27210
4837 [xp]: https://github.com/rust-lang/rust/pull/26569
4839 Version 1.2.0 (2015-08-07)
4840 ==========================
4842 * ~1200 changes, numerous bugfixes
4847 * [Dynamically-sized-type coercions][dst] allow smart pointer types
4848 like `Rc` to contain types without a fixed size, arrays and trait
4849 objects, finally enabling use of `Rc<[T]>` and completing the
4850 implementation of DST.
4851 * [Parallel codegen][parcodegen] is now working again, which can
4852 substantially speed up large builds in debug mode; It also gets
4853 another ~33% speedup when bootstrapping on a 4 core machine (using 8
4854 jobs). It's not enabled by default, but will be "in the near
4855 future". It can be activated with the `-C codegen-units=N` flag to
4857 * This is the first release with [experimental support for linking
4858 with the MSVC linker and lib C on Windows (instead of using the GNU
4859 variants via MinGW)][win]. It is yet recommended only for the most
4860 intrepid Rustaceans.
4861 * Benchmark compilations are showing a 30% improvement in
4862 bootstrapping over 1.1.
4867 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
4868 unicode case mapping, which is a previously-planned change in
4869 behavior and considered a bugfix.
4870 * [`mem::align_of`] now specifies [the *minimum alignment* for
4871 T][align], which is usually the alignment programs are interested
4872 in, and the same value reported by clang's
4873 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
4875 * [The `#[packed]` attribute is no longer silently accepted by the
4876 compiler][packed]. This attribute did nothing and code that
4877 mentioned it likely did not work as intended.
4878 * Associated type defaults are [now behind the
4879 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
4880 defaults *did not work*, but could be mentioned syntactically. As
4881 such this breakage has minimal impact.
4886 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
4887 matching against dereferenceable values.
4892 * The [`Extend`] trait, which grows a collection from an iterator, is
4893 implemented over iterators of references, for `String`, `Vec`,
4894 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
4895 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
4896 * The [`iter::once`] function returns an iterator that yields a single
4897 element, and [`iter::empty`] returns an iterator that yields no
4899 * The [`matches`] and [`rmatches`] methods on `str` return iterators
4900 over substring matches.
4901 * [`Cell`] and [`RefCell`] both implement `Eq`.
4902 * A number of methods for wrapping arithmetic are added to the
4903 integral types, [`wrapping_div`], [`wrapping_rem`],
4904 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
4905 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
4906 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
4907 type.. It is illegal for the default arithmetic operations in Rust
4908 to overflow; the desire to wrap must be explicit.
4909 * The `{:#?}` formatting specifier [displays the alternate,
4910 pretty-printed][debugfmt] form of the `Debug` formatter. This
4911 feature was actually introduced prior to 1.0 with little
4913 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
4914 for writing data to formatted strings, similar to [`io::Write`].
4915 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
4916 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
4917 are used by code generators to emit implementations of [`Debug`].
4918 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
4919 methods that convert case, following Unicode case mapping.
4920 * It is now easier to handle poisoned locks. The [`PoisonError`]
4921 type, returned by failing lock operations, exposes `into_inner`,
4922 `get_ref`, and `get_mut`, which all give access to the inner lock
4923 guard, and allow the poisoned lock to continue to operate. The
4924 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
4925 poisoned lock without attempting to take the lock.
4926 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
4927 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
4928 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
4929 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
4931 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
4937 * `rustc` employs smarter heuristics for guessing at [typos].
4938 * `rustc` emits more efficient code for [no-op conversions between
4939 unsafe pointers][nop].
4940 * Fat pointers are now [passed in pairs of immediate arguments][fat],
4941 resulting in faster compile times and smaller code.
4943 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
4944 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4945 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
4946 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
4947 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
4948 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
4949 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
4950 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
4951 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
4952 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
4953 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
4954 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
4955 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
4956 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
4957 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
4958 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
4959 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4960 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
4961 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
4962 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
4963 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
4964 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
4965 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
4966 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
4967 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
4968 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4969 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
4970 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
4971 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
4972 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
4973 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
4974 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
4975 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
4976 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4977 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4978 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
4979 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
4980 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
4981 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
4982 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
4983 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
4984 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4985 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
4986 [align]: https://github.com/rust-lang/rust/pull/25646
4987 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
4988 [typos]: https://github.com/rust-lang/rust/pull/26087
4989 [nop]: https://github.com/rust-lang/rust/pull/26336
4990 [fat]: https://github.com/rust-lang/rust/pull/26411
4991 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
4992 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
4993 [packed]: https://github.com/rust-lang/rust/pull/25541
4994 [ad]: https://github.com/rust-lang/rust/pull/27382
4995 [win]: https://github.com/rust-lang/rust/pull/25350
4997 Version 1.1.0 (2015-06-25)
4998 =========================
5000 * ~850 changes, numerous bugfixes
5005 * The [`std::fs` module has been expanded][fs] to expand the set of
5006 functionality exposed:
5007 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
5008 don't incur a syscall on some platforms.
5009 * A `symlink_metadata` function has been added.
5010 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
5011 access to all underlying information.
5012 * The compiler now contains extended explanations of many errors. When an error
5013 with an explanation occurs the compiler suggests using the `--explain` flag
5014 to read the explanation. Error explanations are also [available online][err-index].
5015 * Thanks to multiple [improvements][sk] to [type checking][pre], as
5016 well as other work, the time to bootstrap the compiler decreased by
5022 * The [`str::split_whitespace`] method splits a string on unicode
5023 whitespace boundaries.
5024 * On both Windows and Unix, new extension traits provide conversion of
5025 I/O types to and from the underlying system handles. On Unix, these
5026 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
5027 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
5028 `TcpListener`, and `UpdSocket`. Further implementations for
5029 `std::process` will be stabilized later.
5030 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
5031 Windows, symlinks can be created with
5032 `std::os::windows::symlink_dir` and
5033 `std::os::windows::symlink_file`.
5034 * The `mpsc::Receiver` type can now be converted into an iterator with
5035 `into_iter` on the [`IntoIterator`] trait.
5036 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
5037 implementation of the [`From`] trait.
5038 * The `Debug` implementation for `RangeFull` [creates output that is
5039 more consistent with other implementations][rf].
5040 * [`Debug` is implemented for `File`][file].
5041 * The `Default` implementation for `Arc` [no longer requires `Sync +
5043 * [The `Iterator` methods `count`, `nth`, and `last` have been
5044 overridden for slices to have O(1) performance instead of O(n)][si].
5045 * Incorrect handling of paths on Windows has been improved in both the
5046 compiler and the standard library.
5047 * [`AtomicPtr` gained a `Default` implementation][ap].
5048 * In accordance with Rust's policy on arithmetic overflow `abs` now
5049 [panics on overflow when debug assertions are enabled][abs].
5050 * The [`Cloned`] iterator, which was accidentally left unstable for
5051 1.0 [has been stabilized][c].
5052 * The [`Incoming`] iterator, which iterates over incoming TCP
5053 connections, and which was accidentally unnamable in 1.0, [is now
5054 properly exported][inc].
5055 * [`BinaryHeap`] no longer corrupts itself [when functions called by
5056 `sift_up` or `sift_down` panic][bh].
5057 * The [`split_off`] method of `LinkedList` [no longer corrupts
5058 the list in certain scenarios][ll].
5063 * Type checking performance [has improved notably][sk] with
5064 [multiple improvements][pre].
5065 * The compiler [suggests code changes][ch] for more errors.
5066 * rustc and it's build system have experimental support for [building
5067 toolchains against MUSL][m] instead of glibc on Linux.
5068 * The compiler defines the `target_env` cfg value, which is used for
5069 distinguishing toolchains that are otherwise for the same
5070 platform. Presently this is set to `gnu` for common GNU Linux
5071 targets and for MinGW targets, and `musl` for MUSL Linux targets.
5072 * The [`cargo rustc`][crc] command invokes a build with custom flags
5074 * [Android executables are always position independent][pie].
5075 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
5078 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
5079 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
5080 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
5081 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
5082 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
5083 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
5084 [rf]: https://github.com/rust-lang/rust/pull/24491
5085 [err-index]: https://doc.rust-lang.org/error-index.html
5086 [sk]: https://github.com/rust-lang/rust/pull/24615
5087 [pre]: https://github.com/rust-lang/rust/pull/25323
5088 [file]: https://github.com/rust-lang/rust/pull/24598
5089 [ch]: https://github.com/rust-lang/rust/pull/24683
5090 [arc]: https://github.com/rust-lang/rust/pull/24695
5091 [si]: https://github.com/rust-lang/rust/pull/24701
5092 [ap]: https://github.com/rust-lang/rust/pull/24834
5093 [m]: https://github.com/rust-lang/rust/pull/24777
5094 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
5095 [crc]: https://github.com/rust-lang/cargo/pull/1568
5096 [pie]: https://github.com/rust-lang/rust/pull/24953
5097 [abs]: https://github.com/rust-lang/rust/pull/25441
5098 [c]: https://github.com/rust-lang/rust/pull/25496
5099 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
5100 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
5101 [inc]: https://github.com/rust-lang/rust/pull/25522
5102 [bh]: https://github.com/rust-lang/rust/pull/25856
5103 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
5104 [ll]: https://github.com/rust-lang/rust/pull/26022
5105 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
5106 [drop]: https://github.com/rust-lang/rust/pull/24935
5108 Version 1.0.0 (2015-05-15)
5109 ========================
5111 * ~1500 changes, numerous bugfixes
5116 * The vast majority of the standard library is now `#[stable]`. It is
5117 no longer possible to use unstable features with a stable build of
5119 * Many popular crates on [crates.io] now work on the stable release
5121 * Arithmetic on basic integer types now [checks for overflow in debug
5127 * Several [restrictions have been added to trait coherence][coh] in
5128 order to make it easier for upstream authors to change traits
5129 without breaking downstream code.
5130 * Digits of binary and octal literals are [lexed more eagerly][lex] to
5131 improve error messages and macro behavior. For example, `0b1234` is
5132 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
5133 * Trait bounds [are always invariant][inv], eliminating the need for
5134 the `PhantomFn` and `MarkerTrait` lang items, which have been
5136 * ["-" is no longer a valid character in crate names][cr], the `extern crate
5137 "foo" as bar` syntax has been replaced with `extern crate foo as
5138 bar`, and Cargo now automatically translates "-" in *package* names
5139 to underscore for the crate name.
5140 * [Lifetime shadowing is an error][lt].
5141 * [`Send` no longer implies `'static`][send-rfc].
5142 * [UFCS now supports trait-less associated paths][moar-ufcs] like
5143 `MyType::default()`.
5144 * Primitive types [now have inherent methods][prim-inherent],
5145 obviating the need for extension traits like `SliceExt`.
5146 * Methods with `Self: Sized` in their `where` clause are [considered
5147 object-safe][self-sized], allowing many extension traits like
5148 `IteratorExt` to be merged into the traits they extended.
5149 * You can now [refer to associated types][assoc-where] whose
5150 corresponding trait bounds appear only in a `where` clause.
5151 * The final bits of [OIBIT landed][oibit-final], meaning that traits
5152 like `Send` and `Sync` are now library-defined.
5153 * A [Reflect trait][reflect] was introduced, which means that
5154 downcasting via the `Any` trait is effectively limited to concrete
5155 types. This helps retain the potentially-important "parametricity"
5156 property: generic code cannot behave differently for different type
5157 arguments except in minor ways.
5158 * The `unsafe_destructor` feature is now deprecated in favor of the
5159 [new `dropck`][dropck]. This change is a major reduction in unsafe
5165 * The `thread_local` module [has been renamed to `std::thread`][th].
5166 * The methods of `IteratorExt` [have been moved to the `Iterator`
5168 * Several traits that implement Rust's conventions for type
5169 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
5170 [centralized in the `std::convert` module][con].
5171 * The `FromError` trait [was removed in favor of `From`][fe].
5172 * The basic sleep function [has moved to
5173 `std::thread::sleep_ms`][slp].
5174 * The `splitn` function now takes an `n` parameter that represents the
5175 number of items yielded by the returned iterator [instead of the
5176 number of 'splits'][spl].
5177 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
5178 * [Derived implementations of `PartialOrd` now order enums according
5179 to their explicitly-assigned discriminants][po].
5180 * [Methods for searching strings are generic over `Pattern`s][pat],
5181 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
5183 * [In method resolution, object methods are resolved before inherent
5185 * [`String::from_str` has been deprecated in favor of the `From` impl,
5186 `String::from`][sf].
5187 * [`io::Error` implements `Sync`][ios].
5188 * [The `words` method on `&str` has been replaced with
5189 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
5191 * The new path and IO modules are complete and `#[stable]`. This
5192 was the major library focus for this cycle.
5193 * The path API was [revised][path-normalize] to normalize `.`,
5194 adjusting the tradeoffs in favor of the most common usage.
5195 * A large number of remaining APIs in `std` were also stabilized
5196 during this cycle; about 75% of the non-deprecated API surface
5198 * The new [string pattern API][string-pattern] landed, which makes
5199 the string slice API much more internally consistent and flexible.
5200 * A new set of [generic conversion traits][conversion] replaced
5201 many existing ad hoc traits.
5202 * Generic numeric traits were [completely removed][num-traits]. This
5203 was made possible thanks to inherent methods for primitive types,
5204 and the removal gives maximal flexibility for designing a numeric
5205 hierarchy in the future.
5206 * The `Fn` traits are now related via [inheritance][fn-inherit]
5207 and provide ergonomic [blanket implementations][fn-blanket].
5208 * The `Index` and `IndexMut` traits were changed to
5209 [take the index by value][index-value], enabling code like
5210 `hash_map["string"]` to work.
5211 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
5212 `Copy` data is known to be `Clone` as well.
5217 * Many errors now have extended explanations that can be accessed with
5218 the `--explain` flag to `rustc`.
5219 * Many new examples have been added to the standard library
5221 * rustdoc has received a number of improvements focused on completion
5223 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
5224 * Much headway was made on ecosystem-wide CI, making it possible
5225 to [compare builds for breakage][ci-compare].
5228 [crates.io]: http://crates.io
5229 [clo]: https://github.com/rust-lang/rust/pull/24034
5230 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
5231 [con]: https://github.com/rust-lang/rust/pull/23875
5232 [cr]: https://github.com/rust-lang/rust/pull/23419
5233 [fe]: https://github.com/rust-lang/rust/pull/23879
5234 [ie]: https://github.com/rust-lang/rust/pull/23300
5235 [inv]: https://github.com/rust-lang/rust/pull/23938
5236 [ios]: https://github.com/rust-lang/rust/pull/24133
5237 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
5238 [lt]: https://github.com/rust-lang/rust/pull/24057
5239 [meth]: https://github.com/rust-lang/rust/pull/24056
5240 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
5241 [po]: https://github.com/rust-lang/rust/pull/24270
5242 [sf]: https://github.com/rust-lang/rust/pull/24517
5243 [slp]: https://github.com/rust-lang/rust/pull/23949
5244 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
5245 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
5246 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
5247 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
5248 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
5249 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
5250 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
5251 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
5252 [self-sized]: https://github.com/rust-lang/rust/pull/22301
5253 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
5254 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
5255 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
5256 [reflect]: https://github.com/rust-lang/rust/pull/23712
5257 [conversion]: https://github.com/rust-lang/rfcs/pull/529
5258 [num-traits]: https://github.com/rust-lang/rust/pull/23549
5259 [index-value]: https://github.com/rust-lang/rust/pull/23601
5260 [dropck]: https://github.com/rust-lang/rfcs/pull/769
5261 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
5262 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
5263 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
5264 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
5265 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
5268 Version 1.0.0-alpha.2 (2015-02-20)
5269 =====================================
5271 * ~1300 changes, numerous bugfixes
5275 * The various I/O modules were [overhauled][io-rfc] to reduce
5276 unnecessary abstractions and provide better interoperation with
5277 the underlying platform. The old `io` module remains temporarily
5279 * The standard library now [participates in feature gating][feat],
5280 so use of unstable libraries now requires a `#![feature(...)]`
5281 attribute. The impact of this change is [described on the
5282 forum][feat-forum]. [RFC][feat-rfc].
5286 * `for` loops [now operate on the `IntoIterator` trait][into],
5287 which eliminates the need to call `.iter()`, etc. to iterate
5288 over collections. There are some new subtleties to remember
5289 though regarding what sort of iterators various types yield, in
5290 particular that `for foo in bar { }` yields values from a move
5291 iterator, destroying the original collection. [RFC][into-rfc].
5292 * Objects now have [default lifetime bounds][obj], so you don't
5293 have to write `Box<Trait+'static>` when you don't care about
5294 storing references. [RFC][obj-rfc].
5295 * In types that implement `Drop`, [lifetimes must outlive the
5296 value][drop]. This will soon make it possible to safely
5297 implement `Drop` for types where `#[unsafe_destructor]` is now
5298 required. Read the [gorgeous RFC][drop-rfc] for details.
5299 * The fully qualified <T as Trait>::X syntax lets you set the Self
5300 type for a trait method or associated type. [RFC][ufcs-rfc].
5301 * References to types that implement `Deref<U>` now [automatically
5302 coerce to references][deref] to the dereferenced type `U`,
5303 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
5304 should eliminate many unsightly uses of `&*`, as when converting
5305 from references to vectors into references to
5306 slices. [RFC][deref-rfc].
5307 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
5308 `|:|`) is obsolete and closure kind is inferred from context.
5309 * [`Self` is a keyword][Self].
5313 * The `Show` and `String` formatting traits [have been
5314 renamed][fmt] to `Debug` and `Display` to more clearly reflect
5315 their related purposes. Automatically getting a string
5316 conversion to use with `format!("{:?}", something_to_debug)` is
5317 now written `#[derive(Debug)]`.
5318 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
5319 OsStr}`, provide strings in platform-specific encodings for easier
5320 interop with system APIs. [RFC][osstr-rfc].
5321 * The `boxed::into_raw` and `Box::from_raw` functions [convert
5322 between `Box<T>` and `*mut T`][boxraw], a common pattern for
5323 creating raw pointers.
5327 * Certain long error messages of the form 'expected foo found bar'
5328 are now [split neatly across multiple
5329 lines][multiline]. Examples in the PR.
5330 * On Unix Rust can be [uninstalled][un] by running
5331 `/usr/local/lib/rustlib/uninstall.sh`.
5332 * The `#[rustc_on_unimplemented]` attribute, requiring the
5333 'on_unimplemented' feature, lets rustc [display custom error
5334 messages when a trait is expected to be implemented for a type
5339 * Rust is tested against a [LALR grammar][lalr], which parses
5340 almost all the Rust files that rustc does.
5342 [boxraw]: https://github.com/rust-lang/rust/pull/21318
5343 [close]: https://github.com/rust-lang/rust/pull/21843
5344 [deref]: https://github.com/rust-lang/rust/pull/21351
5345 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
5346 [drop]: https://github.com/rust-lang/rust/pull/21972
5347 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
5348 [feat]: https://github.com/rust-lang/rust/pull/21248
5349 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
5350 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
5351 [fmt]: https://github.com/rust-lang/rust/pull/21457
5352 [into]: https://github.com/rust-lang/rust/pull/20790
5353 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
5354 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5355 [lalr]: https://github.com/rust-lang/rust/pull/21452
5356 [multiline]: https://github.com/rust-lang/rust/pull/19870
5357 [obj]: https://github.com/rust-lang/rust/pull/22230
5358 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
5359 [onun]: https://github.com/rust-lang/rust/pull/20889
5360 [osstr]: https://github.com/rust-lang/rust/pull/21488
5361 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5362 [Self]: https://github.com/rust-lang/rust/pull/22158
5363 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
5364 [un]: https://github.com/rust-lang/rust/pull/22256
5367 Version 1.0.0-alpha (2015-01-09)
5368 ==================================
5370 * ~2400 changes, numerous bugfixes
5374 * The language itself is considered feature complete for 1.0,
5375 though there will be many usability improvements and bugfixes
5376 before the final release.
5377 * Nearly 50% of the public API surface of the standard library has
5378 been declared 'stable'. Those interfaces are unlikely to change
5380 * The long-running debate over integer types has been
5381 [settled][ints]: Rust will ship with types named `isize` and
5382 `usize`, rather than `int` and `uint`, for pointer-sized
5383 integers. Guidelines will be rolled out during the alpha cycle.
5384 * Most crates that are not `std` have been moved out of the Rust
5385 distribution into the Cargo ecosystem so they can evolve
5386 separately and don't need to be stabilized as quickly, including
5387 'time', 'getopts', 'num', 'regex', and 'term'.
5388 * Documentation continues to be expanded with more API coverage, more
5389 examples, and more in-depth explanations. The guides have been
5390 consolidated into [The Rust Programming Language][trpl].
5391 * "[Rust By Example][rbe]" is now maintained by the Rust team.
5392 * All official Rust binary installers now come with [Cargo], the
5393 Rust package manager.
5397 * Closures have been [completely redesigned][unboxed] to be
5398 implemented in terms of traits, can now be used as generic type
5399 bounds and thus monomorphized and inlined, or via an opaque
5400 pointer (boxed) as in the old system. The new system is often
5401 referred to as 'unboxed' closures.
5402 * Traits now support [associated types][assoc], allowing families
5403 of related types to be defined together and used generically in
5405 * Enum variants are [namespaced by their type names][enum].
5406 * [`where` clauses][where] provide a more versatile and attractive
5407 syntax for specifying generic bounds, though the previous syntax
5409 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
5411 * Rust [no longer has a runtime][rt] of any description, and only
5412 supports OS threads, not green threads.
5413 * At long last, Rust has been overhauled for 'dynamically-sized
5414 types' ([DST]), which integrates 'fat pointers' (object types,
5415 arrays, and `str`) more deeply into the type system, making it
5417 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
5418 `..j` that produce range types and which, when combined with the
5419 `Index` operator and multidispatch, leads to a convenient slice
5421 * The new range syntax revealed an ambiguity in the fixed-length
5422 array syntax, so now fixed length arrays [are written `[T;
5424 * The `Copy` trait is no longer implemented automatically. Unsafe
5425 pointers no longer implement `Sync` and `Send` so types
5426 containing them don't automatically either. `Sync` and `Send`
5427 are now 'unsafe traits' so one can "forcibly" implement them via
5428 `unsafe impl` if a type confirms to the requirements for them
5429 even though the internals do not (e.g. structs containing unsafe
5430 pointers like `Arc`). These changes are intended to prevent some
5431 footguns and are collectively known as [opt-in built-in
5432 traits][oibit] (though `Sync` and `Send` will soon become pure
5433 library types unknown to the compiler).
5434 * Operator traits now take their operands [by value][ops], and
5435 comparison traits can use multidispatch to compare one type
5436 against multiple other types, allowing e.g. `String` to be
5437 compared with `&str`.
5438 * `if let` and `while let` are no longer feature-gated.
5439 * Rust has adopted a more [uniform syntax for escaping unicode
5440 characters][unicode].
5441 * `macro_rules!` [has been declared stable][mac]. Though it is a
5442 flawed system it is sufficiently popular that it must be usable
5443 for 1.0. Effort has gone into [future-proofing][mac-future] it
5444 in ways that will allow other macro systems to be developed in
5445 parallel, and won't otherwise impact the evolution of the
5447 * The prelude has been [pared back significantly][prelude] such
5448 that it is the minimum necessary to support the most pervasive
5449 code patterns, and through [generalized where clauses][where]
5450 many of the prelude extension traits have been consolidated.
5451 * Rust's rudimentary reflection [has been removed][refl], as it
5452 incurred too much code generation for little benefit.
5453 * [Struct variants][structvars] are no longer feature-gated.
5454 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
5455 known as 'higher-ranked trait bounds', this crucially allows
5456 unboxed closures to work.
5457 * Macros invocations surrounded by parens or square brackets and
5458 not terminated by a semicolon are [parsed as
5459 expressions][macros], which makes expressions like `vec![1i32,
5460 2, 3].len()` work as expected.
5461 * Trait objects now implement their traits automatically, and
5462 traits that can be coerced to objects now must be [object
5464 * Automatically deriving traits is now done with `#[derive(...)]`
5465 not `#[deriving(...)]` for [consistency with other naming
5466 conventions][derive].
5467 * Importing the containing module or enum at the same time as
5468 items or variants they contain is [now done with `self` instead
5469 of `mod`][self], as in use `foo::{self, bar}`
5470 * Glob imports are no longer feature-gated.
5471 * The `box` operator and `box` patterns have been feature-gated
5472 pending a redesign. For now unique boxes should be allocated
5473 like other containers, with `Box::new`.
5477 * A [series][coll1] of [efforts][coll2] to establish
5478 [conventions][coll3] for collections types has resulted in API
5479 improvements throughout the standard library.
5480 * New [APIs for error handling][err] provide ergonomic interop
5481 between error types, and [new conventions][err-conv] describe
5482 more clearly the recommended error handling strategies in Rust.
5483 * The `fail!` macro has been renamed to [`panic!`][panic] so that
5484 it is easier to discuss failure in the context of error handling
5485 without making clarifications as to whether you are referring to
5486 the 'fail' macro or failure more generally.
5487 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
5488 syscall when available.
5489 * The 'serialize' crate has been renamed 'rustc-serialize' and
5490 moved out of the distribution to Cargo. Although it is widely
5491 used now, it is expected to be superseded in the near future.
5492 * The `Show` formatter, typically implemented with
5493 `#[derive(Show)]` is [now requested with the `{:?}`
5494 specifier][show] and is intended for use by all types, for uses
5495 such as `println!` debugging. The new `String` formatter must be
5496 implemented by hand, uses the `{}` specifier, and is intended
5497 for full-fidelity conversions of things that can logically be
5498 represented as strings.
5502 * [Flexible target specification][flex] allows rustc's code
5503 generation to be configured to support otherwise-unsupported
5505 * Rust comes with rust-gdb and rust-lldb scripts that launch their
5506 respective debuggers with Rust-appropriate pretty-printing.
5507 * The Windows installation of Rust is distributed with the
5508 MinGW components currently required to link binaries on that
5513 * Nullable enum optimizations have been extended to more types so
5514 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
5515 space than the inner types themselves.
5516 * Work has begun on supporting AArch64.
5518 [Cargo]: https://crates.io
5519 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
5520 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
5521 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
5522 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
5523 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
5524 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
5525 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
5526 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
5527 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
5528 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
5529 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
5530 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
5531 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
5532 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
5533 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
5534 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
5535 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
5536 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
5537 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
5538 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
5539 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
5540 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
5541 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
5542 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
5543 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
5544 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
5545 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
5546 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
5547 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
5548 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
5549 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
5550 [trpl]: https://doc.rust-lang.org/book/index.html
5551 [rbe]: http://rustbyexample.com/
5554 Version 0.12.0 (2014-10-09)
5555 =============================
5557 * ~1900 changes, numerous bugfixes
5561 * The introductory documentation (now called The Rust Guide) has
5562 been completely rewritten, as have a number of supplementary
5564 * Rust's package manager, Cargo, continues to improve and is
5565 sometimes considered to be quite awesome.
5566 * Many API's in `std` have been reviewed and updated for
5567 consistency with the in-development Rust coding
5568 guidelines. The standard library documentation tracks
5569 stabilization progress.
5570 * Minor libraries have been moved out-of-tree to the rust-lang org
5571 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
5572 be installed with Cargo.
5573 * Lifetime elision allows lifetime annotations to be left off of
5574 function declarations in many common scenarios.
5575 * Rust now works on 64-bit Windows.
5578 * Indexing can be overloaded with the `Index` and `IndexMut`
5580 * The `if let` construct takes a branch only if the `let` pattern
5581 matches, currently behind the 'if_let' feature gate.
5582 * 'where clauses', a more flexible syntax for specifying trait
5583 bounds that is more aesthetic, have been added for traits and
5584 free functions. Where clauses will in the future make it
5585 possible to constrain associated types, which would be
5586 impossible with the existing syntax.
5587 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
5588 the 'slicing_syntax' feature gate, and can be overloaded with
5589 the `Slice` or `SliceMut` traits.
5590 * The syntax for matching of sub-slices has been changed to use a
5591 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
5592 consistency with other uses of `..` and to future-proof
5593 potential additional uses of the syntax.
5594 * The syntax for matching inclusive ranges in patterns has changed
5595 from `0..3` to `0...4` to be consistent with the exclusive range
5597 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
5598 c]`) has been put behind the 'advanced_slice_patterns' feature
5599 gate and may be removed in the future.
5600 * Components of tuples and tuple structs can be extracted using
5601 the `value.0` syntax, currently behind the `tuple_indexing`
5603 * The `#[crate_id]` attribute is no longer supported; versioning
5604 is handled by the package manager.
5605 * Renaming crate imports are now written `extern crate foo as bar`
5606 instead of `extern crate bar = foo`.
5607 * Renaming use statements are now written `use foo as bar` instead
5609 * `let` and `match` bindings and argument names in macros are now
5611 * The new, more efficient, closure types ('unboxed closures') have
5612 been added under a feature gate, 'unboxed_closures'. These will
5613 soon replace the existing closure types, once higher-ranked
5614 trait lifetimes are added to the language.
5615 * `move` has been added as a keyword, for indicating closures
5616 that capture by value.
5617 * Mutation and assignment is no longer allowed in pattern guards.
5618 * Generic structs and enums can now have trait bounds.
5619 * The `Share` trait is now called `Sync` to free up the term
5620 'shared' to refer to 'shared reference' (the default reference
5622 * Dynamically-sized types have been mostly implemented,
5623 unifying the behavior of fat-pointer types with the rest of the
5625 * As part of dynamically-sized types, the `Sized` trait has been
5626 introduced, which qualifying types implement by default, and
5627 which type parameters expect by default. To specify that a type
5628 parameter does not need to be sized, write `<Sized? T>`. Most
5629 types are `Sized`, notable exceptions being unsized arrays
5630 (`[T]`) and trait types.
5631 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
5632 * Lifetime bounds can now be applied to type parameters and object
5634 * The old, reference counted GC type, `Gc<T>` which was once
5635 denoted by the `@` sigil, has finally been removed. GC will be
5636 revisited in the future.
5639 * Library documentation has been improved for a number of modules.
5640 * Bit-vectors, collections::bitv has been modernized.
5641 * The url crate is deprecated in favor of
5642 http://github.com/servo/rust-url, which can be installed with
5644 * Most I/O stream types can be cloned and subsequently closed from
5646 * A `std::time::Duration` type has been added for use in I/O
5647 methods that rely on timers, as well as in the 'time' crate's
5648 `Timespec` arithmetic.
5649 * The runtime I/O abstraction layer that enabled the green thread
5650 scheduler to do non-thread-blocking I/O has been removed, along
5651 with the libuv-based implementation employed by the green thread
5652 scheduler. This will greatly simplify the future I/O work.
5653 * `collections::btree` has been rewritten to have a more
5654 idiomatic and efficient design.
5657 * rustdoc output now indicates the stability levels of API's.
5658 * The `--crate-name` flag can specify the name of the crate
5659 being compiled, like `#[crate_name]`.
5660 * The `-C metadata` specifies additional metadata to hash into
5661 symbol names, and `-C extra-filename` specifies additional
5662 information to put into the output filename, for use by the
5663 package manager for versioning.
5664 * debug info generation has continued to improve and should be
5665 more reliable under both gdb and lldb.
5666 * rustc has experimental support for compiling in parallel
5667 using the `-C codegen-units` flag.
5668 * rustc no longer encodes rpath information into binaries by
5672 * Stack usage has been optimized with LLVM lifetime annotations.
5673 * Official Rust binaries on Linux are more compatible with older
5674 kernels and distributions, built on CentOS 5.10.
5677 Version 0.11.0 (2014-07-02)
5678 ==========================
5680 * ~1700 changes, numerous bugfixes
5683 * ~[T] has been removed from the language. This type is superseded by
5685 * ~str has been removed from the language. This type is superseded by
5687 * ~T has been removed from the language. This type is superseded by the
5689 * @T has been removed from the language. This type is superseded by the
5690 standard library's std::gc::Gc<T> type.
5691 * Struct fields are now all private by default.
5692 * Vector indices and shift amounts are both required to be a `uint`
5693 instead of any integral type.
5694 * Byte character, byte string, and raw byte string literals are now all
5695 supported by prefixing the normal literal with a `b`.
5696 * Multiple ABIs are no longer allowed in an ABI string
5697 * The syntax for lifetimes on closures/procedures has been tweaked
5698 slightly: `<'a>|A, B|: 'b + K -> T`
5699 * Floating point modulus has been removed from the language; however it
5700 is still provided by a library implementation.
5701 * Private enum variants are now disallowed.
5702 * The `priv` keyword has been removed from the language.
5703 * A closure can no longer be invoked through a &-pointer.
5704 * The `use foo, bar, baz;` syntax has been removed from the language.
5705 * The transmute intrinsic no longer works on type parameters.
5706 * Statics now allow blocks/items in their definition.
5707 * Trait bounds are separated from objects with + instead of : now.
5708 * Objects can no longer be read while they are mutably borrowed.
5709 * The address of a static is now marked as insignificant unless the
5710 #[inline(never)] attribute is placed it.
5711 * The #[unsafe_destructor] attribute is now behind a feature gate.
5712 * Struct literals are no longer allowed in ambiguous positions such as
5713 if, while, match, and for..in.
5714 * Declaration of lang items and intrinsics are now feature-gated by
5716 * Integral literals no longer default to `int`, and floating point
5717 literals no longer default to `f64`. Literals must be suffixed with an
5718 appropriate type if inference cannot determine the type of the
5720 * The Box<T> type is no longer implicitly borrowed to &mut T.
5721 * Procedures are now required to not capture borrowed references.
5724 * The standard library is now a "facade" over a number of underlying
5725 libraries. This means that development on the standard library should
5726 be speedier due to smaller crates, as well as a clearer line between
5728 * A new library, libcore, lives under the standard library's facade
5729 which is Rust's "0-assumption" library, suitable for embedded and
5730 kernel development for example.
5731 * A regex crate has been added to the standard distribution. This crate
5732 includes statically compiled regular expressions.
5733 * The unwrap/unwrap_err methods on Result require a Show bound for
5734 better error messages.
5735 * The return types of the std::comm primitives have been centralized
5736 around the Result type.
5737 * A number of I/O primitives have gained the ability to time out their
5739 * A number of I/O primitives have gained the ability to close their
5740 reading/writing halves to cancel pending operations.
5741 * Reverse iterator methods have been removed in favor of `rev()` on
5742 their forward-iteration counterparts.
5743 * A bitflags! macro has been added to enable easy interop with C and
5744 management of bit flags.
5745 * A debug_assert! macro is now provided which is disabled when
5746 `--cfg ndebug` is passed to the compiler.
5747 * A graphviz crate has been added for creating .dot files.
5748 * The std::cast module has been migrated into std::mem.
5749 * The std::local_data api has been migrated from freestanding functions
5750 to being based on methods.
5751 * The Pod trait has been renamed to Copy.
5752 * jemalloc has been added as the default allocator for types.
5753 * The API for allocating memory has been changed to use proper alignment
5754 and sized deallocation
5755 * Connecting a TcpStream or binding a TcpListener is now based on a
5756 string address and a u16 port. This allows connecting to a hostname as
5758 * The Reader trait now contains a core method, read_at_least(), which
5759 correctly handles many repeated 0-length reads.
5760 * The process-spawning API is now centered around a builder-style
5762 * The :? printing qualifier has been moved from the standard library to
5763 an external libdebug crate.
5764 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
5765 have been renamed to Eq/Ord.
5766 * The select/plural methods have been removed from format!. The escapes
5767 for { and } have also changed from \{ and \} to {{ and }},
5769 * The TaskBuilder API has been re-worked to be a true builder, and
5770 extension traits for spawning native/green tasks have been added.
5773 * All breaking changes to the language or libraries now have their
5774 commit message annotated with `[breaking-change]` to allow for easy
5775 discovery of breaking changes.
5776 * The compiler will now try to suggest how to annotate lifetimes if a
5777 lifetime-related error occurs.
5778 * Debug info continues to be improved greatly with general bug fixes and
5779 better support for situations like link time optimization (LTO).
5780 * Usage of syntax extensions when cross-compiling has been fixed.
5781 * Functionality equivalent to GCC & Clang's -ffunction-sections,
5782 -fdata-sections and --gc-sections has been enabled by default
5783 * The compiler is now stricter about where it will load module files
5784 from when a module is declared via `mod foo;`.
5785 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
5786 Syntax extensions are now discovered via a "plugin registrar" type
5787 which will be extended in the future to other various plugins.
5788 * Lints have been restructured to allow for dynamically loadable lints.
5789 * A number of rustdoc improvements:
5790 * The HTML output has been visually redesigned.
5791 * Markdown is now powered by hoedown instead of sundown.
5792 * Searching heuristics have been greatly improved.
5793 * The search index has been reduced in size by a great amount.
5794 * Cross-crate documentation via `pub use` has been greatly improved.
5795 * Primitive types are now hyperlinked and documented.
5796 * Documentation has been moved from static.rust-lang.org/doc to
5798 * A new sandbox, play.rust-lang.org, is available for running and
5799 sharing rust code examples on-line.
5800 * Unused attributes are now more robustly warned about.
5801 * The dead_code lint now warns about unused struct fields.
5802 * Cross-compiling to iOS is now supported.
5803 * Cross-compiling to mipsel is now supported.
5804 * Stability attributes are now inherited by default and no longer apply
5805 to intra-crate usage, only inter-crate usage.
5806 * Error message related to non-exhaustive match expressions have been
5810 Version 0.10 (2014-04-03)
5811 =========================
5813 * ~1500 changes, numerous bugfixes
5816 * A new RFC process is now in place for modifying the language.
5817 * Patterns with `@`-pointers have been removed from the language.
5818 * Patterns with unique vectors (`~[T]`) have been removed from the
5820 * Patterns with unique strings (`~str`) have been removed from the
5822 * `@str` has been removed from the language.
5823 * `@[T]` has been removed from the language.
5824 * `@self` has been removed from the language.
5825 * `@Trait` has been removed from the language.
5826 * Headers on `~` allocations which contain `@` boxes inside the type for
5827 reference counting have been removed.
5828 * The semantics around the lifetimes of temporary expressions have changed,
5829 see #3511 and #11585 for more information.
5830 * Cross-crate syntax extensions are now possible, but feature gated. See
5831 #11151 for more information. This includes both `macro_rules!` macros as
5832 well as syntax extensions such as `format!`.
5833 * New lint modes have been added, and older ones have been turned on to be
5835 * Unnecessary parentheses
5838 * Uppercase variables
5839 * Publicly visible private types
5840 * `#[deriving]` with raw pointers
5841 * Unsafe functions can no longer be coerced to closures.
5842 * Various obscure macros such as `log_syntax!` are now behind feature gates.
5843 * The `#[simd]` attribute is now behind a feature gate.
5844 * Visibility is no longer allowed on `extern crate` statements, and
5845 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
5846 * Trailing commas are now allowed in argument lists and tuple patterns.
5847 * The `do` keyword has been removed, it is now a reserved keyword.
5848 * Default type parameters have been implemented, but are feature gated.
5849 * Borrowed variables through captures in closures are now considered soundly.
5850 * `extern mod` is now `extern crate`
5851 * The `Freeze` trait has been removed.
5852 * The `Share` trait has been added for types that can be shared among
5854 * Labels in macros are now hygienic.
5855 * Expression/statement macro invocations can be delimited with `{}` now.
5856 * Treatment of types allowed in `static mut` locations has been tweaked.
5857 * The `*` and `.` operators are now overloadable through the `Deref` and
5859 * `~Trait` and `proc` no longer have `Send` bounds by default.
5860 * Partial type hints are now supported with the `_` type marker.
5861 * An `Unsafe` type was introduced for interior mutability. It is now
5862 considered undefined to transmute from `&T` to `&mut T` without using the
5864 * The #[linkage] attribute was implemented for extern statics/functions.
5865 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
5866 * `Pod` was renamed to `Copy`.
5869 * The `libextra` library has been removed. It has now been decomposed into
5870 component libraries with smaller and more focused nuggets of
5871 functionality. The full list of libraries can be found on the
5872 documentation index page.
5873 * std: `std::condition` has been removed. All I/O errors are now propagated
5874 through the `Result` type. In order to assist with error handling, a
5875 `try!` macro for unwrapping errors with an early return and a lint for
5876 unused results has been added. See #12039 for more information.
5877 * std: The `vec` module has been renamed to `slice`.
5878 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
5879 This will become the only growable vector in the future.
5880 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
5881 are now found at `std::io::BufferedReader` instead of
5882 `std::io::buffered::BufferedReader`.
5883 * std: `print` and `println` are no longer in the prelude, the `print!` and
5884 `println!` macros are intended to be used instead.
5885 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
5886 attempts to statically prevent cycles.
5887 * std: The standard distribution is adopting the policy of pushing failure
5888 to the user rather than failing in libraries. Many functions (such as
5889 `slice::last()`) now return `Option<T>` instead of `T` + failing.
5890 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
5891 deriving mode: `#[deriving(Show)]`.
5892 * std: `ToStr` is now implemented for all types implementing `Show`.
5893 * std: The formatting trait methods now take `&self` instead of `&T`
5894 * std: The `invert()` method on iterators has been renamed to `rev()`
5895 * std: `std::num` has seen a reduction in the genericity of its traits,
5896 consolidating functionality into a few core traits.
5897 * std: Backtraces are now printed on task failure if the environment
5898 variable `RUST_BACKTRACE` is present.
5899 * std: Naming conventions for iterators have been standardized. More details
5900 can be found on the wiki's style guide.
5901 * std: `eof()` has been removed from the `Reader` trait. Specific types may
5902 still implement the function.
5903 * std: Networking types are now cloneable to allow simultaneous reads/writes.
5904 * std: `assert_approx_eq!` has been removed
5905 * std: The `e` and `E` formatting specifiers for floats have been added to
5906 print them in exponential notation.
5907 * std: The `Times` trait has been removed
5908 * std: Indications of variance and opting out of builtin bounds is done
5909 through marker types in `std::kinds::marker` now
5910 * std: `hash` has been rewritten, `IterBytes` has been removed, and
5911 `#[deriving(Hash)]` is now possible.
5912 * std: `SharedChan` has been removed, `Sender` is now cloneable.
5913 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
5914 * std: `Chan::new` is now `channel()`.
5915 * std: A new synchronous channel type has been implemented.
5916 * std: A `select!` macro is now provided for selecting over `Receiver`s.
5917 * std: `hashmap` and `trie` have been moved to `libcollections`
5918 * std: `run` has been rolled into `io::process`
5919 * std: `assert_eq!` now uses `{}` instead of `{:?}`
5920 * std: The equality and comparison traits have seen some reorganization.
5921 * std: `rand` has moved to `librand`.
5922 * std: `to_{lower,upper}case` has been implemented for `char`.
5923 * std: Logging has been moved to `liblog`.
5924 * collections: `HashMap` has been rewritten for higher performance and less
5926 * native: The default runtime is now `libnative`. If `libgreen` is desired,
5927 it can be booted manually. The runtime guide has more information and
5929 * native: All I/O functionality except signals has been implemented.
5930 * green: Task spawning with `libgreen` has been optimized with stack caching
5931 and various trimming of code.
5932 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
5933 * sync: The `extra::sync` module has been updated to modern rust (and moved
5934 to the `sync` library), tweaking and improving various interfaces while
5935 dropping redundant functionality.
5936 * sync: A new `Barrier` type has been added to the `sync` library.
5937 * sync: An efficient mutex for native and green tasks has been implemented.
5938 * serialize: The `base64` module has seen some improvement. It treats
5939 newlines better, has non-string error values, and has seen general
5941 * fourcc: A `fourcc!` macro was introduced
5942 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
5943 hexadecimal literal.
5946 * `rustpkg` has been deprecated and removed from the main repository. Its
5947 replacement, `cargo`, is under development.
5948 * Nightly builds of rust are now available
5949 * The memory usage of rustc has been improved many times throughout this
5951 * The build process supports disabling rpath support for the rustc binary
5953 * Code generation has improved in some cases, giving more information to the
5954 LLVM optimization passes to enable more extensive optimizations.
5955 * Debuginfo compatibility with lldb on OSX has been restored.
5956 * The master branch is now gated on an android bot, making building for
5957 android much more reliable.
5958 * Output flags have been centralized into one `--emit` flag.
5959 * Crate type flags have been centralized into one `--crate-type` flag.
5960 * Codegen flags have been consolidated behind a `-C` flag.
5961 * Linking against outdated crates now has improved error messages.
5962 * Error messages with lifetimes will often suggest how to annotate the
5963 function to fix the error.
5964 * Many more types are documented in the standard library, and new guides
5966 * Many `rustdoc` improvements:
5967 * code blocks are syntax highlighted.
5968 * render standalone markdown files.
5969 * the --test flag tests all code blocks by default.
5970 * exported macros are displayed.
5971 * re-exported types have their documentation inlined at the location of the
5973 * search works across crates that have been rendered to the same output
5977 Version 0.9 (2014-01-09)
5978 ==========================
5980 * ~1800 changes, numerous bugfixes
5983 * The `float` type has been removed. Use `f32` or `f64` instead.
5984 * A new facility for enabling experimental features (feature gating) has
5985 been added, using the crate-level `#[feature(foo)]` attribute.
5986 * Managed boxes (@) are now behind a feature gate
5987 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
5988 standard library's `Gc` or `Rc` types instead.
5989 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
5990 * Jumping back to the top of a loop is now done with `continue` instead of
5992 * Strings can no longer be mutated through index assignment.
5993 * Raw strings can be created via the basic `r"foo"` syntax or with matched
5994 hash delimiters, as in `r###"foo"###`.
5995 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
5997 * The `&fn` type is now written `|args| -> ret` to match the literal form.
5998 * `@fn`s have been removed.
5999 * `do` only works with procs in order to make it obvious what the cost
6001 * Single-element tuple-like structs can no longer be dereferenced to
6002 obtain the inner value. A more comprehensive solution for overloading
6003 the dereference operator will be provided in the future.
6004 * The `#[link(...)]` attribute has been replaced with
6005 `#[crate_id = "name#vers"]`.
6006 * Empty `impl`s must be terminated with empty braces and may not be
6007 terminated with a semicolon.
6008 * Keywords are no longer allowed as lifetime names; the `self` lifetime
6009 no longer has any special meaning.
6010 * The old `fmt!` string formatting macro has been removed.
6011 * `printf!` and `printfln!` (old-style formatting) removed in favor of
6012 `print!` and `println!`.
6013 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
6014 * The `extern mod foo (name = "bar")` syntax has been removed. Use
6015 `extern mod foo = "bar"` instead.
6016 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
6017 * Macros can have attributes.
6018 * Macros can expand to items with attributes.
6019 * Macros can expand to multiple items.
6020 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
6021 * Comments may be nested.
6022 * Values automatically coerce to trait objects they implement, without
6024 * Enum discriminants are no longer an entire word but as small as needed to
6025 contain all the variants. The `repr` attribute can be used to override
6026 the discriminant size, as in `#[repr(int)]` for integer-sized, and
6027 `#[repr(C)]` to match C enums.
6028 * Non-string literals are not allowed in attributes (they never worked).
6029 * The FFI now supports variadic functions.
6030 * Octal numeric literals, as in `0o7777`.
6031 * The `concat!` syntax extension performs compile-time string concatenation.
6032 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
6033 removed as Rust no longer uses segmented stacks.
6034 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
6035 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
6036 not `*`; ignoring remaining fields of a struct is also done with `..`,
6037 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
6038 * `rustc` supports the "win64" calling convention via `extern "win64"`.
6039 * `rustc` supports the "system" calling convention, which defaults to the
6040 preferred convention for the target platform, "stdcall" on 32-bit Windows,
6042 * The `type_overflow` lint (default: warn) checks literals for overflow.
6043 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
6044 * The `attribute_usage` lint (default: warn) warns about unknown
6046 * The `unknown_features` lint (default: warn) warns about unknown
6048 * The `dead_code` lint (default: warn) checks for dead code.
6049 * Rust libraries can be linked statically to one another
6050 * `#[link_args]` is behind the `link_args` feature gate.
6051 * Native libraries are now linked with `#[link(name = "foo")]`
6052 * Native libraries can be statically linked to a rust crate
6053 (`#[link(name = "foo", kind = "static")]`).
6054 * Native OS X frameworks are now officially supported
6055 (`#[link(name = "foo", kind = "framework")]`).
6056 * The `#[thread_local]` attribute creates thread-local (not task-local)
6057 variables. Currently behind the `thread_local` feature gate.
6058 * The `return` keyword may be used in closures.
6059 * Types that can be copied via a memcpy implement the `Pod` kind.
6060 * The `cfg` attribute can now be used on struct fields and enum variants.
6063 * std: The `option` and `result` API's have been overhauled to make them
6064 simpler, more consistent, and more composable.
6065 * std: The entire `std::io` module has been replaced with one that is
6066 more comprehensive and that properly interfaces with the underlying
6067 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
6069 * std: `io::util` contains a number of useful implementations of
6070 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
6071 `ZeroReader`, `TeeReader`.
6072 * std: The reference counted pointer type `extra::rc` moved into std.
6073 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
6074 just a wrapper around it).
6075 * std: The `Either` type has been removed.
6076 * std: `fmt::Default` can be implemented for any type to provide default
6077 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
6078 * std: The `rand` API continues to be tweaked.
6079 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
6080 on failure in gdb, is now named `rust_fail`.
6081 * std: The `each_key` and `each_value` methods on `HashMap` have been
6082 replaced by the `keys` and `values` iterators.
6083 * std: Functions dealing with type size and alignment have moved from the
6084 `sys` module to the `mem` module.
6085 * std: The `path` module was written and API changed.
6086 * std: `str::from_utf8` has been changed to cast instead of allocate.
6087 * std: `starts_with` and `ends_with` methods added to vectors via the
6088 `ImmutableEqVector` trait, which is in the prelude.
6089 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
6090 if the index is out of bounds.
6091 * std: Task failure no longer propagates between tasks, as the model was
6092 complex, expensive, and incompatible with thread-based tasks.
6093 * std: The `Any` type can be used for dynamic typing.
6094 * std: `~Any` can be passed to the `fail!` macro and retrieved via
6096 * std: Methods that produce iterators generally do not have an `_iter`
6098 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
6099 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
6100 * std: `util::ignore` renamed to `prelude::drop`.
6101 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
6103 * std: `vec::raw` has seen a lot of cleanup and API changes.
6104 * std: The standard library no longer includes any C++ code, and very
6105 minimal C, eliminating the dependency on libstdc++.
6106 * std: Runtime scheduling and I/O functionality has been factored out into
6107 extensible interfaces and is now implemented by two different crates:
6108 libnative, for native threading and I/O; and libgreen, for green threading
6109 and I/O. This paves the way for using the standard library in more limited
6110 embedded environments.
6111 * std: The `comm` module has been rewritten to be much faster, have a
6112 simpler, more consistent API, and to work for both native and green
6114 * std: All libuv dependencies have been moved into the rustuv crate.
6115 * native: New implementations of runtime scheduling on top of OS threads.
6116 * native: New native implementations of TCP, UDP, file I/O, process spawning,
6118 * green: The green thread scheduler and message passing types are almost
6120 * extra: The `flatpipes` module had bitrotted and was removed.
6121 * extra: All crypto functions have been removed and Rust now has a policy of
6122 not reimplementing crypto in the standard library. In the future crypto
6123 will be provided by external crates with bindings to established libraries.
6124 * extra: `c_vec` has been modernized.
6125 * extra: The `sort` module has been removed. Use the `sort` method on
6129 * The `rust` and `rusti` commands have been removed, due to lack of
6131 * `rustdoc` was completely rewritten.
6132 * `rustdoc` can test code examples in documentation.
6133 * `rustpkg` can test packages with the argument, 'test'.
6134 * `rustpkg` supports arbitrary dependencies, including C libraries.
6135 * `rustc`'s support for generating debug info is improved again.
6136 * `rustc` has better error reporting for unbalanced delimiters.
6137 * `rustc`'s JIT support was removed due to bitrot.
6138 * Executables and static libraries can be built with LTO (-Z lto)
6139 * `rustc` adds a `--dep-info` flag for communicating dependencies to
6143 Version 0.8 (2013-09-26)
6144 ============================
6146 * ~2200 changes, numerous bugfixes
6149 * The `for` loop syntax has changed to work with the `Iterator` trait.
6150 * At long last, unwinding works on Windows.
6151 * Default methods are ready for use.
6152 * Many trait inheritance bugs fixed.
6153 * Owned and borrowed trait objects work more reliably.
6154 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
6155 * rustc can omit emission of code for the `debug!` macro if it is passed
6157 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
6158 for foo.rs, then foo/mod.rs, and will generate an error when both are
6160 * Strings no longer contain trailing nulls. The new `std::c_str` module
6161 provides new mechanisms for converting to C strings.
6162 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
6163 * The FFI has been overhauled such that foreign functions are called directly,
6164 instead of through a stack-switching wrapper.
6165 * Calling a foreign function must be done through a Rust function with the
6166 `#[fixed_stack_segment]` attribute.
6167 * The `externfn!` macro can be used to declare both a foreign function and
6168 a `#[fixed_stack_segment]` wrapper at once.
6169 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
6170 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
6171 * `priv` is disallowed everywhere except for struct fields and enum variants.
6172 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
6173 * `ref` bindings in irrefutable patterns work correctly now.
6174 * `char` is now prevented from containing invalid code points.
6175 * Casting to `bool` is no longer allowed.
6176 * `\0` is now accepted as an escape in chars and strings.
6177 * `yield` is a reserved keyword.
6178 * `typeof` is a reserved keyword.
6179 * Crates may be imported by URL with `extern mod foo = "url";`.
6180 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
6181 * Static vectors can be initialized with repeating elements,
6182 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
6183 * Static structs can be initialized with functional record update,
6184 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
6185 * `cfg!` can be used to conditionally execute code based on the crate
6186 configuration, similarly to `#[cfg(...)]`.
6187 * The `unnecessary_qualification` lint detects unneeded module
6188 prefixes (default: allow).
6189 * Arithmetic operations have been implemented on the SIMD types in
6190 `std::unstable::simd`.
6191 * Exchange allocation headers were removed, reducing memory usage.
6192 * `format!` implements a completely new, extensible, and higher-performance
6193 string formatting system. It will replace `fmt!`.
6194 * `print!` and `println!` write formatted strings (using the `format!`
6195 extension) to stdout.
6196 * `write!` and `writeln!` write formatted strings (using the `format!`
6197 extension) to the new Writers in `std::rt::io`.
6198 * The library section in which a function or static is placed may
6199 be specified with `#[link_section = "..."]`.
6200 * The `proto!` syntax extension for defining bounded message protocols
6202 * `macro_rules!` is hygienic for `let` declarations.
6203 * The `#[export_name]` attribute specifies the name of a symbol.
6204 * `unreachable!` can be used to indicate unreachable code, and fails
6208 * std: Transitioned to the new runtime, written in Rust.
6209 * std: Added an experimental I/O library, `rt::io`, based on the new
6211 * std: A new generic `range` function was added to the prelude, replacing
6212 `uint::range` and friends.
6213 * std: `range_rev` no longer exists. Since range is an iterator it can be
6214 reversed with `range(lo, hi).invert()`.
6215 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
6216 renamed to `unwrap_or`.
6217 * std: The `iterator` module was renamed to `iter`.
6218 * std: Integral types now support the `checked_add`, `checked_sub`, and
6219 `checked_mul` operations for detecting overflow.
6220 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
6222 * std: Methods are standardizing on conventions for casting methods:
6223 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
6225 * std: The `CString` type in `c_str` provides new ways to convert to and
6227 * std: `DoubleEndedIterator` can yield elements in two directions.
6228 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
6230 * std: `str::from_bytes` renamed to `str::from_utf8`.
6231 * std: `pop_opt` and `shift_opt` methods added to vectors.
6232 * std: The task-local data interface no longer uses @, and keys are
6233 no longer function pointers.
6234 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
6235 * std: Added `SharedPort` to `comm`.
6236 * std: `Eq` has a default method for `ne`; only `eq` is required
6238 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
6239 is required in implementations.
6240 * std: `is_utf8` performance is improved, impacting many string functions.
6241 * std: `os::MemoryMap` provides cross-platform mmap.
6242 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
6243 are not 'in-bounds' are considered undefined.
6244 * std: Many freestanding functions in `vec` removed in favor of methods.
6245 * std: Many freestanding functions on scalar types removed in favor of
6247 * std: Many options to task builders were removed since they don't make
6248 sense in the new scheduler design.
6249 * std: More containers implement `FromIterator` so can be created by the
6251 * std: More complete atomic types in `unstable::atomics`.
6252 * std: `comm::PortSet` removed.
6253 * std: Mutating methods in the `Set` and `Map` traits have been moved into
6254 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
6255 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
6256 default implementations.
6257 * std: Various `from_str` functions were removed in favor of a generic
6258 `from_str` which is available in the prelude.
6259 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
6260 * extra: `dlist`, the doubly-linked list was modernized.
6261 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
6262 * extra: Added `glob` module, replacing `std::os::glob`.
6263 * extra: `rope` was removed.
6264 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
6265 * extra: `net`, and `timer` were removed. The experimental replacements
6266 are `std::rt::io::net` and `std::rt::io::timer`.
6267 * extra: Iterators implemented for `SmallIntMap`.
6268 * extra: Iterators implemented for `Bitv` and `BitvSet`.
6269 * extra: `SmallIntSet` removed. Use `BitvSet`.
6270 * extra: Performance of JSON parsing greatly improved.
6271 * extra: `semver` updated to SemVer 2.0.0.
6272 * extra: `term` handles more terminals correctly.
6273 * extra: `dbg` module removed.
6274 * extra: `par` module removed.
6275 * extra: `future` was cleaned up, with some method renames.
6276 * extra: Most free functions in `getopts` were converted to methods.
6279 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
6280 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
6281 similarly to gcc's `--march` flag.
6282 * rustc's performance compiling small crates is much better.
6283 * rustpkg has received many improvements.
6284 * rustpkg supports git tags as package IDs.
6285 * rustpkg builds into target-specific directories so it can be used for
6287 * The number of concurrent test tasks is controlled by the environment
6288 variable RUST_TEST_TASKS.
6289 * The test harness can now report metrics for benchmarks.
6290 * All tools have man pages.
6291 * Programs compiled with `--test` now support the `-h` and `--help` flags.
6292 * The runtime uses jemalloc for allocations.
6293 * Segmented stacks are temporarily disabled as part of the transition to
6294 the new runtime. Stack overflows are possible!
6295 * A new documentation backend, rustdoc_ng, is available for use. It is
6296 still invoked through the normal `rustdoc` command.
6299 Version 0.7 (2013-07-03)
6300 =======================
6302 * ~2000 changes, numerous bugfixes
6305 * `impl`s no longer accept a visibility qualifier. Put them on methods
6307 * The borrow checker has been rewritten with flow-sensitivity, fixing
6308 many bugs and inconveniences.
6309 * The `self` parameter no longer implicitly means `&'self self`,
6310 and can be explicitly marked with a lifetime.
6311 * Overloadable compound operators (`+=`, etc.) have been temporarily
6312 removed due to bugs.
6313 * The `for` loop protocol now requires `for`-iterators to return `bool`
6314 so they compose better.
6315 * The `Durable` trait is replaced with the `'static` bounds.
6316 * Trait default methods work more often.
6317 * Structs with the `#[packed]` attribute have byte alignment and
6318 no padding between fields.
6319 * Type parameters bound by `Copy` must now be copied explicitly with
6321 * It is now illegal to move out of a dereferenced unsafe pointer.
6322 * `Option<~T>` is now represented as a nullable pointer.
6323 * `@mut` does dynamic borrow checks correctly.
6324 * The `main` function is only detected at the topmost level of the crate.
6325 The `#[main]` attribute is still valid anywhere.
6326 * Struct fields may no longer be mutable. Use inherited mutability.
6327 * The `#[no_send]` attribute makes a type that would otherwise be
6329 * The `#[no_freeze]` attribute makes a type that would otherwise be
6331 * Unbounded recursion will abort the process after reaching the limit
6332 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
6333 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
6334 are never implicitly copyable.
6335 * `#[static_assert]` makes compile-time assertions about static bools.
6336 * At long last, 'argument modes' no longer exist.
6337 * The rarely used `use mod` statement no longer exists.
6340 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
6342 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
6343 `Rand`, `Zero` and `ToStr` can all be automatically derived with
6345 * The `bytes!` macro returns a vector of bytes for string, u8, char,
6346 and unsuffixed integer literals.
6349 * The `core` crate was renamed to `std`.
6350 * The `std` crate was renamed to `extra`.
6351 * More and improved documentation.
6352 * std: `iterator` module for external iterator objects.
6353 * Many old-style (internal, higher-order function) iterators replaced by
6354 implementations of `Iterator`.
6355 * std: Many old internal vector and string iterators,
6356 incl. `any`, `all`. removed.
6357 * std: The `finalize` method of `Drop` renamed to `drop`.
6358 * std: The `drop` method now takes `&mut self` instead of `&self`.
6359 * std: The prelude no longer re-exports any modules, only types and traits.
6360 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
6361 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
6362 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
6363 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
6364 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
6365 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
6366 * std: Many types implement `Clone`.
6367 * std: `path` type renamed to `Path`.
6368 * std: `mut` module and `Mut` type removed.
6369 * std: Many standalone functions removed in favor of methods and iterators
6370 in `vec`, `str`. In the future methods will also work as functions.
6371 * std: `reinterpret_cast` removed. Use `transmute`.
6372 * std: ascii string handling in `std::ascii`.
6373 * std: `Rand` is implemented for ~/@.
6374 * std: `run` module for spawning processes overhauled.
6375 * std: Various atomic types added to `unstable::atomic`.
6376 * std: Various types implement `Zero`.
6377 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
6378 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
6379 * std: Added `os::mkdir_recursive`.
6380 * std: Added `os::glob` function performs filesystems globs.
6381 * std: `FuzzyEq` renamed to `ApproxEq`.
6382 * std: `Map` now defines `pop` and `swap` methods.
6383 * std: `Cell` constructors converted to static methods.
6384 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
6385 * extra: `flate` module moved from `std` to `extra`.
6386 * extra: `fileinput` module for iterating over a series of files.
6387 * extra: `Complex` number type and `complex` module.
6388 * extra: `Rational` number type and `rational` module.
6389 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
6390 * extra: `term` uses terminfo now, is more correct.
6391 * extra: `arc` functions converted to methods.
6392 * extra: Implementation of fixed output size variations of SHA-2.
6395 * `unused_variable` lint mode for unused variables (default: warn).
6396 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
6398 * `unused_mut` lint mode for identifying unused `mut` qualifiers
6400 * `dead_assignment` lint mode for unread variables (default: warn).
6401 * `unnecessary_allocation` lint mode detects some heap allocations that are
6402 immediately borrowed so could be written without allocating (default: warn).
6403 * `missing_doc` lint mode (default: allow).
6404 * `unreachable_code` lint mode (default: warn).
6405 * The `rusti` command has been rewritten and a number of bugs addressed.
6406 * rustc outputs in color on more terminals.
6407 * rustc accepts a `--link-args` flag to pass arguments to the linker.
6408 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
6409 * Compiling with `-g` will make the binary record information about
6410 dynamic borrowcheck failures for debugging.
6411 * rustdoc has a nicer stylesheet.
6412 * Various improvements to rustdoc.
6413 * Improvements to rustpkg (see the detailed release notes).
6416 Version 0.6 (2013-04-03)
6417 ========================
6419 * ~2100 changes, numerous bugfixes
6422 * The self type parameter in traits is now spelled `Self`
6423 * The `self` parameter in trait and impl methods must now be explicitly
6424 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
6425 * Static methods no longer require the `static` keyword and instead
6426 are distinguished by the lack of a `self` parameter
6427 * Replaced the `Durable` trait with the `'static` lifetime
6428 * The old closure type syntax with the trailing sigil has been
6429 removed in favor of the more consistent leading sigil
6430 * `super` is a keyword, and may be prefixed to paths
6431 * Trait bounds are separated with `+` instead of whitespace
6432 * Traits are implemented with `impl Trait for Type`
6433 instead of `impl Type: Trait`
6434 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
6435 * The `export` keyword has finally been removed
6436 * The `move` keyword has been removed (see "Semantic changes")
6437 * The interior mutability qualifier on vectors, `[mut T]`, has been
6438 removed. Use `&mut [T]`, etc.
6439 * `mut` is no longer valid in `~mut T`. Use inherited mutability
6440 * `fail` is no longer a keyword. Use `fail!()`
6441 * `assert` is no longer a keyword. Use `assert!()`
6442 * `log` is no longer a keyword. use `debug!`, etc.
6443 * 1-tuples may be represented as `(T,)`
6444 * Struct fields may no longer be `mut`. Use inherited mutability,
6445 `@mut T`, `core::mut` or `core::cell`
6446 * `extern mod { ... }` is no longer valid syntax for foreign
6447 function modules. Use extern blocks: `extern { ... }`
6448 * Newtype enums removed. Use tuple-structs.
6449 * Trait implementations no longer support visibility modifiers
6450 * Pattern matching over vectors improved and expanded
6451 * `const` renamed to `static` to correspond to lifetime name,
6452 and make room for future `static mut` unsafe mutable globals.
6453 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
6454 * `Clone` implementations can be automatically generated with
6455 `#[deriving(Clone)]`
6456 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
6457 instead of `foo as Bar`.
6458 * Fixed length vector types are now written as `[int, .. 3]`
6459 instead of `[int * 3]`.
6460 * Fixed length vector types can express the length as a constant
6461 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
6464 * Types with owned pointers or custom destructors move by default,
6465 eliminating the `move` keyword
6466 * All foreign functions are considered unsafe
6467 * &mut is now unaliasable
6468 * Writes to borrowed @mut pointers are prevented dynamically
6470 * The name of the main function can be customized using #[main]
6471 * The default type of an inferred closure is &fn instead of @fn
6472 * `use` statements may no longer be "chained" - they cannot import
6473 identifiers imported by previous `use` statements
6474 * `use` statements are crate relative, importing from the "top"
6475 of the crate by default. Paths may be prefixed with `super::`
6476 or `self::` to change the search behavior.
6477 * Method visibility is inherited from the implementation declaration
6478 * Structural records have been removed
6479 * Many more types can be used in static items, including enums
6480 'static-lifetime pointers and vectors
6481 * Pattern matching over vectors improved and expanded
6482 * Typechecking of closure types has been overhauled to
6483 improve inference and eliminate unsoundness
6484 * Macros leave scope at the end of modules, unless that module is
6485 tagged with #[macro_escape]
6488 * Added big integers to `std::bigint`
6489 * Removed `core::oldcomm` module
6490 * Added pipe-based `core::comm` module
6491 * Numeric traits have been reorganized under `core::num`
6492 * `vec::slice` finally returns a slice
6493 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
6494 * Containers reorganized around traits in `core::container`
6495 * `core::dvec` removed, `~[T]` is a drop-in replacement
6496 * `core::send_map` renamed to `core::hashmap`
6497 * `std::map` removed; replaced with `core::hashmap`
6498 * `std::treemap` reimplemented as an owned balanced tree
6499 * `std::deque` and `std::smallintmap` reimplemented as owned containers
6500 * `core::trie` added as a fast ordered map for integer keys
6501 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
6502 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
6503 overload the comparison operators, whereas `TotalOrd` is used
6504 by certain container types
6507 * Replaced the 'cargo' package manager with 'rustpkg'
6508 * Added all-purpose 'rust' tool
6509 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
6510 * rustc now *attempts* to offer spelling suggestions
6511 * Improved support for ARM and Android
6512 * Preliminary MIPS backend
6513 * Improved foreign function ABI implementation for x86, x86_64
6514 * Various memory usage improvements
6515 * Rust code may be embedded in foreign code under limited circumstances
6516 * Inline assembler supported by new asm!() syntax extension.
6519 Version 0.5 (2012-12-21)
6520 ===========================
6522 * ~900 changes, numerous bugfixes
6525 * Removed `<-` move operator
6526 * Completed the transition from the `#fmt` extension syntax to `fmt!`
6527 * Removed old fixed length vector syntax - `[T]/N`
6528 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
6529 * Macros may now expand to items and statements
6530 * `a.b()` is always parsed as a method call, never as a field projection
6531 * `Eq` and `IterBytes` implementations can be automatically generated
6532 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
6533 * Removed the special crate language for `.rc` files
6534 * Function arguments may consist of any irrefutable pattern
6537 * `&` and `~` pointers may point to objects
6538 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
6539 * Enum variants may be structs
6540 * Destructors can be added to all nominal types with the Drop trait
6541 * Structs and nullary enum variants may be constants
6542 * Values that cannot be implicitly copied are now automatically moved
6543 without writing `move` explicitly
6544 * `&T` may now be coerced to `*T`
6545 * Coercions happen in `let` statements as well as function calls
6546 * `use` statements now take crate-relative paths
6547 * The module and type namespaces have been merged so that static
6548 method names can be resolved under the trait in which they are
6551 * Improved support for language features
6552 * Trait inheritance works in many scenarios
6553 * More support for explicit self arguments in methods - `self`, `&self`
6554 `@self`, and `~self` all generally work as expected
6555 * Static methods work in more situations
6556 * Experimental: Traits may declare default methods for the implementations
6560 * New condition handling system in `core::condition`
6561 * Timsort added to `std::sort`
6562 * New priority queue, `std::priority_queue`
6563 * Pipes for serializable types, `std::flatpipes'
6564 * Serialization overhauled to be trait-based
6565 * Expanded `getopts` definitions
6566 * Moved futures to `std`
6567 * More functions are pure now
6568 * `core::comm` renamed to `oldcomm`. Still deprecated
6569 * `rustdoc` and `cargo` are libraries now
6572 * Added a preliminary REPL, `rusti`
6573 * License changed from MIT to dual MIT/APL2
6576 Version 0.4 (2012-10-15)
6577 ==========================
6579 * ~2000 changes, numerous bugfixes
6582 * All keywords are now strict and may not be used as identifiers anywhere
6583 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
6584 'of', 'with', 'to', 'class'.
6585 * Classes are replaced with simpler structs
6586 * Explicit method self types
6587 * `ret` became `return` and `alt` became `match`
6588 * `import` is now `use`; `use is now `extern mod`
6589 * `extern mod { ... }` is now `extern { ... }`
6590 * `use mod` is the recommended way to import modules
6591 * `pub` and `priv` replace deprecated export lists
6592 * The syntax of `match` pattern arms now uses fat arrow (=>)
6593 * `main` no longer accepts an args vector; use `os::args` instead
6596 * Trait implementations are now coherent, ala Haskell typeclasses
6597 * Trait methods may be static
6598 * Argument modes are deprecated
6599 * Borrowed pointers are much more mature and recommended for use
6600 * Strings and vectors in the static region are stored in constant memory
6601 * Typestate was removed
6602 * Resolution rewritten to be more reliable
6603 * Support for 'dual-mode' data structures (freezing and thawing)
6606 * Most binary operators can now be overloaded via the traits in
6608 * `std::net::url` for representing URLs
6609 * Sendable hash maps in `core::send_map`
6610 * `core::task' gained a (currently unsafe) task-local storage API
6613 * An efficient new intertask communication primitive called the pipe,
6614 along with a number of higher-level channel types, in `core::pipes`
6615 * `std::arc`, an atomically reference counted, immutable, shared memory
6617 * `std::sync`, various exotic synchronization tools based on arcs and pipes
6618 * Futures are now based on pipes and sendable
6619 * More robust linked task failure
6620 * Improved task builder API
6623 * Improved error reporting
6624 * Preliminary JIT support
6625 * Preliminary work on precise GC
6626 * Extensive architectural improvements to rustc
6627 * Begun a transition away from buggy C++-based reflection (shape) code to
6628 Rust-based (visitor) code
6629 * All hash functions and tables converted to secure, randomized SipHash
6632 Version 0.3 (2012-07-12)
6633 ========================
6635 * ~1900 changes, numerous bugfixes
6637 * New coding conveniences
6638 * Integer-literal suffix inference
6639 * Per-item control over warnings, errors
6640 * #[cfg(windows)] and #[cfg(unix)] attributes
6641 * Documentation comments
6642 * More compact closure syntax
6643 * 'do' expressions for treating higher-order functions as
6645 * *-patterns (wildcard extended to all constructor fields)
6648 * Name resolution pass and exhaustiveness checker rewritten
6649 * Region pointers and borrow checking supersede alias
6651 * Init-ness checking is now provided by a region-based liveness
6652 pass instead of the typestate pass; same for last-use analysis
6653 * Extensive work on region pointers
6655 * Experimental new language features
6656 * Slices and fixed-size, interior-allocated vectors
6657 * #!-comments for lang versioning, shell execution
6658 * Destructors and iface implementation for classes;
6659 type-parameterized classes and class methods
6660 * 'const' type kind for types that can be used to implement
6661 shared-memory concurrency patterns
6665 * Removal of various obsolete features
6666 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
6667 'crust', 'native' (now 'extern'), 'cont' (now 'again')
6669 * Constructs: do-while loops ('do' repurposed), fn binding,
6670 resources (replaced by destructors)
6672 * Compiler reorganization
6673 * Syntax-layer of compiler split into separate crate
6674 * Clang (from LLVM project) integrated into build
6675 * Typechecker split into sub-modules
6678 * New time functions
6679 * Extension methods for many built-in types
6680 * Arc: atomic-refcount read-only / exclusive-use shared cells
6681 * Par: parallel map and search routines
6682 * Extensive work on libuv interface
6683 * Much vector code moved to libraries
6684 * Syntax extensions: #line, #col, #file, #mod, #stringify,
6685 #include, #include_str, #include_bin
6688 * Cargo automatically resolves dependencies
6691 Version 0.2 (2012-03-29)
6692 =========================
6694 * >1500 changes, numerous bugfixes
6696 * New docs and doc tooling
6698 * New port: FreeBSD x86_64
6700 * Compilation model enhancements
6701 * Generics now specialized, multiply instantiated
6702 * Functions now inlined across separate crates
6704 * Scheduling, stack and threading fixes
6705 * Noticeably improved message-passing performance
6706 * Explicit schedulers
6710 * Experimental new language features
6711 * Operator overloading
6715 * Various language extensions
6716 * C-callback function types: 'crust fn ...'
6717 * Infinite-loop construct: 'loop { ... }'
6718 * Shorten 'mutable' to 'mut'
6719 * Required mutable-local qualifier: 'let mut ...'
6720 * Basic glob-exporting: 'export foo::*;'
6721 * Alt now exhaustive, 'alt check' for runtime-checked
6722 * Block-function form of 'for' loop, with 'break' and 'ret'.
6725 * AST quasi-quote syntax extension
6726 * Revived libuv interface
6727 * New modules: core::{future, iter}, std::arena
6728 * Merged per-platform std::{os*, fs*} to core::{libc, os}
6729 * Extensive cleanup, regularization in libstd, libcore
6732 Version 0.1 (2012-01-20)
6733 ===============================
6735 * Most language features work, including:
6736 * Unique pointers, unique closures, move semantics
6737 * Interface-constrained generics
6738 * Static interface dispatch
6740 * Multithread task scheduling
6741 * Typestate predicates
6742 * Failure unwinding, destructors
6743 * Pattern matching and destructuring assignment
6744 * Lightweight block-lambda syntax
6745 * Preliminary macro-by-example
6747 * Compiler works with the following configurations:
6748 * Linux: x86 and x86_64 hosts and targets
6749 * macOS: x86 and x86_64 hosts and targets
6750 * Windows: x86 hosts and targets
6752 * Cross compilation / multi-target configuration supported.
6754 * Preliminary API-documentation and package-management tools included.
6758 * Documentation is incomplete.
6760 * Performance is below intended target.
6762 * Standard library APIs are subject to extensive change, reorganization.
6764 * Language-level versioning is not yet operational - future code will