1 Version 1.29.2 (2018-10-11)
2 ===========================
4 - [Workaround for an aliasing-related LLVM bug, which caused miscompilation.][54639]
5 - The `rls-preview` component on the windows-gnu targets has been restored.
7 [54639]: https://github.com/rust-lang/rust/pull/54639
9 Version 1.29.1 (2018-09-25)
10 ===========================
15 - The standard library's `str::repeat` function contained an out of bounds write
16 caused by an integer overflow. This has been fixed by deterministically
17 panicking when an overflow happens.
19 Thank you to Scott McMurray for responsibily disclosing this vulnerability to
22 Version 1.29.0 (2018-09-13)
23 ==========================
27 - [Bumped minimum LLVM version to 5.0.][51899]
28 - [Added `powerpc64le-unknown-linux-musl` target.][51619]
29 - [Added `aarch64-unknown-hermit` and `x86_64-unknown-hermit` targets.][52861]
33 - [`Once::call_once` now no longer requires `Once` to be `'static`.][52239]
34 - [`BuildHasherDefault` now implements `PartialEq` and `Eq`.][52402]
35 - [`Box<CStr>`, `Box<OsStr>`, and `Box<Path>` now implement `Clone`.][51912]
36 - [Implemented `PartialEq<&str>` for `OsString` and `PartialEq<OsString>`
38 - [`Cell<T>` now allows `T` to be unsized.][50494]
39 - [`SocketAddr` is now stable on Redox.][52656]
44 - [`Iterator::flatten`]
49 - [Cargo can silently fix some bad lockfiles ][cargo/5831] You can use
50 `--locked` to disable this behaviour.
51 - [`cargo-install` will now allow you to cross compile an install
52 using `--target`][cargo/5614]
53 - [Added the `cargo-fix` subcommand to automatically move project code from
54 2015 edition to 2018.][cargo/5723]
55 - [`cargo doc` can now optionally document private types using the
56 `--document-private-items` flag.][cargo/5543]
60 - [`rustdoc` now has the `--cap-lints` option which demotes all lints above
61 the specified level to that level.][52354] For example `--cap-lints warn`
62 will demote `deny` and `forbid` lints to `warn`.
63 - [`rustc` and `rustdoc` will now have the exit code of `1` if compilation
64 fails, and `101` if there is a panic.][52197]
65 - [A preview of clippy has been made available through rustup.][51122]
66 You can install the preview with `rustup component add clippy-preview`
70 - [`str::{slice_unchecked, slice_unchecked_mut}` are now deprecated.][51807]
71 Use `str::get_unchecked(begin..end)` instead.
72 - [`std::env::home_dir` is now deprecated for its unintuitive behaviour.][51656]
73 Consider using the `home_dir` function from
74 https://crates.io/crates/dirs instead.
75 - [`rustc` will no longer silently ignore invalid data in target spec.][52330]
77 [52861]: https://github.com/rust-lang/rust/pull/52861/
78 [52656]: https://github.com/rust-lang/rust/pull/52656/
79 [52239]: https://github.com/rust-lang/rust/pull/52239/
80 [52330]: https://github.com/rust-lang/rust/pull/52330/
81 [52354]: https://github.com/rust-lang/rust/pull/52354/
82 [52402]: https://github.com/rust-lang/rust/pull/52402/
83 [52103]: https://github.com/rust-lang/rust/pull/52103/
84 [52197]: https://github.com/rust-lang/rust/pull/52197/
85 [51807]: https://github.com/rust-lang/rust/pull/51807/
86 [51899]: https://github.com/rust-lang/rust/pull/51899/
87 [51912]: https://github.com/rust-lang/rust/pull/51912/
88 [51511]: https://github.com/rust-lang/rust/pull/51511/
89 [51619]: https://github.com/rust-lang/rust/pull/51619/
90 [51656]: https://github.com/rust-lang/rust/pull/51656/
91 [51178]: https://github.com/rust-lang/rust/pull/51178/
92 [51122]: https://github.com/rust-lang/rust/pull/51122
93 [50494]: https://github.com/rust-lang/rust/pull/50494/
94 [cargo/5543]: https://github.com/rust-lang/cargo/pull/5543
95 [cargo/5614]: https://github.com/rust-lang/cargo/pull/5614/
96 [cargo/5723]: https://github.com/rust-lang/cargo/pull/5723/
97 [cargo/5831]: https://github.com/rust-lang/cargo/pull/5831/
98 [`Arc::downcast`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.downcast
99 [`Iterator::flatten`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.flatten
100 [`Rc::downcast`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.downcast
103 Version 1.28.0 (2018-08-02)
104 ===========================
108 - [The `#[repr(transparent)]` attribute is now stable.][51562] This attribute
109 allows a Rust newtype wrapper (`struct NewType<T>(T);`) to be represented as
110 the inner type across Foreign Function Interface (FFI) boundaries.
111 - [The keywords `pure`, `sizeof`, `alignof`, and `offsetof` have been unreserved
112 and can now be used as identifiers.][51196]
113 - [The `GlobalAlloc` trait and `#[global_allocator]` attribute are now
114 stable.][51241] This will allow users to specify a global allocator for
116 - [Unit test functions marked with the `#[test]` attribute can now return
117 `Result<(), E: Debug>` in addition to `()`.][51298]
118 - [The `lifetime` specifier for `macro_rules!` is now stable.][50385] This
119 allows macros to easily target lifetimes.
123 - [The `s` and `z` optimisation levels are now stable.][50265] These optimisations
124 prioritise making smaller binary sizes. `z` is the same as `s` with the
125 exception that it does not vectorise loops, which typically results in an even
127 - [The short error format is now stable.][49546] Specified with
128 `--error-format=short` this option will provide a more compressed output of
130 - [Added a lint warning when you have duplicated `macro_export`s.][50143]
131 - [Reduced the number of allocations in the macro parser.][50855] This can
132 improve compile times of macro heavy crates on average by 5%.
136 - [Implemented `Default` for `&mut str`.][51306]
137 - [Implemented `From<bool>` for all integer and unsigned number types.][50554]
138 - [Implemented `Extend` for `()`.][50234]
139 - [The `Debug` implementation of `time::Duration` should now be more easily
140 human readable.][50364] Previously a `Duration` of one second would printed as
141 `Duration { secs: 1, nanos: 0 }` and will now be printed as `1s`.
142 - [Implemented `From<&String>` for `Cow<str>`, `From<&Vec<T>>` for `Cow<[T]>`,
143 `From<Cow<CStr>>` for `CString`, `From<CString>, From<CStr>, From<&CString>`
144 for `Cow<CStr>`, `From<OsString>, From<OsStr>, From<&OsString>` for
145 `Cow<OsStr>`, `From<&PathBuf>` for `Cow<Path>`, and `From<Cow<Path>>`
146 for `PathBuf`.][50170]
147 - [Implemented `Shl` and `Shr` for `Wrapping<u128>`
148 and `Wrapping<i128>`.][50465]
149 - [`DirEntry::metadata` now uses `fstatat` instead of `lstat` when
150 possible.][51050] This can provide up to a 40% speed increase.
151 - [Improved error messages when using `format!`.][50610]
155 - [`Iterator::step_by`]
156 - [`Path::ancestors`]
157 - [`SystemTime::UNIX_EPOCH`]
158 - [`alloc::GlobalAlloc`]
160 - [`alloc::LayoutErr`]
163 - [`alloc::alloc_zeroed`]
166 - [`alloc::handle_alloc_error`]
167 - [`btree_map::Entry::or_default`]
169 - [`hash_map::Entry::or_default`]
170 - [`iter::repeat_with`]
171 - [`num::NonZeroUsize`]
172 - [`num::NonZeroU128`]
173 - [`num::NonZeroU16`]
174 - [`num::NonZeroU32`]
175 - [`num::NonZeroU64`]
177 - [`ops::RangeBounds`]
178 - [`slice::SliceIndex`]
179 - [`slice::from_mut`]
180 - [`slice::from_ref`]
181 - [`{Any + Send + Sync}::downcast_mut`]
182 - [`{Any + Send + Sync}::downcast_ref`]
183 - [`{Any + Send + Sync}::is`]
187 - [Cargo will now no longer allow you to publish crates with build scripts that
188 modify the `src` directory.][cargo/5584] The `src` directory in a crate should be
189 considered to be immutable.
193 - [The `suggestion_applicability` field in `rustc`'s json output is now
194 stable.][50486] This will allow dev tools to check whether a code suggestion
199 - [Rust will consider trait objects with duplicated constraints to be the same
200 type as without the duplicated constraint.][51276] For example the below code will
206 fn test(&self) { println!("one"); } //~ ERROR duplicate definitions with name `test`
209 impl Trait + Send + Send {
210 fn test(&self) { println!("two"); }
214 [49546]: https://github.com/rust-lang/rust/pull/49546/
215 [50143]: https://github.com/rust-lang/rust/pull/50143/
216 [50170]: https://github.com/rust-lang/rust/pull/50170/
217 [50234]: https://github.com/rust-lang/rust/pull/50234/
218 [50265]: https://github.com/rust-lang/rust/pull/50265/
219 [50364]: https://github.com/rust-lang/rust/pull/50364/
220 [50385]: https://github.com/rust-lang/rust/pull/50385/
221 [50465]: https://github.com/rust-lang/rust/pull/50465/
222 [50486]: https://github.com/rust-lang/rust/pull/50486/
223 [50554]: https://github.com/rust-lang/rust/pull/50554/
224 [50610]: https://github.com/rust-lang/rust/pull/50610/
225 [50855]: https://github.com/rust-lang/rust/pull/50855/
226 [51050]: https://github.com/rust-lang/rust/pull/51050/
227 [51196]: https://github.com/rust-lang/rust/pull/51196/
228 [51200]: https://github.com/rust-lang/rust/pull/51200/
229 [51241]: https://github.com/rust-lang/rust/pull/51241/
230 [51276]: https://github.com/rust-lang/rust/pull/51276/
231 [51298]: https://github.com/rust-lang/rust/pull/51298/
232 [51306]: https://github.com/rust-lang/rust/pull/51306/
233 [51562]: https://github.com/rust-lang/rust/pull/51562/
234 [cargo/5584]: https://github.com/rust-lang/cargo/pull/5584/
235 [`Iterator::step_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.step_by
236 [`Path::ancestors`]: https://doc.rust-lang.org/std/path/struct.Path.html#method.ancestors
237 [`SystemTime::UNIX_EPOCH`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#associatedconstant.UNIX_EPOCH
238 [`alloc::GlobalAlloc`]: https://doc.rust-lang.org/std/alloc/trait.GlobalAlloc.html
239 [`alloc::Layout`]: https://doc.rust-lang.org/std/alloc/struct.Layout.html
240 [`alloc::LayoutErr`]: https://doc.rust-lang.org/std/alloc/struct.LayoutErr.html
241 [`alloc::System`]: https://doc.rust-lang.org/std/alloc/struct.System.html
242 [`alloc::alloc`]: https://doc.rust-lang.org/std/alloc/fn.alloc.html
243 [`alloc::alloc_zeroed`]: https://doc.rust-lang.org/std/alloc/fn.alloc_zeroed.html
244 [`alloc::dealloc`]: https://doc.rust-lang.org/std/alloc/fn.dealloc.html
245 [`alloc::realloc`]: https://doc.rust-lang.org/std/alloc/fn.realloc.html
246 [`alloc::handle_alloc_error`]: https://doc.rust-lang.org/std/alloc/fn.handle_alloc_error.html
247 [`btree_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.or_default
248 [`fmt::Alignment`]: https://doc.rust-lang.org/std/fmt/enum.Alignment.html
249 [`hash_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.or_default
250 [`iter::repeat_with`]: https://doc.rust-lang.org/std/iter/fn.repeat_with.html
251 [`num::NonZeroUsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroUsize.html
252 [`num::NonZeroU128`]: https://doc.rust-lang.org/std/num/struct.NonZeroU128.html
253 [`num::NonZeroU16`]: https://doc.rust-lang.org/std/num/struct.NonZeroU16.html
254 [`num::NonZeroU32`]: https://doc.rust-lang.org/std/num/struct.NonZeroU32.html
255 [`num::NonZeroU64`]: https://doc.rust-lang.org/std/num/struct.NonZeroU64.html
256 [`num::NonZeroU8`]: https://doc.rust-lang.org/std/num/struct.NonZeroU8.html
257 [`ops::RangeBounds`]: https://doc.rust-lang.org/std/ops/trait.RangeBounds.html
258 [`slice::SliceIndex`]: https://doc.rust-lang.org/std/slice/trait.SliceIndex.html
259 [`slice::from_mut`]: https://doc.rust-lang.org/std/slice/fn.from_mut.html
260 [`slice::from_ref`]: https://doc.rust-lang.org/std/slice/fn.from_ref.html
261 [`{Any + Send + Sync}::downcast_mut`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_mut-2
262 [`{Any + Send + Sync}::downcast_ref`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_ref-2
263 [`{Any + Send + Sync}::is`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.is-2
265 Version 1.27.2 (2018-07-20)
266 ===========================
271 - The borrow checker was fixed to avoid potential unsoundness when using
272 match ergonomics: [#52213][52213].
274 [52213]: https://github.com/rust-lang/rust/issues/52213
276 Version 1.27.1 (2018-07-10)
277 ===========================
282 - rustdoc would execute plugins in the /tmp/rustdoc/plugins directory
283 when running, which enabled executing code as some other user on a
284 given machine. This release fixes that vulnerability; you can read
285 more about this on the [blog][rustdoc-sec]. The associated CVE is [CVE-2018-1000622].
287 Thank you to Red Hat for responsibily disclosing this vulnerability to us.
292 - The borrow checker was fixed to avoid an additional potential unsoundness when using
293 match ergonomics: [#51415][51415], [#49534][49534].
295 [51415]: https://github.com/rust-lang/rust/issues/51415
296 [49534]: https://github.com/rust-lang/rust/issues/49534
297 [rustdoc-sec]: https://blog.rust-lang.org/2018/07/06/security-advisory-for-rustdoc.html
298 [CVE-2018-1000622]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=%20CVE-2018-1000622
300 Version 1.27.0 (2018-06-21)
301 ==========================
305 - [Removed 'proc' from the reserved keywords list.][49699] This allows `proc` to
306 be used as an identifier.
307 - [The dyn syntax is now available.][49968] This syntax is equivalent to the
308 bare `Trait` syntax, and should make it clearer when being used in tandem with
309 `impl Trait`. Since it is equivalent to the following syntax:
310 `&Trait == &dyn Trait`, `&mut Trait == &mut dyn Trait`, and
311 `Box<Trait> == Box<dyn Trait>`.
312 - [Attributes on generic parameters such as types and lifetimes are
313 now stable.][48851] e.g.
314 `fn foo<#[lifetime_attr] 'a, #[type_attr] T: 'a>() {}`
315 - [The `#[must_use]` attribute can now also be used on functions as well as
316 types.][48925] It provides a lint that by default warns users when the
317 value returned by a function has not been used.
321 - [Added the `armv5te-unknown-linux-musleabi` target.][50423]
325 - [SIMD (Single Instruction Multiple Data) on x86/x86_64 is now stable.][49664]
326 This includes [`arch::x86`] & [`arch::x86_64`] modules which contain
327 SIMD intrinsics, a new macro called `is_x86_feature_detected!`, the
328 `#[target_feature(enable="")]` attribute, and adding `target_feature = ""` to
330 - [A lot of methods for `[u8]`, `f32`, and `f64` previously only available in
331 std are now available in core.][49896]
332 - [The generic `Rhs` type parameter on `ops::{Shl, ShlAssign, Shr}` now defaults
334 - [`std::str::replace` now has the `#[must_use]` attribute][50177] to clarify
335 that the operation isn't done in place.
336 - [`Clone::clone`, `Iterator::collect`, and `ToOwned::to_owned` now have
337 the `#[must_use]` attribute][49533] to warn about unused potentially
338 expensive allocations.
342 - [`DoubleEndedIterator::rfind`]
343 - [`DoubleEndedIterator::rfold`]
344 - [`DoubleEndedIterator::try_rfold`]
345 - [`Duration::from_micros`]
346 - [`Duration::from_nanos`]
347 - [`Duration::subsec_micros`]
348 - [`Duration::subsec_millis`]
349 - [`HashMap::remove_entry`]
350 - [`Iterator::try_fold`]
351 - [`Iterator::try_for_each`]
354 - [`String::replace_range`]
355 - [`Take::set_limit`]
356 - [`hint::unreachable_unchecked`]
357 - [`os::unix::process::parent_id`]
358 - [`ptr::swap_nonoverlapping`]
359 - [`slice::rsplit_mut`]
361 - [`slice::swap_with_slice`]
365 - [`cargo-metadata` now includes `authors`, `categories`, `keywords`,
366 `readme`, and `repository` fields.][cargo/5386]
367 - [`cargo-metadata` now includes a package's `metadata` table.][cargo/5360]
368 - [Added the `--target-dir` optional argument.][cargo/5393] This allows you to specify
369 a different directory than `target` for placing compilation artifacts.
370 - [Cargo will be adding automatic target inference for binaries, benchmarks,
371 examples, and tests in the Rust 2018 edition.][cargo/5335] If your project specifies
372 specific targets e.g. using `[[bin]]` and have other binaries in locations
373 where cargo would infer a binary, Cargo will produce a warning. You can
374 disable this feature ahead of time by setting any of the following `autobins`,
375 `autobenches`, `autoexamples`, `autotests` to false.
376 - [Cargo will now cache compiler information.][cargo/5359] This can be disabled by
377 setting `CARGO_CACHE_RUSTC_INFO=0` in your environment.
381 - [Added “The Rustc book” into the official documentation.][49707]
382 [“The Rustc book”] documents and teaches how to use the rustc compiler.
383 - [All books available on `doc.rust-lang.org` are now searchable.][49623]
387 - [Calling a `CharExt` or `StrExt` method directly on core will no longer
388 work.][49896] e.g. `::core::prelude::v1::StrExt::is_empty("")` will not
389 compile, `"".is_empty()` will still compile.
390 - [`Debug` output on `atomic::{AtomicBool, AtomicIsize, AtomicPtr, AtomicUsize}`
391 will only print the inner type.][48553] e.g.
392 `print!("{:?}", AtomicBool::new(true))` will print `true`
393 not `AtomicBool(true)`.
394 - [The maximum number for `repr(align(N))` is now 2²⁹.][50378] Previously you
395 could enter higher numbers but they were not supported by LLVM. Up to 512MB
396 alignment should cover all use cases.
397 - The `.description()` method on the `std::error::Error` trait
398 [has been soft-deprecated][50163]. It is no longer required to implement it.
400 [48553]: https://github.com/rust-lang/rust/pull/48553/
401 [48851]: https://github.com/rust-lang/rust/pull/48851/
402 [48925]: https://github.com/rust-lang/rust/pull/48925/
403 [49533]: https://github.com/rust-lang/rust/pull/49533/
404 [49623]: https://github.com/rust-lang/rust/pull/49623/
405 [49630]: https://github.com/rust-lang/rust/pull/49630/
406 [49664]: https://github.com/rust-lang/rust/pull/49664/
407 [49699]: https://github.com/rust-lang/rust/pull/49699/
408 [49707]: https://github.com/rust-lang/rust/pull/49707/
409 [49719]: https://github.com/rust-lang/rust/pull/49719/
410 [49896]: https://github.com/rust-lang/rust/pull/49896/
411 [49968]: https://github.com/rust-lang/rust/pull/49968/
412 [50163]: https://github.com/rust-lang/rust/pull/50163
413 [50177]: https://github.com/rust-lang/rust/pull/50177/
414 [50378]: https://github.com/rust-lang/rust/pull/50378/
415 [50398]: https://github.com/rust-lang/rust/pull/50398/
416 [50423]: https://github.com/rust-lang/rust/pull/50423/
417 [cargo/5203]: https://github.com/rust-lang/cargo/pull/5203/
418 [cargo/5335]: https://github.com/rust-lang/cargo/pull/5335/
419 [cargo/5359]: https://github.com/rust-lang/cargo/pull/5359/
420 [cargo/5360]: https://github.com/rust-lang/cargo/pull/5360/
421 [cargo/5386]: https://github.com/rust-lang/cargo/pull/5386/
422 [cargo/5393]: https://github.com/rust-lang/cargo/pull/5393/
423 [`DoubleEndedIterator::rfind`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfind
424 [`DoubleEndedIterator::rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfold
425 [`DoubleEndedIterator::try_rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.try_rfold
426 [`Duration::from_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_micros
427 [`Duration::from_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_nanos
428 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
429 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
430 [`HashMap::remove_entry`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.remove_entry
431 [`Iterator::try_fold`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_fold
432 [`Iterator::try_for_each`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_for_each
433 [`NonNull::cast`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.cast
434 [`Option::filter`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.filter
435 [`String::replace_range`]: https://doc.rust-lang.org/std/string/struct.String.html#method.replace_range
436 [`Take::set_limit`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.set_limit
437 [`hint::unreachable_unchecked`]: https://doc.rust-lang.org/std/hint/fn.unreachable_unchecked.html
438 [`os::unix::process::parent_id`]: https://doc.rust-lang.org/std/os/unix/process/fn.parent_id.html
439 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
440 [`ptr::swap_nonoverlapping`]: https://doc.rust-lang.org/std/ptr/fn.swap_nonoverlapping.html
441 [`slice::rsplit_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit_mut
442 [`slice::rsplit`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit
443 [`slice::swap_with_slice`]: https://doc.rust-lang.org/std/primitive.slice.html#method.swap_with_slice
444 [`arch::x86_64`]: https://doc.rust-lang.org/std/arch/x86_64/index.html
445 [`arch::x86`]: https://doc.rust-lang.org/std/arch/x86/index.html
446 [“The Rustc book”]: https://doc.rust-lang.org/rustc
449 Version 1.26.2 (2018-06-05)
450 ==========================
455 - [The borrow checker was fixed to avoid unsoundness when using match ergonomics][51117]
457 [51117]: https://github.com/rust-lang/rust/issues/51117
460 Version 1.26.1 (2018-05-29)
461 ==========================
466 - [RLS now works on Windows][50646]
467 - [Rustfmt stopped badly formatting text in some cases][rustfmt/2695]
473 - [`fn main() -> impl Trait` no longer works for non-Termination
475 This reverts an accidental stabilization.
476 - [`NaN > NaN` no longer returns true in const-fn contexts][50812]
477 - [Prohibit using turbofish for `impl Trait` in method arguments][50950]
479 [50646]: https://github.com/rust-lang/rust/issues/50646
480 [50656]: https://github.com/rust-lang/rust/pull/50656
481 [50812]: https://github.com/rust-lang/rust/pull/50812
482 [50950]: https://github.com/rust-lang/rust/issues/50950
483 [rustfmt/2695]: https://github.com/rust-lang-nursery/rustfmt/issues/2695
485 Version 1.26.0 (2018-05-10)
486 ==========================
490 - [Closures now implement `Copy` and/or `Clone` if all captured variables
491 implement either or both traits.][49299]
492 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
493 - [The `'_` lifetime is now stable. The underscore lifetime can be used anywhere where a
494 lifetime can be elided.][49458]
495 - [`impl Trait` is now stable allowing you to have abstract types in returns
496 or in function parameters.][49255] e.g. `fn foo() -> impl Iterator<Item=u8>` or
497 `fn open(path: impl AsRef<Path>)`.
498 - [Pattern matching will now automatically apply dereferences.][49394]
499 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
500 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
501 - [A lot of operations are now available in a const context.][46882] E.g. You
502 can now index into constant arrays, reference and dereference into constants,
503 and use Tuple struct constructors.
504 - [Fixed entry slice patterns are now stable.][48516] e.g.
506 let points = [1, 2, 3, 4];
508 [1, 2, 3, 4] => println!("All points were sequential."),
509 _ => println!("Not all points were sequential."),
516 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
517 - [Fixed exponential projection complexity on nested types.][48296]
518 This can provide up to a ~12% reduction in compile times for certain crates.
519 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
520 to remap path prefixes outputted by the compiler.
521 - [Added `powerpc-unknown-netbsd` target.][48281]
525 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
526 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
527 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
528 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
529 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
530 - [`ascii::escape_default` is now available in libcore.][48735]
531 - [Trailing commas are now supported in std and core macros.][48056]
532 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
533 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
538 - [`*const T::copy_to_nonoverlapping`]
539 - [`*const T::copy_to`]
540 - [`*const T::read_unaligned`]
541 - [`*const T::read_volatile`]
544 - [`*const T::wrapping_add`]
545 - [`*const T::wrapping_sub`]
547 - [`*mut T::copy_to_nonoverlapping`]
548 - [`*mut T::copy_to`]
549 - [`*mut T::read_unaligned`]
550 - [`*mut T::read_volatile`]
552 - [`*mut T::replace`]
555 - [`*mut T::wrapping_add`]
556 - [`*mut T::wrapping_sub`]
557 - [`*mut T::write_bytes`]
558 - [`*mut T::write_unaligned`]
559 - [`*mut T::write_volatile`]
562 - [`FromUtf8Error::as_bytes`]
563 - [`LocalKey::try_with`]
565 - [`btree_map::Entry::and_modify`]
566 - [`fs::read_to_string`]
569 - [`hash_map::Entry::and_modify`]
570 - [`iter::FusedIterator`]
571 - [`ops::RangeInclusive`]
572 - [`ops::RangeToInclusive`]
574 - [`slice::rotate_left`]
575 - [`slice::rotate_right`]
581 - [Cargo will now output path to custom commands when `-v` is
582 passed with `--list`][cargo/5041]
583 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
587 - [The second edition of "The Rust Programming Language" book is now recommended
588 over the first.][48404]
593 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
594 syntax is now invalid.
596 use std::ops::Fn as dyn;
597 fn g(_: Box<dyn(std::fmt::Debug)>) {}
599 - [The result of dereferences are no longer promoted to `'static`.][47408]
603 const PAIR: &(i32, i32) = &(0, 1);
604 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
607 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
608 - [`".e0"` will now no longer parse as `0.0` and will instead cause
610 - [Removed hoedown from rustdoc.][48274]
611 - [Bounds on higher-kinded lifetimes a hard error.][48326]
613 [46882]: https://github.com/rust-lang/rust/pull/46882
614 [47379]: https://github.com/rust-lang/rust/pull/47379
615 [47408]: https://github.com/rust-lang/rust/pull/47408
616 [47813]: https://github.com/rust-lang/rust/pull/47813
617 [48056]: https://github.com/rust-lang/rust/pull/48056
618 [48125]: https://github.com/rust-lang/rust/pull/48125
619 [48166]: https://github.com/rust-lang/rust/pull/48166
620 [48235]: https://github.com/rust-lang/rust/pull/48235
621 [48274]: https://github.com/rust-lang/rust/pull/48274
622 [48281]: https://github.com/rust-lang/rust/pull/48281
623 [48296]: https://github.com/rust-lang/rust/pull/48296
624 [48326]: https://github.com/rust-lang/rust/pull/48326
625 [48359]: https://github.com/rust-lang/rust/pull/48359
626 [48404]: https://github.com/rust-lang/rust/pull/48404
627 [48481]: https://github.com/rust-lang/rust/pull/48481
628 [48516]: https://github.com/rust-lang/rust/pull/48516
629 [48628]: https://github.com/rust-lang/rust/pull/48628
630 [48629]: https://github.com/rust-lang/rust/pull/48629
631 [48657]: https://github.com/rust-lang/rust/pull/48657
632 [48735]: https://github.com/rust-lang/rust/pull/48735
633 [48978]: https://github.com/rust-lang/rust/pull/48978
634 [49101]: https://github.com/rust-lang/rust/pull/49101
635 [49109]: https://github.com/rust-lang/rust/pull/49109
636 [49121]: https://github.com/rust-lang/rust/pull/49121
637 [49162]: https://github.com/rust-lang/rust/pull/49162
638 [49184]: https://github.com/rust-lang/rust/pull/49184
639 [49234]: https://github.com/rust-lang/rust/pull/49234
640 [49255]: https://github.com/rust-lang/rust/pull/49255
641 [49299]: https://github.com/rust-lang/rust/pull/49299
642 [49305]: https://github.com/rust-lang/rust/pull/49305
643 [49394]: https://github.com/rust-lang/rust/pull/49394
644 [49458]: https://github.com/rust-lang/rust/pull/49458
645 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
646 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
647 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
648 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
649 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
650 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
651 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
652 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
653 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
654 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
655 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
656 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
657 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
658 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
659 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
660 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
661 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
662 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
663 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
664 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
665 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
666 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
667 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
668 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
669 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
670 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
671 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
672 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
673 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
674 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
675 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
676 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
677 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
678 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
679 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
680 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
681 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
682 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
683 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
684 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
685 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
686 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
689 Version 1.25.0 (2018-03-29)
690 ==========================
694 - [The `#[repr(align(x))]` attribute is now stable.][47006] [RFC 1358]
695 - [You can now use nested groups of imports.][47948]
696 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
697 - [You can now have `|` at the start of a match arm.][47947] e.g.
705 | Foo::B => println!("AB"),
706 | Foo::C => println!("C"),
713 - [Upgraded to LLVM 6.][47828]
714 - [Added `-C lto=val` option.][47521]
715 - [Added `i586-unknown-linux-musl` target][47282]
719 - [Impl Send for `process::Command` on Unix.][47760]
720 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
721 - [`UnsafeCell::into_inner` is now safe.][47204]
722 - [Implement libstd for CloudABI.][47268]
723 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
724 - [Implement `AsRef<Path>` for Component][46985]
725 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
726 - [Moved `Duration` to libcore.][46666]
730 - [`Location::column`]
733 The following functions can now be used in a constant expression.
734 eg. `static MINUTE: Duration = Duration::from_secs(60);`
735 - [`Duration::new`][47300]
736 - [`Duration::from_secs`][47300]
737 - [`Duration::from_millis`][47300]
741 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
742 - [`cargo new` now defaults to creating a binary crate, instead of a
743 library crate.][cargo/5029]
747 - [Rust by example is now shipped with new releases][46196]
751 - [Deprecated `net::lookup_host`.][47510]
752 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
753 - The borrow checker was sometimes incorrectly permitting overlapping borrows
754 around indexing operations (see [#47349][47349]). This has been fixed (which also
755 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
756 - [Removed deprecated unstable attribute `#[simd]`.][47251]
758 [33903]: https://github.com/rust-lang/rust/pull/33903
759 [47947]: https://github.com/rust-lang/rust/pull/47947
760 [47948]: https://github.com/rust-lang/rust/pull/47948
761 [47760]: https://github.com/rust-lang/rust/pull/47760
762 [47790]: https://github.com/rust-lang/rust/pull/47790
763 [47828]: https://github.com/rust-lang/rust/pull/47828
764 [47398]: https://github.com/rust-lang/rust/pull/47398
765 [47510]: https://github.com/rust-lang/rust/pull/47510
766 [47521]: https://github.com/rust-lang/rust/pull/47521
767 [47204]: https://github.com/rust-lang/rust/pull/47204
768 [47251]: https://github.com/rust-lang/rust/pull/47251
769 [47268]: https://github.com/rust-lang/rust/pull/47268
770 [47282]: https://github.com/rust-lang/rust/pull/47282
771 [47300]: https://github.com/rust-lang/rust/pull/47300
772 [47349]: https://github.com/rust-lang/rust/pull/47349
773 [46931]: https://github.com/rust-lang/rust/pull/46931
774 [46985]: https://github.com/rust-lang/rust/pull/46985
775 [47006]: https://github.com/rust-lang/rust/pull/47006
776 [46830]: https://github.com/rust-lang/rust/pull/46830
777 [46095]: https://github.com/rust-lang/rust/pull/46095
778 [46666]: https://github.com/rust-lang/rust/pull/46666
779 [46196]: https://github.com/rust-lang/rust/pull/46196
780 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
781 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
782 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
783 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
784 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
787 Version 1.24.1 (2018-03-01)
788 ==========================
790 - [Do not abort when unwinding through FFI][48251]
791 - [Emit UTF-16 files for linker arguments on Windows][48318]
792 - [Make the error index generator work again][48308]
793 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
795 [48251]: https://github.com/rust-lang/rust/issues/48251
796 [48308]: https://github.com/rust-lang/rust/issues/48308
797 [48318]: https://github.com/rust-lang/rust/issues/48318
798 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
801 Version 1.24.0 (2018-02-15)
802 ==========================
806 - [External `sysv64` ffi is now available.][46528]
807 eg. `extern "sysv64" fn foo () {}`
811 - [rustc now uses 16 codegen units by default for release builds.][46910]
812 For the fastest builds, utilize `codegen-units=1`.
813 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
814 - [Add `aarch64-unknown-openbsd` support][46760]
818 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
819 improvement in performance in the majority of cases.
820 - [`OsStr`'s `Debug` implementation is now lossless and consistent
821 with Windows.][46798]
822 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
823 - [impl `From<bool>` for `AtomicBool`][46293]
824 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
825 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
826 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
827 - [float::from_bits now just uses transmute.][46012] This provides
828 some optimisations from LLVM.
829 - [Copied `AsciiExt` methods onto `char`][46077]
830 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
831 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
832 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
833 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
837 - [`RefCell::replace`]
839 - [`atomic::spin_loop_hint`]
841 The following functions can now be used in a constant expression.
842 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
844 - [`AtomicBool::new`][46287]
845 - [`AtomicUsize::new`][46287]
846 - [`AtomicIsize::new`][46287]
847 - [`AtomicPtr::new`][46287]
848 - [`Cell::new`][46287]
849 - [`{integer}::min_value`][46287]
850 - [`{integer}::max_value`][46287]
851 - [`mem::size_of`][46287]
852 - [`mem::align_of`][46287]
853 - [`ptr::null`][46287]
854 - [`ptr::null_mut`][46287]
855 - [`RefCell::new`][46287]
856 - [`UnsafeCell::new`][46287]
860 - [Added a `workspace.default-members` config that
861 overrides implied `--all` in virtual workspaces.][cargo/4743]
862 - [Enable incremental by default on development builds.][cargo/4817] Also added
863 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
864 per-project or global basis respectively.
871 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
872 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
873 in accordance with IETF RFC 4291 §2.2.
874 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
875 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
876 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
877 - [Leading zeros in tuple struct members is now an error][47084]
878 - [`column!()` macro is one-based instead of zero-based][46977]
879 - [`fmt::Arguments` can no longer be shared across threads][45198]
880 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
881 - [Cargo sets a different working directory for the compiler][cargo/4788]
883 [44884]: https://github.com/rust-lang/rust/pull/44884
884 [45198]: https://github.com/rust-lang/rust/pull/45198
885 [45506]: https://github.com/rust-lang/rust/pull/45506
886 [45904]: https://github.com/rust-lang/rust/pull/45904
887 [45990]: https://github.com/rust-lang/rust/pull/45990
888 [46012]: https://github.com/rust-lang/rust/pull/46012
889 [46077]: https://github.com/rust-lang/rust/pull/46077
890 [46094]: https://github.com/rust-lang/rust/pull/46094
891 [46284]: https://github.com/rust-lang/rust/pull/46284
892 [46287]: https://github.com/rust-lang/rust/pull/46287
893 [46293]: https://github.com/rust-lang/rust/pull/46293
894 [46528]: https://github.com/rust-lang/rust/pull/46528
895 [46671]: https://github.com/rust-lang/rust/pull/46671
896 [46713]: https://github.com/rust-lang/rust/pull/46713
897 [46735]: https://github.com/rust-lang/rust/pull/46735
898 [46749]: https://github.com/rust-lang/rust/pull/46749
899 [46760]: https://github.com/rust-lang/rust/pull/46760
900 [46798]: https://github.com/rust-lang/rust/pull/46798
901 [46828]: https://github.com/rust-lang/rust/pull/46828
902 [46831]: https://github.com/rust-lang/rust/pull/46831
903 [46833]: https://github.com/rust-lang/rust/pull/46833
904 [46910]: https://github.com/rust-lang/rust/pull/46910
905 [46977]: https://github.com/rust-lang/rust/pull/46977
906 [47018]: https://github.com/rust-lang/rust/pull/47018
907 [47080]: https://github.com/rust-lang/rust/pull/47080
908 [47084]: https://github.com/rust-lang/rust/pull/47084
909 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
910 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
911 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
912 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
913 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
914 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
917 Version 1.23.0 (2018-01-04)
918 ==========================
922 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
923 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
924 Which should fix some confusing errors in some operations.
928 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
929 undefined behaviour.][45920]
930 - [rustc now suggests renaming import if names clash.][45660]
931 - [Display errors/warnings correctly when there are zero-width or
932 wide characters.][45711]
933 - [rustc now avoids unnecessary copies of arguments that are
934 simple bindings][45380] This should improve memory usage on average by 5-10%.
935 - [Updated musl used to build musl rustc to 1.1.17][45393]
939 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
940 - [Implement Hash for raw pointers to unsized types][45483]
941 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
942 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
943 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
944 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
945 and `<*mut T>::as_mut`][44932]
946 - [Optimized `Thread::{park, unpark}` implementation][45524]
947 - [Improved `SliceExt::binary_search` performance.][45333]
948 - [impl `FromIterator<()>` for `()`][45379]
949 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
957 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
958 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
959 - [Added unit test checking to `cargo check`][cargo/4592]
960 - [Cargo now lets you install a specific version
961 using `cargo install --version`][cargo/4637]
965 - [Releases now ship with the Cargo book documentation.][45692]
966 - [rustdoc now prints rendering warnings on every run.][45324]
970 - [Changes have been made to type equality to make it more correct,
971 in rare cases this could break some code.][45853] [Tracking issue for
972 further information][45852]
973 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
974 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
975 Android 9, the minimum supported version is Android 14.
976 - [Bumped the minimum LLVM to 3.9][45326]
978 [44042]: https://github.com/rust-lang/rust/pull/44042
979 [44932]: https://github.com/rust-lang/rust/pull/44932
980 [45267]: https://github.com/rust-lang/rust/pull/45267
981 [45324]: https://github.com/rust-lang/rust/pull/45324
982 [45326]: https://github.com/rust-lang/rust/pull/45326
983 [45333]: https://github.com/rust-lang/rust/pull/45333
984 [45379]: https://github.com/rust-lang/rust/pull/45379
985 [45380]: https://github.com/rust-lang/rust/pull/45380
986 [45393]: https://github.com/rust-lang/rust/pull/45393
987 [45435]: https://github.com/rust-lang/rust/pull/45435
988 [45483]: https://github.com/rust-lang/rust/pull/45483
989 [45524]: https://github.com/rust-lang/rust/pull/45524
990 [45571]: https://github.com/rust-lang/rust/pull/45571
991 [45580]: https://github.com/rust-lang/rust/pull/45580
992 [45610]: https://github.com/rust-lang/rust/pull/45610
993 [45660]: https://github.com/rust-lang/rust/pull/45660
994 [45692]: https://github.com/rust-lang/rust/pull/45692
995 [45711]: https://github.com/rust-lang/rust/pull/45711
996 [45772]: https://github.com/rust-lang/rust/pull/45772
997 [45852]: https://github.com/rust-lang/rust/issues/45852
998 [45853]: https://github.com/rust-lang/rust/pull/45853
999 [45887]: https://github.com/rust-lang/rust/pull/45887
1000 [45920]: https://github.com/rust-lang/rust/pull/45920
1001 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
1002 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
1003 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
1006 Version 1.22.1 (2017-11-22)
1007 ==========================
1009 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
1011 [46183]: https://github.com/rust-lang/rust/pull/46183
1013 Version 1.22.0 (2017-11-22)
1014 ==========================
1018 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
1019 - [Now accepts underscores in unicode escapes][43716]
1020 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
1021 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
1025 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
1026 - [rustc will no longer inline in codegen units when compiling for debug][45075]
1027 This should decrease compile times for debug builds.
1028 - [strict memory alignment now enabled on ARMv6][45094]
1029 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
1033 - [Allow atomic operations up to 32 bits
1034 on `armv5te_unknown_linux_gnueabi`][44978]
1035 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
1036 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
1037 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
1038 - [Properly detect overflow in `Instant += Duration`.][44220]
1039 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
1040 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
1041 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
1048 - [Cargo will now build multi file examples in subdirectories of the `examples`
1049 folder that have a `main.rs` file.][cargo/4496]
1050 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
1051 the old format will continue to work and can be updated with `cargo update`.
1052 - [Now supports vendoring git repositories][cargo/3992]
1056 - [`libbacktrace` is now available on Apple platforms.][44251]
1057 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
1058 This now lets you specify that a given code example will fail to compile.
1062 - [The minimum Android version that rustc can build for has been bumped
1063 to `4.0` from `2.3`][45656]
1064 - [Allowing `T op= &T` for numeric types has broken some type
1065 inference cases][45480]
1068 [42526]: https://github.com/rust-lang/rust/pull/42526
1069 [43017]: https://github.com/rust-lang/rust/pull/43017
1070 [43716]: https://github.com/rust-lang/rust/pull/43716
1071 [43949]: https://github.com/rust-lang/rust/pull/43949
1072 [44015]: https://github.com/rust-lang/rust/pull/44015
1073 [44220]: https://github.com/rust-lang/rust/pull/44220
1074 [44251]: https://github.com/rust-lang/rust/pull/44251
1075 [44287]: https://github.com/rust-lang/rust/pull/44287
1076 [44303]: https://github.com/rust-lang/rust/pull/44303
1077 [44456]: https://github.com/rust-lang/rust/pull/44456
1078 [44466]: https://github.com/rust-lang/rust/pull/44466
1079 [44895]: https://github.com/rust-lang/rust/pull/44895
1080 [44966]: https://github.com/rust-lang/rust/pull/44966
1081 [44978]: https://github.com/rust-lang/rust/pull/44978
1082 [45041]: https://github.com/rust-lang/rust/pull/45041
1083 [45064]: https://github.com/rust-lang/rust/pull/45064
1084 [45075]: https://github.com/rust-lang/rust/pull/45075
1085 [45094]: https://github.com/rust-lang/rust/pull/45094
1086 [45095]: https://github.com/rust-lang/rust/pull/45095
1087 [45480]: https://github.com/rust-lang/rust/issues/45480
1088 [45656]: https://github.com/rust-lang/rust/pull/45656
1089 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
1090 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
1091 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
1098 Version 1.21.0 (2017-10-12)
1099 ==========================
1103 - [You can now use static references for literals.][43838]
1107 let x: &'static u32 = &0;
1110 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
1113 my_macro!(Vec<i32>::new); // Always worked
1114 my_macro!(Vec::<i32>::new); // Now works
1119 - [Upgraded jemalloc to 4.5.0][43911]
1120 - [Enabled unwinding panics on Redox][43917]
1121 - [Now runs LLVM in parallel during translation phase.][43506]
1122 This should reduce peak memory usage.
1126 - [Generate builtin impls for `Clone` for all arrays and tuples that
1127 are `T: Clone`][43690]
1128 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
1129 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
1130 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
1135 [`std::mem::discriminant`]
1139 - [You can now call `cargo install` with multiple package names][cargo/4216]
1140 - [Cargo commands inside a virtual workspace will now implicitly
1141 pass `--all`][cargo/4335]
1142 - [Added a `[patch]` section to `Cargo.toml` to handle
1143 prepublication dependencies][cargo/4123] [RFC 1969]
1144 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
1145 like patterns][cargo/4270]
1146 - [Added the `--all-targets` option][cargo/4400]
1147 - [Using required dependencies as a feature is now deprecated and emits
1148 a warning][cargo/4364]
1153 - [Cargo docs are moving][43916]
1154 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
1155 - [The rustdoc book is now available][43863]
1156 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
1157 - [Added a preview of RLS has been made available through rustup][44204]
1158 Install with `rustup component add rls-preview`
1159 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
1160 Previously only showed `std::os::unix`.
1164 - [Changes in method matching against higher-ranked types][43880] This may cause
1165 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
1166 - [rustc's JSON error output's byte position start at top of file.][42973]
1167 Was previously relative to the rustc's internal `CodeMap` struct which
1168 required the unstable library `libsyntax` to correctly use.
1169 - [`unused_results` lint no longer ignores booleans][43728]
1171 [42565]: https://github.com/rust-lang/rust/pull/42565
1172 [42973]: https://github.com/rust-lang/rust/pull/42973
1173 [43348]: https://github.com/rust-lang/rust/pull/43348
1174 [43459]: https://github.com/rust-lang/rust/pull/43459
1175 [43506]: https://github.com/rust-lang/rust/pull/43506
1176 [43540]: https://github.com/rust-lang/rust/pull/43540
1177 [43690]: https://github.com/rust-lang/rust/pull/43690
1178 [43728]: https://github.com/rust-lang/rust/pull/43728
1179 [43838]: https://github.com/rust-lang/rust/pull/43838
1180 [43863]: https://github.com/rust-lang/rust/pull/43863
1181 [43880]: https://github.com/rust-lang/rust/pull/43880
1182 [43911]: https://github.com/rust-lang/rust/pull/43911
1183 [43916]: https://github.com/rust-lang/rust/pull/43916
1184 [43917]: https://github.com/rust-lang/rust/pull/43917
1185 [44204]: https://github.com/rust-lang/rust/pull/44204
1186 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
1187 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
1188 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1189 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
1190 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
1191 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
1192 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
1193 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
1194 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
1196 Version 1.20.0 (2017-08-31)
1197 ===========================
1201 - [Associated constants are now stabilised.][42809]
1202 - [A lot of macro bugs are now fixed.][42913]
1207 - [Struct fields are now properly coerced to the expected field type.][42807]
1208 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
1209 `wasm32-experimental-emscripten` target.
1210 - [Changed some of the error messages to be more helpful.][42033]
1211 - [Add support for RELRO(RELocation Read-Only) for platforms that support
1213 - [rustc now reports the total number of errors on compilation failure][43015]
1214 previously this was only the number of errors in the pass that failed.
1215 - [Expansion in rustc has been sped up 29x.][42533]
1216 - [added `msp430-none-elf` target.][43099]
1217 - [rustc will now suggest one-argument enum variant to fix type mismatch when
1219 - [Fixes backtraces on Redox][43228]
1220 - [rustc now identifies different versions of same crate when absolute paths of
1221 different types match in an error message.][42826]
1227 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
1228 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
1230 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
1231 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
1232 - [Impl `Clone` for `DefaultHasher`.][42799]
1233 - [Impl `Sync` for `SyncSender`.][42397]
1234 - [Impl `FromStr` for `char`][42271]
1235 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
1237 - [allow messages in the `unimplemented!()` macro.][42155]
1238 ie. `unimplemented!("Waiting for 1.21 to be stable")`
1239 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
1240 - [Upgrade to Unicode 10.0.0][42999]
1241 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
1242 - [Skip the main thread's manual stack guard on Linux][43072]
1243 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
1244 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
1246 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
1251 - [`CStr::into_c_string`]
1252 - [`CString::as_c_str`]
1253 - [`CString::into_boxed_c_str`]
1254 - [`Chain::get_mut`]
1255 - [`Chain::get_ref`]
1256 - [`Chain::into_inner`]
1257 - [`Option::get_or_insert_with`]
1258 - [`Option::get_or_insert`]
1259 - [`OsStr::into_os_string`]
1260 - [`OsString::into_boxed_os_str`]
1263 - [`Utf8Error::error_len`]
1264 - [`char::EscapeDebug`]
1265 - [`char::escape_debug`]
1266 - [`compile_error!`]
1267 - [`f32::from_bits`]
1269 - [`f64::from_bits`]
1271 - [`mem::ManuallyDrop`]
1272 - [`slice::sort_unstable_by_key`]
1273 - [`slice::sort_unstable_by`]
1274 - [`slice::sort_unstable`]
1275 - [`str::from_boxed_utf8_unchecked`]
1276 - [`str::as_bytes_mut`]
1277 - [`str::as_bytes_mut`]
1278 - [`str::from_utf8_mut`]
1279 - [`str::from_utf8_unchecked_mut`]
1281 - [`str::get_unchecked_mut`]
1282 - [`str::get_unchecked`]
1284 - [`str::into_boxed_bytes`]
1289 - [Cargo API token location moved from `~/.cargo/config` to
1290 `~/.cargo/credentials`.][cargo/3978]
1291 - [Cargo will now build `main.rs` binaries that are in sub-directories of
1292 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
1293 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
1294 - [You can now specify version of a binary when installed through
1295 `cargo install` using `--vers`.][cargo/4229]
1296 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
1297 failure.][cargo/4248]
1298 - [Changed the convention around which file is the crate root.][cargo/4259]
1299 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
1300 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
1305 - [Functions with `'static` in their return types will now not be as usable as
1306 if they were using lifetime parameters instead.][42417]
1307 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
1308 takes the sign of NaN into account where previously didn't.][42430]
1310 [42033]: https://github.com/rust-lang/rust/pull/42033
1311 [42155]: https://github.com/rust-lang/rust/pull/42155
1312 [42271]: https://github.com/rust-lang/rust/pull/42271
1313 [42397]: https://github.com/rust-lang/rust/pull/42397
1314 [42417]: https://github.com/rust-lang/rust/pull/42417
1315 [42430]: https://github.com/rust-lang/rust/pull/42430
1316 [42431]: https://github.com/rust-lang/rust/pull/42431
1317 [42533]: https://github.com/rust-lang/rust/pull/42533
1318 [42571]: https://github.com/rust-lang/rust/pull/42571
1319 [42613]: https://github.com/rust-lang/rust/pull/42613
1320 [42799]: https://github.com/rust-lang/rust/pull/42799
1321 [42807]: https://github.com/rust-lang/rust/pull/42807
1322 [42809]: https://github.com/rust-lang/rust/pull/42809
1323 [42822]: https://github.com/rust-lang/rust/pull/42822
1324 [42826]: https://github.com/rust-lang/rust/pull/42826
1325 [42854]: https://github.com/rust-lang/rust/pull/42854
1326 [42913]: https://github.com/rust-lang/rust/pull/42913
1327 [42999]: https://github.com/rust-lang/rust/pull/42999
1328 [43011]: https://github.com/rust-lang/rust/pull/43011
1329 [43015]: https://github.com/rust-lang/rust/pull/43015
1330 [43072]: https://github.com/rust-lang/rust/pull/43072
1331 [43077]: https://github.com/rust-lang/rust/pull/43077
1332 [43097]: https://github.com/rust-lang/rust/pull/43097
1333 [43099]: https://github.com/rust-lang/rust/pull/43099
1334 [43170]: https://github.com/rust-lang/rust/pull/43170
1335 [43178]: https://github.com/rust-lang/rust/pull/43178
1336 [43185]: https://github.com/rust-lang/rust/pull/43185
1337 [43228]: https://github.com/rust-lang/rust/pull/43228
1338 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
1339 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
1340 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
1341 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
1342 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
1343 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1344 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
1345 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
1346 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
1347 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
1348 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
1349 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
1350 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
1351 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
1352 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
1353 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
1354 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
1355 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
1356 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
1357 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
1358 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
1359 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
1360 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
1361 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
1362 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
1363 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
1364 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
1365 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
1366 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
1367 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
1368 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
1369 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
1370 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
1371 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
1372 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
1373 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
1374 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
1375 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
1376 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
1379 Version 1.19.0 (2017-07-20)
1380 ===========================
1385 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
1386 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
1387 - [Macro recursion limit increased to 1024 from 64.][41676]
1388 - [Added lint for detecting unused macros.][41907]
1389 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
1390 For example: `let x = loop { break 7; };`
1391 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
1392 contain `Copy` types and cannot have a `Drop` implementation.
1393 Example: `union Foo { bar: u8, baz: usize }`
1394 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
1395 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
1400 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
1401 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
1402 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
1403 you should use `--target armv7-linux-androideabi`.
1404 - [Fixed ICE when removing a source file between compilation sessions.][41873]
1405 - [Minor optimisation of string operations.][42037]
1406 - [Compiler error message is now `aborting due to previous error(s)` instead of
1407 `aborting due to N previous errors`][42150] This was previously inaccurate and
1408 would only count certain kinds of errors.
1409 - [The compiler now supports Visual Studio 2017][42225]
1410 - [The compiler is now built against LLVM 4.0.1 by default][42948]
1411 - [Added a lot][42264] of [new error codes][42302]
1412 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
1413 libraries with C Run-time Libraries(CRT) to be statically linked.
1414 - [Fixed various ARM codegen bugs][42740]
1419 - [`String` now implements `FromIterator<Cow<'a, str>>` and
1420 `Extend<Cow<'a, str>>`][41449]
1421 - [`Vec` now implements `From<&mut [T]>`][41530]
1422 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
1423 - [`SplitWhitespace` now implements `Clone`][41659]
1424 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
1426 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
1427 macros, but for printing to stderr.
1432 - [`OsString::shrink_to_fit`]
1435 - [`thread::ThreadId`]
1440 - [Build scripts can now add environment variables to the environment
1441 the crate is being compiled in.
1442 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
1443 - [Subcommands now replace the current process rather than spawning a new
1444 child process][cargo/3970]
1445 - [Workspace members can now accept glob file patterns][cargo/3979]
1446 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
1447 the members in a given workspace.][cargo/3988]
1448 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
1449 - [Target directory path is now in the cargo metadata][cargo/4022]
1450 - [Cargo no longer checks out a local working directory for the
1451 crates.io index][cargo/4026] This should provide smaller file size for the
1452 registry, and improve cloning times, especially on Windows machines.
1453 - [Added an `--exclude` option for excluding certain packages when using the
1454 `--all` option][cargo/4031]
1455 - [Cargo will now automatically retry when receiving a 5xx error
1456 from crates.io][cargo/4032]
1457 - [The `--features` option now accepts multiple comma or space
1458 delimited values.][cargo/4084]
1459 - [Added support for custom target specific runners][cargo/3954]
1464 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
1466 - [Rust will now release XZ compressed packages][rust-installer/57]
1467 - [rustup will now prefer to download rust packages with
1468 XZ compression][rustup/1100] over GZip packages.
1469 - [Added the ability to escape `#` in rust documentation][41785] By adding
1470 additional `#`'s ie. `##` is now `#`
1475 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
1476 - [`-Z` flags are now no longer allowed to be used on the stable
1477 compiler.][41751] This has been a warning for a year previous to this.
1478 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
1479 longer works][42844]. Users should migrate to the built-in `check`
1480 command, which has been available since 1.16.
1481 - [Ending a float literal with `._` is now a hard error.
1482 Example: `42._` .][41946]
1483 - [Any use of a private `extern crate` outside of its module is now a
1484 hard error.][36886] This was previously a warning.
1485 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
1486 relative while the `::` prefix makes a path absolute, but was ignored and the
1487 path was relative regardless.
1488 - [Floating point constants in match patterns is now a hard error][36890]
1489 This was previously a warning.
1490 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
1491 match patterns is now a hard error][36891] This was previously a warning.
1492 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
1494 - [From the pound escape, lines consisting of multiple `#`s are
1496 - [It is an error to re-export private enum variants][42460]. This is
1497 known to break a number of crates that depend on an older version of
1499 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
1500 to use it to find the linker, and the build will fail where it did
1501 not previously][42607]
1503 [36886]: https://github.com/rust-lang/rust/issues/36886
1504 [36888]: https://github.com/rust-lang/rust/issues/36888
1505 [36890]: https://github.com/rust-lang/rust/issues/36890
1506 [36891]: https://github.com/rust-lang/rust/issues/36891
1507 [36892]: https://github.com/rust-lang/rust/issues/36892
1508 [37406]: https://github.com/rust-lang/rust/issues/37406
1509 [39983]: https://github.com/rust-lang/rust/pull/39983
1510 [41145]: https://github.com/rust-lang/rust/pull/41145
1511 [41192]: https://github.com/rust-lang/rust/pull/41192
1512 [41258]: https://github.com/rust-lang/rust/pull/41258
1513 [41370]: https://github.com/rust-lang/rust/pull/41370
1514 [41449]: https://github.com/rust-lang/rust/pull/41449
1515 [41530]: https://github.com/rust-lang/rust/pull/41530
1516 [41624]: https://github.com/rust-lang/rust/pull/41624
1517 [41656]: https://github.com/rust-lang/rust/pull/41656
1518 [41659]: https://github.com/rust-lang/rust/pull/41659
1519 [41676]: https://github.com/rust-lang/rust/pull/41676
1520 [41751]: https://github.com/rust-lang/rust/pull/41751
1521 [41764]: https://github.com/rust-lang/rust/pull/41764
1522 [41785]: https://github.com/rust-lang/rust/pull/41785
1523 [41873]: https://github.com/rust-lang/rust/pull/41873
1524 [41907]: https://github.com/rust-lang/rust/pull/41907
1525 [41946]: https://github.com/rust-lang/rust/pull/41946
1526 [42016]: https://github.com/rust-lang/rust/pull/42016
1527 [42037]: https://github.com/rust-lang/rust/pull/42037
1528 [42068]: https://github.com/rust-lang/rust/pull/42068
1529 [42150]: https://github.com/rust-lang/rust/pull/42150
1530 [42162]: https://github.com/rust-lang/rust/pull/42162
1531 [42225]: https://github.com/rust-lang/rust/pull/42225
1532 [42264]: https://github.com/rust-lang/rust/pull/42264
1533 [42302]: https://github.com/rust-lang/rust/pull/42302
1534 [42460]: https://github.com/rust-lang/rust/issues/42460
1535 [42607]: https://github.com/rust-lang/rust/issues/42607
1536 [42740]: https://github.com/rust-lang/rust/pull/42740
1537 [42844]: https://github.com/rust-lang/rust/issues/42844
1538 [42948]: https://github.com/rust-lang/rust/pull/42948
1539 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
1540 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
1541 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
1542 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
1543 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
1544 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
1545 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
1546 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
1547 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
1548 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
1549 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
1550 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
1551 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
1552 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
1553 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
1554 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
1555 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
1556 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
1557 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
1558 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
1559 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
1560 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
1563 Version 1.18.0 (2017-06-08)
1564 ===========================
1569 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
1570 make the item visible to just that module tree. Also accepts the keyword
1571 `crate` to make something public to the whole crate but not users of the
1572 library. Example: `pub(crate) mod utils;`. [RFC 1422].
1573 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
1574 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
1575 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
1576 types like `Write + Send`, trailing `+` are now supported in trait objects,
1577 and better error reporting for trait objects starting with `?Sized`.
1578 - [0e+10 is now a valid floating point literal][40589]
1579 - [Now warns if you bind a lifetime parameter to 'static][40734]
1580 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
1581 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
1582 representation in some cases.][40377]
1587 - [rustc can now emit mir with `--emit mir`][39891]
1588 - [Improved LLVM IR for trivial functions][40367]
1589 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
1590 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
1591 opportunities found through profiling
1592 - [Improved backtrace formatting when panicking][38165]
1597 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
1598 iterator hasn't been advanced the original `Vec` is reassembled with no actual
1599 iteration or reallocation.
1600 - [Simplified HashMap Bucket interface][40561] provides performance
1601 improvements for iterating and cloning.
1602 - [Specialize Vec::from_elem to use calloc][40409]
1603 - [Fixed Race condition in fs::create_dir_all][39799]
1604 - [No longer caching stdio on Windows][40516]
1605 - [Optimized insertion sort in slice][40807] insertion sort in some cases
1606 2.50%~ faster and in one case now 12.50% faster.
1607 - [Optimized `AtomicBool::fetch_nand`][41143]
1612 - [`Child::try_wait`]
1613 - [`HashMap::retain`]
1614 - [`HashSet::retain`]
1616 - [`TcpStream::peek`]
1617 - [`UdpSocket::peek`]
1618 - [`UdpSocket::peek_from`]
1623 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
1624 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
1625 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
1626 - [Added Android build support][cargo/3885]
1627 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
1628 of a certain type, for example `cargo build --bins` will build all
1630 - [Added support for haiku][cargo/3952]
1635 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
1636 - [Added rust-windbg script for better debugging on Windows][39983]
1637 - [Rust now uses the official cross compiler for NetBSD][40612]
1638 - [rustdoc now accepts `#` at the start of files][40828]
1639 - [Fixed jemalloc support for musl][41168]
1644 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
1645 always placed after the sign if it exists and before the digits. With the `#`
1646 flag the zeroes are placed after the prefix and before the digits.
1647 - [Due to the struct field optimisation][40377], using `transmute` on structs
1648 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
1649 always been undefined behavior, but is now more likely to break in practice.
1650 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
1651 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
1652 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
1653 - [Overlapping inherent `impl`s are now a hard error][40728]
1654 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
1655 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
1656 `out.asm` and `out.ll` instead of only one of the filetypes.
1657 - [ calling a function that returns `Self` will no longer work][41805] when
1658 the size of `Self` cannot be statically determined.
1659 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
1660 this has caused a few regressions namely:
1662 - Changed the link order of local static/dynamic libraries (respecting the
1663 order on given rather than having the compiler reorder).
1664 - Changed how MinGW is linked, native code linked to dynamic libraries
1665 may require manually linking to the gcc support library (for the native
1668 [38165]: https://github.com/rust-lang/rust/pull/38165
1669 [39799]: https://github.com/rust-lang/rust/pull/39799
1670 [39891]: https://github.com/rust-lang/rust/pull/39891
1671 [39983]: https://github.com/rust-lang/rust/pull/39983
1672 [40043]: https://github.com/rust-lang/rust/pull/40043
1673 [40241]: https://github.com/rust-lang/rust/pull/40241
1674 [40338]: https://github.com/rust-lang/rust/pull/40338
1675 [40367]: https://github.com/rust-lang/rust/pull/40367
1676 [40377]: https://github.com/rust-lang/rust/pull/40377
1677 [40409]: https://github.com/rust-lang/rust/pull/40409
1678 [40516]: https://github.com/rust-lang/rust/pull/40516
1679 [40556]: https://github.com/rust-lang/rust/pull/40556
1680 [40561]: https://github.com/rust-lang/rust/pull/40561
1681 [40589]: https://github.com/rust-lang/rust/pull/40589
1682 [40612]: https://github.com/rust-lang/rust/pull/40612
1683 [40723]: https://github.com/rust-lang/rust/pull/40723
1684 [40728]: https://github.com/rust-lang/rust/pull/40728
1685 [40731]: https://github.com/rust-lang/rust/pull/40731
1686 [40734]: https://github.com/rust-lang/rust/pull/40734
1687 [40805]: https://github.com/rust-lang/rust/pull/40805
1688 [40807]: https://github.com/rust-lang/rust/pull/40807
1689 [40828]: https://github.com/rust-lang/rust/pull/40828
1690 [40870]: https://github.com/rust-lang/rust/pull/40870
1691 [41085]: https://github.com/rust-lang/rust/pull/41085
1692 [41143]: https://github.com/rust-lang/rust/pull/41143
1693 [41168]: https://github.com/rust-lang/rust/pull/41168
1694 [41270]: https://github.com/rust-lang/rust/issues/41270
1695 [41469]: https://github.com/rust-lang/rust/pull/41469
1696 [41805]: https://github.com/rust-lang/rust/issues/41805
1697 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
1698 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
1699 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
1700 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
1701 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
1702 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
1703 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
1704 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
1705 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
1706 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
1707 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
1708 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
1709 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
1710 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
1713 Version 1.17.0 (2017-04-27)
1714 ===========================
1719 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
1720 * [Fields of structs may be initialized without duplicating the field/variable
1721 names][39761]. [RFC 1682]
1722 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
1723 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1724 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
1725 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
1726 `'b`. Soundness fix.
1727 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
1728 * [Static variables may contain references to other statics][40027]
1733 * [Exit quickly on only `--emit dep-info`][40336]
1734 * [Make `-C relocation-model` more correctly determine whether the linker
1735 creates a position-independent executable][40245]
1736 * [Add `-C overflow-checks` to directly control whether integer overflow
1738 * [The rustc type checker now checks items on demand instead of in a single
1739 in-order pass][40008]. This is mostly an internal refactoring in support of
1740 future work, including incremental type checking, but also resolves [RFC
1741 1647], allowing `Self` to appear in `impl` `where` clauses.
1742 * [Optimize vtable loads][39995]
1743 * [Turn off vectorization for Emscripten targets][39990]
1744 * [Provide suggestions for unknown macros imported with `use`][39953]
1745 * [Fix ICEs in path resolution][39939]
1746 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
1747 * [Add clearer error message using `&str + &str`][39116]
1758 * [`Ordering::then`]
1759 * [`Ordering::then_with`]
1760 * [`BTreeMap::range`]
1761 * [`BTreeMap::range_mut`]
1762 * [`collections::Bound`]
1763 * [`process::abort`]
1764 * [`ptr::read_unaligned`]
1765 * [`ptr::write_unaligned`]
1766 * [`Result::expect_err`]
1769 * [`Cell::into_inner`]
1775 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
1776 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
1777 * [`String` implements `FromIterator<&char>`][40028]
1778 * `Box` [implements][40009] a number of new conversions:
1779 `From<Box<str>> for String`,
1780 `From<Box<[T]>> for Vec<T>`,
1781 `From<Box<CStr>> for CString`,
1782 `From<Box<OsStr>> for OsString`,
1783 `From<Box<Path>> for PathBuf`,
1784 `Into<Box<str>> for String`,
1785 `Into<Box<[T]>> for Vec<T>`,
1786 `Into<Box<CStr>> for CString`,
1787 `Into<Box<OsStr>> for OsString`,
1788 `Into<Box<Path>> for PathBuf`,
1789 `Default for Box<str>`,
1790 `Default for Box<CStr>`,
1791 `Default for Box<OsStr>`,
1792 `From<&CStr> for Box<CStr>`,
1793 `From<&OsStr> for Box<OsStr>`,
1794 `From<&Path> for Box<Path>`
1795 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
1796 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
1797 * [Slightly optimize `slice::sort`][39538]
1798 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
1799 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
1800 `Box<str>` implements `From<&str>`][39438]
1801 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
1802 `From<(I, u16)> where I: Into<IpAddr>`][39372]
1803 * [`format!` estimates the needed capacity before writing a string][39356]
1804 * [Support unprivileged symlink creation in Windows][38921]
1805 * [`PathBuf` implements `Default`][38764]
1806 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
1807 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
1808 and poor hash functions.
1813 * [Add `cargo check --all`][cargo/3731]
1814 * [Add an option to ignore SSL revocation checking][cargo/3699]
1815 * [Add `cargo run --package`][cargo/3691]
1816 * [Add `required_features`][cargo/3667]
1817 * [Assume `build.rs` is a build script][cargo/3664]
1818 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
1823 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
1825 * [The "Unstable Book" documents nightly-only features][ubook]
1826 * [Improve the style of the sidebar in rustdoc output][40265]
1827 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
1828 * [Fix MSP430 breakage due to `i128`][40257]
1829 * [Preliminary Solaris/SPARCv9 support][39903]
1830 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
1831 run without installing the MSVC runtime.
1832 * [`rustdoc --test` includes file names in test names][39788]
1833 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
1834 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
1835 * [Initial support for `aarch64-unknown-freebsd`][39491]
1836 * [Initial support for `i686-unknown-netbsd`][39426]
1837 * [This release no longer includes the old makefile build system][39431]. Rust
1838 is built with a custom build system, written in Rust, and with Cargo.
1839 * [Add Debug implementations for libcollection structs][39002]
1840 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
1841 * [`--test-threads=0` produces an error][38945]
1842 * [`rustup` installs documentation by default][40526]
1843 * [The Rust source includes NatVis visualizations][39843]. These can be used by
1844 WinDbg and Visual Studio to improve the debugging experience.
1849 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
1850 workaround, either use MSVC 2015 or run vcvars.bat.
1851 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1852 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
1853 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
1855 * [`format!` and `Display::to_string` panic if an underlying formatting
1856 implementation returns an error][40117]. Previously the error was silently
1857 ignored. It is incorrect for `write_fmt` to return an error when writing
1859 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
1860 crates were marked stable and could be accessed from the stable toolchain.
1861 * [Rust git source no longer includes vendored crates][39728]. Those that need
1862 to build with vendored crates should build from release tarballs.
1863 * [Fix inert attributes from `proc_macro_derives`][39572]
1864 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
1865 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
1867 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
1868 existing code generally ignores the type of dead-code unless a type-hint is
1869 provided; this can cause surprising inference interactions particularly around
1870 defaulting. The new code uniformly ignores the result type of dead-code.
1871 * [Tuple-struct constructors with private fields are no longer visible][38932]
1872 * [Lifetime parameters that do not appear in the arguments are now considered
1873 early-bound][38897], resolving a soundness bug (#[32330]). The
1874 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
1876 * [rustdoc: fix doctests with non-feature crate attributes][38161]
1877 * [Make transmuting from fn item types to pointer-sized types a hard
1880 [27787]: https://github.com/rust-lang/rust/issues/27787
1881 [32330]: https://github.com/rust-lang/rust/issues/32330
1882 [34198]: https://github.com/rust-lang/rust/pull/34198
1883 [38161]: https://github.com/rust-lang/rust/pull/38161
1884 [38368]: https://github.com/rust-lang/rust/pull/38368
1885 [38584]: https://github.com/rust-lang/rust/issues/38584
1886 [38661]: https://github.com/rust-lang/rust/pull/38661
1887 [38764]: https://github.com/rust-lang/rust/pull/38764
1888 [38864]: https://github.com/rust-lang/rust/issues/38864
1889 [38897]: https://github.com/rust-lang/rust/pull/38897
1890 [38921]: https://github.com/rust-lang/rust/pull/38921
1891 [38932]: https://github.com/rust-lang/rust/pull/38932
1892 [38945]: https://github.com/rust-lang/rust/pull/38945
1893 [38981]: https://github.com/rust-lang/rust/pull/38981
1894 [39002]: https://github.com/rust-lang/rust/pull/39002
1895 [39116]: https://github.com/rust-lang/rust/pull/39116
1896 [39193]: https://github.com/rust-lang/rust/pull/39193
1897 [39265]: https://github.com/rust-lang/rust/pull/39265
1898 [39356]: https://github.com/rust-lang/rust/pull/39356
1899 [39372]: https://github.com/rust-lang/rust/pull/39372
1900 [39426]: https://github.com/rust-lang/rust/pull/39426
1901 [39431]: https://github.com/rust-lang/rust/pull/39431
1902 [39438]: https://github.com/rust-lang/rust/pull/39438
1903 [39440]: https://github.com/rust-lang/rust/pull/39440
1904 [39485]: https://github.com/rust-lang/rust/pull/39485
1905 [39491]: https://github.com/rust-lang/rust/pull/39491
1906 [39518]: https://github.com/rust-lang/rust/pull/39518
1907 [39538]: https://github.com/rust-lang/rust/pull/39538
1908 [39572]: https://github.com/rust-lang/rust/pull/39572
1909 [39633]: https://github.com/rust-lang/rust/pull/39633
1910 [39642]: https://github.com/rust-lang/rust/pull/39642
1911 [39728]: https://github.com/rust-lang/rust/pull/39728
1912 [39761]: https://github.com/rust-lang/rust/pull/39761
1913 [39788]: https://github.com/rust-lang/rust/pull/39788
1914 [39793]: https://github.com/rust-lang/rust/pull/39793
1915 [39837]: https://github.com/rust-lang/rust/pull/39837
1916 [39843]: https://github.com/rust-lang/rust/pull/39843
1917 [39851]: https://github.com/rust-lang/rust/pull/39851
1918 [39903]: https://github.com/rust-lang/rust/pull/39903
1919 [39939]: https://github.com/rust-lang/rust/pull/39939
1920 [39953]: https://github.com/rust-lang/rust/pull/39953
1921 [39960]: https://github.com/rust-lang/rust/pull/39960
1922 [39990]: https://github.com/rust-lang/rust/pull/39990
1923 [39995]: https://github.com/rust-lang/rust/pull/39995
1924 [40008]: https://github.com/rust-lang/rust/pull/40008
1925 [40009]: https://github.com/rust-lang/rust/pull/40009
1926 [40027]: https://github.com/rust-lang/rust/pull/40027
1927 [40028]: https://github.com/rust-lang/rust/pull/40028
1928 [40037]: https://github.com/rust-lang/rust/pull/40037
1929 [40117]: https://github.com/rust-lang/rust/pull/40117
1930 [40166]: https://github.com/rust-lang/rust/pull/40166
1931 [40245]: https://github.com/rust-lang/rust/pull/40245
1932 [40257]: https://github.com/rust-lang/rust/pull/40257
1933 [40261]: https://github.com/rust-lang/rust/pull/40261
1934 [40265]: https://github.com/rust-lang/rust/pull/40265
1935 [40319]: https://github.com/rust-lang/rust/pull/40319
1936 [40336]: https://github.com/rust-lang/rust/pull/40336
1937 [40526]: https://github.com/rust-lang/rust/pull/40526
1938 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1939 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
1940 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
1941 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
1942 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
1943 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
1944 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
1945 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
1946 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
1947 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
1948 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
1949 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
1950 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
1951 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
1952 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
1953 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
1954 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
1955 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
1956 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
1957 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
1958 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
1959 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
1960 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
1961 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
1962 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
1963 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
1964 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
1965 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
1966 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
1967 [mdbook]: https://crates.io/crates/mdbook
1968 [ubook]: https://doc.rust-lang.org/unstable-book/
1971 Version 1.16.0 (2017-03-16)
1972 ===========================
1977 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1978 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1979 match patterns][38069]
1980 * [Clean up semantics of `self` in an import list][38313]
1981 * [`Self` may appear in `impl` headers][38920]
1982 * [`Self` may appear in struct expressions][39282]
1987 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
1988 a `.rmeta` file containing only crate metadata][38571]. This can be
1989 used by tools like the Rust Language Service to perform
1990 metadata-only builds.
1991 * [Levenshtein based typo suggestions now work in most places, while
1992 previously they worked only for fields and sometimes for local
1993 variables][38927]. Together with the overhaul of "no
1994 resolution"/"unexpected resolution" errors (#[38154]) they result in
1995 large and systematic improvement in resolution diagnostics.
1996 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
1998 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
1999 * [`rustc` no longer attempts to provide "consider using an explicit
2000 lifetime" suggestions][37057]. They were inaccurate.
2005 * [`VecDeque::truncate`]
2006 * [`VecDeque::resize`]
2007 * [`String::insert_str`]
2008 * [`Duration::checked_add`]
2009 * [`Duration::checked_sub`]
2010 * [`Duration::checked_div`]
2011 * [`Duration::checked_mul`]
2014 * [`SocketAddr::is_ipv4`]
2015 * [`SocketAddr::is_ipv6`]
2016 * [`IpAddr::is_ipv4`]
2017 * [`IpAddr::is_ipv6`]
2019 * [`Vec::dedup_by_key`]
2020 * [`Result::unwrap_or_default`]
2021 * [`<*const T>::wrapping_offset`]
2022 * [`<*mut T>::wrapping_offset`]
2023 * `CommandExt::creation_flags`
2024 * [`File::set_permissions`]
2025 * [`String::split_off`]
2030 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
2031 their argument by `Borrow` parameter][37761]
2032 * [All public types in std implement `Debug`][38006]
2033 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
2034 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
2035 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
2037 * [std: Fix partial writes in `LineWriter`][38062]
2038 * [std: Clamp max read/write sizes on Unix][38062]
2039 * [Use more specific panic message for `&str` slicing errors][38066]
2040 * [`TcpListener::set_only_v6` is deprecated][38304]. This
2041 functionality cannot be achieved in std currently.
2042 * [`writeln!`, like `println!`, now accepts a form with no string
2043 or formatting arguments, to just print a newline][38469]
2044 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
2045 * [Reduce the size of static data in `std_unicode::tables`][38781]
2046 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
2047 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
2049 * [`Duration` implements `Sum`][38712]
2050 * [`String` implements `ToSocketAddrs`][39048]
2055 * [The `cargo check` command does a type check of a project without
2056 building it][cargo/3296]
2057 * [crates.io will display CI badges from Travis and AppVeyor, if
2058 specified in Cargo.toml][cargo/3546]
2059 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
2060 * [Compilation profiles accept integer values for `debug`, in addition
2061 to `true` and `false`. These are passed to `rustc` as the value to
2062 `-C debuginfo`][cargo/3534]
2063 * [Implement `cargo --version --verbose`][cargo/3604]
2064 * [All builds now output 'dep-info' build dependencies compatible with
2065 make and ninja][cargo/3557]
2066 * [Build all workspace members with `build --all`][cargo/3511]
2067 * [Document all workspace members with `doc --all`][cargo/3515]
2068 * [Path deps outside workspace are not members][cargo/3443]
2073 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
2074 the path to the Rust implementation][38589]
2075 * [The `armv7-linux-androideabi` target no longer enables NEON
2076 extensions, per Google's ABI guide][38413]
2077 * [The stock standard library can be compiled for Redox OS][38401]
2078 * [Rust has initial SPARC support][38726]. Tier 3. No builds
2080 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
2082 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
2087 * [Uninhabitable enums (those without any variants) no longer permit wildcard
2088 match patterns][38069]
2089 * In this release, references to uninhabited types can not be
2090 pattern-matched. This was accidentally allowed in 1.15.
2091 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
2092 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
2094 * [Clean up semantics of `self` in an import list][38313]
2095 * Reimplemented lifetime elision. This change was almost entirely compatible
2096 with existing code, but it did close a number of small bugs and loopholes,
2097 as well as being more accepting in some other [cases][41105].
2099 [37057]: https://github.com/rust-lang/rust/pull/37057
2100 [37761]: https://github.com/rust-lang/rust/pull/37761
2101 [38006]: https://github.com/rust-lang/rust/pull/38006
2102 [38051]: https://github.com/rust-lang/rust/pull/38051
2103 [38062]: https://github.com/rust-lang/rust/pull/38062
2104 [38062]: https://github.com/rust-lang/rust/pull/38622
2105 [38066]: https://github.com/rust-lang/rust/pull/38066
2106 [38069]: https://github.com/rust-lang/rust/pull/38069
2107 [38131]: https://github.com/rust-lang/rust/pull/38131
2108 [38154]: https://github.com/rust-lang/rust/pull/38154
2109 [38274]: https://github.com/rust-lang/rust/pull/38274
2110 [38304]: https://github.com/rust-lang/rust/pull/38304
2111 [38313]: https://github.com/rust-lang/rust/pull/38313
2112 [38314]: https://github.com/rust-lang/rust/pull/38314
2113 [38327]: https://github.com/rust-lang/rust/pull/38327
2114 [38401]: https://github.com/rust-lang/rust/pull/38401
2115 [38413]: https://github.com/rust-lang/rust/pull/38413
2116 [38469]: https://github.com/rust-lang/rust/pull/38469
2117 [38559]: https://github.com/rust-lang/rust/pull/38559
2118 [38571]: https://github.com/rust-lang/rust/pull/38571
2119 [38580]: https://github.com/rust-lang/rust/pull/38580
2120 [38589]: https://github.com/rust-lang/rust/pull/38589
2121 [38670]: https://github.com/rust-lang/rust/pull/38670
2122 [38712]: https://github.com/rust-lang/rust/pull/38712
2123 [38726]: https://github.com/rust-lang/rust/pull/38726
2124 [38781]: https://github.com/rust-lang/rust/pull/38781
2125 [38798]: https://github.com/rust-lang/rust/pull/38798
2126 [38909]: https://github.com/rust-lang/rust/pull/38909
2127 [38920]: https://github.com/rust-lang/rust/pull/38920
2128 [38927]: https://github.com/rust-lang/rust/pull/38927
2129 [39048]: https://github.com/rust-lang/rust/pull/39048
2130 [39282]: https://github.com/rust-lang/rust/pull/39282
2131 [39379]: https://github.com/rust-lang/rust/pull/39379
2132 [41105]: https://github.com/rust-lang/rust/issues/41105
2133 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2134 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2135 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
2136 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
2137 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
2138 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
2139 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
2140 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
2141 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
2142 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
2143 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
2144 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
2145 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
2146 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
2147 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
2148 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
2149 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
2150 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
2151 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
2152 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
2153 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
2154 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
2155 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
2156 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
2157 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
2158 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
2159 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
2160 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
2161 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
2162 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
2165 Version 1.15.1 (2017-02-09)
2166 ===========================
2168 * [Fix IntoIter::as_mut_slice's signature][39466]
2169 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
2171 [39466]: https://github.com/rust-lang/rust/pull/39466
2172 [39523]: https://github.com/rust-lang/rust/pull/39523
2175 Version 1.15.0 (2017-02-02)
2176 ===========================
2181 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
2182 stable. This allows popular code-generating crates like Serde and Diesel to
2183 work ergonomically. [RFC 1681].
2184 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
2185 with curly braces][36868]. Part of [RFC 1506].
2186 * [A number of minor changes to name resolution have been activated][37127].
2187 They add up to more consistent semantics, allowing for future evolution of
2188 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2189 details of what is different. The breaking changes here have been transitioned
2190 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2191 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
2193 * [`?Sized` can be used in `where` clauses][37791]
2194 * [There is now a limit on the size of monomorphized types and it can be
2195 modified with the `#![type_size_limit]` crate attribute, similarly to
2196 the `#![recursion_limit]` attribute][37789]
2201 * [On Windows, the compiler will apply dllimport attributes when linking to
2202 extern functions][37973]. Additional attributes and flags can control which
2203 library kind is linked and its name. [RFC 1717].
2204 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2205 * [The `--test` flag works with procedural macro crates][38107]
2206 * [Fix `extern "aapcs" fn` ABI][37814]
2207 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
2208 * [The `format!` expander recognizes incorrect `printf` and shell-style
2209 formatting directives and suggests the correct format][37613].
2210 * [Only report one error for all unused imports in an import list][37456]
2212 Compiler Performance
2213 --------------------
2215 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
2216 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
2217 * [Don't clone in `UnificationTable::probe`][37848]
2218 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
2219 * [Use small vectors in type walker][37760]
2220 * [Macro expansion performance was improved][37701]
2221 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
2222 * [Replace FNV with a faster hash function][37229]
2227 * [`std::iter::Iterator::min_by`]
2228 * [`std::iter::Iterator::max_by`]
2229 * [`std::os::*::fs::FileExt`]
2230 * [`std::sync::atomic::Atomic*::get_mut`]
2231 * [`std::sync::atomic::Atomic*::into_inner`]
2232 * [`std::vec::IntoIter::as_slice`]
2233 * [`std::vec::IntoIter::as_mut_slice`]
2234 * [`std::sync::mpsc::Receiver::try_iter`]
2235 * [`std::os::unix::process::CommandExt::before_exec`]
2236 * [`std::rc::Rc::strong_count`]
2237 * [`std::rc::Rc::weak_count`]
2238 * [`std::sync::Arc::strong_count`]
2239 * [`std::sync::Arc::weak_count`]
2240 * [`std::char::encode_utf8`]
2241 * [`std::char::encode_utf16`]
2242 * [`std::cell::Ref::clone`]
2243 * [`std::io::Take::into_inner`]
2248 * [The standard sorting algorithm has been rewritten for dramatic performance
2249 improvements][38192]. It is a hybrid merge sort, drawing influences from
2250 Timsort. Previously it was a naive merge sort.
2251 * [`Iterator::nth` no longer has a `Sized` bound][38134]
2252 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
2254 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
2255 and `char_indices().last()`][37882]
2256 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
2257 * [Chinese characters display correctly in `fmt::Debug`][37855]
2258 * [Derive `Default` for `Duration`][37699]
2259 * [Support creation of anonymous pipes on WinXP/2k][37677]
2260 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
2261 * [Don't pass overlapped handles to processes][38835]
2266 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2267 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2268 should instead check the variable at runtime with `std::env`. That the value
2269 was set at build time was a bug, and incorrect when cross-compiling. This
2270 change is known to cause breakage.
2271 * [Add `--all` flag to `cargo test`][cargo/3221]
2272 * [Compile statically against the MSVC CRT][cargo/3363]
2273 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
2274 * [Link OpenSSL statically on OSX][cargo/3311]
2275 * [Apply new fingerprinting to build dir outputs][cargo/3310]
2276 * [Test for bad path overrides with summaries][cargo/3336]
2277 * [Require `cargo install --vers` to take a semver version][cargo/3338]
2278 * [Fix retrying crate downloads for network errors][cargo/3348]
2279 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
2280 * [Emit more info on --message-format=json][cargo/3319]
2281 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
2282 * [Don't ignore errors in workspace manifest][cargo/3409]
2283 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
2288 * [Test runners (binaries built with `--test`) now support a `--list` argument
2289 that lists the tests it contains][38185]
2290 * [Test runners now support a `--exact` argument that makes the test filter
2291 match exactly, instead of matching only a substring of the test name][38181]
2292 * [rustdoc supports a `--playground-url` flag][37763]
2293 * [rustdoc provides more details about `#[should_panic]` errors][37749]
2298 * [The Rust build system is now written in Rust][37817]. The Makefiles may
2299 continue to be used in this release by passing `--disable-rustbuild` to the
2300 configure script, but they will be deleted soon. Note that the new build
2301 system uses a different on-disk layout that will likely affect any scripts
2303 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
2305 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
2306 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
2312 * [A number of minor changes to name resolution have been activated][37127].
2313 They add up to more consistent semantics, allowing for future evolution of
2314 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2315 details of what is different. The breaking changes here have been transitioned
2316 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2317 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2318 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2319 should instead check the variable at runtime with `std::env`. That the value
2320 was set at build time was a bug, and incorrect when cross-compiling. This
2321 change is known to cause breakage.
2322 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
2323 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
2324 1.10 and is now an error by default. It will become a hard error in the near
2326 * [The semantics relating modules to file system directories are changing in
2327 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
2328 lint, which is a warning in this release, and will become a hard error in the
2330 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2331 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
2332 the underlying iterator][37834]
2334 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
2335 [33685]: https://github.com/rust-lang/rust/issues/33685
2336 [36868]: https://github.com/rust-lang/rust/pull/36868
2337 [37127]: https://github.com/rust-lang/rust/pull/37127
2338 [37229]: https://github.com/rust-lang/rust/pull/37229
2339 [37456]: https://github.com/rust-lang/rust/pull/37456
2340 [37527]: https://github.com/rust-lang/rust/pull/37527
2341 [37602]: https://github.com/rust-lang/rust/pull/37602
2342 [37613]: https://github.com/rust-lang/rust/pull/37613
2343 [37615]: https://github.com/rust-lang/rust/pull/37615
2344 [37636]: https://github.com/rust-lang/rust/pull/37636
2345 [37627]: https://github.com/rust-lang/rust/pull/37627
2346 [37642]: https://github.com/rust-lang/rust/pull/37642
2347 [37677]: https://github.com/rust-lang/rust/pull/37677
2348 [37699]: https://github.com/rust-lang/rust/pull/37699
2349 [37701]: https://github.com/rust-lang/rust/pull/37701
2350 [37705]: https://github.com/rust-lang/rust/pull/37705
2351 [37749]: https://github.com/rust-lang/rust/pull/37749
2352 [37760]: https://github.com/rust-lang/rust/pull/37760
2353 [37763]: https://github.com/rust-lang/rust/pull/37763
2354 [37764]: https://github.com/rust-lang/rust/pull/37764
2355 [37789]: https://github.com/rust-lang/rust/pull/37789
2356 [37791]: https://github.com/rust-lang/rust/pull/37791
2357 [37814]: https://github.com/rust-lang/rust/pull/37814
2358 [37817]: https://github.com/rust-lang/rust/pull/37817
2359 [37834]: https://github.com/rust-lang/rust/pull/37834
2360 [37848]: https://github.com/rust-lang/rust/pull/37848
2361 [37855]: https://github.com/rust-lang/rust/pull/37855
2362 [37882]: https://github.com/rust-lang/rust/pull/37882
2363 [37888]: https://github.com/rust-lang/rust/pull/37888
2364 [37973]: https://github.com/rust-lang/rust/pull/37973
2365 [37979]: https://github.com/rust-lang/rust/pull/37979
2366 [38086]: https://github.com/rust-lang/rust/pull/38086
2367 [38107]: https://github.com/rust-lang/rust/pull/38107
2368 [38117]: https://github.com/rust-lang/rust/pull/38117
2369 [38134]: https://github.com/rust-lang/rust/pull/38134
2370 [38146]: https://github.com/rust-lang/rust/pull/38146
2371 [38181]: https://github.com/rust-lang/rust/pull/38181
2372 [38182]: https://github.com/rust-lang/rust/pull/38182
2373 [38185]: https://github.com/rust-lang/rust/pull/38185
2374 [38192]: https://github.com/rust-lang/rust/pull/38192
2375 [38279]: https://github.com/rust-lang/rust/pull/38279
2376 [38835]: https://github.com/rust-lang/rust/pull/38835
2377 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2378 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2379 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
2380 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
2381 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
2382 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
2383 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
2384 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
2385 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
2386 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
2387 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
2388 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
2389 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
2390 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
2391 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
2392 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
2393 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
2394 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
2395 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
2396 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
2397 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
2398 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
2399 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
2400 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
2401 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
2402 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
2403 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
2404 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
2405 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
2406 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
2407 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
2408 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
2409 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
2410 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
2411 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
2412 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
2413 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
2414 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
2417 Version 1.14.0 (2016-12-22)
2418 ===========================
2423 * [`..` matches multiple tuple fields in enum variants, structs
2424 and tuples][36843]. [RFC 1492].
2425 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
2426 * [`use *` and `use ::*` both glob-import from the crate root][37367]
2427 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
2428 dereferencing][36822]
2433 * [Mark enums with non-zero discriminant as non-zero][37224]
2434 * [Lower-case `static mut` names are linted like other
2435 statics and consts][37162]
2436 * [Fix ICE on some macros in const integer positions
2437 (e.g. `[u8; m!()]`)][36819]
2438 * [Improve error message and snippet for "did you mean `x`"][36798]
2439 * [Add a panic-strategy field to the target specification][36794]
2440 * [Include LLVM version in `--version --verbose`][37200]
2442 Compile-time Optimizations
2443 --------------------------
2445 * [Improve macro expansion performance][37569]
2446 * [Shrink `Expr_::ExprInlineAsm`][37445]
2447 * [Replace all uses of SHA-256 with BLAKE2b][37439]
2448 * [Reduce the number of bytes hashed by `IchHasher`][37427]
2449 * [Avoid more allocations when compiling html5ever][37373]
2450 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
2451 * [Avoid some allocations in the macro parser][37318]
2452 * [Use a faster deflate setting][37298]
2453 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
2454 during interning of slices][37270]
2455 * [Optimize `write_metadata`][37267]
2456 * [Don't process obligation forest cycles when stalled][37231]
2457 * [Avoid many `CrateConfig` clones][37161]
2458 * [Optimize `Substs::super_fold_with`][37108]
2459 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
2460 * [Speed up `plug_leaks`][36917]
2465 * [`println!()`, with no arguments, prints newline][36825].
2466 Previously, an empty string was required to achieve the same.
2467 * [`Wrapping` impls standard binary and unary operators, as well as
2468 the `Sum` and `Product` iterators][37356]
2469 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
2471 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
2472 `VecDeque` iterators][37315]
2473 * [Improve `SipHasher` performance on small values][37312]
2474 * [Add Iterator trait TrustedLen to enable better FromIterator /
2476 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
2477 * [`ReadDir` implements `Debug`][37221]
2478 * [Implement `RefUnwindSafe` for atomic types][37178]
2479 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
2480 * [Avoid allocations in `Decoder::read_str`][37064]
2481 * [`io::Error` implements `From<io::ErrorKind>`][37037]
2482 * [Impl `Debug` for raw pointers to unsized data][36880]
2483 * [Don't reuse `HashMap` random seeds][37470]
2484 * [The internal memory layout of `HashMap` is more cache-friendly, for
2485 significant improvements in some operations][36692]
2486 * [`HashMap` uses less memory on 32-bit architectures][36595]
2487 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
2492 * [Expose rustc cfg values to build scripts][cargo/3243]
2493 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
2494 * [Fix passing --features when testing multiple packages][cargo/3280]
2495 * [Use a single profile set per workspace][cargo/3249]
2496 * [Load `replace` sections from lock files][cargo/3220]
2497 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
2502 * [rustup is the recommended Rust installation method][1.14rustup]
2503 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
2504 S390x. These are [tier 2] platforms and may have major defects. Follow the
2505 instructions on the website to install, or add the targets to an existing
2506 installation with `rustup target add`. The new target triples are:
2507 - `mips-unknown-linux-gnu`
2508 - `mipsel-unknown-linux-gnu`
2509 - `mips64-unknown-linux-gnuabi64`
2510 - `mips64el-unknown-linux-gnuabi64 `
2511 - `powerpc-unknown-linux-gnu`
2512 - `powerpc64-unknown-linux-gnu`
2513 - `powerpc64le-unknown-linux-gnu`
2514 - `s390x-unknown-linux-gnu `
2515 * This release includes target (std) builds for ARM Linux running MUSL
2516 libc. These are [tier 2] platforms and may have major defects. Add the
2517 following triples to an existing rustup installation with `rustup target add`:
2518 - `arm-unknown-linux-musleabi`
2519 - `arm-unknown-linux-musleabihf`
2520 - `armv7-unknown-linux-musleabihf`
2521 * This release includes [experimental support for WebAssembly][1.14wasm], via
2522 the `wasm32-unknown-emscripten` target. This target is known to have major
2523 defects. Please test, report, and fix.
2524 * rustup no longer installs documentation by default. Run `rustup
2525 component add rust-docs` to install.
2526 * [Fix line stepping in debugger][37310]
2527 * [Enable line number debuginfo in releases][37280]
2532 * [Disable jemalloc on aarch64/powerpc/mips][37392]
2533 * [Add support for Fuchsia OS][37313]
2534 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
2539 * [A number of forward-compatibility lints used by the compiler
2540 to gradually introduce language changes have been converted
2541 to deny by default][36894]:
2542 - ["use of inaccessible extern crate erroneously allowed"][36886]
2543 - ["type parameter default erroneously allowed in invalid location"][36887]
2544 - ["detects super or self keywords at the beginning of global path"][36888]
2545 - ["two overlapping inherent impls define an item with the same name
2546 were erroneously allowed"][36889]
2547 - ["floating-point constants cannot be used in patterns"][36890]
2548 - ["constants of struct or enum type can only be used in a pattern if
2549 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
2550 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
2551 * [Prohibit patterns in trait methods without bodies][37378]
2552 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
2553 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
2554 * [The `$crate` macro variable is accepted in fewer locations][37213]
2555 * [Impls specifying extra region requirements beyond the trait
2556 they implement are rejected][37167]
2557 * [Enums may not be unsized][37111]. Unsized enums are intended to
2558 work but never have. For now they are forbidden.
2559 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
2561 [tier 2]: https://forge.rust-lang.org/platform-support.html
2562 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
2563 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
2564 [36430]: https://github.com/rust-lang/rust/pull/36430
2565 [36595]: https://github.com/rust-lang/rust/pull/36595
2566 [36595]: https://github.com/rust-lang/rust/pull/36595
2567 [36692]: https://github.com/rust-lang/rust/pull/36692
2568 [36767]: https://github.com/rust-lang/rust/pull/36767
2569 [36794]: https://github.com/rust-lang/rust/pull/36794
2570 [36798]: https://github.com/rust-lang/rust/pull/36798
2571 [36819]: https://github.com/rust-lang/rust/pull/36819
2572 [36822]: https://github.com/rust-lang/rust/pull/36822
2573 [36825]: https://github.com/rust-lang/rust/pull/36825
2574 [36843]: https://github.com/rust-lang/rust/pull/36843
2575 [36880]: https://github.com/rust-lang/rust/pull/36880
2576 [36886]: https://github.com/rust-lang/rust/issues/36886
2577 [36887]: https://github.com/rust-lang/rust/issues/36887
2578 [36888]: https://github.com/rust-lang/rust/issues/36888
2579 [36889]: https://github.com/rust-lang/rust/issues/36889
2580 [36890]: https://github.com/rust-lang/rust/issues/36890
2581 [36891]: https://github.com/rust-lang/rust/issues/36891
2582 [36892]: https://github.com/rust-lang/rust/issues/36892
2583 [36894]: https://github.com/rust-lang/rust/pull/36894
2584 [36917]: https://github.com/rust-lang/rust/pull/36917
2585 [36993]: https://github.com/rust-lang/rust/pull/36993
2586 [37037]: https://github.com/rust-lang/rust/pull/37037
2587 [37064]: https://github.com/rust-lang/rust/pull/37064
2588 [37094]: https://github.com/rust-lang/rust/pull/37094
2589 [37108]: https://github.com/rust-lang/rust/pull/37108
2590 [37111]: https://github.com/rust-lang/rust/pull/37111
2591 [37161]: https://github.com/rust-lang/rust/pull/37161
2592 [37162]: https://github.com/rust-lang/rust/pull/37162
2593 [37167]: https://github.com/rust-lang/rust/pull/37167
2594 [37178]: https://github.com/rust-lang/rust/pull/37178
2595 [37200]: https://github.com/rust-lang/rust/pull/37200
2596 [37213]: https://github.com/rust-lang/rust/pull/37213
2597 [37221]: https://github.com/rust-lang/rust/pull/37221
2598 [37224]: https://github.com/rust-lang/rust/pull/37224
2599 [37230]: https://github.com/rust-lang/rust/pull/37230
2600 [37231]: https://github.com/rust-lang/rust/pull/37231
2601 [37247]: https://github.com/rust-lang/rust/pull/37247
2602 [37267]: https://github.com/rust-lang/rust/pull/37267
2603 [37270]: https://github.com/rust-lang/rust/pull/37270
2604 [37273]: https://github.com/rust-lang/rust/pull/37273
2605 [37280]: https://github.com/rust-lang/rust/pull/37280
2606 [37298]: https://github.com/rust-lang/rust/pull/37298
2607 [37306]: https://github.com/rust-lang/rust/pull/37306
2608 [37310]: https://github.com/rust-lang/rust/pull/37310
2609 [37312]: https://github.com/rust-lang/rust/pull/37312
2610 [37313]: https://github.com/rust-lang/rust/pull/37313
2611 [37315]: https://github.com/rust-lang/rust/pull/37315
2612 [37318]: https://github.com/rust-lang/rust/pull/37318
2613 [37322]: https://github.com/rust-lang/rust/pull/37322
2614 [37326]: https://github.com/rust-lang/rust/pull/37326
2615 [37351]: https://github.com/rust-lang/rust/pull/37351
2616 [37356]: https://github.com/rust-lang/rust/pull/37356
2617 [37367]: https://github.com/rust-lang/rust/pull/37367
2618 [37373]: https://github.com/rust-lang/rust/pull/37373
2619 [37378]: https://github.com/rust-lang/rust/pull/37378
2620 [37389]: https://github.com/rust-lang/rust/pull/37389
2621 [37392]: https://github.com/rust-lang/rust/pull/37392
2622 [37427]: https://github.com/rust-lang/rust/pull/37427
2623 [37439]: https://github.com/rust-lang/rust/pull/37439
2624 [37445]: https://github.com/rust-lang/rust/pull/37445
2625 [37470]: https://github.com/rust-lang/rust/pull/37470
2626 [37569]: https://github.com/rust-lang/rust/pull/37569
2627 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2628 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
2629 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
2630 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
2631 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
2632 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
2633 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
2636 Version 1.13.0 (2016-11-10)
2637 ===========================
2642 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
2643 errors, like the `try!` macro, described in [RFC 0243].
2644 * [Stabilize macros in type position][36014]. Described in [RFC 873].
2645 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
2646 * [Fix `#[derive]` for empty tuple structs/variants][35728]
2647 * [Fix lifetime rules for 'if' conditions][36029]
2648 * [Avoid loading and parsing unconfigured non-inline modules][36482]
2653 * [Add the `-C link-arg` argument][36574]
2654 * [Remove the old AST-based backend from rustc_trans][35764]
2655 * [Don't enable NEON by default on armv7 Linux][35814]
2656 * [Fix debug line number info for macro expansions][35238]
2657 * [Do not emit "class method" debuginfo for types that are not
2658 DICompositeType][36008]
2659 * [Warn about multiple conflicting #[repr] hints][34623]
2660 * [When sizing DST, don't double-count nested struct prefixes][36351]
2661 * [Default RUST_MIN_STACK to 16MiB for now][36505]
2662 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
2663 * [Reject macros with empty repetitions to avoid infinite loop][36721]
2664 * [Expand macros without recursing to avoid stack overflows][36214]
2669 * [Replace macro backtraces with labeled local uses][35702]
2670 * [Improve error message for misplaced doc comments][33922]
2671 * [Buffer unix and lock windows to prevent message interleaving][35975]
2672 * [Update lifetime errors to specifically note temporaries][36171]
2673 * [Special case a few colors for Windows][36178]
2674 * [Suggest `use self` when such an import resolves][36289]
2675 * [Be more specific when type parameter shadows primitive type][36338]
2676 * Many minor improvements
2678 Compile-time Optimizations
2679 --------------------------
2681 * [Compute and cache HIR hashes at beginning][35854]
2682 * [Don't hash types in loan paths][36004]
2683 * [Cache projections in trans][35761]
2684 * [Optimize the parser's last token handling][36527]
2685 * [Only instantiate #[inline] functions in codegen units referencing
2686 them][36524]. This leads to big improvements in cases where crates export
2687 define many inline functions without using them directly.
2688 * [Lazily allocate TypedArena's first chunk][36592]
2689 * [Don't allocate during default HashSet creation][36734]
2696 * [`overflowing_abs`]
2697 * [`RefCell::try_borrow`]
2698 * [`RefCell::try_borrow_mut`]
2703 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
2704 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
2706 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
2707 * [Implement `Debug` for `std::vec::IntoIter`][35707]
2708 * [`CString`: avoid excessive growth just to 0-terminate][35871]
2709 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
2710 * [Use arc4rand on FreeBSD][35884]
2711 * [memrchr: Correct aligned offset computation][35969]
2712 * [Improve Demangling of Rust Symbols][36059]
2713 * [Use monotonic time in condition variables][35048]
2714 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
2715 * [Implement conversion traits for `char`][35755]
2716 * [Fix illegal instruction caused by overflow in channel cloning][36104]
2717 * [Zero first byte of CString on drop][36264]
2718 * [Inherit overflow checks for sum and product][36372]
2719 * [Add missing Eq implementations][36423]
2720 * [Implement `Debug` for `DirEntry`][36631]
2721 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
2723 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2724 * [Implement more traits for `std::io::ErrorKind`][35911]
2725 * [Optimize BinaryHeap bounds checking][36072]
2726 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
2727 `extend_with_element`][36355]
2728 * [Fix overflow checking in unsigned pow()][34942]
2733 * This release includes security fixes to both curl and OpenSSL.
2734 * [Fix transitive doctests when panic=abort][cargo/3021]
2735 * [Add --all-features flag to cargo][cargo/3038]
2736 * [Reject path-based dependencies in `cargo package`][cargo/3060]
2737 * [Don't parse the home directory more than once][cargo/3078]
2738 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
2739 * [Update OpenSSL to 1.0.2j][cargo/3121]
2740 * [Add license and license_file to cargo metadata output][cargo/3110]
2741 * [Make crates-io registry URL optional in config; ignore all changes to
2742 source.crates-io][cargo/3089]
2743 * [Don't download dependencies from other platforms][cargo/3123]
2744 * [Build transitive dev-dependencies when needed][cargo/3125]
2745 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
2746 * [Avoid updating registry when adding existing deps][cargo/3144]
2747 * [Warn about path overrides that won't work][cargo/3136]
2748 * [Use workspaces during `cargo install`][cargo/3146]
2749 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
2750 * [Add --message-format flag][cargo/3000]
2751 * [Pass target environment for rustdoc][cargo/3205]
2752 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
2753 * [Update curl and curl-sys][cargo/3241]
2754 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
2759 * [rustdoc: Add the `--sysroot` argument][36586]
2760 * [rustdoc: Fix a couple of issues with the search results][35655]
2761 * [rustdoc: remove the `!` from macro URLs and titles][35234]
2762 * [gdb: Fix pretty-printing special-cased Rust types][35585]
2763 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
2768 * [Remove unmaintained style guide][35124]
2769 * [Add s390x support][36369]
2770 * [Initial work at Haiku OS support][36727]
2771 * [Add mips-uclibc targets][35734]
2772 * [Crate-ify compiler-rt into compiler-builtins][35021]
2773 * [Add rustc version info (git hash + date) to dist tarball][36213]
2774 * Many documentation improvements
2779 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2780 * [Deny (by default) transmuting from fn item types to pointer-sized
2781 types][34923]. Continuing the long transition to zero-sized fn items,
2783 * [Fix `#[derive]` for empty tuple structs/variants][35728].
2785 * [Issue deprecation warnings for safe accesses to extern statics][36173]
2786 * [Fix lifetime rules for 'if' conditions][36029].
2787 * [Inherit overflow checks for sum and product][36372].
2788 * [Forbid user-defined macros named "macro_rules"][36730].
2790 [33922]: https://github.com/rust-lang/rust/pull/33922
2791 [34623]: https://github.com/rust-lang/rust/pull/34623
2792 [34923]: https://github.com/rust-lang/rust/pull/34923
2793 [34942]: https://github.com/rust-lang/rust/pull/34942
2794 [34982]: https://github.com/rust-lang/rust/pull/34982
2795 [35021]: https://github.com/rust-lang/rust/pull/35021
2796 [35048]: https://github.com/rust-lang/rust/pull/35048
2797 [35074]: https://github.com/rust-lang/rust/pull/35074
2798 [35124]: https://github.com/rust-lang/rust/pull/35124
2799 [35234]: https://github.com/rust-lang/rust/pull/35234
2800 [35238]: https://github.com/rust-lang/rust/pull/35238
2801 [35354]: https://github.com/rust-lang/rust/pull/35354
2802 [35559]: https://github.com/rust-lang/rust/pull/35559
2803 [35585]: https://github.com/rust-lang/rust/pull/35585
2804 [35627]: https://github.com/rust-lang/rust/pull/35627
2805 [35655]: https://github.com/rust-lang/rust/pull/35655
2806 [35702]: https://github.com/rust-lang/rust/pull/35702
2807 [35707]: https://github.com/rust-lang/rust/pull/35707
2808 [35728]: https://github.com/rust-lang/rust/pull/35728
2809 [35734]: https://github.com/rust-lang/rust/pull/35734
2810 [35755]: https://github.com/rust-lang/rust/pull/35755
2811 [35761]: https://github.com/rust-lang/rust/pull/35761
2812 [35764]: https://github.com/rust-lang/rust/pull/35764
2813 [35814]: https://github.com/rust-lang/rust/pull/35814
2814 [35854]: https://github.com/rust-lang/rust/pull/35854
2815 [35871]: https://github.com/rust-lang/rust/pull/35871
2816 [35884]: https://github.com/rust-lang/rust/pull/35884
2817 [35911]: https://github.com/rust-lang/rust/pull/35911
2818 [35969]: https://github.com/rust-lang/rust/pull/35969
2819 [35975]: https://github.com/rust-lang/rust/pull/35975
2820 [36004]: https://github.com/rust-lang/rust/pull/36004
2821 [36008]: https://github.com/rust-lang/rust/pull/36008
2822 [36014]: https://github.com/rust-lang/rust/pull/36014
2823 [36029]: https://github.com/rust-lang/rust/pull/36029
2824 [36059]: https://github.com/rust-lang/rust/pull/36059
2825 [36072]: https://github.com/rust-lang/rust/pull/36072
2826 [36101]: https://github.com/rust-lang/rust/pull/36101
2827 [36104]: https://github.com/rust-lang/rust/pull/36104
2828 [36171]: https://github.com/rust-lang/rust/pull/36171
2829 [36173]: https://github.com/rust-lang/rust/pull/36173
2830 [36178]: https://github.com/rust-lang/rust/pull/36178
2831 [36213]: https://github.com/rust-lang/rust/pull/36213
2832 [36214]: https://github.com/rust-lang/rust/pull/36214
2833 [36264]: https://github.com/rust-lang/rust/pull/36264
2834 [36266]: https://github.com/rust-lang/rust/pull/36266
2835 [36289]: https://github.com/rust-lang/rust/pull/36289
2836 [36338]: https://github.com/rust-lang/rust/pull/36338
2837 [36351]: https://github.com/rust-lang/rust/pull/36351
2838 [36355]: https://github.com/rust-lang/rust/pull/36355
2839 [36369]: https://github.com/rust-lang/rust/pull/36369
2840 [36372]: https://github.com/rust-lang/rust/pull/36372
2841 [36423]: https://github.com/rust-lang/rust/pull/36423
2842 [36482]: https://github.com/rust-lang/rust/pull/36482
2843 [36505]: https://github.com/rust-lang/rust/pull/36505
2844 [36524]: https://github.com/rust-lang/rust/pull/36524
2845 [36527]: https://github.com/rust-lang/rust/pull/36527
2846 [36551]: https://github.com/rust-lang/rust/pull/36551
2847 [36574]: https://github.com/rust-lang/rust/pull/36574
2848 [36586]: https://github.com/rust-lang/rust/pull/36586
2849 [36592]: https://github.com/rust-lang/rust/pull/36592
2850 [36631]: https://github.com/rust-lang/rust/pull/36631
2851 [36639]: https://github.com/rust-lang/rust/pull/36639
2852 [36721]: https://github.com/rust-lang/rust/pull/36721
2853 [36727]: https://github.com/rust-lang/rust/pull/36727
2854 [36730]: https://github.com/rust-lang/rust/pull/36730
2855 [36734]: https://github.com/rust-lang/rust/pull/36734
2856 [36754]: https://github.com/rust-lang/rust/pull/36754
2857 [36995]: https://github.com/rust-lang/rust/pull/36995
2858 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
2859 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
2860 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2861 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
2862 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
2863 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
2864 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
2865 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
2866 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
2867 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
2868 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
2869 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
2870 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
2871 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
2872 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
2873 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
2874 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
2875 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
2876 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
2877 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
2878 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
2879 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
2880 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
2881 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
2882 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
2883 [rustup]: https://www.rustup.rs
2884 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
2885 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
2886 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
2887 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
2888 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
2889 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
2890 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
2893 Version 1.12.1 (2016-10-20)
2894 ===========================
2899 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
2900 * [Confusion with double negation and booleans][36856]
2901 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
2902 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
2903 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
2904 * [Corrupted memory after updated to 1.12][36936]
2905 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
2906 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
2907 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
2909 [36381]: https://github.com/rust-lang/rust/issues/36381
2910 [36856]: https://github.com/rust-lang/rust/issues/36856
2911 [36875]: https://github.com/rust-lang/rust/issues/36875
2912 [36924]: https://github.com/rust-lang/rust/issues/36924
2913 [36926]: https://github.com/rust-lang/rust/issues/36926
2914 [36936]: https://github.com/rust-lang/rust/issues/36936
2915 [37026]: https://github.com/rust-lang/rust/issues/37026
2916 [37112]: https://github.com/rust-lang/rust/issues/37112
2917 [37153]: https://github.com/rust-lang/rust/issues/37153
2920 Version 1.12.0 (2016-09-29)
2921 ===========================
2926 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2927 This translation pass is far simpler than the previous AST->LLVM pass, and
2928 creates opportunities to perform new optimizations directly on the MIR. It
2929 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2930 * [`rustc` presents a new, more readable error format, along with
2931 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2932 Most common editors supporting Rust have been updated to work with it. It was
2933 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2938 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2939 This translation pass is far simpler than the previous AST->LLVM pass, and
2940 creates opportunities to perform new optimizations directly on the MIR. It
2941 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2942 * [Print the Rust target name, not the LLVM target name, with
2943 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
2944 * [The computation of `TypeId` is correct in some cases where it was previously
2945 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
2946 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
2947 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
2948 `--print relocation-models`, and `--print code-models` print the available
2949 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
2950 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
2951 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
2952 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
2953 These targets produce statically-linked binaries. There are no binary release
2959 * [`rustc` presents a new, more readable error format, along with
2960 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2961 Most common editors supporting Rust have been updated to work with it. It was
2962 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2963 * [In error descriptions, references are now described in plain English,
2964 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
2965 * [In error type descriptions, unknown numeric types are named `{integer}` or
2966 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
2967 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
2972 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
2973 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
2974 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
2975 useful](https://github.com/rust-lang/rust/pull/34908)
2976 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
2977 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
2978 * [Semicolons are properly required as statement delimiters inside
2979 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
2980 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2985 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
2986 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
2987 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
2988 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
2989 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
2990 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
2991 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
2992 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
2993 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
2994 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
2995 Both on Unix and Windows.
2996 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
2997 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
2998 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
2999 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
3000 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
3001 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
3002 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
3003 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
3008 * [The `format!` macro and friends now allow a single argument to be formatted
3009 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
3010 * [The lifetime bounds on `[T]::binary_search_by` and
3011 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
3012 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
3013 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
3014 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
3015 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
3016 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
3017 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
3018 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
3019 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
3020 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
3021 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
3022 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
3023 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
3024 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
3025 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
3026 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
3027 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
3028 * [`mpsc::sync_channel` `Receiver`s return any available message before
3029 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
3030 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
3031 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
3036 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
3037 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
3038 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
3039 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
3040 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
3041 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
3042 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
3043 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
3044 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
3045 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
3046 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
3047 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
3048 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
3049 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
3050 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
3051 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
3056 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
3057 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
3062 * [Test binaries now support a `--test-threads` argument to specify the number
3063 of threads used to run tests, and which acts the same as the
3064 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
3065 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
3066 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
3067 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
3068 * [Rust releases now come with source packages that can be installed by rustup
3069 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
3070 The resulting source code can be used by tools and IDES, located in the
3071 sysroot under `lib/rustlib/src`.
3076 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
3077 * Many minor improvements to the documentation.
3078 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
3083 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
3084 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
3085 * [When formatting strings, if "precision" is specified, the "fill",
3086 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
3087 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
3090 Version 1.11.0 (2016-08-18)
3091 ===========================
3096 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
3097 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
3098 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
3099 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
3100 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
3105 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
3106 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
3107 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
3108 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
3109 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
3110 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
3111 (in libcore - previously stabilized in libstd)
3112 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
3113 (in libcore - previously stabilized in libstd)
3114 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
3115 (in libcore - previously stabilized in libstd)
3116 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
3117 (in libcore - previously stabilized in libstd)
3118 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3119 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3120 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
3121 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
3126 * [The `thread_local!` macro supports multiple definitions in a single
3127 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
3128 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
3129 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
3130 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
3131 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
3132 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
3133 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
3134 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
3139 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
3140 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
3141 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
3142 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
3143 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
3144 and `-vv` prints warnings for all crates.
3145 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
3146 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
3147 This provides room for expansion by arbitrary tools.
3148 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
3149 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
3150 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
3151 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
3152 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
3153 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
3154 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
3159 * [Caching projections speeds up type check dramatically for some
3160 workloads](https://github.com/rust-lang/rust/pull/33816)
3161 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
3162 This hasher is faster, but is believed to provide sufficient
3163 protection from collision attacks.
3164 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
3169 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
3170 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
3171 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
3172 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
3173 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
3178 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
3179 * [When emitting debug info, rustc emits frame pointers for closures,
3180 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
3181 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
3182 * Many more errors have been given error codes and extended
3184 * API documentation continues to be improved, with many new examples
3189 * [rustc no longer hangs when dependencies recursively re-export
3190 submodules](https://github.com/rust-lang/rust/pull/34542)
3191 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
3192 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
3193 rewritten](https://github.com/rust-lang/rust/pull/33895)
3194 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
3195 No targets use this yet, but it works toward AVR support.
3200 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
3201 * [The new follow-set rules that place restrictions on `macro_rules!`
3202 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
3203 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
3204 and has been a warning since 1.10.
3205 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
3206 This causes breakage in some corner cases.
3209 Version 1.10.0 (2016-07-07)
3210 ===========================
3215 * [Allow `concat_idents!` in type positions as well as in expression
3216 positions](https://github.com/rust-lang/rust/pull/33735).
3217 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
3218 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
3219 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
3220 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
3221 * [`panic!` can be converted to a runtime abort with the
3222 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
3223 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3224 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
3225 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
3226 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-cdylib.md).
3227 Note that Cargo does not yet directly support cdylibs.
3232 * `os::windows::fs::OpenOptionsExt::access_mode`
3233 * `os::windows::fs::OpenOptionsExt::share_mode`
3234 * `os::windows::fs::OpenOptionsExt::custom_flags`
3235 * `os::windows::fs::OpenOptionsExt::attributes`
3236 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
3237 * `os::unix::fs::OpenOptionsExt::custom_flags`
3238 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
3239 * `Default for sync::Weak`
3240 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
3241 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
3242 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
3243 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
3244 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
3245 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
3246 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
3247 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
3248 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
3249 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
3250 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
3251 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
3252 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
3253 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
3254 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
3255 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
3256 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
3257 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
3258 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
3259 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
3260 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
3261 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
3262 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
3263 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
3264 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
3265 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
3266 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
3267 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
3268 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
3269 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
3270 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
3271 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
3272 * Read/Write/RawFd impls for `UnixStream`
3273 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
3274 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
3275 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
3276 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
3277 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
3278 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
3279 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
3280 * RawFd impls for `UnixListener`
3281 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
3282 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
3283 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
3284 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
3285 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
3286 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
3287 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
3288 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
3289 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
3290 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
3291 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
3292 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
3293 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
3294 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
3295 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
3296 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
3297 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
3298 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
3299 * RawFd impls for `UnixDatagram`
3300 * `{BTree,Hash}Map::values_mut`
3301 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/std/primitive.slice.html#method.binary_search_by_key)
3306 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
3307 The semantics of this minor method are subtle and probably not what
3309 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
3310 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
3311 will fall back to `/dev/urandom` temporarily to avoid blocking
3312 during early boot](https://github.com/rust-lang/rust/pull/33086).
3313 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
3314 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
3315 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
3316 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
3317 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
3318 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
3319 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
3323 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
3324 This controls the runtime behavior of the `panic!` macro
3325 and can be either "unwind" (the default), or "abort".
3326 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3327 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
3328 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
3329 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
3330 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
3331 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
3332 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
3333 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
3334 By default they are retried twice, which can be customized with the
3335 `net.retry` value in `.cargo/config`.
3336 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
3337 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
3338 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
3339 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
3340 Makes it possible to install multiple crates in parallel.
3341 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
3342 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
3343 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
3344 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
3345 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
3346 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
3351 * [rustc memory usage was reduced by refactoring the context used for
3352 type checking](https://github.com/rust-lang/rust/pull/33425).
3353 * [Speed up creation of `HashMap`s by caching the random keys used
3354 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
3355 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
3356 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
3357 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
3358 10x faster than the previous lookup tables.
3359 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
3364 * Many incremental improvements to documentation and rustdoc.
3365 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
3366 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
3367 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
3368 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
3369 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
3370 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
3371 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
3376 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
3377 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
3378 * [`std` no longer prints backtraces on platforms where the running
3379 module must be loaded with `env::current_exe`, which can't be relied
3380 on](https://github.com/rust-lang/rust/pull/33554).
3381 * This release includes std binaries for the i586-unknown-linux-gnu,
3382 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
3383 i586 target is for old x86 hardware without SSE2, and the armv7
3384 target is for Android running on modern ARM architectures.
3385 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
3386 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
3387 * [On Unix the runtime aborts by calling `libc::abort` instead of
3388 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
3389 * [Rust is now bootstrapped from the previous release of Rust,
3390 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
3395 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
3396 * [`target_env` for Linux ARM targets is just `gnu`, not
3397 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
3398 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
3399 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
3400 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
3401 Affects how macros are parsed.
3402 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
3403 * [Feature-gated attributes on macro-generated macro invocations are
3404 now rejected](https://github.com/rust-lang/rust/pull/32791).
3405 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
3406 This caused some minor changes to type inference.
3409 Version 1.9.0 (2016-05-26)
3410 ==========================
3415 * The `#[deprecated]` attribute when applied to an API will generate
3416 warnings when used. The warnings may be suppressed with
3417 `#[allow(deprecated)]`. [RFC 1270].
3418 * [`fn` item types are zero sized, and each `fn` names a unique
3419 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3420 `transmute` on a `fn` type will generate a warning for a few cycles,
3421 then will be converted to an error.
3422 * [Field and method resolution understand visibility, so private
3423 fields and methods cannot prevent the proper use of public fields
3424 and methods][1.9fv].
3425 * [The parser considers unicode codepoints in the
3426 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
3432 * [`std::panic::catch_unwind`][] (renamed from `recover`)
3433 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
3434 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
3435 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
3436 * [`str::is_char_boundary`]
3437 * [`<*const T>::as_ref`]
3438 * [`<*mut T>::as_ref`]
3439 * [`<*mut T>::as_mut`]
3440 * [`AsciiExt::make_ascii_uppercase`]
3441 * [`AsciiExt::make_ascii_lowercase`]
3442 * [`char::decode_utf16`]
3443 * [`char::DecodeUtf16`]
3444 * [`char::DecodeUtf16Error`]
3445 * [`char::DecodeUtf16Error::unpaired_surrogate`]
3446 * [`BTreeSet::take`]
3447 * [`BTreeSet::replace`]
3450 * [`HashSet::replace`]
3452 * [`OsString::with_capacity`]
3453 * [`OsString::clear`]
3454 * [`OsString::capacity`]
3455 * [`OsString::reserve`]
3456 * [`OsString::reserve_exact`]
3457 * [`OsStr::is_empty`]
3459 * [`std::os::unix::thread`]
3462 * [`JoinHandleExt::as_pthread_t`]
3463 * [`JoinHandleExt::into_pthread_t`]
3464 * [`HashSet::hasher`]
3465 * [`HashMap::hasher`]
3466 * [`CommandExt::exec`]
3467 * [`File::try_clone`]
3468 * [`SocketAddr::set_ip`]
3469 * [`SocketAddr::set_port`]
3470 * [`SocketAddrV4::set_ip`]
3471 * [`SocketAddrV4::set_port`]
3472 * [`SocketAddrV6::set_ip`]
3473 * [`SocketAddrV6::set_port`]
3474 * [`SocketAddrV6::set_flowinfo`]
3475 * [`SocketAddrV6::set_scope_id`]
3476 * [`slice::copy_from_slice`]
3477 * [`ptr::read_volatile`]
3478 * [`ptr::write_volatile`]
3479 * [`OpenOptions::create_new`]
3480 * [`TcpStream::set_nodelay`]
3481 * [`TcpStream::nodelay`]
3482 * [`TcpStream::set_ttl`]
3483 * [`TcpStream::ttl`]
3484 * [`TcpStream::set_only_v6`]
3485 * [`TcpStream::only_v6`]
3486 * [`TcpStream::take_error`]
3487 * [`TcpStream::set_nonblocking`]
3488 * [`TcpListener::set_ttl`]
3489 * [`TcpListener::ttl`]
3490 * [`TcpListener::set_only_v6`]
3491 * [`TcpListener::only_v6`]
3492 * [`TcpListener::take_error`]
3493 * [`TcpListener::set_nonblocking`]
3494 * [`UdpSocket::set_broadcast`]
3495 * [`UdpSocket::broadcast`]
3496 * [`UdpSocket::set_multicast_loop_v4`]
3497 * [`UdpSocket::multicast_loop_v4`]
3498 * [`UdpSocket::set_multicast_ttl_v4`]
3499 * [`UdpSocket::multicast_ttl_v4`]
3500 * [`UdpSocket::set_multicast_loop_v6`]
3501 * [`UdpSocket::multicast_loop_v6`]
3502 * [`UdpSocket::set_multicast_ttl_v6`]
3503 * [`UdpSocket::multicast_ttl_v6`]
3504 * [`UdpSocket::set_ttl`]
3505 * [`UdpSocket::ttl`]
3506 * [`UdpSocket::set_only_v6`]
3507 * [`UdpSocket::only_v6`]
3508 * [`UdpSocket::join_multicast_v4`]
3509 * [`UdpSocket::join_multicast_v6`]
3510 * [`UdpSocket::leave_multicast_v4`]
3511 * [`UdpSocket::leave_multicast_v6`]
3512 * [`UdpSocket::take_error`]
3513 * [`UdpSocket::connect`]
3514 * [`UdpSocket::send`]
3515 * [`UdpSocket::recv`]
3516 * [`UdpSocket::set_nonblocking`]
3521 * [`std::sync::Once` is poisoned if its initialization function
3523 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
3524 * [Most types implement `fmt::Debug`][1.9db].
3525 * [The default buffer size used by `BufReader` and `BufWriter` was
3526 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
3527 used by other languages.
3528 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
3529 `Duration` additionally implements `*=` and `/=`][1.9ta].
3530 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
3531 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
3532 * [`Chain` implements `BufRead`][1.9ch].
3533 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
3538 * [Cargo can now run concurrently][1.9cc].
3539 * [Top-level overrides allow specific revisions of crates to be
3540 overridden through the entire crate graph][1.9ct]. This is intended
3541 to make upgrades easier for large projects, by allowing crates to be
3542 forked temporarily until they've been upgraded and republished.
3543 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
3544 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
3545 on the commandline][1.9cf]. `rustc` arguments can also be specified
3546 in the `build.rustflags` configuration key.
3551 * [The time complexity of comparing variables for equivalence during type
3552 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
3553 to major compilation time improvement in some scenarios.
3554 * [`ToString` is specialized for `str`, giving it the same performance
3555 as `to_owned`][1.9ts].
3556 * [Spawning processes with `Command::output` no longer creates extra
3558 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
3559 for C-like enums][1.9cl].
3564 * [Passing the `--quiet` flag to a test runner will produce
3565 much-abbreviated output][1.9q].
3566 * The Rust Project now publishes std binaries for the
3567 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
3568 `i586-pc-windows-msvc` targets.
3573 * [`std::sync::Once` is poisoned if its initialization function
3575 * [It is illegal to define methods with the same name in overlapping
3576 inherent `impl` blocks][1.9sn].
3577 * [`fn` item types are zero sized, and each `fn` names a unique
3578 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3579 `transmute` on a `fn` type will generate a warning for a few cycles,
3580 then will be converted to an error.
3581 * [Improvements to const evaluation may trigger new errors when integer
3582 literals are out of range][1.9ce].
3585 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
3586 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
3587 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
3588 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
3589 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
3590 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
3591 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
3592 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
3593 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
3594 [1.9db]: https://github.com/rust-lang/rust/pull/32054
3595 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
3596 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
3597 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
3598 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
3599 [1.9o]: https://github.com/rust-lang/rust/pull/32325
3600 [1.9q]: https://github.com/rust-lang/rust/pull/31887
3601 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
3602 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
3603 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
3604 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
3605 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
3606 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
3607 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
3608 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
3609 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3610 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
3611 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3612 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
3613 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
3614 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
3615 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
3616 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
3617 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
3618 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
3619 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
3620 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
3621 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
3622 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
3623 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
3624 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
3625 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
3626 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
3627 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
3628 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
3629 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
3630 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
3631 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
3632 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
3633 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
3634 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
3635 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
3636 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
3637 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
3638 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
3639 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
3640 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
3641 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
3642 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
3643 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
3644 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
3645 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3646 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3647 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3648 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3649 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3650 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3651 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
3652 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3653 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
3654 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3655 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3656 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3657 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3658 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3659 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
3660 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
3661 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
3662 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
3663 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
3664 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
3665 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
3666 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
3667 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
3668 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
3669 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
3670 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
3671 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
3672 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
3673 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
3674 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
3675 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
3676 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
3677 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
3678 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
3679 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
3680 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
3681 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
3682 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
3683 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
3684 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
3685 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
3686 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
3687 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
3688 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
3689 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
3690 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
3691 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
3692 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
3693 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
3694 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
3697 Version 1.8.0 (2016-04-14)
3698 ==========================
3703 * Rust supports overloading of compound assignment statements like
3704 `+=` by implementing the [`AddAssign`], [`SubAssign`],
3705 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
3706 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
3708 * Empty structs can be defined with braces, as in `struct Foo { }`, in
3709 addition to the non-braced form, `struct Foo;`. [RFC 218].
3715 * [`str::encode_utf16`][] (renamed from `utf16_units`)
3716 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
3719 * [`ptr::drop_in_place`]
3721 * [`time::SystemTime`]
3723 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
3724 * [`Instant::elapsed`]
3725 * [`SystemTime::now`]
3726 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
3727 * [`SystemTime::elapsed`]
3728 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
3729 * [`SystemTimeError`]
3730 * [`SystemTimeError::duration`]
3731 * Various impls for `SystemTimeError`
3733 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
3734 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
3735 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
3736 * [The `write!` and `writeln!` macros correctly emit errors if any of
3737 their arguments can't be formatted][1.8w].
3738 * [Various I/O functions support large files on 32-bit Linux][1.8l].
3739 * [The Unix-specific `raw` modules, which contain a number of
3740 redefined C types are deprecated][1.8r], including `os::raw::unix`,
3741 `os::raw::macos`, and `os::raw::linux`. These modules defined types
3742 such as `ino_t` and `dev_t`. The inconsistency of these definitions
3743 across platforms was making it difficult to implement `std`
3744 correctly. Those that need these definitions should use the `libc`
3746 * The Unix-specific `MetadataExt` traits, including
3747 `os::unix::fs::MetadataExt`, which expose values such as inode
3748 numbers [no longer return platform-specific types][1.8r], but
3749 instead return widened integers. [RFC 1415].
3750 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
3751 * [Atomic loads and stores are not volatile][1.8a].
3752 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
3757 * [Inlining hash functions lead to a 3% compile-time improvement in
3758 some workloads][1.8h].
3759 * When using jemalloc, its symbols are [unprefixed so that it
3760 overrides the libc malloc implementation][1.8h]. This means that for
3761 rustc, LLVM is now using jemalloc, which results in a 6%
3762 compile-time improvement on a specific workload.
3763 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
3768 * [32-bit MSVC builds finally implement unwinding][1.8ms].
3769 i686-pc-windows-msvc is now considered a tier-1 platform.
3770 * [The `--print targets` flag prints a list of supported targets][1.8t].
3771 * [The `--print cfg` flag prints the `cfg`s defined for the current
3773 * [`rustc` can be built with an new Cargo-based build system, written
3774 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
3775 build system. To enable it configure with `configure --rustbuild`.
3776 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
3777 variants while also indicating the total number of missing variants
3778 if more than 3][1.8m].
3779 * [Executable stacks are disabled on Linux and BSD][1.8nx].
3780 * The Rust Project now publishes binary releases of the standard
3781 library for a number of tier-2 targets:
3782 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
3783 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
3784 `x86_64-rumprun-netbsd`. These can be installed with
3785 tools such as [multirust][1.8mr].
3790 * [`cargo init` creates a new Cargo project in the current
3791 directory][1.8ci]. It is otherwise like `cargo new`.
3792 * [Cargo has configuration keys for `-v` and
3793 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
3794 `[term]` section of `.cargo/config`.
3795 * [Configuration keys that evaluate to strings or integers can be set
3796 via environment variables][1.8ce]. For example the `build.jobs` key
3797 can be set via `CARGO_BUILD_JOBS`. Environment variables take
3798 precedence over config files.
3799 * [Target-specific dependencies support Rust `cfg` syntax for
3800 describing targets][1.8cfg] so that dependencies for multiple
3801 targets can be specified together. [RFC 1361].
3802 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
3803 `RUSTDOC` take precedence over the `build.target-dir`,
3804 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
3805 * [The child process tree is killed on Windows when Cargo is
3807 * [The `build.target` configuration value sets the target platform,
3808 like `--target`][1.8ct].
3813 * [Unstable compiler flags have been further restricted][1.8u]. Since
3814 1.0 `-Z` flags have been considered unstable, and other flags that
3815 were considered unstable additionally required passing `-Z
3816 unstable-options` to access. Unlike unstable language and library
3817 features though, these options have been accessible on the stable
3818 release channel. Going forward, *new unstable flags will not be
3819 available on the stable release channel*, and old unstable flags
3820 will warn about their usage. In the future, all unstable flags will
3821 be unavailable on the stable release channel.
3822 * [It is no longer possible to `match` on empty enum variants using
3823 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
3824 * The Unix-specific `MetadataExt` traits, including
3825 `os::unix::fs::MetadataExt`, which expose values such as inode
3826 numbers [no longer return platform-specific types][1.8r], but
3827 instead return widened integers. [RFC 1415].
3828 * [Modules sourced from the filesystem cannot appear within arbitrary
3829 blocks, but only within other modules][1.8mf].
3830 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
3831 * On Unix, [stack overflow triggers a runtime abort instead of a
3833 * [`Command::spawn` and its equivalents return an error if any of
3834 its command-line arguments contain interior `NUL`s][1.8n].
3835 * [Tuple and unit enum variants from other crates are in the type
3837 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
3838 type instead of `.a` files][1.8st]. Additionally, for the MSVC
3839 toolchain, `rustc` emits import libraries named `foo.dll.lib`
3840 instead of `foo.lib`.
3843 [1.8a]: https://github.com/rust-lang/rust/pull/30962
3844 [1.8b]: https://github.com/rust-lang/rust/pull/31123
3845 [1.8c]: https://github.com/rust-lang/rust/pull/31530
3846 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
3847 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
3848 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
3849 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
3850 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
3851 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
3852 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
3853 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
3854 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
3855 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
3856 [1.8h]: https://github.com/rust-lang/rust/pull/31460
3857 [1.8l]: https://github.com/rust-lang/rust/pull/31668
3858 [1.8m]: https://github.com/rust-lang/rust/pull/31020
3859 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
3860 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
3861 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
3862 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
3863 [1.8n]: https://github.com/rust-lang/rust/pull/31056
3864 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
3865 [1.8r]: https://github.com/rust-lang/rust/pull/31551
3866 [1.8so]: https://github.com/rust-lang/rust/pull/31333
3867 [1.8st]: https://github.com/rust-lang/rust/pull/29520
3868 [1.8t]: https://github.com/rust-lang/rust/pull/31358
3869 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
3870 [1.8u]: https://github.com/rust-lang/rust/pull/31793
3871 [1.8v]: https://github.com/rust-lang/rust/pull/31757
3872 [1.8w]: https://github.com/rust-lang/rust/pull/31904
3873 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
3874 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
3875 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
3876 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
3877 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
3878 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
3879 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
3880 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
3881 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
3882 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
3883 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
3884 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
3885 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
3886 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
3887 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
3888 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
3889 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
3890 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
3891 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
3892 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
3893 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
3894 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
3895 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
3896 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
3897 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
3898 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
3899 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
3900 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
3901 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
3902 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
3905 Version 1.7.0 (2016-03-03)
3906 ==========================
3913 * [`Path::strip_prefix`][] (renamed from relative_from)
3914 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
3916 * [`Ipv4Addr::is_loopback`]
3917 * [`Ipv4Addr::is_private`]
3918 * [`Ipv4Addr::is_link_local`]
3919 * [`Ipv4Addr::is_multicast`]
3920 * [`Ipv4Addr::is_broadcast`]
3921 * [`Ipv4Addr::is_documentation`]
3923 * [`Ipv6Addr::is_unspecified`]
3924 * [`Ipv6Addr::is_loopback`]
3925 * [`Ipv6Addr::is_multicast`]
3928 * [`Vec::as_mut_slice`]
3930 * [`String::as_str`]
3931 * [`String::as_mut_str`]
3933 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
3935 * `<[T]>::`[`sort_by_key`]
3936 * checked, saturated, and overflowing operations
3937 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
3938 * [`i32::saturating_mul`]
3939 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
3940 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
3941 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
3942 * [`u32::saturating_mul`]
3943 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
3944 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
3945 * and checked, saturated, and overflowing operations for other primitive types
3947 * [`ffi::IntoStringError`]
3948 * [`CString::into_string`]
3949 * [`CString::into_bytes`]
3950 * [`CString::into_bytes_with_nul`]
3951 * `From<CString> for Vec<u8>`
3953 * [`IntoStringError::into_cstring`]
3954 * [`IntoStringError::utf8_error`]
3955 * `Error for IntoStringError`
3957 * [`std::hash::BuildHasher`]
3958 * [`BuildHasher::Hasher`]
3959 * [`BuildHasher::build_hasher`]
3960 * [`std::hash::BuildHasherDefault`]
3961 * [`HashMap::with_hasher`]
3962 * [`HashMap::with_capacity_and_hasher`]
3963 * [`HashSet::with_hasher`]
3964 * [`HashSet::with_capacity_and_hasher`]
3965 * [`std::collections::hash_map::RandomState`]
3966 * [`RandomState::new`]
3967 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
3968 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
3969 from bytes is faster.
3970 * [The performance of `LineWriter` (and thus `io::stdout`) was
3971 improved by using `memchr` to search for newlines][1.7m].
3972 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
3973 `f64` variants were stabilized previously.
3974 * [`BTreeMap` was rewritten to use less memory and improve the performance
3975 of insertion and iteration, the latter by as much as 5x][1.7bm].
3976 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
3977 covariant over their contained type][1.7bt].
3978 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
3979 over their contained type][1.7ll].
3980 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
3982 * [`Any` is implemented for unsized types][1.7a].
3983 * [`Hash` is implemented for `Duration`][1.7h].
3988 * [When running tests with `--test`, rustdoc will pass `--cfg`
3989 arguments to the compiler][1.7dt].
3990 * [The compiler is built with RPATH information by default][1.7rpa].
3991 This means that it will be possible to run `rustc` when installed in
3992 unusual configurations without configuring the dynamic linker search
3994 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
3995 any RPATH entries (emitted with `-C rpath`) *not* take precedence
3996 over `LD_LIBRARY_PATH`.
4001 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
4002 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
4003 * [The `rerun-if-changed` build script directive no longer causes the
4004 build script to incorrectly run twice in certain scenarios][1.7rr].
4009 * Soundness fixes to the interactions between associated types and
4010 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
4011 code that violates the new rules. This is a significant change that
4012 is known to break existing code, so it has emitted warnings for the
4013 new error cases since 1.4 to give crate authors time to adapt. The
4014 details of what is changing are subtle; read the RFC for more.
4015 * [Several bugs in the compiler's visibility calculations were
4016 fixed][1.7v]. Since this was found to break significant amounts of
4017 code, the new errors will be emitted as warnings for several release
4018 cycles, under the `private_in_public` lint.
4019 * Defaulted type parameters were accidentally accepted in positions
4020 that were not intended. In this release, [defaulted type parameters
4021 appearing outside of type definitions will generate a
4022 warning][1.7d], which will become an error in future releases.
4023 * [Parsing "." as a float results in an error instead of 0][1.7p].
4024 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
4025 * [Borrows of closure parameters may not outlive the closure][1.7bc].
4027 [1.7a]: https://github.com/rust-lang/rust/pull/30928
4028 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
4029 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
4030 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
4031 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
4032 [1.7d]: https://github.com/rust-lang/rust/pull/30724
4033 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
4034 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
4035 [1.7f]: https://github.com/rust-lang/rust/pull/30672
4036 [1.7h]: https://github.com/rust-lang/rust/pull/30818
4037 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
4038 [1.7m]: https://github.com/rust-lang/rust/pull/30381
4039 [1.7p]: https://github.com/rust-lang/rust/pull/30681
4040 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
4041 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
4042 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
4043 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
4044 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
4045 [1.7v]: https://github.com/rust-lang/rust/pull/29973
4046 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4047 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4048 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
4049 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
4050 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
4051 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
4052 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
4053 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
4054 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
4055 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
4056 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
4057 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
4058 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
4059 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
4060 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
4061 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
4062 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
4063 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
4064 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
4065 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
4066 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
4067 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
4068 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
4069 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
4070 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
4071 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
4072 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
4073 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
4074 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
4075 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
4076 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
4077 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
4078 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
4079 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
4080 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
4081 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
4082 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
4083 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
4084 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
4085 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
4086 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
4087 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
4088 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
4089 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
4090 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
4091 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
4092 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
4093 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
4094 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
4095 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
4096 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
4097 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
4098 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
4099 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
4100 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
4101 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
4102 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
4103 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
4104 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
4105 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
4108 Version 1.6.0 (2016-01-21)
4109 ==========================
4114 * The `#![no_std]` attribute causes a crate to not be linked to the
4115 standard library, but only the [core library][1.6co], as described
4116 in [RFC 1184]. The core library defines common types and traits but
4117 has no platform dependencies whatsoever, and is the basis for Rust
4118 software in environments that cannot support a full port of the
4119 standard library, such as operating systems. Most of the core
4120 library is now stable.
4126 [`Read::read_exact`],
4127 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
4128 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
4129 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
4130 [`os::unix::fs::DirBuilderExt`],
4131 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
4132 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
4133 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
4134 [`collections::hash_map::Drain`],
4135 [`collections::hash_map::HashMap::drain`],
4136 [`collections::hash_set::Drain`],
4137 [`collections::hash_set::HashSet::drain`],
4138 [`collections::binary_heap::Drain`],
4139 [`collections::binary_heap::BinaryHeap::drain`],
4140 [`Vec::extend_from_slice`][] (renamed from `push_all`),
4141 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
4142 [`RwLock::into_inner`],
4143 [`Iterator::min_by_key`][] (renamed from `min_by`),
4144 [`Iterator::max_by_key`][] (renamed from `max_by`).
4145 * The [core library][1.6co] is stable, as are most of its APIs.
4146 * [The `assert_eq!` macro supports arguments that don't implement
4147 `Sized`][1.6ae], such as arrays. In this way it behaves more like
4149 * Several timer functions that take duration in milliseconds [are
4150 deprecated in favor of those that take `Duration`][1.6ms]. These
4151 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
4152 `thread::park_timeout_ms`.
4153 * The algorithm by which `Vec` reserves additional elements was
4154 [tweaked to not allocate excessive space][1.6a] while still growing
4156 * `From` conversions are [implemented from integers to floats][1.6f]
4157 in cases where the conversion is lossless. Thus they are not
4158 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
4159 or `f64`. They are also not implemented for `isize` and `usize`
4160 because the implementations would be platform-specific. `From` is
4161 also implemented from `f32` to `f64`.
4162 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
4163 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
4164 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
4165 * [`BinaryHeap` was refactored][1.6bh] for modest performance
4167 * Sorting slices that are already sorted [is 50% faster in some
4173 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
4174 * Cargo build scripts can specify their dependencies by emitting the
4175 [`rerun-if-changed`][1.6rr] key.
4176 * crates.io will reject publication of crates with dependencies that
4177 have a wildcard version constraint. Crates with wildcard
4178 dependencies were seen to cause a variety of problems, as described
4179 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
4181 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
4182 release folder. A variety of artifacts that Cargo failed to clean
4183 are now correctly deleted.
4188 * The `unreachable_code` lint [warns when a function call's argument
4190 * The parser indicates [failures that may be caused by
4191 confusingly-similar Unicode characters][1.6uc]
4192 * Certain macro errors [are reported at definition time][1.6m], not
4198 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
4199 environment variable when locating crates. This was a pre-cargo
4200 feature for integrating with the package manager that was
4201 accidentally never removed.
4202 * [A number of bugs were fixed in the privacy checker][1.6p] that
4203 could cause previously-accepted code to break.
4204 * [Modules and unit/tuple structs may not share the same name][1.6ts].
4205 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
4206 struct pattern syntax (`Foo(..)`) can no longer be used to match
4207 unit structs. This is a warning now, but will become an error in
4208 future releases. Patterns that share the same name as a const are
4210 * A bug was fixed that causes [rustc not to apply default type
4211 parameters][1.6xc] when resolving certain method implementations of
4212 traits defined in other crates.
4214 [1.6a]: https://github.com/rust-lang/rust/pull/29454
4215 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
4216 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
4217 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
4218 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
4219 [1.6co]: http://doc.rust-lang.org/core/index.html
4220 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
4221 [1.6f]: https://github.com/rust-lang/rust/pull/29129
4222 [1.6m]: https://github.com/rust-lang/rust/pull/29828
4223 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
4224 [1.6p]: https://github.com/rust-lang/rust/pull/29726
4225 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
4226 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
4227 [1.6s]: https://github.com/rust-lang/rust/pull/29675
4228 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
4229 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
4230 [1.6us]: https://github.com/rust-lang/rust/pull/29383
4231 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
4232 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
4233 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4234 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
4235 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
4236 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
4237 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
4238 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
4239 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
4240 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
4241 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
4242 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
4243 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
4244 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
4245 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
4246 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
4247 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
4248 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
4249 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
4250 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
4251 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
4252 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
4253 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
4254 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
4255 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
4256 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
4257 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
4258 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
4259 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
4260 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
4263 Version 1.5.0 (2015-12-10)
4264 ==========================
4266 * ~700 changes, numerous bugfixes
4272 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
4273 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
4274 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
4275 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
4276 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
4277 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
4278 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
4279 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
4280 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
4281 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
4282 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
4283 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
4284 [`Path::read_link`], [`Path::symlink_metadata`],
4285 [`Utf8Error::valid_up_to`], [`Vec::resize`],
4286 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
4287 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
4288 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
4289 [`slice::split_first_mut`], [`slice::split_first`],
4290 [`slice::split_last_mut`], [`slice::split_last`],
4291 [`char::from_u32_unchecked`], [`fs::canonicalize`],
4292 [`str::MatchIndices`], [`str::RMatchIndices`],
4293 [`str::match_indices`], [`str::rmatch_indices`],
4294 [`str::slice_mut_unchecked`], [`string::ParseError`].
4295 * Rust applications hosted on crates.io can be installed locally to
4296 `~/.cargo/bin` with the [`cargo install`] command. Among other
4297 things this makes it easier to augment Cargo with new subcommands:
4298 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
4299 invoked as `cargo foo`.
4300 * Crates with wildcard (`*`) dependencies will [emit warnings when
4301 published][1.5w]. In 1.6 it will no longer be possible to publish
4302 crates with wildcard dependencies.
4307 * The rules determining when a particular lifetime must outlive
4308 a particular value (known as '[dropck]') have been [modified
4309 to not rely on parametricity][1.5p].
4310 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
4311 and `Arc`][1.5a]. Because these smart pointer types implement
4312 `Deref`, this causes breakage in cases where the interior type
4313 contains methods of the same name.
4314 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
4315 that they could drop their content. Soundness fix.
4316 * All method invocations are [properly checked][1.5wf1] for
4317 [well-formedness][1.5wf2]. Soundness fix.
4318 * Traits whose supertraits contain `Self` are [not object
4319 safe][1.5o]. Soundness fix.
4320 * Target specifications support a [`no_default_libraries`][1.5nd]
4321 setting that controls whether `-nodefaultlibs` is passed to the
4322 linker, and in turn the `is_like_windows` setting no longer affects
4323 the `-nodefaultlibs` flag.
4324 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
4325 * The `#[inline]` and `#[repr]` attributes [can only appear
4326 in valid locations][1.5at].
4327 * Native libraries linked from the local crate are [passed to
4328 the linker before native libraries from upstream crates][1.5nl].
4329 * Two rarely-used attributes, `#[no_debug]` and
4330 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
4331 * Negation of unsigned integers, which has been a warning for
4332 several releases, [is now behind a feature gate and will
4333 generate errors][1.5nu].
4334 * The parser accidentally accepted visibility modifiers on
4335 enum variants, a bug [which has been fixed][1.5ev].
4336 * [A bug was fixed that allowed `use` statements to import unstable
4342 * When evaluating expressions at compile-time that are not
4343 compile-time constants (const-evaluating expressions in non-const
4344 contexts), incorrect code such as overlong bitshifts and arithmetic
4345 overflow will [generate a warning instead of an error][1.5ce],
4346 delaying the error until runtime. This will allow the
4347 const-evaluator to be expanded in the future backwards-compatibly.
4348 * The `improper_ctypes` lint [no longer warns about using `isize` and
4349 `usize` in FFI][1.5ict].
4354 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
4356 * `Default` is [implemented for mutable slices][1.5d].
4357 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
4358 * There are now `From` conversions [between floating point
4359 types][1.5f] where the conversions are lossless.
4360 * There are now `From` conversions [between integer types][1.5i] where
4361 the conversions are lossless.
4362 * [`fs::Metadata` implements `Clone`][1.5fs].
4363 * The `parse` method [accepts a leading "+" when parsing
4365 * [`AsMut` is implemented for `Vec`][1.5am].
4366 * The `clone_from` implementations for `String` and `BinaryHeap` [have
4367 been optimized][1.5cf] and no longer rely on the default impl.
4368 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
4369 `unsafe extern "C"` function types now [implement `Clone`,
4370 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
4371 `fmt::Debug` for up to 12 arguments][1.5fp].
4372 * [Dropping `Vec`s is much faster in unoptimized builds when the
4373 element types don't implement `Drop`][1.5dv].
4374 * A bug that caused in incorrect behavior when [combining `VecDeque`
4375 with zero-sized types][1.5vdz] was resolved.
4376 * [`PartialOrd` for slices is faster][1.5po].
4381 * [Crate metadata size was reduced by 20%][1.5md].
4382 * [Improvements to code generation reduced the size of libcore by 3.3
4383 MB and rustc's memory usage by 18MB][1.5m].
4384 * [Improvements to deref translation increased performance in
4385 unoptimized builds][1.5dr].
4386 * Various errors in trait resolution [are deduplicated to only be
4387 reported once][1.5te].
4388 * Rust has preliminary [support for rumprun kernels][1.5rr].
4389 * Rust has preliminary [support for NetBSD on amd64][1.5na].
4391 [1.5use]: https://github.com/rust-lang/rust/pull/28364
4392 [1.5po]: https://github.com/rust-lang/rust/pull/28436
4393 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
4394 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
4395 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
4396 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
4397 [1.5md]: https://github.com/rust-lang/rust/pull/28521
4398 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
4399 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
4400 [1.5na]: https://github.com/rust-lang/rust/pull/28543
4401 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
4402 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
4403 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
4404 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
4405 [1.5te]: https://github.com/rust-lang/rust/pull/28645
4406 [1.5at]: https://github.com/rust-lang/rust/pull/28650
4407 [1.5am]: https://github.com/rust-lang/rust/pull/28663
4408 [1.5m]: https://github.com/rust-lang/rust/pull/28778
4409 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
4410 [1.5a]: https://github.com/rust-lang/rust/pull/28811
4411 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
4412 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
4413 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
4414 [1.5i]: https://github.com/rust-lang/rust/pull/28921
4415 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
4416 [1.5f]: https://github.com/rust-lang/rust/pull/29129
4417 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
4418 [1.5s]: https://github.com/rust-lang/rust/pull/29190
4419 [1.5d]: https://github.com/rust-lang/rust/pull/29245
4420 [1.5o]: https://github.com/rust-lang/rust/pull/29259
4421 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
4422 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4423 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
4424 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
4425 [1.5c]: https://github.com/rust-lang/rust/pull/29110
4426 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4427 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
4428 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
4429 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
4430 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
4431 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
4432 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
4433 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
4434 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
4435 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
4436 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
4437 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
4438 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
4439 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
4440 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
4441 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
4442 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
4443 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
4444 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
4445 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
4446 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
4447 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
4448 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
4449 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
4450 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
4451 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
4452 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
4453 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
4454 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
4455 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
4456 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
4457 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
4458 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
4459 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
4460 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
4461 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
4462 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
4463 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
4464 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
4465 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
4466 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
4467 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
4468 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
4469 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
4470 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
4471 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
4472 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
4473 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
4474 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
4475 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
4476 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
4477 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
4478 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
4479 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
4481 Version 1.4.0 (2015-10-29)
4482 ==========================
4484 * ~1200 changes, numerous bugfixes
4489 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
4490 GNU) are now supported and recommended for use.
4495 * [Several changes have been made to fix type soundness and improve
4496 the behavior of associated types][sound]. See [RFC 1214]. Although
4497 we have mostly introduced these changes as warnings this release, to
4498 become errors next release, there are still some scenarios that will
4499 see immediate breakage.
4500 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
4501 line breaks in addition to `\n`][crlf].
4502 * [Loans of `'static` lifetime extend to the end of a function][stat].
4503 * [`str::parse` no longer introduces avoidable rounding error when
4504 parsing floating point numbers. Together with earlier changes to
4505 float formatting/output, "round trips" like f.to_string().parse()
4506 now preserve the value of f exactly. Additionally, leading plus
4507 signs are now accepted][fp3].
4513 * `use` statements that import multiple items [can now rename
4514 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
4515 * [Binops work correctly on fat pointers][binfat].
4516 * `pub extern crate`, which does not behave as expected, [issues a
4517 warning][pec] until a better solution is found.
4522 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
4523 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
4524 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
4525 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
4526 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
4527 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
4528 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
4529 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
4530 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
4531 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
4532 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
4533 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
4534 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
4535 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
4536 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
4537 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
4538 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
4539 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
4541 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
4542 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
4543 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
4544 `f64::from_str_radix`.
4545 * [Reverse-searching strings is faster with the 'two-way'
4547 * [`std::io::copy` allows `?Sized` arguments][cc].
4548 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
4549 [override `count`, `nth` and `last` with an O(1)
4550 implementation][it].
4551 * [`Default` is implemented for arrays up to `[T; 32]`][d].
4552 * [`IntoRawFd` has been added to the Unix-specific prelude,
4553 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
4555 * [`Extend<String>` and `FromIterator<String` are both implemented for
4557 * [`IntoIterator` is implemented for references to `Option` and
4559 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
4560 Copy`][ext] as part of [RFC 839]. This will cause type inference
4561 breakage in rare situations.
4562 * [`BinaryHeap` implements `Debug`][bh2].
4563 * [`Borrow` and `BorrowMut` are implemented for fixed-size
4565 * [`extern fn`s with the "Rust" and "C" ABIs implement common
4566 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
4567 * [String comparison is faster][faststr].
4568 * `&mut T` where `T: std::fmt::Write` [also implements
4569 `std::fmt::Write`][mutw].
4570 * [A stable regression in `VecDeque::push_back` and other
4571 capacity-altering methods that caused panics for zero-sized types
4573 * [Function pointers implement traits for up to 12 parameters][fp2].
4578 * The compiler [no longer uses the 'morestack' feature to prevent
4579 stack overflow][mm]. Instead it uses guard pages and stack
4580 probes (though stack probes are not yet implemented on any platform
4582 * [The compiler matches traits faster when projections are involved][p].
4583 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
4585 * [Cargo now displays useful information about what its doing during
4586 `cargo update`][cu].
4588 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
4589 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
4590 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
4591 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
4592 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
4593 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
4594 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
4595 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
4596 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
4597 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
4598 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
4599 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
4600 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
4601 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
4602 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
4603 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
4604 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
4605 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
4606 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4607 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4608 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4609 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4610 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4611 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4612 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4613 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4614 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
4615 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
4616 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
4617 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
4618 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
4619 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
4620 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
4621 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
4622 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
4623 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
4624 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
4625 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
4626 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
4627 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
4628 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
4629 [bh2]: https://github.com/rust-lang/rust/pull/28156
4630 [binfat]: https://github.com/rust-lang/rust/pull/28270
4631 [bm]: https://github.com/rust-lang/rust/pull/28197
4632 [cc]: https://github.com/rust-lang/rust/pull/27531
4633 [crlf]: https://github.com/rust-lang/rust/pull/28034
4634 [cu]: https://github.com/rust-lang/cargo/pull/1931
4635 [d]: https://github.com/rust-lang/rust/pull/27825
4636 [dep]: https://github.com/rust-lang/rust/pull/28339
4637 [es]: https://github.com/rust-lang/rust/pull/27956
4638 [ext]: https://github.com/rust-lang/rust/pull/28094
4639 [faststr]: https://github.com/rust-lang/rust/pull/28338
4640 [ffi]: https://github.com/rust-lang/rust/pull/28779
4641 [fp]: https://github.com/rust-lang/rust/pull/28268
4642 [fp2]: https://github.com/rust-lang/rust/pull/28560
4643 [fp3]: https://github.com/rust-lang/rust/pull/27307
4644 [i]: https://github.com/rust-lang/rust/pull/27451
4645 [into2]: https://github.com/rust-lang/rust/pull/28039
4646 [it]: https://github.com/rust-lang/rust/pull/27652
4647 [mm]: https://github.com/rust-lang/rust/pull/27338
4648 [mutw]: https://github.com/rust-lang/rust/pull/28368
4649 [sound]: https://github.com/rust-lang/rust/pull/27641
4650 [p]: https://github.com/rust-lang/rust/pull/27866
4651 [pec]: https://github.com/rust-lang/rust/pull/28486
4652 [pr]: https://github.com/rust-lang/rust/pull/27896
4653 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4654 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4655 [s]: https://github.com/rust-lang/rust/pull/27474
4656 [stab]: https://github.com/rust-lang/rust/pull/28339
4657 [stat]: https://github.com/rust-lang/rust/pull/28321
4658 [vd]: https://github.com/rust-lang/rust/pull/28494
4660 Version 1.3.0 (2015-09-17)
4661 ==============================
4663 * ~900 changes, numerous bugfixes
4668 * The [new object lifetime defaults][nold] have been [turned
4669 on][nold2] after a cycle of warnings about the change. Now types
4670 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
4671 being interpreted as `&'a Box<Trait+'a>` to `&'a
4672 Box<Trait+'static>`.
4673 * [The Rustonomicon][nom] is a new book in the official documentation
4674 that dives into writing unsafe Rust.
4675 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
4676 timekeeping is employed by other std APIs, as well as out-of-tree
4682 * The [new object lifetime defaults][nold] have been [turned
4683 on][nold2] after a cycle of warnings about the change.
4684 * There is a known [regression][lr] in how object lifetime elision is
4685 interpreted, the proper solution for which is undetermined.
4686 * The `#[prelude_import]` attribute, an internal implementation
4687 detail, was accidentally stabilized previously. [It has been put
4688 behind the `prelude_import` feature gate][pi]. This change is
4689 believed to break no existing code.
4690 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4691 [more sane for dynamically sized types][dst3]. Code that relied on
4692 the previous behavior is thought to be broken.
4693 * The `dropck` rules, which checks that destructors can't access
4694 destroyed values, [have been updated][dropck] to match the
4695 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
4696 cause some previously-compiling code to no longer build.
4701 * The [new object lifetime defaults][nold] have been [turned
4702 on][nold2] after a cycle of warnings about the change.
4703 * Semicolons may [now follow types and paths in
4704 macros](https://github.com/rust-lang/rust/pull/27000).
4705 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4706 [more sane for dynamically sized types][dst3]. Code that relied on
4707 the previous behavior is not known to exist, and suspected to be
4709 * `'static` variables [may now be recursive][st].
4710 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
4711 implementations correctly.
4712 * The `dropck` rules, which checks that destructors can't access
4713 destroyed values, [have been updated][dropck] to match the
4719 * The [`Duration`] API, [has been stabilized][ds], as well as the
4720 `std::time` module, which presently contains only `Duration`.
4721 * `Box<str>` and `Box<[T]>` both implement `Clone`.
4722 * The owned C string, [`CString`], implements [`Borrow`] and the
4723 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
4724 these allow C strings to be borrowed and cloned in generic code.
4725 * [`CStr`] implements [`Debug`].
4726 * [`AtomicPtr`] implements [`Debug`].
4727 * [`Error`] trait objects [can be downcast to their concrete types][e]
4728 in many common configurations, using the [`is`], [`downcast`],
4729 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
4731 * Searching for substrings now [employs the two-way algorithm][search]
4732 instead of doing a naive search. This gives major speedups to a
4733 number of methods, including [`contains`][sc], [`find`][sf],
4734 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
4735 [`ends_with`][sew] are also faster.
4736 * The performance of `PartialEq` for slices is [much faster][ps].
4737 * The [`Hash`] trait offers the default method, [`hash_slice`], which
4738 is overridden and optimized by the implementations for scalars.
4739 * The [`Hasher`] trait now has a number of specialized `write_*`
4740 methods for primitive types, for efficiency.
4741 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
4742 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
4743 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
4744 of [`std::error::Error::cause`][iec] also delegates to the inner
4746 * [`process::Child`][pc] gained the [`id`] method, which returns a
4747 `u32` representing the platform-specific process identifier.
4748 * The [`connect`] method on slices is deprecated, replaced by the new
4749 [`join`] method (note that both of these are on the *unstable*
4750 [`SliceConcatExt`] trait, but through the magic of the prelude are
4751 available to stable code anyway).
4752 * The [`Div`] operator is implemented for [`Wrapping`] types.
4753 * [`DerefMut` is implemented for `String`][dms].
4754 * Performance of SipHash (the default hasher for `HashMap`) is
4755 [better for long data][sh].
4756 * [`AtomicPtr`] implements [`Send`].
4757 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
4758 are now [specialized to use uninitialized buffers for increased
4760 * Lifetime parameters of foreign functions [are now resolved
4766 * Rust can now, with some coercion, [produce programs that run on
4767 Windows XP][xp], though XP is not considered a supported platform.
4768 * Porting Rust on Windows from the GNU toolchain to MSVC continues
4769 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
4770 recommended for use in 1.3, though should be fully-functional
4771 in the [64-bit 1.4 beta][b14].
4772 * On Fedora-based systems installation will [properly configure the
4773 dynamic linker][fl].
4774 * The compiler gained many new extended error descriptions, which can
4775 be accessed with the `--explain` flag.
4776 * The `dropck` pass, which checks that destructors can't access
4777 destroyed values, [has been rewritten][dropck]. This fixes some
4778 soundness holes, and as such will cause some previously-compiling
4779 code to no longer build.
4780 * `rustc` now uses [LLVM to write archive files where possible][ar].
4781 Eventually this will eliminate the compiler's dependency on the ar
4783 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
4784 supported FreeBSD on x86_64).
4785 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
4786 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
4788 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
4789 will kill the process instead of leaking][nlp].
4791 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
4792 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
4793 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
4794 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
4795 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
4796 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4797 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4798 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
4799 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
4800 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
4801 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
4802 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
4803 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
4804 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4805 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
4806 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
4807 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
4808 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
4809 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4810 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
4811 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
4812 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
4813 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
4814 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4815 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
4816 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
4817 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
4818 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
4819 [ar]: https://github.com/rust-lang/rust/pull/26926
4820 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
4821 [dms]: https://github.com/rust-lang/rust/pull/26241
4822 [dropck]: https://github.com/rust-lang/rust/pull/27261
4823 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4824 [ds]: https://github.com/rust-lang/rust/pull/26818
4825 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
4826 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
4827 [dst3]: https://github.com/rust-lang/rust/pull/27351
4828 [e]: https://github.com/rust-lang/rust/pull/24793
4829 [f]: https://github.com/rust-lang/rust/pull/26588
4830 [fb]: https://github.com/rust-lang/rust/pull/26959
4831 [fl]: https://github.com/rust-lang/rust-installer/pull/41
4832 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4833 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
4834 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
4835 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
4836 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
4837 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
4838 [lic]: https://github.com/rust-lang/rust/pull/26583
4839 [lnu]: https://github.com/rust-lang/rust/pull/27026
4840 [lr]: https://github.com/rust-lang/rust/issues/27248
4841 [lum]: https://github.com/rust-lang/rust/pull/26378
4842 [lur]: https://github.com/rust-lang/rust/pull/26783
4843 [nlp]: https://github.com/rust-lang/rust/pull/27176
4844 [nold2]: https://github.com/rust-lang/rust/pull/27045
4845 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
4846 [nom]: http://doc.rust-lang.org/nightly/nomicon/
4847 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
4848 [pi]: https://github.com/rust-lang/rust/pull/26699
4849 [ps]: https://github.com/rust-lang/rust/pull/26884
4850 [rte]: https://github.com/rust-lang/rust/pull/26950
4851 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
4852 [search]: https://github.com/rust-lang/rust/pull/26327
4853 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
4854 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
4855 [sh]: https://github.com/rust-lang/rust/pull/27280
4856 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
4857 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
4858 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
4859 [st]: https://github.com/rust-lang/rust/pull/26630
4860 [win1]: https://github.com/rust-lang/rust/pull/26569
4861 [win2]: https://github.com/rust-lang/rust/pull/26741
4862 [win3]: https://github.com/rust-lang/rust/pull/26741
4863 [win4]: https://github.com/rust-lang/rust/pull/27210
4864 [xp]: https://github.com/rust-lang/rust/pull/26569
4866 Version 1.2.0 (2015-08-07)
4867 ==========================
4869 * ~1200 changes, numerous bugfixes
4874 * [Dynamically-sized-type coercions][dst] allow smart pointer types
4875 like `Rc` to contain types without a fixed size, arrays and trait
4876 objects, finally enabling use of `Rc<[T]>` and completing the
4877 implementation of DST.
4878 * [Parallel codegen][parcodegen] is now working again, which can
4879 substantially speed up large builds in debug mode; It also gets
4880 another ~33% speedup when bootstrapping on a 4 core machine (using 8
4881 jobs). It's not enabled by default, but will be "in the near
4882 future". It can be activated with the `-C codegen-units=N` flag to
4884 * This is the first release with [experimental support for linking
4885 with the MSVC linker and lib C on Windows (instead of using the GNU
4886 variants via MinGW)][win]. It is yet recommended only for the most
4887 intrepid Rustaceans.
4888 * Benchmark compilations are showing a 30% improvement in
4889 bootstrapping over 1.1.
4894 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
4895 unicode case mapping, which is a previously-planned change in
4896 behavior and considered a bugfix.
4897 * [`mem::align_of`] now specifies [the *minimum alignment* for
4898 T][align], which is usually the alignment programs are interested
4899 in, and the same value reported by clang's
4900 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
4902 * [The `#[packed]` attribute is no longer silently accepted by the
4903 compiler][packed]. This attribute did nothing and code that
4904 mentioned it likely did not work as intended.
4905 * Associated type defaults are [now behind the
4906 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
4907 defaults *did not work*, but could be mentioned syntactically. As
4908 such this breakage has minimal impact.
4913 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
4914 matching against dereferenceable values.
4919 * The [`Extend`] trait, which grows a collection from an iterator, is
4920 implemented over iterators of references, for `String`, `Vec`,
4921 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
4922 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
4923 * The [`iter::once`] function returns an iterator that yields a single
4924 element, and [`iter::empty`] returns an iterator that yields no
4926 * The [`matches`] and [`rmatches`] methods on `str` return iterators
4927 over substring matches.
4928 * [`Cell`] and [`RefCell`] both implement `Eq`.
4929 * A number of methods for wrapping arithmetic are added to the
4930 integral types, [`wrapping_div`], [`wrapping_rem`],
4931 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
4932 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
4933 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
4934 type.. It is illegal for the default arithmetic operations in Rust
4935 to overflow; the desire to wrap must be explicit.
4936 * The `{:#?}` formatting specifier [displays the alternate,
4937 pretty-printed][debugfmt] form of the `Debug` formatter. This
4938 feature was actually introduced prior to 1.0 with little
4940 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
4941 for writing data to formatted strings, similar to [`io::Write`].
4942 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
4943 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
4944 are used by code generators to emit implementations of [`Debug`].
4945 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
4946 methods that convert case, following Unicode case mapping.
4947 * It is now easier to handle poisoned locks. The [`PoisonError`]
4948 type, returned by failing lock operations, exposes `into_inner`,
4949 `get_ref`, and `get_mut`, which all give access to the inner lock
4950 guard, and allow the poisoned lock to continue to operate. The
4951 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
4952 poisoned lock without attempting to take the lock.
4953 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
4954 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
4955 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
4956 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
4958 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
4964 * `rustc` employs smarter heuristics for guessing at [typos].
4965 * `rustc` emits more efficient code for [no-op conversions between
4966 unsafe pointers][nop].
4967 * Fat pointers are now [passed in pairs of immediate arguments][fat],
4968 resulting in faster compile times and smaller code.
4970 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
4971 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4972 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
4973 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
4974 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
4975 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
4976 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
4977 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
4978 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
4979 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
4980 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
4981 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
4982 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
4983 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
4984 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
4985 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
4986 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4987 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
4988 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
4989 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
4990 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
4991 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
4992 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
4993 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
4994 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
4995 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4996 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
4997 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
4998 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
4999 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
5000 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
5001 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
5002 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
5003 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
5004 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
5005 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
5006 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
5007 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
5008 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
5009 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
5010 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
5011 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
5012 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
5013 [align]: https://github.com/rust-lang/rust/pull/25646
5014 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
5015 [typos]: https://github.com/rust-lang/rust/pull/26087
5016 [nop]: https://github.com/rust-lang/rust/pull/26336
5017 [fat]: https://github.com/rust-lang/rust/pull/26411
5018 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
5019 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
5020 [packed]: https://github.com/rust-lang/rust/pull/25541
5021 [ad]: https://github.com/rust-lang/rust/pull/27382
5022 [win]: https://github.com/rust-lang/rust/pull/25350
5024 Version 1.1.0 (2015-06-25)
5025 =========================
5027 * ~850 changes, numerous bugfixes
5032 * The [`std::fs` module has been expanded][fs] to expand the set of
5033 functionality exposed:
5034 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
5035 don't incur a syscall on some platforms.
5036 * A `symlink_metadata` function has been added.
5037 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
5038 access to all underlying information.
5039 * The compiler now contains extended explanations of many errors. When an error
5040 with an explanation occurs the compiler suggests using the `--explain` flag
5041 to read the explanation. Error explanations are also [available online][err-index].
5042 * Thanks to multiple [improvements][sk] to [type checking][pre], as
5043 well as other work, the time to bootstrap the compiler decreased by
5049 * The [`str::split_whitespace`] method splits a string on unicode
5050 whitespace boundaries.
5051 * On both Windows and Unix, new extension traits provide conversion of
5052 I/O types to and from the underlying system handles. On Unix, these
5053 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
5054 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
5055 `TcpListener`, and `UpdSocket`. Further implementations for
5056 `std::process` will be stabilized later.
5057 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
5058 Windows, symlinks can be created with
5059 `std::os::windows::symlink_dir` and
5060 `std::os::windows::symlink_file`.
5061 * The `mpsc::Receiver` type can now be converted into an iterator with
5062 `into_iter` on the [`IntoIterator`] trait.
5063 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
5064 implementation of the [`From`] trait.
5065 * The `Debug` implementation for `RangeFull` [creates output that is
5066 more consistent with other implementations][rf].
5067 * [`Debug` is implemented for `File`][file].
5068 * The `Default` implementation for `Arc` [no longer requires `Sync +
5070 * [The `Iterator` methods `count`, `nth`, and `last` have been
5071 overridden for slices to have O(1) performance instead of O(n)][si].
5072 * Incorrect handling of paths on Windows has been improved in both the
5073 compiler and the standard library.
5074 * [`AtomicPtr` gained a `Default` implementation][ap].
5075 * In accordance with Rust's policy on arithmetic overflow `abs` now
5076 [panics on overflow when debug assertions are enabled][abs].
5077 * The [`Cloned`] iterator, which was accidentally left unstable for
5078 1.0 [has been stabilized][c].
5079 * The [`Incoming`] iterator, which iterates over incoming TCP
5080 connections, and which was accidentally unnamable in 1.0, [is now
5081 properly exported][inc].
5082 * [`BinaryHeap`] no longer corrupts itself [when functions called by
5083 `sift_up` or `sift_down` panic][bh].
5084 * The [`split_off`] method of `LinkedList` [no longer corrupts
5085 the list in certain scenarios][ll].
5090 * Type checking performance [has improved notably][sk] with
5091 [multiple improvements][pre].
5092 * The compiler [suggests code changes][ch] for more errors.
5093 * rustc and it's build system have experimental support for [building
5094 toolchains against MUSL][m] instead of glibc on Linux.
5095 * The compiler defines the `target_env` cfg value, which is used for
5096 distinguishing toolchains that are otherwise for the same
5097 platform. Presently this is set to `gnu` for common GNU Linux
5098 targets and for MinGW targets, and `musl` for MUSL Linux targets.
5099 * The [`cargo rustc`][crc] command invokes a build with custom flags
5101 * [Android executables are always position independent][pie].
5102 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
5105 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
5106 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
5107 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
5108 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
5109 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
5110 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
5111 [rf]: https://github.com/rust-lang/rust/pull/24491
5112 [err-index]: https://doc.rust-lang.org/error-index.html
5113 [sk]: https://github.com/rust-lang/rust/pull/24615
5114 [pre]: https://github.com/rust-lang/rust/pull/25323
5115 [file]: https://github.com/rust-lang/rust/pull/24598
5116 [ch]: https://github.com/rust-lang/rust/pull/24683
5117 [arc]: https://github.com/rust-lang/rust/pull/24695
5118 [si]: https://github.com/rust-lang/rust/pull/24701
5119 [ap]: https://github.com/rust-lang/rust/pull/24834
5120 [m]: https://github.com/rust-lang/rust/pull/24777
5121 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
5122 [crc]: https://github.com/rust-lang/cargo/pull/1568
5123 [pie]: https://github.com/rust-lang/rust/pull/24953
5124 [abs]: https://github.com/rust-lang/rust/pull/25441
5125 [c]: https://github.com/rust-lang/rust/pull/25496
5126 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
5127 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
5128 [inc]: https://github.com/rust-lang/rust/pull/25522
5129 [bh]: https://github.com/rust-lang/rust/pull/25856
5130 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
5131 [ll]: https://github.com/rust-lang/rust/pull/26022
5132 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
5133 [drop]: https://github.com/rust-lang/rust/pull/24935
5135 Version 1.0.0 (2015-05-15)
5136 ========================
5138 * ~1500 changes, numerous bugfixes
5143 * The vast majority of the standard library is now `#[stable]`. It is
5144 no longer possible to use unstable features with a stable build of
5146 * Many popular crates on [crates.io] now work on the stable release
5148 * Arithmetic on basic integer types now [checks for overflow in debug
5154 * Several [restrictions have been added to trait coherence][coh] in
5155 order to make it easier for upstream authors to change traits
5156 without breaking downstream code.
5157 * Digits of binary and octal literals are [lexed more eagerly][lex] to
5158 improve error messages and macro behavior. For example, `0b1234` is
5159 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
5160 * Trait bounds [are always invariant][inv], eliminating the need for
5161 the `PhantomFn` and `MarkerTrait` lang items, which have been
5163 * ["-" is no longer a valid character in crate names][cr], the `extern crate
5164 "foo" as bar` syntax has been replaced with `extern crate foo as
5165 bar`, and Cargo now automatically translates "-" in *package* names
5166 to underscore for the crate name.
5167 * [Lifetime shadowing is an error][lt].
5168 * [`Send` no longer implies `'static`][send-rfc].
5169 * [UFCS now supports trait-less associated paths][moar-ufcs] like
5170 `MyType::default()`.
5171 * Primitive types [now have inherent methods][prim-inherent],
5172 obviating the need for extension traits like `SliceExt`.
5173 * Methods with `Self: Sized` in their `where` clause are [considered
5174 object-safe][self-sized], allowing many extension traits like
5175 `IteratorExt` to be merged into the traits they extended.
5176 * You can now [refer to associated types][assoc-where] whose
5177 corresponding trait bounds appear only in a `where` clause.
5178 * The final bits of [OIBIT landed][oibit-final], meaning that traits
5179 like `Send` and `Sync` are now library-defined.
5180 * A [Reflect trait][reflect] was introduced, which means that
5181 downcasting via the `Any` trait is effectively limited to concrete
5182 types. This helps retain the potentially-important "parametricity"
5183 property: generic code cannot behave differently for different type
5184 arguments except in minor ways.
5185 * The `unsafe_destructor` feature is now deprecated in favor of the
5186 [new `dropck`][dropck]. This change is a major reduction in unsafe
5192 * The `thread_local` module [has been renamed to `std::thread`][th].
5193 * The methods of `IteratorExt` [have been moved to the `Iterator`
5195 * Several traits that implement Rust's conventions for type
5196 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
5197 [centralized in the `std::convert` module][con].
5198 * The `FromError` trait [was removed in favor of `From`][fe].
5199 * The basic sleep function [has moved to
5200 `std::thread::sleep_ms`][slp].
5201 * The `splitn` function now takes an `n` parameter that represents the
5202 number of items yielded by the returned iterator [instead of the
5203 number of 'splits'][spl].
5204 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
5205 * [Derived implementations of `PartialOrd` now order enums according
5206 to their explicitly-assigned discriminants][po].
5207 * [Methods for searching strings are generic over `Pattern`s][pat],
5208 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
5210 * [In method resolution, object methods are resolved before inherent
5212 * [`String::from_str` has been deprecated in favor of the `From` impl,
5213 `String::from`][sf].
5214 * [`io::Error` implements `Sync`][ios].
5215 * [The `words` method on `&str` has been replaced with
5216 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
5218 * The new path and IO modules are complete and `#[stable]`. This
5219 was the major library focus for this cycle.
5220 * The path API was [revised][path-normalize] to normalize `.`,
5221 adjusting the tradeoffs in favor of the most common usage.
5222 * A large number of remaining APIs in `std` were also stabilized
5223 during this cycle; about 75% of the non-deprecated API surface
5225 * The new [string pattern API][string-pattern] landed, which makes
5226 the string slice API much more internally consistent and flexible.
5227 * A new set of [generic conversion traits][conversion] replaced
5228 many existing ad hoc traits.
5229 * Generic numeric traits were [completely removed][num-traits]. This
5230 was made possible thanks to inherent methods for primitive types,
5231 and the removal gives maximal flexibility for designing a numeric
5232 hierarchy in the future.
5233 * The `Fn` traits are now related via [inheritance][fn-inherit]
5234 and provide ergonomic [blanket implementations][fn-blanket].
5235 * The `Index` and `IndexMut` traits were changed to
5236 [take the index by value][index-value], enabling code like
5237 `hash_map["string"]` to work.
5238 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
5239 `Copy` data is known to be `Clone` as well.
5244 * Many errors now have extended explanations that can be accessed with
5245 the `--explain` flag to `rustc`.
5246 * Many new examples have been added to the standard library
5248 * rustdoc has received a number of improvements focused on completion
5250 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
5251 * Much headway was made on ecosystem-wide CI, making it possible
5252 to [compare builds for breakage][ci-compare].
5255 [crates.io]: http://crates.io
5256 [clo]: https://github.com/rust-lang/rust/pull/24034
5257 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
5258 [con]: https://github.com/rust-lang/rust/pull/23875
5259 [cr]: https://github.com/rust-lang/rust/pull/23419
5260 [fe]: https://github.com/rust-lang/rust/pull/23879
5261 [ie]: https://github.com/rust-lang/rust/pull/23300
5262 [inv]: https://github.com/rust-lang/rust/pull/23938
5263 [ios]: https://github.com/rust-lang/rust/pull/24133
5264 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
5265 [lt]: https://github.com/rust-lang/rust/pull/24057
5266 [meth]: https://github.com/rust-lang/rust/pull/24056
5267 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
5268 [po]: https://github.com/rust-lang/rust/pull/24270
5269 [sf]: https://github.com/rust-lang/rust/pull/24517
5270 [slp]: https://github.com/rust-lang/rust/pull/23949
5271 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
5272 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
5273 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
5274 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
5275 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
5276 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
5277 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
5278 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
5279 [self-sized]: https://github.com/rust-lang/rust/pull/22301
5280 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
5281 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
5282 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
5283 [reflect]: https://github.com/rust-lang/rust/pull/23712
5284 [conversion]: https://github.com/rust-lang/rfcs/pull/529
5285 [num-traits]: https://github.com/rust-lang/rust/pull/23549
5286 [index-value]: https://github.com/rust-lang/rust/pull/23601
5287 [dropck]: https://github.com/rust-lang/rfcs/pull/769
5288 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
5289 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
5290 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
5291 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
5292 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
5295 Version 1.0.0-alpha.2 (2015-02-20)
5296 =====================================
5298 * ~1300 changes, numerous bugfixes
5302 * The various I/O modules were [overhauled][io-rfc] to reduce
5303 unnecessary abstractions and provide better interoperation with
5304 the underlying platform. The old `io` module remains temporarily
5306 * The standard library now [participates in feature gating][feat],
5307 so use of unstable libraries now requires a `#![feature(...)]`
5308 attribute. The impact of this change is [described on the
5309 forum][feat-forum]. [RFC][feat-rfc].
5313 * `for` loops [now operate on the `IntoIterator` trait][into],
5314 which eliminates the need to call `.iter()`, etc. to iterate
5315 over collections. There are some new subtleties to remember
5316 though regarding what sort of iterators various types yield, in
5317 particular that `for foo in bar { }` yields values from a move
5318 iterator, destroying the original collection. [RFC][into-rfc].
5319 * Objects now have [default lifetime bounds][obj], so you don't
5320 have to write `Box<Trait+'static>` when you don't care about
5321 storing references. [RFC][obj-rfc].
5322 * In types that implement `Drop`, [lifetimes must outlive the
5323 value][drop]. This will soon make it possible to safely
5324 implement `Drop` for types where `#[unsafe_destructor]` is now
5325 required. Read the [gorgeous RFC][drop-rfc] for details.
5326 * The fully qualified <T as Trait>::X syntax lets you set the Self
5327 type for a trait method or associated type. [RFC][ufcs-rfc].
5328 * References to types that implement `Deref<U>` now [automatically
5329 coerce to references][deref] to the dereferenced type `U`,
5330 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
5331 should eliminate many unsightly uses of `&*`, as when converting
5332 from references to vectors into references to
5333 slices. [RFC][deref-rfc].
5334 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
5335 `|:|`) is obsolete and closure kind is inferred from context.
5336 * [`Self` is a keyword][Self].
5340 * The `Show` and `String` formatting traits [have been
5341 renamed][fmt] to `Debug` and `Display` to more clearly reflect
5342 their related purposes. Automatically getting a string
5343 conversion to use with `format!("{:?}", something_to_debug)` is
5344 now written `#[derive(Debug)]`.
5345 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
5346 OsStr}`, provide strings in platform-specific encodings for easier
5347 interop with system APIs. [RFC][osstr-rfc].
5348 * The `boxed::into_raw` and `Box::from_raw` functions [convert
5349 between `Box<T>` and `*mut T`][boxraw], a common pattern for
5350 creating raw pointers.
5354 * Certain long error messages of the form 'expected foo found bar'
5355 are now [split neatly across multiple
5356 lines][multiline]. Examples in the PR.
5357 * On Unix Rust can be [uninstalled][un] by running
5358 `/usr/local/lib/rustlib/uninstall.sh`.
5359 * The `#[rustc_on_unimplemented]` attribute, requiring the
5360 'on_unimplemented' feature, lets rustc [display custom error
5361 messages when a trait is expected to be implemented for a type
5366 * Rust is tested against a [LALR grammar][lalr], which parses
5367 almost all the Rust files that rustc does.
5369 [boxraw]: https://github.com/rust-lang/rust/pull/21318
5370 [close]: https://github.com/rust-lang/rust/pull/21843
5371 [deref]: https://github.com/rust-lang/rust/pull/21351
5372 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
5373 [drop]: https://github.com/rust-lang/rust/pull/21972
5374 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
5375 [feat]: https://github.com/rust-lang/rust/pull/21248
5376 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
5377 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
5378 [fmt]: https://github.com/rust-lang/rust/pull/21457
5379 [into]: https://github.com/rust-lang/rust/pull/20790
5380 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
5381 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5382 [lalr]: https://github.com/rust-lang/rust/pull/21452
5383 [multiline]: https://github.com/rust-lang/rust/pull/19870
5384 [obj]: https://github.com/rust-lang/rust/pull/22230
5385 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
5386 [onun]: https://github.com/rust-lang/rust/pull/20889
5387 [osstr]: https://github.com/rust-lang/rust/pull/21488
5388 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5389 [Self]: https://github.com/rust-lang/rust/pull/22158
5390 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
5391 [un]: https://github.com/rust-lang/rust/pull/22256
5394 Version 1.0.0-alpha (2015-01-09)
5395 ==================================
5397 * ~2400 changes, numerous bugfixes
5401 * The language itself is considered feature complete for 1.0,
5402 though there will be many usability improvements and bugfixes
5403 before the final release.
5404 * Nearly 50% of the public API surface of the standard library has
5405 been declared 'stable'. Those interfaces are unlikely to change
5407 * The long-running debate over integer types has been
5408 [settled][ints]: Rust will ship with types named `isize` and
5409 `usize`, rather than `int` and `uint`, for pointer-sized
5410 integers. Guidelines will be rolled out during the alpha cycle.
5411 * Most crates that are not `std` have been moved out of the Rust
5412 distribution into the Cargo ecosystem so they can evolve
5413 separately and don't need to be stabilized as quickly, including
5414 'time', 'getopts', 'num', 'regex', and 'term'.
5415 * Documentation continues to be expanded with more API coverage, more
5416 examples, and more in-depth explanations. The guides have been
5417 consolidated into [The Rust Programming Language][trpl].
5418 * "[Rust By Example][rbe]" is now maintained by the Rust team.
5419 * All official Rust binary installers now come with [Cargo], the
5420 Rust package manager.
5424 * Closures have been [completely redesigned][unboxed] to be
5425 implemented in terms of traits, can now be used as generic type
5426 bounds and thus monomorphized and inlined, or via an opaque
5427 pointer (boxed) as in the old system. The new system is often
5428 referred to as 'unboxed' closures.
5429 * Traits now support [associated types][assoc], allowing families
5430 of related types to be defined together and used generically in
5432 * Enum variants are [namespaced by their type names][enum].
5433 * [`where` clauses][where] provide a more versatile and attractive
5434 syntax for specifying generic bounds, though the previous syntax
5436 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
5438 * Rust [no longer has a runtime][rt] of any description, and only
5439 supports OS threads, not green threads.
5440 * At long last, Rust has been overhauled for 'dynamically-sized
5441 types' ([DST]), which integrates 'fat pointers' (object types,
5442 arrays, and `str`) more deeply into the type system, making it
5444 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
5445 `..j` that produce range types and which, when combined with the
5446 `Index` operator and multidispatch, leads to a convenient slice
5448 * The new range syntax revealed an ambiguity in the fixed-length
5449 array syntax, so now fixed length arrays [are written `[T;
5451 * The `Copy` trait is no longer implemented automatically. Unsafe
5452 pointers no longer implement `Sync` and `Send` so types
5453 containing them don't automatically either. `Sync` and `Send`
5454 are now 'unsafe traits' so one can "forcibly" implement them via
5455 `unsafe impl` if a type confirms to the requirements for them
5456 even though the internals do not (e.g. structs containing unsafe
5457 pointers like `Arc`). These changes are intended to prevent some
5458 footguns and are collectively known as [opt-in built-in
5459 traits][oibit] (though `Sync` and `Send` will soon become pure
5460 library types unknown to the compiler).
5461 * Operator traits now take their operands [by value][ops], and
5462 comparison traits can use multidispatch to compare one type
5463 against multiple other types, allowing e.g. `String` to be
5464 compared with `&str`.
5465 * `if let` and `while let` are no longer feature-gated.
5466 * Rust has adopted a more [uniform syntax for escaping unicode
5467 characters][unicode].
5468 * `macro_rules!` [has been declared stable][mac]. Though it is a
5469 flawed system it is sufficiently popular that it must be usable
5470 for 1.0. Effort has gone into [future-proofing][mac-future] it
5471 in ways that will allow other macro systems to be developed in
5472 parallel, and won't otherwise impact the evolution of the
5474 * The prelude has been [pared back significantly][prelude] such
5475 that it is the minimum necessary to support the most pervasive
5476 code patterns, and through [generalized where clauses][where]
5477 many of the prelude extension traits have been consolidated.
5478 * Rust's rudimentary reflection [has been removed][refl], as it
5479 incurred too much code generation for little benefit.
5480 * [Struct variants][structvars] are no longer feature-gated.
5481 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
5482 known as 'higher-ranked trait bounds', this crucially allows
5483 unboxed closures to work.
5484 * Macros invocations surrounded by parens or square brackets and
5485 not terminated by a semicolon are [parsed as
5486 expressions][macros], which makes expressions like `vec![1i32,
5487 2, 3].len()` work as expected.
5488 * Trait objects now implement their traits automatically, and
5489 traits that can be coerced to objects now must be [object
5491 * Automatically deriving traits is now done with `#[derive(...)]`
5492 not `#[deriving(...)]` for [consistency with other naming
5493 conventions][derive].
5494 * Importing the containing module or enum at the same time as
5495 items or variants they contain is [now done with `self` instead
5496 of `mod`][self], as in use `foo::{self, bar}`
5497 * Glob imports are no longer feature-gated.
5498 * The `box` operator and `box` patterns have been feature-gated
5499 pending a redesign. For now unique boxes should be allocated
5500 like other containers, with `Box::new`.
5504 * A [series][coll1] of [efforts][coll2] to establish
5505 [conventions][coll3] for collections types has resulted in API
5506 improvements throughout the standard library.
5507 * New [APIs for error handling][err] provide ergonomic interop
5508 between error types, and [new conventions][err-conv] describe
5509 more clearly the recommended error handling strategies in Rust.
5510 * The `fail!` macro has been renamed to [`panic!`][panic] so that
5511 it is easier to discuss failure in the context of error handling
5512 without making clarifications as to whether you are referring to
5513 the 'fail' macro or failure more generally.
5514 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
5515 syscall when available.
5516 * The 'serialize' crate has been renamed 'rustc-serialize' and
5517 moved out of the distribution to Cargo. Although it is widely
5518 used now, it is expected to be superseded in the near future.
5519 * The `Show` formatter, typically implemented with
5520 `#[derive(Show)]` is [now requested with the `{:?}`
5521 specifier][show] and is intended for use by all types, for uses
5522 such as `println!` debugging. The new `String` formatter must be
5523 implemented by hand, uses the `{}` specifier, and is intended
5524 for full-fidelity conversions of things that can logically be
5525 represented as strings.
5529 * [Flexible target specification][flex] allows rustc's code
5530 generation to be configured to support otherwise-unsupported
5532 * Rust comes with rust-gdb and rust-lldb scripts that launch their
5533 respective debuggers with Rust-appropriate pretty-printing.
5534 * The Windows installation of Rust is distributed with the
5535 MinGW components currently required to link binaries on that
5540 * Nullable enum optimizations have been extended to more types so
5541 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
5542 space than the inner types themselves.
5543 * Work has begun on supporting AArch64.
5545 [Cargo]: https://crates.io
5546 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
5547 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
5548 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
5549 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
5550 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
5551 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
5552 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
5553 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
5554 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
5555 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
5556 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
5557 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
5558 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
5559 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
5560 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
5561 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
5562 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
5563 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
5564 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
5565 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
5566 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
5567 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
5568 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
5569 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
5570 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
5571 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
5572 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
5573 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
5574 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
5575 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
5576 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
5577 [trpl]: https://doc.rust-lang.org/book/index.html
5578 [rbe]: http://rustbyexample.com/
5581 Version 0.12.0 (2014-10-09)
5582 =============================
5584 * ~1900 changes, numerous bugfixes
5588 * The introductory documentation (now called The Rust Guide) has
5589 been completely rewritten, as have a number of supplementary
5591 * Rust's package manager, Cargo, continues to improve and is
5592 sometimes considered to be quite awesome.
5593 * Many API's in `std` have been reviewed and updated for
5594 consistency with the in-development Rust coding
5595 guidelines. The standard library documentation tracks
5596 stabilization progress.
5597 * Minor libraries have been moved out-of-tree to the rust-lang org
5598 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
5599 be installed with Cargo.
5600 * Lifetime elision allows lifetime annotations to be left off of
5601 function declarations in many common scenarios.
5602 * Rust now works on 64-bit Windows.
5605 * Indexing can be overloaded with the `Index` and `IndexMut`
5607 * The `if let` construct takes a branch only if the `let` pattern
5608 matches, currently behind the 'if_let' feature gate.
5609 * 'where clauses', a more flexible syntax for specifying trait
5610 bounds that is more aesthetic, have been added for traits and
5611 free functions. Where clauses will in the future make it
5612 possible to constrain associated types, which would be
5613 impossible with the existing syntax.
5614 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
5615 the 'slicing_syntax' feature gate, and can be overloaded with
5616 the `Slice` or `SliceMut` traits.
5617 * The syntax for matching of sub-slices has been changed to use a
5618 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
5619 consistency with other uses of `..` and to future-proof
5620 potential additional uses of the syntax.
5621 * The syntax for matching inclusive ranges in patterns has changed
5622 from `0..3` to `0...4` to be consistent with the exclusive range
5624 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
5625 c]`) has been put behind the 'advanced_slice_patterns' feature
5626 gate and may be removed in the future.
5627 * Components of tuples and tuple structs can be extracted using
5628 the `value.0` syntax, currently behind the `tuple_indexing`
5630 * The `#[crate_id]` attribute is no longer supported; versioning
5631 is handled by the package manager.
5632 * Renaming crate imports are now written `extern crate foo as bar`
5633 instead of `extern crate bar = foo`.
5634 * Renaming use statements are now written `use foo as bar` instead
5636 * `let` and `match` bindings and argument names in macros are now
5638 * The new, more efficient, closure types ('unboxed closures') have
5639 been added under a feature gate, 'unboxed_closures'. These will
5640 soon replace the existing closure types, once higher-ranked
5641 trait lifetimes are added to the language.
5642 * `move` has been added as a keyword, for indicating closures
5643 that capture by value.
5644 * Mutation and assignment is no longer allowed in pattern guards.
5645 * Generic structs and enums can now have trait bounds.
5646 * The `Share` trait is now called `Sync` to free up the term
5647 'shared' to refer to 'shared reference' (the default reference
5649 * Dynamically-sized types have been mostly implemented,
5650 unifying the behavior of fat-pointer types with the rest of the
5652 * As part of dynamically-sized types, the `Sized` trait has been
5653 introduced, which qualifying types implement by default, and
5654 which type parameters expect by default. To specify that a type
5655 parameter does not need to be sized, write `<Sized? T>`. Most
5656 types are `Sized`, notable exceptions being unsized arrays
5657 (`[T]`) and trait types.
5658 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
5659 * Lifetime bounds can now be applied to type parameters and object
5661 * The old, reference counted GC type, `Gc<T>` which was once
5662 denoted by the `@` sigil, has finally been removed. GC will be
5663 revisited in the future.
5666 * Library documentation has been improved for a number of modules.
5667 * Bit-vectors, collections::bitv has been modernized.
5668 * The url crate is deprecated in favor of
5669 http://github.com/servo/rust-url, which can be installed with
5671 * Most I/O stream types can be cloned and subsequently closed from
5673 * A `std::time::Duration` type has been added for use in I/O
5674 methods that rely on timers, as well as in the 'time' crate's
5675 `Timespec` arithmetic.
5676 * The runtime I/O abstraction layer that enabled the green thread
5677 scheduler to do non-thread-blocking I/O has been removed, along
5678 with the libuv-based implementation employed by the green thread
5679 scheduler. This will greatly simplify the future I/O work.
5680 * `collections::btree` has been rewritten to have a more
5681 idiomatic and efficient design.
5684 * rustdoc output now indicates the stability levels of API's.
5685 * The `--crate-name` flag can specify the name of the crate
5686 being compiled, like `#[crate_name]`.
5687 * The `-C metadata` specifies additional metadata to hash into
5688 symbol names, and `-C extra-filename` specifies additional
5689 information to put into the output filename, for use by the
5690 package manager for versioning.
5691 * debug info generation has continued to improve and should be
5692 more reliable under both gdb and lldb.
5693 * rustc has experimental support for compiling in parallel
5694 using the `-C codegen-units` flag.
5695 * rustc no longer encodes rpath information into binaries by
5699 * Stack usage has been optimized with LLVM lifetime annotations.
5700 * Official Rust binaries on Linux are more compatible with older
5701 kernels and distributions, built on CentOS 5.10.
5704 Version 0.11.0 (2014-07-02)
5705 ==========================
5707 * ~1700 changes, numerous bugfixes
5710 * ~[T] has been removed from the language. This type is superseded by
5712 * ~str has been removed from the language. This type is superseded by
5714 * ~T has been removed from the language. This type is superseded by the
5716 * @T has been removed from the language. This type is superseded by the
5717 standard library's std::gc::Gc<T> type.
5718 * Struct fields are now all private by default.
5719 * Vector indices and shift amounts are both required to be a `uint`
5720 instead of any integral type.
5721 * Byte character, byte string, and raw byte string literals are now all
5722 supported by prefixing the normal literal with a `b`.
5723 * Multiple ABIs are no longer allowed in an ABI string
5724 * The syntax for lifetimes on closures/procedures has been tweaked
5725 slightly: `<'a>|A, B|: 'b + K -> T`
5726 * Floating point modulus has been removed from the language; however it
5727 is still provided by a library implementation.
5728 * Private enum variants are now disallowed.
5729 * The `priv` keyword has been removed from the language.
5730 * A closure can no longer be invoked through a &-pointer.
5731 * The `use foo, bar, baz;` syntax has been removed from the language.
5732 * The transmute intrinsic no longer works on type parameters.
5733 * Statics now allow blocks/items in their definition.
5734 * Trait bounds are separated from objects with + instead of : now.
5735 * Objects can no longer be read while they are mutably borrowed.
5736 * The address of a static is now marked as insignificant unless the
5737 #[inline(never)] attribute is placed it.
5738 * The #[unsafe_destructor] attribute is now behind a feature gate.
5739 * Struct literals are no longer allowed in ambiguous positions such as
5740 if, while, match, and for..in.
5741 * Declaration of lang items and intrinsics are now feature-gated by
5743 * Integral literals no longer default to `int`, and floating point
5744 literals no longer default to `f64`. Literals must be suffixed with an
5745 appropriate type if inference cannot determine the type of the
5747 * The Box<T> type is no longer implicitly borrowed to &mut T.
5748 * Procedures are now required to not capture borrowed references.
5751 * The standard library is now a "facade" over a number of underlying
5752 libraries. This means that development on the standard library should
5753 be speedier due to smaller crates, as well as a clearer line between
5755 * A new library, libcore, lives under the standard library's facade
5756 which is Rust's "0-assumption" library, suitable for embedded and
5757 kernel development for example.
5758 * A regex crate has been added to the standard distribution. This crate
5759 includes statically compiled regular expressions.
5760 * The unwrap/unwrap_err methods on Result require a Show bound for
5761 better error messages.
5762 * The return types of the std::comm primitives have been centralized
5763 around the Result type.
5764 * A number of I/O primitives have gained the ability to time out their
5766 * A number of I/O primitives have gained the ability to close their
5767 reading/writing halves to cancel pending operations.
5768 * Reverse iterator methods have been removed in favor of `rev()` on
5769 their forward-iteration counterparts.
5770 * A bitflags! macro has been added to enable easy interop with C and
5771 management of bit flags.
5772 * A debug_assert! macro is now provided which is disabled when
5773 `--cfg ndebug` is passed to the compiler.
5774 * A graphviz crate has been added for creating .dot files.
5775 * The std::cast module has been migrated into std::mem.
5776 * The std::local_data api has been migrated from freestanding functions
5777 to being based on methods.
5778 * The Pod trait has been renamed to Copy.
5779 * jemalloc has been added as the default allocator for types.
5780 * The API for allocating memory has been changed to use proper alignment
5781 and sized deallocation
5782 * Connecting a TcpStream or binding a TcpListener is now based on a
5783 string address and a u16 port. This allows connecting to a hostname as
5785 * The Reader trait now contains a core method, read_at_least(), which
5786 correctly handles many repeated 0-length reads.
5787 * The process-spawning API is now centered around a builder-style
5789 * The :? printing qualifier has been moved from the standard library to
5790 an external libdebug crate.
5791 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
5792 have been renamed to Eq/Ord.
5793 * The select/plural methods have been removed from format!. The escapes
5794 for { and } have also changed from \{ and \} to {{ and }},
5796 * The TaskBuilder API has been re-worked to be a true builder, and
5797 extension traits for spawning native/green tasks have been added.
5800 * All breaking changes to the language or libraries now have their
5801 commit message annotated with `[breaking-change]` to allow for easy
5802 discovery of breaking changes.
5803 * The compiler will now try to suggest how to annotate lifetimes if a
5804 lifetime-related error occurs.
5805 * Debug info continues to be improved greatly with general bug fixes and
5806 better support for situations like link time optimization (LTO).
5807 * Usage of syntax extensions when cross-compiling has been fixed.
5808 * Functionality equivalent to GCC & Clang's -ffunction-sections,
5809 -fdata-sections and --gc-sections has been enabled by default
5810 * The compiler is now stricter about where it will load module files
5811 from when a module is declared via `mod foo;`.
5812 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
5813 Syntax extensions are now discovered via a "plugin registrar" type
5814 which will be extended in the future to other various plugins.
5815 * Lints have been restructured to allow for dynamically loadable lints.
5816 * A number of rustdoc improvements:
5817 * The HTML output has been visually redesigned.
5818 * Markdown is now powered by hoedown instead of sundown.
5819 * Searching heuristics have been greatly improved.
5820 * The search index has been reduced in size by a great amount.
5821 * Cross-crate documentation via `pub use` has been greatly improved.
5822 * Primitive types are now hyperlinked and documented.
5823 * Documentation has been moved from static.rust-lang.org/doc to
5825 * A new sandbox, play.rust-lang.org, is available for running and
5826 sharing rust code examples on-line.
5827 * Unused attributes are now more robustly warned about.
5828 * The dead_code lint now warns about unused struct fields.
5829 * Cross-compiling to iOS is now supported.
5830 * Cross-compiling to mipsel is now supported.
5831 * Stability attributes are now inherited by default and no longer apply
5832 to intra-crate usage, only inter-crate usage.
5833 * Error message related to non-exhaustive match expressions have been
5837 Version 0.10 (2014-04-03)
5838 =========================
5840 * ~1500 changes, numerous bugfixes
5843 * A new RFC process is now in place for modifying the language.
5844 * Patterns with `@`-pointers have been removed from the language.
5845 * Patterns with unique vectors (`~[T]`) have been removed from the
5847 * Patterns with unique strings (`~str`) have been removed from the
5849 * `@str` has been removed from the language.
5850 * `@[T]` has been removed from the language.
5851 * `@self` has been removed from the language.
5852 * `@Trait` has been removed from the language.
5853 * Headers on `~` allocations which contain `@` boxes inside the type for
5854 reference counting have been removed.
5855 * The semantics around the lifetimes of temporary expressions have changed,
5856 see #3511 and #11585 for more information.
5857 * Cross-crate syntax extensions are now possible, but feature gated. See
5858 #11151 for more information. This includes both `macro_rules!` macros as
5859 well as syntax extensions such as `format!`.
5860 * New lint modes have been added, and older ones have been turned on to be
5862 * Unnecessary parentheses
5865 * Uppercase variables
5866 * Publicly visible private types
5867 * `#[deriving]` with raw pointers
5868 * Unsafe functions can no longer be coerced to closures.
5869 * Various obscure macros such as `log_syntax!` are now behind feature gates.
5870 * The `#[simd]` attribute is now behind a feature gate.
5871 * Visibility is no longer allowed on `extern crate` statements, and
5872 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
5873 * Trailing commas are now allowed in argument lists and tuple patterns.
5874 * The `do` keyword has been removed, it is now a reserved keyword.
5875 * Default type parameters have been implemented, but are feature gated.
5876 * Borrowed variables through captures in closures are now considered soundly.
5877 * `extern mod` is now `extern crate`
5878 * The `Freeze` trait has been removed.
5879 * The `Share` trait has been added for types that can be shared among
5881 * Labels in macros are now hygienic.
5882 * Expression/statement macro invocations can be delimited with `{}` now.
5883 * Treatment of types allowed in `static mut` locations has been tweaked.
5884 * The `*` and `.` operators are now overloadable through the `Deref` and
5886 * `~Trait` and `proc` no longer have `Send` bounds by default.
5887 * Partial type hints are now supported with the `_` type marker.
5888 * An `Unsafe` type was introduced for interior mutability. It is now
5889 considered undefined to transmute from `&T` to `&mut T` without using the
5891 * The #[linkage] attribute was implemented for extern statics/functions.
5892 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
5893 * `Pod` was renamed to `Copy`.
5896 * The `libextra` library has been removed. It has now been decomposed into
5897 component libraries with smaller and more focused nuggets of
5898 functionality. The full list of libraries can be found on the
5899 documentation index page.
5900 * std: `std::condition` has been removed. All I/O errors are now propagated
5901 through the `Result` type. In order to assist with error handling, a
5902 `try!` macro for unwrapping errors with an early return and a lint for
5903 unused results has been added. See #12039 for more information.
5904 * std: The `vec` module has been renamed to `slice`.
5905 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
5906 This will become the only growable vector in the future.
5907 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
5908 are now found at `std::io::BufferedReader` instead of
5909 `std::io::buffered::BufferedReader`.
5910 * std: `print` and `println` are no longer in the prelude, the `print!` and
5911 `println!` macros are intended to be used instead.
5912 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
5913 attempts to statically prevent cycles.
5914 * std: The standard distribution is adopting the policy of pushing failure
5915 to the user rather than failing in libraries. Many functions (such as
5916 `slice::last()`) now return `Option<T>` instead of `T` + failing.
5917 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
5918 deriving mode: `#[deriving(Show)]`.
5919 * std: `ToStr` is now implemented for all types implementing `Show`.
5920 * std: The formatting trait methods now take `&self` instead of `&T`
5921 * std: The `invert()` method on iterators has been renamed to `rev()`
5922 * std: `std::num` has seen a reduction in the genericity of its traits,
5923 consolidating functionality into a few core traits.
5924 * std: Backtraces are now printed on task failure if the environment
5925 variable `RUST_BACKTRACE` is present.
5926 * std: Naming conventions for iterators have been standardized. More details
5927 can be found on the wiki's style guide.
5928 * std: `eof()` has been removed from the `Reader` trait. Specific types may
5929 still implement the function.
5930 * std: Networking types are now cloneable to allow simultaneous reads/writes.
5931 * std: `assert_approx_eq!` has been removed
5932 * std: The `e` and `E` formatting specifiers for floats have been added to
5933 print them in exponential notation.
5934 * std: The `Times` trait has been removed
5935 * std: Indications of variance and opting out of builtin bounds is done
5936 through marker types in `std::kinds::marker` now
5937 * std: `hash` has been rewritten, `IterBytes` has been removed, and
5938 `#[deriving(Hash)]` is now possible.
5939 * std: `SharedChan` has been removed, `Sender` is now cloneable.
5940 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
5941 * std: `Chan::new` is now `channel()`.
5942 * std: A new synchronous channel type has been implemented.
5943 * std: A `select!` macro is now provided for selecting over `Receiver`s.
5944 * std: `hashmap` and `trie` have been moved to `libcollections`
5945 * std: `run` has been rolled into `io::process`
5946 * std: `assert_eq!` now uses `{}` instead of `{:?}`
5947 * std: The equality and comparison traits have seen some reorganization.
5948 * std: `rand` has moved to `librand`.
5949 * std: `to_{lower,upper}case` has been implemented for `char`.
5950 * std: Logging has been moved to `liblog`.
5951 * collections: `HashMap` has been rewritten for higher performance and less
5953 * native: The default runtime is now `libnative`. If `libgreen` is desired,
5954 it can be booted manually. The runtime guide has more information and
5956 * native: All I/O functionality except signals has been implemented.
5957 * green: Task spawning with `libgreen` has been optimized with stack caching
5958 and various trimming of code.
5959 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
5960 * sync: The `extra::sync` module has been updated to modern rust (and moved
5961 to the `sync` library), tweaking and improving various interfaces while
5962 dropping redundant functionality.
5963 * sync: A new `Barrier` type has been added to the `sync` library.
5964 * sync: An efficient mutex for native and green tasks has been implemented.
5965 * serialize: The `base64` module has seen some improvement. It treats
5966 newlines better, has non-string error values, and has seen general
5968 * fourcc: A `fourcc!` macro was introduced
5969 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
5970 hexadecimal literal.
5973 * `rustpkg` has been deprecated and removed from the main repository. Its
5974 replacement, `cargo`, is under development.
5975 * Nightly builds of rust are now available
5976 * The memory usage of rustc has been improved many times throughout this
5978 * The build process supports disabling rpath support for the rustc binary
5980 * Code generation has improved in some cases, giving more information to the
5981 LLVM optimization passes to enable more extensive optimizations.
5982 * Debuginfo compatibility with lldb on OSX has been restored.
5983 * The master branch is now gated on an android bot, making building for
5984 android much more reliable.
5985 * Output flags have been centralized into one `--emit` flag.
5986 * Crate type flags have been centralized into one `--crate-type` flag.
5987 * Codegen flags have been consolidated behind a `-C` flag.
5988 * Linking against outdated crates now has improved error messages.
5989 * Error messages with lifetimes will often suggest how to annotate the
5990 function to fix the error.
5991 * Many more types are documented in the standard library, and new guides
5993 * Many `rustdoc` improvements:
5994 * code blocks are syntax highlighted.
5995 * render standalone markdown files.
5996 * the --test flag tests all code blocks by default.
5997 * exported macros are displayed.
5998 * re-exported types have their documentation inlined at the location of the
6000 * search works across crates that have been rendered to the same output
6004 Version 0.9 (2014-01-09)
6005 ==========================
6007 * ~1800 changes, numerous bugfixes
6010 * The `float` type has been removed. Use `f32` or `f64` instead.
6011 * A new facility for enabling experimental features (feature gating) has
6012 been added, using the crate-level `#[feature(foo)]` attribute.
6013 * Managed boxes (@) are now behind a feature gate
6014 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
6015 standard library's `Gc` or `Rc` types instead.
6016 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
6017 * Jumping back to the top of a loop is now done with `continue` instead of
6019 * Strings can no longer be mutated through index assignment.
6020 * Raw strings can be created via the basic `r"foo"` syntax or with matched
6021 hash delimiters, as in `r###"foo"###`.
6022 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
6024 * The `&fn` type is now written `|args| -> ret` to match the literal form.
6025 * `@fn`s have been removed.
6026 * `do` only works with procs in order to make it obvious what the cost
6028 * Single-element tuple-like structs can no longer be dereferenced to
6029 obtain the inner value. A more comprehensive solution for overloading
6030 the dereference operator will be provided in the future.
6031 * The `#[link(...)]` attribute has been replaced with
6032 `#[crate_id = "name#vers"]`.
6033 * Empty `impl`s must be terminated with empty braces and may not be
6034 terminated with a semicolon.
6035 * Keywords are no longer allowed as lifetime names; the `self` lifetime
6036 no longer has any special meaning.
6037 * The old `fmt!` string formatting macro has been removed.
6038 * `printf!` and `printfln!` (old-style formatting) removed in favor of
6039 `print!` and `println!`.
6040 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
6041 * The `extern mod foo (name = "bar")` syntax has been removed. Use
6042 `extern mod foo = "bar"` instead.
6043 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
6044 * Macros can have attributes.
6045 * Macros can expand to items with attributes.
6046 * Macros can expand to multiple items.
6047 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
6048 * Comments may be nested.
6049 * Values automatically coerce to trait objects they implement, without
6051 * Enum discriminants are no longer an entire word but as small as needed to
6052 contain all the variants. The `repr` attribute can be used to override
6053 the discriminant size, as in `#[repr(int)]` for integer-sized, and
6054 `#[repr(C)]` to match C enums.
6055 * Non-string literals are not allowed in attributes (they never worked).
6056 * The FFI now supports variadic functions.
6057 * Octal numeric literals, as in `0o7777`.
6058 * The `concat!` syntax extension performs compile-time string concatenation.
6059 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
6060 removed as Rust no longer uses segmented stacks.
6061 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
6062 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
6063 not `*`; ignoring remaining fields of a struct is also done with `..`,
6064 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
6065 * `rustc` supports the "win64" calling convention via `extern "win64"`.
6066 * `rustc` supports the "system" calling convention, which defaults to the
6067 preferred convention for the target platform, "stdcall" on 32-bit Windows,
6069 * The `type_overflow` lint (default: warn) checks literals for overflow.
6070 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
6071 * The `attribute_usage` lint (default: warn) warns about unknown
6073 * The `unknown_features` lint (default: warn) warns about unknown
6075 * The `dead_code` lint (default: warn) checks for dead code.
6076 * Rust libraries can be linked statically to one another
6077 * `#[link_args]` is behind the `link_args` feature gate.
6078 * Native libraries are now linked with `#[link(name = "foo")]`
6079 * Native libraries can be statically linked to a rust crate
6080 (`#[link(name = "foo", kind = "static")]`).
6081 * Native OS X frameworks are now officially supported
6082 (`#[link(name = "foo", kind = "framework")]`).
6083 * The `#[thread_local]` attribute creates thread-local (not task-local)
6084 variables. Currently behind the `thread_local` feature gate.
6085 * The `return` keyword may be used in closures.
6086 * Types that can be copied via a memcpy implement the `Pod` kind.
6087 * The `cfg` attribute can now be used on struct fields and enum variants.
6090 * std: The `option` and `result` API's have been overhauled to make them
6091 simpler, more consistent, and more composable.
6092 * std: The entire `std::io` module has been replaced with one that is
6093 more comprehensive and that properly interfaces with the underlying
6094 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
6096 * std: `io::util` contains a number of useful implementations of
6097 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
6098 `ZeroReader`, `TeeReader`.
6099 * std: The reference counted pointer type `extra::rc` moved into std.
6100 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
6101 just a wrapper around it).
6102 * std: The `Either` type has been removed.
6103 * std: `fmt::Default` can be implemented for any type to provide default
6104 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
6105 * std: The `rand` API continues to be tweaked.
6106 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
6107 on failure in gdb, is now named `rust_fail`.
6108 * std: The `each_key` and `each_value` methods on `HashMap` have been
6109 replaced by the `keys` and `values` iterators.
6110 * std: Functions dealing with type size and alignment have moved from the
6111 `sys` module to the `mem` module.
6112 * std: The `path` module was written and API changed.
6113 * std: `str::from_utf8` has been changed to cast instead of allocate.
6114 * std: `starts_with` and `ends_with` methods added to vectors via the
6115 `ImmutableEqVector` trait, which is in the prelude.
6116 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
6117 if the index is out of bounds.
6118 * std: Task failure no longer propagates between tasks, as the model was
6119 complex, expensive, and incompatible with thread-based tasks.
6120 * std: The `Any` type can be used for dynamic typing.
6121 * std: `~Any` can be passed to the `fail!` macro and retrieved via
6123 * std: Methods that produce iterators generally do not have an `_iter`
6125 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
6126 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
6127 * std: `util::ignore` renamed to `prelude::drop`.
6128 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
6130 * std: `vec::raw` has seen a lot of cleanup and API changes.
6131 * std: The standard library no longer includes any C++ code, and very
6132 minimal C, eliminating the dependency on libstdc++.
6133 * std: Runtime scheduling and I/O functionality has been factored out into
6134 extensible interfaces and is now implemented by two different crates:
6135 libnative, for native threading and I/O; and libgreen, for green threading
6136 and I/O. This paves the way for using the standard library in more limited
6137 embedded environments.
6138 * std: The `comm` module has been rewritten to be much faster, have a
6139 simpler, more consistent API, and to work for both native and green
6141 * std: All libuv dependencies have been moved into the rustuv crate.
6142 * native: New implementations of runtime scheduling on top of OS threads.
6143 * native: New native implementations of TCP, UDP, file I/O, process spawning,
6145 * green: The green thread scheduler and message passing types are almost
6147 * extra: The `flatpipes` module had bitrotted and was removed.
6148 * extra: All crypto functions have been removed and Rust now has a policy of
6149 not reimplementing crypto in the standard library. In the future crypto
6150 will be provided by external crates with bindings to established libraries.
6151 * extra: `c_vec` has been modernized.
6152 * extra: The `sort` module has been removed. Use the `sort` method on
6156 * The `rust` and `rusti` commands have been removed, due to lack of
6158 * `rustdoc` was completely rewritten.
6159 * `rustdoc` can test code examples in documentation.
6160 * `rustpkg` can test packages with the argument, 'test'.
6161 * `rustpkg` supports arbitrary dependencies, including C libraries.
6162 * `rustc`'s support for generating debug info is improved again.
6163 * `rustc` has better error reporting for unbalanced delimiters.
6164 * `rustc`'s JIT support was removed due to bitrot.
6165 * Executables and static libraries can be built with LTO (-Z lto)
6166 * `rustc` adds a `--dep-info` flag for communicating dependencies to
6170 Version 0.8 (2013-09-26)
6171 ============================
6173 * ~2200 changes, numerous bugfixes
6176 * The `for` loop syntax has changed to work with the `Iterator` trait.
6177 * At long last, unwinding works on Windows.
6178 * Default methods are ready for use.
6179 * Many trait inheritance bugs fixed.
6180 * Owned and borrowed trait objects work more reliably.
6181 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
6182 * rustc can omit emission of code for the `debug!` macro if it is passed
6184 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
6185 for foo.rs, then foo/mod.rs, and will generate an error when both are
6187 * Strings no longer contain trailing nulls. The new `std::c_str` module
6188 provides new mechanisms for converting to C strings.
6189 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
6190 * The FFI has been overhauled such that foreign functions are called directly,
6191 instead of through a stack-switching wrapper.
6192 * Calling a foreign function must be done through a Rust function with the
6193 `#[fixed_stack_segment]` attribute.
6194 * The `externfn!` macro can be used to declare both a foreign function and
6195 a `#[fixed_stack_segment]` wrapper at once.
6196 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
6197 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
6198 * `priv` is disallowed everywhere except for struct fields and enum variants.
6199 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
6200 * `ref` bindings in irrefutable patterns work correctly now.
6201 * `char` is now prevented from containing invalid code points.
6202 * Casting to `bool` is no longer allowed.
6203 * `\0` is now accepted as an escape in chars and strings.
6204 * `yield` is a reserved keyword.
6205 * `typeof` is a reserved keyword.
6206 * Crates may be imported by URL with `extern mod foo = "url";`.
6207 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
6208 * Static vectors can be initialized with repeating elements,
6209 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
6210 * Static structs can be initialized with functional record update,
6211 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
6212 * `cfg!` can be used to conditionally execute code based on the crate
6213 configuration, similarly to `#[cfg(...)]`.
6214 * The `unnecessary_qualification` lint detects unneeded module
6215 prefixes (default: allow).
6216 * Arithmetic operations have been implemented on the SIMD types in
6217 `std::unstable::simd`.
6218 * Exchange allocation headers were removed, reducing memory usage.
6219 * `format!` implements a completely new, extensible, and higher-performance
6220 string formatting system. It will replace `fmt!`.
6221 * `print!` and `println!` write formatted strings (using the `format!`
6222 extension) to stdout.
6223 * `write!` and `writeln!` write formatted strings (using the `format!`
6224 extension) to the new Writers in `std::rt::io`.
6225 * The library section in which a function or static is placed may
6226 be specified with `#[link_section = "..."]`.
6227 * The `proto!` syntax extension for defining bounded message protocols
6229 * `macro_rules!` is hygienic for `let` declarations.
6230 * The `#[export_name]` attribute specifies the name of a symbol.
6231 * `unreachable!` can be used to indicate unreachable code, and fails
6235 * std: Transitioned to the new runtime, written in Rust.
6236 * std: Added an experimental I/O library, `rt::io`, based on the new
6238 * std: A new generic `range` function was added to the prelude, replacing
6239 `uint::range` and friends.
6240 * std: `range_rev` no longer exists. Since range is an iterator it can be
6241 reversed with `range(lo, hi).invert()`.
6242 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
6243 renamed to `unwrap_or`.
6244 * std: The `iterator` module was renamed to `iter`.
6245 * std: Integral types now support the `checked_add`, `checked_sub`, and
6246 `checked_mul` operations for detecting overflow.
6247 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
6249 * std: Methods are standardizing on conventions for casting methods:
6250 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
6252 * std: The `CString` type in `c_str` provides new ways to convert to and
6254 * std: `DoubleEndedIterator` can yield elements in two directions.
6255 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
6257 * std: `str::from_bytes` renamed to `str::from_utf8`.
6258 * std: `pop_opt` and `shift_opt` methods added to vectors.
6259 * std: The task-local data interface no longer uses @, and keys are
6260 no longer function pointers.
6261 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
6262 * std: Added `SharedPort` to `comm`.
6263 * std: `Eq` has a default method for `ne`; only `eq` is required
6265 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
6266 is required in implementations.
6267 * std: `is_utf8` performance is improved, impacting many string functions.
6268 * std: `os::MemoryMap` provides cross-platform mmap.
6269 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
6270 are not 'in-bounds' are considered undefined.
6271 * std: Many freestanding functions in `vec` removed in favor of methods.
6272 * std: Many freestanding functions on scalar types removed in favor of
6274 * std: Many options to task builders were removed since they don't make
6275 sense in the new scheduler design.
6276 * std: More containers implement `FromIterator` so can be created by the
6278 * std: More complete atomic types in `unstable::atomics`.
6279 * std: `comm::PortSet` removed.
6280 * std: Mutating methods in the `Set` and `Map` traits have been moved into
6281 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
6282 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
6283 default implementations.
6284 * std: Various `from_str` functions were removed in favor of a generic
6285 `from_str` which is available in the prelude.
6286 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
6287 * extra: `dlist`, the doubly-linked list was modernized.
6288 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
6289 * extra: Added `glob` module, replacing `std::os::glob`.
6290 * extra: `rope` was removed.
6291 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
6292 * extra: `net`, and `timer` were removed. The experimental replacements
6293 are `std::rt::io::net` and `std::rt::io::timer`.
6294 * extra: Iterators implemented for `SmallIntMap`.
6295 * extra: Iterators implemented for `Bitv` and `BitvSet`.
6296 * extra: `SmallIntSet` removed. Use `BitvSet`.
6297 * extra: Performance of JSON parsing greatly improved.
6298 * extra: `semver` updated to SemVer 2.0.0.
6299 * extra: `term` handles more terminals correctly.
6300 * extra: `dbg` module removed.
6301 * extra: `par` module removed.
6302 * extra: `future` was cleaned up, with some method renames.
6303 * extra: Most free functions in `getopts` were converted to methods.
6306 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
6307 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
6308 similarly to gcc's `--march` flag.
6309 * rustc's performance compiling small crates is much better.
6310 * rustpkg has received many improvements.
6311 * rustpkg supports git tags as package IDs.
6312 * rustpkg builds into target-specific directories so it can be used for
6314 * The number of concurrent test tasks is controlled by the environment
6315 variable RUST_TEST_TASKS.
6316 * The test harness can now report metrics for benchmarks.
6317 * All tools have man pages.
6318 * Programs compiled with `--test` now support the `-h` and `--help` flags.
6319 * The runtime uses jemalloc for allocations.
6320 * Segmented stacks are temporarily disabled as part of the transition to
6321 the new runtime. Stack overflows are possible!
6322 * A new documentation backend, rustdoc_ng, is available for use. It is
6323 still invoked through the normal `rustdoc` command.
6326 Version 0.7 (2013-07-03)
6327 =======================
6329 * ~2000 changes, numerous bugfixes
6332 * `impl`s no longer accept a visibility qualifier. Put them on methods
6334 * The borrow checker has been rewritten with flow-sensitivity, fixing
6335 many bugs and inconveniences.
6336 * The `self` parameter no longer implicitly means `&'self self`,
6337 and can be explicitly marked with a lifetime.
6338 * Overloadable compound operators (`+=`, etc.) have been temporarily
6339 removed due to bugs.
6340 * The `for` loop protocol now requires `for`-iterators to return `bool`
6341 so they compose better.
6342 * The `Durable` trait is replaced with the `'static` bounds.
6343 * Trait default methods work more often.
6344 * Structs with the `#[packed]` attribute have byte alignment and
6345 no padding between fields.
6346 * Type parameters bound by `Copy` must now be copied explicitly with
6348 * It is now illegal to move out of a dereferenced unsafe pointer.
6349 * `Option<~T>` is now represented as a nullable pointer.
6350 * `@mut` does dynamic borrow checks correctly.
6351 * The `main` function is only detected at the topmost level of the crate.
6352 The `#[main]` attribute is still valid anywhere.
6353 * Struct fields may no longer be mutable. Use inherited mutability.
6354 * The `#[no_send]` attribute makes a type that would otherwise be
6356 * The `#[no_freeze]` attribute makes a type that would otherwise be
6358 * Unbounded recursion will abort the process after reaching the limit
6359 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
6360 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
6361 are never implicitly copyable.
6362 * `#[static_assert]` makes compile-time assertions about static bools.
6363 * At long last, 'argument modes' no longer exist.
6364 * The rarely used `use mod` statement no longer exists.
6367 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
6369 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
6370 `Rand`, `Zero` and `ToStr` can all be automatically derived with
6372 * The `bytes!` macro returns a vector of bytes for string, u8, char,
6373 and unsuffixed integer literals.
6376 * The `core` crate was renamed to `std`.
6377 * The `std` crate was renamed to `extra`.
6378 * More and improved documentation.
6379 * std: `iterator` module for external iterator objects.
6380 * Many old-style (internal, higher-order function) iterators replaced by
6381 implementations of `Iterator`.
6382 * std: Many old internal vector and string iterators,
6383 incl. `any`, `all`. removed.
6384 * std: The `finalize` method of `Drop` renamed to `drop`.
6385 * std: The `drop` method now takes `&mut self` instead of `&self`.
6386 * std: The prelude no longer re-exports any modules, only types and traits.
6387 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
6388 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
6389 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
6390 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
6391 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
6392 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
6393 * std: Many types implement `Clone`.
6394 * std: `path` type renamed to `Path`.
6395 * std: `mut` module and `Mut` type removed.
6396 * std: Many standalone functions removed in favor of methods and iterators
6397 in `vec`, `str`. In the future methods will also work as functions.
6398 * std: `reinterpret_cast` removed. Use `transmute`.
6399 * std: ascii string handling in `std::ascii`.
6400 * std: `Rand` is implemented for ~/@.
6401 * std: `run` module for spawning processes overhauled.
6402 * std: Various atomic types added to `unstable::atomic`.
6403 * std: Various types implement `Zero`.
6404 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
6405 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
6406 * std: Added `os::mkdir_recursive`.
6407 * std: Added `os::glob` function performs filesystems globs.
6408 * std: `FuzzyEq` renamed to `ApproxEq`.
6409 * std: `Map` now defines `pop` and `swap` methods.
6410 * std: `Cell` constructors converted to static methods.
6411 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
6412 * extra: `flate` module moved from `std` to `extra`.
6413 * extra: `fileinput` module for iterating over a series of files.
6414 * extra: `Complex` number type and `complex` module.
6415 * extra: `Rational` number type and `rational` module.
6416 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
6417 * extra: `term` uses terminfo now, is more correct.
6418 * extra: `arc` functions converted to methods.
6419 * extra: Implementation of fixed output size variations of SHA-2.
6422 * `unused_variable` lint mode for unused variables (default: warn).
6423 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
6425 * `unused_mut` lint mode for identifying unused `mut` qualifiers
6427 * `dead_assignment` lint mode for unread variables (default: warn).
6428 * `unnecessary_allocation` lint mode detects some heap allocations that are
6429 immediately borrowed so could be written without allocating (default: warn).
6430 * `missing_doc` lint mode (default: allow).
6431 * `unreachable_code` lint mode (default: warn).
6432 * The `rusti` command has been rewritten and a number of bugs addressed.
6433 * rustc outputs in color on more terminals.
6434 * rustc accepts a `--link-args` flag to pass arguments to the linker.
6435 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
6436 * Compiling with `-g` will make the binary record information about
6437 dynamic borrowcheck failures for debugging.
6438 * rustdoc has a nicer stylesheet.
6439 * Various improvements to rustdoc.
6440 * Improvements to rustpkg (see the detailed release notes).
6443 Version 0.6 (2013-04-03)
6444 ========================
6446 * ~2100 changes, numerous bugfixes
6449 * The self type parameter in traits is now spelled `Self`
6450 * The `self` parameter in trait and impl methods must now be explicitly
6451 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
6452 * Static methods no longer require the `static` keyword and instead
6453 are distinguished by the lack of a `self` parameter
6454 * Replaced the `Durable` trait with the `'static` lifetime
6455 * The old closure type syntax with the trailing sigil has been
6456 removed in favor of the more consistent leading sigil
6457 * `super` is a keyword, and may be prefixed to paths
6458 * Trait bounds are separated with `+` instead of whitespace
6459 * Traits are implemented with `impl Trait for Type`
6460 instead of `impl Type: Trait`
6461 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
6462 * The `export` keyword has finally been removed
6463 * The `move` keyword has been removed (see "Semantic changes")
6464 * The interior mutability qualifier on vectors, `[mut T]`, has been
6465 removed. Use `&mut [T]`, etc.
6466 * `mut` is no longer valid in `~mut T`. Use inherited mutability
6467 * `fail` is no longer a keyword. Use `fail!()`
6468 * `assert` is no longer a keyword. Use `assert!()`
6469 * `log` is no longer a keyword. use `debug!`, etc.
6470 * 1-tuples may be represented as `(T,)`
6471 * Struct fields may no longer be `mut`. Use inherited mutability,
6472 `@mut T`, `core::mut` or `core::cell`
6473 * `extern mod { ... }` is no longer valid syntax for foreign
6474 function modules. Use extern blocks: `extern { ... }`
6475 * Newtype enums removed. Use tuple-structs.
6476 * Trait implementations no longer support visibility modifiers
6477 * Pattern matching over vectors improved and expanded
6478 * `const` renamed to `static` to correspond to lifetime name,
6479 and make room for future `static mut` unsafe mutable globals.
6480 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
6481 * `Clone` implementations can be automatically generated with
6482 `#[deriving(Clone)]`
6483 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
6484 instead of `foo as Bar`.
6485 * Fixed length vector types are now written as `[int, .. 3]`
6486 instead of `[int * 3]`.
6487 * Fixed length vector types can express the length as a constant
6488 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
6491 * Types with owned pointers or custom destructors move by default,
6492 eliminating the `move` keyword
6493 * All foreign functions are considered unsafe
6494 * &mut is now unaliasable
6495 * Writes to borrowed @mut pointers are prevented dynamically
6497 * The name of the main function can be customized using #[main]
6498 * The default type of an inferred closure is &fn instead of @fn
6499 * `use` statements may no longer be "chained" - they cannot import
6500 identifiers imported by previous `use` statements
6501 * `use` statements are crate relative, importing from the "top"
6502 of the crate by default. Paths may be prefixed with `super::`
6503 or `self::` to change the search behavior.
6504 * Method visibility is inherited from the implementation declaration
6505 * Structural records have been removed
6506 * Many more types can be used in static items, including enums
6507 'static-lifetime pointers and vectors
6508 * Pattern matching over vectors improved and expanded
6509 * Typechecking of closure types has been overhauled to
6510 improve inference and eliminate unsoundness
6511 * Macros leave scope at the end of modules, unless that module is
6512 tagged with #[macro_escape]
6515 * Added big integers to `std::bigint`
6516 * Removed `core::oldcomm` module
6517 * Added pipe-based `core::comm` module
6518 * Numeric traits have been reorganized under `core::num`
6519 * `vec::slice` finally returns a slice
6520 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
6521 * Containers reorganized around traits in `core::container`
6522 * `core::dvec` removed, `~[T]` is a drop-in replacement
6523 * `core::send_map` renamed to `core::hashmap`
6524 * `std::map` removed; replaced with `core::hashmap`
6525 * `std::treemap` reimplemented as an owned balanced tree
6526 * `std::deque` and `std::smallintmap` reimplemented as owned containers
6527 * `core::trie` added as a fast ordered map for integer keys
6528 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
6529 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
6530 overload the comparison operators, whereas `TotalOrd` is used
6531 by certain container types
6534 * Replaced the 'cargo' package manager with 'rustpkg'
6535 * Added all-purpose 'rust' tool
6536 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
6537 * rustc now *attempts* to offer spelling suggestions
6538 * Improved support for ARM and Android
6539 * Preliminary MIPS backend
6540 * Improved foreign function ABI implementation for x86, x86_64
6541 * Various memory usage improvements
6542 * Rust code may be embedded in foreign code under limited circumstances
6543 * Inline assembler supported by new asm!() syntax extension.
6546 Version 0.5 (2012-12-21)
6547 ===========================
6549 * ~900 changes, numerous bugfixes
6552 * Removed `<-` move operator
6553 * Completed the transition from the `#fmt` extension syntax to `fmt!`
6554 * Removed old fixed length vector syntax - `[T]/N`
6555 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
6556 * Macros may now expand to items and statements
6557 * `a.b()` is always parsed as a method call, never as a field projection
6558 * `Eq` and `IterBytes` implementations can be automatically generated
6559 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
6560 * Removed the special crate language for `.rc` files
6561 * Function arguments may consist of any irrefutable pattern
6564 * `&` and `~` pointers may point to objects
6565 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
6566 * Enum variants may be structs
6567 * Destructors can be added to all nominal types with the Drop trait
6568 * Structs and nullary enum variants may be constants
6569 * Values that cannot be implicitly copied are now automatically moved
6570 without writing `move` explicitly
6571 * `&T` may now be coerced to `*T`
6572 * Coercions happen in `let` statements as well as function calls
6573 * `use` statements now take crate-relative paths
6574 * The module and type namespaces have been merged so that static
6575 method names can be resolved under the trait in which they are
6578 * Improved support for language features
6579 * Trait inheritance works in many scenarios
6580 * More support for explicit self arguments in methods - `self`, `&self`
6581 `@self`, and `~self` all generally work as expected
6582 * Static methods work in more situations
6583 * Experimental: Traits may declare default methods for the implementations
6587 * New condition handling system in `core::condition`
6588 * Timsort added to `std::sort`
6589 * New priority queue, `std::priority_queue`
6590 * Pipes for serializable types, `std::flatpipes'
6591 * Serialization overhauled to be trait-based
6592 * Expanded `getopts` definitions
6593 * Moved futures to `std`
6594 * More functions are pure now
6595 * `core::comm` renamed to `oldcomm`. Still deprecated
6596 * `rustdoc` and `cargo` are libraries now
6599 * Added a preliminary REPL, `rusti`
6600 * License changed from MIT to dual MIT/APL2
6603 Version 0.4 (2012-10-15)
6604 ==========================
6606 * ~2000 changes, numerous bugfixes
6609 * All keywords are now strict and may not be used as identifiers anywhere
6610 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
6611 'of', 'with', 'to', 'class'.
6612 * Classes are replaced with simpler structs
6613 * Explicit method self types
6614 * `ret` became `return` and `alt` became `match`
6615 * `import` is now `use`; `use is now `extern mod`
6616 * `extern mod { ... }` is now `extern { ... }`
6617 * `use mod` is the recommended way to import modules
6618 * `pub` and `priv` replace deprecated export lists
6619 * The syntax of `match` pattern arms now uses fat arrow (=>)
6620 * `main` no longer accepts an args vector; use `os::args` instead
6623 * Trait implementations are now coherent, ala Haskell typeclasses
6624 * Trait methods may be static
6625 * Argument modes are deprecated
6626 * Borrowed pointers are much more mature and recommended for use
6627 * Strings and vectors in the static region are stored in constant memory
6628 * Typestate was removed
6629 * Resolution rewritten to be more reliable
6630 * Support for 'dual-mode' data structures (freezing and thawing)
6633 * Most binary operators can now be overloaded via the traits in
6635 * `std::net::url` for representing URLs
6636 * Sendable hash maps in `core::send_map`
6637 * `core::task' gained a (currently unsafe) task-local storage API
6640 * An efficient new intertask communication primitive called the pipe,
6641 along with a number of higher-level channel types, in `core::pipes`
6642 * `std::arc`, an atomically reference counted, immutable, shared memory
6644 * `std::sync`, various exotic synchronization tools based on arcs and pipes
6645 * Futures are now based on pipes and sendable
6646 * More robust linked task failure
6647 * Improved task builder API
6650 * Improved error reporting
6651 * Preliminary JIT support
6652 * Preliminary work on precise GC
6653 * Extensive architectural improvements to rustc
6654 * Begun a transition away from buggy C++-based reflection (shape) code to
6655 Rust-based (visitor) code
6656 * All hash functions and tables converted to secure, randomized SipHash
6659 Version 0.3 (2012-07-12)
6660 ========================
6662 * ~1900 changes, numerous bugfixes
6664 * New coding conveniences
6665 * Integer-literal suffix inference
6666 * Per-item control over warnings, errors
6667 * #[cfg(windows)] and #[cfg(unix)] attributes
6668 * Documentation comments
6669 * More compact closure syntax
6670 * 'do' expressions for treating higher-order functions as
6672 * *-patterns (wildcard extended to all constructor fields)
6675 * Name resolution pass and exhaustiveness checker rewritten
6676 * Region pointers and borrow checking supersede alias
6678 * Init-ness checking is now provided by a region-based liveness
6679 pass instead of the typestate pass; same for last-use analysis
6680 * Extensive work on region pointers
6682 * Experimental new language features
6683 * Slices and fixed-size, interior-allocated vectors
6684 * #!-comments for lang versioning, shell execution
6685 * Destructors and iface implementation for classes;
6686 type-parameterized classes and class methods
6687 * 'const' type kind for types that can be used to implement
6688 shared-memory concurrency patterns
6692 * Removal of various obsolete features
6693 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
6694 'crust', 'native' (now 'extern'), 'cont' (now 'again')
6696 * Constructs: do-while loops ('do' repurposed), fn binding,
6697 resources (replaced by destructors)
6699 * Compiler reorganization
6700 * Syntax-layer of compiler split into separate crate
6701 * Clang (from LLVM project) integrated into build
6702 * Typechecker split into sub-modules
6705 * New time functions
6706 * Extension methods for many built-in types
6707 * Arc: atomic-refcount read-only / exclusive-use shared cells
6708 * Par: parallel map and search routines
6709 * Extensive work on libuv interface
6710 * Much vector code moved to libraries
6711 * Syntax extensions: #line, #col, #file, #mod, #stringify,
6712 #include, #include_str, #include_bin
6715 * Cargo automatically resolves dependencies
6718 Version 0.2 (2012-03-29)
6719 =========================
6721 * >1500 changes, numerous bugfixes
6723 * New docs and doc tooling
6725 * New port: FreeBSD x86_64
6727 * Compilation model enhancements
6728 * Generics now specialized, multiply instantiated
6729 * Functions now inlined across separate crates
6731 * Scheduling, stack and threading fixes
6732 * Noticeably improved message-passing performance
6733 * Explicit schedulers
6737 * Experimental new language features
6738 * Operator overloading
6742 * Various language extensions
6743 * C-callback function types: 'crust fn ...'
6744 * Infinite-loop construct: 'loop { ... }'
6745 * Shorten 'mutable' to 'mut'
6746 * Required mutable-local qualifier: 'let mut ...'
6747 * Basic glob-exporting: 'export foo::*;'
6748 * Alt now exhaustive, 'alt check' for runtime-checked
6749 * Block-function form of 'for' loop, with 'break' and 'ret'.
6752 * AST quasi-quote syntax extension
6753 * Revived libuv interface
6754 * New modules: core::{future, iter}, std::arena
6755 * Merged per-platform std::{os*, fs*} to core::{libc, os}
6756 * Extensive cleanup, regularization in libstd, libcore
6759 Version 0.1 (2012-01-20)
6760 ===============================
6762 * Most language features work, including:
6763 * Unique pointers, unique closures, move semantics
6764 * Interface-constrained generics
6765 * Static interface dispatch
6767 * Multithread task scheduling
6768 * Typestate predicates
6769 * Failure unwinding, destructors
6770 * Pattern matching and destructuring assignment
6771 * Lightweight block-lambda syntax
6772 * Preliminary macro-by-example
6774 * Compiler works with the following configurations:
6775 * Linux: x86 and x86_64 hosts and targets
6776 * macOS: x86 and x86_64 hosts and targets
6777 * Windows: x86 hosts and targets
6779 * Cross compilation / multi-target configuration supported.
6781 * Preliminary API-documentation and package-management tools included.
6785 * Documentation is incomplete.
6787 * Performance is below intended target.
6789 * Standard library APIs are subject to extensive change, reorganization.
6791 * Language-level versioning is not yet operational - future code will