1 Version 1.29.1 (2018-09-25)
2 ===========================
7 - The standard library's `str::repeat` function contained an out of bounds write
8 caused by an integer overflow. This has been fixed by deterministically
9 panicking when an overflow happens.
11 Thank you to Scott McMurray for responsibily disclosing this vulnerability to
14 Version 1.29.0 (2018-09-13)
15 ==========================
19 - [Bumped minimum LLVM version to 5.0.][51899]
20 - [Added `powerpc64le-unknown-linux-musl` target.][51619]
21 - [Added `aarch64-unknown-hermit` and `x86_64-unknown-hermit` targets.][52861]
25 - [`Once::call_once` now no longer requires `Once` to be `'static`.][52239]
26 - [`BuildHasherDefault` now implements `PartialEq` and `Eq`.][52402]
27 - [`Box<CStr>`, `Box<OsStr>`, and `Box<Path>` now implement `Clone`.][51912]
28 - [Implemented `PartialEq<&str>` for `OsString` and `PartialEq<OsString>`
30 - [`Cell<T>` now allows `T` to be unsized.][50494]
31 - [`SocketAddr` is now stable on Redox.][52656]
36 - [`Iterator::flatten`]
41 - [Cargo can silently fix some bad lockfiles ][cargo/5831] You can use
42 `--locked` to disable this behaviour.
43 - [`cargo-install` will now allow you to cross compile an install
44 using `--target`][cargo/5614]
45 - [Added the `cargo-fix` subcommand to automatically move project code from
46 2015 edition to 2018.][cargo/5723]
47 - [`cargo doc` can now optionally document private types using the
48 `--document-private-items` flag.][cargo/5543]
52 - [`rustdoc` now has the `--cap-lints` option which demotes all lints above
53 the specified level to that level.][52354] For example `--cap-lints warn`
54 will demote `deny` and `forbid` lints to `warn`.
55 - [`rustc` and `rustdoc` will now have the exit code of `1` if compilation
56 fails, and `101` if there is a panic.][52197]
57 - [A preview of clippy has been made available through rustup.][51122]
58 You can install the preview with `rustup component add clippy-preview`
62 - [`str::{slice_unchecked, slice_unchecked_mut}` are now deprecated.][51807]
63 Use `str::get_unchecked(begin..end)` instead.
64 - [`std::env::home_dir` is now deprecated for its unintuitive behaviour.][51656]
65 Consider using the `home_dir` function from
66 https://crates.io/crates/dirs instead.
67 - [`rustc` will no longer silently ignore invalid data in target spec.][52330]
69 [52861]: https://github.com/rust-lang/rust/pull/52861/
70 [52656]: https://github.com/rust-lang/rust/pull/52656/
71 [52239]: https://github.com/rust-lang/rust/pull/52239/
72 [52330]: https://github.com/rust-lang/rust/pull/52330/
73 [52354]: https://github.com/rust-lang/rust/pull/52354/
74 [52402]: https://github.com/rust-lang/rust/pull/52402/
75 [52103]: https://github.com/rust-lang/rust/pull/52103/
76 [52197]: https://github.com/rust-lang/rust/pull/52197/
77 [51807]: https://github.com/rust-lang/rust/pull/51807/
78 [51899]: https://github.com/rust-lang/rust/pull/51899/
79 [51912]: https://github.com/rust-lang/rust/pull/51912/
80 [51511]: https://github.com/rust-lang/rust/pull/51511/
81 [51619]: https://github.com/rust-lang/rust/pull/51619/
82 [51656]: https://github.com/rust-lang/rust/pull/51656/
83 [51178]: https://github.com/rust-lang/rust/pull/51178/
84 [51122]: https://github.com/rust-lang/rust/pull/51122
85 [50494]: https://github.com/rust-lang/rust/pull/50494/
86 [cargo/5543]: https://github.com/rust-lang/cargo/pull/5543
87 [cargo/5614]: https://github.com/rust-lang/cargo/pull/5614/
88 [cargo/5723]: https://github.com/rust-lang/cargo/pull/5723/
89 [cargo/5831]: https://github.com/rust-lang/cargo/pull/5831/
90 [`Arc::downcast`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.downcast
91 [`Iterator::flatten`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.flatten
92 [`Rc::downcast`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.downcast
95 Version 1.28.0 (2018-08-02)
96 ===========================
100 - [The `#[repr(transparent)]` attribute is now stable.][51562] This attribute
101 allows a Rust newtype wrapper (`struct NewType<T>(T);`) to be represented as
102 the inner type across Foreign Function Interface (FFI) boundaries.
103 - [The keywords `pure`, `sizeof`, `alignof`, and `offsetof` have been unreserved
104 and can now be used as identifiers.][51196]
105 - [The `GlobalAlloc` trait and `#[global_allocator]` attribute are now
106 stable.][51241] This will allow users to specify a global allocator for
108 - [Unit test functions marked with the `#[test]` attribute can now return
109 `Result<(), E: Debug>` in addition to `()`.][51298]
110 - [The `lifetime` specifier for `macro_rules!` is now stable.][50385] This
111 allows macros to easily target lifetimes.
115 - [The `s` and `z` optimisation levels are now stable.][50265] These optimisations
116 prioritise making smaller binary sizes. `z` is the same as `s` with the
117 exception that it does not vectorise loops, which typically results in an even
119 - [The short error format is now stable.][49546] Specified with
120 `--error-format=short` this option will provide a more compressed output of
122 - [Added a lint warning when you have duplicated `macro_export`s.][50143]
123 - [Reduced the number of allocations in the macro parser.][50855] This can
124 improve compile times of macro heavy crates on average by 5%.
128 - [Implemented `Default` for `&mut str`.][51306]
129 - [Implemented `From<bool>` for all integer and unsigned number types.][50554]
130 - [Implemented `Extend` for `()`.][50234]
131 - [The `Debug` implementation of `time::Duration` should now be more easily
132 human readable.][50364] Previously a `Duration` of one second would printed as
133 `Duration { secs: 1, nanos: 0 }` and will now be printed as `1s`.
134 - [Implemented `From<&String>` for `Cow<str>`, `From<&Vec<T>>` for `Cow<[T]>`,
135 `From<Cow<CStr>>` for `CString`, `From<CString>, From<CStr>, From<&CString>`
136 for `Cow<CStr>`, `From<OsString>, From<OsStr>, From<&OsString>` for
137 `Cow<OsStr>`, `From<&PathBuf>` for `Cow<Path>`, and `From<Cow<Path>>`
138 for `PathBuf`.][50170]
139 - [Implemented `Shl` and `Shr` for `Wrapping<u128>`
140 and `Wrapping<i128>`.][50465]
141 - [`DirEntry::metadata` now uses `fstatat` instead of `lstat` when
142 possible.][51050] This can provide up to a 40% speed increase.
143 - [Improved error messages when using `format!`.][50610]
147 - [`Iterator::step_by`]
148 - [`Path::ancestors`]
149 - [`SystemTime::UNIX_EPOCH`]
150 - [`alloc::GlobalAlloc`]
152 - [`alloc::LayoutErr`]
155 - [`alloc::alloc_zeroed`]
158 - [`alloc::handle_alloc_error`]
159 - [`btree_map::Entry::or_default`]
161 - [`hash_map::Entry::or_default`]
162 - [`iter::repeat_with`]
163 - [`num::NonZeroUsize`]
164 - [`num::NonZeroU128`]
165 - [`num::NonZeroU16`]
166 - [`num::NonZeroU32`]
167 - [`num::NonZeroU64`]
169 - [`ops::RangeBounds`]
170 - [`slice::SliceIndex`]
171 - [`slice::from_mut`]
172 - [`slice::from_ref`]
173 - [`{Any + Send + Sync}::downcast_mut`]
174 - [`{Any + Send + Sync}::downcast_ref`]
175 - [`{Any + Send + Sync}::is`]
179 - [Cargo will now no longer allow you to publish crates with build scripts that
180 modify the `src` directory.][cargo/5584] The `src` directory in a crate should be
181 considered to be immutable.
185 - [The `suggestion_applicability` field in `rustc`'s json output is now
186 stable.][50486] This will allow dev tools to check whether a code suggestion
191 - [Rust will consider trait objects with duplicated constraints to be the same
192 type as without the duplicated constraint.][51276] For example the below code will
198 fn test(&self) { println!("one"); } //~ ERROR duplicate definitions with name `test`
201 impl Trait + Send + Send {
202 fn test(&self) { println!("two"); }
206 [49546]: https://github.com/rust-lang/rust/pull/49546/
207 [50143]: https://github.com/rust-lang/rust/pull/50143/
208 [50170]: https://github.com/rust-lang/rust/pull/50170/
209 [50234]: https://github.com/rust-lang/rust/pull/50234/
210 [50265]: https://github.com/rust-lang/rust/pull/50265/
211 [50364]: https://github.com/rust-lang/rust/pull/50364/
212 [50385]: https://github.com/rust-lang/rust/pull/50385/
213 [50465]: https://github.com/rust-lang/rust/pull/50465/
214 [50486]: https://github.com/rust-lang/rust/pull/50486/
215 [50554]: https://github.com/rust-lang/rust/pull/50554/
216 [50610]: https://github.com/rust-lang/rust/pull/50610/
217 [50855]: https://github.com/rust-lang/rust/pull/50855/
218 [51050]: https://github.com/rust-lang/rust/pull/51050/
219 [51196]: https://github.com/rust-lang/rust/pull/51196/
220 [51200]: https://github.com/rust-lang/rust/pull/51200/
221 [51241]: https://github.com/rust-lang/rust/pull/51241/
222 [51276]: https://github.com/rust-lang/rust/pull/51276/
223 [51298]: https://github.com/rust-lang/rust/pull/51298/
224 [51306]: https://github.com/rust-lang/rust/pull/51306/
225 [51562]: https://github.com/rust-lang/rust/pull/51562/
226 [cargo/5584]: https://github.com/rust-lang/cargo/pull/5584/
227 [`Iterator::step_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.step_by
228 [`Path::ancestors`]: https://doc.rust-lang.org/std/path/struct.Path.html#method.ancestors
229 [`SystemTime::UNIX_EPOCH`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#associatedconstant.UNIX_EPOCH
230 [`alloc::GlobalAlloc`]: https://doc.rust-lang.org/std/alloc/trait.GlobalAlloc.html
231 [`alloc::Layout`]: https://doc.rust-lang.org/std/alloc/struct.Layout.html
232 [`alloc::LayoutErr`]: https://doc.rust-lang.org/std/alloc/struct.LayoutErr.html
233 [`alloc::System`]: https://doc.rust-lang.org/std/alloc/struct.System.html
234 [`alloc::alloc`]: https://doc.rust-lang.org/std/alloc/fn.alloc.html
235 [`alloc::alloc_zeroed`]: https://doc.rust-lang.org/std/alloc/fn.alloc_zeroed.html
236 [`alloc::dealloc`]: https://doc.rust-lang.org/std/alloc/fn.dealloc.html
237 [`alloc::realloc`]: https://doc.rust-lang.org/std/alloc/fn.realloc.html
238 [`alloc::handle_alloc_error`]: https://doc.rust-lang.org/std/alloc/fn.handle_alloc_error.html
239 [`btree_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.or_default
240 [`fmt::Alignment`]: https://doc.rust-lang.org/std/fmt/enum.Alignment.html
241 [`hash_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.or_default
242 [`iter::repeat_with`]: https://doc.rust-lang.org/std/iter/fn.repeat_with.html
243 [`num::NonZeroUsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroUsize.html
244 [`num::NonZeroU128`]: https://doc.rust-lang.org/std/num/struct.NonZeroU128.html
245 [`num::NonZeroU16`]: https://doc.rust-lang.org/std/num/struct.NonZeroU16.html
246 [`num::NonZeroU32`]: https://doc.rust-lang.org/std/num/struct.NonZeroU32.html
247 [`num::NonZeroU64`]: https://doc.rust-lang.org/std/num/struct.NonZeroU64.html
248 [`num::NonZeroU8`]: https://doc.rust-lang.org/std/num/struct.NonZeroU8.html
249 [`ops::RangeBounds`]: https://doc.rust-lang.org/std/ops/trait.RangeBounds.html
250 [`slice::SliceIndex`]: https://doc.rust-lang.org/std/slice/trait.SliceIndex.html
251 [`slice::from_mut`]: https://doc.rust-lang.org/std/slice/fn.from_mut.html
252 [`slice::from_ref`]: https://doc.rust-lang.org/std/slice/fn.from_ref.html
253 [`{Any + Send + Sync}::downcast_mut`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_mut-2
254 [`{Any + Send + Sync}::downcast_ref`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_ref-2
255 [`{Any + Send + Sync}::is`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.is-2
257 Version 1.27.2 (2018-07-20)
258 ===========================
263 - The borrow checker was fixed to avoid potential unsoundness when using
264 match ergonomics: [#52213][52213].
266 [52213]: https://github.com/rust-lang/rust/issues/52213
268 Version 1.27.1 (2018-07-10)
269 ===========================
274 - rustdoc would execute plugins in the /tmp/rustdoc/plugins directory
275 when running, which enabled executing code as some other user on a
276 given machine. This release fixes that vulnerability; you can read
277 more about this on the [blog][rustdoc-sec]. The associated CVE is [CVE-2018-1000622].
279 Thank you to Red Hat for responsibily disclosing this vulnerability to us.
284 - The borrow checker was fixed to avoid an additional potential unsoundness when using
285 match ergonomics: [#51415][51415], [#49534][49534].
287 [51415]: https://github.com/rust-lang/rust/issues/51415
288 [49534]: https://github.com/rust-lang/rust/issues/49534
289 [rustdoc-sec]: https://blog.rust-lang.org/2018/07/06/security-advisory-for-rustdoc.html
290 [CVE-2018-1000622]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=%20CVE-2018-1000622
292 Version 1.27.0 (2018-06-21)
293 ==========================
297 - [Removed 'proc' from the reserved keywords list.][49699] This allows `proc` to
298 be used as an identifier.
299 - [The dyn syntax is now available.][49968] This syntax is equivalent to the
300 bare `Trait` syntax, and should make it clearer when being used in tandem with
301 `impl Trait`. Since it is equivalent to the following syntax:
302 `&Trait == &dyn Trait`, `&mut Trait == &mut dyn Trait`, and
303 `Box<Trait> == Box<dyn Trait>`.
304 - [Attributes on generic parameters such as types and lifetimes are
305 now stable.][48851] e.g.
306 `fn foo<#[lifetime_attr] 'a, #[type_attr] T: 'a>() {}`
307 - [The `#[must_use]` attribute can now also be used on functions as well as
308 types.][48925] It provides a lint that by default warns users when the
309 value returned by a function has not been used.
313 - [Added the `armv5te-unknown-linux-musleabi` target.][50423]
317 - [SIMD (Single Instruction Multiple Data) on x86/x86_64 is now stable.][49664]
318 This includes [`arch::x86`] & [`arch::x86_64`] modules which contain
319 SIMD intrinsics, a new macro called `is_x86_feature_detected!`, the
320 `#[target_feature(enable="")]` attribute, and adding `target_feature = ""` to
322 - [A lot of methods for `[u8]`, `f32`, and `f64` previously only available in
323 std are now available in core.][49896]
324 - [The generic `Rhs` type parameter on `ops::{Shl, ShlAssign, Shr}` now defaults
326 - [`std::str::replace` now has the `#[must_use]` attribute][50177] to clarify
327 that the operation isn't done in place.
328 - [`Clone::clone`, `Iterator::collect`, and `ToOwned::to_owned` now have
329 the `#[must_use]` attribute][49533] to warn about unused potentially
330 expensive allocations.
334 - [`DoubleEndedIterator::rfind`]
335 - [`DoubleEndedIterator::rfold`]
336 - [`DoubleEndedIterator::try_rfold`]
337 - [`Duration::from_micros`]
338 - [`Duration::from_nanos`]
339 - [`Duration::subsec_micros`]
340 - [`Duration::subsec_millis`]
341 - [`HashMap::remove_entry`]
342 - [`Iterator::try_fold`]
343 - [`Iterator::try_for_each`]
346 - [`String::replace_range`]
347 - [`Take::set_limit`]
348 - [`hint::unreachable_unchecked`]
349 - [`os::unix::process::parent_id`]
350 - [`ptr::swap_nonoverlapping`]
351 - [`slice::rsplit_mut`]
353 - [`slice::swap_with_slice`]
357 - [`cargo-metadata` now includes `authors`, `categories`, `keywords`,
358 `readme`, and `repository` fields.][cargo/5386]
359 - [`cargo-metadata` now includes a package's `metadata` table.][cargo/5360]
360 - [Added the `--target-dir` optional argument.][cargo/5393] This allows you to specify
361 a different directory than `target` for placing compilation artifacts.
362 - [Cargo will be adding automatic target inference for binaries, benchmarks,
363 examples, and tests in the Rust 2018 edition.][cargo/5335] If your project specifies
364 specific targets e.g. using `[[bin]]` and have other binaries in locations
365 where cargo would infer a binary, Cargo will produce a warning. You can
366 disable this feature ahead of time by setting any of the following `autobins`,
367 `autobenches`, `autoexamples`, `autotests` to false.
368 - [Cargo will now cache compiler information.][cargo/5359] This can be disabled by
369 setting `CARGO_CACHE_RUSTC_INFO=0` in your environment.
373 - [Added “The Rustc book” into the official documentation.][49707]
374 [“The Rustc book”] documents and teaches how to use the rustc compiler.
375 - [All books available on `doc.rust-lang.org` are now searchable.][49623]
379 - [Calling a `CharExt` or `StrExt` method directly on core will no longer
380 work.][49896] e.g. `::core::prelude::v1::StrExt::is_empty("")` will not
381 compile, `"".is_empty()` will still compile.
382 - [`Debug` output on `atomic::{AtomicBool, AtomicIsize, AtomicPtr, AtomicUsize}`
383 will only print the inner type.][48553] e.g.
384 `print!("{:?}", AtomicBool::new(true))` will print `true`
385 not `AtomicBool(true)`.
386 - [The maximum number for `repr(align(N))` is now 2²⁹.][50378] Previously you
387 could enter higher numbers but they were not supported by LLVM. Up to 512MB
388 alignment should cover all use cases.
389 - The `.description()` method on the `std::error::Error` trait
390 [has been soft-deprecated][50163]. It is no longer required to implement it.
392 [48553]: https://github.com/rust-lang/rust/pull/48553/
393 [48851]: https://github.com/rust-lang/rust/pull/48851/
394 [48925]: https://github.com/rust-lang/rust/pull/48925/
395 [49533]: https://github.com/rust-lang/rust/pull/49533/
396 [49623]: https://github.com/rust-lang/rust/pull/49623/
397 [49630]: https://github.com/rust-lang/rust/pull/49630/
398 [49664]: https://github.com/rust-lang/rust/pull/49664/
399 [49699]: https://github.com/rust-lang/rust/pull/49699/
400 [49707]: https://github.com/rust-lang/rust/pull/49707/
401 [49719]: https://github.com/rust-lang/rust/pull/49719/
402 [49896]: https://github.com/rust-lang/rust/pull/49896/
403 [49968]: https://github.com/rust-lang/rust/pull/49968/
404 [50163]: https://github.com/rust-lang/rust/pull/50163
405 [50177]: https://github.com/rust-lang/rust/pull/50177/
406 [50378]: https://github.com/rust-lang/rust/pull/50378/
407 [50398]: https://github.com/rust-lang/rust/pull/50398/
408 [50423]: https://github.com/rust-lang/rust/pull/50423/
409 [cargo/5203]: https://github.com/rust-lang/cargo/pull/5203/
410 [cargo/5335]: https://github.com/rust-lang/cargo/pull/5335/
411 [cargo/5359]: https://github.com/rust-lang/cargo/pull/5359/
412 [cargo/5360]: https://github.com/rust-lang/cargo/pull/5360/
413 [cargo/5386]: https://github.com/rust-lang/cargo/pull/5386/
414 [cargo/5393]: https://github.com/rust-lang/cargo/pull/5393/
415 [`DoubleEndedIterator::rfind`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfind
416 [`DoubleEndedIterator::rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfold
417 [`DoubleEndedIterator::try_rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.try_rfold
418 [`Duration::from_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_micros
419 [`Duration::from_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_nanos
420 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
421 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
422 [`HashMap::remove_entry`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.remove_entry
423 [`Iterator::try_fold`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_fold
424 [`Iterator::try_for_each`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_for_each
425 [`NonNull::cast`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.cast
426 [`Option::filter`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.filter
427 [`String::replace_range`]: https://doc.rust-lang.org/std/string/struct.String.html#method.replace_range
428 [`Take::set_limit`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.set_limit
429 [`hint::unreachable_unchecked`]: https://doc.rust-lang.org/std/hint/fn.unreachable_unchecked.html
430 [`os::unix::process::parent_id`]: https://doc.rust-lang.org/std/os/unix/process/fn.parent_id.html
431 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
432 [`ptr::swap_nonoverlapping`]: https://doc.rust-lang.org/std/ptr/fn.swap_nonoverlapping.html
433 [`slice::rsplit_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit_mut
434 [`slice::rsplit`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit
435 [`slice::swap_with_slice`]: https://doc.rust-lang.org/std/primitive.slice.html#method.swap_with_slice
436 [`arch::x86_64`]: https://doc.rust-lang.org/std/arch/x86_64/index.html
437 [`arch::x86`]: https://doc.rust-lang.org/std/arch/x86/index.html
438 [“The Rustc book”]: https://doc.rust-lang.org/rustc
441 Version 1.26.2 (2018-06-05)
442 ==========================
447 - [The borrow checker was fixed to avoid unsoundness when using match ergonomics][51117]
449 [51117]: https://github.com/rust-lang/rust/issues/51117
452 Version 1.26.1 (2018-05-29)
453 ==========================
458 - [RLS now works on Windows][50646]
459 - [Rustfmt stopped badly formatting text in some cases][rustfmt/2695]
465 - [`fn main() -> impl Trait` no longer works for non-Termination
467 This reverts an accidental stabilization.
468 - [`NaN > NaN` no longer returns true in const-fn contexts][50812]
469 - [Prohibit using turbofish for `impl Trait` in method arguments][50950]
471 [50646]: https://github.com/rust-lang/rust/issues/50646
472 [50656]: https://github.com/rust-lang/rust/pull/50656
473 [50812]: https://github.com/rust-lang/rust/pull/50812
474 [50950]: https://github.com/rust-lang/rust/issues/50950
475 [rustfmt/2695]: https://github.com/rust-lang-nursery/rustfmt/issues/2695
477 Version 1.26.0 (2018-05-10)
478 ==========================
482 - [Closures now implement `Copy` and/or `Clone` if all captured variables
483 implement either or both traits.][49299]
484 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
485 - [The `'_` lifetime is now stable. The underscore lifetime can be used anywhere where a
486 lifetime can be elided.][49458]
487 - [`impl Trait` is now stable allowing you to have abstract types in returns
488 or in function parameters.][49255] e.g. `fn foo() -> impl Iterator<Item=u8>` or
489 `fn open(path: impl AsRef<Path>)`.
490 - [Pattern matching will now automatically apply dereferences.][49394]
491 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
492 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
493 - [A lot of operations are now available in a const context.][46882] E.g. You
494 can now index into constant arrays, reference and dereference into constants,
495 and use Tuple struct constructors.
496 - [Fixed entry slice patterns are now stable.][48516] e.g.
498 let points = [1, 2, 3, 4];
500 [1, 2, 3, 4] => println!("All points were sequential."),
501 _ => println!("Not all points were sequential."),
508 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
509 - [Fixed exponential projection complexity on nested types.][48296]
510 This can provide up to a ~12% reduction in compile times for certain crates.
511 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
512 to remap path prefixes outputted by the compiler.
513 - [Added `powerpc-unknown-netbsd` target.][48281]
517 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
518 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
519 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
520 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
521 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
522 - [`ascii::escape_default` is now available in libcore.][48735]
523 - [Trailing commas are now supported in std and core macros.][48056]
524 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
525 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
530 - [`*const T::copy_to_nonoverlapping`]
531 - [`*const T::copy_to`]
532 - [`*const T::read_unaligned`]
533 - [`*const T::read_volatile`]
536 - [`*const T::wrapping_add`]
537 - [`*const T::wrapping_sub`]
539 - [`*mut T::copy_to_nonoverlapping`]
540 - [`*mut T::copy_to`]
541 - [`*mut T::read_unaligned`]
542 - [`*mut T::read_volatile`]
544 - [`*mut T::replace`]
547 - [`*mut T::wrapping_add`]
548 - [`*mut T::wrapping_sub`]
549 - [`*mut T::write_bytes`]
550 - [`*mut T::write_unaligned`]
551 - [`*mut T::write_volatile`]
554 - [`FromUtf8Error::as_bytes`]
555 - [`LocalKey::try_with`]
557 - [`btree_map::Entry::and_modify`]
558 - [`fs::read_to_string`]
561 - [`hash_map::Entry::and_modify`]
562 - [`iter::FusedIterator`]
563 - [`ops::RangeInclusive`]
564 - [`ops::RangeToInclusive`]
566 - [`slice::rotate_left`]
567 - [`slice::rotate_right`]
573 - [Cargo will now output path to custom commands when `-v` is
574 passed with `--list`][cargo/5041]
575 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
579 - [The second edition of "The Rust Programming Language" book is now recommended
580 over the first.][48404]
585 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
586 syntax is now invalid.
588 use std::ops::Fn as dyn;
589 fn g(_: Box<dyn(std::fmt::Debug)>) {}
591 - [The result of dereferences are no longer promoted to `'static`.][47408]
595 const PAIR: &(i32, i32) = &(0, 1);
596 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
599 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
600 - [`".e0"` will now no longer parse as `0.0` and will instead cause
602 - [Removed hoedown from rustdoc.][48274]
603 - [Bounds on higher-kinded lifetimes a hard error.][48326]
605 [46882]: https://github.com/rust-lang/rust/pull/46882
606 [47379]: https://github.com/rust-lang/rust/pull/47379
607 [47408]: https://github.com/rust-lang/rust/pull/47408
608 [47813]: https://github.com/rust-lang/rust/pull/47813
609 [48056]: https://github.com/rust-lang/rust/pull/48056
610 [48125]: https://github.com/rust-lang/rust/pull/48125
611 [48166]: https://github.com/rust-lang/rust/pull/48166
612 [48235]: https://github.com/rust-lang/rust/pull/48235
613 [48274]: https://github.com/rust-lang/rust/pull/48274
614 [48281]: https://github.com/rust-lang/rust/pull/48281
615 [48296]: https://github.com/rust-lang/rust/pull/48296
616 [48326]: https://github.com/rust-lang/rust/pull/48326
617 [48359]: https://github.com/rust-lang/rust/pull/48359
618 [48404]: https://github.com/rust-lang/rust/pull/48404
619 [48481]: https://github.com/rust-lang/rust/pull/48481
620 [48516]: https://github.com/rust-lang/rust/pull/48516
621 [48628]: https://github.com/rust-lang/rust/pull/48628
622 [48629]: https://github.com/rust-lang/rust/pull/48629
623 [48657]: https://github.com/rust-lang/rust/pull/48657
624 [48735]: https://github.com/rust-lang/rust/pull/48735
625 [48978]: https://github.com/rust-lang/rust/pull/48978
626 [49101]: https://github.com/rust-lang/rust/pull/49101
627 [49109]: https://github.com/rust-lang/rust/pull/49109
628 [49121]: https://github.com/rust-lang/rust/pull/49121
629 [49162]: https://github.com/rust-lang/rust/pull/49162
630 [49184]: https://github.com/rust-lang/rust/pull/49184
631 [49234]: https://github.com/rust-lang/rust/pull/49234
632 [49255]: https://github.com/rust-lang/rust/pull/49255
633 [49299]: https://github.com/rust-lang/rust/pull/49299
634 [49305]: https://github.com/rust-lang/rust/pull/49305
635 [49394]: https://github.com/rust-lang/rust/pull/49394
636 [49458]: https://github.com/rust-lang/rust/pull/49458
637 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
638 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
639 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
640 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
641 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
642 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
643 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
644 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
645 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
646 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
647 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
648 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
649 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
650 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
651 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
652 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
653 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
654 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
655 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
656 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
657 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
658 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
659 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
660 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
661 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
662 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
663 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
664 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
665 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
666 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
667 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
668 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
669 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
670 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
671 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
672 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
673 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
674 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
675 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
676 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
677 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
678 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
681 Version 1.25.0 (2018-03-29)
682 ==========================
686 - [The `#[repr(align(x))]` attribute is now stable.][47006] [RFC 1358]
687 - [You can now use nested groups of imports.][47948]
688 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
689 - [You can now have `|` at the start of a match arm.][47947] e.g.
697 | Foo::B => println!("AB"),
698 | Foo::C => println!("C"),
705 - [Upgraded to LLVM 6.][47828]
706 - [Added `-C lto=val` option.][47521]
707 - [Added `i586-unknown-linux-musl` target][47282]
711 - [Impl Send for `process::Command` on Unix.][47760]
712 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
713 - [`UnsafeCell::into_inner` is now safe.][47204]
714 - [Implement libstd for CloudABI.][47268]
715 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
716 - [Implement `AsRef<Path>` for Component][46985]
717 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
718 - [Moved `Duration` to libcore.][46666]
722 - [`Location::column`]
725 The following functions can now be used in a constant expression.
726 eg. `static MINUTE: Duration = Duration::from_secs(60);`
727 - [`Duration::new`][47300]
728 - [`Duration::from_secs`][47300]
729 - [`Duration::from_millis`][47300]
733 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
734 - [`cargo new` now defaults to creating a binary crate, instead of a
735 library crate.][cargo/5029]
739 - [Rust by example is now shipped with new releases][46196]
743 - [Deprecated `net::lookup_host`.][47510]
744 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
745 - The borrow checker was sometimes incorrectly permitting overlapping borrows
746 around indexing operations (see [#47349][47349]). This has been fixed (which also
747 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
748 - [Removed deprecated unstable attribute `#[simd]`.][47251]
750 [33903]: https://github.com/rust-lang/rust/pull/33903
751 [47947]: https://github.com/rust-lang/rust/pull/47947
752 [47948]: https://github.com/rust-lang/rust/pull/47948
753 [47760]: https://github.com/rust-lang/rust/pull/47760
754 [47790]: https://github.com/rust-lang/rust/pull/47790
755 [47828]: https://github.com/rust-lang/rust/pull/47828
756 [47398]: https://github.com/rust-lang/rust/pull/47398
757 [47510]: https://github.com/rust-lang/rust/pull/47510
758 [47521]: https://github.com/rust-lang/rust/pull/47521
759 [47204]: https://github.com/rust-lang/rust/pull/47204
760 [47251]: https://github.com/rust-lang/rust/pull/47251
761 [47268]: https://github.com/rust-lang/rust/pull/47268
762 [47282]: https://github.com/rust-lang/rust/pull/47282
763 [47300]: https://github.com/rust-lang/rust/pull/47300
764 [47349]: https://github.com/rust-lang/rust/pull/47349
765 [46931]: https://github.com/rust-lang/rust/pull/46931
766 [46985]: https://github.com/rust-lang/rust/pull/46985
767 [47006]: https://github.com/rust-lang/rust/pull/47006
768 [46830]: https://github.com/rust-lang/rust/pull/46830
769 [46095]: https://github.com/rust-lang/rust/pull/46095
770 [46666]: https://github.com/rust-lang/rust/pull/46666
771 [46196]: https://github.com/rust-lang/rust/pull/46196
772 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
773 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
774 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
775 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
776 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
779 Version 1.24.1 (2018-03-01)
780 ==========================
782 - [Do not abort when unwinding through FFI][48251]
783 - [Emit UTF-16 files for linker arguments on Windows][48318]
784 - [Make the error index generator work again][48308]
785 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
787 [48251]: https://github.com/rust-lang/rust/issues/48251
788 [48308]: https://github.com/rust-lang/rust/issues/48308
789 [48318]: https://github.com/rust-lang/rust/issues/48318
790 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
793 Version 1.24.0 (2018-02-15)
794 ==========================
798 - [External `sysv64` ffi is now available.][46528]
799 eg. `extern "sysv64" fn foo () {}`
803 - [rustc now uses 16 codegen units by default for release builds.][46910]
804 For the fastest builds, utilize `codegen-units=1`.
805 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
806 - [Add `aarch64-unknown-openbsd` support][46760]
810 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
811 improvement in performance in the majority of cases.
812 - [`OsStr`'s `Debug` implementation is now lossless and consistent
813 with Windows.][46798]
814 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
815 - [impl `From<bool>` for `AtomicBool`][46293]
816 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
817 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
818 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
819 - [float::from_bits now just uses transmute.][46012] This provides
820 some optimisations from LLVM.
821 - [Copied `AsciiExt` methods onto `char`][46077]
822 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
823 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
824 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
825 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
829 - [`RefCell::replace`]
831 - [`atomic::spin_loop_hint`]
833 The following functions can now be used in a constant expression.
834 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
836 - [`AtomicBool::new`][46287]
837 - [`AtomicUsize::new`][46287]
838 - [`AtomicIsize::new`][46287]
839 - [`AtomicPtr::new`][46287]
840 - [`Cell::new`][46287]
841 - [`{integer}::min_value`][46287]
842 - [`{integer}::max_value`][46287]
843 - [`mem::size_of`][46287]
844 - [`mem::align_of`][46287]
845 - [`ptr::null`][46287]
846 - [`ptr::null_mut`][46287]
847 - [`RefCell::new`][46287]
848 - [`UnsafeCell::new`][46287]
852 - [Added a `workspace.default-members` config that
853 overrides implied `--all` in virtual workspaces.][cargo/4743]
854 - [Enable incremental by default on development builds.][cargo/4817] Also added
855 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
856 per-project or global basis respectively.
863 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
864 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
865 in accordance with IETF RFC 4291 §2.2.
866 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
867 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
868 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
869 - [Leading zeros in tuple struct members is now an error][47084]
870 - [`column!()` macro is one-based instead of zero-based][46977]
871 - [`fmt::Arguments` can no longer be shared across threads][45198]
872 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
873 - [Cargo sets a different working directory for the compiler][cargo/4788]
875 [44884]: https://github.com/rust-lang/rust/pull/44884
876 [45198]: https://github.com/rust-lang/rust/pull/45198
877 [45506]: https://github.com/rust-lang/rust/pull/45506
878 [45904]: https://github.com/rust-lang/rust/pull/45904
879 [45990]: https://github.com/rust-lang/rust/pull/45990
880 [46012]: https://github.com/rust-lang/rust/pull/46012
881 [46077]: https://github.com/rust-lang/rust/pull/46077
882 [46094]: https://github.com/rust-lang/rust/pull/46094
883 [46284]: https://github.com/rust-lang/rust/pull/46284
884 [46287]: https://github.com/rust-lang/rust/pull/46287
885 [46293]: https://github.com/rust-lang/rust/pull/46293
886 [46528]: https://github.com/rust-lang/rust/pull/46528
887 [46671]: https://github.com/rust-lang/rust/pull/46671
888 [46713]: https://github.com/rust-lang/rust/pull/46713
889 [46735]: https://github.com/rust-lang/rust/pull/46735
890 [46749]: https://github.com/rust-lang/rust/pull/46749
891 [46760]: https://github.com/rust-lang/rust/pull/46760
892 [46798]: https://github.com/rust-lang/rust/pull/46798
893 [46828]: https://github.com/rust-lang/rust/pull/46828
894 [46831]: https://github.com/rust-lang/rust/pull/46831
895 [46833]: https://github.com/rust-lang/rust/pull/46833
896 [46910]: https://github.com/rust-lang/rust/pull/46910
897 [46977]: https://github.com/rust-lang/rust/pull/46977
898 [47018]: https://github.com/rust-lang/rust/pull/47018
899 [47080]: https://github.com/rust-lang/rust/pull/47080
900 [47084]: https://github.com/rust-lang/rust/pull/47084
901 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
902 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
903 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
904 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
905 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
906 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
909 Version 1.23.0 (2018-01-04)
910 ==========================
914 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
915 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
916 Which should fix some confusing errors in some operations.
920 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
921 undefined behaviour.][45920]
922 - [rustc now suggests renaming import if names clash.][45660]
923 - [Display errors/warnings correctly when there are zero-width or
924 wide characters.][45711]
925 - [rustc now avoids unnecessary copies of arguments that are
926 simple bindings][45380] This should improve memory usage on average by 5-10%.
927 - [Updated musl used to build musl rustc to 1.1.17][45393]
931 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
932 - [Implement Hash for raw pointers to unsized types][45483]
933 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
934 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
935 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
936 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
937 and `<*mut T>::as_mut`][44932]
938 - [Optimized `Thread::{park, unpark}` implementation][45524]
939 - [Improved `SliceExt::binary_search` performance.][45333]
940 - [impl `FromIterator<()>` for `()`][45379]
941 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
949 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
950 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
951 - [Added unit test checking to `cargo check`][cargo/4592]
952 - [Cargo now lets you install a specific version
953 using `cargo install --version`][cargo/4637]
957 - [Releases now ship with the Cargo book documentation.][45692]
958 - [rustdoc now prints rendering warnings on every run.][45324]
962 - [Changes have been made to type equality to make it more correct,
963 in rare cases this could break some code.][45853] [Tracking issue for
964 further information][45852]
965 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
966 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
967 Android 9, the minimum supported version is Android 14.
968 - [Bumped the minimum LLVM to 3.9][45326]
970 [44042]: https://github.com/rust-lang/rust/pull/44042
971 [44932]: https://github.com/rust-lang/rust/pull/44932
972 [45267]: https://github.com/rust-lang/rust/pull/45267
973 [45324]: https://github.com/rust-lang/rust/pull/45324
974 [45326]: https://github.com/rust-lang/rust/pull/45326
975 [45333]: https://github.com/rust-lang/rust/pull/45333
976 [45379]: https://github.com/rust-lang/rust/pull/45379
977 [45380]: https://github.com/rust-lang/rust/pull/45380
978 [45393]: https://github.com/rust-lang/rust/pull/45393
979 [45435]: https://github.com/rust-lang/rust/pull/45435
980 [45483]: https://github.com/rust-lang/rust/pull/45483
981 [45524]: https://github.com/rust-lang/rust/pull/45524
982 [45571]: https://github.com/rust-lang/rust/pull/45571
983 [45580]: https://github.com/rust-lang/rust/pull/45580
984 [45610]: https://github.com/rust-lang/rust/pull/45610
985 [45660]: https://github.com/rust-lang/rust/pull/45660
986 [45692]: https://github.com/rust-lang/rust/pull/45692
987 [45711]: https://github.com/rust-lang/rust/pull/45711
988 [45772]: https://github.com/rust-lang/rust/pull/45772
989 [45852]: https://github.com/rust-lang/rust/issues/45852
990 [45853]: https://github.com/rust-lang/rust/pull/45853
991 [45887]: https://github.com/rust-lang/rust/pull/45887
992 [45920]: https://github.com/rust-lang/rust/pull/45920
993 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
994 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
995 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
998 Version 1.22.1 (2017-11-22)
999 ==========================
1001 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
1003 [46183]: https://github.com/rust-lang/rust/pull/46183
1005 Version 1.22.0 (2017-11-22)
1006 ==========================
1010 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
1011 - [Now accepts underscores in unicode escapes][43716]
1012 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
1013 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
1017 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
1018 - [rustc will no longer inline in codegen units when compiling for debug][45075]
1019 This should decrease compile times for debug builds.
1020 - [strict memory alignment now enabled on ARMv6][45094]
1021 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
1025 - [Allow atomic operations up to 32 bits
1026 on `armv5te_unknown_linux_gnueabi`][44978]
1027 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
1028 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
1029 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
1030 - [Properly detect overflow in `Instant += Duration`.][44220]
1031 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
1032 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
1033 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
1040 - [Cargo will now build multi file examples in subdirectories of the `examples`
1041 folder that have a `main.rs` file.][cargo/4496]
1042 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
1043 the old format will continue to work and can be updated with `cargo update`.
1044 - [Now supports vendoring git repositories][cargo/3992]
1048 - [`libbacktrace` is now available on Apple platforms.][44251]
1049 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
1050 This now lets you specify that a given code example will fail to compile.
1054 - [The minimum Android version that rustc can build for has been bumped
1055 to `4.0` from `2.3`][45656]
1056 - [Allowing `T op= &T` for numeric types has broken some type
1057 inference cases][45480]
1060 [42526]: https://github.com/rust-lang/rust/pull/42526
1061 [43017]: https://github.com/rust-lang/rust/pull/43017
1062 [43716]: https://github.com/rust-lang/rust/pull/43716
1063 [43949]: https://github.com/rust-lang/rust/pull/43949
1064 [44015]: https://github.com/rust-lang/rust/pull/44015
1065 [44220]: https://github.com/rust-lang/rust/pull/44220
1066 [44251]: https://github.com/rust-lang/rust/pull/44251
1067 [44287]: https://github.com/rust-lang/rust/pull/44287
1068 [44303]: https://github.com/rust-lang/rust/pull/44303
1069 [44456]: https://github.com/rust-lang/rust/pull/44456
1070 [44466]: https://github.com/rust-lang/rust/pull/44466
1071 [44895]: https://github.com/rust-lang/rust/pull/44895
1072 [44966]: https://github.com/rust-lang/rust/pull/44966
1073 [44978]: https://github.com/rust-lang/rust/pull/44978
1074 [45041]: https://github.com/rust-lang/rust/pull/45041
1075 [45064]: https://github.com/rust-lang/rust/pull/45064
1076 [45075]: https://github.com/rust-lang/rust/pull/45075
1077 [45094]: https://github.com/rust-lang/rust/pull/45094
1078 [45095]: https://github.com/rust-lang/rust/pull/45095
1079 [45480]: https://github.com/rust-lang/rust/issues/45480
1080 [45656]: https://github.com/rust-lang/rust/pull/45656
1081 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
1082 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
1083 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
1090 Version 1.21.0 (2017-10-12)
1091 ==========================
1095 - [You can now use static references for literals.][43838]
1099 let x: &'static u32 = &0;
1102 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
1105 my_macro!(Vec<i32>::new); // Always worked
1106 my_macro!(Vec::<i32>::new); // Now works
1111 - [Upgraded jemalloc to 4.5.0][43911]
1112 - [Enabled unwinding panics on Redox][43917]
1113 - [Now runs LLVM in parallel during translation phase.][43506]
1114 This should reduce peak memory usage.
1118 - [Generate builtin impls for `Clone` for all arrays and tuples that
1119 are `T: Clone`][43690]
1120 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
1121 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
1122 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
1127 [`std::mem::discriminant`]
1131 - [You can now call `cargo install` with multiple package names][cargo/4216]
1132 - [Cargo commands inside a virtual workspace will now implicitly
1133 pass `--all`][cargo/4335]
1134 - [Added a `[patch]` section to `Cargo.toml` to handle
1135 prepublication dependencies][cargo/4123] [RFC 1969]
1136 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
1137 like patterns][cargo/4270]
1138 - [Added the `--all-targets` option][cargo/4400]
1139 - [Using required dependencies as a feature is now deprecated and emits
1140 a warning][cargo/4364]
1145 - [Cargo docs are moving][43916]
1146 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
1147 - [The rustdoc book is now available][43863]
1148 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
1149 - [Added a preview of RLS has been made available through rustup][44204]
1150 Install with `rustup component add rls-preview`
1151 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
1152 Previously only showed `std::os::unix`.
1156 - [Changes in method matching against higher-ranked types][43880] This may cause
1157 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
1158 - [rustc's JSON error output's byte position start at top of file.][42973]
1159 Was previously relative to the rustc's internal `CodeMap` struct which
1160 required the unstable library `libsyntax` to correctly use.
1161 - [`unused_results` lint no longer ignores booleans][43728]
1163 [42565]: https://github.com/rust-lang/rust/pull/42565
1164 [42973]: https://github.com/rust-lang/rust/pull/42973
1165 [43348]: https://github.com/rust-lang/rust/pull/43348
1166 [43459]: https://github.com/rust-lang/rust/pull/43459
1167 [43506]: https://github.com/rust-lang/rust/pull/43506
1168 [43540]: https://github.com/rust-lang/rust/pull/43540
1169 [43690]: https://github.com/rust-lang/rust/pull/43690
1170 [43728]: https://github.com/rust-lang/rust/pull/43728
1171 [43838]: https://github.com/rust-lang/rust/pull/43838
1172 [43863]: https://github.com/rust-lang/rust/pull/43863
1173 [43880]: https://github.com/rust-lang/rust/pull/43880
1174 [43911]: https://github.com/rust-lang/rust/pull/43911
1175 [43916]: https://github.com/rust-lang/rust/pull/43916
1176 [43917]: https://github.com/rust-lang/rust/pull/43917
1177 [44204]: https://github.com/rust-lang/rust/pull/44204
1178 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
1179 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
1180 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1181 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
1182 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
1183 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
1184 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
1185 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
1186 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
1188 Version 1.20.0 (2017-08-31)
1189 ===========================
1193 - [Associated constants are now stabilised.][42809]
1194 - [A lot of macro bugs are now fixed.][42913]
1199 - [Struct fields are now properly coerced to the expected field type.][42807]
1200 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
1201 `wasm32-experimental-emscripten` target.
1202 - [Changed some of the error messages to be more helpful.][42033]
1203 - [Add support for RELRO(RELocation Read-Only) for platforms that support
1205 - [rustc now reports the total number of errors on compilation failure][43015]
1206 previously this was only the number of errors in the pass that failed.
1207 - [Expansion in rustc has been sped up 29x.][42533]
1208 - [added `msp430-none-elf` target.][43099]
1209 - [rustc will now suggest one-argument enum variant to fix type mismatch when
1211 - [Fixes backtraces on Redox][43228]
1212 - [rustc now identifies different versions of same crate when absolute paths of
1213 different types match in an error message.][42826]
1219 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
1220 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
1222 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
1223 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
1224 - [Impl `Clone` for `DefaultHasher`.][42799]
1225 - [Impl `Sync` for `SyncSender`.][42397]
1226 - [Impl `FromStr` for `char`][42271]
1227 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
1229 - [allow messages in the `unimplemented!()` macro.][42155]
1230 ie. `unimplemented!("Waiting for 1.21 to be stable")`
1231 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
1232 - [Upgrade to Unicode 10.0.0][42999]
1233 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
1234 - [Skip the main thread's manual stack guard on Linux][43072]
1235 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
1236 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
1238 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
1243 - [`CStr::into_c_string`]
1244 - [`CString::as_c_str`]
1245 - [`CString::into_boxed_c_str`]
1246 - [`Chain::get_mut`]
1247 - [`Chain::get_ref`]
1248 - [`Chain::into_inner`]
1249 - [`Option::get_or_insert_with`]
1250 - [`Option::get_or_insert`]
1251 - [`OsStr::into_os_string`]
1252 - [`OsString::into_boxed_os_str`]
1255 - [`Utf8Error::error_len`]
1256 - [`char::EscapeDebug`]
1257 - [`char::escape_debug`]
1258 - [`compile_error!`]
1259 - [`f32::from_bits`]
1261 - [`f64::from_bits`]
1263 - [`mem::ManuallyDrop`]
1264 - [`slice::sort_unstable_by_key`]
1265 - [`slice::sort_unstable_by`]
1266 - [`slice::sort_unstable`]
1267 - [`str::from_boxed_utf8_unchecked`]
1268 - [`str::as_bytes_mut`]
1269 - [`str::as_bytes_mut`]
1270 - [`str::from_utf8_mut`]
1271 - [`str::from_utf8_unchecked_mut`]
1273 - [`str::get_unchecked_mut`]
1274 - [`str::get_unchecked`]
1276 - [`str::into_boxed_bytes`]
1281 - [Cargo API token location moved from `~/.cargo/config` to
1282 `~/.cargo/credentials`.][cargo/3978]
1283 - [Cargo will now build `main.rs` binaries that are in sub-directories of
1284 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
1285 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
1286 - [You can now specify version of a binary when installed through
1287 `cargo install` using `--vers`.][cargo/4229]
1288 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
1289 failure.][cargo/4248]
1290 - [Changed the convention around which file is the crate root.][cargo/4259]
1291 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
1292 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
1297 - [Functions with `'static` in their return types will now not be as usable as
1298 if they were using lifetime parameters instead.][42417]
1299 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
1300 takes the sign of NaN into account where previously didn't.][42430]
1302 [42033]: https://github.com/rust-lang/rust/pull/42033
1303 [42155]: https://github.com/rust-lang/rust/pull/42155
1304 [42271]: https://github.com/rust-lang/rust/pull/42271
1305 [42397]: https://github.com/rust-lang/rust/pull/42397
1306 [42417]: https://github.com/rust-lang/rust/pull/42417
1307 [42430]: https://github.com/rust-lang/rust/pull/42430
1308 [42431]: https://github.com/rust-lang/rust/pull/42431
1309 [42533]: https://github.com/rust-lang/rust/pull/42533
1310 [42571]: https://github.com/rust-lang/rust/pull/42571
1311 [42613]: https://github.com/rust-lang/rust/pull/42613
1312 [42799]: https://github.com/rust-lang/rust/pull/42799
1313 [42807]: https://github.com/rust-lang/rust/pull/42807
1314 [42809]: https://github.com/rust-lang/rust/pull/42809
1315 [42822]: https://github.com/rust-lang/rust/pull/42822
1316 [42826]: https://github.com/rust-lang/rust/pull/42826
1317 [42854]: https://github.com/rust-lang/rust/pull/42854
1318 [42913]: https://github.com/rust-lang/rust/pull/42913
1319 [42999]: https://github.com/rust-lang/rust/pull/42999
1320 [43011]: https://github.com/rust-lang/rust/pull/43011
1321 [43015]: https://github.com/rust-lang/rust/pull/43015
1322 [43072]: https://github.com/rust-lang/rust/pull/43072
1323 [43077]: https://github.com/rust-lang/rust/pull/43077
1324 [43097]: https://github.com/rust-lang/rust/pull/43097
1325 [43099]: https://github.com/rust-lang/rust/pull/43099
1326 [43170]: https://github.com/rust-lang/rust/pull/43170
1327 [43178]: https://github.com/rust-lang/rust/pull/43178
1328 [43185]: https://github.com/rust-lang/rust/pull/43185
1329 [43228]: https://github.com/rust-lang/rust/pull/43228
1330 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
1331 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
1332 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
1333 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
1334 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
1335 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1336 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
1337 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
1338 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
1339 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
1340 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
1341 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
1342 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
1343 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
1344 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
1345 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
1346 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
1347 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
1348 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
1349 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
1350 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
1351 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
1352 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
1353 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
1354 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
1355 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
1356 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
1357 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
1358 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
1359 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
1360 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
1361 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
1362 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
1363 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
1364 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
1365 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
1366 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
1367 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
1368 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
1371 Version 1.19.0 (2017-07-20)
1372 ===========================
1377 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
1378 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
1379 - [Macro recursion limit increased to 1024 from 64.][41676]
1380 - [Added lint for detecting unused macros.][41907]
1381 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
1382 For example: `let x = loop { break 7; };`
1383 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
1384 contain `Copy` types and cannot have a `Drop` implementation.
1385 Example: `union Foo { bar: u8, baz: usize }`
1386 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
1387 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
1392 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
1393 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
1394 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
1395 you should use `--target armv7-linux-androideabi`.
1396 - [Fixed ICE when removing a source file between compilation sessions.][41873]
1397 - [Minor optimisation of string operations.][42037]
1398 - [Compiler error message is now `aborting due to previous error(s)` instead of
1399 `aborting due to N previous errors`][42150] This was previously inaccurate and
1400 would only count certain kinds of errors.
1401 - [The compiler now supports Visual Studio 2017][42225]
1402 - [The compiler is now built against LLVM 4.0.1 by default][42948]
1403 - [Added a lot][42264] of [new error codes][42302]
1404 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
1405 libraries with C Run-time Libraries(CRT) to be statically linked.
1406 - [Fixed various ARM codegen bugs][42740]
1411 - [`String` now implements `FromIterator<Cow<'a, str>>` and
1412 `Extend<Cow<'a, str>>`][41449]
1413 - [`Vec` now implements `From<&mut [T]>`][41530]
1414 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
1415 - [`SplitWhitespace` now implements `Clone`][41659]
1416 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
1418 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
1419 macros, but for printing to stderr.
1424 - [`OsString::shrink_to_fit`]
1427 - [`thread::ThreadId`]
1432 - [Build scripts can now add environment variables to the environment
1433 the crate is being compiled in.
1434 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
1435 - [Subcommands now replace the current process rather than spawning a new
1436 child process][cargo/3970]
1437 - [Workspace members can now accept glob file patterns][cargo/3979]
1438 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
1439 the members in a given workspace.][cargo/3988]
1440 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
1441 - [Target directory path is now in the cargo metadata][cargo/4022]
1442 - [Cargo no longer checks out a local working directory for the
1443 crates.io index][cargo/4026] This should provide smaller file size for the
1444 registry, and improve cloning times, especially on Windows machines.
1445 - [Added an `--exclude` option for excluding certain packages when using the
1446 `--all` option][cargo/4031]
1447 - [Cargo will now automatically retry when receiving a 5xx error
1448 from crates.io][cargo/4032]
1449 - [The `--features` option now accepts multiple comma or space
1450 delimited values.][cargo/4084]
1451 - [Added support for custom target specific runners][cargo/3954]
1456 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
1458 - [Rust will now release XZ compressed packages][rust-installer/57]
1459 - [rustup will now prefer to download rust packages with
1460 XZ compression][rustup/1100] over GZip packages.
1461 - [Added the ability to escape `#` in rust documentation][41785] By adding
1462 additional `#`'s ie. `##` is now `#`
1467 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
1468 - [`-Z` flags are now no longer allowed to be used on the stable
1469 compiler.][41751] This has been a warning for a year previous to this.
1470 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
1471 longer works][42844]. Users should migrate to the built-in `check`
1472 command, which has been available since 1.16.
1473 - [Ending a float literal with `._` is now a hard error.
1474 Example: `42._` .][41946]
1475 - [Any use of a private `extern crate` outside of its module is now a
1476 hard error.][36886] This was previously a warning.
1477 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
1478 relative while the `::` prefix makes a path absolute, but was ignored and the
1479 path was relative regardless.
1480 - [Floating point constants in match patterns is now a hard error][36890]
1481 This was previously a warning.
1482 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
1483 match patterns is now a hard error][36891] This was previously a warning.
1484 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
1486 - [From the pound escape, lines consisting of multiple `#`s are
1488 - [It is an error to re-export private enum variants][42460]. This is
1489 known to break a number of crates that depend on an older version of
1491 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
1492 to use it to find the linker, and the build will fail where it did
1493 not previously][42607]
1495 [36886]: https://github.com/rust-lang/rust/issues/36886
1496 [36888]: https://github.com/rust-lang/rust/issues/36888
1497 [36890]: https://github.com/rust-lang/rust/issues/36890
1498 [36891]: https://github.com/rust-lang/rust/issues/36891
1499 [36892]: https://github.com/rust-lang/rust/issues/36892
1500 [37406]: https://github.com/rust-lang/rust/issues/37406
1501 [39983]: https://github.com/rust-lang/rust/pull/39983
1502 [41145]: https://github.com/rust-lang/rust/pull/41145
1503 [41192]: https://github.com/rust-lang/rust/pull/41192
1504 [41258]: https://github.com/rust-lang/rust/pull/41258
1505 [41370]: https://github.com/rust-lang/rust/pull/41370
1506 [41449]: https://github.com/rust-lang/rust/pull/41449
1507 [41530]: https://github.com/rust-lang/rust/pull/41530
1508 [41624]: https://github.com/rust-lang/rust/pull/41624
1509 [41656]: https://github.com/rust-lang/rust/pull/41656
1510 [41659]: https://github.com/rust-lang/rust/pull/41659
1511 [41676]: https://github.com/rust-lang/rust/pull/41676
1512 [41751]: https://github.com/rust-lang/rust/pull/41751
1513 [41764]: https://github.com/rust-lang/rust/pull/41764
1514 [41785]: https://github.com/rust-lang/rust/pull/41785
1515 [41873]: https://github.com/rust-lang/rust/pull/41873
1516 [41907]: https://github.com/rust-lang/rust/pull/41907
1517 [41946]: https://github.com/rust-lang/rust/pull/41946
1518 [42016]: https://github.com/rust-lang/rust/pull/42016
1519 [42037]: https://github.com/rust-lang/rust/pull/42037
1520 [42068]: https://github.com/rust-lang/rust/pull/42068
1521 [42150]: https://github.com/rust-lang/rust/pull/42150
1522 [42162]: https://github.com/rust-lang/rust/pull/42162
1523 [42225]: https://github.com/rust-lang/rust/pull/42225
1524 [42264]: https://github.com/rust-lang/rust/pull/42264
1525 [42302]: https://github.com/rust-lang/rust/pull/42302
1526 [42460]: https://github.com/rust-lang/rust/issues/42460
1527 [42607]: https://github.com/rust-lang/rust/issues/42607
1528 [42740]: https://github.com/rust-lang/rust/pull/42740
1529 [42844]: https://github.com/rust-lang/rust/issues/42844
1530 [42948]: https://github.com/rust-lang/rust/pull/42948
1531 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
1532 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
1533 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
1534 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
1535 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
1536 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
1537 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
1538 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
1539 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
1540 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
1541 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
1542 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
1543 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
1544 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
1545 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
1546 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
1547 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
1548 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
1549 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
1550 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
1551 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
1552 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
1555 Version 1.18.0 (2017-06-08)
1556 ===========================
1561 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
1562 make the item visible to just that module tree. Also accepts the keyword
1563 `crate` to make something public to the whole crate but not users of the
1564 library. Example: `pub(crate) mod utils;`. [RFC 1422].
1565 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
1566 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
1567 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
1568 types like `Write + Send`, trailing `+` are now supported in trait objects,
1569 and better error reporting for trait objects starting with `?Sized`.
1570 - [0e+10 is now a valid floating point literal][40589]
1571 - [Now warns if you bind a lifetime parameter to 'static][40734]
1572 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
1573 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
1574 representation in some cases.][40377]
1579 - [rustc can now emit mir with `--emit mir`][39891]
1580 - [Improved LLVM IR for trivial functions][40367]
1581 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
1582 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
1583 opportunities found through profiling
1584 - [Improved backtrace formatting when panicking][38165]
1589 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
1590 iterator hasn't been advanced the original `Vec` is reassembled with no actual
1591 iteration or reallocation.
1592 - [Simplified HashMap Bucket interface][40561] provides performance
1593 improvements for iterating and cloning.
1594 - [Specialize Vec::from_elem to use calloc][40409]
1595 - [Fixed Race condition in fs::create_dir_all][39799]
1596 - [No longer caching stdio on Windows][40516]
1597 - [Optimized insertion sort in slice][40807] insertion sort in some cases
1598 2.50%~ faster and in one case now 12.50% faster.
1599 - [Optimized `AtomicBool::fetch_nand`][41143]
1604 - [`Child::try_wait`]
1605 - [`HashMap::retain`]
1606 - [`HashSet::retain`]
1608 - [`TcpStream::peek`]
1609 - [`UdpSocket::peek`]
1610 - [`UdpSocket::peek_from`]
1615 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
1616 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
1617 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
1618 - [Added Android build support][cargo/3885]
1619 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
1620 of a certain type, for example `cargo build --bins` will build all
1622 - [Added support for haiku][cargo/3952]
1627 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
1628 - [Added rust-windbg script for better debugging on Windows][39983]
1629 - [Rust now uses the official cross compiler for NetBSD][40612]
1630 - [rustdoc now accepts `#` at the start of files][40828]
1631 - [Fixed jemalloc support for musl][41168]
1636 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
1637 always placed after the sign if it exists and before the digits. With the `#`
1638 flag the zeroes are placed after the prefix and before the digits.
1639 - [Due to the struct field optimisation][40377], using `transmute` on structs
1640 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
1641 always been undefined behavior, but is now more likely to break in practice.
1642 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
1643 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
1644 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
1645 - [Overlapping inherent `impl`s are now a hard error][40728]
1646 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
1647 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
1648 `out.asm` and `out.ll` instead of only one of the filetypes.
1649 - [ calling a function that returns `Self` will no longer work][41805] when
1650 the size of `Self` cannot be statically determined.
1651 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
1652 this has caused a few regressions namely:
1654 - Changed the link order of local static/dynamic libraries (respecting the
1655 order on given rather than having the compiler reorder).
1656 - Changed how MinGW is linked, native code linked to dynamic libraries
1657 may require manually linking to the gcc support library (for the native
1660 [38165]: https://github.com/rust-lang/rust/pull/38165
1661 [39799]: https://github.com/rust-lang/rust/pull/39799
1662 [39891]: https://github.com/rust-lang/rust/pull/39891
1663 [39983]: https://github.com/rust-lang/rust/pull/39983
1664 [40043]: https://github.com/rust-lang/rust/pull/40043
1665 [40241]: https://github.com/rust-lang/rust/pull/40241
1666 [40338]: https://github.com/rust-lang/rust/pull/40338
1667 [40367]: https://github.com/rust-lang/rust/pull/40367
1668 [40377]: https://github.com/rust-lang/rust/pull/40377
1669 [40409]: https://github.com/rust-lang/rust/pull/40409
1670 [40516]: https://github.com/rust-lang/rust/pull/40516
1671 [40556]: https://github.com/rust-lang/rust/pull/40556
1672 [40561]: https://github.com/rust-lang/rust/pull/40561
1673 [40589]: https://github.com/rust-lang/rust/pull/40589
1674 [40612]: https://github.com/rust-lang/rust/pull/40612
1675 [40723]: https://github.com/rust-lang/rust/pull/40723
1676 [40728]: https://github.com/rust-lang/rust/pull/40728
1677 [40731]: https://github.com/rust-lang/rust/pull/40731
1678 [40734]: https://github.com/rust-lang/rust/pull/40734
1679 [40805]: https://github.com/rust-lang/rust/pull/40805
1680 [40807]: https://github.com/rust-lang/rust/pull/40807
1681 [40828]: https://github.com/rust-lang/rust/pull/40828
1682 [40870]: https://github.com/rust-lang/rust/pull/40870
1683 [41085]: https://github.com/rust-lang/rust/pull/41085
1684 [41143]: https://github.com/rust-lang/rust/pull/41143
1685 [41168]: https://github.com/rust-lang/rust/pull/41168
1686 [41270]: https://github.com/rust-lang/rust/issues/41270
1687 [41469]: https://github.com/rust-lang/rust/pull/41469
1688 [41805]: https://github.com/rust-lang/rust/issues/41805
1689 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
1690 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
1691 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
1692 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
1693 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
1694 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
1695 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
1696 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
1697 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
1698 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
1699 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
1700 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
1701 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
1702 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
1705 Version 1.17.0 (2017-04-27)
1706 ===========================
1711 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
1712 * [Fields of structs may be initialized without duplicating the field/variable
1713 names][39761]. [RFC 1682]
1714 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
1715 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1716 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
1717 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
1718 `'b`. Soundness fix.
1719 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
1720 * [Static variables may contain references to other statics][40027]
1725 * [Exit quickly on only `--emit dep-info`][40336]
1726 * [Make `-C relocation-model` more correctly determine whether the linker
1727 creates a position-independent executable][40245]
1728 * [Add `-C overflow-checks` to directly control whether integer overflow
1730 * [The rustc type checker now checks items on demand instead of in a single
1731 in-order pass][40008]. This is mostly an internal refactoring in support of
1732 future work, including incremental type checking, but also resolves [RFC
1733 1647], allowing `Self` to appear in `impl` `where` clauses.
1734 * [Optimize vtable loads][39995]
1735 * [Turn off vectorization for Emscripten targets][39990]
1736 * [Provide suggestions for unknown macros imported with `use`][39953]
1737 * [Fix ICEs in path resolution][39939]
1738 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
1739 * [Add clearer error message using `&str + &str`][39116]
1750 * [`Ordering::then`]
1751 * [`Ordering::then_with`]
1752 * [`BTreeMap::range`]
1753 * [`BTreeMap::range_mut`]
1754 * [`collections::Bound`]
1755 * [`process::abort`]
1756 * [`ptr::read_unaligned`]
1757 * [`ptr::write_unaligned`]
1758 * [`Result::expect_err`]
1761 * [`Cell::into_inner`]
1767 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
1768 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
1769 * [`String` implements `FromIterator<&char>`][40028]
1770 * `Box` [implements][40009] a number of new conversions:
1771 `From<Box<str>> for String`,
1772 `From<Box<[T]>> for Vec<T>`,
1773 `From<Box<CStr>> for CString`,
1774 `From<Box<OsStr>> for OsString`,
1775 `From<Box<Path>> for PathBuf`,
1776 `Into<Box<str>> for String`,
1777 `Into<Box<[T]>> for Vec<T>`,
1778 `Into<Box<CStr>> for CString`,
1779 `Into<Box<OsStr>> for OsString`,
1780 `Into<Box<Path>> for PathBuf`,
1781 `Default for Box<str>`,
1782 `Default for Box<CStr>`,
1783 `Default for Box<OsStr>`,
1784 `From<&CStr> for Box<CStr>`,
1785 `From<&OsStr> for Box<OsStr>`,
1786 `From<&Path> for Box<Path>`
1787 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
1788 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
1789 * [Slightly optimize `slice::sort`][39538]
1790 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
1791 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
1792 `Box<str>` implements `From<&str>`][39438]
1793 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
1794 `From<(I, u16)> where I: Into<IpAddr>`][39372]
1795 * [`format!` estimates the needed capacity before writing a string][39356]
1796 * [Support unprivileged symlink creation in Windows][38921]
1797 * [`PathBuf` implements `Default`][38764]
1798 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
1799 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
1800 and poor hash functions.
1805 * [Add `cargo check --all`][cargo/3731]
1806 * [Add an option to ignore SSL revocation checking][cargo/3699]
1807 * [Add `cargo run --package`][cargo/3691]
1808 * [Add `required_features`][cargo/3667]
1809 * [Assume `build.rs` is a build script][cargo/3664]
1810 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
1815 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
1817 * [The "Unstable Book" documents nightly-only features][ubook]
1818 * [Improve the style of the sidebar in rustdoc output][40265]
1819 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
1820 * [Fix MSP430 breakage due to `i128`][40257]
1821 * [Preliminary Solaris/SPARCv9 support][39903]
1822 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
1823 run without installing the MSVC runtime.
1824 * [`rustdoc --test` includes file names in test names][39788]
1825 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
1826 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
1827 * [Initial support for `aarch64-unknown-freebsd`][39491]
1828 * [Initial support for `i686-unknown-netbsd`][39426]
1829 * [This release no longer includes the old makefile build system][39431]. Rust
1830 is built with a custom build system, written in Rust, and with Cargo.
1831 * [Add Debug implementations for libcollection structs][39002]
1832 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
1833 * [`--test-threads=0` produces an error][38945]
1834 * [`rustup` installs documentation by default][40526]
1835 * [The Rust source includes NatVis visualizations][39843]. These can be used by
1836 WinDbg and Visual Studio to improve the debugging experience.
1841 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
1842 workaround, either use MSVC 2015 or run vcvars.bat.
1843 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1844 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
1845 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
1847 * [`format!` and `Display::to_string` panic if an underlying formatting
1848 implementation returns an error][40117]. Previously the error was silently
1849 ignored. It is incorrect for `write_fmt` to return an error when writing
1851 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
1852 crates were marked stable and could be accessed from the stable toolchain.
1853 * [Rust git source no longer includes vendored crates][39728]. Those that need
1854 to build with vendored crates should build from release tarballs.
1855 * [Fix inert attributes from `proc_macro_derives`][39572]
1856 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
1857 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
1859 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
1860 existing code generally ignores the type of dead-code unless a type-hint is
1861 provided; this can cause surprising inference interactions particularly around
1862 defaulting. The new code uniformly ignores the result type of dead-code.
1863 * [Tuple-struct constructors with private fields are no longer visible][38932]
1864 * [Lifetime parameters that do not appear in the arguments are now considered
1865 early-bound][38897], resolving a soundness bug (#[32330]). The
1866 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
1868 * [rustdoc: fix doctests with non-feature crate attributes][38161]
1869 * [Make transmuting from fn item types to pointer-sized types a hard
1872 [27787]: https://github.com/rust-lang/rust/issues/27787
1873 [32330]: https://github.com/rust-lang/rust/issues/32330
1874 [34198]: https://github.com/rust-lang/rust/pull/34198
1875 [38161]: https://github.com/rust-lang/rust/pull/38161
1876 [38368]: https://github.com/rust-lang/rust/pull/38368
1877 [38584]: https://github.com/rust-lang/rust/issues/38584
1878 [38661]: https://github.com/rust-lang/rust/pull/38661
1879 [38764]: https://github.com/rust-lang/rust/pull/38764
1880 [38864]: https://github.com/rust-lang/rust/issues/38864
1881 [38897]: https://github.com/rust-lang/rust/pull/38897
1882 [38921]: https://github.com/rust-lang/rust/pull/38921
1883 [38932]: https://github.com/rust-lang/rust/pull/38932
1884 [38945]: https://github.com/rust-lang/rust/pull/38945
1885 [38981]: https://github.com/rust-lang/rust/pull/38981
1886 [39002]: https://github.com/rust-lang/rust/pull/39002
1887 [39116]: https://github.com/rust-lang/rust/pull/39116
1888 [39193]: https://github.com/rust-lang/rust/pull/39193
1889 [39265]: https://github.com/rust-lang/rust/pull/39265
1890 [39356]: https://github.com/rust-lang/rust/pull/39356
1891 [39372]: https://github.com/rust-lang/rust/pull/39372
1892 [39426]: https://github.com/rust-lang/rust/pull/39426
1893 [39431]: https://github.com/rust-lang/rust/pull/39431
1894 [39438]: https://github.com/rust-lang/rust/pull/39438
1895 [39440]: https://github.com/rust-lang/rust/pull/39440
1896 [39485]: https://github.com/rust-lang/rust/pull/39485
1897 [39491]: https://github.com/rust-lang/rust/pull/39491
1898 [39518]: https://github.com/rust-lang/rust/pull/39518
1899 [39538]: https://github.com/rust-lang/rust/pull/39538
1900 [39572]: https://github.com/rust-lang/rust/pull/39572
1901 [39633]: https://github.com/rust-lang/rust/pull/39633
1902 [39642]: https://github.com/rust-lang/rust/pull/39642
1903 [39728]: https://github.com/rust-lang/rust/pull/39728
1904 [39761]: https://github.com/rust-lang/rust/pull/39761
1905 [39788]: https://github.com/rust-lang/rust/pull/39788
1906 [39793]: https://github.com/rust-lang/rust/pull/39793
1907 [39837]: https://github.com/rust-lang/rust/pull/39837
1908 [39843]: https://github.com/rust-lang/rust/pull/39843
1909 [39851]: https://github.com/rust-lang/rust/pull/39851
1910 [39903]: https://github.com/rust-lang/rust/pull/39903
1911 [39939]: https://github.com/rust-lang/rust/pull/39939
1912 [39953]: https://github.com/rust-lang/rust/pull/39953
1913 [39960]: https://github.com/rust-lang/rust/pull/39960
1914 [39990]: https://github.com/rust-lang/rust/pull/39990
1915 [39995]: https://github.com/rust-lang/rust/pull/39995
1916 [40008]: https://github.com/rust-lang/rust/pull/40008
1917 [40009]: https://github.com/rust-lang/rust/pull/40009
1918 [40027]: https://github.com/rust-lang/rust/pull/40027
1919 [40028]: https://github.com/rust-lang/rust/pull/40028
1920 [40037]: https://github.com/rust-lang/rust/pull/40037
1921 [40117]: https://github.com/rust-lang/rust/pull/40117
1922 [40166]: https://github.com/rust-lang/rust/pull/40166
1923 [40245]: https://github.com/rust-lang/rust/pull/40245
1924 [40257]: https://github.com/rust-lang/rust/pull/40257
1925 [40261]: https://github.com/rust-lang/rust/pull/40261
1926 [40265]: https://github.com/rust-lang/rust/pull/40265
1927 [40319]: https://github.com/rust-lang/rust/pull/40319
1928 [40336]: https://github.com/rust-lang/rust/pull/40336
1929 [40526]: https://github.com/rust-lang/rust/pull/40526
1930 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1931 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
1932 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
1933 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
1934 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
1935 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
1936 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
1937 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
1938 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
1939 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
1940 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
1941 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
1942 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
1943 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
1944 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
1945 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
1946 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
1947 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
1948 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
1949 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
1950 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
1951 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
1952 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
1953 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
1954 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
1955 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
1956 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
1957 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
1958 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
1959 [mdbook]: https://crates.io/crates/mdbook
1960 [ubook]: https://doc.rust-lang.org/unstable-book/
1963 Version 1.16.0 (2017-03-16)
1964 ===========================
1969 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1970 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1971 match patterns][38069]
1972 * [Clean up semantics of `self` in an import list][38313]
1973 * [`Self` may appear in `impl` headers][38920]
1974 * [`Self` may appear in struct expressions][39282]
1979 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
1980 a `.rmeta` file containing only crate metadata][38571]. This can be
1981 used by tools like the Rust Language Service to perform
1982 metadata-only builds.
1983 * [Levenshtein based typo suggestions now work in most places, while
1984 previously they worked only for fields and sometimes for local
1985 variables][38927]. Together with the overhaul of "no
1986 resolution"/"unexpected resolution" errors (#[38154]) they result in
1987 large and systematic improvement in resolution diagnostics.
1988 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
1990 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
1991 * [`rustc` no longer attempts to provide "consider using an explicit
1992 lifetime" suggestions][37057]. They were inaccurate.
1997 * [`VecDeque::truncate`]
1998 * [`VecDeque::resize`]
1999 * [`String::insert_str`]
2000 * [`Duration::checked_add`]
2001 * [`Duration::checked_sub`]
2002 * [`Duration::checked_div`]
2003 * [`Duration::checked_mul`]
2006 * [`SocketAddr::is_ipv4`]
2007 * [`SocketAddr::is_ipv6`]
2008 * [`IpAddr::is_ipv4`]
2009 * [`IpAddr::is_ipv6`]
2011 * [`Vec::dedup_by_key`]
2012 * [`Result::unwrap_or_default`]
2013 * [`<*const T>::wrapping_offset`]
2014 * [`<*mut T>::wrapping_offset`]
2015 * `CommandExt::creation_flags`
2016 * [`File::set_permissions`]
2017 * [`String::split_off`]
2022 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
2023 their argument by `Borrow` parameter][37761]
2024 * [All public types in std implement `Debug`][38006]
2025 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
2026 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
2027 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
2029 * [std: Fix partial writes in `LineWriter`][38062]
2030 * [std: Clamp max read/write sizes on Unix][38062]
2031 * [Use more specific panic message for `&str` slicing errors][38066]
2032 * [`TcpListener::set_only_v6` is deprecated][38304]. This
2033 functionality cannot be achieved in std currently.
2034 * [`writeln!`, like `println!`, now accepts a form with no string
2035 or formatting arguments, to just print a newline][38469]
2036 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
2037 * [Reduce the size of static data in `std_unicode::tables`][38781]
2038 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
2039 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
2041 * [`Duration` implements `Sum`][38712]
2042 * [`String` implements `ToSocketAddrs`][39048]
2047 * [The `cargo check` command does a type check of a project without
2048 building it][cargo/3296]
2049 * [crates.io will display CI badges from Travis and AppVeyor, if
2050 specified in Cargo.toml][cargo/3546]
2051 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
2052 * [Compilation profiles accept integer values for `debug`, in addition
2053 to `true` and `false`. These are passed to `rustc` as the value to
2054 `-C debuginfo`][cargo/3534]
2055 * [Implement `cargo --version --verbose`][cargo/3604]
2056 * [All builds now output 'dep-info' build dependencies compatible with
2057 make and ninja][cargo/3557]
2058 * [Build all workspace members with `build --all`][cargo/3511]
2059 * [Document all workspace members with `doc --all`][cargo/3515]
2060 * [Path deps outside workspace are not members][cargo/3443]
2065 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
2066 the path to the Rust implementation][38589]
2067 * [The `armv7-linux-androideabi` target no longer enables NEON
2068 extensions, per Google's ABI guide][38413]
2069 * [The stock standard library can be compiled for Redox OS][38401]
2070 * [Rust has initial SPARC support][38726]. Tier 3. No builds
2072 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
2074 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
2079 * [Uninhabitable enums (those without any variants) no longer permit wildcard
2080 match patterns][38069]
2081 * In this release, references to uninhabited types can not be
2082 pattern-matched. This was accidentally allowed in 1.15.
2083 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
2084 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
2086 * [Clean up semantics of `self` in an import list][38313]
2087 * Reimplemented lifetime elision. This change was almost entirely compatible
2088 with existing code, but it did close a number of small bugs and loopholes,
2089 as well as being more accepting in some other [cases][41105].
2091 [37057]: https://github.com/rust-lang/rust/pull/37057
2092 [37761]: https://github.com/rust-lang/rust/pull/37761
2093 [38006]: https://github.com/rust-lang/rust/pull/38006
2094 [38051]: https://github.com/rust-lang/rust/pull/38051
2095 [38062]: https://github.com/rust-lang/rust/pull/38062
2096 [38062]: https://github.com/rust-lang/rust/pull/38622
2097 [38066]: https://github.com/rust-lang/rust/pull/38066
2098 [38069]: https://github.com/rust-lang/rust/pull/38069
2099 [38131]: https://github.com/rust-lang/rust/pull/38131
2100 [38154]: https://github.com/rust-lang/rust/pull/38154
2101 [38274]: https://github.com/rust-lang/rust/pull/38274
2102 [38304]: https://github.com/rust-lang/rust/pull/38304
2103 [38313]: https://github.com/rust-lang/rust/pull/38313
2104 [38314]: https://github.com/rust-lang/rust/pull/38314
2105 [38327]: https://github.com/rust-lang/rust/pull/38327
2106 [38401]: https://github.com/rust-lang/rust/pull/38401
2107 [38413]: https://github.com/rust-lang/rust/pull/38413
2108 [38469]: https://github.com/rust-lang/rust/pull/38469
2109 [38559]: https://github.com/rust-lang/rust/pull/38559
2110 [38571]: https://github.com/rust-lang/rust/pull/38571
2111 [38580]: https://github.com/rust-lang/rust/pull/38580
2112 [38589]: https://github.com/rust-lang/rust/pull/38589
2113 [38670]: https://github.com/rust-lang/rust/pull/38670
2114 [38712]: https://github.com/rust-lang/rust/pull/38712
2115 [38726]: https://github.com/rust-lang/rust/pull/38726
2116 [38781]: https://github.com/rust-lang/rust/pull/38781
2117 [38798]: https://github.com/rust-lang/rust/pull/38798
2118 [38909]: https://github.com/rust-lang/rust/pull/38909
2119 [38920]: https://github.com/rust-lang/rust/pull/38920
2120 [38927]: https://github.com/rust-lang/rust/pull/38927
2121 [39048]: https://github.com/rust-lang/rust/pull/39048
2122 [39282]: https://github.com/rust-lang/rust/pull/39282
2123 [39379]: https://github.com/rust-lang/rust/pull/39379
2124 [41105]: https://github.com/rust-lang/rust/issues/41105
2125 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2126 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2127 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
2128 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
2129 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
2130 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
2131 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
2132 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
2133 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
2134 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
2135 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
2136 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
2137 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
2138 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
2139 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
2140 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
2141 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
2142 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
2143 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
2144 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
2145 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
2146 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
2147 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
2148 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
2149 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
2150 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
2151 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
2152 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
2153 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
2154 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
2157 Version 1.15.1 (2017-02-09)
2158 ===========================
2160 * [Fix IntoIter::as_mut_slice's signature][39466]
2161 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
2163 [39466]: https://github.com/rust-lang/rust/pull/39466
2164 [39523]: https://github.com/rust-lang/rust/pull/39523
2167 Version 1.15.0 (2017-02-02)
2168 ===========================
2173 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
2174 stable. This allows popular code-generating crates like Serde and Diesel to
2175 work ergonomically. [RFC 1681].
2176 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
2177 with curly braces][36868]. Part of [RFC 1506].
2178 * [A number of minor changes to name resolution have been activated][37127].
2179 They add up to more consistent semantics, allowing for future evolution of
2180 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2181 details of what is different. The breaking changes here have been transitioned
2182 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2183 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
2185 * [`?Sized` can be used in `where` clauses][37791]
2186 * [There is now a limit on the size of monomorphized types and it can be
2187 modified with the `#![type_size_limit]` crate attribute, similarly to
2188 the `#![recursion_limit]` attribute][37789]
2193 * [On Windows, the compiler will apply dllimport attributes when linking to
2194 extern functions][37973]. Additional attributes and flags can control which
2195 library kind is linked and its name. [RFC 1717].
2196 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2197 * [The `--test` flag works with procedural macro crates][38107]
2198 * [Fix `extern "aapcs" fn` ABI][37814]
2199 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
2200 * [The `format!` expander recognizes incorrect `printf` and shell-style
2201 formatting directives and suggests the correct format][37613].
2202 * [Only report one error for all unused imports in an import list][37456]
2204 Compiler Performance
2205 --------------------
2207 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
2208 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
2209 * [Don't clone in `UnificationTable::probe`][37848]
2210 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
2211 * [Use small vectors in type walker][37760]
2212 * [Macro expansion performance was improved][37701]
2213 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
2214 * [Replace FNV with a faster hash function][37229]
2219 * [`std::iter::Iterator::min_by`]
2220 * [`std::iter::Iterator::max_by`]
2221 * [`std::os::*::fs::FileExt`]
2222 * [`std::sync::atomic::Atomic*::get_mut`]
2223 * [`std::sync::atomic::Atomic*::into_inner`]
2224 * [`std::vec::IntoIter::as_slice`]
2225 * [`std::vec::IntoIter::as_mut_slice`]
2226 * [`std::sync::mpsc::Receiver::try_iter`]
2227 * [`std::os::unix::process::CommandExt::before_exec`]
2228 * [`std::rc::Rc::strong_count`]
2229 * [`std::rc::Rc::weak_count`]
2230 * [`std::sync::Arc::strong_count`]
2231 * [`std::sync::Arc::weak_count`]
2232 * [`std::char::encode_utf8`]
2233 * [`std::char::encode_utf16`]
2234 * [`std::cell::Ref::clone`]
2235 * [`std::io::Take::into_inner`]
2240 * [The standard sorting algorithm has been rewritten for dramatic performance
2241 improvements][38192]. It is a hybrid merge sort, drawing influences from
2242 Timsort. Previously it was a naive merge sort.
2243 * [`Iterator::nth` no longer has a `Sized` bound][38134]
2244 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
2246 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
2247 and `char_indices().last()`][37882]
2248 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
2249 * [Chinese characters display correctly in `fmt::Debug`][37855]
2250 * [Derive `Default` for `Duration`][37699]
2251 * [Support creation of anonymous pipes on WinXP/2k][37677]
2252 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
2253 * [Don't pass overlapped handles to processes][38835]
2258 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2259 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2260 should instead check the variable at runtime with `std::env`. That the value
2261 was set at build time was a bug, and incorrect when cross-compiling. This
2262 change is known to cause breakage.
2263 * [Add `--all` flag to `cargo test`][cargo/3221]
2264 * [Compile statically against the MSVC CRT][cargo/3363]
2265 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
2266 * [Link OpenSSL statically on OSX][cargo/3311]
2267 * [Apply new fingerprinting to build dir outputs][cargo/3310]
2268 * [Test for bad path overrides with summaries][cargo/3336]
2269 * [Require `cargo install --vers` to take a semver version][cargo/3338]
2270 * [Fix retrying crate downloads for network errors][cargo/3348]
2271 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
2272 * [Emit more info on --message-format=json][cargo/3319]
2273 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
2274 * [Don't ignore errors in workspace manifest][cargo/3409]
2275 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
2280 * [Test runners (binaries built with `--test`) now support a `--list` argument
2281 that lists the tests it contains][38185]
2282 * [Test runners now support a `--exact` argument that makes the test filter
2283 match exactly, instead of matching only a substring of the test name][38181]
2284 * [rustdoc supports a `--playground-url` flag][37763]
2285 * [rustdoc provides more details about `#[should_panic]` errors][37749]
2290 * [The Rust build system is now written in Rust][37817]. The Makefiles may
2291 continue to be used in this release by passing `--disable-rustbuild` to the
2292 configure script, but they will be deleted soon. Note that the new build
2293 system uses a different on-disk layout that will likely affect any scripts
2295 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
2297 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
2298 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
2304 * [A number of minor changes to name resolution have been activated][37127].
2305 They add up to more consistent semantics, allowing for future evolution of
2306 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2307 details of what is different. The breaking changes here have been transitioned
2308 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2309 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2310 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2311 should instead check the variable at runtime with `std::env`. That the value
2312 was set at build time was a bug, and incorrect when cross-compiling. This
2313 change is known to cause breakage.
2314 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
2315 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
2316 1.10 and is now an error by default. It will become a hard error in the near
2318 * [The semantics relating modules to file system directories are changing in
2319 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
2320 lint, which is a warning in this release, and will become a hard error in the
2322 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2323 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
2324 the underlying iterator][37834]
2326 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
2327 [33685]: https://github.com/rust-lang/rust/issues/33685
2328 [36868]: https://github.com/rust-lang/rust/pull/36868
2329 [37127]: https://github.com/rust-lang/rust/pull/37127
2330 [37229]: https://github.com/rust-lang/rust/pull/37229
2331 [37456]: https://github.com/rust-lang/rust/pull/37456
2332 [37527]: https://github.com/rust-lang/rust/pull/37527
2333 [37602]: https://github.com/rust-lang/rust/pull/37602
2334 [37613]: https://github.com/rust-lang/rust/pull/37613
2335 [37615]: https://github.com/rust-lang/rust/pull/37615
2336 [37636]: https://github.com/rust-lang/rust/pull/37636
2337 [37627]: https://github.com/rust-lang/rust/pull/37627
2338 [37642]: https://github.com/rust-lang/rust/pull/37642
2339 [37677]: https://github.com/rust-lang/rust/pull/37677
2340 [37699]: https://github.com/rust-lang/rust/pull/37699
2341 [37701]: https://github.com/rust-lang/rust/pull/37701
2342 [37705]: https://github.com/rust-lang/rust/pull/37705
2343 [37749]: https://github.com/rust-lang/rust/pull/37749
2344 [37760]: https://github.com/rust-lang/rust/pull/37760
2345 [37763]: https://github.com/rust-lang/rust/pull/37763
2346 [37764]: https://github.com/rust-lang/rust/pull/37764
2347 [37789]: https://github.com/rust-lang/rust/pull/37789
2348 [37791]: https://github.com/rust-lang/rust/pull/37791
2349 [37814]: https://github.com/rust-lang/rust/pull/37814
2350 [37817]: https://github.com/rust-lang/rust/pull/37817
2351 [37834]: https://github.com/rust-lang/rust/pull/37834
2352 [37848]: https://github.com/rust-lang/rust/pull/37848
2353 [37855]: https://github.com/rust-lang/rust/pull/37855
2354 [37882]: https://github.com/rust-lang/rust/pull/37882
2355 [37888]: https://github.com/rust-lang/rust/pull/37888
2356 [37973]: https://github.com/rust-lang/rust/pull/37973
2357 [37979]: https://github.com/rust-lang/rust/pull/37979
2358 [38086]: https://github.com/rust-lang/rust/pull/38086
2359 [38107]: https://github.com/rust-lang/rust/pull/38107
2360 [38117]: https://github.com/rust-lang/rust/pull/38117
2361 [38134]: https://github.com/rust-lang/rust/pull/38134
2362 [38146]: https://github.com/rust-lang/rust/pull/38146
2363 [38181]: https://github.com/rust-lang/rust/pull/38181
2364 [38182]: https://github.com/rust-lang/rust/pull/38182
2365 [38185]: https://github.com/rust-lang/rust/pull/38185
2366 [38192]: https://github.com/rust-lang/rust/pull/38192
2367 [38279]: https://github.com/rust-lang/rust/pull/38279
2368 [38835]: https://github.com/rust-lang/rust/pull/38835
2369 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2370 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2371 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
2372 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
2373 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
2374 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
2375 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
2376 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
2377 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
2378 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
2379 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
2380 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
2381 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
2382 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
2383 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
2384 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
2385 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
2386 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
2387 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
2388 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
2389 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
2390 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
2391 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
2392 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
2393 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
2394 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
2395 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
2396 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
2397 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
2398 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
2399 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
2400 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
2401 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
2402 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
2403 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
2404 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
2405 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
2406 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
2409 Version 1.14.0 (2016-12-22)
2410 ===========================
2415 * [`..` matches multiple tuple fields in enum variants, structs
2416 and tuples][36843]. [RFC 1492].
2417 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
2418 * [`use *` and `use ::*` both glob-import from the crate root][37367]
2419 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
2420 dereferencing][36822]
2425 * [Mark enums with non-zero discriminant as non-zero][37224]
2426 * [Lower-case `static mut` names are linted like other
2427 statics and consts][37162]
2428 * [Fix ICE on some macros in const integer positions
2429 (e.g. `[u8; m!()]`)][36819]
2430 * [Improve error message and snippet for "did you mean `x`"][36798]
2431 * [Add a panic-strategy field to the target specification][36794]
2432 * [Include LLVM version in `--version --verbose`][37200]
2434 Compile-time Optimizations
2435 --------------------------
2437 * [Improve macro expansion performance][37569]
2438 * [Shrink `Expr_::ExprInlineAsm`][37445]
2439 * [Replace all uses of SHA-256 with BLAKE2b][37439]
2440 * [Reduce the number of bytes hashed by `IchHasher`][37427]
2441 * [Avoid more allocations when compiling html5ever][37373]
2442 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
2443 * [Avoid some allocations in the macro parser][37318]
2444 * [Use a faster deflate setting][37298]
2445 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
2446 during interning of slices][37270]
2447 * [Optimize `write_metadata`][37267]
2448 * [Don't process obligation forest cycles when stalled][37231]
2449 * [Avoid many `CrateConfig` clones][37161]
2450 * [Optimize `Substs::super_fold_with`][37108]
2451 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
2452 * [Speed up `plug_leaks`][36917]
2457 * [`println!()`, with no arguments, prints newline][36825].
2458 Previously, an empty string was required to achieve the same.
2459 * [`Wrapping` impls standard binary and unary operators, as well as
2460 the `Sum` and `Product` iterators][37356]
2461 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
2463 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
2464 `VecDeque` iterators][37315]
2465 * [Improve `SipHasher` performance on small values][37312]
2466 * [Add Iterator trait TrustedLen to enable better FromIterator /
2468 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
2469 * [`ReadDir` implements `Debug`][37221]
2470 * [Implement `RefUnwindSafe` for atomic types][37178]
2471 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
2472 * [Avoid allocations in `Decoder::read_str`][37064]
2473 * [`io::Error` implements `From<io::ErrorKind>`][37037]
2474 * [Impl `Debug` for raw pointers to unsized data][36880]
2475 * [Don't reuse `HashMap` random seeds][37470]
2476 * [The internal memory layout of `HashMap` is more cache-friendly, for
2477 significant improvements in some operations][36692]
2478 * [`HashMap` uses less memory on 32-bit architectures][36595]
2479 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
2484 * [Expose rustc cfg values to build scripts][cargo/3243]
2485 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
2486 * [Fix passing --features when testing multiple packages][cargo/3280]
2487 * [Use a single profile set per workspace][cargo/3249]
2488 * [Load `replace` sections from lock files][cargo/3220]
2489 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
2494 * [rustup is the recommended Rust installation method][1.14rustup]
2495 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
2496 S390x. These are [tier 2] platforms and may have major defects. Follow the
2497 instructions on the website to install, or add the targets to an existing
2498 installation with `rustup target add`. The new target triples are:
2499 - `mips-unknown-linux-gnu`
2500 - `mipsel-unknown-linux-gnu`
2501 - `mips64-unknown-linux-gnuabi64`
2502 - `mips64el-unknown-linux-gnuabi64 `
2503 - `powerpc-unknown-linux-gnu`
2504 - `powerpc64-unknown-linux-gnu`
2505 - `powerpc64le-unknown-linux-gnu`
2506 - `s390x-unknown-linux-gnu `
2507 * This release includes target (std) builds for ARM Linux running MUSL
2508 libc. These are [tier 2] platforms and may have major defects. Add the
2509 following triples to an existing rustup installation with `rustup target add`:
2510 - `arm-unknown-linux-musleabi`
2511 - `arm-unknown-linux-musleabihf`
2512 - `armv7-unknown-linux-musleabihf`
2513 * This release includes [experimental support for WebAssembly][1.14wasm], via
2514 the `wasm32-unknown-emscripten` target. This target is known to have major
2515 defects. Please test, report, and fix.
2516 * rustup no longer installs documentation by default. Run `rustup
2517 component add rust-docs` to install.
2518 * [Fix line stepping in debugger][37310]
2519 * [Enable line number debuginfo in releases][37280]
2524 * [Disable jemalloc on aarch64/powerpc/mips][37392]
2525 * [Add support for Fuchsia OS][37313]
2526 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
2531 * [A number of forward-compatibility lints used by the compiler
2532 to gradually introduce language changes have been converted
2533 to deny by default][36894]:
2534 - ["use of inaccessible extern crate erroneously allowed"][36886]
2535 - ["type parameter default erroneously allowed in invalid location"][36887]
2536 - ["detects super or self keywords at the beginning of global path"][36888]
2537 - ["two overlapping inherent impls define an item with the same name
2538 were erroneously allowed"][36889]
2539 - ["floating-point constants cannot be used in patterns"][36890]
2540 - ["constants of struct or enum type can only be used in a pattern if
2541 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
2542 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
2543 * [Prohibit patterns in trait methods without bodies][37378]
2544 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
2545 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
2546 * [The `$crate` macro variable is accepted in fewer locations][37213]
2547 * [Impls specifying extra region requirements beyond the trait
2548 they implement are rejected][37167]
2549 * [Enums may not be unsized][37111]. Unsized enums are intended to
2550 work but never have. For now they are forbidden.
2551 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
2553 [tier 2]: https://forge.rust-lang.org/platform-support.html
2554 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
2555 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
2556 [36430]: https://github.com/rust-lang/rust/pull/36430
2557 [36595]: https://github.com/rust-lang/rust/pull/36595
2558 [36595]: https://github.com/rust-lang/rust/pull/36595
2559 [36692]: https://github.com/rust-lang/rust/pull/36692
2560 [36767]: https://github.com/rust-lang/rust/pull/36767
2561 [36794]: https://github.com/rust-lang/rust/pull/36794
2562 [36798]: https://github.com/rust-lang/rust/pull/36798
2563 [36819]: https://github.com/rust-lang/rust/pull/36819
2564 [36822]: https://github.com/rust-lang/rust/pull/36822
2565 [36825]: https://github.com/rust-lang/rust/pull/36825
2566 [36843]: https://github.com/rust-lang/rust/pull/36843
2567 [36880]: https://github.com/rust-lang/rust/pull/36880
2568 [36886]: https://github.com/rust-lang/rust/issues/36886
2569 [36887]: https://github.com/rust-lang/rust/issues/36887
2570 [36888]: https://github.com/rust-lang/rust/issues/36888
2571 [36889]: https://github.com/rust-lang/rust/issues/36889
2572 [36890]: https://github.com/rust-lang/rust/issues/36890
2573 [36891]: https://github.com/rust-lang/rust/issues/36891
2574 [36892]: https://github.com/rust-lang/rust/issues/36892
2575 [36894]: https://github.com/rust-lang/rust/pull/36894
2576 [36917]: https://github.com/rust-lang/rust/pull/36917
2577 [36993]: https://github.com/rust-lang/rust/pull/36993
2578 [37037]: https://github.com/rust-lang/rust/pull/37037
2579 [37064]: https://github.com/rust-lang/rust/pull/37064
2580 [37094]: https://github.com/rust-lang/rust/pull/37094
2581 [37108]: https://github.com/rust-lang/rust/pull/37108
2582 [37111]: https://github.com/rust-lang/rust/pull/37111
2583 [37161]: https://github.com/rust-lang/rust/pull/37161
2584 [37162]: https://github.com/rust-lang/rust/pull/37162
2585 [37167]: https://github.com/rust-lang/rust/pull/37167
2586 [37178]: https://github.com/rust-lang/rust/pull/37178
2587 [37200]: https://github.com/rust-lang/rust/pull/37200
2588 [37213]: https://github.com/rust-lang/rust/pull/37213
2589 [37221]: https://github.com/rust-lang/rust/pull/37221
2590 [37224]: https://github.com/rust-lang/rust/pull/37224
2591 [37230]: https://github.com/rust-lang/rust/pull/37230
2592 [37231]: https://github.com/rust-lang/rust/pull/37231
2593 [37247]: https://github.com/rust-lang/rust/pull/37247
2594 [37267]: https://github.com/rust-lang/rust/pull/37267
2595 [37270]: https://github.com/rust-lang/rust/pull/37270
2596 [37273]: https://github.com/rust-lang/rust/pull/37273
2597 [37280]: https://github.com/rust-lang/rust/pull/37280
2598 [37298]: https://github.com/rust-lang/rust/pull/37298
2599 [37306]: https://github.com/rust-lang/rust/pull/37306
2600 [37310]: https://github.com/rust-lang/rust/pull/37310
2601 [37312]: https://github.com/rust-lang/rust/pull/37312
2602 [37313]: https://github.com/rust-lang/rust/pull/37313
2603 [37315]: https://github.com/rust-lang/rust/pull/37315
2604 [37318]: https://github.com/rust-lang/rust/pull/37318
2605 [37322]: https://github.com/rust-lang/rust/pull/37322
2606 [37326]: https://github.com/rust-lang/rust/pull/37326
2607 [37351]: https://github.com/rust-lang/rust/pull/37351
2608 [37356]: https://github.com/rust-lang/rust/pull/37356
2609 [37367]: https://github.com/rust-lang/rust/pull/37367
2610 [37373]: https://github.com/rust-lang/rust/pull/37373
2611 [37378]: https://github.com/rust-lang/rust/pull/37378
2612 [37389]: https://github.com/rust-lang/rust/pull/37389
2613 [37392]: https://github.com/rust-lang/rust/pull/37392
2614 [37427]: https://github.com/rust-lang/rust/pull/37427
2615 [37439]: https://github.com/rust-lang/rust/pull/37439
2616 [37445]: https://github.com/rust-lang/rust/pull/37445
2617 [37470]: https://github.com/rust-lang/rust/pull/37470
2618 [37569]: https://github.com/rust-lang/rust/pull/37569
2619 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2620 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
2621 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
2622 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
2623 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
2624 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
2625 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
2628 Version 1.13.0 (2016-11-10)
2629 ===========================
2634 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
2635 errors, like the `try!` macro, described in [RFC 0243].
2636 * [Stabilize macros in type position][36014]. Described in [RFC 873].
2637 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
2638 * [Fix `#[derive]` for empty tuple structs/variants][35728]
2639 * [Fix lifetime rules for 'if' conditions][36029]
2640 * [Avoid loading and parsing unconfigured non-inline modules][36482]
2645 * [Add the `-C link-arg` argument][36574]
2646 * [Remove the old AST-based backend from rustc_trans][35764]
2647 * [Don't enable NEON by default on armv7 Linux][35814]
2648 * [Fix debug line number info for macro expansions][35238]
2649 * [Do not emit "class method" debuginfo for types that are not
2650 DICompositeType][36008]
2651 * [Warn about multiple conflicting #[repr] hints][34623]
2652 * [When sizing DST, don't double-count nested struct prefixes][36351]
2653 * [Default RUST_MIN_STACK to 16MiB for now][36505]
2654 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
2655 * [Reject macros with empty repetitions to avoid infinite loop][36721]
2656 * [Expand macros without recursing to avoid stack overflows][36214]
2661 * [Replace macro backtraces with labeled local uses][35702]
2662 * [Improve error message for misplaced doc comments][33922]
2663 * [Buffer unix and lock windows to prevent message interleaving][35975]
2664 * [Update lifetime errors to specifically note temporaries][36171]
2665 * [Special case a few colors for Windows][36178]
2666 * [Suggest `use self` when such an import resolves][36289]
2667 * [Be more specific when type parameter shadows primitive type][36338]
2668 * Many minor improvements
2670 Compile-time Optimizations
2671 --------------------------
2673 * [Compute and cache HIR hashes at beginning][35854]
2674 * [Don't hash types in loan paths][36004]
2675 * [Cache projections in trans][35761]
2676 * [Optimize the parser's last token handling][36527]
2677 * [Only instantiate #[inline] functions in codegen units referencing
2678 them][36524]. This leads to big improvements in cases where crates export
2679 define many inline functions without using them directly.
2680 * [Lazily allocate TypedArena's first chunk][36592]
2681 * [Don't allocate during default HashSet creation][36734]
2688 * [`overflowing_abs`]
2689 * [`RefCell::try_borrow`]
2690 * [`RefCell::try_borrow_mut`]
2695 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
2696 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
2698 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
2699 * [Implement `Debug` for `std::vec::IntoIter`][35707]
2700 * [`CString`: avoid excessive growth just to 0-terminate][35871]
2701 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
2702 * [Use arc4rand on FreeBSD][35884]
2703 * [memrchr: Correct aligned offset computation][35969]
2704 * [Improve Demangling of Rust Symbols][36059]
2705 * [Use monotonic time in condition variables][35048]
2706 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
2707 * [Implement conversion traits for `char`][35755]
2708 * [Fix illegal instruction caused by overflow in channel cloning][36104]
2709 * [Zero first byte of CString on drop][36264]
2710 * [Inherit overflow checks for sum and product][36372]
2711 * [Add missing Eq implementations][36423]
2712 * [Implement `Debug` for `DirEntry`][36631]
2713 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
2715 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2716 * [Implement more traits for `std::io::ErrorKind`][35911]
2717 * [Optimize BinaryHeap bounds checking][36072]
2718 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
2719 `extend_with_element`][36355]
2720 * [Fix overflow checking in unsigned pow()][34942]
2725 * This release includes security fixes to both curl and OpenSSL.
2726 * [Fix transitive doctests when panic=abort][cargo/3021]
2727 * [Add --all-features flag to cargo][cargo/3038]
2728 * [Reject path-based dependencies in `cargo package`][cargo/3060]
2729 * [Don't parse the home directory more than once][cargo/3078]
2730 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
2731 * [Update OpenSSL to 1.0.2j][cargo/3121]
2732 * [Add license and license_file to cargo metadata output][cargo/3110]
2733 * [Make crates-io registry URL optional in config; ignore all changes to
2734 source.crates-io][cargo/3089]
2735 * [Don't download dependencies from other platforms][cargo/3123]
2736 * [Build transitive dev-dependencies when needed][cargo/3125]
2737 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
2738 * [Avoid updating registry when adding existing deps][cargo/3144]
2739 * [Warn about path overrides that won't work][cargo/3136]
2740 * [Use workspaces during `cargo install`][cargo/3146]
2741 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
2742 * [Add --message-format flag][cargo/3000]
2743 * [Pass target environment for rustdoc][cargo/3205]
2744 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
2745 * [Update curl and curl-sys][cargo/3241]
2746 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
2751 * [rustdoc: Add the `--sysroot` argument][36586]
2752 * [rustdoc: Fix a couple of issues with the search results][35655]
2753 * [rustdoc: remove the `!` from macro URLs and titles][35234]
2754 * [gdb: Fix pretty-printing special-cased Rust types][35585]
2755 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
2760 * [Remove unmaintained style guide][35124]
2761 * [Add s390x support][36369]
2762 * [Initial work at Haiku OS support][36727]
2763 * [Add mips-uclibc targets][35734]
2764 * [Crate-ify compiler-rt into compiler-builtins][35021]
2765 * [Add rustc version info (git hash + date) to dist tarball][36213]
2766 * Many documentation improvements
2771 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2772 * [Deny (by default) transmuting from fn item types to pointer-sized
2773 types][34923]. Continuing the long transition to zero-sized fn items,
2775 * [Fix `#[derive]` for empty tuple structs/variants][35728].
2777 * [Issue deprecation warnings for safe accesses to extern statics][36173]
2778 * [Fix lifetime rules for 'if' conditions][36029].
2779 * [Inherit overflow checks for sum and product][36372].
2780 * [Forbid user-defined macros named "macro_rules"][36730].
2782 [33922]: https://github.com/rust-lang/rust/pull/33922
2783 [34623]: https://github.com/rust-lang/rust/pull/34623
2784 [34923]: https://github.com/rust-lang/rust/pull/34923
2785 [34942]: https://github.com/rust-lang/rust/pull/34942
2786 [34982]: https://github.com/rust-lang/rust/pull/34982
2787 [35021]: https://github.com/rust-lang/rust/pull/35021
2788 [35048]: https://github.com/rust-lang/rust/pull/35048
2789 [35074]: https://github.com/rust-lang/rust/pull/35074
2790 [35124]: https://github.com/rust-lang/rust/pull/35124
2791 [35234]: https://github.com/rust-lang/rust/pull/35234
2792 [35238]: https://github.com/rust-lang/rust/pull/35238
2793 [35354]: https://github.com/rust-lang/rust/pull/35354
2794 [35559]: https://github.com/rust-lang/rust/pull/35559
2795 [35585]: https://github.com/rust-lang/rust/pull/35585
2796 [35627]: https://github.com/rust-lang/rust/pull/35627
2797 [35655]: https://github.com/rust-lang/rust/pull/35655
2798 [35702]: https://github.com/rust-lang/rust/pull/35702
2799 [35707]: https://github.com/rust-lang/rust/pull/35707
2800 [35728]: https://github.com/rust-lang/rust/pull/35728
2801 [35734]: https://github.com/rust-lang/rust/pull/35734
2802 [35755]: https://github.com/rust-lang/rust/pull/35755
2803 [35761]: https://github.com/rust-lang/rust/pull/35761
2804 [35764]: https://github.com/rust-lang/rust/pull/35764
2805 [35814]: https://github.com/rust-lang/rust/pull/35814
2806 [35854]: https://github.com/rust-lang/rust/pull/35854
2807 [35871]: https://github.com/rust-lang/rust/pull/35871
2808 [35884]: https://github.com/rust-lang/rust/pull/35884
2809 [35911]: https://github.com/rust-lang/rust/pull/35911
2810 [35969]: https://github.com/rust-lang/rust/pull/35969
2811 [35975]: https://github.com/rust-lang/rust/pull/35975
2812 [36004]: https://github.com/rust-lang/rust/pull/36004
2813 [36008]: https://github.com/rust-lang/rust/pull/36008
2814 [36014]: https://github.com/rust-lang/rust/pull/36014
2815 [36029]: https://github.com/rust-lang/rust/pull/36029
2816 [36059]: https://github.com/rust-lang/rust/pull/36059
2817 [36072]: https://github.com/rust-lang/rust/pull/36072
2818 [36101]: https://github.com/rust-lang/rust/pull/36101
2819 [36104]: https://github.com/rust-lang/rust/pull/36104
2820 [36171]: https://github.com/rust-lang/rust/pull/36171
2821 [36173]: https://github.com/rust-lang/rust/pull/36173
2822 [36178]: https://github.com/rust-lang/rust/pull/36178
2823 [36213]: https://github.com/rust-lang/rust/pull/36213
2824 [36214]: https://github.com/rust-lang/rust/pull/36214
2825 [36264]: https://github.com/rust-lang/rust/pull/36264
2826 [36266]: https://github.com/rust-lang/rust/pull/36266
2827 [36289]: https://github.com/rust-lang/rust/pull/36289
2828 [36338]: https://github.com/rust-lang/rust/pull/36338
2829 [36351]: https://github.com/rust-lang/rust/pull/36351
2830 [36355]: https://github.com/rust-lang/rust/pull/36355
2831 [36369]: https://github.com/rust-lang/rust/pull/36369
2832 [36372]: https://github.com/rust-lang/rust/pull/36372
2833 [36423]: https://github.com/rust-lang/rust/pull/36423
2834 [36482]: https://github.com/rust-lang/rust/pull/36482
2835 [36505]: https://github.com/rust-lang/rust/pull/36505
2836 [36524]: https://github.com/rust-lang/rust/pull/36524
2837 [36527]: https://github.com/rust-lang/rust/pull/36527
2838 [36551]: https://github.com/rust-lang/rust/pull/36551
2839 [36574]: https://github.com/rust-lang/rust/pull/36574
2840 [36586]: https://github.com/rust-lang/rust/pull/36586
2841 [36592]: https://github.com/rust-lang/rust/pull/36592
2842 [36631]: https://github.com/rust-lang/rust/pull/36631
2843 [36639]: https://github.com/rust-lang/rust/pull/36639
2844 [36721]: https://github.com/rust-lang/rust/pull/36721
2845 [36727]: https://github.com/rust-lang/rust/pull/36727
2846 [36730]: https://github.com/rust-lang/rust/pull/36730
2847 [36734]: https://github.com/rust-lang/rust/pull/36734
2848 [36754]: https://github.com/rust-lang/rust/pull/36754
2849 [36995]: https://github.com/rust-lang/rust/pull/36995
2850 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
2851 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
2852 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2853 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
2854 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
2855 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
2856 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
2857 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
2858 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
2859 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
2860 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
2861 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
2862 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
2863 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
2864 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
2865 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
2866 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
2867 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
2868 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
2869 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
2870 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
2871 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
2872 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
2873 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
2874 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
2875 [rustup]: https://www.rustup.rs
2876 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
2877 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
2878 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
2879 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
2880 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
2881 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
2882 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
2885 Version 1.12.1 (2016-10-20)
2886 ===========================
2891 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
2892 * [Confusion with double negation and booleans][36856]
2893 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
2894 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
2895 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
2896 * [Corrupted memory after updated to 1.12][36936]
2897 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
2898 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
2899 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
2901 [36381]: https://github.com/rust-lang/rust/issues/36381
2902 [36856]: https://github.com/rust-lang/rust/issues/36856
2903 [36875]: https://github.com/rust-lang/rust/issues/36875
2904 [36924]: https://github.com/rust-lang/rust/issues/36924
2905 [36926]: https://github.com/rust-lang/rust/issues/36926
2906 [36936]: https://github.com/rust-lang/rust/issues/36936
2907 [37026]: https://github.com/rust-lang/rust/issues/37026
2908 [37112]: https://github.com/rust-lang/rust/issues/37112
2909 [37153]: https://github.com/rust-lang/rust/issues/37153
2912 Version 1.12.0 (2016-09-29)
2913 ===========================
2918 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2919 This translation pass is far simpler than the previous AST->LLVM pass, and
2920 creates opportunities to perform new optimizations directly on the MIR. It
2921 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2922 * [`rustc` presents a new, more readable error format, along with
2923 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2924 Most common editors supporting Rust have been updated to work with it. It was
2925 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2930 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2931 This translation pass is far simpler than the previous AST->LLVM pass, and
2932 creates opportunities to perform new optimizations directly on the MIR. It
2933 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2934 * [Print the Rust target name, not the LLVM target name, with
2935 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
2936 * [The computation of `TypeId` is correct in some cases where it was previously
2937 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
2938 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
2939 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
2940 `--print relocation-models`, and `--print code-models` print the available
2941 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
2942 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
2943 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
2944 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
2945 These targets produce statically-linked binaries. There are no binary release
2951 * [`rustc` presents a new, more readable error format, along with
2952 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2953 Most common editors supporting Rust have been updated to work with it. It was
2954 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2955 * [In error descriptions, references are now described in plain English,
2956 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
2957 * [In error type descriptions, unknown numeric types are named `{integer}` or
2958 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
2959 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
2964 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
2965 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
2966 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
2967 useful](https://github.com/rust-lang/rust/pull/34908)
2968 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
2969 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
2970 * [Semicolons are properly required as statement delimiters inside
2971 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
2972 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2977 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
2978 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
2979 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
2980 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
2981 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
2982 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
2983 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
2984 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
2985 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
2986 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
2987 Both on Unix and Windows.
2988 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
2989 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
2990 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
2991 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
2992 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
2993 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
2994 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
2995 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
3000 * [The `format!` macro and friends now allow a single argument to be formatted
3001 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
3002 * [The lifetime bounds on `[T]::binary_search_by` and
3003 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
3004 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
3005 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
3006 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
3007 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
3008 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
3009 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
3010 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
3011 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
3012 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
3013 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
3014 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
3015 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
3016 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
3017 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
3018 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
3019 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
3020 * [`mpsc::sync_channel` `Receiver`s return any available message before
3021 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
3022 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
3023 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
3028 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
3029 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
3030 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
3031 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
3032 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
3033 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
3034 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
3035 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
3036 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
3037 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
3038 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
3039 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
3040 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
3041 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
3042 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
3043 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
3048 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
3049 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
3054 * [Test binaries now support a `--test-threads` argument to specify the number
3055 of threads used to run tests, and which acts the same as the
3056 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
3057 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
3058 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
3059 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
3060 * [Rust releases now come with source packages that can be installed by rustup
3061 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
3062 The resulting source code can be used by tools and IDES, located in the
3063 sysroot under `lib/rustlib/src`.
3068 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
3069 * Many minor improvements to the documentation.
3070 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
3075 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
3076 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
3077 * [When formatting strings, if "precision" is specified, the "fill",
3078 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
3079 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
3082 Version 1.11.0 (2016-08-18)
3083 ===========================
3088 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
3089 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
3090 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
3091 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
3092 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
3097 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
3098 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
3099 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
3100 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
3101 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
3102 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
3103 (in libcore - previously stabilized in libstd)
3104 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
3105 (in libcore - previously stabilized in libstd)
3106 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
3107 (in libcore - previously stabilized in libstd)
3108 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
3109 (in libcore - previously stabilized in libstd)
3110 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3111 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3112 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
3113 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
3118 * [The `thread_local!` macro supports multiple definitions in a single
3119 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
3120 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
3121 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
3122 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
3123 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
3124 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
3125 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
3126 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
3131 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
3132 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
3133 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
3134 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
3135 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
3136 and `-vv` prints warnings for all crates.
3137 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
3138 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
3139 This provides room for expansion by arbitrary tools.
3140 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
3141 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
3142 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
3143 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
3144 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
3145 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
3146 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
3151 * [Caching projections speeds up type check dramatically for some
3152 workloads](https://github.com/rust-lang/rust/pull/33816)
3153 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
3154 This hasher is faster, but is believed to provide sufficient
3155 protection from collision attacks.
3156 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
3161 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
3162 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
3163 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
3164 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
3165 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
3170 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
3171 * [When emitting debug info, rustc emits frame pointers for closures,
3172 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
3173 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
3174 * Many more errors have been given error codes and extended
3176 * API documentation continues to be improved, with many new examples
3181 * [rustc no longer hangs when dependencies recursively re-export
3182 submodules](https://github.com/rust-lang/rust/pull/34542)
3183 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
3184 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
3185 rewritten](https://github.com/rust-lang/rust/pull/33895)
3186 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
3187 No targets use this yet, but it works toward AVR support.
3192 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
3193 * [The new follow-set rules that place restrictions on `macro_rules!`
3194 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
3195 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
3196 and has been a warning since 1.10.
3197 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
3198 This causes breakage in some corner cases.
3201 Version 1.10.0 (2016-07-07)
3202 ===========================
3207 * [Allow `concat_idents!` in type positions as well as in expression
3208 positions](https://github.com/rust-lang/rust/pull/33735).
3209 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
3210 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
3211 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
3212 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
3213 * [`panic!` can be converted to a runtime abort with the
3214 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
3215 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3216 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
3217 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
3218 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-cdylib.md).
3219 Note that Cargo does not yet directly support cdylibs.
3224 * `os::windows::fs::OpenOptionsExt::access_mode`
3225 * `os::windows::fs::OpenOptionsExt::share_mode`
3226 * `os::windows::fs::OpenOptionsExt::custom_flags`
3227 * `os::windows::fs::OpenOptionsExt::attributes`
3228 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
3229 * `os::unix::fs::OpenOptionsExt::custom_flags`
3230 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
3231 * `Default for sync::Weak`
3232 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
3233 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
3234 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
3235 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
3236 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
3237 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
3238 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
3239 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
3240 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
3241 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
3242 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
3243 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
3244 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
3245 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
3246 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
3247 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
3248 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
3249 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
3250 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
3251 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
3252 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
3253 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
3254 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
3255 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
3256 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
3257 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
3258 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
3259 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
3260 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
3261 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
3262 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
3263 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
3264 * Read/Write/RawFd impls for `UnixStream`
3265 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
3266 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
3267 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
3268 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
3269 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
3270 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
3271 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
3272 * RawFd impls for `UnixListener`
3273 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
3274 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
3275 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
3276 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
3277 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
3278 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
3279 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
3280 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
3281 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
3282 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
3283 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
3284 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
3285 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
3286 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
3287 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
3288 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
3289 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
3290 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
3291 * RawFd impls for `UnixDatagram`
3292 * `{BTree,Hash}Map::values_mut`
3293 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/std/primitive.slice.html#method.binary_search_by_key)
3298 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
3299 The semantics of this minor method are subtle and probably not what
3301 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
3302 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
3303 will fall back to `/dev/urandom` temporarily to avoid blocking
3304 during early boot](https://github.com/rust-lang/rust/pull/33086).
3305 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
3306 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
3307 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
3308 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
3309 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
3310 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
3311 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
3315 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
3316 This controls the runtime behavior of the `panic!` macro
3317 and can be either "unwind" (the default), or "abort".
3318 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3319 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
3320 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
3321 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
3322 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
3323 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
3324 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
3325 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
3326 By default they are retried twice, which can be customized with the
3327 `net.retry` value in `.cargo/config`.
3328 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
3329 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
3330 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
3331 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
3332 Makes it possible to install multiple crates in parallel.
3333 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
3334 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
3335 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
3336 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
3337 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
3338 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
3343 * [rustc memory usage was reduced by refactoring the context used for
3344 type checking](https://github.com/rust-lang/rust/pull/33425).
3345 * [Speed up creation of `HashMap`s by caching the random keys used
3346 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
3347 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
3348 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
3349 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
3350 10x faster than the previous lookup tables.
3351 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
3356 * Many incremental improvements to documentation and rustdoc.
3357 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
3358 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
3359 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
3360 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
3361 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
3362 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
3363 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
3368 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
3369 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
3370 * [`std` no longer prints backtraces on platforms where the running
3371 module must be loaded with `env::current_exe`, which can't be relied
3372 on](https://github.com/rust-lang/rust/pull/33554).
3373 * This release includes std binaries for the i586-unknown-linux-gnu,
3374 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
3375 i586 target is for old x86 hardware without SSE2, and the armv7
3376 target is for Android running on modern ARM architectures.
3377 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
3378 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
3379 * [On Unix the runtime aborts by calling `libc::abort` instead of
3380 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
3381 * [Rust is now bootstrapped from the previous release of Rust,
3382 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
3387 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
3388 * [`target_env` for Linux ARM targets is just `gnu`, not
3389 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
3390 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
3391 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
3392 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
3393 Affects how macros are parsed.
3394 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
3395 * [Feature-gated attributes on macro-generated macro invocations are
3396 now rejected](https://github.com/rust-lang/rust/pull/32791).
3397 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
3398 This caused some minor changes to type inference.
3401 Version 1.9.0 (2016-05-26)
3402 ==========================
3407 * The `#[deprecated]` attribute when applied to an API will generate
3408 warnings when used. The warnings may be suppressed with
3409 `#[allow(deprecated)]`. [RFC 1270].
3410 * [`fn` item types are zero sized, and each `fn` names a unique
3411 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3412 `transmute` on a `fn` type will generate a warning for a few cycles,
3413 then will be converted to an error.
3414 * [Field and method resolution understand visibility, so private
3415 fields and methods cannot prevent the proper use of public fields
3416 and methods][1.9fv].
3417 * [The parser considers unicode codepoints in the
3418 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
3424 * [`std::panic::catch_unwind`][] (renamed from `recover`)
3425 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
3426 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
3427 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
3428 * [`str::is_char_boundary`]
3429 * [`<*const T>::as_ref`]
3430 * [`<*mut T>::as_ref`]
3431 * [`<*mut T>::as_mut`]
3432 * [`AsciiExt::make_ascii_uppercase`]
3433 * [`AsciiExt::make_ascii_lowercase`]
3434 * [`char::decode_utf16`]
3435 * [`char::DecodeUtf16`]
3436 * [`char::DecodeUtf16Error`]
3437 * [`char::DecodeUtf16Error::unpaired_surrogate`]
3438 * [`BTreeSet::take`]
3439 * [`BTreeSet::replace`]
3442 * [`HashSet::replace`]
3444 * [`OsString::with_capacity`]
3445 * [`OsString::clear`]
3446 * [`OsString::capacity`]
3447 * [`OsString::reserve`]
3448 * [`OsString::reserve_exact`]
3449 * [`OsStr::is_empty`]
3451 * [`std::os::unix::thread`]
3454 * [`JoinHandleExt::as_pthread_t`]
3455 * [`JoinHandleExt::into_pthread_t`]
3456 * [`HashSet::hasher`]
3457 * [`HashMap::hasher`]
3458 * [`CommandExt::exec`]
3459 * [`File::try_clone`]
3460 * [`SocketAddr::set_ip`]
3461 * [`SocketAddr::set_port`]
3462 * [`SocketAddrV4::set_ip`]
3463 * [`SocketAddrV4::set_port`]
3464 * [`SocketAddrV6::set_ip`]
3465 * [`SocketAddrV6::set_port`]
3466 * [`SocketAddrV6::set_flowinfo`]
3467 * [`SocketAddrV6::set_scope_id`]
3468 * [`slice::copy_from_slice`]
3469 * [`ptr::read_volatile`]
3470 * [`ptr::write_volatile`]
3471 * [`OpenOptions::create_new`]
3472 * [`TcpStream::set_nodelay`]
3473 * [`TcpStream::nodelay`]
3474 * [`TcpStream::set_ttl`]
3475 * [`TcpStream::ttl`]
3476 * [`TcpStream::set_only_v6`]
3477 * [`TcpStream::only_v6`]
3478 * [`TcpStream::take_error`]
3479 * [`TcpStream::set_nonblocking`]
3480 * [`TcpListener::set_ttl`]
3481 * [`TcpListener::ttl`]
3482 * [`TcpListener::set_only_v6`]
3483 * [`TcpListener::only_v6`]
3484 * [`TcpListener::take_error`]
3485 * [`TcpListener::set_nonblocking`]
3486 * [`UdpSocket::set_broadcast`]
3487 * [`UdpSocket::broadcast`]
3488 * [`UdpSocket::set_multicast_loop_v4`]
3489 * [`UdpSocket::multicast_loop_v4`]
3490 * [`UdpSocket::set_multicast_ttl_v4`]
3491 * [`UdpSocket::multicast_ttl_v4`]
3492 * [`UdpSocket::set_multicast_loop_v6`]
3493 * [`UdpSocket::multicast_loop_v6`]
3494 * [`UdpSocket::set_multicast_ttl_v6`]
3495 * [`UdpSocket::multicast_ttl_v6`]
3496 * [`UdpSocket::set_ttl`]
3497 * [`UdpSocket::ttl`]
3498 * [`UdpSocket::set_only_v6`]
3499 * [`UdpSocket::only_v6`]
3500 * [`UdpSocket::join_multicast_v4`]
3501 * [`UdpSocket::join_multicast_v6`]
3502 * [`UdpSocket::leave_multicast_v4`]
3503 * [`UdpSocket::leave_multicast_v6`]
3504 * [`UdpSocket::take_error`]
3505 * [`UdpSocket::connect`]
3506 * [`UdpSocket::send`]
3507 * [`UdpSocket::recv`]
3508 * [`UdpSocket::set_nonblocking`]
3513 * [`std::sync::Once` is poisoned if its initialization function
3515 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
3516 * [Most types implement `fmt::Debug`][1.9db].
3517 * [The default buffer size used by `BufReader` and `BufWriter` was
3518 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
3519 used by other languages.
3520 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
3521 `Duration` additionally implements `*=` and `/=`][1.9ta].
3522 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
3523 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
3524 * [`Chain` implements `BufRead`][1.9ch].
3525 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
3530 * [Cargo can now run concurrently][1.9cc].
3531 * [Top-level overrides allow specific revisions of crates to be
3532 overridden through the entire crate graph][1.9ct]. This is intended
3533 to make upgrades easier for large projects, by allowing crates to be
3534 forked temporarily until they've been upgraded and republished.
3535 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
3536 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
3537 on the commandline][1.9cf]. `rustc` arguments can also be specified
3538 in the `build.rustflags` configuration key.
3543 * [The time complexity of comparing variables for equivalence during type
3544 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
3545 to major compilation time improvement in some scenarios.
3546 * [`ToString` is specialized for `str`, giving it the same performance
3547 as `to_owned`][1.9ts].
3548 * [Spawning processes with `Command::output` no longer creates extra
3550 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
3551 for C-like enums][1.9cl].
3556 * [Passing the `--quiet` flag to a test runner will produce
3557 much-abbreviated output][1.9q].
3558 * The Rust Project now publishes std binaries for the
3559 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
3560 `i586-pc-windows-msvc` targets.
3565 * [`std::sync::Once` is poisoned if its initialization function
3567 * [It is illegal to define methods with the same name in overlapping
3568 inherent `impl` blocks][1.9sn].
3569 * [`fn` item types are zero sized, and each `fn` names a unique
3570 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3571 `transmute` on a `fn` type will generate a warning for a few cycles,
3572 then will be converted to an error.
3573 * [Improvements to const evaluation may trigger new errors when integer
3574 literals are out of range][1.9ce].
3577 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
3578 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
3579 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
3580 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
3581 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
3582 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
3583 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
3584 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
3585 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
3586 [1.9db]: https://github.com/rust-lang/rust/pull/32054
3587 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
3588 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
3589 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
3590 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
3591 [1.9o]: https://github.com/rust-lang/rust/pull/32325
3592 [1.9q]: https://github.com/rust-lang/rust/pull/31887
3593 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
3594 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
3595 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
3596 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
3597 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
3598 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
3599 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
3600 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
3601 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3602 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
3603 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3604 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
3605 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
3606 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
3607 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
3608 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
3609 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
3610 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
3611 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
3612 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
3613 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
3614 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
3615 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
3616 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
3617 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
3618 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
3619 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
3620 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
3621 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
3622 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
3623 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
3624 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
3625 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
3626 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
3627 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
3628 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
3629 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
3630 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
3631 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
3632 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
3633 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
3634 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
3635 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
3636 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
3637 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3638 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3639 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3640 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3641 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3642 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3643 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
3644 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3645 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
3646 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3647 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3648 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3649 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3650 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3651 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
3652 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
3653 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
3654 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
3655 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
3656 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
3657 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
3658 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
3659 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
3660 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
3661 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
3662 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
3663 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
3664 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
3665 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
3666 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
3667 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
3668 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
3669 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
3670 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
3671 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
3672 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
3673 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
3674 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
3675 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
3676 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
3677 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
3678 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
3679 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
3680 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
3681 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
3682 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
3683 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
3684 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
3685 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
3686 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
3689 Version 1.8.0 (2016-04-14)
3690 ==========================
3695 * Rust supports overloading of compound assignment statements like
3696 `+=` by implementing the [`AddAssign`], [`SubAssign`],
3697 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
3698 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
3700 * Empty structs can be defined with braces, as in `struct Foo { }`, in
3701 addition to the non-braced form, `struct Foo;`. [RFC 218].
3707 * [`str::encode_utf16`][] (renamed from `utf16_units`)
3708 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
3711 * [`ptr::drop_in_place`]
3713 * [`time::SystemTime`]
3715 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
3716 * [`Instant::elapsed`]
3717 * [`SystemTime::now`]
3718 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
3719 * [`SystemTime::elapsed`]
3720 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
3721 * [`SystemTimeError`]
3722 * [`SystemTimeError::duration`]
3723 * Various impls for `SystemTimeError`
3725 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
3726 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
3727 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
3728 * [The `write!` and `writeln!` macros correctly emit errors if any of
3729 their arguments can't be formatted][1.8w].
3730 * [Various I/O functions support large files on 32-bit Linux][1.8l].
3731 * [The Unix-specific `raw` modules, which contain a number of
3732 redefined C types are deprecated][1.8r], including `os::raw::unix`,
3733 `os::raw::macos`, and `os::raw::linux`. These modules defined types
3734 such as `ino_t` and `dev_t`. The inconsistency of these definitions
3735 across platforms was making it difficult to implement `std`
3736 correctly. Those that need these definitions should use the `libc`
3738 * The Unix-specific `MetadataExt` traits, including
3739 `os::unix::fs::MetadataExt`, which expose values such as inode
3740 numbers [no longer return platform-specific types][1.8r], but
3741 instead return widened integers. [RFC 1415].
3742 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
3743 * [Atomic loads and stores are not volatile][1.8a].
3744 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
3749 * [Inlining hash functions lead to a 3% compile-time improvement in
3750 some workloads][1.8h].
3751 * When using jemalloc, its symbols are [unprefixed so that it
3752 overrides the libc malloc implementation][1.8h]. This means that for
3753 rustc, LLVM is now using jemalloc, which results in a 6%
3754 compile-time improvement on a specific workload.
3755 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
3760 * [32-bit MSVC builds finally implement unwinding][1.8ms].
3761 i686-pc-windows-msvc is now considered a tier-1 platform.
3762 * [The `--print targets` flag prints a list of supported targets][1.8t].
3763 * [The `--print cfg` flag prints the `cfg`s defined for the current
3765 * [`rustc` can be built with an new Cargo-based build system, written
3766 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
3767 build system. To enable it configure with `configure --rustbuild`.
3768 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
3769 variants while also indicating the total number of missing variants
3770 if more than 3][1.8m].
3771 * [Executable stacks are disabled on Linux and BSD][1.8nx].
3772 * The Rust Project now publishes binary releases of the standard
3773 library for a number of tier-2 targets:
3774 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
3775 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
3776 `x86_64-rumprun-netbsd`. These can be installed with
3777 tools such as [multirust][1.8mr].
3782 * [`cargo init` creates a new Cargo project in the current
3783 directory][1.8ci]. It is otherwise like `cargo new`.
3784 * [Cargo has configuration keys for `-v` and
3785 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
3786 `[term]` section of `.cargo/config`.
3787 * [Configuration keys that evaluate to strings or integers can be set
3788 via environment variables][1.8ce]. For example the `build.jobs` key
3789 can be set via `CARGO_BUILD_JOBS`. Environment variables take
3790 precedence over config files.
3791 * [Target-specific dependencies support Rust `cfg` syntax for
3792 describing targets][1.8cfg] so that dependencies for multiple
3793 targets can be specified together. [RFC 1361].
3794 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
3795 `RUSTDOC` take precedence over the `build.target-dir`,
3796 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
3797 * [The child process tree is killed on Windows when Cargo is
3799 * [The `build.target` configuration value sets the target platform,
3800 like `--target`][1.8ct].
3805 * [Unstable compiler flags have been further restricted][1.8u]. Since
3806 1.0 `-Z` flags have been considered unstable, and other flags that
3807 were considered unstable additionally required passing `-Z
3808 unstable-options` to access. Unlike unstable language and library
3809 features though, these options have been accessible on the stable
3810 release channel. Going forward, *new unstable flags will not be
3811 available on the stable release channel*, and old unstable flags
3812 will warn about their usage. In the future, all unstable flags will
3813 be unavailable on the stable release channel.
3814 * [It is no longer possible to `match` on empty enum variants using
3815 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
3816 * The Unix-specific `MetadataExt` traits, including
3817 `os::unix::fs::MetadataExt`, which expose values such as inode
3818 numbers [no longer return platform-specific types][1.8r], but
3819 instead return widened integers. [RFC 1415].
3820 * [Modules sourced from the filesystem cannot appear within arbitrary
3821 blocks, but only within other modules][1.8mf].
3822 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
3823 * On Unix, [stack overflow triggers a runtime abort instead of a
3825 * [`Command::spawn` and its equivalents return an error if any of
3826 its command-line arguments contain interior `NUL`s][1.8n].
3827 * [Tuple and unit enum variants from other crates are in the type
3829 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
3830 type instead of `.a` files][1.8st]. Additionally, for the MSVC
3831 toolchain, `rustc` emits import libraries named `foo.dll.lib`
3832 instead of `foo.lib`.
3835 [1.8a]: https://github.com/rust-lang/rust/pull/30962
3836 [1.8b]: https://github.com/rust-lang/rust/pull/31123
3837 [1.8c]: https://github.com/rust-lang/rust/pull/31530
3838 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
3839 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
3840 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
3841 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
3842 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
3843 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
3844 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
3845 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
3846 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
3847 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
3848 [1.8h]: https://github.com/rust-lang/rust/pull/31460
3849 [1.8l]: https://github.com/rust-lang/rust/pull/31668
3850 [1.8m]: https://github.com/rust-lang/rust/pull/31020
3851 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
3852 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
3853 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
3854 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
3855 [1.8n]: https://github.com/rust-lang/rust/pull/31056
3856 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
3857 [1.8r]: https://github.com/rust-lang/rust/pull/31551
3858 [1.8so]: https://github.com/rust-lang/rust/pull/31333
3859 [1.8st]: https://github.com/rust-lang/rust/pull/29520
3860 [1.8t]: https://github.com/rust-lang/rust/pull/31358
3861 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
3862 [1.8u]: https://github.com/rust-lang/rust/pull/31793
3863 [1.8v]: https://github.com/rust-lang/rust/pull/31757
3864 [1.8w]: https://github.com/rust-lang/rust/pull/31904
3865 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
3866 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
3867 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
3868 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
3869 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
3870 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
3871 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
3872 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
3873 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
3874 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
3875 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
3876 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
3877 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
3878 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
3879 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
3880 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
3881 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
3882 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
3883 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
3884 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
3885 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
3886 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
3887 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
3888 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
3889 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
3890 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
3891 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
3892 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
3893 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
3894 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
3897 Version 1.7.0 (2016-03-03)
3898 ==========================
3905 * [`Path::strip_prefix`][] (renamed from relative_from)
3906 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
3908 * [`Ipv4Addr::is_loopback`]
3909 * [`Ipv4Addr::is_private`]
3910 * [`Ipv4Addr::is_link_local`]
3911 * [`Ipv4Addr::is_multicast`]
3912 * [`Ipv4Addr::is_broadcast`]
3913 * [`Ipv4Addr::is_documentation`]
3915 * [`Ipv6Addr::is_unspecified`]
3916 * [`Ipv6Addr::is_loopback`]
3917 * [`Ipv6Addr::is_multicast`]
3920 * [`Vec::as_mut_slice`]
3922 * [`String::as_str`]
3923 * [`String::as_mut_str`]
3925 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
3927 * `<[T]>::`[`sort_by_key`]
3928 * checked, saturated, and overflowing operations
3929 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
3930 * [`i32::saturating_mul`]
3931 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
3932 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
3933 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
3934 * [`u32::saturating_mul`]
3935 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
3936 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
3937 * and checked, saturated, and overflowing operations for other primitive types
3939 * [`ffi::IntoStringError`]
3940 * [`CString::into_string`]
3941 * [`CString::into_bytes`]
3942 * [`CString::into_bytes_with_nul`]
3943 * `From<CString> for Vec<u8>`
3945 * [`IntoStringError::into_cstring`]
3946 * [`IntoStringError::utf8_error`]
3947 * `Error for IntoStringError`
3949 * [`std::hash::BuildHasher`]
3950 * [`BuildHasher::Hasher`]
3951 * [`BuildHasher::build_hasher`]
3952 * [`std::hash::BuildHasherDefault`]
3953 * [`HashMap::with_hasher`]
3954 * [`HashMap::with_capacity_and_hasher`]
3955 * [`HashSet::with_hasher`]
3956 * [`HashSet::with_capacity_and_hasher`]
3957 * [`std::collections::hash_map::RandomState`]
3958 * [`RandomState::new`]
3959 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
3960 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
3961 from bytes is faster.
3962 * [The performance of `LineWriter` (and thus `io::stdout`) was
3963 improved by using `memchr` to search for newlines][1.7m].
3964 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
3965 `f64` variants were stabilized previously.
3966 * [`BTreeMap` was rewritten to use less memory and improve the performance
3967 of insertion and iteration, the latter by as much as 5x][1.7bm].
3968 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
3969 covariant over their contained type][1.7bt].
3970 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
3971 over their contained type][1.7ll].
3972 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
3974 * [`Any` is implemented for unsized types][1.7a].
3975 * [`Hash` is implemented for `Duration`][1.7h].
3980 * [When running tests with `--test`, rustdoc will pass `--cfg`
3981 arguments to the compiler][1.7dt].
3982 * [The compiler is built with RPATH information by default][1.7rpa].
3983 This means that it will be possible to run `rustc` when installed in
3984 unusual configurations without configuring the dynamic linker search
3986 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
3987 any RPATH entries (emitted with `-C rpath`) *not* take precedence
3988 over `LD_LIBRARY_PATH`.
3993 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
3994 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
3995 * [The `rerun-if-changed` build script directive no longer causes the
3996 build script to incorrectly run twice in certain scenarios][1.7rr].
4001 * Soundness fixes to the interactions between associated types and
4002 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
4003 code that violates the new rules. This is a significant change that
4004 is known to break existing code, so it has emitted warnings for the
4005 new error cases since 1.4 to give crate authors time to adapt. The
4006 details of what is changing are subtle; read the RFC for more.
4007 * [Several bugs in the compiler's visibility calculations were
4008 fixed][1.7v]. Since this was found to break significant amounts of
4009 code, the new errors will be emitted as warnings for several release
4010 cycles, under the `private_in_public` lint.
4011 * Defaulted type parameters were accidentally accepted in positions
4012 that were not intended. In this release, [defaulted type parameters
4013 appearing outside of type definitions will generate a
4014 warning][1.7d], which will become an error in future releases.
4015 * [Parsing "." as a float results in an error instead of 0][1.7p].
4016 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
4017 * [Borrows of closure parameters may not outlive the closure][1.7bc].
4019 [1.7a]: https://github.com/rust-lang/rust/pull/30928
4020 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
4021 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
4022 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
4023 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
4024 [1.7d]: https://github.com/rust-lang/rust/pull/30724
4025 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
4026 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
4027 [1.7f]: https://github.com/rust-lang/rust/pull/30672
4028 [1.7h]: https://github.com/rust-lang/rust/pull/30818
4029 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
4030 [1.7m]: https://github.com/rust-lang/rust/pull/30381
4031 [1.7p]: https://github.com/rust-lang/rust/pull/30681
4032 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
4033 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
4034 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
4035 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
4036 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
4037 [1.7v]: https://github.com/rust-lang/rust/pull/29973
4038 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4039 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4040 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
4041 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
4042 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
4043 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
4044 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
4045 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
4046 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
4047 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
4048 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
4049 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
4050 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
4051 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
4052 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
4053 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
4054 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
4055 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
4056 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
4057 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
4058 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
4059 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
4060 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
4061 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
4062 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
4063 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
4064 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
4065 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
4066 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
4067 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
4068 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
4069 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
4070 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
4071 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
4072 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
4073 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
4074 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
4075 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
4076 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
4077 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
4078 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
4079 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
4080 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
4081 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
4082 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
4083 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
4084 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
4085 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
4086 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
4087 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
4088 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
4089 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
4090 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
4091 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
4092 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
4093 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
4094 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
4095 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
4096 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
4097 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
4100 Version 1.6.0 (2016-01-21)
4101 ==========================
4106 * The `#![no_std]` attribute causes a crate to not be linked to the
4107 standard library, but only the [core library][1.6co], as described
4108 in [RFC 1184]. The core library defines common types and traits but
4109 has no platform dependencies whatsoever, and is the basis for Rust
4110 software in environments that cannot support a full port of the
4111 standard library, such as operating systems. Most of the core
4112 library is now stable.
4118 [`Read::read_exact`],
4119 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
4120 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
4121 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
4122 [`os::unix::fs::DirBuilderExt`],
4123 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
4124 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
4125 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
4126 [`collections::hash_map::Drain`],
4127 [`collections::hash_map::HashMap::drain`],
4128 [`collections::hash_set::Drain`],
4129 [`collections::hash_set::HashSet::drain`],
4130 [`collections::binary_heap::Drain`],
4131 [`collections::binary_heap::BinaryHeap::drain`],
4132 [`Vec::extend_from_slice`][] (renamed from `push_all`),
4133 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
4134 [`RwLock::into_inner`],
4135 [`Iterator::min_by_key`][] (renamed from `min_by`),
4136 [`Iterator::max_by_key`][] (renamed from `max_by`).
4137 * The [core library][1.6co] is stable, as are most of its APIs.
4138 * [The `assert_eq!` macro supports arguments that don't implement
4139 `Sized`][1.6ae], such as arrays. In this way it behaves more like
4141 * Several timer functions that take duration in milliseconds [are
4142 deprecated in favor of those that take `Duration`][1.6ms]. These
4143 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
4144 `thread::park_timeout_ms`.
4145 * The algorithm by which `Vec` reserves additional elements was
4146 [tweaked to not allocate excessive space][1.6a] while still growing
4148 * `From` conversions are [implemented from integers to floats][1.6f]
4149 in cases where the conversion is lossless. Thus they are not
4150 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
4151 or `f64`. They are also not implemented for `isize` and `usize`
4152 because the implementations would be platform-specific. `From` is
4153 also implemented from `f32` to `f64`.
4154 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
4155 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
4156 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
4157 * [`BinaryHeap` was refactored][1.6bh] for modest performance
4159 * Sorting slices that are already sorted [is 50% faster in some
4165 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
4166 * Cargo build scripts can specify their dependencies by emitting the
4167 [`rerun-if-changed`][1.6rr] key.
4168 * crates.io will reject publication of crates with dependencies that
4169 have a wildcard version constraint. Crates with wildcard
4170 dependencies were seen to cause a variety of problems, as described
4171 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
4173 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
4174 release folder. A variety of artifacts that Cargo failed to clean
4175 are now correctly deleted.
4180 * The `unreachable_code` lint [warns when a function call's argument
4182 * The parser indicates [failures that may be caused by
4183 confusingly-similar Unicode characters][1.6uc]
4184 * Certain macro errors [are reported at definition time][1.6m], not
4190 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
4191 environment variable when locating crates. This was a pre-cargo
4192 feature for integrating with the package manager that was
4193 accidentally never removed.
4194 * [A number of bugs were fixed in the privacy checker][1.6p] that
4195 could cause previously-accepted code to break.
4196 * [Modules and unit/tuple structs may not share the same name][1.6ts].
4197 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
4198 struct pattern syntax (`Foo(..)`) can no longer be used to match
4199 unit structs. This is a warning now, but will become an error in
4200 future releases. Patterns that share the same name as a const are
4202 * A bug was fixed that causes [rustc not to apply default type
4203 parameters][1.6xc] when resolving certain method implementations of
4204 traits defined in other crates.
4206 [1.6a]: https://github.com/rust-lang/rust/pull/29454
4207 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
4208 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
4209 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
4210 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
4211 [1.6co]: http://doc.rust-lang.org/core/index.html
4212 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
4213 [1.6f]: https://github.com/rust-lang/rust/pull/29129
4214 [1.6m]: https://github.com/rust-lang/rust/pull/29828
4215 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
4216 [1.6p]: https://github.com/rust-lang/rust/pull/29726
4217 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
4218 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
4219 [1.6s]: https://github.com/rust-lang/rust/pull/29675
4220 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
4221 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
4222 [1.6us]: https://github.com/rust-lang/rust/pull/29383
4223 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
4224 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
4225 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4226 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
4227 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
4228 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
4229 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
4230 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
4231 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
4232 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
4233 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
4234 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
4235 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
4236 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
4237 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
4238 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
4239 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
4240 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
4241 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
4242 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
4243 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
4244 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
4245 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
4246 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
4247 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
4248 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
4249 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
4250 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
4251 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
4252 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
4255 Version 1.5.0 (2015-12-10)
4256 ==========================
4258 * ~700 changes, numerous bugfixes
4264 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
4265 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
4266 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
4267 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
4268 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
4269 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
4270 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
4271 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
4272 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
4273 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
4274 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
4275 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
4276 [`Path::read_link`], [`Path::symlink_metadata`],
4277 [`Utf8Error::valid_up_to`], [`Vec::resize`],
4278 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
4279 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
4280 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
4281 [`slice::split_first_mut`], [`slice::split_first`],
4282 [`slice::split_last_mut`], [`slice::split_last`],
4283 [`char::from_u32_unchecked`], [`fs::canonicalize`],
4284 [`str::MatchIndices`], [`str::RMatchIndices`],
4285 [`str::match_indices`], [`str::rmatch_indices`],
4286 [`str::slice_mut_unchecked`], [`string::ParseError`].
4287 * Rust applications hosted on crates.io can be installed locally to
4288 `~/.cargo/bin` with the [`cargo install`] command. Among other
4289 things this makes it easier to augment Cargo with new subcommands:
4290 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
4291 invoked as `cargo foo`.
4292 * Crates with wildcard (`*`) dependencies will [emit warnings when
4293 published][1.5w]. In 1.6 it will no longer be possible to publish
4294 crates with wildcard dependencies.
4299 * The rules determining when a particular lifetime must outlive
4300 a particular value (known as '[dropck]') have been [modified
4301 to not rely on parametricity][1.5p].
4302 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
4303 and `Arc`][1.5a]. Because these smart pointer types implement
4304 `Deref`, this causes breakage in cases where the interior type
4305 contains methods of the same name.
4306 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
4307 that they could drop their content. Soundness fix.
4308 * All method invocations are [properly checked][1.5wf1] for
4309 [well-formedness][1.5wf2]. Soundness fix.
4310 * Traits whose supertraits contain `Self` are [not object
4311 safe][1.5o]. Soundness fix.
4312 * Target specifications support a [`no_default_libraries`][1.5nd]
4313 setting that controls whether `-nodefaultlibs` is passed to the
4314 linker, and in turn the `is_like_windows` setting no longer affects
4315 the `-nodefaultlibs` flag.
4316 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
4317 * The `#[inline]` and `#[repr]` attributes [can only appear
4318 in valid locations][1.5at].
4319 * Native libraries linked from the local crate are [passed to
4320 the linker before native libraries from upstream crates][1.5nl].
4321 * Two rarely-used attributes, `#[no_debug]` and
4322 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
4323 * Negation of unsigned integers, which has been a warning for
4324 several releases, [is now behind a feature gate and will
4325 generate errors][1.5nu].
4326 * The parser accidentally accepted visibility modifiers on
4327 enum variants, a bug [which has been fixed][1.5ev].
4328 * [A bug was fixed that allowed `use` statements to import unstable
4334 * When evaluating expressions at compile-time that are not
4335 compile-time constants (const-evaluating expressions in non-const
4336 contexts), incorrect code such as overlong bitshifts and arithmetic
4337 overflow will [generate a warning instead of an error][1.5ce],
4338 delaying the error until runtime. This will allow the
4339 const-evaluator to be expanded in the future backwards-compatibly.
4340 * The `improper_ctypes` lint [no longer warns about using `isize` and
4341 `usize` in FFI][1.5ict].
4346 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
4348 * `Default` is [implemented for mutable slices][1.5d].
4349 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
4350 * There are now `From` conversions [between floating point
4351 types][1.5f] where the conversions are lossless.
4352 * There are now `From` conversions [between integer types][1.5i] where
4353 the conversions are lossless.
4354 * [`fs::Metadata` implements `Clone`][1.5fs].
4355 * The `parse` method [accepts a leading "+" when parsing
4357 * [`AsMut` is implemented for `Vec`][1.5am].
4358 * The `clone_from` implementations for `String` and `BinaryHeap` [have
4359 been optimized][1.5cf] and no longer rely on the default impl.
4360 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
4361 `unsafe extern "C"` function types now [implement `Clone`,
4362 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
4363 `fmt::Debug` for up to 12 arguments][1.5fp].
4364 * [Dropping `Vec`s is much faster in unoptimized builds when the
4365 element types don't implement `Drop`][1.5dv].
4366 * A bug that caused in incorrect behavior when [combining `VecDeque`
4367 with zero-sized types][1.5vdz] was resolved.
4368 * [`PartialOrd` for slices is faster][1.5po].
4373 * [Crate metadata size was reduced by 20%][1.5md].
4374 * [Improvements to code generation reduced the size of libcore by 3.3
4375 MB and rustc's memory usage by 18MB][1.5m].
4376 * [Improvements to deref translation increased performance in
4377 unoptimized builds][1.5dr].
4378 * Various errors in trait resolution [are deduplicated to only be
4379 reported once][1.5te].
4380 * Rust has preliminary [support for rumprun kernels][1.5rr].
4381 * Rust has preliminary [support for NetBSD on amd64][1.5na].
4383 [1.5use]: https://github.com/rust-lang/rust/pull/28364
4384 [1.5po]: https://github.com/rust-lang/rust/pull/28436
4385 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
4386 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
4387 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
4388 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
4389 [1.5md]: https://github.com/rust-lang/rust/pull/28521
4390 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
4391 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
4392 [1.5na]: https://github.com/rust-lang/rust/pull/28543
4393 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
4394 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
4395 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
4396 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
4397 [1.5te]: https://github.com/rust-lang/rust/pull/28645
4398 [1.5at]: https://github.com/rust-lang/rust/pull/28650
4399 [1.5am]: https://github.com/rust-lang/rust/pull/28663
4400 [1.5m]: https://github.com/rust-lang/rust/pull/28778
4401 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
4402 [1.5a]: https://github.com/rust-lang/rust/pull/28811
4403 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
4404 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
4405 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
4406 [1.5i]: https://github.com/rust-lang/rust/pull/28921
4407 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
4408 [1.5f]: https://github.com/rust-lang/rust/pull/29129
4409 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
4410 [1.5s]: https://github.com/rust-lang/rust/pull/29190
4411 [1.5d]: https://github.com/rust-lang/rust/pull/29245
4412 [1.5o]: https://github.com/rust-lang/rust/pull/29259
4413 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
4414 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4415 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
4416 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
4417 [1.5c]: https://github.com/rust-lang/rust/pull/29110
4418 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4419 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
4420 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
4421 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
4422 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
4423 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
4424 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
4425 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
4426 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
4427 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
4428 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
4429 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
4430 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
4431 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
4432 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
4433 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
4434 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
4435 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
4436 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
4437 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
4438 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
4439 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
4440 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
4441 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
4442 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
4443 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
4444 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
4445 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
4446 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
4447 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
4448 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
4449 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
4450 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
4451 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
4452 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
4453 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
4454 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
4455 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
4456 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
4457 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
4458 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
4459 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
4460 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
4461 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
4462 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
4463 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
4464 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
4465 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
4466 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
4467 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
4468 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
4469 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
4470 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
4471 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
4473 Version 1.4.0 (2015-10-29)
4474 ==========================
4476 * ~1200 changes, numerous bugfixes
4481 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
4482 GNU) are now supported and recommended for use.
4487 * [Several changes have been made to fix type soundness and improve
4488 the behavior of associated types][sound]. See [RFC 1214]. Although
4489 we have mostly introduced these changes as warnings this release, to
4490 become errors next release, there are still some scenarios that will
4491 see immediate breakage.
4492 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
4493 line breaks in addition to `\n`][crlf].
4494 * [Loans of `'static` lifetime extend to the end of a function][stat].
4495 * [`str::parse` no longer introduces avoidable rounding error when
4496 parsing floating point numbers. Together with earlier changes to
4497 float formatting/output, "round trips" like f.to_string().parse()
4498 now preserve the value of f exactly. Additionally, leading plus
4499 signs are now accepted][fp3].
4505 * `use` statements that import multiple items [can now rename
4506 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
4507 * [Binops work correctly on fat pointers][binfat].
4508 * `pub extern crate`, which does not behave as expected, [issues a
4509 warning][pec] until a better solution is found.
4514 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
4515 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
4516 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
4517 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
4518 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
4519 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
4520 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
4521 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
4522 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
4523 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
4524 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
4525 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
4526 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
4527 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
4528 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
4529 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
4530 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
4531 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
4533 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
4534 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
4535 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
4536 `f64::from_str_radix`.
4537 * [Reverse-searching strings is faster with the 'two-way'
4539 * [`std::io::copy` allows `?Sized` arguments][cc].
4540 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
4541 [override `count`, `nth` and `last` with an O(1)
4542 implementation][it].
4543 * [`Default` is implemented for arrays up to `[T; 32]`][d].
4544 * [`IntoRawFd` has been added to the Unix-specific prelude,
4545 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
4547 * [`Extend<String>` and `FromIterator<String` are both implemented for
4549 * [`IntoIterator` is implemented for references to `Option` and
4551 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
4552 Copy`][ext] as part of [RFC 839]. This will cause type inference
4553 breakage in rare situations.
4554 * [`BinaryHeap` implements `Debug`][bh2].
4555 * [`Borrow` and `BorrowMut` are implemented for fixed-size
4557 * [`extern fn`s with the "Rust" and "C" ABIs implement common
4558 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
4559 * [String comparison is faster][faststr].
4560 * `&mut T` where `T: std::fmt::Write` [also implements
4561 `std::fmt::Write`][mutw].
4562 * [A stable regression in `VecDeque::push_back` and other
4563 capacity-altering methods that caused panics for zero-sized types
4565 * [Function pointers implement traits for up to 12 parameters][fp2].
4570 * The compiler [no longer uses the 'morestack' feature to prevent
4571 stack overflow][mm]. Instead it uses guard pages and stack
4572 probes (though stack probes are not yet implemented on any platform
4574 * [The compiler matches traits faster when projections are involved][p].
4575 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
4577 * [Cargo now displays useful information about what its doing during
4578 `cargo update`][cu].
4580 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
4581 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
4582 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
4583 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
4584 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
4585 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
4586 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
4587 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
4588 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
4589 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
4590 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
4591 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
4592 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
4593 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
4594 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
4595 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
4596 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
4597 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
4598 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4599 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4600 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4601 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4602 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4603 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4604 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4605 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4606 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
4607 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
4608 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
4609 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
4610 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
4611 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
4612 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
4613 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
4614 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
4615 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
4616 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
4617 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
4618 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
4619 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
4620 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
4621 [bh2]: https://github.com/rust-lang/rust/pull/28156
4622 [binfat]: https://github.com/rust-lang/rust/pull/28270
4623 [bm]: https://github.com/rust-lang/rust/pull/28197
4624 [cc]: https://github.com/rust-lang/rust/pull/27531
4625 [crlf]: https://github.com/rust-lang/rust/pull/28034
4626 [cu]: https://github.com/rust-lang/cargo/pull/1931
4627 [d]: https://github.com/rust-lang/rust/pull/27825
4628 [dep]: https://github.com/rust-lang/rust/pull/28339
4629 [es]: https://github.com/rust-lang/rust/pull/27956
4630 [ext]: https://github.com/rust-lang/rust/pull/28094
4631 [faststr]: https://github.com/rust-lang/rust/pull/28338
4632 [ffi]: https://github.com/rust-lang/rust/pull/28779
4633 [fp]: https://github.com/rust-lang/rust/pull/28268
4634 [fp2]: https://github.com/rust-lang/rust/pull/28560
4635 [fp3]: https://github.com/rust-lang/rust/pull/27307
4636 [i]: https://github.com/rust-lang/rust/pull/27451
4637 [into2]: https://github.com/rust-lang/rust/pull/28039
4638 [it]: https://github.com/rust-lang/rust/pull/27652
4639 [mm]: https://github.com/rust-lang/rust/pull/27338
4640 [mutw]: https://github.com/rust-lang/rust/pull/28368
4641 [sound]: https://github.com/rust-lang/rust/pull/27641
4642 [p]: https://github.com/rust-lang/rust/pull/27866
4643 [pec]: https://github.com/rust-lang/rust/pull/28486
4644 [pr]: https://github.com/rust-lang/rust/pull/27896
4645 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4646 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4647 [s]: https://github.com/rust-lang/rust/pull/27474
4648 [stab]: https://github.com/rust-lang/rust/pull/28339
4649 [stat]: https://github.com/rust-lang/rust/pull/28321
4650 [vd]: https://github.com/rust-lang/rust/pull/28494
4652 Version 1.3.0 (2015-09-17)
4653 ==============================
4655 * ~900 changes, numerous bugfixes
4660 * The [new object lifetime defaults][nold] have been [turned
4661 on][nold2] after a cycle of warnings about the change. Now types
4662 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
4663 being interpreted as `&'a Box<Trait+'a>` to `&'a
4664 Box<Trait+'static>`.
4665 * [The Rustonomicon][nom] is a new book in the official documentation
4666 that dives into writing unsafe Rust.
4667 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
4668 timekeeping is employed by other std APIs, as well as out-of-tree
4674 * The [new object lifetime defaults][nold] have been [turned
4675 on][nold2] after a cycle of warnings about the change.
4676 * There is a known [regression][lr] in how object lifetime elision is
4677 interpreted, the proper solution for which is undetermined.
4678 * The `#[prelude_import]` attribute, an internal implementation
4679 detail, was accidentally stabilized previously. [It has been put
4680 behind the `prelude_import` feature gate][pi]. This change is
4681 believed to break no existing code.
4682 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4683 [more sane for dynamically sized types][dst3]. Code that relied on
4684 the previous behavior is thought to be broken.
4685 * The `dropck` rules, which checks that destructors can't access
4686 destroyed values, [have been updated][dropck] to match the
4687 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
4688 cause some previously-compiling code to no longer build.
4693 * The [new object lifetime defaults][nold] have been [turned
4694 on][nold2] after a cycle of warnings about the change.
4695 * Semicolons may [now follow types and paths in
4696 macros](https://github.com/rust-lang/rust/pull/27000).
4697 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4698 [more sane for dynamically sized types][dst3]. Code that relied on
4699 the previous behavior is not known to exist, and suspected to be
4701 * `'static` variables [may now be recursive][st].
4702 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
4703 implementations correctly.
4704 * The `dropck` rules, which checks that destructors can't access
4705 destroyed values, [have been updated][dropck] to match the
4711 * The [`Duration`] API, [has been stabilized][ds], as well as the
4712 `std::time` module, which presently contains only `Duration`.
4713 * `Box<str>` and `Box<[T]>` both implement `Clone`.
4714 * The owned C string, [`CString`], implements [`Borrow`] and the
4715 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
4716 these allow C strings to be borrowed and cloned in generic code.
4717 * [`CStr`] implements [`Debug`].
4718 * [`AtomicPtr`] implements [`Debug`].
4719 * [`Error`] trait objects [can be downcast to their concrete types][e]
4720 in many common configurations, using the [`is`], [`downcast`],
4721 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
4723 * Searching for substrings now [employs the two-way algorithm][search]
4724 instead of doing a naive search. This gives major speedups to a
4725 number of methods, including [`contains`][sc], [`find`][sf],
4726 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
4727 [`ends_with`][sew] are also faster.
4728 * The performance of `PartialEq` for slices is [much faster][ps].
4729 * The [`Hash`] trait offers the default method, [`hash_slice`], which
4730 is overridden and optimized by the implementations for scalars.
4731 * The [`Hasher`] trait now has a number of specialized `write_*`
4732 methods for primitive types, for efficiency.
4733 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
4734 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
4735 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
4736 of [`std::error::Error::cause`][iec] also delegates to the inner
4738 * [`process::Child`][pc] gained the [`id`] method, which returns a
4739 `u32` representing the platform-specific process identifier.
4740 * The [`connect`] method on slices is deprecated, replaced by the new
4741 [`join`] method (note that both of these are on the *unstable*
4742 [`SliceConcatExt`] trait, but through the magic of the prelude are
4743 available to stable code anyway).
4744 * The [`Div`] operator is implemented for [`Wrapping`] types.
4745 * [`DerefMut` is implemented for `String`][dms].
4746 * Performance of SipHash (the default hasher for `HashMap`) is
4747 [better for long data][sh].
4748 * [`AtomicPtr`] implements [`Send`].
4749 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
4750 are now [specialized to use uninitialized buffers for increased
4752 * Lifetime parameters of foreign functions [are now resolved
4758 * Rust can now, with some coercion, [produce programs that run on
4759 Windows XP][xp], though XP is not considered a supported platform.
4760 * Porting Rust on Windows from the GNU toolchain to MSVC continues
4761 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
4762 recommended for use in 1.3, though should be fully-functional
4763 in the [64-bit 1.4 beta][b14].
4764 * On Fedora-based systems installation will [properly configure the
4765 dynamic linker][fl].
4766 * The compiler gained many new extended error descriptions, which can
4767 be accessed with the `--explain` flag.
4768 * The `dropck` pass, which checks that destructors can't access
4769 destroyed values, [has been rewritten][dropck]. This fixes some
4770 soundness holes, and as such will cause some previously-compiling
4771 code to no longer build.
4772 * `rustc` now uses [LLVM to write archive files where possible][ar].
4773 Eventually this will eliminate the compiler's dependency on the ar
4775 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
4776 supported FreeBSD on x86_64).
4777 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
4778 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
4780 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
4781 will kill the process instead of leaking][nlp].
4783 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
4784 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
4785 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
4786 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
4787 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
4788 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4789 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4790 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
4791 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
4792 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
4793 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
4794 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
4795 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
4796 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4797 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
4798 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
4799 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
4800 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
4801 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4802 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
4803 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
4804 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
4805 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
4806 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4807 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
4808 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
4809 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
4810 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
4811 [ar]: https://github.com/rust-lang/rust/pull/26926
4812 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
4813 [dms]: https://github.com/rust-lang/rust/pull/26241
4814 [dropck]: https://github.com/rust-lang/rust/pull/27261
4815 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4816 [ds]: https://github.com/rust-lang/rust/pull/26818
4817 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
4818 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
4819 [dst3]: https://github.com/rust-lang/rust/pull/27351
4820 [e]: https://github.com/rust-lang/rust/pull/24793
4821 [f]: https://github.com/rust-lang/rust/pull/26588
4822 [fb]: https://github.com/rust-lang/rust/pull/26959
4823 [fl]: https://github.com/rust-lang/rust-installer/pull/41
4824 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4825 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
4826 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
4827 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
4828 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
4829 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
4830 [lic]: https://github.com/rust-lang/rust/pull/26583
4831 [lnu]: https://github.com/rust-lang/rust/pull/27026
4832 [lr]: https://github.com/rust-lang/rust/issues/27248
4833 [lum]: https://github.com/rust-lang/rust/pull/26378
4834 [lur]: https://github.com/rust-lang/rust/pull/26783
4835 [nlp]: https://github.com/rust-lang/rust/pull/27176
4836 [nold2]: https://github.com/rust-lang/rust/pull/27045
4837 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
4838 [nom]: http://doc.rust-lang.org/nightly/nomicon/
4839 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
4840 [pi]: https://github.com/rust-lang/rust/pull/26699
4841 [ps]: https://github.com/rust-lang/rust/pull/26884
4842 [rte]: https://github.com/rust-lang/rust/pull/26950
4843 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
4844 [search]: https://github.com/rust-lang/rust/pull/26327
4845 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
4846 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
4847 [sh]: https://github.com/rust-lang/rust/pull/27280
4848 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
4849 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
4850 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
4851 [st]: https://github.com/rust-lang/rust/pull/26630
4852 [win1]: https://github.com/rust-lang/rust/pull/26569
4853 [win2]: https://github.com/rust-lang/rust/pull/26741
4854 [win3]: https://github.com/rust-lang/rust/pull/26741
4855 [win4]: https://github.com/rust-lang/rust/pull/27210
4856 [xp]: https://github.com/rust-lang/rust/pull/26569
4858 Version 1.2.0 (2015-08-07)
4859 ==========================
4861 * ~1200 changes, numerous bugfixes
4866 * [Dynamically-sized-type coercions][dst] allow smart pointer types
4867 like `Rc` to contain types without a fixed size, arrays and trait
4868 objects, finally enabling use of `Rc<[T]>` and completing the
4869 implementation of DST.
4870 * [Parallel codegen][parcodegen] is now working again, which can
4871 substantially speed up large builds in debug mode; It also gets
4872 another ~33% speedup when bootstrapping on a 4 core machine (using 8
4873 jobs). It's not enabled by default, but will be "in the near
4874 future". It can be activated with the `-C codegen-units=N` flag to
4876 * This is the first release with [experimental support for linking
4877 with the MSVC linker and lib C on Windows (instead of using the GNU
4878 variants via MinGW)][win]. It is yet recommended only for the most
4879 intrepid Rustaceans.
4880 * Benchmark compilations are showing a 30% improvement in
4881 bootstrapping over 1.1.
4886 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
4887 unicode case mapping, which is a previously-planned change in
4888 behavior and considered a bugfix.
4889 * [`mem::align_of`] now specifies [the *minimum alignment* for
4890 T][align], which is usually the alignment programs are interested
4891 in, and the same value reported by clang's
4892 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
4894 * [The `#[packed]` attribute is no longer silently accepted by the
4895 compiler][packed]. This attribute did nothing and code that
4896 mentioned it likely did not work as intended.
4897 * Associated type defaults are [now behind the
4898 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
4899 defaults *did not work*, but could be mentioned syntactically. As
4900 such this breakage has minimal impact.
4905 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
4906 matching against dereferenceable values.
4911 * The [`Extend`] trait, which grows a collection from an iterator, is
4912 implemented over iterators of references, for `String`, `Vec`,
4913 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
4914 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
4915 * The [`iter::once`] function returns an iterator that yields a single
4916 element, and [`iter::empty`] returns an iterator that yields no
4918 * The [`matches`] and [`rmatches`] methods on `str` return iterators
4919 over substring matches.
4920 * [`Cell`] and [`RefCell`] both implement `Eq`.
4921 * A number of methods for wrapping arithmetic are added to the
4922 integral types, [`wrapping_div`], [`wrapping_rem`],
4923 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
4924 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
4925 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
4926 type.. It is illegal for the default arithmetic operations in Rust
4927 to overflow; the desire to wrap must be explicit.
4928 * The `{:#?}` formatting specifier [displays the alternate,
4929 pretty-printed][debugfmt] form of the `Debug` formatter. This
4930 feature was actually introduced prior to 1.0 with little
4932 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
4933 for writing data to formatted strings, similar to [`io::Write`].
4934 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
4935 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
4936 are used by code generators to emit implementations of [`Debug`].
4937 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
4938 methods that convert case, following Unicode case mapping.
4939 * It is now easier to handle poisoned locks. The [`PoisonError`]
4940 type, returned by failing lock operations, exposes `into_inner`,
4941 `get_ref`, and `get_mut`, which all give access to the inner lock
4942 guard, and allow the poisoned lock to continue to operate. The
4943 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
4944 poisoned lock without attempting to take the lock.
4945 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
4946 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
4947 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
4948 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
4950 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
4956 * `rustc` employs smarter heuristics for guessing at [typos].
4957 * `rustc` emits more efficient code for [no-op conversions between
4958 unsafe pointers][nop].
4959 * Fat pointers are now [passed in pairs of immediate arguments][fat],
4960 resulting in faster compile times and smaller code.
4962 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
4963 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4964 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
4965 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
4966 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
4967 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
4968 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
4969 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
4970 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
4971 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
4972 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
4973 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
4974 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
4975 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
4976 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
4977 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
4978 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4979 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
4980 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
4981 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
4982 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
4983 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
4984 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
4985 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
4986 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
4987 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4988 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
4989 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
4990 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
4991 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
4992 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
4993 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
4994 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
4995 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4996 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4997 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
4998 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
4999 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
5000 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
5001 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
5002 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
5003 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
5004 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
5005 [align]: https://github.com/rust-lang/rust/pull/25646
5006 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
5007 [typos]: https://github.com/rust-lang/rust/pull/26087
5008 [nop]: https://github.com/rust-lang/rust/pull/26336
5009 [fat]: https://github.com/rust-lang/rust/pull/26411
5010 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
5011 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
5012 [packed]: https://github.com/rust-lang/rust/pull/25541
5013 [ad]: https://github.com/rust-lang/rust/pull/27382
5014 [win]: https://github.com/rust-lang/rust/pull/25350
5016 Version 1.1.0 (2015-06-25)
5017 =========================
5019 * ~850 changes, numerous bugfixes
5024 * The [`std::fs` module has been expanded][fs] to expand the set of
5025 functionality exposed:
5026 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
5027 don't incur a syscall on some platforms.
5028 * A `symlink_metadata` function has been added.
5029 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
5030 access to all underlying information.
5031 * The compiler now contains extended explanations of many errors. When an error
5032 with an explanation occurs the compiler suggests using the `--explain` flag
5033 to read the explanation. Error explanations are also [available online][err-index].
5034 * Thanks to multiple [improvements][sk] to [type checking][pre], as
5035 well as other work, the time to bootstrap the compiler decreased by
5041 * The [`str::split_whitespace`] method splits a string on unicode
5042 whitespace boundaries.
5043 * On both Windows and Unix, new extension traits provide conversion of
5044 I/O types to and from the underlying system handles. On Unix, these
5045 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
5046 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
5047 `TcpListener`, and `UpdSocket`. Further implementations for
5048 `std::process` will be stabilized later.
5049 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
5050 Windows, symlinks can be created with
5051 `std::os::windows::symlink_dir` and
5052 `std::os::windows::symlink_file`.
5053 * The `mpsc::Receiver` type can now be converted into an iterator with
5054 `into_iter` on the [`IntoIterator`] trait.
5055 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
5056 implementation of the [`From`] trait.
5057 * The `Debug` implementation for `RangeFull` [creates output that is
5058 more consistent with other implementations][rf].
5059 * [`Debug` is implemented for `File`][file].
5060 * The `Default` implementation for `Arc` [no longer requires `Sync +
5062 * [The `Iterator` methods `count`, `nth`, and `last` have been
5063 overridden for slices to have O(1) performance instead of O(n)][si].
5064 * Incorrect handling of paths on Windows has been improved in both the
5065 compiler and the standard library.
5066 * [`AtomicPtr` gained a `Default` implementation][ap].
5067 * In accordance with Rust's policy on arithmetic overflow `abs` now
5068 [panics on overflow when debug assertions are enabled][abs].
5069 * The [`Cloned`] iterator, which was accidentally left unstable for
5070 1.0 [has been stabilized][c].
5071 * The [`Incoming`] iterator, which iterates over incoming TCP
5072 connections, and which was accidentally unnamable in 1.0, [is now
5073 properly exported][inc].
5074 * [`BinaryHeap`] no longer corrupts itself [when functions called by
5075 `sift_up` or `sift_down` panic][bh].
5076 * The [`split_off`] method of `LinkedList` [no longer corrupts
5077 the list in certain scenarios][ll].
5082 * Type checking performance [has improved notably][sk] with
5083 [multiple improvements][pre].
5084 * The compiler [suggests code changes][ch] for more errors.
5085 * rustc and it's build system have experimental support for [building
5086 toolchains against MUSL][m] instead of glibc on Linux.
5087 * The compiler defines the `target_env` cfg value, which is used for
5088 distinguishing toolchains that are otherwise for the same
5089 platform. Presently this is set to `gnu` for common GNU Linux
5090 targets and for MinGW targets, and `musl` for MUSL Linux targets.
5091 * The [`cargo rustc`][crc] command invokes a build with custom flags
5093 * [Android executables are always position independent][pie].
5094 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
5097 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
5098 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
5099 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
5100 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
5101 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
5102 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
5103 [rf]: https://github.com/rust-lang/rust/pull/24491
5104 [err-index]: https://doc.rust-lang.org/error-index.html
5105 [sk]: https://github.com/rust-lang/rust/pull/24615
5106 [pre]: https://github.com/rust-lang/rust/pull/25323
5107 [file]: https://github.com/rust-lang/rust/pull/24598
5108 [ch]: https://github.com/rust-lang/rust/pull/24683
5109 [arc]: https://github.com/rust-lang/rust/pull/24695
5110 [si]: https://github.com/rust-lang/rust/pull/24701
5111 [ap]: https://github.com/rust-lang/rust/pull/24834
5112 [m]: https://github.com/rust-lang/rust/pull/24777
5113 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
5114 [crc]: https://github.com/rust-lang/cargo/pull/1568
5115 [pie]: https://github.com/rust-lang/rust/pull/24953
5116 [abs]: https://github.com/rust-lang/rust/pull/25441
5117 [c]: https://github.com/rust-lang/rust/pull/25496
5118 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
5119 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
5120 [inc]: https://github.com/rust-lang/rust/pull/25522
5121 [bh]: https://github.com/rust-lang/rust/pull/25856
5122 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
5123 [ll]: https://github.com/rust-lang/rust/pull/26022
5124 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
5125 [drop]: https://github.com/rust-lang/rust/pull/24935
5127 Version 1.0.0 (2015-05-15)
5128 ========================
5130 * ~1500 changes, numerous bugfixes
5135 * The vast majority of the standard library is now `#[stable]`. It is
5136 no longer possible to use unstable features with a stable build of
5138 * Many popular crates on [crates.io] now work on the stable release
5140 * Arithmetic on basic integer types now [checks for overflow in debug
5146 * Several [restrictions have been added to trait coherence][coh] in
5147 order to make it easier for upstream authors to change traits
5148 without breaking downstream code.
5149 * Digits of binary and octal literals are [lexed more eagerly][lex] to
5150 improve error messages and macro behavior. For example, `0b1234` is
5151 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
5152 * Trait bounds [are always invariant][inv], eliminating the need for
5153 the `PhantomFn` and `MarkerTrait` lang items, which have been
5155 * ["-" is no longer a valid character in crate names][cr], the `extern crate
5156 "foo" as bar` syntax has been replaced with `extern crate foo as
5157 bar`, and Cargo now automatically translates "-" in *package* names
5158 to underscore for the crate name.
5159 * [Lifetime shadowing is an error][lt].
5160 * [`Send` no longer implies `'static`][send-rfc].
5161 * [UFCS now supports trait-less associated paths][moar-ufcs] like
5162 `MyType::default()`.
5163 * Primitive types [now have inherent methods][prim-inherent],
5164 obviating the need for extension traits like `SliceExt`.
5165 * Methods with `Self: Sized` in their `where` clause are [considered
5166 object-safe][self-sized], allowing many extension traits like
5167 `IteratorExt` to be merged into the traits they extended.
5168 * You can now [refer to associated types][assoc-where] whose
5169 corresponding trait bounds appear only in a `where` clause.
5170 * The final bits of [OIBIT landed][oibit-final], meaning that traits
5171 like `Send` and `Sync` are now library-defined.
5172 * A [Reflect trait][reflect] was introduced, which means that
5173 downcasting via the `Any` trait is effectively limited to concrete
5174 types. This helps retain the potentially-important "parametricity"
5175 property: generic code cannot behave differently for different type
5176 arguments except in minor ways.
5177 * The `unsafe_destructor` feature is now deprecated in favor of the
5178 [new `dropck`][dropck]. This change is a major reduction in unsafe
5184 * The `thread_local` module [has been renamed to `std::thread`][th].
5185 * The methods of `IteratorExt` [have been moved to the `Iterator`
5187 * Several traits that implement Rust's conventions for type
5188 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
5189 [centralized in the `std::convert` module][con].
5190 * The `FromError` trait [was removed in favor of `From`][fe].
5191 * The basic sleep function [has moved to
5192 `std::thread::sleep_ms`][slp].
5193 * The `splitn` function now takes an `n` parameter that represents the
5194 number of items yielded by the returned iterator [instead of the
5195 number of 'splits'][spl].
5196 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
5197 * [Derived implementations of `PartialOrd` now order enums according
5198 to their explicitly-assigned discriminants][po].
5199 * [Methods for searching strings are generic over `Pattern`s][pat],
5200 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
5202 * [In method resolution, object methods are resolved before inherent
5204 * [`String::from_str` has been deprecated in favor of the `From` impl,
5205 `String::from`][sf].
5206 * [`io::Error` implements `Sync`][ios].
5207 * [The `words` method on `&str` has been replaced with
5208 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
5210 * The new path and IO modules are complete and `#[stable]`. This
5211 was the major library focus for this cycle.
5212 * The path API was [revised][path-normalize] to normalize `.`,
5213 adjusting the tradeoffs in favor of the most common usage.
5214 * A large number of remaining APIs in `std` were also stabilized
5215 during this cycle; about 75% of the non-deprecated API surface
5217 * The new [string pattern API][string-pattern] landed, which makes
5218 the string slice API much more internally consistent and flexible.
5219 * A new set of [generic conversion traits][conversion] replaced
5220 many existing ad hoc traits.
5221 * Generic numeric traits were [completely removed][num-traits]. This
5222 was made possible thanks to inherent methods for primitive types,
5223 and the removal gives maximal flexibility for designing a numeric
5224 hierarchy in the future.
5225 * The `Fn` traits are now related via [inheritance][fn-inherit]
5226 and provide ergonomic [blanket implementations][fn-blanket].
5227 * The `Index` and `IndexMut` traits were changed to
5228 [take the index by value][index-value], enabling code like
5229 `hash_map["string"]` to work.
5230 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
5231 `Copy` data is known to be `Clone` as well.
5236 * Many errors now have extended explanations that can be accessed with
5237 the `--explain` flag to `rustc`.
5238 * Many new examples have been added to the standard library
5240 * rustdoc has received a number of improvements focused on completion
5242 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
5243 * Much headway was made on ecosystem-wide CI, making it possible
5244 to [compare builds for breakage][ci-compare].
5247 [crates.io]: http://crates.io
5248 [clo]: https://github.com/rust-lang/rust/pull/24034
5249 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
5250 [con]: https://github.com/rust-lang/rust/pull/23875
5251 [cr]: https://github.com/rust-lang/rust/pull/23419
5252 [fe]: https://github.com/rust-lang/rust/pull/23879
5253 [ie]: https://github.com/rust-lang/rust/pull/23300
5254 [inv]: https://github.com/rust-lang/rust/pull/23938
5255 [ios]: https://github.com/rust-lang/rust/pull/24133
5256 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
5257 [lt]: https://github.com/rust-lang/rust/pull/24057
5258 [meth]: https://github.com/rust-lang/rust/pull/24056
5259 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
5260 [po]: https://github.com/rust-lang/rust/pull/24270
5261 [sf]: https://github.com/rust-lang/rust/pull/24517
5262 [slp]: https://github.com/rust-lang/rust/pull/23949
5263 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
5264 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
5265 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
5266 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
5267 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
5268 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
5269 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
5270 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
5271 [self-sized]: https://github.com/rust-lang/rust/pull/22301
5272 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
5273 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
5274 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
5275 [reflect]: https://github.com/rust-lang/rust/pull/23712
5276 [conversion]: https://github.com/rust-lang/rfcs/pull/529
5277 [num-traits]: https://github.com/rust-lang/rust/pull/23549
5278 [index-value]: https://github.com/rust-lang/rust/pull/23601
5279 [dropck]: https://github.com/rust-lang/rfcs/pull/769
5280 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
5281 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
5282 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
5283 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
5284 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
5287 Version 1.0.0-alpha.2 (2015-02-20)
5288 =====================================
5290 * ~1300 changes, numerous bugfixes
5294 * The various I/O modules were [overhauled][io-rfc] to reduce
5295 unnecessary abstractions and provide better interoperation with
5296 the underlying platform. The old `io` module remains temporarily
5298 * The standard library now [participates in feature gating][feat],
5299 so use of unstable libraries now requires a `#![feature(...)]`
5300 attribute. The impact of this change is [described on the
5301 forum][feat-forum]. [RFC][feat-rfc].
5305 * `for` loops [now operate on the `IntoIterator` trait][into],
5306 which eliminates the need to call `.iter()`, etc. to iterate
5307 over collections. There are some new subtleties to remember
5308 though regarding what sort of iterators various types yield, in
5309 particular that `for foo in bar { }` yields values from a move
5310 iterator, destroying the original collection. [RFC][into-rfc].
5311 * Objects now have [default lifetime bounds][obj], so you don't
5312 have to write `Box<Trait+'static>` when you don't care about
5313 storing references. [RFC][obj-rfc].
5314 * In types that implement `Drop`, [lifetimes must outlive the
5315 value][drop]. This will soon make it possible to safely
5316 implement `Drop` for types where `#[unsafe_destructor]` is now
5317 required. Read the [gorgeous RFC][drop-rfc] for details.
5318 * The fully qualified <T as Trait>::X syntax lets you set the Self
5319 type for a trait method or associated type. [RFC][ufcs-rfc].
5320 * References to types that implement `Deref<U>` now [automatically
5321 coerce to references][deref] to the dereferenced type `U`,
5322 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
5323 should eliminate many unsightly uses of `&*`, as when converting
5324 from references to vectors into references to
5325 slices. [RFC][deref-rfc].
5326 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
5327 `|:|`) is obsolete and closure kind is inferred from context.
5328 * [`Self` is a keyword][Self].
5332 * The `Show` and `String` formatting traits [have been
5333 renamed][fmt] to `Debug` and `Display` to more clearly reflect
5334 their related purposes. Automatically getting a string
5335 conversion to use with `format!("{:?}", something_to_debug)` is
5336 now written `#[derive(Debug)]`.
5337 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
5338 OsStr}`, provide strings in platform-specific encodings for easier
5339 interop with system APIs. [RFC][osstr-rfc].
5340 * The `boxed::into_raw` and `Box::from_raw` functions [convert
5341 between `Box<T>` and `*mut T`][boxraw], a common pattern for
5342 creating raw pointers.
5346 * Certain long error messages of the form 'expected foo found bar'
5347 are now [split neatly across multiple
5348 lines][multiline]. Examples in the PR.
5349 * On Unix Rust can be [uninstalled][un] by running
5350 `/usr/local/lib/rustlib/uninstall.sh`.
5351 * The `#[rustc_on_unimplemented]` attribute, requiring the
5352 'on_unimplemented' feature, lets rustc [display custom error
5353 messages when a trait is expected to be implemented for a type
5358 * Rust is tested against a [LALR grammar][lalr], which parses
5359 almost all the Rust files that rustc does.
5361 [boxraw]: https://github.com/rust-lang/rust/pull/21318
5362 [close]: https://github.com/rust-lang/rust/pull/21843
5363 [deref]: https://github.com/rust-lang/rust/pull/21351
5364 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
5365 [drop]: https://github.com/rust-lang/rust/pull/21972
5366 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
5367 [feat]: https://github.com/rust-lang/rust/pull/21248
5368 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
5369 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
5370 [fmt]: https://github.com/rust-lang/rust/pull/21457
5371 [into]: https://github.com/rust-lang/rust/pull/20790
5372 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
5373 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5374 [lalr]: https://github.com/rust-lang/rust/pull/21452
5375 [multiline]: https://github.com/rust-lang/rust/pull/19870
5376 [obj]: https://github.com/rust-lang/rust/pull/22230
5377 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
5378 [onun]: https://github.com/rust-lang/rust/pull/20889
5379 [osstr]: https://github.com/rust-lang/rust/pull/21488
5380 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5381 [Self]: https://github.com/rust-lang/rust/pull/22158
5382 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
5383 [un]: https://github.com/rust-lang/rust/pull/22256
5386 Version 1.0.0-alpha (2015-01-09)
5387 ==================================
5389 * ~2400 changes, numerous bugfixes
5393 * The language itself is considered feature complete for 1.0,
5394 though there will be many usability improvements and bugfixes
5395 before the final release.
5396 * Nearly 50% of the public API surface of the standard library has
5397 been declared 'stable'. Those interfaces are unlikely to change
5399 * The long-running debate over integer types has been
5400 [settled][ints]: Rust will ship with types named `isize` and
5401 `usize`, rather than `int` and `uint`, for pointer-sized
5402 integers. Guidelines will be rolled out during the alpha cycle.
5403 * Most crates that are not `std` have been moved out of the Rust
5404 distribution into the Cargo ecosystem so they can evolve
5405 separately and don't need to be stabilized as quickly, including
5406 'time', 'getopts', 'num', 'regex', and 'term'.
5407 * Documentation continues to be expanded with more API coverage, more
5408 examples, and more in-depth explanations. The guides have been
5409 consolidated into [The Rust Programming Language][trpl].
5410 * "[Rust By Example][rbe]" is now maintained by the Rust team.
5411 * All official Rust binary installers now come with [Cargo], the
5412 Rust package manager.
5416 * Closures have been [completely redesigned][unboxed] to be
5417 implemented in terms of traits, can now be used as generic type
5418 bounds and thus monomorphized and inlined, or via an opaque
5419 pointer (boxed) as in the old system. The new system is often
5420 referred to as 'unboxed' closures.
5421 * Traits now support [associated types][assoc], allowing families
5422 of related types to be defined together and used generically in
5424 * Enum variants are [namespaced by their type names][enum].
5425 * [`where` clauses][where] provide a more versatile and attractive
5426 syntax for specifying generic bounds, though the previous syntax
5428 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
5430 * Rust [no longer has a runtime][rt] of any description, and only
5431 supports OS threads, not green threads.
5432 * At long last, Rust has been overhauled for 'dynamically-sized
5433 types' ([DST]), which integrates 'fat pointers' (object types,
5434 arrays, and `str`) more deeply into the type system, making it
5436 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
5437 `..j` that produce range types and which, when combined with the
5438 `Index` operator and multidispatch, leads to a convenient slice
5440 * The new range syntax revealed an ambiguity in the fixed-length
5441 array syntax, so now fixed length arrays [are written `[T;
5443 * The `Copy` trait is no longer implemented automatically. Unsafe
5444 pointers no longer implement `Sync` and `Send` so types
5445 containing them don't automatically either. `Sync` and `Send`
5446 are now 'unsafe traits' so one can "forcibly" implement them via
5447 `unsafe impl` if a type confirms to the requirements for them
5448 even though the internals do not (e.g. structs containing unsafe
5449 pointers like `Arc`). These changes are intended to prevent some
5450 footguns and are collectively known as [opt-in built-in
5451 traits][oibit] (though `Sync` and `Send` will soon become pure
5452 library types unknown to the compiler).
5453 * Operator traits now take their operands [by value][ops], and
5454 comparison traits can use multidispatch to compare one type
5455 against multiple other types, allowing e.g. `String` to be
5456 compared with `&str`.
5457 * `if let` and `while let` are no longer feature-gated.
5458 * Rust has adopted a more [uniform syntax for escaping unicode
5459 characters][unicode].
5460 * `macro_rules!` [has been declared stable][mac]. Though it is a
5461 flawed system it is sufficiently popular that it must be usable
5462 for 1.0. Effort has gone into [future-proofing][mac-future] it
5463 in ways that will allow other macro systems to be developed in
5464 parallel, and won't otherwise impact the evolution of the
5466 * The prelude has been [pared back significantly][prelude] such
5467 that it is the minimum necessary to support the most pervasive
5468 code patterns, and through [generalized where clauses][where]
5469 many of the prelude extension traits have been consolidated.
5470 * Rust's rudimentary reflection [has been removed][refl], as it
5471 incurred too much code generation for little benefit.
5472 * [Struct variants][structvars] are no longer feature-gated.
5473 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
5474 known as 'higher-ranked trait bounds', this crucially allows
5475 unboxed closures to work.
5476 * Macros invocations surrounded by parens or square brackets and
5477 not terminated by a semicolon are [parsed as
5478 expressions][macros], which makes expressions like `vec![1i32,
5479 2, 3].len()` work as expected.
5480 * Trait objects now implement their traits automatically, and
5481 traits that can be coerced to objects now must be [object
5483 * Automatically deriving traits is now done with `#[derive(...)]`
5484 not `#[deriving(...)]` for [consistency with other naming
5485 conventions][derive].
5486 * Importing the containing module or enum at the same time as
5487 items or variants they contain is [now done with `self` instead
5488 of `mod`][self], as in use `foo::{self, bar}`
5489 * Glob imports are no longer feature-gated.
5490 * The `box` operator and `box` patterns have been feature-gated
5491 pending a redesign. For now unique boxes should be allocated
5492 like other containers, with `Box::new`.
5496 * A [series][coll1] of [efforts][coll2] to establish
5497 [conventions][coll3] for collections types has resulted in API
5498 improvements throughout the standard library.
5499 * New [APIs for error handling][err] provide ergonomic interop
5500 between error types, and [new conventions][err-conv] describe
5501 more clearly the recommended error handling strategies in Rust.
5502 * The `fail!` macro has been renamed to [`panic!`][panic] so that
5503 it is easier to discuss failure in the context of error handling
5504 without making clarifications as to whether you are referring to
5505 the 'fail' macro or failure more generally.
5506 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
5507 syscall when available.
5508 * The 'serialize' crate has been renamed 'rustc-serialize' and
5509 moved out of the distribution to Cargo. Although it is widely
5510 used now, it is expected to be superseded in the near future.
5511 * The `Show` formatter, typically implemented with
5512 `#[derive(Show)]` is [now requested with the `{:?}`
5513 specifier][show] and is intended for use by all types, for uses
5514 such as `println!` debugging. The new `String` formatter must be
5515 implemented by hand, uses the `{}` specifier, and is intended
5516 for full-fidelity conversions of things that can logically be
5517 represented as strings.
5521 * [Flexible target specification][flex] allows rustc's code
5522 generation to be configured to support otherwise-unsupported
5524 * Rust comes with rust-gdb and rust-lldb scripts that launch their
5525 respective debuggers with Rust-appropriate pretty-printing.
5526 * The Windows installation of Rust is distributed with the
5527 MinGW components currently required to link binaries on that
5532 * Nullable enum optimizations have been extended to more types so
5533 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
5534 space than the inner types themselves.
5535 * Work has begun on supporting AArch64.
5537 [Cargo]: https://crates.io
5538 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
5539 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
5540 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
5541 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
5542 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
5543 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
5544 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
5545 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
5546 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
5547 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
5548 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
5549 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
5550 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
5551 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
5552 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
5553 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
5554 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
5555 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
5556 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
5557 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
5558 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
5559 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
5560 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
5561 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
5562 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
5563 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
5564 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
5565 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
5566 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
5567 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
5568 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
5569 [trpl]: https://doc.rust-lang.org/book/index.html
5570 [rbe]: http://rustbyexample.com/
5573 Version 0.12.0 (2014-10-09)
5574 =============================
5576 * ~1900 changes, numerous bugfixes
5580 * The introductory documentation (now called The Rust Guide) has
5581 been completely rewritten, as have a number of supplementary
5583 * Rust's package manager, Cargo, continues to improve and is
5584 sometimes considered to be quite awesome.
5585 * Many API's in `std` have been reviewed and updated for
5586 consistency with the in-development Rust coding
5587 guidelines. The standard library documentation tracks
5588 stabilization progress.
5589 * Minor libraries have been moved out-of-tree to the rust-lang org
5590 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
5591 be installed with Cargo.
5592 * Lifetime elision allows lifetime annotations to be left off of
5593 function declarations in many common scenarios.
5594 * Rust now works on 64-bit Windows.
5597 * Indexing can be overloaded with the `Index` and `IndexMut`
5599 * The `if let` construct takes a branch only if the `let` pattern
5600 matches, currently behind the 'if_let' feature gate.
5601 * 'where clauses', a more flexible syntax for specifying trait
5602 bounds that is more aesthetic, have been added for traits and
5603 free functions. Where clauses will in the future make it
5604 possible to constrain associated types, which would be
5605 impossible with the existing syntax.
5606 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
5607 the 'slicing_syntax' feature gate, and can be overloaded with
5608 the `Slice` or `SliceMut` traits.
5609 * The syntax for matching of sub-slices has been changed to use a
5610 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
5611 consistency with other uses of `..` and to future-proof
5612 potential additional uses of the syntax.
5613 * The syntax for matching inclusive ranges in patterns has changed
5614 from `0..3` to `0...4` to be consistent with the exclusive range
5616 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
5617 c]`) has been put behind the 'advanced_slice_patterns' feature
5618 gate and may be removed in the future.
5619 * Components of tuples and tuple structs can be extracted using
5620 the `value.0` syntax, currently behind the `tuple_indexing`
5622 * The `#[crate_id]` attribute is no longer supported; versioning
5623 is handled by the package manager.
5624 * Renaming crate imports are now written `extern crate foo as bar`
5625 instead of `extern crate bar = foo`.
5626 * Renaming use statements are now written `use foo as bar` instead
5628 * `let` and `match` bindings and argument names in macros are now
5630 * The new, more efficient, closure types ('unboxed closures') have
5631 been added under a feature gate, 'unboxed_closures'. These will
5632 soon replace the existing closure types, once higher-ranked
5633 trait lifetimes are added to the language.
5634 * `move` has been added as a keyword, for indicating closures
5635 that capture by value.
5636 * Mutation and assignment is no longer allowed in pattern guards.
5637 * Generic structs and enums can now have trait bounds.
5638 * The `Share` trait is now called `Sync` to free up the term
5639 'shared' to refer to 'shared reference' (the default reference
5641 * Dynamically-sized types have been mostly implemented,
5642 unifying the behavior of fat-pointer types with the rest of the
5644 * As part of dynamically-sized types, the `Sized` trait has been
5645 introduced, which qualifying types implement by default, and
5646 which type parameters expect by default. To specify that a type
5647 parameter does not need to be sized, write `<Sized? T>`. Most
5648 types are `Sized`, notable exceptions being unsized arrays
5649 (`[T]`) and trait types.
5650 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
5651 * Lifetime bounds can now be applied to type parameters and object
5653 * The old, reference counted GC type, `Gc<T>` which was once
5654 denoted by the `@` sigil, has finally been removed. GC will be
5655 revisited in the future.
5658 * Library documentation has been improved for a number of modules.
5659 * Bit-vectors, collections::bitv has been modernized.
5660 * The url crate is deprecated in favor of
5661 http://github.com/servo/rust-url, which can be installed with
5663 * Most I/O stream types can be cloned and subsequently closed from
5665 * A `std::time::Duration` type has been added for use in I/O
5666 methods that rely on timers, as well as in the 'time' crate's
5667 `Timespec` arithmetic.
5668 * The runtime I/O abstraction layer that enabled the green thread
5669 scheduler to do non-thread-blocking I/O has been removed, along
5670 with the libuv-based implementation employed by the green thread
5671 scheduler. This will greatly simplify the future I/O work.
5672 * `collections::btree` has been rewritten to have a more
5673 idiomatic and efficient design.
5676 * rustdoc output now indicates the stability levels of API's.
5677 * The `--crate-name` flag can specify the name of the crate
5678 being compiled, like `#[crate_name]`.
5679 * The `-C metadata` specifies additional metadata to hash into
5680 symbol names, and `-C extra-filename` specifies additional
5681 information to put into the output filename, for use by the
5682 package manager for versioning.
5683 * debug info generation has continued to improve and should be
5684 more reliable under both gdb and lldb.
5685 * rustc has experimental support for compiling in parallel
5686 using the `-C codegen-units` flag.
5687 * rustc no longer encodes rpath information into binaries by
5691 * Stack usage has been optimized with LLVM lifetime annotations.
5692 * Official Rust binaries on Linux are more compatible with older
5693 kernels and distributions, built on CentOS 5.10.
5696 Version 0.11.0 (2014-07-02)
5697 ==========================
5699 * ~1700 changes, numerous bugfixes
5702 * ~[T] has been removed from the language. This type is superseded by
5704 * ~str has been removed from the language. This type is superseded by
5706 * ~T has been removed from the language. This type is superseded by the
5708 * @T has been removed from the language. This type is superseded by the
5709 standard library's std::gc::Gc<T> type.
5710 * Struct fields are now all private by default.
5711 * Vector indices and shift amounts are both required to be a `uint`
5712 instead of any integral type.
5713 * Byte character, byte string, and raw byte string literals are now all
5714 supported by prefixing the normal literal with a `b`.
5715 * Multiple ABIs are no longer allowed in an ABI string
5716 * The syntax for lifetimes on closures/procedures has been tweaked
5717 slightly: `<'a>|A, B|: 'b + K -> T`
5718 * Floating point modulus has been removed from the language; however it
5719 is still provided by a library implementation.
5720 * Private enum variants are now disallowed.
5721 * The `priv` keyword has been removed from the language.
5722 * A closure can no longer be invoked through a &-pointer.
5723 * The `use foo, bar, baz;` syntax has been removed from the language.
5724 * The transmute intrinsic no longer works on type parameters.
5725 * Statics now allow blocks/items in their definition.
5726 * Trait bounds are separated from objects with + instead of : now.
5727 * Objects can no longer be read while they are mutably borrowed.
5728 * The address of a static is now marked as insignificant unless the
5729 #[inline(never)] attribute is placed it.
5730 * The #[unsafe_destructor] attribute is now behind a feature gate.
5731 * Struct literals are no longer allowed in ambiguous positions such as
5732 if, while, match, and for..in.
5733 * Declaration of lang items and intrinsics are now feature-gated by
5735 * Integral literals no longer default to `int`, and floating point
5736 literals no longer default to `f64`. Literals must be suffixed with an
5737 appropriate type if inference cannot determine the type of the
5739 * The Box<T> type is no longer implicitly borrowed to &mut T.
5740 * Procedures are now required to not capture borrowed references.
5743 * The standard library is now a "facade" over a number of underlying
5744 libraries. This means that development on the standard library should
5745 be speedier due to smaller crates, as well as a clearer line between
5747 * A new library, libcore, lives under the standard library's facade
5748 which is Rust's "0-assumption" library, suitable for embedded and
5749 kernel development for example.
5750 * A regex crate has been added to the standard distribution. This crate
5751 includes statically compiled regular expressions.
5752 * The unwrap/unwrap_err methods on Result require a Show bound for
5753 better error messages.
5754 * The return types of the std::comm primitives have been centralized
5755 around the Result type.
5756 * A number of I/O primitives have gained the ability to time out their
5758 * A number of I/O primitives have gained the ability to close their
5759 reading/writing halves to cancel pending operations.
5760 * Reverse iterator methods have been removed in favor of `rev()` on
5761 their forward-iteration counterparts.
5762 * A bitflags! macro has been added to enable easy interop with C and
5763 management of bit flags.
5764 * A debug_assert! macro is now provided which is disabled when
5765 `--cfg ndebug` is passed to the compiler.
5766 * A graphviz crate has been added for creating .dot files.
5767 * The std::cast module has been migrated into std::mem.
5768 * The std::local_data api has been migrated from freestanding functions
5769 to being based on methods.
5770 * The Pod trait has been renamed to Copy.
5771 * jemalloc has been added as the default allocator for types.
5772 * The API for allocating memory has been changed to use proper alignment
5773 and sized deallocation
5774 * Connecting a TcpStream or binding a TcpListener is now based on a
5775 string address and a u16 port. This allows connecting to a hostname as
5777 * The Reader trait now contains a core method, read_at_least(), which
5778 correctly handles many repeated 0-length reads.
5779 * The process-spawning API is now centered around a builder-style
5781 * The :? printing qualifier has been moved from the standard library to
5782 an external libdebug crate.
5783 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
5784 have been renamed to Eq/Ord.
5785 * The select/plural methods have been removed from format!. The escapes
5786 for { and } have also changed from \{ and \} to {{ and }},
5788 * The TaskBuilder API has been re-worked to be a true builder, and
5789 extension traits for spawning native/green tasks have been added.
5792 * All breaking changes to the language or libraries now have their
5793 commit message annotated with `[breaking-change]` to allow for easy
5794 discovery of breaking changes.
5795 * The compiler will now try to suggest how to annotate lifetimes if a
5796 lifetime-related error occurs.
5797 * Debug info continues to be improved greatly with general bug fixes and
5798 better support for situations like link time optimization (LTO).
5799 * Usage of syntax extensions when cross-compiling has been fixed.
5800 * Functionality equivalent to GCC & Clang's -ffunction-sections,
5801 -fdata-sections and --gc-sections has been enabled by default
5802 * The compiler is now stricter about where it will load module files
5803 from when a module is declared via `mod foo;`.
5804 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
5805 Syntax extensions are now discovered via a "plugin registrar" type
5806 which will be extended in the future to other various plugins.
5807 * Lints have been restructured to allow for dynamically loadable lints.
5808 * A number of rustdoc improvements:
5809 * The HTML output has been visually redesigned.
5810 * Markdown is now powered by hoedown instead of sundown.
5811 * Searching heuristics have been greatly improved.
5812 * The search index has been reduced in size by a great amount.
5813 * Cross-crate documentation via `pub use` has been greatly improved.
5814 * Primitive types are now hyperlinked and documented.
5815 * Documentation has been moved from static.rust-lang.org/doc to
5817 * A new sandbox, play.rust-lang.org, is available for running and
5818 sharing rust code examples on-line.
5819 * Unused attributes are now more robustly warned about.
5820 * The dead_code lint now warns about unused struct fields.
5821 * Cross-compiling to iOS is now supported.
5822 * Cross-compiling to mipsel is now supported.
5823 * Stability attributes are now inherited by default and no longer apply
5824 to intra-crate usage, only inter-crate usage.
5825 * Error message related to non-exhaustive match expressions have been
5829 Version 0.10 (2014-04-03)
5830 =========================
5832 * ~1500 changes, numerous bugfixes
5835 * A new RFC process is now in place for modifying the language.
5836 * Patterns with `@`-pointers have been removed from the language.
5837 * Patterns with unique vectors (`~[T]`) have been removed from the
5839 * Patterns with unique strings (`~str`) have been removed from the
5841 * `@str` has been removed from the language.
5842 * `@[T]` has been removed from the language.
5843 * `@self` has been removed from the language.
5844 * `@Trait` has been removed from the language.
5845 * Headers on `~` allocations which contain `@` boxes inside the type for
5846 reference counting have been removed.
5847 * The semantics around the lifetimes of temporary expressions have changed,
5848 see #3511 and #11585 for more information.
5849 * Cross-crate syntax extensions are now possible, but feature gated. See
5850 #11151 for more information. This includes both `macro_rules!` macros as
5851 well as syntax extensions such as `format!`.
5852 * New lint modes have been added, and older ones have been turned on to be
5854 * Unnecessary parentheses
5857 * Uppercase variables
5858 * Publicly visible private types
5859 * `#[deriving]` with raw pointers
5860 * Unsafe functions can no longer be coerced to closures.
5861 * Various obscure macros such as `log_syntax!` are now behind feature gates.
5862 * The `#[simd]` attribute is now behind a feature gate.
5863 * Visibility is no longer allowed on `extern crate` statements, and
5864 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
5865 * Trailing commas are now allowed in argument lists and tuple patterns.
5866 * The `do` keyword has been removed, it is now a reserved keyword.
5867 * Default type parameters have been implemented, but are feature gated.
5868 * Borrowed variables through captures in closures are now considered soundly.
5869 * `extern mod` is now `extern crate`
5870 * The `Freeze` trait has been removed.
5871 * The `Share` trait has been added for types that can be shared among
5873 * Labels in macros are now hygienic.
5874 * Expression/statement macro invocations can be delimited with `{}` now.
5875 * Treatment of types allowed in `static mut` locations has been tweaked.
5876 * The `*` and `.` operators are now overloadable through the `Deref` and
5878 * `~Trait` and `proc` no longer have `Send` bounds by default.
5879 * Partial type hints are now supported with the `_` type marker.
5880 * An `Unsafe` type was introduced for interior mutability. It is now
5881 considered undefined to transmute from `&T` to `&mut T` without using the
5883 * The #[linkage] attribute was implemented for extern statics/functions.
5884 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
5885 * `Pod` was renamed to `Copy`.
5888 * The `libextra` library has been removed. It has now been decomposed into
5889 component libraries with smaller and more focused nuggets of
5890 functionality. The full list of libraries can be found on the
5891 documentation index page.
5892 * std: `std::condition` has been removed. All I/O errors are now propagated
5893 through the `Result` type. In order to assist with error handling, a
5894 `try!` macro for unwrapping errors with an early return and a lint for
5895 unused results has been added. See #12039 for more information.
5896 * std: The `vec` module has been renamed to `slice`.
5897 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
5898 This will become the only growable vector in the future.
5899 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
5900 are now found at `std::io::BufferedReader` instead of
5901 `std::io::buffered::BufferedReader`.
5902 * std: `print` and `println` are no longer in the prelude, the `print!` and
5903 `println!` macros are intended to be used instead.
5904 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
5905 attempts to statically prevent cycles.
5906 * std: The standard distribution is adopting the policy of pushing failure
5907 to the user rather than failing in libraries. Many functions (such as
5908 `slice::last()`) now return `Option<T>` instead of `T` + failing.
5909 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
5910 deriving mode: `#[deriving(Show)]`.
5911 * std: `ToStr` is now implemented for all types implementing `Show`.
5912 * std: The formatting trait methods now take `&self` instead of `&T`
5913 * std: The `invert()` method on iterators has been renamed to `rev()`
5914 * std: `std::num` has seen a reduction in the genericity of its traits,
5915 consolidating functionality into a few core traits.
5916 * std: Backtraces are now printed on task failure if the environment
5917 variable `RUST_BACKTRACE` is present.
5918 * std: Naming conventions for iterators have been standardized. More details
5919 can be found on the wiki's style guide.
5920 * std: `eof()` has been removed from the `Reader` trait. Specific types may
5921 still implement the function.
5922 * std: Networking types are now cloneable to allow simultaneous reads/writes.
5923 * std: `assert_approx_eq!` has been removed
5924 * std: The `e` and `E` formatting specifiers for floats have been added to
5925 print them in exponential notation.
5926 * std: The `Times` trait has been removed
5927 * std: Indications of variance and opting out of builtin bounds is done
5928 through marker types in `std::kinds::marker` now
5929 * std: `hash` has been rewritten, `IterBytes` has been removed, and
5930 `#[deriving(Hash)]` is now possible.
5931 * std: `SharedChan` has been removed, `Sender` is now cloneable.
5932 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
5933 * std: `Chan::new` is now `channel()`.
5934 * std: A new synchronous channel type has been implemented.
5935 * std: A `select!` macro is now provided for selecting over `Receiver`s.
5936 * std: `hashmap` and `trie` have been moved to `libcollections`
5937 * std: `run` has been rolled into `io::process`
5938 * std: `assert_eq!` now uses `{}` instead of `{:?}`
5939 * std: The equality and comparison traits have seen some reorganization.
5940 * std: `rand` has moved to `librand`.
5941 * std: `to_{lower,upper}case` has been implemented for `char`.
5942 * std: Logging has been moved to `liblog`.
5943 * collections: `HashMap` has been rewritten for higher performance and less
5945 * native: The default runtime is now `libnative`. If `libgreen` is desired,
5946 it can be booted manually. The runtime guide has more information and
5948 * native: All I/O functionality except signals has been implemented.
5949 * green: Task spawning with `libgreen` has been optimized with stack caching
5950 and various trimming of code.
5951 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
5952 * sync: The `extra::sync` module has been updated to modern rust (and moved
5953 to the `sync` library), tweaking and improving various interfaces while
5954 dropping redundant functionality.
5955 * sync: A new `Barrier` type has been added to the `sync` library.
5956 * sync: An efficient mutex for native and green tasks has been implemented.
5957 * serialize: The `base64` module has seen some improvement. It treats
5958 newlines better, has non-string error values, and has seen general
5960 * fourcc: A `fourcc!` macro was introduced
5961 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
5962 hexadecimal literal.
5965 * `rustpkg` has been deprecated and removed from the main repository. Its
5966 replacement, `cargo`, is under development.
5967 * Nightly builds of rust are now available
5968 * The memory usage of rustc has been improved many times throughout this
5970 * The build process supports disabling rpath support for the rustc binary
5972 * Code generation has improved in some cases, giving more information to the
5973 LLVM optimization passes to enable more extensive optimizations.
5974 * Debuginfo compatibility with lldb on OSX has been restored.
5975 * The master branch is now gated on an android bot, making building for
5976 android much more reliable.
5977 * Output flags have been centralized into one `--emit` flag.
5978 * Crate type flags have been centralized into one `--crate-type` flag.
5979 * Codegen flags have been consolidated behind a `-C` flag.
5980 * Linking against outdated crates now has improved error messages.
5981 * Error messages with lifetimes will often suggest how to annotate the
5982 function to fix the error.
5983 * Many more types are documented in the standard library, and new guides
5985 * Many `rustdoc` improvements:
5986 * code blocks are syntax highlighted.
5987 * render standalone markdown files.
5988 * the --test flag tests all code blocks by default.
5989 * exported macros are displayed.
5990 * re-exported types have their documentation inlined at the location of the
5992 * search works across crates that have been rendered to the same output
5996 Version 0.9 (2014-01-09)
5997 ==========================
5999 * ~1800 changes, numerous bugfixes
6002 * The `float` type has been removed. Use `f32` or `f64` instead.
6003 * A new facility for enabling experimental features (feature gating) has
6004 been added, using the crate-level `#[feature(foo)]` attribute.
6005 * Managed boxes (@) are now behind a feature gate
6006 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
6007 standard library's `Gc` or `Rc` types instead.
6008 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
6009 * Jumping back to the top of a loop is now done with `continue` instead of
6011 * Strings can no longer be mutated through index assignment.
6012 * Raw strings can be created via the basic `r"foo"` syntax or with matched
6013 hash delimiters, as in `r###"foo"###`.
6014 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
6016 * The `&fn` type is now written `|args| -> ret` to match the literal form.
6017 * `@fn`s have been removed.
6018 * `do` only works with procs in order to make it obvious what the cost
6020 * Single-element tuple-like structs can no longer be dereferenced to
6021 obtain the inner value. A more comprehensive solution for overloading
6022 the dereference operator will be provided in the future.
6023 * The `#[link(...)]` attribute has been replaced with
6024 `#[crate_id = "name#vers"]`.
6025 * Empty `impl`s must be terminated with empty braces and may not be
6026 terminated with a semicolon.
6027 * Keywords are no longer allowed as lifetime names; the `self` lifetime
6028 no longer has any special meaning.
6029 * The old `fmt!` string formatting macro has been removed.
6030 * `printf!` and `printfln!` (old-style formatting) removed in favor of
6031 `print!` and `println!`.
6032 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
6033 * The `extern mod foo (name = "bar")` syntax has been removed. Use
6034 `extern mod foo = "bar"` instead.
6035 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
6036 * Macros can have attributes.
6037 * Macros can expand to items with attributes.
6038 * Macros can expand to multiple items.
6039 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
6040 * Comments may be nested.
6041 * Values automatically coerce to trait objects they implement, without
6043 * Enum discriminants are no longer an entire word but as small as needed to
6044 contain all the variants. The `repr` attribute can be used to override
6045 the discriminant size, as in `#[repr(int)]` for integer-sized, and
6046 `#[repr(C)]` to match C enums.
6047 * Non-string literals are not allowed in attributes (they never worked).
6048 * The FFI now supports variadic functions.
6049 * Octal numeric literals, as in `0o7777`.
6050 * The `concat!` syntax extension performs compile-time string concatenation.
6051 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
6052 removed as Rust no longer uses segmented stacks.
6053 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
6054 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
6055 not `*`; ignoring remaining fields of a struct is also done with `..`,
6056 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
6057 * `rustc` supports the "win64" calling convention via `extern "win64"`.
6058 * `rustc` supports the "system" calling convention, which defaults to the
6059 preferred convention for the target platform, "stdcall" on 32-bit Windows,
6061 * The `type_overflow` lint (default: warn) checks literals for overflow.
6062 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
6063 * The `attribute_usage` lint (default: warn) warns about unknown
6065 * The `unknown_features` lint (default: warn) warns about unknown
6067 * The `dead_code` lint (default: warn) checks for dead code.
6068 * Rust libraries can be linked statically to one another
6069 * `#[link_args]` is behind the `link_args` feature gate.
6070 * Native libraries are now linked with `#[link(name = "foo")]`
6071 * Native libraries can be statically linked to a rust crate
6072 (`#[link(name = "foo", kind = "static")]`).
6073 * Native OS X frameworks are now officially supported
6074 (`#[link(name = "foo", kind = "framework")]`).
6075 * The `#[thread_local]` attribute creates thread-local (not task-local)
6076 variables. Currently behind the `thread_local` feature gate.
6077 * The `return` keyword may be used in closures.
6078 * Types that can be copied via a memcpy implement the `Pod` kind.
6079 * The `cfg` attribute can now be used on struct fields and enum variants.
6082 * std: The `option` and `result` API's have been overhauled to make them
6083 simpler, more consistent, and more composable.
6084 * std: The entire `std::io` module has been replaced with one that is
6085 more comprehensive and that properly interfaces with the underlying
6086 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
6088 * std: `io::util` contains a number of useful implementations of
6089 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
6090 `ZeroReader`, `TeeReader`.
6091 * std: The reference counted pointer type `extra::rc` moved into std.
6092 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
6093 just a wrapper around it).
6094 * std: The `Either` type has been removed.
6095 * std: `fmt::Default` can be implemented for any type to provide default
6096 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
6097 * std: The `rand` API continues to be tweaked.
6098 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
6099 on failure in gdb, is now named `rust_fail`.
6100 * std: The `each_key` and `each_value` methods on `HashMap` have been
6101 replaced by the `keys` and `values` iterators.
6102 * std: Functions dealing with type size and alignment have moved from the
6103 `sys` module to the `mem` module.
6104 * std: The `path` module was written and API changed.
6105 * std: `str::from_utf8` has been changed to cast instead of allocate.
6106 * std: `starts_with` and `ends_with` methods added to vectors via the
6107 `ImmutableEqVector` trait, which is in the prelude.
6108 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
6109 if the index is out of bounds.
6110 * std: Task failure no longer propagates between tasks, as the model was
6111 complex, expensive, and incompatible with thread-based tasks.
6112 * std: The `Any` type can be used for dynamic typing.
6113 * std: `~Any` can be passed to the `fail!` macro and retrieved via
6115 * std: Methods that produce iterators generally do not have an `_iter`
6117 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
6118 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
6119 * std: `util::ignore` renamed to `prelude::drop`.
6120 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
6122 * std: `vec::raw` has seen a lot of cleanup and API changes.
6123 * std: The standard library no longer includes any C++ code, and very
6124 minimal C, eliminating the dependency on libstdc++.
6125 * std: Runtime scheduling and I/O functionality has been factored out into
6126 extensible interfaces and is now implemented by two different crates:
6127 libnative, for native threading and I/O; and libgreen, for green threading
6128 and I/O. This paves the way for using the standard library in more limited
6129 embedded environments.
6130 * std: The `comm` module has been rewritten to be much faster, have a
6131 simpler, more consistent API, and to work for both native and green
6133 * std: All libuv dependencies have been moved into the rustuv crate.
6134 * native: New implementations of runtime scheduling on top of OS threads.
6135 * native: New native implementations of TCP, UDP, file I/O, process spawning,
6137 * green: The green thread scheduler and message passing types are almost
6139 * extra: The `flatpipes` module had bitrotted and was removed.
6140 * extra: All crypto functions have been removed and Rust now has a policy of
6141 not reimplementing crypto in the standard library. In the future crypto
6142 will be provided by external crates with bindings to established libraries.
6143 * extra: `c_vec` has been modernized.
6144 * extra: The `sort` module has been removed. Use the `sort` method on
6148 * The `rust` and `rusti` commands have been removed, due to lack of
6150 * `rustdoc` was completely rewritten.
6151 * `rustdoc` can test code examples in documentation.
6152 * `rustpkg` can test packages with the argument, 'test'.
6153 * `rustpkg` supports arbitrary dependencies, including C libraries.
6154 * `rustc`'s support for generating debug info is improved again.
6155 * `rustc` has better error reporting for unbalanced delimiters.
6156 * `rustc`'s JIT support was removed due to bitrot.
6157 * Executables and static libraries can be built with LTO (-Z lto)
6158 * `rustc` adds a `--dep-info` flag for communicating dependencies to
6162 Version 0.8 (2013-09-26)
6163 ============================
6165 * ~2200 changes, numerous bugfixes
6168 * The `for` loop syntax has changed to work with the `Iterator` trait.
6169 * At long last, unwinding works on Windows.
6170 * Default methods are ready for use.
6171 * Many trait inheritance bugs fixed.
6172 * Owned and borrowed trait objects work more reliably.
6173 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
6174 * rustc can omit emission of code for the `debug!` macro if it is passed
6176 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
6177 for foo.rs, then foo/mod.rs, and will generate an error when both are
6179 * Strings no longer contain trailing nulls. The new `std::c_str` module
6180 provides new mechanisms for converting to C strings.
6181 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
6182 * The FFI has been overhauled such that foreign functions are called directly,
6183 instead of through a stack-switching wrapper.
6184 * Calling a foreign function must be done through a Rust function with the
6185 `#[fixed_stack_segment]` attribute.
6186 * The `externfn!` macro can be used to declare both a foreign function and
6187 a `#[fixed_stack_segment]` wrapper at once.
6188 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
6189 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
6190 * `priv` is disallowed everywhere except for struct fields and enum variants.
6191 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
6192 * `ref` bindings in irrefutable patterns work correctly now.
6193 * `char` is now prevented from containing invalid code points.
6194 * Casting to `bool` is no longer allowed.
6195 * `\0` is now accepted as an escape in chars and strings.
6196 * `yield` is a reserved keyword.
6197 * `typeof` is a reserved keyword.
6198 * Crates may be imported by URL with `extern mod foo = "url";`.
6199 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
6200 * Static vectors can be initialized with repeating elements,
6201 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
6202 * Static structs can be initialized with functional record update,
6203 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
6204 * `cfg!` can be used to conditionally execute code based on the crate
6205 configuration, similarly to `#[cfg(...)]`.
6206 * The `unnecessary_qualification` lint detects unneeded module
6207 prefixes (default: allow).
6208 * Arithmetic operations have been implemented on the SIMD types in
6209 `std::unstable::simd`.
6210 * Exchange allocation headers were removed, reducing memory usage.
6211 * `format!` implements a completely new, extensible, and higher-performance
6212 string formatting system. It will replace `fmt!`.
6213 * `print!` and `println!` write formatted strings (using the `format!`
6214 extension) to stdout.
6215 * `write!` and `writeln!` write formatted strings (using the `format!`
6216 extension) to the new Writers in `std::rt::io`.
6217 * The library section in which a function or static is placed may
6218 be specified with `#[link_section = "..."]`.
6219 * The `proto!` syntax extension for defining bounded message protocols
6221 * `macro_rules!` is hygienic for `let` declarations.
6222 * The `#[export_name]` attribute specifies the name of a symbol.
6223 * `unreachable!` can be used to indicate unreachable code, and fails
6227 * std: Transitioned to the new runtime, written in Rust.
6228 * std: Added an experimental I/O library, `rt::io`, based on the new
6230 * std: A new generic `range` function was added to the prelude, replacing
6231 `uint::range` and friends.
6232 * std: `range_rev` no longer exists. Since range is an iterator it can be
6233 reversed with `range(lo, hi).invert()`.
6234 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
6235 renamed to `unwrap_or`.
6236 * std: The `iterator` module was renamed to `iter`.
6237 * std: Integral types now support the `checked_add`, `checked_sub`, and
6238 `checked_mul` operations for detecting overflow.
6239 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
6241 * std: Methods are standardizing on conventions for casting methods:
6242 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
6244 * std: The `CString` type in `c_str` provides new ways to convert to and
6246 * std: `DoubleEndedIterator` can yield elements in two directions.
6247 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
6249 * std: `str::from_bytes` renamed to `str::from_utf8`.
6250 * std: `pop_opt` and `shift_opt` methods added to vectors.
6251 * std: The task-local data interface no longer uses @, and keys are
6252 no longer function pointers.
6253 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
6254 * std: Added `SharedPort` to `comm`.
6255 * std: `Eq` has a default method for `ne`; only `eq` is required
6257 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
6258 is required in implementations.
6259 * std: `is_utf8` performance is improved, impacting many string functions.
6260 * std: `os::MemoryMap` provides cross-platform mmap.
6261 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
6262 are not 'in-bounds' are considered undefined.
6263 * std: Many freestanding functions in `vec` removed in favor of methods.
6264 * std: Many freestanding functions on scalar types removed in favor of
6266 * std: Many options to task builders were removed since they don't make
6267 sense in the new scheduler design.
6268 * std: More containers implement `FromIterator` so can be created by the
6270 * std: More complete atomic types in `unstable::atomics`.
6271 * std: `comm::PortSet` removed.
6272 * std: Mutating methods in the `Set` and `Map` traits have been moved into
6273 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
6274 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
6275 default implementations.
6276 * std: Various `from_str` functions were removed in favor of a generic
6277 `from_str` which is available in the prelude.
6278 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
6279 * extra: `dlist`, the doubly-linked list was modernized.
6280 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
6281 * extra: Added `glob` module, replacing `std::os::glob`.
6282 * extra: `rope` was removed.
6283 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
6284 * extra: `net`, and `timer` were removed. The experimental replacements
6285 are `std::rt::io::net` and `std::rt::io::timer`.
6286 * extra: Iterators implemented for `SmallIntMap`.
6287 * extra: Iterators implemented for `Bitv` and `BitvSet`.
6288 * extra: `SmallIntSet` removed. Use `BitvSet`.
6289 * extra: Performance of JSON parsing greatly improved.
6290 * extra: `semver` updated to SemVer 2.0.0.
6291 * extra: `term` handles more terminals correctly.
6292 * extra: `dbg` module removed.
6293 * extra: `par` module removed.
6294 * extra: `future` was cleaned up, with some method renames.
6295 * extra: Most free functions in `getopts` were converted to methods.
6298 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
6299 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
6300 similarly to gcc's `--march` flag.
6301 * rustc's performance compiling small crates is much better.
6302 * rustpkg has received many improvements.
6303 * rustpkg supports git tags as package IDs.
6304 * rustpkg builds into target-specific directories so it can be used for
6306 * The number of concurrent test tasks is controlled by the environment
6307 variable RUST_TEST_TASKS.
6308 * The test harness can now report metrics for benchmarks.
6309 * All tools have man pages.
6310 * Programs compiled with `--test` now support the `-h` and `--help` flags.
6311 * The runtime uses jemalloc for allocations.
6312 * Segmented stacks are temporarily disabled as part of the transition to
6313 the new runtime. Stack overflows are possible!
6314 * A new documentation backend, rustdoc_ng, is available for use. It is
6315 still invoked through the normal `rustdoc` command.
6318 Version 0.7 (2013-07-03)
6319 =======================
6321 * ~2000 changes, numerous bugfixes
6324 * `impl`s no longer accept a visibility qualifier. Put them on methods
6326 * The borrow checker has been rewritten with flow-sensitivity, fixing
6327 many bugs and inconveniences.
6328 * The `self` parameter no longer implicitly means `&'self self`,
6329 and can be explicitly marked with a lifetime.
6330 * Overloadable compound operators (`+=`, etc.) have been temporarily
6331 removed due to bugs.
6332 * The `for` loop protocol now requires `for`-iterators to return `bool`
6333 so they compose better.
6334 * The `Durable` trait is replaced with the `'static` bounds.
6335 * Trait default methods work more often.
6336 * Structs with the `#[packed]` attribute have byte alignment and
6337 no padding between fields.
6338 * Type parameters bound by `Copy` must now be copied explicitly with
6340 * It is now illegal to move out of a dereferenced unsafe pointer.
6341 * `Option<~T>` is now represented as a nullable pointer.
6342 * `@mut` does dynamic borrow checks correctly.
6343 * The `main` function is only detected at the topmost level of the crate.
6344 The `#[main]` attribute is still valid anywhere.
6345 * Struct fields may no longer be mutable. Use inherited mutability.
6346 * The `#[no_send]` attribute makes a type that would otherwise be
6348 * The `#[no_freeze]` attribute makes a type that would otherwise be
6350 * Unbounded recursion will abort the process after reaching the limit
6351 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
6352 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
6353 are never implicitly copyable.
6354 * `#[static_assert]` makes compile-time assertions about static bools.
6355 * At long last, 'argument modes' no longer exist.
6356 * The rarely used `use mod` statement no longer exists.
6359 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
6361 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
6362 `Rand`, `Zero` and `ToStr` can all be automatically derived with
6364 * The `bytes!` macro returns a vector of bytes for string, u8, char,
6365 and unsuffixed integer literals.
6368 * The `core` crate was renamed to `std`.
6369 * The `std` crate was renamed to `extra`.
6370 * More and improved documentation.
6371 * std: `iterator` module for external iterator objects.
6372 * Many old-style (internal, higher-order function) iterators replaced by
6373 implementations of `Iterator`.
6374 * std: Many old internal vector and string iterators,
6375 incl. `any`, `all`. removed.
6376 * std: The `finalize` method of `Drop` renamed to `drop`.
6377 * std: The `drop` method now takes `&mut self` instead of `&self`.
6378 * std: The prelude no longer re-exports any modules, only types and traits.
6379 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
6380 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
6381 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
6382 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
6383 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
6384 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
6385 * std: Many types implement `Clone`.
6386 * std: `path` type renamed to `Path`.
6387 * std: `mut` module and `Mut` type removed.
6388 * std: Many standalone functions removed in favor of methods and iterators
6389 in `vec`, `str`. In the future methods will also work as functions.
6390 * std: `reinterpret_cast` removed. Use `transmute`.
6391 * std: ascii string handling in `std::ascii`.
6392 * std: `Rand` is implemented for ~/@.
6393 * std: `run` module for spawning processes overhauled.
6394 * std: Various atomic types added to `unstable::atomic`.
6395 * std: Various types implement `Zero`.
6396 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
6397 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
6398 * std: Added `os::mkdir_recursive`.
6399 * std: Added `os::glob` function performs filesystems globs.
6400 * std: `FuzzyEq` renamed to `ApproxEq`.
6401 * std: `Map` now defines `pop` and `swap` methods.
6402 * std: `Cell` constructors converted to static methods.
6403 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
6404 * extra: `flate` module moved from `std` to `extra`.
6405 * extra: `fileinput` module for iterating over a series of files.
6406 * extra: `Complex` number type and `complex` module.
6407 * extra: `Rational` number type and `rational` module.
6408 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
6409 * extra: `term` uses terminfo now, is more correct.
6410 * extra: `arc` functions converted to methods.
6411 * extra: Implementation of fixed output size variations of SHA-2.
6414 * `unused_variable` lint mode for unused variables (default: warn).
6415 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
6417 * `unused_mut` lint mode for identifying unused `mut` qualifiers
6419 * `dead_assignment` lint mode for unread variables (default: warn).
6420 * `unnecessary_allocation` lint mode detects some heap allocations that are
6421 immediately borrowed so could be written without allocating (default: warn).
6422 * `missing_doc` lint mode (default: allow).
6423 * `unreachable_code` lint mode (default: warn).
6424 * The `rusti` command has been rewritten and a number of bugs addressed.
6425 * rustc outputs in color on more terminals.
6426 * rustc accepts a `--link-args` flag to pass arguments to the linker.
6427 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
6428 * Compiling with `-g` will make the binary record information about
6429 dynamic borrowcheck failures for debugging.
6430 * rustdoc has a nicer stylesheet.
6431 * Various improvements to rustdoc.
6432 * Improvements to rustpkg (see the detailed release notes).
6435 Version 0.6 (2013-04-03)
6436 ========================
6438 * ~2100 changes, numerous bugfixes
6441 * The self type parameter in traits is now spelled `Self`
6442 * The `self` parameter in trait and impl methods must now be explicitly
6443 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
6444 * Static methods no longer require the `static` keyword and instead
6445 are distinguished by the lack of a `self` parameter
6446 * Replaced the `Durable` trait with the `'static` lifetime
6447 * The old closure type syntax with the trailing sigil has been
6448 removed in favor of the more consistent leading sigil
6449 * `super` is a keyword, and may be prefixed to paths
6450 * Trait bounds are separated with `+` instead of whitespace
6451 * Traits are implemented with `impl Trait for Type`
6452 instead of `impl Type: Trait`
6453 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
6454 * The `export` keyword has finally been removed
6455 * The `move` keyword has been removed (see "Semantic changes")
6456 * The interior mutability qualifier on vectors, `[mut T]`, has been
6457 removed. Use `&mut [T]`, etc.
6458 * `mut` is no longer valid in `~mut T`. Use inherited mutability
6459 * `fail` is no longer a keyword. Use `fail!()`
6460 * `assert` is no longer a keyword. Use `assert!()`
6461 * `log` is no longer a keyword. use `debug!`, etc.
6462 * 1-tuples may be represented as `(T,)`
6463 * Struct fields may no longer be `mut`. Use inherited mutability,
6464 `@mut T`, `core::mut` or `core::cell`
6465 * `extern mod { ... }` is no longer valid syntax for foreign
6466 function modules. Use extern blocks: `extern { ... }`
6467 * Newtype enums removed. Use tuple-structs.
6468 * Trait implementations no longer support visibility modifiers
6469 * Pattern matching over vectors improved and expanded
6470 * `const` renamed to `static` to correspond to lifetime name,
6471 and make room for future `static mut` unsafe mutable globals.
6472 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
6473 * `Clone` implementations can be automatically generated with
6474 `#[deriving(Clone)]`
6475 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
6476 instead of `foo as Bar`.
6477 * Fixed length vector types are now written as `[int, .. 3]`
6478 instead of `[int * 3]`.
6479 * Fixed length vector types can express the length as a constant
6480 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
6483 * Types with owned pointers or custom destructors move by default,
6484 eliminating the `move` keyword
6485 * All foreign functions are considered unsafe
6486 * &mut is now unaliasable
6487 * Writes to borrowed @mut pointers are prevented dynamically
6489 * The name of the main function can be customized using #[main]
6490 * The default type of an inferred closure is &fn instead of @fn
6491 * `use` statements may no longer be "chained" - they cannot import
6492 identifiers imported by previous `use` statements
6493 * `use` statements are crate relative, importing from the "top"
6494 of the crate by default. Paths may be prefixed with `super::`
6495 or `self::` to change the search behavior.
6496 * Method visibility is inherited from the implementation declaration
6497 * Structural records have been removed
6498 * Many more types can be used in static items, including enums
6499 'static-lifetime pointers and vectors
6500 * Pattern matching over vectors improved and expanded
6501 * Typechecking of closure types has been overhauled to
6502 improve inference and eliminate unsoundness
6503 * Macros leave scope at the end of modules, unless that module is
6504 tagged with #[macro_escape]
6507 * Added big integers to `std::bigint`
6508 * Removed `core::oldcomm` module
6509 * Added pipe-based `core::comm` module
6510 * Numeric traits have been reorganized under `core::num`
6511 * `vec::slice` finally returns a slice
6512 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
6513 * Containers reorganized around traits in `core::container`
6514 * `core::dvec` removed, `~[T]` is a drop-in replacement
6515 * `core::send_map` renamed to `core::hashmap`
6516 * `std::map` removed; replaced with `core::hashmap`
6517 * `std::treemap` reimplemented as an owned balanced tree
6518 * `std::deque` and `std::smallintmap` reimplemented as owned containers
6519 * `core::trie` added as a fast ordered map for integer keys
6520 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
6521 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
6522 overload the comparison operators, whereas `TotalOrd` is used
6523 by certain container types
6526 * Replaced the 'cargo' package manager with 'rustpkg'
6527 * Added all-purpose 'rust' tool
6528 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
6529 * rustc now *attempts* to offer spelling suggestions
6530 * Improved support for ARM and Android
6531 * Preliminary MIPS backend
6532 * Improved foreign function ABI implementation for x86, x86_64
6533 * Various memory usage improvements
6534 * Rust code may be embedded in foreign code under limited circumstances
6535 * Inline assembler supported by new asm!() syntax extension.
6538 Version 0.5 (2012-12-21)
6539 ===========================
6541 * ~900 changes, numerous bugfixes
6544 * Removed `<-` move operator
6545 * Completed the transition from the `#fmt` extension syntax to `fmt!`
6546 * Removed old fixed length vector syntax - `[T]/N`
6547 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
6548 * Macros may now expand to items and statements
6549 * `a.b()` is always parsed as a method call, never as a field projection
6550 * `Eq` and `IterBytes` implementations can be automatically generated
6551 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
6552 * Removed the special crate language for `.rc` files
6553 * Function arguments may consist of any irrefutable pattern
6556 * `&` and `~` pointers may point to objects
6557 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
6558 * Enum variants may be structs
6559 * Destructors can be added to all nominal types with the Drop trait
6560 * Structs and nullary enum variants may be constants
6561 * Values that cannot be implicitly copied are now automatically moved
6562 without writing `move` explicitly
6563 * `&T` may now be coerced to `*T`
6564 * Coercions happen in `let` statements as well as function calls
6565 * `use` statements now take crate-relative paths
6566 * The module and type namespaces have been merged so that static
6567 method names can be resolved under the trait in which they are
6570 * Improved support for language features
6571 * Trait inheritance works in many scenarios
6572 * More support for explicit self arguments in methods - `self`, `&self`
6573 `@self`, and `~self` all generally work as expected
6574 * Static methods work in more situations
6575 * Experimental: Traits may declare default methods for the implementations
6579 * New condition handling system in `core::condition`
6580 * Timsort added to `std::sort`
6581 * New priority queue, `std::priority_queue`
6582 * Pipes for serializable types, `std::flatpipes'
6583 * Serialization overhauled to be trait-based
6584 * Expanded `getopts` definitions
6585 * Moved futures to `std`
6586 * More functions are pure now
6587 * `core::comm` renamed to `oldcomm`. Still deprecated
6588 * `rustdoc` and `cargo` are libraries now
6591 * Added a preliminary REPL, `rusti`
6592 * License changed from MIT to dual MIT/APL2
6595 Version 0.4 (2012-10-15)
6596 ==========================
6598 * ~2000 changes, numerous bugfixes
6601 * All keywords are now strict and may not be used as identifiers anywhere
6602 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
6603 'of', 'with', 'to', 'class'.
6604 * Classes are replaced with simpler structs
6605 * Explicit method self types
6606 * `ret` became `return` and `alt` became `match`
6607 * `import` is now `use`; `use is now `extern mod`
6608 * `extern mod { ... }` is now `extern { ... }`
6609 * `use mod` is the recommended way to import modules
6610 * `pub` and `priv` replace deprecated export lists
6611 * The syntax of `match` pattern arms now uses fat arrow (=>)
6612 * `main` no longer accepts an args vector; use `os::args` instead
6615 * Trait implementations are now coherent, ala Haskell typeclasses
6616 * Trait methods may be static
6617 * Argument modes are deprecated
6618 * Borrowed pointers are much more mature and recommended for use
6619 * Strings and vectors in the static region are stored in constant memory
6620 * Typestate was removed
6621 * Resolution rewritten to be more reliable
6622 * Support for 'dual-mode' data structures (freezing and thawing)
6625 * Most binary operators can now be overloaded via the traits in
6627 * `std::net::url` for representing URLs
6628 * Sendable hash maps in `core::send_map`
6629 * `core::task' gained a (currently unsafe) task-local storage API
6632 * An efficient new intertask communication primitive called the pipe,
6633 along with a number of higher-level channel types, in `core::pipes`
6634 * `std::arc`, an atomically reference counted, immutable, shared memory
6636 * `std::sync`, various exotic synchronization tools based on arcs and pipes
6637 * Futures are now based on pipes and sendable
6638 * More robust linked task failure
6639 * Improved task builder API
6642 * Improved error reporting
6643 * Preliminary JIT support
6644 * Preliminary work on precise GC
6645 * Extensive architectural improvements to rustc
6646 * Begun a transition away from buggy C++-based reflection (shape) code to
6647 Rust-based (visitor) code
6648 * All hash functions and tables converted to secure, randomized SipHash
6651 Version 0.3 (2012-07-12)
6652 ========================
6654 * ~1900 changes, numerous bugfixes
6656 * New coding conveniences
6657 * Integer-literal suffix inference
6658 * Per-item control over warnings, errors
6659 * #[cfg(windows)] and #[cfg(unix)] attributes
6660 * Documentation comments
6661 * More compact closure syntax
6662 * 'do' expressions for treating higher-order functions as
6664 * *-patterns (wildcard extended to all constructor fields)
6667 * Name resolution pass and exhaustiveness checker rewritten
6668 * Region pointers and borrow checking supersede alias
6670 * Init-ness checking is now provided by a region-based liveness
6671 pass instead of the typestate pass; same for last-use analysis
6672 * Extensive work on region pointers
6674 * Experimental new language features
6675 * Slices and fixed-size, interior-allocated vectors
6676 * #!-comments for lang versioning, shell execution
6677 * Destructors and iface implementation for classes;
6678 type-parameterized classes and class methods
6679 * 'const' type kind for types that can be used to implement
6680 shared-memory concurrency patterns
6684 * Removal of various obsolete features
6685 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
6686 'crust', 'native' (now 'extern'), 'cont' (now 'again')
6688 * Constructs: do-while loops ('do' repurposed), fn binding,
6689 resources (replaced by destructors)
6691 * Compiler reorganization
6692 * Syntax-layer of compiler split into separate crate
6693 * Clang (from LLVM project) integrated into build
6694 * Typechecker split into sub-modules
6697 * New time functions
6698 * Extension methods for many built-in types
6699 * Arc: atomic-refcount read-only / exclusive-use shared cells
6700 * Par: parallel map and search routines
6701 * Extensive work on libuv interface
6702 * Much vector code moved to libraries
6703 * Syntax extensions: #line, #col, #file, #mod, #stringify,
6704 #include, #include_str, #include_bin
6707 * Cargo automatically resolves dependencies
6710 Version 0.2 (2012-03-29)
6711 =========================
6713 * >1500 changes, numerous bugfixes
6715 * New docs and doc tooling
6717 * New port: FreeBSD x86_64
6719 * Compilation model enhancements
6720 * Generics now specialized, multiply instantiated
6721 * Functions now inlined across separate crates
6723 * Scheduling, stack and threading fixes
6724 * Noticeably improved message-passing performance
6725 * Explicit schedulers
6729 * Experimental new language features
6730 * Operator overloading
6734 * Various language extensions
6735 * C-callback function types: 'crust fn ...'
6736 * Infinite-loop construct: 'loop { ... }'
6737 * Shorten 'mutable' to 'mut'
6738 * Required mutable-local qualifier: 'let mut ...'
6739 * Basic glob-exporting: 'export foo::*;'
6740 * Alt now exhaustive, 'alt check' for runtime-checked
6741 * Block-function form of 'for' loop, with 'break' and 'ret'.
6744 * AST quasi-quote syntax extension
6745 * Revived libuv interface
6746 * New modules: core::{future, iter}, std::arena
6747 * Merged per-platform std::{os*, fs*} to core::{libc, os}
6748 * Extensive cleanup, regularization in libstd, libcore
6751 Version 0.1 (2012-01-20)
6752 ===============================
6754 * Most language features work, including:
6755 * Unique pointers, unique closures, move semantics
6756 * Interface-constrained generics
6757 * Static interface dispatch
6759 * Multithread task scheduling
6760 * Typestate predicates
6761 * Failure unwinding, destructors
6762 * Pattern matching and destructuring assignment
6763 * Lightweight block-lambda syntax
6764 * Preliminary macro-by-example
6766 * Compiler works with the following configurations:
6767 * Linux: x86 and x86_64 hosts and targets
6768 * macOS: x86 and x86_64 hosts and targets
6769 * Windows: x86 hosts and targets
6771 * Cross compilation / multi-target configuration supported.
6773 * Preliminary API-documentation and package-management tools included.
6777 * Documentation is incomplete.
6779 * Performance is below intended target.
6781 * Standard library APIs are subject to extensive change, reorganization.
6783 * Language-level versioning is not yet operational - future code will