1 Version 1.25.0 (2018-03-29)
2 ==========================
6 - [Stabilised `#[repr(align(x))]`.][47006] [RFC 1358]
7 - [You can now use nested groups of imports.][47948]
8 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
9 - [You can now have `|` at the start of a match arm.][47947] e.g.
17 | Foo::B => println!("AB"),
18 | Foo::C => println!("C"),
25 - [Upgraded to LLVM 6.][47828]
26 - [Added `-C lto=val` option.][47521]
27 - [Added `i586-unknown-linux-musl` target][47282]
31 - [Impl Send for `process::Command` on Unix.][47760]
32 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
33 - [`UnsafeCell::into_inner` is now safe.][47204]
34 - [Implement libstd for CloudABI.][47268]
35 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
36 - [Implement `AsRef<Path>` for Component][46985]
37 - [Implemented `Write` for `Cursor<&mut Vec<T>>`][46830]
38 - [Moved `Duration` to libcore.][46666]
42 - [`Location::column`]
45 The following functions can now be used in a constant expression.
46 eg. `static MINUTE: Duration = Duration::from_secs(60);`
47 - [`Duration::new`][47300]
48 - [`Duration::from_secs`][47300]
49 - [`Duration::from_millis`][47300]
50 - [`Duration::from_micros`][47300]
51 - [`Duration::from_nanos`][47300]
55 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
56 - [`cargo new` now defaults to creating a binary crate, instead of a
57 library crate.][cargo/5029]
61 - [Rust by example is now shipped with new releases][46196]
65 - [Deprecated `net::lookup_host`.][47510]
66 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
67 - The borrow checker was sometimes incorrectly permitting overlapping borrows
68 around indexing operations (see [#47349][47349]). This has been fixed (which also
69 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
70 - [Removed deprecated unstable attribute `#[simd]`.][47251]
72 [33903]: https://github.com/rust-lang/rust/pull/33903
73 [47947]: https://github.com/rust-lang/rust/pull/47947
74 [47948]: https://github.com/rust-lang/rust/pull/47948
75 [47760]: https://github.com/rust-lang/rust/pull/47760
76 [47790]: https://github.com/rust-lang/rust/pull/47790
77 [47828]: https://github.com/rust-lang/rust/pull/47828
78 [47398]: https://github.com/rust-lang/rust/pull/47398
79 [47510]: https://github.com/rust-lang/rust/pull/47510
80 [47521]: https://github.com/rust-lang/rust/pull/47521
81 [47204]: https://github.com/rust-lang/rust/pull/47204
82 [47251]: https://github.com/rust-lang/rust/pull/47251
83 [47268]: https://github.com/rust-lang/rust/pull/47268
84 [47282]: https://github.com/rust-lang/rust/pull/47282
85 [47300]: https://github.com/rust-lang/rust/pull/47300
86 [47349]: https://github.com/rust-lang/rust/pull/47349
87 [46931]: https://github.com/rust-lang/rust/pull/46931
88 [46985]: https://github.com/rust-lang/rust/pull/46985
89 [47006]: https://github.com/rust-lang/rust/pull/47006
90 [46830]: https://github.com/rust-lang/rust/pull/46830
91 [46095]: https://github.com/rust-lang/rust/pull/46095
92 [46666]: https://github.com/rust-lang/rust/pull/46666
93 [46196]: https://github.com/rust-lang/rust/pull/46196
94 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
95 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
96 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
97 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
98 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
101 Version 1.24.0 (2018-02-15)
102 ==========================
106 - [External `sysv64` ffi is now available.][46528]
107 eg. `extern "sysv64" fn foo () {}`
111 - [rustc now uses 16 codegen units by default for release builds.][46910]
112 For the fastest builds, utilize `codegen-units=1`.
113 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
114 - [Add `aarch64-unknown-openbsd` support][46760]
118 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
119 improvement in performance in the majority of cases.
120 - [`OsStr`'s `Debug` implementation is now lossless and consistent
121 with Windows.][46798]
122 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
123 - [impl `From<bool>` for `AtomicBool`][46293]
124 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
125 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
126 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
127 - [float::from_bits now just uses transmute.][46012] This provides
128 some optimisations from LLVM.
129 - [Copied `AsciiExt` methods onto `char`][46077]
130 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
131 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
132 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
133 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
137 - [`RefCell::replace`]
139 - [`atomic::spin_loop_hint`]
141 The following functions can now be used in a constant expression.
142 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
144 - [`AtomicBool::new`][46287]
145 - [`AtomicUsize::new`][46287]
146 - [`AtomicIsize::new`][46287]
147 - [`AtomicPtr::new`][46287]
148 - [`Cell::new`][46287]
149 - [`{integer}::min_value`][46287]
150 - [`{integer}::max_value`][46287]
151 - [`mem::size_of`][46287]
152 - [`mem::align_of`][46287]
153 - [`ptr::null`][46287]
154 - [`ptr::null_mut`][46287]
155 - [`RefCell::new`][46287]
156 - [`UnsafeCell::new`][46287]
160 - [Added a `workspace.default-members` config that
161 overrides implied `--all` in virtual workspaces.][cargo/4743]
162 - [Enable incremental by default on development builds.][cargo/4817] Also added
163 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
164 per-project or global basis respectively.
171 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
172 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
173 in accordance with IETF RFC 4291 ยง2.2.
174 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
175 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
176 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
177 - [Leading zeros in tuple struct members is now an error][47084]
178 - [`column!()` macro is one-based instead of zero-based][46977]
179 - [`fmt::Arguments` can no longer be shared across threads][45198]
180 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
181 - [Cargo sets a different working directory for the compiler][cargo/4788]
183 [44884]: https://github.com/rust-lang/rust/pull/44884
184 [45198]: https://github.com/rust-lang/rust/pull/45198
185 [45506]: https://github.com/rust-lang/rust/pull/45506
186 [45904]: https://github.com/rust-lang/rust/pull/45904
187 [45990]: https://github.com/rust-lang/rust/pull/45990
188 [46012]: https://github.com/rust-lang/rust/pull/46012
189 [46077]: https://github.com/rust-lang/rust/pull/46077
190 [46094]: https://github.com/rust-lang/rust/pull/46094
191 [46284]: https://github.com/rust-lang/rust/pull/46284
192 [46287]: https://github.com/rust-lang/rust/pull/46287
193 [46293]: https://github.com/rust-lang/rust/pull/46293
194 [46528]: https://github.com/rust-lang/rust/pull/46528
195 [46671]: https://github.com/rust-lang/rust/pull/46671
196 [46713]: https://github.com/rust-lang/rust/pull/46713
197 [46735]: https://github.com/rust-lang/rust/pull/46735
198 [46749]: https://github.com/rust-lang/rust/pull/46749
199 [46760]: https://github.com/rust-lang/rust/pull/46760
200 [46798]: https://github.com/rust-lang/rust/pull/46798
201 [46828]: https://github.com/rust-lang/rust/pull/46828
202 [46831]: https://github.com/rust-lang/rust/pull/46831
203 [46833]: https://github.com/rust-lang/rust/pull/46833
204 [46910]: https://github.com/rust-lang/rust/pull/46910
205 [46977]: https://github.com/rust-lang/rust/pull/46977
206 [47018]: https://github.com/rust-lang/rust/pull/47018
207 [47080]: https://github.com/rust-lang/rust/pull/47080
208 [47084]: https://github.com/rust-lang/rust/pull/47084
209 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
210 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
211 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
212 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
213 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
214 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
217 Version 1.23.0 (2018-01-04)
218 ==========================
222 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
223 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
224 Which should fix some confusing errors in some operations.
228 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
229 undefined behaviour.][45920]
230 - [rustc now suggests renaming import if names clash.][45660]
231 - [Display errors/warnings correctly when there are zero-width or
232 wide characters.][45711]
233 - [rustc now avoids unnecessary copies of arguments that are
234 simple bindings][45380] This should improve memory usage on average by 5-10%.
235 - [Updated musl used to build musl rustc to 1.1.17][45393]
239 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
240 - [Implement Hash for raw pointers to unsized types][45483]
241 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
242 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
243 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
244 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
245 and `<*mut T>::as_mut`][44932]
246 - [Optimized `Thread::{park, unpark}` implementation][45524]
247 - [Improved `SliceExt::binary_search` performance.][45333]
248 - [impl `FromIterator<()>` for `()`][45379]
249 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
257 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
258 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
259 - [Added unit test checking to `cargo check`][cargo/4592]
260 - [Cargo now lets you install a specific version
261 using `cargo install --version`][cargo/4637]
265 - [Releases now ship with the Cargo book documentation.][45692]
266 - [rustdoc now prints rendering warnings on every run.][45324]
270 - [Changes have been made to type equality to make it more correct,
271 in rare cases this could break some code.][45853] [Tracking issue for
272 further information][45852]
273 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
274 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
275 Android 9, the minimum supported version is Android 14.
276 - [Bumped the minimum LLVM to 3.9][45326]
278 [44042]: https://github.com/rust-lang/rust/pull/44042
279 [44932]: https://github.com/rust-lang/rust/pull/44932
280 [45267]: https://github.com/rust-lang/rust/pull/45267
281 [45324]: https://github.com/rust-lang/rust/pull/45324
282 [45326]: https://github.com/rust-lang/rust/pull/45326
283 [45333]: https://github.com/rust-lang/rust/pull/45333
284 [45379]: https://github.com/rust-lang/rust/pull/45379
285 [45380]: https://github.com/rust-lang/rust/pull/45380
286 [45393]: https://github.com/rust-lang/rust/pull/45393
287 [45435]: https://github.com/rust-lang/rust/pull/45435
288 [45483]: https://github.com/rust-lang/rust/pull/45483
289 [45524]: https://github.com/rust-lang/rust/pull/45524
290 [45571]: https://github.com/rust-lang/rust/pull/45571
291 [45580]: https://github.com/rust-lang/rust/pull/45580
292 [45610]: https://github.com/rust-lang/rust/pull/45610
293 [45660]: https://github.com/rust-lang/rust/pull/45660
294 [45692]: https://github.com/rust-lang/rust/pull/45692
295 [45711]: https://github.com/rust-lang/rust/pull/45711
296 [45772]: https://github.com/rust-lang/rust/pull/45772
297 [45852]: https://github.com/rust-lang/rust/issues/45852
298 [45853]: https://github.com/rust-lang/rust/pull/45853
299 [45887]: https://github.com/rust-lang/rust/pull/45887
300 [45920]: https://github.com/rust-lang/rust/pull/45920
301 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
302 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
303 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
306 Version 1.22.1 (2017-11-22)
307 ==========================
309 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
311 [46183]: https://github.com/rust-lang/rust/pull/46183
313 Version 1.22.0 (2017-11-22)
314 ==========================
318 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
319 - [Now accepts underscores in unicode escapes][43716]
320 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
321 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
325 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
326 - [rustc will no longer inline in codegen units when compiling for debug][45075]
327 This should decrease compile times for debug builds.
328 - [strict memory alignment now enabled on ARMv6][45094]
329 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
333 - [Allow atomic operations up to 32 bits
334 on `armv5te_unknown_linux_gnueabi`][44978]
335 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
336 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
337 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
338 - [Properly detect overflow in `Instant += Duration`.][44220]
339 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
340 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
341 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
348 - [Cargo will now build multi file examples in subdirectories of the `examples`
349 folder that have a `main.rs` file.][cargo/4496]
350 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
351 the old format will continue to work and can be updated with `cargo update`.
352 - [Now supports vendoring git repositories][cargo/3992]
356 - [`libbacktrace` is now available on Apple platforms.][44251]
357 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
358 This now lets you specify that a given code example will fail to compile.
362 - [The minimum Android version that rustc can build for has been bumped
363 to `4.0` from `2.3`][45656]
364 - [Allowing `T op= &T` for numeric types has broken some type
365 inference cases][45480]
368 [42526]: https://github.com/rust-lang/rust/pull/42526
369 [43017]: https://github.com/rust-lang/rust/pull/43017
370 [43716]: https://github.com/rust-lang/rust/pull/43716
371 [43949]: https://github.com/rust-lang/rust/pull/43949
372 [44015]: https://github.com/rust-lang/rust/pull/44015
373 [44220]: https://github.com/rust-lang/rust/pull/44220
374 [44251]: https://github.com/rust-lang/rust/pull/44251
375 [44287]: https://github.com/rust-lang/rust/pull/44287
376 [44303]: https://github.com/rust-lang/rust/pull/44303
377 [44456]: https://github.com/rust-lang/rust/pull/44456
378 [44466]: https://github.com/rust-lang/rust/pull/44466
379 [44895]: https://github.com/rust-lang/rust/pull/44895
380 [44966]: https://github.com/rust-lang/rust/pull/44966
381 [44978]: https://github.com/rust-lang/rust/pull/44978
382 [45041]: https://github.com/rust-lang/rust/pull/45041
383 [45064]: https://github.com/rust-lang/rust/pull/45064
384 [45075]: https://github.com/rust-lang/rust/pull/45075
385 [45094]: https://github.com/rust-lang/rust/pull/45094
386 [45095]: https://github.com/rust-lang/rust/pull/45095
387 [45480]: https://github.com/rust-lang/rust/issues/45480
388 [45656]: https://github.com/rust-lang/rust/pull/45656
389 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
390 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
391 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
398 Version 1.21.0 (2017-10-12)
399 ==========================
403 - [You can now use static references for literals.][43838]
407 let x: &'static u32 = &0;
410 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
413 my_macro!(Vec<i32>::new); // Always worked
414 my_macro!(Vec::<i32>::new); // Now works
419 - [Upgraded jemalloc to 4.5.0][43911]
420 - [Enabled unwinding panics on Redox][43917]
421 - [Now runs LLVM in parallel during translation phase.][43506]
422 This should reduce peak memory usage.
426 - [Generate builtin impls for `Clone` for all arrays and tuples that
427 are `T: Clone`][43690]
428 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
429 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
430 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
435 [`std::mem::discriminant`]
439 - [You can now call `cargo install` with multiple package names][cargo/4216]
440 - [Cargo commands inside a virtual workspace will now implicitly
441 pass `--all`][cargo/4335]
442 - [Added a `[patch]` section to `Cargo.toml` to handle
443 prepublication dependencies][cargo/4123] [RFC 1969]
444 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
445 like patterns][cargo/4270]
446 - [Added the `--all-targets` option][cargo/4400]
447 - [Using required dependencies as a feature is now deprecated and emits
448 a warning][cargo/4364]
453 - [Cargo docs are moving][43916]
454 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
455 - [The rustdoc book is now available][43863]
456 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
457 - [Added a preview of RLS has been made available through rustup][44204]
458 Install with `rustup component add rls-preview`
459 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
460 Previously only showed `std::os::unix`.
464 - [Changes in method matching against higher-ranked types][43880] This may cause
465 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
466 - [rustc's JSON error output's byte position start at top of file.][42973]
467 Was previously relative to the rustc's internal `CodeMap` struct which
468 required the unstable library `libsyntax` to correctly use.
469 - [`unused_results` lint no longer ignores booleans][43728]
471 [42565]: https://github.com/rust-lang/rust/pull/42565
472 [42973]: https://github.com/rust-lang/rust/pull/42973
473 [43348]: https://github.com/rust-lang/rust/pull/43348
474 [43459]: https://github.com/rust-lang/rust/pull/43459
475 [43506]: https://github.com/rust-lang/rust/pull/43506
476 [43540]: https://github.com/rust-lang/rust/pull/43540
477 [43690]: https://github.com/rust-lang/rust/pull/43690
478 [43728]: https://github.com/rust-lang/rust/pull/43728
479 [43838]: https://github.com/rust-lang/rust/pull/43838
480 [43863]: https://github.com/rust-lang/rust/pull/43863
481 [43880]: https://github.com/rust-lang/rust/pull/43880
482 [43911]: https://github.com/rust-lang/rust/pull/43911
483 [43916]: https://github.com/rust-lang/rust/pull/43916
484 [43917]: https://github.com/rust-lang/rust/pull/43917
485 [44204]: https://github.com/rust-lang/rust/pull/44204
486 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
487 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
488 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
489 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
490 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
491 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
492 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
493 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
494 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
496 Version 1.20.0 (2017-08-31)
497 ===========================
501 - [Associated constants are now stabilised.][42809]
502 - [A lot of macro bugs are now fixed.][42913]
507 - [Struct fields are now properly coerced to the expected field type.][42807]
508 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
509 `wasm32-experimental-emscripten` target.
510 - [Changed some of the error messages to be more helpful.][42033]
511 - [Add support for RELRO(RELocation Read-Only) for platforms that support
513 - [rustc now reports the total number of errors on compilation failure][43015]
514 previously this was only the number of errors in the pass that failed.
515 - [Expansion in rustc has been sped up 29x.][42533]
516 - [added `msp430-none-elf` target.][43099]
517 - [rustc will now suggest one-argument enum variant to fix type mismatch when
519 - [Fixes backtraces on Redox][43228]
520 - [rustc now identifies different versions of same crate when absolute paths of
521 different types match in an error message.][42826]
527 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
528 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
530 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
531 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
532 - [Impl `Clone` for `DefaultHasher`.][42799]
533 - [Impl `Sync` for `SyncSender`.][42397]
534 - [Impl `FromStr` for `char`][42271]
535 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
537 - [allow messages in the `unimplemented!()` macro.][42155]
538 ie. `unimplemented!("Waiting for 1.21 to be stable")`
539 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
540 - [Upgrade to Unicode 10.0.0][42999]
541 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
542 - [Skip the main thread's manual stack guard on Linux][43072]
543 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
544 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
546 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
551 - [`CStr::into_c_string`]
552 - [`CString::as_c_str`]
553 - [`CString::into_boxed_c_str`]
556 - [`Chain::into_inner`]
557 - [`Option::get_or_insert_with`]
558 - [`Option::get_or_insert`]
559 - [`OsStr::into_os_string`]
560 - [`OsString::into_boxed_os_str`]
563 - [`Utf8Error::error_len`]
564 - [`char::EscapeDebug`]
565 - [`char::escape_debug`]
571 - [`mem::ManuallyDrop`]
572 - [`slice::sort_unstable_by_key`]
573 - [`slice::sort_unstable_by`]
574 - [`slice::sort_unstable`]
575 - [`str::from_boxed_utf8_unchecked`]
576 - [`str::as_bytes_mut`]
577 - [`str::as_bytes_mut`]
578 - [`str::from_utf8_mut`]
579 - [`str::from_utf8_unchecked_mut`]
581 - [`str::get_unchecked_mut`]
582 - [`str::get_unchecked`]
584 - [`str::into_boxed_bytes`]
589 - [Cargo API token location moved from `~/.cargo/config` to
590 `~/.cargo/credentials`.][cargo/3978]
591 - [Cargo will now build `main.rs` binaries that are in sub-directories of
592 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
593 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
594 - [You can now specify version of a binary when installed through
595 `cargo install` using `--vers`.][cargo/4229]
596 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
597 failure.][cargo/4248]
598 - [Changed the convention around which file is the crate root.][cargo/4259]
599 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
600 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
605 - [Functions with `'static` in their return types will now not be as usable as
606 if they were using lifetime parameters instead.][42417]
607 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
608 takes the sign of NaN into account where previously didn't.][42430]
610 [42033]: https://github.com/rust-lang/rust/pull/42033
611 [42155]: https://github.com/rust-lang/rust/pull/42155
612 [42271]: https://github.com/rust-lang/rust/pull/42271
613 [42397]: https://github.com/rust-lang/rust/pull/42397
614 [42417]: https://github.com/rust-lang/rust/pull/42417
615 [42430]: https://github.com/rust-lang/rust/pull/42430
616 [42431]: https://github.com/rust-lang/rust/pull/42431
617 [42533]: https://github.com/rust-lang/rust/pull/42533
618 [42571]: https://github.com/rust-lang/rust/pull/42571
619 [42613]: https://github.com/rust-lang/rust/pull/42613
620 [42799]: https://github.com/rust-lang/rust/pull/42799
621 [42807]: https://github.com/rust-lang/rust/pull/42807
622 [42809]: https://github.com/rust-lang/rust/pull/42809
623 [42822]: https://github.com/rust-lang/rust/pull/42822
624 [42826]: https://github.com/rust-lang/rust/pull/42826
625 [42854]: https://github.com/rust-lang/rust/pull/42854
626 [42913]: https://github.com/rust-lang/rust/pull/42913
627 [42999]: https://github.com/rust-lang/rust/pull/42999
628 [43011]: https://github.com/rust-lang/rust/pull/43011
629 [43015]: https://github.com/rust-lang/rust/pull/43015
630 [43072]: https://github.com/rust-lang/rust/pull/43072
631 [43077]: https://github.com/rust-lang/rust/pull/43077
632 [43097]: https://github.com/rust-lang/rust/pull/43097
633 [43099]: https://github.com/rust-lang/rust/pull/43099
634 [43170]: https://github.com/rust-lang/rust/pull/43170
635 [43178]: https://github.com/rust-lang/rust/pull/43178
636 [43185]: https://github.com/rust-lang/rust/pull/43185
637 [43228]: https://github.com/rust-lang/rust/pull/43228
638 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
639 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
640 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
641 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
642 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
643 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
644 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
645 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
646 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
647 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
648 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
649 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
650 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
651 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
652 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
653 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
654 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
655 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
656 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
657 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
658 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
659 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
660 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
661 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
662 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
663 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
664 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
665 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
666 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
667 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
668 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
669 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
670 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
671 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
672 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
673 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
674 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
675 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
676 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
679 Version 1.19.0 (2017-07-20)
680 ===========================
685 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
686 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
687 - [Macro recursion limit increased to 1024 from 64.][41676]
688 - [Added lint for detecting unused macros.][41907]
689 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
690 For example: `let x = loop { break 7; };`
691 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
692 contain `Copy` types and cannot have a `Drop` implementation.
693 Example: `union Foo { bar: u8, baz: usize }`
694 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
695 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
700 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
701 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
702 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
703 you should use `--target armv7-linux-androideabi`.
704 - [Fixed ICE when removing a source file between compilation sessions.][41873]
705 - [Minor optimisation of string operations.][42037]
706 - [Compiler error message is now `aborting due to previous error(s)` instead of
707 `aborting due to N previous errors`][42150] This was previously inaccurate and
708 would only count certain kinds of errors.
709 - [The compiler now supports Visual Studio 2017][42225]
710 - [The compiler is now built against LLVM 4.0.1 by default][42948]
711 - [Added a lot][42264] of [new error codes][42302]
712 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
713 libraries with C Run-time Libraries(CRT) to be statically linked.
714 - [Fixed various ARM codegen bugs][42740]
719 - [`String` now implements `FromIterator<Cow<'a, str>>` and
720 `Extend<Cow<'a, str>>`][41449]
721 - [`Vec` now implements `From<&mut [T]>`][41530]
722 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
723 - [`SplitWhitespace` now implements `Clone`][41659]
724 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
726 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
727 macros, but for printing to stderr.
732 - [`OsString::shrink_to_fit`]
735 - [`thread::ThreadId`]
740 - [Build scripts can now add environment variables to the environment
741 the crate is being compiled in.
742 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
743 - [Subcommands now replace the current process rather than spawning a new
744 child process][cargo/3970]
745 - [Workspace members can now accept glob file patterns][cargo/3979]
746 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
747 the members in a given workspace.][cargo/3988]
748 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
749 - [Target directory path is now in the cargo metadata][cargo/4022]
750 - [Cargo no longer checks out a local working directory for the
751 crates.io index][cargo/4026] This should provide smaller file size for the
752 registry, and improve cloning times, especially on Windows machines.
753 - [Added an `--exclude` option for excluding certain packages when using the
754 `--all` option][cargo/4031]
755 - [Cargo will now automatically retry when receiving a 5xx error
756 from crates.io][cargo/4032]
757 - [The `--features` option now accepts multiple comma or space
758 delimited values.][cargo/4084]
759 - [Added support for custom target specific runners][cargo/3954]
764 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
766 - [Rust will now release XZ compressed packages][rust-installer/57]
767 - [rustup will now prefer to download rust packages with
768 XZ compression][rustup/1100] over GZip packages.
769 - [Added the ability to escape `#` in rust documentation][41785] By adding
770 additional `#`'s ie. `##` is now `#`
775 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
776 - [`-Z` flags are now no longer allowed to be used on the stable
777 compiler.][41751] This has been a warning for a year previous to this.
778 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
779 longer works][42844]. Users should migrate to the built-in `check`
780 command, which has been available since 1.16.
781 - [Ending a float literal with `._` is now a hard error.
782 Example: `42._` .][41946]
783 - [Any use of a private `extern crate` outside of its module is now a
784 hard error.][36886] This was previously a warning.
785 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
786 relative while the `::` prefix makes a path absolute, but was ignored and the
787 path was relative regardless.
788 - [Floating point constants in match patterns is now a hard error][36890]
789 This was previously a warning.
790 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
791 match patterns is now a hard error][36891] This was previously a warning.
792 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
794 - [From the pound escape, lines consisting of multiple `#`s are
796 - [It is an error to re-export private enum variants][42460]. This is
797 known to break a number of crates that depend on an older version of
799 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
800 to use it to find the linker, and the build will fail where it did
801 not previously][42607]
803 [36886]: https://github.com/rust-lang/rust/issues/36886
804 [36888]: https://github.com/rust-lang/rust/issues/36888
805 [36890]: https://github.com/rust-lang/rust/issues/36890
806 [36891]: https://github.com/rust-lang/rust/issues/36891
807 [36892]: https://github.com/rust-lang/rust/issues/36892
808 [37406]: https://github.com/rust-lang/rust/issues/37406
809 [39983]: https://github.com/rust-lang/rust/pull/39983
810 [41145]: https://github.com/rust-lang/rust/pull/41145
811 [41192]: https://github.com/rust-lang/rust/pull/41192
812 [41258]: https://github.com/rust-lang/rust/pull/41258
813 [41370]: https://github.com/rust-lang/rust/pull/41370
814 [41449]: https://github.com/rust-lang/rust/pull/41449
815 [41530]: https://github.com/rust-lang/rust/pull/41530
816 [41624]: https://github.com/rust-lang/rust/pull/41624
817 [41656]: https://github.com/rust-lang/rust/pull/41656
818 [41659]: https://github.com/rust-lang/rust/pull/41659
819 [41676]: https://github.com/rust-lang/rust/pull/41676
820 [41751]: https://github.com/rust-lang/rust/pull/41751
821 [41764]: https://github.com/rust-lang/rust/pull/41764
822 [41785]: https://github.com/rust-lang/rust/pull/41785
823 [41873]: https://github.com/rust-lang/rust/pull/41873
824 [41907]: https://github.com/rust-lang/rust/pull/41907
825 [41946]: https://github.com/rust-lang/rust/pull/41946
826 [42016]: https://github.com/rust-lang/rust/pull/42016
827 [42037]: https://github.com/rust-lang/rust/pull/42037
828 [42068]: https://github.com/rust-lang/rust/pull/42068
829 [42150]: https://github.com/rust-lang/rust/pull/42150
830 [42162]: https://github.com/rust-lang/rust/pull/42162
831 [42225]: https://github.com/rust-lang/rust/pull/42225
832 [42264]: https://github.com/rust-lang/rust/pull/42264
833 [42302]: https://github.com/rust-lang/rust/pull/42302
834 [42460]: https://github.com/rust-lang/rust/issues/42460
835 [42607]: https://github.com/rust-lang/rust/issues/42607
836 [42740]: https://github.com/rust-lang/rust/pull/42740
837 [42844]: https://github.com/rust-lang/rust/issues/42844
838 [42948]: https://github.com/rust-lang/rust/pull/42948
839 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
840 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
841 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
842 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
843 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
844 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
845 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
846 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
847 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
848 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
849 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
850 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
851 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
852 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
853 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
854 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
855 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
856 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
857 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
858 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
859 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
860 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
863 Version 1.18.0 (2017-06-08)
864 ===========================
869 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
870 make the item visible to just that module tree. Also accepts the keyword
871 `crate` to make something public to the whole crate but not users of the
872 library. Example: `pub(crate) mod utils;`. [RFC 1422].
873 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
874 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
875 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
876 types like `Write + Send`, trailing `+` are now supported in trait objects,
877 and better error reporting for trait objects starting with `?Sized`.
878 - [0e+10 is now a valid floating point literal][40589]
879 - [Now warns if you bind a lifetime parameter to 'static][40734]
880 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
881 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
882 representation in some cases.][40377]
887 - [rustc can now emit mir with `--emit mir`][39891]
888 - [Improved LLVM IR for trivial functions][40367]
889 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
890 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
891 opportunities found through profiling
892 - [Improved backtrace formatting when panicking][38165]
897 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
898 iterator hasn't been advanced the original `Vec` is reassembled with no actual
899 iteration or reallocation.
900 - [Simplified HashMap Bucket interface][40561] provides performance
901 improvements for iterating and cloning.
902 - [Specialize Vec::from_elem to use calloc][40409]
903 - [Fixed Race condition in fs::create_dir_all][39799]
904 - [No longer caching stdio on Windows][40516]
905 - [Optimized insertion sort in slice][40807] insertion sort in some cases
906 2.50%~ faster and in one case now 12.50% faster.
907 - [Optimized `AtomicBool::fetch_nand`][41143]
912 - [`Child::try_wait`]
913 - [`HashMap::retain`]
914 - [`HashSet::retain`]
916 - [`TcpStream::peek`]
917 - [`UdpSocket::peek`]
918 - [`UdpSocket::peek_from`]
923 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
924 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
925 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
926 - [Added Android build support][cargo/3885]
927 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
928 of a certain type, for example `cargo build --bins` will build all
930 - [Added support for haiku][cargo/3952]
935 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
936 - [Added rust-windbg script for better debugging on Windows][39983]
937 - [Rust now uses the official cross compiler for NetBSD][40612]
938 - [rustdoc now accepts `#` at the start of files][40828]
939 - [Fixed jemalloc support for musl][41168]
944 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
945 always placed after the sign if it exists and before the digits. With the `#`
946 flag the zeroes are placed after the prefix and before the digits.
947 - [Due to the struct field optimisation][40377], using `transmute` on structs
948 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
949 always been undefined behavior, but is now more likely to break in practice.
950 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
951 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
952 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
953 - [Overlapping inherent `impl`s are now a hard error][40728]
954 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
955 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
956 `out.asm` and `out.ll` instead of only one of the filetypes.
957 - [ calling a function that returns `Self` will no longer work][41805] when
958 the size of `Self` cannot be statically determined.
959 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
960 this has caused a few regressions namely:
962 - Changed the link order of local static/dynamic libraries (respecting the
963 order on given rather than having the compiler reorder).
964 - Changed how MinGW is linked, native code linked to dynamic libraries
965 may require manually linking to the gcc support library (for the native
968 [38165]: https://github.com/rust-lang/rust/pull/38165
969 [39799]: https://github.com/rust-lang/rust/pull/39799
970 [39891]: https://github.com/rust-lang/rust/pull/39891
971 [39983]: https://github.com/rust-lang/rust/pull/39983
972 [40043]: https://github.com/rust-lang/rust/pull/40043
973 [40241]: https://github.com/rust-lang/rust/pull/40241
974 [40338]: https://github.com/rust-lang/rust/pull/40338
975 [40367]: https://github.com/rust-lang/rust/pull/40367
976 [40377]: https://github.com/rust-lang/rust/pull/40377
977 [40409]: https://github.com/rust-lang/rust/pull/40409
978 [40516]: https://github.com/rust-lang/rust/pull/40516
979 [40556]: https://github.com/rust-lang/rust/pull/40556
980 [40561]: https://github.com/rust-lang/rust/pull/40561
981 [40589]: https://github.com/rust-lang/rust/pull/40589
982 [40612]: https://github.com/rust-lang/rust/pull/40612
983 [40723]: https://github.com/rust-lang/rust/pull/40723
984 [40728]: https://github.com/rust-lang/rust/pull/40728
985 [40731]: https://github.com/rust-lang/rust/pull/40731
986 [40734]: https://github.com/rust-lang/rust/pull/40734
987 [40805]: https://github.com/rust-lang/rust/pull/40805
988 [40807]: https://github.com/rust-lang/rust/pull/40807
989 [40828]: https://github.com/rust-lang/rust/pull/40828
990 [40870]: https://github.com/rust-lang/rust/pull/40870
991 [41085]: https://github.com/rust-lang/rust/pull/41085
992 [41143]: https://github.com/rust-lang/rust/pull/41143
993 [41168]: https://github.com/rust-lang/rust/pull/41168
994 [41270]: https://github.com/rust-lang/rust/issues/41270
995 [41469]: https://github.com/rust-lang/rust/pull/41469
996 [41805]: https://github.com/rust-lang/rust/issues/41805
997 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
998 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
999 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
1000 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
1001 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
1002 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
1003 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
1004 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
1005 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
1006 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
1007 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
1008 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
1009 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
1010 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
1013 Version 1.17.0 (2017-04-27)
1014 ===========================
1019 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
1020 * [Fields of structs may be initialized without duplicating the field/variable
1021 names][39761]. [RFC 1682]
1022 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
1023 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1024 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
1025 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
1026 `'b`. Soundness fix.
1027 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
1028 * [Static variables may contain references to other statics][40027]
1033 * [Exit quickly on only `--emit dep-info`][40336]
1034 * [Make `-C relocation-model` more correctly determine whether the linker
1035 creates a position-independent executable][40245]
1036 * [Add `-C overflow-checks` to directly control whether integer overflow
1038 * [The rustc type checker now checks items on demand instead of in a single
1039 in-order pass][40008]. This is mostly an internal refactoring in support of
1040 future work, including incremental type checking, but also resolves [RFC
1041 1647], allowing `Self` to appear in `impl` `where` clauses.
1042 * [Optimize vtable loads][39995]
1043 * [Turn off vectorization for Emscripten targets][39990]
1044 * [Provide suggestions for unknown macros imported with `use`][39953]
1045 * [Fix ICEs in path resolution][39939]
1046 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
1047 * [Add clearer error message using `&str + &str`][39116]
1058 * [`Ordering::then`]
1059 * [`Ordering::then_with`]
1060 * [`BTreeMap::range`]
1061 * [`BTreeMap::range_mut`]
1062 * [`collections::Bound`]
1063 * [`process::abort`]
1064 * [`ptr::read_unaligned`]
1065 * [`ptr::write_unaligned`]
1066 * [`Result::expect_err`]
1069 * [`Cell::into_inner`]
1075 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
1076 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
1077 * [`String` implements `FromIterator<&char>`][40028]
1078 * `Box` [implements][40009] a number of new conversions:
1079 `From<Box<str>> for String`,
1080 `From<Box<[T]>> for Vec<T>`,
1081 `From<Box<CStr>> for CString`,
1082 `From<Box<OsStr>> for OsString`,
1083 `From<Box<Path>> for PathBuf`,
1084 `Into<Box<str>> for String`,
1085 `Into<Box<[T]>> for Vec<T>`,
1086 `Into<Box<CStr>> for CString`,
1087 `Into<Box<OsStr>> for OsString`,
1088 `Into<Box<Path>> for PathBuf`,
1089 `Default for Box<str>`,
1090 `Default for Box<CStr>`,
1091 `Default for Box<OsStr>`,
1092 `From<&CStr> for Box<CStr>`,
1093 `From<&OsStr> for Box<OsStr>`,
1094 `From<&Path> for Box<Path>`
1095 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
1096 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
1097 * [Slightly optimize `slice::sort`][39538]
1098 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
1099 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
1100 `Box<str>` implements `From<&str>`][39438]
1101 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
1102 `From<(I, u16)> where I: Into<IpAddr>`][39372]
1103 * [`format!` estimates the needed capacity before writing a string][39356]
1104 * [Support unprivileged symlink creation in Windows][38921]
1105 * [`PathBuf` implements `Default`][38764]
1106 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
1107 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
1108 and poor hash functions.
1113 * [Add `cargo check --all`][cargo/3731]
1114 * [Add an option to ignore SSL revocation checking][cargo/3699]
1115 * [Add `cargo run --package`][cargo/3691]
1116 * [Add `required_features`][cargo/3667]
1117 * [Assume `build.rs` is a build script][cargo/3664]
1118 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
1123 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
1125 * [The "Unstable Book" documents nightly-only features][ubook]
1126 * [Improve the style of the sidebar in rustdoc output][40265]
1127 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
1128 * [Fix MSP430 breakage due to `i128`][40257]
1129 * [Preliminary Solaris/SPARCv9 support][39903]
1130 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
1131 run without installing the MSVC runtime.
1132 * [`rustdoc --test` includes file names in test names][39788]
1133 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
1134 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
1135 * [Initial support for `aarch64-unknown-freebsd`][39491]
1136 * [Initial support for `i686-unknown-netbsd`][39426]
1137 * [This release no longer includes the old makefile build system][39431]. Rust
1138 is built with a custom build system, written in Rust, and with Cargo.
1139 * [Add Debug implementations for libcollection structs][39002]
1140 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
1141 * [`--test-threads=0` produces an error][38945]
1142 * [`rustup` installs documentation by default][40526]
1143 * [The Rust source includes NatVis visualizations][39843]. These can be used by
1144 WinDbg and Visual Studio to improve the debugging experience.
1149 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
1150 workaround, either use MSVC 2015 or run vcvars.bat.
1151 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1152 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
1153 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
1155 * [`format!` and `Display::to_string` panic if an underlying formatting
1156 implementation returns an error][40117]. Previously the error was silently
1157 ignored. It is incorrect for `write_fmt` to return an error when writing
1159 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
1160 crates were marked stable and could be accessed from the stable toolchain.
1161 * [Rust git source no longer includes vendored crates][39728]. Those that need
1162 to build with vendored crates should build from release tarballs.
1163 * [Fix inert attributes from `proc_macro_derives`][39572]
1164 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
1165 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
1167 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
1168 existing code generally ignores the type of dead-code unless a type-hint is
1169 provided; this can cause surprising inference interactions particularly around
1170 defaulting. The new code uniformly ignores the result type of dead-code.
1171 * [Tuple-struct constructors with private fields are no longer visible][38932]
1172 * [Lifetime parameters that do not appear in the arguments are now considered
1173 early-bound][38897], resolving a soundness bug (#[32330]). The
1174 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
1176 * [rustdoc: fix doctests with non-feature crate attributes][38161]
1177 * [Make transmuting from fn item types to pointer-sized types a hard
1180 [27787]: https://github.com/rust-lang/rust/issues/27787
1181 [32330]: https://github.com/rust-lang/rust/issues/32330
1182 [34198]: https://github.com/rust-lang/rust/pull/34198
1183 [38161]: https://github.com/rust-lang/rust/pull/38161
1184 [38368]: https://github.com/rust-lang/rust/pull/38368
1185 [38584]: https://github.com/rust-lang/rust/issues/38584
1186 [38661]: https://github.com/rust-lang/rust/pull/38661
1187 [38764]: https://github.com/rust-lang/rust/pull/38764
1188 [38864]: https://github.com/rust-lang/rust/issues/38864
1189 [38897]: https://github.com/rust-lang/rust/pull/38897
1190 [38921]: https://github.com/rust-lang/rust/pull/38921
1191 [38932]: https://github.com/rust-lang/rust/pull/38932
1192 [38945]: https://github.com/rust-lang/rust/pull/38945
1193 [38981]: https://github.com/rust-lang/rust/pull/38981
1194 [39002]: https://github.com/rust-lang/rust/pull/39002
1195 [39116]: https://github.com/rust-lang/rust/pull/39116
1196 [39193]: https://github.com/rust-lang/rust/pull/39193
1197 [39265]: https://github.com/rust-lang/rust/pull/39265
1198 [39356]: https://github.com/rust-lang/rust/pull/39356
1199 [39372]: https://github.com/rust-lang/rust/pull/39372
1200 [39426]: https://github.com/rust-lang/rust/pull/39426
1201 [39431]: https://github.com/rust-lang/rust/pull/39431
1202 [39438]: https://github.com/rust-lang/rust/pull/39438
1203 [39440]: https://github.com/rust-lang/rust/pull/39440
1204 [39485]: https://github.com/rust-lang/rust/pull/39485
1205 [39491]: https://github.com/rust-lang/rust/pull/39491
1206 [39518]: https://github.com/rust-lang/rust/pull/39518
1207 [39538]: https://github.com/rust-lang/rust/pull/39538
1208 [39572]: https://github.com/rust-lang/rust/pull/39572
1209 [39633]: https://github.com/rust-lang/rust/pull/39633
1210 [39642]: https://github.com/rust-lang/rust/pull/39642
1211 [39728]: https://github.com/rust-lang/rust/pull/39728
1212 [39761]: https://github.com/rust-lang/rust/pull/39761
1213 [39788]: https://github.com/rust-lang/rust/pull/39788
1214 [39793]: https://github.com/rust-lang/rust/pull/39793
1215 [39837]: https://github.com/rust-lang/rust/pull/39837
1216 [39843]: https://github.com/rust-lang/rust/pull/39843
1217 [39851]: https://github.com/rust-lang/rust/pull/39851
1218 [39903]: https://github.com/rust-lang/rust/pull/39903
1219 [39939]: https://github.com/rust-lang/rust/pull/39939
1220 [39953]: https://github.com/rust-lang/rust/pull/39953
1221 [39960]: https://github.com/rust-lang/rust/pull/39960
1222 [39990]: https://github.com/rust-lang/rust/pull/39990
1223 [39995]: https://github.com/rust-lang/rust/pull/39995
1224 [40008]: https://github.com/rust-lang/rust/pull/40008
1225 [40009]: https://github.com/rust-lang/rust/pull/40009
1226 [40027]: https://github.com/rust-lang/rust/pull/40027
1227 [40028]: https://github.com/rust-lang/rust/pull/40028
1228 [40037]: https://github.com/rust-lang/rust/pull/40037
1229 [40117]: https://github.com/rust-lang/rust/pull/40117
1230 [40166]: https://github.com/rust-lang/rust/pull/40166
1231 [40245]: https://github.com/rust-lang/rust/pull/40245
1232 [40257]: https://github.com/rust-lang/rust/pull/40257
1233 [40261]: https://github.com/rust-lang/rust/pull/40261
1234 [40265]: https://github.com/rust-lang/rust/pull/40265
1235 [40319]: https://github.com/rust-lang/rust/pull/40319
1236 [40336]: https://github.com/rust-lang/rust/pull/40336
1237 [40526]: https://github.com/rust-lang/rust/pull/40526
1238 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1239 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
1240 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
1241 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
1242 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
1243 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
1244 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
1245 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
1246 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
1247 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
1248 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
1249 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
1250 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
1251 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
1252 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
1253 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
1254 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
1255 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
1256 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
1257 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
1258 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
1259 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
1260 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
1261 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
1262 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
1263 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
1264 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
1265 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
1266 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
1267 [mdbook]: https://crates.io/crates/mdbook
1268 [ubook]: https://doc.rust-lang.org/unstable-book/
1271 Version 1.16.0 (2017-03-16)
1272 ===========================
1277 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1278 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1279 match patterns][38069]
1280 * [Clean up semantics of `self` in an import list][38313]
1281 * [`Self` may appear in `impl` headers][38920]
1282 * [`Self` may appear in struct expressions][39282]
1287 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
1288 a `.rmeta` file containing only crate metadata][38571]. This can be
1289 used by tools like the Rust Language Service to perform
1290 metadata-only builds.
1291 * [Levenshtein based typo suggestions now work in most places, while
1292 previously they worked only for fields and sometimes for local
1293 variables][38927]. Together with the overhaul of "no
1294 resolution"/"unexpected resolution" errors (#[38154]) they result in
1295 large and systematic improvement in resolution diagnostics.
1296 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
1298 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
1299 * [`rustc` no longer attempts to provide "consider using an explicit
1300 lifetime" suggestions][37057]. They were inaccurate.
1305 * [`VecDeque::truncate`]
1306 * [`VecDeque::resize`]
1307 * [`String::insert_str`]
1308 * [`Duration::checked_add`]
1309 * [`Duration::checked_sub`]
1310 * [`Duration::checked_div`]
1311 * [`Duration::checked_mul`]
1314 * [`SocketAddr::is_ipv4`]
1315 * [`SocketAddr::is_ipv6`]
1316 * [`IpAddr::is_ipv4`]
1317 * [`IpAddr::is_ipv6`]
1319 * [`Vec::dedup_by_key`]
1320 * [`Result::unwrap_or_default`]
1321 * [`<*const T>::wrapping_offset`]
1322 * [`<*mut T>::wrapping_offset`]
1323 * `CommandExt::creation_flags`
1324 * [`File::set_permissions`]
1325 * [`String::split_off`]
1330 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
1331 their argument by `Borrow` parameter][37761]
1332 * [All public types in std implement `Debug`][38006]
1333 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
1334 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
1335 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1337 * [std: Fix partial writes in `LineWriter`][38062]
1338 * [std: Clamp max read/write sizes on Unix][38062]
1339 * [Use more specific panic message for `&str` slicing errors][38066]
1340 * [`TcpListener::set_only_v6` is deprecated][38304]. This
1341 functionality cannot be achieved in std currently.
1342 * [`writeln!`, like `println!`, now accepts a form with no string
1343 or formatting arguments, to just print a newline][38469]
1344 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
1345 * [Reduce the size of static data in `std_unicode::tables`][38781]
1346 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
1347 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
1349 * [`Duration` implements `Sum`][38712]
1350 * [`String` implements `ToSocketAddrs`][39048]
1355 * [The `cargo check` command does a type check of a project without
1356 building it][cargo/3296]
1357 * [crates.io will display CI badges from Travis and AppVeyor, if
1358 specified in Cargo.toml][cargo/3546]
1359 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
1360 * [Compilation profiles accept integer values for `debug`, in addition
1361 to `true` and `false`. These are passed to `rustc` as the value to
1362 `-C debuginfo`][cargo/3534]
1363 * [Implement `cargo --version --verbose`][cargo/3604]
1364 * [All builds now output 'dep-info' build dependencies compatible with
1365 make and ninja][cargo/3557]
1366 * [Build all workspace members with `build --all`][cargo/3511]
1367 * [Document all workspace members with `doc --all`][cargo/3515]
1368 * [Path deps outside workspace are not members][cargo/3443]
1373 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
1374 the path to the Rust implementation][38589]
1375 * [The `armv7-linux-androideabi` target no longer enables NEON
1376 extensions, per Google's ABI guide][38413]
1377 * [The stock standard library can be compiled for Redox OS][38401]
1378 * [Rust has initial SPARC support][38726]. Tier 3. No builds
1380 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
1382 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
1387 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1388 match patterns][38069]
1389 * In this release, references to uninhabited types can not be
1390 pattern-matched. This was accidentally allowed in 1.15.
1391 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1392 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1394 * [Clean up semantics of `self` in an import list][38313]
1395 * Reimplemented lifetime elision. This change was almost entirely compatible
1396 with existing code, but it did close a number of small bugs and loopholes,
1397 as well as being more accepting in some other [cases][41105].
1399 [37057]: https://github.com/rust-lang/rust/pull/37057
1400 [37761]: https://github.com/rust-lang/rust/pull/37761
1401 [38006]: https://github.com/rust-lang/rust/pull/38006
1402 [38051]: https://github.com/rust-lang/rust/pull/38051
1403 [38062]: https://github.com/rust-lang/rust/pull/38062
1404 [38062]: https://github.com/rust-lang/rust/pull/38622
1405 [38066]: https://github.com/rust-lang/rust/pull/38066
1406 [38069]: https://github.com/rust-lang/rust/pull/38069
1407 [38131]: https://github.com/rust-lang/rust/pull/38131
1408 [38154]: https://github.com/rust-lang/rust/pull/38154
1409 [38274]: https://github.com/rust-lang/rust/pull/38274
1410 [38304]: https://github.com/rust-lang/rust/pull/38304
1411 [38313]: https://github.com/rust-lang/rust/pull/38313
1412 [38314]: https://github.com/rust-lang/rust/pull/38314
1413 [38327]: https://github.com/rust-lang/rust/pull/38327
1414 [38401]: https://github.com/rust-lang/rust/pull/38401
1415 [38413]: https://github.com/rust-lang/rust/pull/38413
1416 [38469]: https://github.com/rust-lang/rust/pull/38469
1417 [38559]: https://github.com/rust-lang/rust/pull/38559
1418 [38571]: https://github.com/rust-lang/rust/pull/38571
1419 [38580]: https://github.com/rust-lang/rust/pull/38580
1420 [38589]: https://github.com/rust-lang/rust/pull/38589
1421 [38670]: https://github.com/rust-lang/rust/pull/38670
1422 [38712]: https://github.com/rust-lang/rust/pull/38712
1423 [38726]: https://github.com/rust-lang/rust/pull/38726
1424 [38781]: https://github.com/rust-lang/rust/pull/38781
1425 [38798]: https://github.com/rust-lang/rust/pull/38798
1426 [38909]: https://github.com/rust-lang/rust/pull/38909
1427 [38920]: https://github.com/rust-lang/rust/pull/38920
1428 [38927]: https://github.com/rust-lang/rust/pull/38927
1429 [39048]: https://github.com/rust-lang/rust/pull/39048
1430 [39282]: https://github.com/rust-lang/rust/pull/39282
1431 [39379]: https://github.com/rust-lang/rust/pull/39379
1432 [41105]: https://github.com/rust-lang/rust/issues/41105
1433 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1434 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1435 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
1436 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
1437 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
1438 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
1439 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
1440 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
1441 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
1442 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
1443 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
1444 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
1445 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
1446 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
1447 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
1448 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
1449 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
1450 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
1451 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
1452 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
1453 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
1454 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
1455 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
1456 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
1457 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
1458 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
1459 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
1460 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
1461 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
1462 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1465 Version 1.15.1 (2017-02-09)
1466 ===========================
1468 * [Fix IntoIter::as_mut_slice's signature][39466]
1469 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
1471 [39466]: https://github.com/rust-lang/rust/pull/39466
1472 [39523]: https://github.com/rust-lang/rust/pull/39523
1475 Version 1.15.0 (2017-02-02)
1476 ===========================
1481 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
1482 stable. This allows popular code-generating crates like Serde and Diesel to
1483 work ergonomically. [RFC 1681].
1484 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
1485 with curly braces][36868]. Part of [RFC 1506].
1486 * [A number of minor changes to name resolution have been activated][37127].
1487 They add up to more consistent semantics, allowing for future evolution of
1488 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1489 details of what is different. The breaking changes here have been transitioned
1490 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1491 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
1493 * [`?Sized` can be used in `where` clauses][37791]
1494 * [There is now a limit on the size of monomorphized types and it can be
1495 modified with the `#![type_size_limit]` crate attribute, similarly to
1496 the `#![recursion_limit]` attribute][37789]
1501 * [On Windows, the compiler will apply dllimport attributes when linking to
1502 extern functions][37973]. Additional attributes and flags can control which
1503 library kind is linked and its name. [RFC 1717].
1504 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1505 * [The `--test` flag works with procedural macro crates][38107]
1506 * [Fix `extern "aapcs" fn` ABI][37814]
1507 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
1508 * [The `format!` expander recognizes incorrect `printf` and shell-style
1509 formatting directives and suggests the correct format][37613].
1510 * [Only report one error for all unused imports in an import list][37456]
1512 Compiler Performance
1513 --------------------
1515 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
1516 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
1517 * [Don't clone in `UnificationTable::probe`][37848]
1518 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
1519 * [Use small vectors in type walker][37760]
1520 * [Macro expansion performance was improved][37701]
1521 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
1522 * [Replace FNV with a faster hash function][37229]
1527 * [`std::iter::Iterator::min_by`]
1528 * [`std::iter::Iterator::max_by`]
1529 * [`std::os::*::fs::FileExt`]
1530 * [`std::sync::atomic::Atomic*::get_mut`]
1531 * [`std::sync::atomic::Atomic*::into_inner`]
1532 * [`std::vec::IntoIter::as_slice`]
1533 * [`std::vec::IntoIter::as_mut_slice`]
1534 * [`std::sync::mpsc::Receiver::try_iter`]
1535 * [`std::os::unix::process::CommandExt::before_exec`]
1536 * [`std::rc::Rc::strong_count`]
1537 * [`std::rc::Rc::weak_count`]
1538 * [`std::sync::Arc::strong_count`]
1539 * [`std::sync::Arc::weak_count`]
1540 * [`std::char::encode_utf8`]
1541 * [`std::char::encode_utf16`]
1542 * [`std::cell::Ref::clone`]
1543 * [`std::io::Take::into_inner`]
1548 * [The standard sorting algorithm has been rewritten for dramatic performance
1549 improvements][38192]. It is a hybrid merge sort, drawing influences from
1550 Timsort. Previously it was a naive merge sort.
1551 * [`Iterator::nth` no longer has a `Sized` bound][38134]
1552 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
1554 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
1555 and `char_indices().last()`][37882]
1556 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
1557 * [Chinese characters display correctly in `fmt::Debug`][37855]
1558 * [Derive `Default` for `Duration`][37699]
1559 * [Support creation of anonymous pipes on WinXP/2k][37677]
1560 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
1561 * [Don't pass overlapped handles to processes][38835]
1566 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1567 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1568 should instead check the variable at runtime with `std::env`. That the value
1569 was set at build time was a bug, and incorrect when cross-compiling. This
1570 change is known to cause breakage.
1571 * [Add `--all` flag to `cargo test`][cargo/3221]
1572 * [Compile statically against the MSVC CRT][cargo/3363]
1573 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
1574 * [Link OpenSSL statically on OSX][cargo/3311]
1575 * [Apply new fingerprinting to build dir outputs][cargo/3310]
1576 * [Test for bad path overrides with summaries][cargo/3336]
1577 * [Require `cargo install --vers` to take a semver version][cargo/3338]
1578 * [Fix retrying crate downloads for network errors][cargo/3348]
1579 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
1580 * [Emit more info on --message-format=json][cargo/3319]
1581 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
1582 * [Don't ignore errors in workspace manifest][cargo/3409]
1583 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
1588 * [Test runners (binaries built with `--test`) now support a `--list` argument
1589 that lists the tests it contains][38185]
1590 * [Test runners now support a `--exact` argument that makes the test filter
1591 match exactly, instead of matching only a substring of the test name][38181]
1592 * [rustdoc supports a `--playground-url` flag][37763]
1593 * [rustdoc provides more details about `#[should_panic]` errors][37749]
1598 * [The Rust build system is now written in Rust][37817]. The Makefiles may
1599 continue to be used in this release by passing `--disable-rustbuild` to the
1600 configure script, but they will be deleted soon. Note that the new build
1601 system uses a different on-disk layout that will likely affect any scripts
1603 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
1605 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
1606 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
1612 * [A number of minor changes to name resolution have been activated][37127].
1613 They add up to more consistent semantics, allowing for future evolution of
1614 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1615 details of what is different. The breaking changes here have been transitioned
1616 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1617 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1618 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1619 should instead check the variable at runtime with `std::env`. That the value
1620 was set at build time was a bug, and incorrect when cross-compiling. This
1621 change is known to cause breakage.
1622 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
1623 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
1624 1.10 and is now an error by default. It will become a hard error in the near
1626 * [The semantics relating modules to file system directories are changing in
1627 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
1628 lint, which is a warning in this release, and will become a hard error in the
1630 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1631 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
1632 the underlying iterator][37834]
1634 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
1635 [33685]: https://github.com/rust-lang/rust/issues/33685
1636 [36868]: https://github.com/rust-lang/rust/pull/36868
1637 [37127]: https://github.com/rust-lang/rust/pull/37127
1638 [37229]: https://github.com/rust-lang/rust/pull/37229
1639 [37456]: https://github.com/rust-lang/rust/pull/37456
1640 [37527]: https://github.com/rust-lang/rust/pull/37527
1641 [37602]: https://github.com/rust-lang/rust/pull/37602
1642 [37613]: https://github.com/rust-lang/rust/pull/37613
1643 [37615]: https://github.com/rust-lang/rust/pull/37615
1644 [37636]: https://github.com/rust-lang/rust/pull/37636
1645 [37627]: https://github.com/rust-lang/rust/pull/37627
1646 [37642]: https://github.com/rust-lang/rust/pull/37642
1647 [37677]: https://github.com/rust-lang/rust/pull/37677
1648 [37699]: https://github.com/rust-lang/rust/pull/37699
1649 [37701]: https://github.com/rust-lang/rust/pull/37701
1650 [37705]: https://github.com/rust-lang/rust/pull/37705
1651 [37749]: https://github.com/rust-lang/rust/pull/37749
1652 [37760]: https://github.com/rust-lang/rust/pull/37760
1653 [37763]: https://github.com/rust-lang/rust/pull/37763
1654 [37764]: https://github.com/rust-lang/rust/pull/37764
1655 [37789]: https://github.com/rust-lang/rust/pull/37789
1656 [37791]: https://github.com/rust-lang/rust/pull/37791
1657 [37814]: https://github.com/rust-lang/rust/pull/37814
1658 [37817]: https://github.com/rust-lang/rust/pull/37817
1659 [37834]: https://github.com/rust-lang/rust/pull/37834
1660 [37848]: https://github.com/rust-lang/rust/pull/37848
1661 [37855]: https://github.com/rust-lang/rust/pull/37855
1662 [37882]: https://github.com/rust-lang/rust/pull/37882
1663 [37888]: https://github.com/rust-lang/rust/pull/37888
1664 [37973]: https://github.com/rust-lang/rust/pull/37973
1665 [37979]: https://github.com/rust-lang/rust/pull/37979
1666 [38086]: https://github.com/rust-lang/rust/pull/38086
1667 [38107]: https://github.com/rust-lang/rust/pull/38107
1668 [38117]: https://github.com/rust-lang/rust/pull/38117
1669 [38134]: https://github.com/rust-lang/rust/pull/38134
1670 [38146]: https://github.com/rust-lang/rust/pull/38146
1671 [38181]: https://github.com/rust-lang/rust/pull/38181
1672 [38182]: https://github.com/rust-lang/rust/pull/38182
1673 [38185]: https://github.com/rust-lang/rust/pull/38185
1674 [38192]: https://github.com/rust-lang/rust/pull/38192
1675 [38279]: https://github.com/rust-lang/rust/pull/38279
1676 [38835]: https://github.com/rust-lang/rust/pull/38835
1677 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
1678 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
1679 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
1680 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
1681 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
1682 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
1683 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
1684 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
1685 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
1686 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
1687 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
1688 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
1689 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
1690 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
1691 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
1692 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
1693 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
1694 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
1695 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
1696 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
1697 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
1698 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
1699 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
1700 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
1701 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
1702 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
1703 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
1704 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
1705 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
1706 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
1707 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
1708 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
1709 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
1710 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
1711 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
1712 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
1713 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
1714 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
1717 Version 1.14.0 (2016-12-22)
1718 ===========================
1723 * [`..` matches multiple tuple fields in enum variants, structs
1724 and tuples][36843]. [RFC 1492].
1725 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
1726 * [`use *` and `use ::*` both glob-import from the crate root][37367]
1727 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
1728 dereferencing][36822]
1733 * [Mark enums with non-zero discriminant as non-zero][37224]
1734 * [Lower-case `static mut` names are linted like other
1735 statics and consts][37162]
1736 * [Fix ICE on some macros in const integer positions
1737 (e.g. `[u8; m!()]`)][36819]
1738 * [Improve error message and snippet for "did you mean `x`"][36798]
1739 * [Add a panic-strategy field to the target specification][36794]
1740 * [Include LLVM version in `--version --verbose`][37200]
1742 Compile-time Optimizations
1743 --------------------------
1745 * [Improve macro expansion performance][37569]
1746 * [Shrink `Expr_::ExprInlineAsm`][37445]
1747 * [Replace all uses of SHA-256 with BLAKE2b][37439]
1748 * [Reduce the number of bytes hashed by `IchHasher`][37427]
1749 * [Avoid more allocations when compiling html5ever][37373]
1750 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
1751 * [Avoid some allocations in the macro parser][37318]
1752 * [Use a faster deflate setting][37298]
1753 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
1754 during interning of slices][37270]
1755 * [Optimize `write_metadata`][37267]
1756 * [Don't process obligation forest cycles when stalled][37231]
1757 * [Avoid many `CrateConfig` clones][37161]
1758 * [Optimize `Substs::super_fold_with`][37108]
1759 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
1760 * [Speed up `plug_leaks`][36917]
1765 * [`println!()`, with no arguments, prints newline][36825].
1766 Previously, an empty string was required to achieve the same.
1767 * [`Wrapping` impls standard binary and unary operators, as well as
1768 the `Sum` and `Product` iterators][37356]
1769 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
1771 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
1772 `VecDeque` iterators][37315]
1773 * [Improve `SipHasher` performance on small values][37312]
1774 * [Add Iterator trait TrustedLen to enable better FromIterator /
1776 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
1777 * [`ReadDir` implements `Debug`][37221]
1778 * [Implement `RefUnwindSafe` for atomic types][37178]
1779 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
1780 * [Avoid allocations in `Decoder::read_str`][37064]
1781 * [`io::Error` implements `From<io::ErrorKind>`][37037]
1782 * [Impl `Debug` for raw pointers to unsized data][36880]
1783 * [Don't reuse `HashMap` random seeds][37470]
1784 * [The internal memory layout of `HashMap` is more cache-friendly, for
1785 significant improvements in some operations][36692]
1786 * [`HashMap` uses less memory on 32-bit architectures][36595]
1787 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
1792 * [Expose rustc cfg values to build scripts][cargo/3243]
1793 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
1794 * [Fix passing --features when testing multiple packages][cargo/3280]
1795 * [Use a single profile set per workspace][cargo/3249]
1796 * [Load `replace` sections from lock files][cargo/3220]
1797 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
1802 * [rustup is the recommended Rust installation method][1.14rustup]
1803 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
1804 S390x. These are [tier 2] platforms and may have major defects. Follow the
1805 instructions on the website to install, or add the targets to an existing
1806 installation with `rustup target add`. The new target triples are:
1807 - `mips-unknown-linux-gnu`
1808 - `mipsel-unknown-linux-gnu`
1809 - `mips64-unknown-linux-gnuabi64`
1810 - `mips64el-unknown-linux-gnuabi64 `
1811 - `powerpc-unknown-linux-gnu`
1812 - `powerpc64-unknown-linux-gnu`
1813 - `powerpc64le-unknown-linux-gnu`
1814 - `s390x-unknown-linux-gnu `
1815 * This release includes target (std) builds for ARM Linux running MUSL
1816 libc. These are [tier 2] platforms and may have major defects. Add the
1817 following triples to an existing rustup installation with `rustup target add`:
1818 - `arm-unknown-linux-musleabi`
1819 - `arm-unknown-linux-musleabihf`
1820 - `armv7-unknown-linux-musleabihf`
1821 * This release includes [experimental support for WebAssembly][1.14wasm], via
1822 the `wasm32-unknown-emscripten` target. This target is known to have major
1823 defects. Please test, report, and fix.
1824 * rustup no longer installs documentation by default. Run `rustup
1825 component add rust-docs` to install.
1826 * [Fix line stepping in debugger][37310]
1827 * [Enable line number debuginfo in releases][37280]
1832 * [Disable jemalloc on aarch64/powerpc/mips][37392]
1833 * [Add support for Fuchsia OS][37313]
1834 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
1839 * [A number of forward-compatibility lints used by the compiler
1840 to gradually introduce language changes have been converted
1841 to deny by default][36894]:
1842 - ["use of inaccessible extern crate erroneously allowed"][36886]
1843 - ["type parameter default erroneously allowed in invalid location"][36887]
1844 - ["detects super or self keywords at the beginning of global path"][36888]
1845 - ["two overlapping inherent impls define an item with the same name
1846 were erroneously allowed"][36889]
1847 - ["floating-point constants cannot be used in patterns"][36890]
1848 - ["constants of struct or enum type can only be used in a pattern if
1849 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
1850 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
1851 * [Prohibit patterns in trait methods without bodies][37378]
1852 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
1853 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
1854 * [The `$crate` macro variable is accepted in fewer locations][37213]
1855 * [Impls specifying extra region requirements beyond the trait
1856 they implement are rejected][37167]
1857 * [Enums may not be unsized][37111]. Unsized enums are intended to
1858 work but never have. For now they are forbidden.
1859 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
1861 [tier 2]: https://forge.rust-lang.org/platform-support.html
1862 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
1863 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
1864 [36430]: https://github.com/rust-lang/rust/pull/36430
1865 [36595]: https://github.com/rust-lang/rust/pull/36595
1866 [36595]: https://github.com/rust-lang/rust/pull/36595
1867 [36692]: https://github.com/rust-lang/rust/pull/36692
1868 [36767]: https://github.com/rust-lang/rust/pull/36767
1869 [36794]: https://github.com/rust-lang/rust/pull/36794
1870 [36798]: https://github.com/rust-lang/rust/pull/36798
1871 [36819]: https://github.com/rust-lang/rust/pull/36819
1872 [36822]: https://github.com/rust-lang/rust/pull/36822
1873 [36825]: https://github.com/rust-lang/rust/pull/36825
1874 [36843]: https://github.com/rust-lang/rust/pull/36843
1875 [36880]: https://github.com/rust-lang/rust/pull/36880
1876 [36886]: https://github.com/rust-lang/rust/issues/36886
1877 [36887]: https://github.com/rust-lang/rust/issues/36887
1878 [36888]: https://github.com/rust-lang/rust/issues/36888
1879 [36889]: https://github.com/rust-lang/rust/issues/36889
1880 [36890]: https://github.com/rust-lang/rust/issues/36890
1881 [36891]: https://github.com/rust-lang/rust/issues/36891
1882 [36892]: https://github.com/rust-lang/rust/issues/36892
1883 [36894]: https://github.com/rust-lang/rust/pull/36894
1884 [36917]: https://github.com/rust-lang/rust/pull/36917
1885 [36993]: https://github.com/rust-lang/rust/pull/36993
1886 [37037]: https://github.com/rust-lang/rust/pull/37037
1887 [37064]: https://github.com/rust-lang/rust/pull/37064
1888 [37094]: https://github.com/rust-lang/rust/pull/37094
1889 [37108]: https://github.com/rust-lang/rust/pull/37108
1890 [37111]: https://github.com/rust-lang/rust/pull/37111
1891 [37161]: https://github.com/rust-lang/rust/pull/37161
1892 [37162]: https://github.com/rust-lang/rust/pull/37162
1893 [37167]: https://github.com/rust-lang/rust/pull/37167
1894 [37178]: https://github.com/rust-lang/rust/pull/37178
1895 [37200]: https://github.com/rust-lang/rust/pull/37200
1896 [37213]: https://github.com/rust-lang/rust/pull/37213
1897 [37221]: https://github.com/rust-lang/rust/pull/37221
1898 [37224]: https://github.com/rust-lang/rust/pull/37224
1899 [37230]: https://github.com/rust-lang/rust/pull/37230
1900 [37231]: https://github.com/rust-lang/rust/pull/37231
1901 [37247]: https://github.com/rust-lang/rust/pull/37247
1902 [37267]: https://github.com/rust-lang/rust/pull/37267
1903 [37270]: https://github.com/rust-lang/rust/pull/37270
1904 [37273]: https://github.com/rust-lang/rust/pull/37273
1905 [37280]: https://github.com/rust-lang/rust/pull/37280
1906 [37298]: https://github.com/rust-lang/rust/pull/37298
1907 [37306]: https://github.com/rust-lang/rust/pull/37306
1908 [37310]: https://github.com/rust-lang/rust/pull/37310
1909 [37312]: https://github.com/rust-lang/rust/pull/37312
1910 [37313]: https://github.com/rust-lang/rust/pull/37313
1911 [37315]: https://github.com/rust-lang/rust/pull/37315
1912 [37318]: https://github.com/rust-lang/rust/pull/37318
1913 [37322]: https://github.com/rust-lang/rust/pull/37322
1914 [37326]: https://github.com/rust-lang/rust/pull/37326
1915 [37351]: https://github.com/rust-lang/rust/pull/37351
1916 [37356]: https://github.com/rust-lang/rust/pull/37356
1917 [37367]: https://github.com/rust-lang/rust/pull/37367
1918 [37373]: https://github.com/rust-lang/rust/pull/37373
1919 [37378]: https://github.com/rust-lang/rust/pull/37378
1920 [37389]: https://github.com/rust-lang/rust/pull/37389
1921 [37392]: https://github.com/rust-lang/rust/pull/37392
1922 [37427]: https://github.com/rust-lang/rust/pull/37427
1923 [37439]: https://github.com/rust-lang/rust/pull/37439
1924 [37445]: https://github.com/rust-lang/rust/pull/37445
1925 [37470]: https://github.com/rust-lang/rust/pull/37470
1926 [37569]: https://github.com/rust-lang/rust/pull/37569
1927 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
1928 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
1929 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
1930 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
1931 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
1932 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
1933 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
1936 Version 1.13.0 (2016-11-10)
1937 ===========================
1942 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
1943 errors, like the `try!` macro, described in [RFC 0243].
1944 * [Stabilize macros in type position][36014]. Described in [RFC 873].
1945 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
1946 * [Fix `#[derive]` for empty tuple structs/variants][35728]
1947 * [Fix lifetime rules for 'if' conditions][36029]
1948 * [Avoid loading and parsing unconfigured non-inline modules][36482]
1953 * [Add the `-C link-arg` argument][36574]
1954 * [Remove the old AST-based backend from rustc_trans][35764]
1955 * [Don't enable NEON by default on armv7 Linux][35814]
1956 * [Fix debug line number info for macro expansions][35238]
1957 * [Do not emit "class method" debuginfo for types that are not
1958 DICompositeType][36008]
1959 * [Warn about multiple conflicting #[repr] hints][34623]
1960 * [When sizing DST, don't double-count nested struct prefixes][36351]
1961 * [Default RUST_MIN_STACK to 16MiB for now][36505]
1962 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
1963 * [Reject macros with empty repetitions to avoid infinite loop][36721]
1964 * [Expand macros without recursing to avoid stack overflows][36214]
1969 * [Replace macro backtraces with labeled local uses][35702]
1970 * [Improve error message for misplaced doc comments][33922]
1971 * [Buffer unix and lock windows to prevent message interleaving][35975]
1972 * [Update lifetime errors to specifically note temporaries][36171]
1973 * [Special case a few colors for Windows][36178]
1974 * [Suggest `use self` when such an import resolves][36289]
1975 * [Be more specific when type parameter shadows primitive type][36338]
1976 * Many minor improvements
1978 Compile-time Optimizations
1979 --------------------------
1981 * [Compute and cache HIR hashes at beginning][35854]
1982 * [Don't hash types in loan paths][36004]
1983 * [Cache projections in trans][35761]
1984 * [Optimize the parser's last token handling][36527]
1985 * [Only instantiate #[inline] functions in codegen units referencing
1986 them][36524]. This leads to big improvements in cases where crates export
1987 define many inline functions without using them directly.
1988 * [Lazily allocate TypedArena's first chunk][36592]
1989 * [Don't allocate during default HashSet creation][36734]
1996 * [`overflowing_abs`]
1997 * [`RefCell::try_borrow`]
1998 * [`RefCell::try_borrow_mut`]
2003 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
2004 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
2006 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
2007 * [Implement `Debug` for `std::vec::IntoIter`][35707]
2008 * [`CString`: avoid excessive growth just to 0-terminate][35871]
2009 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
2010 * [Use arc4rand on FreeBSD][35884]
2011 * [memrchr: Correct aligned offset computation][35969]
2012 * [Improve Demangling of Rust Symbols][36059]
2013 * [Use monotonic time in condition variables][35048]
2014 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
2015 * [Implement conversion traits for `char`][35755]
2016 * [Fix illegal instruction caused by overflow in channel cloning][36104]
2017 * [Zero first byte of CString on drop][36264]
2018 * [Inherit overflow checks for sum and product][36372]
2019 * [Add missing Eq implementations][36423]
2020 * [Implement `Debug` for `DirEntry`][36631]
2021 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
2023 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2024 * [Implement more traits for `std::io::ErrorKind`][35911]
2025 * [Optimize BinaryHeap bounds checking][36072]
2026 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
2027 `extend_with_element`][36355]
2028 * [Fix overflow checking in unsigned pow()][34942]
2033 * This release includes security fixes to both curl and OpenSSL.
2034 * [Fix transitive doctests when panic=abort][cargo/3021]
2035 * [Add --all-features flag to cargo][cargo/3038]
2036 * [Reject path-based dependencies in `cargo package`][cargo/3060]
2037 * [Don't parse the home directory more than once][cargo/3078]
2038 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
2039 * [Update OpenSSL to 1.0.2j][cargo/3121]
2040 * [Add license and license_file to cargo metadata output][cargo/3110]
2041 * [Make crates-io registry URL optional in config; ignore all changes to
2042 source.crates-io][cargo/3089]
2043 * [Don't download dependencies from other platforms][cargo/3123]
2044 * [Build transitive dev-dependencies when needed][cargo/3125]
2045 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
2046 * [Avoid updating registry when adding existing deps][cargo/3144]
2047 * [Warn about path overrides that won't work][cargo/3136]
2048 * [Use workspaces during `cargo install`][cargo/3146]
2049 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
2050 * [Add --message-format flag][cargo/3000]
2051 * [Pass target environment for rustdoc][cargo/3205]
2052 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
2053 * [Update curl and curl-sys][cargo/3241]
2054 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
2059 * [rustdoc: Add the `--sysroot` argument][36586]
2060 * [rustdoc: Fix a couple of issues with the search results][35655]
2061 * [rustdoc: remove the `!` from macro URLs and titles][35234]
2062 * [gdb: Fix pretty-printing special-cased Rust types][35585]
2063 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
2068 * [Remove unmaintained style guide][35124]
2069 * [Add s390x support][36369]
2070 * [Initial work at Haiku OS support][36727]
2071 * [Add mips-uclibc targets][35734]
2072 * [Crate-ify compiler-rt into compiler-builtins][35021]
2073 * [Add rustc version info (git hash + date) to dist tarball][36213]
2074 * Many documentation improvements
2079 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2080 * [Deny (by default) transmuting from fn item types to pointer-sized
2081 types][34923]. Continuing the long transition to zero-sized fn items,
2083 * [Fix `#[derive]` for empty tuple structs/variants][35728].
2085 * [Issue deprecation warnings for safe accesses to extern statics][36173]
2086 * [Fix lifetime rules for 'if' conditions][36029].
2087 * [Inherit overflow checks for sum and product][36372].
2088 * [Forbid user-defined macros named "macro_rules"][36730].
2090 [33922]: https://github.com/rust-lang/rust/pull/33922
2091 [34623]: https://github.com/rust-lang/rust/pull/34623
2092 [34923]: https://github.com/rust-lang/rust/pull/34923
2093 [34942]: https://github.com/rust-lang/rust/pull/34942
2094 [34982]: https://github.com/rust-lang/rust/pull/34982
2095 [35021]: https://github.com/rust-lang/rust/pull/35021
2096 [35048]: https://github.com/rust-lang/rust/pull/35048
2097 [35074]: https://github.com/rust-lang/rust/pull/35074
2098 [35124]: https://github.com/rust-lang/rust/pull/35124
2099 [35234]: https://github.com/rust-lang/rust/pull/35234
2100 [35238]: https://github.com/rust-lang/rust/pull/35238
2101 [35354]: https://github.com/rust-lang/rust/pull/35354
2102 [35559]: https://github.com/rust-lang/rust/pull/35559
2103 [35585]: https://github.com/rust-lang/rust/pull/35585
2104 [35627]: https://github.com/rust-lang/rust/pull/35627
2105 [35655]: https://github.com/rust-lang/rust/pull/35655
2106 [35702]: https://github.com/rust-lang/rust/pull/35702
2107 [35707]: https://github.com/rust-lang/rust/pull/35707
2108 [35728]: https://github.com/rust-lang/rust/pull/35728
2109 [35734]: https://github.com/rust-lang/rust/pull/35734
2110 [35755]: https://github.com/rust-lang/rust/pull/35755
2111 [35761]: https://github.com/rust-lang/rust/pull/35761
2112 [35764]: https://github.com/rust-lang/rust/pull/35764
2113 [35814]: https://github.com/rust-lang/rust/pull/35814
2114 [35854]: https://github.com/rust-lang/rust/pull/35854
2115 [35871]: https://github.com/rust-lang/rust/pull/35871
2116 [35884]: https://github.com/rust-lang/rust/pull/35884
2117 [35911]: https://github.com/rust-lang/rust/pull/35911
2118 [35969]: https://github.com/rust-lang/rust/pull/35969
2119 [35975]: https://github.com/rust-lang/rust/pull/35975
2120 [36004]: https://github.com/rust-lang/rust/pull/36004
2121 [36008]: https://github.com/rust-lang/rust/pull/36008
2122 [36014]: https://github.com/rust-lang/rust/pull/36014
2123 [36029]: https://github.com/rust-lang/rust/pull/36029
2124 [36059]: https://github.com/rust-lang/rust/pull/36059
2125 [36072]: https://github.com/rust-lang/rust/pull/36072
2126 [36101]: https://github.com/rust-lang/rust/pull/36101
2127 [36104]: https://github.com/rust-lang/rust/pull/36104
2128 [36171]: https://github.com/rust-lang/rust/pull/36171
2129 [36173]: https://github.com/rust-lang/rust/pull/36173
2130 [36178]: https://github.com/rust-lang/rust/pull/36178
2131 [36213]: https://github.com/rust-lang/rust/pull/36213
2132 [36214]: https://github.com/rust-lang/rust/pull/36214
2133 [36264]: https://github.com/rust-lang/rust/pull/36264
2134 [36266]: https://github.com/rust-lang/rust/pull/36266
2135 [36289]: https://github.com/rust-lang/rust/pull/36289
2136 [36338]: https://github.com/rust-lang/rust/pull/36338
2137 [36351]: https://github.com/rust-lang/rust/pull/36351
2138 [36355]: https://github.com/rust-lang/rust/pull/36355
2139 [36369]: https://github.com/rust-lang/rust/pull/36369
2140 [36372]: https://github.com/rust-lang/rust/pull/36372
2141 [36423]: https://github.com/rust-lang/rust/pull/36423
2142 [36482]: https://github.com/rust-lang/rust/pull/36482
2143 [36505]: https://github.com/rust-lang/rust/pull/36505
2144 [36524]: https://github.com/rust-lang/rust/pull/36524
2145 [36527]: https://github.com/rust-lang/rust/pull/36527
2146 [36551]: https://github.com/rust-lang/rust/pull/36551
2147 [36574]: https://github.com/rust-lang/rust/pull/36574
2148 [36586]: https://github.com/rust-lang/rust/pull/36586
2149 [36592]: https://github.com/rust-lang/rust/pull/36592
2150 [36631]: https://github.com/rust-lang/rust/pull/36631
2151 [36639]: https://github.com/rust-lang/rust/pull/36639
2152 [36721]: https://github.com/rust-lang/rust/pull/36721
2153 [36727]: https://github.com/rust-lang/rust/pull/36727
2154 [36730]: https://github.com/rust-lang/rust/pull/36730
2155 [36734]: https://github.com/rust-lang/rust/pull/36734
2156 [36754]: https://github.com/rust-lang/rust/pull/36754
2157 [36995]: https://github.com/rust-lang/rust/pull/36995
2158 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
2159 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
2160 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2161 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
2162 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
2163 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
2164 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
2165 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
2166 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
2167 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
2168 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
2169 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
2170 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
2171 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
2172 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
2173 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
2174 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
2175 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
2176 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
2177 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
2178 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
2179 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
2180 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
2181 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
2182 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
2183 [rustup]: https://www.rustup.rs
2184 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
2185 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
2186 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
2187 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
2188 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
2189 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
2190 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
2193 Version 1.12.1 (2016-10-20)
2194 ===========================
2199 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
2200 * [Confusion with double negation and booleans][36856]
2201 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
2202 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
2203 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
2204 * [Corrupted memory after updated to 1.12][36936]
2205 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
2206 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
2207 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
2209 [36381]: https://github.com/rust-lang/rust/issues/36381
2210 [36856]: https://github.com/rust-lang/rust/issues/36856
2211 [36875]: https://github.com/rust-lang/rust/issues/36875
2212 [36924]: https://github.com/rust-lang/rust/issues/36924
2213 [36926]: https://github.com/rust-lang/rust/issues/36926
2214 [36936]: https://github.com/rust-lang/rust/issues/36936
2215 [37026]: https://github.com/rust-lang/rust/issues/37026
2216 [37112]: https://github.com/rust-lang/rust/issues/37112
2217 [37153]: https://github.com/rust-lang/rust/issues/37153
2220 Version 1.12.0 (2016-09-29)
2221 ===========================
2226 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2227 This translation pass is far simpler than the previous AST->LLVM pass, and
2228 creates opportunities to perform new optimizations directly on the MIR. It
2229 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2230 * [`rustc` presents a new, more readable error format, along with
2231 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2232 Most common editors supporting Rust have been updated to work with it. It was
2233 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2238 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2239 This translation pass is far simpler than the previous AST->LLVM pass, and
2240 creates opportunities to perform new optimizations directly on the MIR. It
2241 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2242 * [Print the Rust target name, not the LLVM target name, with
2243 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
2244 * [The computation of `TypeId` is correct in some cases where it was previously
2245 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
2246 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
2247 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
2248 `--print relocation-models`, and `--print code-models` print the available
2249 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
2250 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
2251 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
2252 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
2253 These targets produce statically-linked binaries. There are no binary release
2259 * [`rustc` presents a new, more readable error format, along with
2260 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2261 Most common editors supporting Rust have been updated to work with it. It was
2262 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2263 * [In error descriptions, references are now described in plain English,
2264 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
2265 * [In error type descriptions, unknown numeric types are named `{integer}` or
2266 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
2267 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
2272 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
2273 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
2274 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
2275 useful](https://github.com/rust-lang/rust/pull/34908)
2276 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
2277 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
2278 * [Semicolons are properly required as statement delimiters inside
2279 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
2280 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2285 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
2286 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
2287 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
2288 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
2289 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
2290 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
2291 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
2292 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
2293 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
2294 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
2295 Both on Unix and Windows.
2296 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
2297 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
2298 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
2299 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
2300 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
2301 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
2302 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
2303 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
2308 * [The `format!` macro and friends now allow a single argument to be formatted
2309 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
2310 * [The lifetime bounds on `[T]::binary_search_by` and
2311 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
2312 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
2313 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
2314 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
2315 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
2316 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
2317 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
2318 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
2319 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
2320 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
2321 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
2322 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
2323 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
2324 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
2325 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
2326 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
2327 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
2328 * [`mpsc::sync_channel` `Receiver`s return any available message before
2329 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
2330 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
2331 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
2336 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
2337 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
2338 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
2339 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
2340 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
2341 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
2342 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
2343 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
2344 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
2345 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
2346 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
2347 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
2348 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
2349 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
2350 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
2351 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
2356 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
2357 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
2362 * [Test binaries now support a `--test-threads` argument to specify the number
2363 of threads used to run tests, and which acts the same as the
2364 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
2365 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
2366 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
2367 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2368 * [Rust releases now come with source packages that can be installed by rustup
2369 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
2370 The resulting source code can be used by tools and IDES, located in the
2371 sysroot under `lib/rustlib/src`.
2376 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
2377 * Many minor improvements to the documentation.
2378 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
2383 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
2384 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
2385 * [When formatting strings, if "precision" is specified, the "fill",
2386 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
2387 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
2390 Version 1.11.0 (2016-08-18)
2391 ===========================
2396 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2397 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
2398 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
2399 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
2400 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
2405 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
2406 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
2407 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
2408 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
2409 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
2410 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
2411 (in libcore - previously stabilized in libstd)
2412 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
2413 (in libcore - previously stabilized in libstd)
2414 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
2415 (in libcore - previously stabilized in libstd)
2416 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
2417 (in libcore - previously stabilized in libstd)
2418 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2419 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2420 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
2421 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
2426 * [The `thread_local!` macro supports multiple definitions in a single
2427 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
2428 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
2429 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
2430 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
2431 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
2432 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
2433 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
2434 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
2439 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
2440 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
2441 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
2442 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
2443 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
2444 and `-vv` prints warnings for all crates.
2445 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
2446 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
2447 This provides room for expansion by arbitrary tools.
2448 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
2449 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
2450 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
2451 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
2452 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
2453 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
2454 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
2459 * [Caching projections speeds up type check dramatically for some
2460 workloads](https://github.com/rust-lang/rust/pull/33816)
2461 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
2462 This hasher is faster, but is believed to provide sufficient
2463 protection from collision attacks.
2464 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
2469 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
2470 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
2471 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
2472 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
2473 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
2478 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
2479 * [When emitting debug info, rustc emits frame pointers for closures,
2480 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
2481 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2482 * Many more errors have been given error codes and extended
2484 * API documentation continues to be improved, with many new examples
2489 * [rustc no longer hangs when dependencies recursively re-export
2490 submodules](https://github.com/rust-lang/rust/pull/34542)
2491 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
2492 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
2493 rewritten](https://github.com/rust-lang/rust/pull/33895)
2494 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
2495 No targets use this yet, but it works toward AVR support.
2500 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
2501 * [The new follow-set rules that place restrictions on `macro_rules!`
2502 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
2503 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
2504 and has been a warning since 1.10.
2505 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
2506 This causes breakage in some corner cases.
2509 Version 1.10.0 (2016-07-07)
2510 ===========================
2515 * [Allow `concat_idents!` in type positions as well as in expression
2516 positions](https://github.com/rust-lang/rust/pull/33735).
2517 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
2518 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
2519 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
2520 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
2521 * [`panic!` can be converted to a runtime abort with the
2522 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
2523 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2524 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
2525 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
2526 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
2527 Note that Cargo does not yet directly support cdylibs.
2532 * `os::windows::fs::OpenOptionsExt::access_mode`
2533 * `os::windows::fs::OpenOptionsExt::share_mode`
2534 * `os::windows::fs::OpenOptionsExt::custom_flags`
2535 * `os::windows::fs::OpenOptionsExt::attributes`
2536 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
2537 * `os::unix::fs::OpenOptionsExt::custom_flags`
2538 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
2539 * `Default for sync::Weak`
2540 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
2541 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
2542 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
2543 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
2544 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
2545 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
2546 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
2547 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
2548 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
2549 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
2550 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
2551 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
2552 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
2553 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
2554 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
2555 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
2556 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
2557 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
2558 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
2559 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
2560 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
2561 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
2562 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
2563 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
2564 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
2565 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2566 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2567 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2568 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2569 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
2570 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
2571 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
2572 * Read/Write/RawFd impls for `UnixStream`
2573 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
2574 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
2575 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
2576 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
2577 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
2578 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
2579 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
2580 * RawFd impls for `UnixListener`
2581 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
2582 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
2583 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
2584 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
2585 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
2586 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
2587 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
2588 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
2589 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
2590 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
2591 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
2592 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
2593 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
2594 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
2595 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
2596 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
2597 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
2598 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
2599 * RawFd impls for `UnixDatagram`
2600 * `{BTree,Hash}Map::values_mut`
2601 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key)
2606 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
2607 The semantics of this minor method are subtle and probably not what
2609 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
2610 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
2611 will fall back to `/dev/urandom` temporarily to avoid blocking
2612 during early boot](https://github.com/rust-lang/rust/pull/33086).
2613 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
2614 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
2615 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
2616 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
2617 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
2618 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
2619 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
2623 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
2624 This controls the runtime behavior of the `panic!` macro
2625 and can be either "unwind" (the default), or "abort".
2626 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2627 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
2628 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
2629 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
2630 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
2631 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
2632 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
2633 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
2634 By default they are retried twice, which can be customized with the
2635 `net.retry` value in `.cargo/config`.
2636 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
2637 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
2638 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
2639 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
2640 Makes it possible to install multiple crates in parallel.
2641 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
2642 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
2643 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
2644 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
2645 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
2646 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
2651 * [rustc memory usage was reduced by refactoring the context used for
2652 type checking](https://github.com/rust-lang/rust/pull/33425).
2653 * [Speed up creation of `HashMap`s by caching the random keys used
2654 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
2655 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
2656 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
2657 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
2658 10x faster than the previous lookup tables.
2659 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
2664 * Many incremental improvements to documentation and rustdoc.
2665 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
2666 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
2667 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
2668 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
2669 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
2670 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
2671 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
2676 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
2677 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
2678 * [`std` no longer prints backtraces on platforms where the running
2679 module must be loaded with `env::current_exe`, which can't be relied
2680 on](https://github.com/rust-lang/rust/pull/33554).
2681 * This release includes std binaries for the i586-unknown-linux-gnu,
2682 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
2683 i586 target is for old x86 hardware without SSE2, and the armv7
2684 target is for Android running on modern ARM architectures.
2685 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
2686 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
2687 * [On Unix the runtime aborts by calling `libc::abort` instead of
2688 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
2689 * [Rust is now bootstrapped from the previous release of Rust,
2690 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
2695 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
2696 * [`target_env` for Linux ARM targets is just `gnu`, not
2697 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
2698 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
2699 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
2700 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
2701 Affects how macros are parsed.
2702 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
2703 * [Feature-gated attributes on macro-generated macro invocations are
2704 now rejected](https://github.com/rust-lang/rust/pull/32791).
2705 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
2706 This caused some minor changes to type inference.
2709 Version 1.9.0 (2016-05-26)
2710 ==========================
2715 * The `#[deprecated]` attribute when applied to an API will generate
2716 warnings when used. The warnings may be suppressed with
2717 `#[allow(deprecated)]`. [RFC 1270].
2718 * [`fn` item types are zero sized, and each `fn` names a unique
2719 type][1.9fn]. This will break code that transmutes `fn`s, so calling
2720 `transmute` on a `fn` type will generate a warning for a few cycles,
2721 then will be converted to an error.
2722 * [Field and method resolution understand visibility, so private
2723 fields and methods cannot prevent the proper use of public fields
2724 and methods][1.9fv].
2725 * [The parser considers unicode codepoints in the
2726 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
2732 * [`std::panic::catch_unwind`][] (renamed from `recover`)
2733 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
2734 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
2735 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
2736 * [`str::is_char_boundary`]
2737 * [`<*const T>::as_ref`]
2738 * [`<*mut T>::as_ref`]
2739 * [`<*mut T>::as_mut`]
2740 * [`AsciiExt::make_ascii_uppercase`]
2741 * [`AsciiExt::make_ascii_lowercase`]
2742 * [`char::decode_utf16`]
2743 * [`char::DecodeUtf16`]
2744 * [`char::DecodeUtf16Error`]
2745 * [`char::DecodeUtf16Error::unpaired_surrogate`]
2746 * [`BTreeSet::take`]
2747 * [`BTreeSet::replace`]
2750 * [`HashSet::replace`]
2752 * [`OsString::with_capacity`]
2753 * [`OsString::clear`]
2754 * [`OsString::capacity`]
2755 * [`OsString::reserve`]
2756 * [`OsString::reserve_exact`]
2757 * [`OsStr::is_empty`]
2759 * [`std::os::unix::thread`]
2762 * [`JoinHandleExt::as_pthread_t`]
2763 * [`JoinHandleExt::into_pthread_t`]
2764 * [`HashSet::hasher`]
2765 * [`HashMap::hasher`]
2766 * [`CommandExt::exec`]
2767 * [`File::try_clone`]
2768 * [`SocketAddr::set_ip`]
2769 * [`SocketAddr::set_port`]
2770 * [`SocketAddrV4::set_ip`]
2771 * [`SocketAddrV4::set_port`]
2772 * [`SocketAddrV6::set_ip`]
2773 * [`SocketAddrV6::set_port`]
2774 * [`SocketAddrV6::set_flowinfo`]
2775 * [`SocketAddrV6::set_scope_id`]
2776 * [`slice::copy_from_slice`]
2777 * [`ptr::read_volatile`]
2778 * [`ptr::write_volatile`]
2779 * [`OpenOptions::create_new`]
2780 * [`TcpStream::set_nodelay`]
2781 * [`TcpStream::nodelay`]
2782 * [`TcpStream::set_ttl`]
2783 * [`TcpStream::ttl`]
2784 * [`TcpStream::set_only_v6`]
2785 * [`TcpStream::only_v6`]
2786 * [`TcpStream::take_error`]
2787 * [`TcpStream::set_nonblocking`]
2788 * [`TcpListener::set_ttl`]
2789 * [`TcpListener::ttl`]
2790 * [`TcpListener::set_only_v6`]
2791 * [`TcpListener::only_v6`]
2792 * [`TcpListener::take_error`]
2793 * [`TcpListener::set_nonblocking`]
2794 * [`UdpSocket::set_broadcast`]
2795 * [`UdpSocket::broadcast`]
2796 * [`UdpSocket::set_multicast_loop_v4`]
2797 * [`UdpSocket::multicast_loop_v4`]
2798 * [`UdpSocket::set_multicast_ttl_v4`]
2799 * [`UdpSocket::multicast_ttl_v4`]
2800 * [`UdpSocket::set_multicast_loop_v6`]
2801 * [`UdpSocket::multicast_loop_v6`]
2802 * [`UdpSocket::set_multicast_ttl_v6`]
2803 * [`UdpSocket::multicast_ttl_v6`]
2804 * [`UdpSocket::set_ttl`]
2805 * [`UdpSocket::ttl`]
2806 * [`UdpSocket::set_only_v6`]
2807 * [`UdpSocket::only_v6`]
2808 * [`UdpSocket::join_multicast_v4`]
2809 * [`UdpSocket::join_multicast_v6`]
2810 * [`UdpSocket::leave_multicast_v4`]
2811 * [`UdpSocket::leave_multicast_v6`]
2812 * [`UdpSocket::take_error`]
2813 * [`UdpSocket::connect`]
2814 * [`UdpSocket::send`]
2815 * [`UdpSocket::recv`]
2816 * [`UdpSocket::set_nonblocking`]
2821 * [`std::sync::Once` is poisoned if its initialization function
2823 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
2824 * [Most types implement `fmt::Debug`][1.9db].
2825 * [The default buffer size used by `BufReader` and `BufWriter` was
2826 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
2827 used by other languages.
2828 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
2829 `Duration` additionally implements `*=` and `/=`][1.9ta].
2830 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
2831 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
2832 * [`Chain` implements `BufRead`][1.9ch].
2833 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
2838 * [Cargo can now run concurrently][1.9cc].
2839 * [Top-level overrides allow specific revisions of crates to be
2840 overridden through the entire crate graph][1.9ct]. This is intended
2841 to make upgrades easier for large projects, by allowing crates to be
2842 forked temporarily until they've been upgraded and republished.
2843 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
2844 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
2845 on the commandline][1.9cf]. `rustc` arguments can also be specified
2846 in the `build.rustflags` configuration key.
2851 * [The time complexity of comparing variables for equivalence during type
2852 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
2853 to major compilation time improvement in some scenarios.
2854 * [`ToString` is specialized for `str`, giving it the same performance
2855 as `to_owned`][1.9ts].
2856 * [Spawning processes with `Command::output` no longer creates extra
2858 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
2859 for C-like enums][1.9cl].
2864 * [Passing the `--quiet` flag to a test runner will produce
2865 much-abbreviated output][1.9q].
2866 * The Rust Project now publishes std binaries for the
2867 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
2868 `i586-pc-windows-msvc` targets.
2873 * [`std::sync::Once` is poisoned if its initialization function
2875 * [It is illegal to define methods with the same name in overlapping
2876 inherent `impl` blocks][1.9sn].
2877 * [`fn` item types are zero sized, and each `fn` names a unique
2878 type][1.9fn]. This will break code that transmutes `fn`s, so calling
2879 `transmute` on a `fn` type will generate a warning for a few cycles,
2880 then will be converted to an error.
2881 * [Improvements to const evaluation may trigger new errors when integer
2882 literals are out of range][1.9ce].
2885 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
2886 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
2887 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
2888 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
2889 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
2890 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
2891 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
2892 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
2893 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
2894 [1.9db]: https://github.com/rust-lang/rust/pull/32054
2895 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
2896 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
2897 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
2898 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
2899 [1.9o]: https://github.com/rust-lang/rust/pull/32325
2900 [1.9q]: https://github.com/rust-lang/rust/pull/31887
2901 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
2902 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
2903 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
2904 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
2905 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
2906 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
2907 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
2908 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
2909 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
2910 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
2911 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
2912 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
2913 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
2914 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
2915 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
2916 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
2917 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
2918 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
2919 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
2920 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
2921 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
2922 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
2923 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
2924 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
2925 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
2926 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
2927 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
2928 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
2929 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
2930 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
2931 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
2932 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
2933 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
2934 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
2935 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
2936 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
2937 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
2938 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
2939 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
2940 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
2941 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
2942 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
2943 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
2944 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
2945 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
2946 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
2947 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
2948 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
2949 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
2950 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
2951 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
2952 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
2953 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
2954 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
2955 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
2956 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
2957 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
2958 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
2959 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
2960 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
2961 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
2962 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
2963 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
2964 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
2965 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
2966 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
2967 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
2968 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
2969 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
2970 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
2971 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
2972 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
2973 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
2974 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
2975 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
2976 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
2977 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
2978 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
2979 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
2980 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
2981 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
2982 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
2983 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
2984 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
2985 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
2986 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
2987 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
2988 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
2989 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
2990 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
2991 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
2992 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
2993 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
2994 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
2997 Version 1.8.0 (2016-04-14)
2998 ==========================
3003 * Rust supports overloading of compound assignment statements like
3004 `+=` by implementing the [`AddAssign`], [`SubAssign`],
3005 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
3006 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
3008 * Empty structs can be defined with braces, as in `struct Foo { }`, in
3009 addition to the non-braced form, `struct Foo;`. [RFC 218].
3015 * [`str::encode_utf16`][] (renamed from `utf16_units`)
3016 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
3019 * [`ptr::drop_in_place`]
3021 * [`time::SystemTime`]
3023 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
3024 * [`Instant::elapsed`]
3025 * [`SystemTime::now`]
3026 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
3027 * [`SystemTime::elapsed`]
3028 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
3029 * [`SystemTimeError`]
3030 * [`SystemTimeError::duration`]
3031 * Various impls for `SystemTimeError`
3033 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
3034 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
3035 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
3036 * [The `write!` and `writeln!` macros correctly emit errors if any of
3037 their arguments can't be formatted][1.8w].
3038 * [Various I/O functions support large files on 32-bit Linux][1.8l].
3039 * [The Unix-specific `raw` modules, which contain a number of
3040 redefined C types are deprecated][1.8r], including `os::raw::unix`,
3041 `os::raw::macos`, and `os::raw::linux`. These modules defined types
3042 such as `ino_t` and `dev_t`. The inconsistency of these definitions
3043 across platforms was making it difficult to implement `std`
3044 correctly. Those that need these definitions should use the `libc`
3046 * The Unix-specific `MetadataExt` traits, including
3047 `os::unix::fs::MetadataExt`, which expose values such as inode
3048 numbers [no longer return platform-specific types][1.8r], but
3049 instead return widened integers. [RFC 1415].
3050 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
3051 * [Atomic loads and stores are not volatile][1.8a].
3052 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
3057 * [Inlining hash functions lead to a 3% compile-time improvement in
3058 some workloads][1.8h].
3059 * When using jemalloc, its symbols are [unprefixed so that it
3060 overrides the libc malloc implementation][1.8h]. This means that for
3061 rustc, LLVM is now using jemalloc, which results in a 6%
3062 compile-time improvement on a specific workload.
3063 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
3068 * [32-bit MSVC builds finally implement unwinding][1.8ms].
3069 i686-pc-windows-msvc is now considered a tier-1 platform.
3070 * [The `--print targets` flag prints a list of supported targets][1.8t].
3071 * [The `--print cfg` flag prints the `cfg`s defined for the current
3073 * [`rustc` can be built with an new Cargo-based build system, written
3074 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
3075 build system. To enable it configure with `configure --rustbuild`.
3076 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
3077 variants while also indicating the total number of missing variants
3078 if more than 3][1.8m].
3079 * [Executable stacks are disabled on Linux and BSD][1.8nx].
3080 * The Rust Project now publishes binary releases of the standard
3081 library for a number of tier-2 targets:
3082 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
3083 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
3084 `x86_64-rumprun-netbsd`. These can be installed with
3085 tools such as [multirust][1.8mr].
3090 * [`cargo init` creates a new Cargo project in the current
3091 directory][1.8ci]. It is otherwise like `cargo new`.
3092 * [Cargo has configuration keys for `-v` and
3093 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
3094 `[term]` section of `.cargo/config`.
3095 * [Configuration keys that evaluate to strings or integers can be set
3096 via environment variables][1.8ce]. For example the `build.jobs` key
3097 can be set via `CARGO_BUILD_JOBS`. Environment variables take
3098 precedence over config files.
3099 * [Target-specific dependencies support Rust `cfg` syntax for
3100 describing targets][1.8cfg] so that dependencies for multiple
3101 targets can be specified together. [RFC 1361].
3102 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
3103 `RUSTDOC` take precedence over the `build.target-dir`,
3104 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
3105 * [The child process tree is killed on Windows when Cargo is
3107 * [The `build.target` configuration value sets the target platform,
3108 like `--target`][1.8ct].
3113 * [Unstable compiler flags have been further restricted][1.8u]. Since
3114 1.0 `-Z` flags have been considered unstable, and other flags that
3115 were considered unstable additionally required passing `-Z
3116 unstable-options` to access. Unlike unstable language and library
3117 features though, these options have been accessible on the stable
3118 release channel. Going forward, *new unstable flags will not be
3119 available on the stable release channel*, and old unstable flags
3120 will warn about their usage. In the future, all unstable flags will
3121 be unavailable on the stable release channel.
3122 * [It is no longer possible to `match` on empty enum variants using
3123 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
3124 * The Unix-specific `MetadataExt` traits, including
3125 `os::unix::fs::MetadataExt`, which expose values such as inode
3126 numbers [no longer return platform-specific types][1.8r], but
3127 instead return widened integers. [RFC 1415].
3128 * [Modules sourced from the filesystem cannot appear within arbitrary
3129 blocks, but only within other modules][1.8mf].
3130 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
3131 * On Unix, [stack overflow triggers a runtime abort instead of a
3133 * [`Command::spawn` and its equivalents return an error if any of
3134 its command-line arguments contain interior `NUL`s][1.8n].
3135 * [Tuple and unit enum variants from other crates are in the type
3137 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
3138 type instead of `.a` files][1.8st]. Additionally, for the MSVC
3139 toolchain, `rustc` emits import libraries named `foo.dll.lib`
3140 instead of `foo.lib`.
3143 [1.8a]: https://github.com/rust-lang/rust/pull/30962
3144 [1.8b]: https://github.com/rust-lang/rust/pull/31123
3145 [1.8c]: https://github.com/rust-lang/rust/pull/31530
3146 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
3147 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
3148 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
3149 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
3150 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
3151 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
3152 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
3153 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
3154 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
3155 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
3156 [1.8h]: https://github.com/rust-lang/rust/pull/31460
3157 [1.8l]: https://github.com/rust-lang/rust/pull/31668
3158 [1.8m]: https://github.com/rust-lang/rust/pull/31020
3159 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
3160 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
3161 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
3162 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
3163 [1.8n]: https://github.com/rust-lang/rust/pull/31056
3164 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
3165 [1.8r]: https://github.com/rust-lang/rust/pull/31551
3166 [1.8so]: https://github.com/rust-lang/rust/pull/31333
3167 [1.8st]: https://github.com/rust-lang/rust/pull/29520
3168 [1.8t]: https://github.com/rust-lang/rust/pull/31358
3169 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
3170 [1.8u]: https://github.com/rust-lang/rust/pull/31793
3171 [1.8v]: https://github.com/rust-lang/rust/pull/31757
3172 [1.8w]: https://github.com/rust-lang/rust/pull/31904
3173 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
3174 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
3175 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
3176 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
3177 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
3178 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
3179 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
3180 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
3181 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
3182 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
3183 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
3184 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
3185 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
3186 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
3187 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
3188 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
3189 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
3190 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
3191 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
3192 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
3193 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
3194 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
3195 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
3196 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
3197 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
3198 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
3199 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
3200 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
3201 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
3202 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
3205 Version 1.7.0 (2016-03-03)
3206 ==========================
3213 * [`Path::strip_prefix`][] (renamed from relative_from)
3214 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
3216 * [`Ipv4Addr::is_loopback`]
3217 * [`Ipv4Addr::is_private`]
3218 * [`Ipv4Addr::is_link_local`]
3219 * [`Ipv4Addr::is_multicast`]
3220 * [`Ipv4Addr::is_broadcast`]
3221 * [`Ipv4Addr::is_documentation`]
3223 * [`Ipv6Addr::is_unspecified`]
3224 * [`Ipv6Addr::is_loopback`]
3225 * [`Ipv6Addr::is_multicast`]
3228 * [`Vec::as_mut_slice`]
3230 * [`String::as_str`]
3231 * [`String::as_mut_str`]
3233 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
3235 * `<[T]>::`[`sort_by_key`]
3236 * checked, saturated, and overflowing operations
3237 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
3238 * [`i32::saturating_mul`]
3239 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
3240 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
3241 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
3242 * [`u32::saturating_mul`]
3243 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
3244 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
3245 * and checked, saturated, and overflowing operations for other primitive types
3247 * [`ffi::IntoStringError`]
3248 * [`CString::into_string`]
3249 * [`CString::into_bytes`]
3250 * [`CString::into_bytes_with_nul`]
3251 * `From<CString> for Vec<u8>`
3253 * [`IntoStringError::into_cstring`]
3254 * [`IntoStringError::utf8_error`]
3255 * `Error for IntoStringError`
3257 * [`std::hash::BuildHasher`]
3258 * [`BuildHasher::Hasher`]
3259 * [`BuildHasher::build_hasher`]
3260 * [`std::hash::BuildHasherDefault`]
3261 * [`HashMap::with_hasher`]
3262 * [`HashMap::with_capacity_and_hasher`]
3263 * [`HashSet::with_hasher`]
3264 * [`HashSet::with_capacity_and_hasher`]
3265 * [`std::collections::hash_map::RandomState`]
3266 * [`RandomState::new`]
3267 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
3268 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
3269 from bytes is faster.
3270 * [The performance of `LineWriter` (and thus `io::stdout`) was
3271 improved by using `memchr` to search for newlines][1.7m].
3272 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
3273 `f64` variants were stabilized previously.
3274 * [`BTreeMap` was rewritten to use less memory and improve the performance
3275 of insertion and iteration, the latter by as much as 5x][1.7bm].
3276 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
3277 covariant over their contained type][1.7bt].
3278 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
3279 over their contained type][1.7ll].
3280 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
3282 * [`Any` is implemented for unsized types][1.7a].
3283 * [`Hash` is implemented for `Duration`][1.7h].
3288 * [When running tests with `--test`, rustdoc will pass `--cfg`
3289 arguments to the compiler][1.7dt].
3290 * [The compiler is built with RPATH information by default][1.7rpa].
3291 This means that it will be possible to run `rustc` when installed in
3292 unusual configurations without configuring the dynamic linker search
3294 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
3295 any RPATH entries (emitted with `-C rpath`) *not* take precedence
3296 over `LD_LIBRARY_PATH`.
3301 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
3302 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
3303 * [The `rerun-if-changed` build script directive no longer causes the
3304 build script to incorrectly run twice in certain scenarios][1.7rr].
3309 * Soundness fixes to the interactions between associated types and
3310 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
3311 code that violates the new rules. This is a significant change that
3312 is known to break existing code, so it has emitted warnings for the
3313 new error cases since 1.4 to give crate authors time to adapt. The
3314 details of what is changing are subtle; read the RFC for more.
3315 * [Several bugs in the compiler's visibility calculations were
3316 fixed][1.7v]. Since this was found to break significant amounts of
3317 code, the new errors will be emitted as warnings for several release
3318 cycles, under the `private_in_public` lint.
3319 * Defaulted type parameters were accidentally accepted in positions
3320 that were not intended. In this release, [defaulted type parameters
3321 appearing outside of type definitions will generate a
3322 warning][1.7d], which will become an error in future releases.
3323 * [Parsing "." as a float results in an error instead of 0][1.7p].
3324 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
3325 * [Borrows of closure parameters may not outlive the closure][1.7bc].
3327 [1.7a]: https://github.com/rust-lang/rust/pull/30928
3328 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
3329 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
3330 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
3331 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
3332 [1.7d]: https://github.com/rust-lang/rust/pull/30724
3333 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
3334 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
3335 [1.7f]: https://github.com/rust-lang/rust/pull/30672
3336 [1.7h]: https://github.com/rust-lang/rust/pull/30818
3337 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
3338 [1.7m]: https://github.com/rust-lang/rust/pull/30381
3339 [1.7p]: https://github.com/rust-lang/rust/pull/30681
3340 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
3341 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
3342 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
3343 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
3344 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
3345 [1.7v]: https://github.com/rust-lang/rust/pull/29973
3346 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3347 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
3348 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
3349 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
3350 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
3351 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
3352 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
3353 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
3354 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
3355 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
3356 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
3357 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
3358 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
3359 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
3360 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
3361 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
3362 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
3363 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
3364 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
3365 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
3366 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
3367 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
3368 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
3369 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
3370 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
3371 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
3372 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
3373 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
3374 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
3375 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
3376 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
3377 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
3378 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
3379 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
3380 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
3381 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
3382 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
3383 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
3384 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
3385 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
3386 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
3387 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
3388 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
3389 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
3390 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
3391 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
3392 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
3393 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3394 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
3395 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3396 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
3397 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
3398 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
3399 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
3400 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
3401 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
3402 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
3403 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
3404 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
3405 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
3408 Version 1.6.0 (2016-01-21)
3409 ==========================
3414 * The `#![no_std]` attribute causes a crate to not be linked to the
3415 standard library, but only the [core library][1.6co], as described
3416 in [RFC 1184]. The core library defines common types and traits but
3417 has no platform dependencies whatsoever, and is the basis for Rust
3418 software in environments that cannot support a full port of the
3419 standard library, such as operating systems. Most of the core
3420 library is now stable.
3426 [`Read::read_exact`],
3427 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
3428 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
3429 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
3430 [`os::unix::fs::DirBuilderExt`],
3431 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
3432 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
3433 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
3434 [`collections::hash_map::Drain`],
3435 [`collections::hash_map::HashMap::drain`],
3436 [`collections::hash_set::Drain`],
3437 [`collections::hash_set::HashSet::drain`],
3438 [`collections::binary_heap::Drain`],
3439 [`collections::binary_heap::BinaryHeap::drain`],
3440 [`Vec::extend_from_slice`][] (renamed from `push_all`),
3441 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
3442 [`RwLock::into_inner`],
3443 [`Iterator::min_by_key`][] (renamed from `min_by`),
3444 [`Iterator::max_by_key`][] (renamed from `max_by`).
3445 * The [core library][1.6co] is stable, as are most of its APIs.
3446 * [The `assert_eq!` macro supports arguments that don't implement
3447 `Sized`][1.6ae], such as arrays. In this way it behaves more like
3449 * Several timer functions that take duration in milliseconds [are
3450 deprecated in favor of those that take `Duration`][1.6ms]. These
3451 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
3452 `thread::park_timeout_ms`.
3453 * The algorithm by which `Vec` reserves additional elements was
3454 [tweaked to not allocate excessive space][1.6a] while still growing
3456 * `From` conversions are [implemented from integers to floats][1.6f]
3457 in cases where the conversion is lossless. Thus they are not
3458 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
3459 or `f64`. They are also not implemented for `isize` and `usize`
3460 because the implementations would be platform-specific. `From` is
3461 also implemented from `f32` to `f64`.
3462 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
3463 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
3464 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
3465 * [`BinaryHeap` was refactored][1.6bh] for modest performance
3467 * Sorting slices that are already sorted [is 50% faster in some
3473 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
3474 * Cargo build scripts can specify their dependencies by emitting the
3475 [`rerun-if-changed`][1.6rr] key.
3476 * crates.io will reject publication of crates with dependencies that
3477 have a wildcard version constraint. Crates with wildcard
3478 dependencies were seen to cause a variety of problems, as described
3479 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
3481 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
3482 release folder. A variety of artifacts that Cargo failed to clean
3483 are now correctly deleted.
3488 * The `unreachable_code` lint [warns when a function call's argument
3490 * The parser indicates [failures that may be caused by
3491 confusingly-similar Unicode characters][1.6uc]
3492 * Certain macro errors [are reported at definition time][1.6m], not
3498 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
3499 environment variable when locating crates. This was a pre-cargo
3500 feature for integrating with the package manager that was
3501 accidentally never removed.
3502 * [A number of bugs were fixed in the privacy checker][1.6p] that
3503 could cause previously-accepted code to break.
3504 * [Modules and unit/tuple structs may not share the same name][1.6ts].
3505 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
3506 struct pattern syntax (`Foo(..)`) can no longer be used to match
3507 unit structs. This is a warning now, but will become an error in
3508 future releases. Patterns that share the same name as a const are
3510 * A bug was fixed that causes [rustc not to apply default type
3511 parameters][1.6xc] when resolving certain method implementations of
3512 traits defined in other crates.
3514 [1.6a]: https://github.com/rust-lang/rust/pull/29454
3515 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
3516 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
3517 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
3518 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
3519 [1.6co]: http://doc.rust-lang.org/beta/core/index.html
3520 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
3521 [1.6f]: https://github.com/rust-lang/rust/pull/29129
3522 [1.6m]: https://github.com/rust-lang/rust/pull/29828
3523 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
3524 [1.6p]: https://github.com/rust-lang/rust/pull/29726
3525 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
3526 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
3527 [1.6s]: https://github.com/rust-lang/rust/pull/29675
3528 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
3529 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
3530 [1.6us]: https://github.com/rust-lang/rust/pull/29383
3531 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
3532 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
3533 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3534 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
3535 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
3536 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
3537 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
3538 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
3539 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
3540 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
3541 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
3542 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
3543 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
3544 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
3545 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
3546 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
3547 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
3548 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
3549 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
3550 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
3551 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
3552 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
3553 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
3554 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
3555 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
3556 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
3557 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
3558 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
3559 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
3560 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
3563 Version 1.5.0 (2015-12-10)
3564 ==========================
3566 * ~700 changes, numerous bugfixes
3572 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
3573 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
3574 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
3575 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
3576 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
3577 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
3578 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
3579 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
3580 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
3581 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
3582 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
3583 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
3584 [`Path::read_link`], [`Path::symlink_metadata`],
3585 [`Utf8Error::valid_up_to`], [`Vec::resize`],
3586 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
3587 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
3588 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
3589 [`slice::split_first_mut`], [`slice::split_first`],
3590 [`slice::split_last_mut`], [`slice::split_last`],
3591 [`char::from_u32_unchecked`], [`fs::canonicalize`],
3592 [`str::MatchIndices`], [`str::RMatchIndices`],
3593 [`str::match_indices`], [`str::rmatch_indices`],
3594 [`str::slice_mut_unchecked`], [`string::ParseError`].
3595 * Rust applications hosted on crates.io can be installed locally to
3596 `~/.cargo/bin` with the [`cargo install`] command. Among other
3597 things this makes it easier to augment Cargo with new subcommands:
3598 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
3599 invoked as `cargo foo`.
3600 * Crates with wildcard (`*`) dependencies will [emit warnings when
3601 published][1.5w]. In 1.6 it will no longer be possible to publish
3602 crates with wildcard dependencies.
3607 * The rules determining when a particular lifetime must outlive
3608 a particular value (known as '[dropck]') have been [modified
3609 to not rely on parametricity][1.5p].
3610 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
3611 and `Arc`][1.5a]. Because these smart pointer types implement
3612 `Deref`, this causes breakage in cases where the interior type
3613 contains methods of the same name.
3614 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
3615 that they could drop their content. Soundness fix.
3616 * All method invocations are [properly checked][1.5wf1] for
3617 [well-formedness][1.5wf2]. Soundness fix.
3618 * Traits whose supertraits contain `Self` are [not object
3619 safe][1.5o]. Soundness fix.
3620 * Target specifications support a [`no_default_libraries`][1.5nd]
3621 setting that controls whether `-nodefaultlibs` is passed to the
3622 linker, and in turn the `is_like_windows` setting no longer affects
3623 the `-nodefaultlibs` flag.
3624 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
3625 * The `#[inline]` and `#[repr]` attributes [can only appear
3626 in valid locations][1.5at].
3627 * Native libraries linked from the local crate are [passed to
3628 the linker before native libraries from upstream crates][1.5nl].
3629 * Two rarely-used attributes, `#[no_debug]` and
3630 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
3631 * Negation of unsigned integers, which has been a warning for
3632 several releases, [is now behind a feature gate and will
3633 generate errors][1.5nu].
3634 * The parser accidentally accepted visibility modifiers on
3635 enum variants, a bug [which has been fixed][1.5ev].
3636 * [A bug was fixed that allowed `use` statements to import unstable
3642 * When evaluating expressions at compile-time that are not
3643 compile-time constants (const-evaluating expressions in non-const
3644 contexts), incorrect code such as overlong bitshifts and arithmetic
3645 overflow will [generate a warning instead of an error][1.5ce],
3646 delaying the error until runtime. This will allow the
3647 const-evaluator to be expanded in the future backwards-compatibly.
3648 * The `improper_ctypes` lint [no longer warns about using `isize` and
3649 `usize` in FFI][1.5ict].
3654 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
3656 * `Default` is [implemented for mutable slices][1.5d].
3657 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
3658 * There are now `From` conversions [between floating point
3659 types][1.5f] where the conversions are lossless.
3660 * There are now `From` conversions [between integer types][1.5i] where
3661 the conversions are lossless.
3662 * [`fs::Metadata` implements `Clone`][1.5fs].
3663 * The `parse` method [accepts a leading "+" when parsing
3665 * [`AsMut` is implemented for `Vec`][1.5am].
3666 * The `clone_from` implementations for `String` and `BinaryHeap` [have
3667 been optimized][1.5cf] and no longer rely on the default impl.
3668 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
3669 `unsafe extern "C"` function types now [implement `Clone`,
3670 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
3671 `fmt::Debug` for up to 12 arguments][1.5fp].
3672 * [Dropping `Vec`s is much faster in unoptimized builds when the
3673 element types don't implement `Drop`][1.5dv].
3674 * A bug that caused in incorrect behavior when [combining `VecDeque`
3675 with zero-sized types][1.5vdz] was resolved.
3676 * [`PartialOrd` for slices is faster][1.5po].
3681 * [Crate metadata size was reduced by 20%][1.5md].
3682 * [Improvements to code generation reduced the size of libcore by 3.3
3683 MB and rustc's memory usage by 18MB][1.5m].
3684 * [Improvements to deref translation increased performance in
3685 unoptimized builds][1.5dr].
3686 * Various errors in trait resolution [are deduplicated to only be
3687 reported once][1.5te].
3688 * Rust has preliminary [support for rumprun kernels][1.5rr].
3689 * Rust has preliminary [support for NetBSD on amd64][1.5na].
3691 [1.5use]: https://github.com/rust-lang/rust/pull/28364
3692 [1.5po]: https://github.com/rust-lang/rust/pull/28436
3693 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
3694 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
3695 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
3696 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
3697 [1.5md]: https://github.com/rust-lang/rust/pull/28521
3698 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
3699 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
3700 [1.5na]: https://github.com/rust-lang/rust/pull/28543
3701 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
3702 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
3703 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
3704 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
3705 [1.5te]: https://github.com/rust-lang/rust/pull/28645
3706 [1.5at]: https://github.com/rust-lang/rust/pull/28650
3707 [1.5am]: https://github.com/rust-lang/rust/pull/28663
3708 [1.5m]: https://github.com/rust-lang/rust/pull/28778
3709 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
3710 [1.5a]: https://github.com/rust-lang/rust/pull/28811
3711 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
3712 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
3713 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
3714 [1.5i]: https://github.com/rust-lang/rust/pull/28921
3715 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
3716 [1.5f]: https://github.com/rust-lang/rust/pull/29129
3717 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
3718 [1.5s]: https://github.com/rust-lang/rust/pull/29190
3719 [1.5d]: https://github.com/rust-lang/rust/pull/29245
3720 [1.5o]: https://github.com/rust-lang/rust/pull/29259
3721 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
3722 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3723 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
3724 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
3725 [1.5c]: https://github.com/rust-lang/rust/pull/29110
3726 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3727 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
3728 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
3729 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
3730 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
3731 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
3732 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
3733 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
3734 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
3735 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
3736 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
3737 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
3738 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
3739 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
3740 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
3741 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
3742 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
3743 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
3744 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
3745 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
3746 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
3747 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
3748 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
3749 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
3750 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
3751 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
3752 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
3753 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
3754 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
3755 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
3756 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
3757 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
3758 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
3759 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
3760 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
3761 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
3762 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
3763 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
3764 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
3765 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
3766 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
3767 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
3768 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
3769 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
3770 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
3771 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
3772 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
3773 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
3774 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
3775 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
3776 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
3777 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
3778 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
3779 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
3781 Version 1.4.0 (2015-10-29)
3782 ==========================
3784 * ~1200 changes, numerous bugfixes
3789 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
3790 GNU) are now supported and recommended for use.
3795 * [Several changes have been made to fix type soundness and improve
3796 the behavior of associated types][sound]. See [RFC 1214]. Although
3797 we have mostly introduced these changes as warnings this release, to
3798 become errors next release, there are still some scenarios that will
3799 see immediate breakage.
3800 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
3801 line breaks in addition to `\n`][crlf].
3802 * [Loans of `'static` lifetime extend to the end of a function][stat].
3803 * [`str::parse` no longer introduces avoidable rounding error when
3804 parsing floating point numbers. Together with earlier changes to
3805 float formatting/output, "round trips" like f.to_string().parse()
3806 now preserve the value of f exactly. Additionally, leading plus
3807 signs are now accepted][fp3].
3813 * `use` statements that import multiple items [can now rename
3814 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
3815 * [Binops work correctly on fat pointers][binfat].
3816 * `pub extern crate`, which does not behave as expected, [issues a
3817 warning][pec] until a better solution is found.
3822 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
3823 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
3824 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
3825 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
3826 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
3827 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
3828 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
3829 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
3830 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
3831 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
3832 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
3833 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
3834 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
3835 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
3836 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
3837 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
3838 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
3839 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
3841 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
3842 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
3843 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
3844 `f64::from_str_radix`.
3845 * [Reverse-searching strings is faster with the 'two-way'
3847 * [`std::io::copy` allows `?Sized` arguments][cc].
3848 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
3849 [override `count`, `nth` and `last` with an O(1)
3850 implementation][it].
3851 * [`Default` is implemented for arrays up to `[T; 32]`][d].
3852 * [`IntoRawFd` has been added to the Unix-specific prelude,
3853 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
3855 * [`Extend<String>` and `FromIterator<String` are both implemented for
3857 * [`IntoIterator` is implemented for references to `Option` and
3859 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
3860 Copy`][ext] as part of [RFC 839]. This will cause type inference
3861 breakage in rare situations.
3862 * [`BinaryHeap` implements `Debug`][bh2].
3863 * [`Borrow` and `BorrowMut` are implemented for fixed-size
3865 * [`extern fn`s with the "Rust" and "C" ABIs implement common
3866 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
3867 * [String comparison is faster][faststr].
3868 * `&mut T` where `T: std::fmt::Write` [also implements
3869 `std::fmt::Write`][mutw].
3870 * [A stable regression in `VecDeque::push_back` and other
3871 capacity-altering methods that caused panics for zero-sized types
3873 * [Function pointers implement traits for up to 12 parameters][fp2].
3878 * The compiler [no longer uses the 'morestack' feature to prevent
3879 stack overflow][mm]. Instead it uses guard pages and stack
3880 probes (though stack probes are not yet implemented on any platform
3882 * [The compiler matches traits faster when projections are involved][p].
3883 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
3885 * [Cargo now displays useful information about what its doing during
3886 `cargo update`][cu].
3888 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
3889 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
3890 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
3891 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
3892 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
3893 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
3894 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
3895 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
3896 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
3897 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
3898 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
3899 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
3900 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
3901 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
3902 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
3903 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
3904 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
3905 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
3906 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
3907 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
3908 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
3909 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
3910 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
3911 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
3912 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
3913 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
3914 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
3915 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
3916 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
3917 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
3918 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
3919 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
3920 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
3921 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
3922 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
3923 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
3924 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
3925 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
3926 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
3927 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
3928 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
3929 [bh2]: https://github.com/rust-lang/rust/pull/28156
3930 [binfat]: https://github.com/rust-lang/rust/pull/28270
3931 [bm]: https://github.com/rust-lang/rust/pull/28197
3932 [cc]: https://github.com/rust-lang/rust/pull/27531
3933 [crlf]: https://github.com/rust-lang/rust/pull/28034
3934 [cu]: https://github.com/rust-lang/cargo/pull/1931
3935 [d]: https://github.com/rust-lang/rust/pull/27825
3936 [dep]: https://github.com/rust-lang/rust/pull/28339
3937 [es]: https://github.com/rust-lang/rust/pull/27956
3938 [ext]: https://github.com/rust-lang/rust/pull/28094
3939 [faststr]: https://github.com/rust-lang/rust/pull/28338
3940 [ffi]: https://github.com/rust-lang/rust/pull/28779
3941 [fp]: https://github.com/rust-lang/rust/pull/28268
3942 [fp2]: https://github.com/rust-lang/rust/pull/28560
3943 [fp3]: https://github.com/rust-lang/rust/pull/27307
3944 [i]: https://github.com/rust-lang/rust/pull/27451
3945 [into2]: https://github.com/rust-lang/rust/pull/28039
3946 [it]: https://github.com/rust-lang/rust/pull/27652
3947 [mm]: https://github.com/rust-lang/rust/pull/27338
3948 [mutw]: https://github.com/rust-lang/rust/pull/28368
3949 [sound]: https://github.com/rust-lang/rust/pull/27641
3950 [p]: https://github.com/rust-lang/rust/pull/27866
3951 [pec]: https://github.com/rust-lang/rust/pull/28486
3952 [pr]: https://github.com/rust-lang/rust/pull/27896
3953 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
3954 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3955 [s]: https://github.com/rust-lang/rust/pull/27474
3956 [stab]: https://github.com/rust-lang/rust/pull/28339
3957 [stat]: https://github.com/rust-lang/rust/pull/28321
3958 [vd]: https://github.com/rust-lang/rust/pull/28494
3960 Version 1.3.0 (2015-09-17)
3961 ==============================
3963 * ~900 changes, numerous bugfixes
3968 * The [new object lifetime defaults][nold] have been [turned
3969 on][nold2] after a cycle of warnings about the change. Now types
3970 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
3971 being interpreted as `&'a Box<Trait+'a>` to `&'a
3972 Box<Trait+'static>`.
3973 * [The Rustonomicon][nom] is a new book in the official documentation
3974 that dives into writing unsafe Rust.
3975 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
3976 timekeeping is employed by other std APIs, as well as out-of-tree
3982 * The [new object lifetime defaults][nold] have been [turned
3983 on][nold2] after a cycle of warnings about the change.
3984 * There is a known [regression][lr] in how object lifetime elision is
3985 interpreted, the proper solution for which is undetermined.
3986 * The `#[prelude_import]` attribute, an internal implementation
3987 detail, was accidentally stabilized previously. [It has been put
3988 behind the `prelude_import` feature gate][pi]. This change is
3989 believed to break no existing code.
3990 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
3991 [more sane for dynamically sized types][dst3]. Code that relied on
3992 the previous behavior is thought to be broken.
3993 * The `dropck` rules, which checks that destructors can't access
3994 destroyed values, [have been updated][dropck] to match the
3995 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
3996 cause some previously-compiling code to no longer build.
4001 * The [new object lifetime defaults][nold] have been [turned
4002 on][nold2] after a cycle of warnings about the change.
4003 * Semicolons may [now follow types and paths in
4004 macros](https://github.com/rust-lang/rust/pull/27000).
4005 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4006 [more sane for dynamically sized types][dst3]. Code that relied on
4007 the previous behavior is not known to exist, and suspected to be
4009 * `'static` variables [may now be recursive][st].
4010 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
4011 implementations correctly.
4012 * The `dropck` rules, which checks that destructors can't access
4013 destroyed values, [have been updated][dropck] to match the
4019 * The [`Duration`] API, [has been stabilized][ds], as well as the
4020 `std::time` module, which presently contains only `Duration`.
4021 * `Box<str>` and `Box<[T]>` both implement `Clone`.
4022 * The owned C string, [`CString`], implements [`Borrow`] and the
4023 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
4024 these allow C strings to be borrowed and cloned in generic code.
4025 * [`CStr`] implements [`Debug`].
4026 * [`AtomicPtr`] implements [`Debug`].
4027 * [`Error`] trait objects [can be downcast to their concrete types][e]
4028 in many common configurations, using the [`is`], [`downcast`],
4029 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
4031 * Searching for substrings now [employs the two-way algorithm][search]
4032 instead of doing a naive search. This gives major speedups to a
4033 number of methods, including [`contains`][sc], [`find`][sf],
4034 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
4035 [`ends_with`][sew] are also faster.
4036 * The performance of `PartialEq` for slices is [much faster][ps].
4037 * The [`Hash`] trait offers the default method, [`hash_slice`], which
4038 is overridden and optimized by the implementations for scalars.
4039 * The [`Hasher`] trait now has a number of specialized `write_*`
4040 methods for primitive types, for efficiency.
4041 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
4042 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
4043 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
4044 of [`std::error::Error::cause`][iec] also delegates to the inner
4046 * [`process::Child`][pc] gained the [`id`] method, which returns a
4047 `u32` representing the platform-specific process identifier.
4048 * The [`connect`] method on slices is deprecated, replaced by the new
4049 [`join`] method (note that both of these are on the *unstable*
4050 [`SliceConcatExt`] trait, but through the magic of the prelude are
4051 available to stable code anyway).
4052 * The [`Div`] operator is implemented for [`Wrapping`] types.
4053 * [`DerefMut` is implemented for `String`][dms].
4054 * Performance of SipHash (the default hasher for `HashMap`) is
4055 [better for long data][sh].
4056 * [`AtomicPtr`] implements [`Send`].
4057 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
4058 are now [specialized to use uninitialized buffers for increased
4060 * Lifetime parameters of foreign functions [are now resolved
4066 * Rust can now, with some coercion, [produce programs that run on
4067 Windows XP][xp], though XP is not considered a supported platform.
4068 * Porting Rust on Windows from the GNU toolchain to MSVC continues
4069 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
4070 recommended for use in 1.3, though should be fully-functional
4071 in the [64-bit 1.4 beta][b14].
4072 * On Fedora-based systems installation will [properly configure the
4073 dynamic linker][fl].
4074 * The compiler gained many new extended error descriptions, which can
4075 be accessed with the `--explain` flag.
4076 * The `dropck` pass, which checks that destructors can't access
4077 destroyed values, [has been rewritten][dropck]. This fixes some
4078 soundness holes, and as such will cause some previously-compiling
4079 code to no longer build.
4080 * `rustc` now uses [LLVM to write archive files where possible][ar].
4081 Eventually this will eliminate the compiler's dependency on the ar
4083 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
4084 supported FreeBSD on x86_64).
4085 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
4086 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
4088 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
4089 will kill the process instead of leaking][nlp].
4091 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
4092 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
4093 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
4094 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
4095 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
4096 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4097 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4098 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
4099 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
4100 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
4101 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
4102 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
4103 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
4104 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4105 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
4106 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
4107 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
4108 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
4109 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4110 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
4111 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
4112 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
4113 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
4114 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4115 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
4116 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
4117 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
4118 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
4119 [ar]: https://github.com/rust-lang/rust/pull/26926
4120 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
4121 [dms]: https://github.com/rust-lang/rust/pull/26241
4122 [dropck]: https://github.com/rust-lang/rust/pull/27261
4123 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4124 [ds]: https://github.com/rust-lang/rust/pull/26818
4125 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
4126 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
4127 [dst3]: https://github.com/rust-lang/rust/pull/27351
4128 [e]: https://github.com/rust-lang/rust/pull/24793
4129 [f]: https://github.com/rust-lang/rust/pull/26588
4130 [fb]: https://github.com/rust-lang/rust/pull/26959
4131 [fl]: https://github.com/rust-lang/rust-installer/pull/41
4132 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4133 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
4134 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
4135 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
4136 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
4137 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
4138 [lic]: https://github.com/rust-lang/rust/pull/26583
4139 [lnu]: https://github.com/rust-lang/rust/pull/27026
4140 [lr]: https://github.com/rust-lang/rust/issues/27248
4141 [lum]: https://github.com/rust-lang/rust/pull/26378
4142 [lur]: https://github.com/rust-lang/rust/pull/26783
4143 [nlp]: https://github.com/rust-lang/rust/pull/27176
4144 [nold2]: https://github.com/rust-lang/rust/pull/27045
4145 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
4146 [nom]: http://doc.rust-lang.org/nightly/nomicon/
4147 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
4148 [pi]: https://github.com/rust-lang/rust/pull/26699
4149 [ps]: https://github.com/rust-lang/rust/pull/26884
4150 [rte]: https://github.com/rust-lang/rust/pull/26950
4151 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
4152 [search]: https://github.com/rust-lang/rust/pull/26327
4153 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
4154 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
4155 [sh]: https://github.com/rust-lang/rust/pull/27280
4156 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
4157 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
4158 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
4159 [st]: https://github.com/rust-lang/rust/pull/26630
4160 [win1]: https://github.com/rust-lang/rust/pull/26569
4161 [win2]: https://github.com/rust-lang/rust/pull/26741
4162 [win3]: https://github.com/rust-lang/rust/pull/26741
4163 [win4]: https://github.com/rust-lang/rust/pull/27210
4164 [xp]: https://github.com/rust-lang/rust/pull/26569
4166 Version 1.2.0 (2015-08-07)
4167 ==========================
4169 * ~1200 changes, numerous bugfixes
4174 * [Dynamically-sized-type coercions][dst] allow smart pointer types
4175 like `Rc` to contain types without a fixed size, arrays and trait
4176 objects, finally enabling use of `Rc<[T]>` and completing the
4177 implementation of DST.
4178 * [Parallel codegen][parcodegen] is now working again, which can
4179 substantially speed up large builds in debug mode; It also gets
4180 another ~33% speedup when bootstrapping on a 4 core machine (using 8
4181 jobs). It's not enabled by default, but will be "in the near
4182 future". It can be activated with the `-C codegen-units=N` flag to
4184 * This is the first release with [experimental support for linking
4185 with the MSVC linker and lib C on Windows (instead of using the GNU
4186 variants via MinGW)][win]. It is yet recommended only for the most
4187 intrepid Rustaceans.
4188 * Benchmark compilations are showing a 30% improvement in
4189 bootstrapping over 1.1.
4194 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
4195 unicode case mapping, which is a previously-planned change in
4196 behavior and considered a bugfix.
4197 * [`mem::align_of`] now specifies [the *minimum alignment* for
4198 T][align], which is usually the alignment programs are interested
4199 in, and the same value reported by clang's
4200 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
4202 * [The `#[packed]` attribute is no longer silently accepted by the
4203 compiler][packed]. This attribute did nothing and code that
4204 mentioned it likely did not work as intended.
4205 * Associated type defaults are [now behind the
4206 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
4207 defaults *did not work*, but could be mentioned syntactically. As
4208 such this breakage has minimal impact.
4213 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
4214 matching against dereferencable values.
4219 * The [`Extend`] trait, which grows a collection from an iterator, is
4220 implemented over iterators of references, for `String`, `Vec`,
4221 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
4222 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
4223 * The [`iter::once`] function returns an iterator that yields a single
4224 element, and [`iter::empty`] returns an iterator that yields no
4226 * The [`matches`] and [`rmatches`] methods on `str` return iterators
4227 over substring matches.
4228 * [`Cell`] and [`RefCell`] both implement `Eq`.
4229 * A number of methods for wrapping arithmetic are added to the
4230 integral types, [`wrapping_div`], [`wrapping_rem`],
4231 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
4232 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
4233 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
4234 type.. It is illegal for the default arithmetic operations in Rust
4235 to overflow; the desire to wrap must be explicit.
4236 * The `{:#?}` formatting specifier [displays the alternate,
4237 pretty-printed][debugfmt] form of the `Debug` formatter. This
4238 feature was actually introduced prior to 1.0 with little
4240 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
4241 for writing data to formatted strings, similar to [`io::Write`].
4242 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
4243 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
4244 are used by code generators to emit implementations of [`Debug`].
4245 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
4246 methods that convert case, following Unicode case mapping.
4247 * It is now easier to handle poisoned locks. The [`PoisonError`]
4248 type, returned by failing lock operations, exposes `into_inner`,
4249 `get_ref`, and `get_mut`, which all give access to the inner lock
4250 guard, and allow the poisoned lock to continue to operate. The
4251 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
4252 poisoned lock without attempting to take the lock.
4253 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
4254 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
4255 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
4256 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
4258 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
4264 * `rustc` employs smarter heuristics for guessing at [typos].
4265 * `rustc` emits more efficient code for [no-op conversions between
4266 unsafe pointers][nop].
4267 * Fat pointers are now [passed in pairs of immediate arguments][fat],
4268 resulting in faster compile times and smaller code.
4270 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
4271 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4272 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
4273 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
4274 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
4275 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
4276 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
4277 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
4278 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
4279 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
4280 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
4281 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
4282 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
4283 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
4284 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
4285 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
4286 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4287 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
4288 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
4289 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
4290 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
4291 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
4292 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
4293 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
4294 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
4295 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4296 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
4297 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
4298 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
4299 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
4300 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
4301 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
4302 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
4303 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4304 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4305 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
4306 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
4307 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
4308 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
4309 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
4310 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
4311 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4312 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
4313 [align]: https://github.com/rust-lang/rust/pull/25646
4314 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
4315 [typos]: https://github.com/rust-lang/rust/pull/26087
4316 [nop]: https://github.com/rust-lang/rust/pull/26336
4317 [fat]: https://github.com/rust-lang/rust/pull/26411
4318 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
4319 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
4320 [packed]: https://github.com/rust-lang/rust/pull/25541
4321 [ad]: https://github.com/rust-lang/rust/pull/27382
4322 [win]: https://github.com/rust-lang/rust/pull/25350
4324 Version 1.1.0 (2015-06-25)
4325 =========================
4327 * ~850 changes, numerous bugfixes
4332 * The [`std::fs` module has been expanded][fs] to expand the set of
4333 functionality exposed:
4334 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
4335 don't incur a syscall on some platforms.
4336 * A `symlink_metadata` function has been added.
4337 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
4338 access to all underlying information.
4339 * The compiler now contains extended explanations of many errors. When an error
4340 with an explanation occurs the compiler suggests using the `--explain` flag
4341 to read the explanation. Error explanations are also [available online][err-index].
4342 * Thanks to multiple [improvements][sk] to [type checking][pre], as
4343 well as other work, the time to bootstrap the compiler decreased by
4349 * The [`str::split_whitespace`] method splits a string on unicode
4350 whitespace boundaries.
4351 * On both Windows and Unix, new extension traits provide conversion of
4352 I/O types to and from the underlying system handles. On Unix, these
4353 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
4354 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
4355 `TcpListener`, and `UpdSocket`. Further implementations for
4356 `std::process` will be stabilized later.
4357 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
4358 Windows, symlinks can be created with
4359 `std::os::windows::symlink_dir` and
4360 `std::os::windows::symlink_file`.
4361 * The `mpsc::Receiver` type can now be converted into an iterator with
4362 `into_iter` on the [`IntoIterator`] trait.
4363 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
4364 implementation of the [`From`] trait.
4365 * The `Debug` implementation for `RangeFull` [creates output that is
4366 more consistent with other implementations][rf].
4367 * [`Debug` is implemented for `File`][file].
4368 * The `Default` implementation for `Arc` [no longer requires `Sync +
4370 * [The `Iterator` methods `count`, `nth`, and `last` have been
4371 overridden for slices to have O(1) performance instead of O(n)][si].
4372 * Incorrect handling of paths on Windows has been improved in both the
4373 compiler and the standard library.
4374 * [`AtomicPtr` gained a `Default` implementation][ap].
4375 * In accordance with Rust's policy on arithmetic overflow `abs` now
4376 [panics on overflow when debug assertions are enabled][abs].
4377 * The [`Cloned`] iterator, which was accidentally left unstable for
4378 1.0 [has been stabilized][c].
4379 * The [`Incoming`] iterator, which iterates over incoming TCP
4380 connections, and which was accidentally unnamable in 1.0, [is now
4381 properly exported][inc].
4382 * [`BinaryHeap`] no longer corrupts itself [when functions called by
4383 `sift_up` or `sift_down` panic][bh].
4384 * The [`split_off`] method of `LinkedList` [no longer corrupts
4385 the list in certain scenarios][ll].
4390 * Type checking performance [has improved notably][sk] with
4391 [multiple improvements][pre].
4392 * The compiler [suggests code changes][ch] for more errors.
4393 * rustc and it's build system have experimental support for [building
4394 toolchains against MUSL][m] instead of glibc on Linux.
4395 * The compiler defines the `target_env` cfg value, which is used for
4396 distinguishing toolchains that are otherwise for the same
4397 platform. Presently this is set to `gnu` for common GNU Linux
4398 targets and for MinGW targets, and `musl` for MUSL Linux targets.
4399 * The [`cargo rustc`][crc] command invokes a build with custom flags
4401 * [Android executables are always position independent][pie].
4402 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
4405 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
4406 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4407 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4408 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
4409 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
4410 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
4411 [rf]: https://github.com/rust-lang/rust/pull/24491
4412 [err-index]: https://doc.rust-lang.org/error-index.html
4413 [sk]: https://github.com/rust-lang/rust/pull/24615
4414 [pre]: https://github.com/rust-lang/rust/pull/25323
4415 [file]: https://github.com/rust-lang/rust/pull/24598
4416 [ch]: https://github.com/rust-lang/rust/pull/24683
4417 [arc]: https://github.com/rust-lang/rust/pull/24695
4418 [si]: https://github.com/rust-lang/rust/pull/24701
4419 [ap]: https://github.com/rust-lang/rust/pull/24834
4420 [m]: https://github.com/rust-lang/rust/pull/24777
4421 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
4422 [crc]: https://github.com/rust-lang/cargo/pull/1568
4423 [pie]: https://github.com/rust-lang/rust/pull/24953
4424 [abs]: https://github.com/rust-lang/rust/pull/25441
4425 [c]: https://github.com/rust-lang/rust/pull/25496
4426 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
4427 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
4428 [inc]: https://github.com/rust-lang/rust/pull/25522
4429 [bh]: https://github.com/rust-lang/rust/pull/25856
4430 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
4431 [ll]: https://github.com/rust-lang/rust/pull/26022
4432 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
4433 [drop]: https://github.com/rust-lang/rust/pull/24935
4435 Version 1.0.0 (2015-05-15)
4436 ========================
4438 * ~1500 changes, numerous bugfixes
4443 * The vast majority of the standard library is now `#[stable]`. It is
4444 no longer possible to use unstable features with a stable build of
4446 * Many popular crates on [crates.io] now work on the stable release
4448 * Arithmetic on basic integer types now [checks for overflow in debug
4454 * Several [restrictions have been added to trait coherence][coh] in
4455 order to make it easier for upstream authors to change traits
4456 without breaking downstream code.
4457 * Digits of binary and octal literals are [lexed more eagerly][lex] to
4458 improve error messages and macro behavior. For example, `0b1234` is
4459 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
4460 * Trait bounds [are always invariant][inv], eliminating the need for
4461 the `PhantomFn` and `MarkerTrait` lang items, which have been
4463 * ["-" is no longer a valid character in crate names][cr], the `extern crate
4464 "foo" as bar` syntax has been replaced with `extern crate foo as
4465 bar`, and Cargo now automatically translates "-" in *package* names
4466 to underscore for the crate name.
4467 * [Lifetime shadowing is an error][lt].
4468 * [`Send` no longer implies `'static`][send-rfc].
4469 * [UFCS now supports trait-less associated paths][moar-ufcs] like
4470 `MyType::default()`.
4471 * Primitive types [now have inherent methods][prim-inherent],
4472 obviating the need for extension traits like `SliceExt`.
4473 * Methods with `Self: Sized` in their `where` clause are [considered
4474 object-safe][self-sized], allowing many extension traits like
4475 `IteratorExt` to be merged into the traits they extended.
4476 * You can now [refer to associated types][assoc-where] whose
4477 corresponding trait bounds appear only in a `where` clause.
4478 * The final bits of [OIBIT landed][oibit-final], meaning that traits
4479 like `Send` and `Sync` are now library-defined.
4480 * A [Reflect trait][reflect] was introduced, which means that
4481 downcasting via the `Any` trait is effectively limited to concrete
4482 types. This helps retain the potentially-important "parametricity"
4483 property: generic code cannot behave differently for different type
4484 arguments except in minor ways.
4485 * The `unsafe_destructor` feature is now deprecated in favor of the
4486 [new `dropck`][dropck]. This change is a major reduction in unsafe
4492 * The `thread_local` module [has been renamed to `std::thread`][th].
4493 * The methods of `IteratorExt` [have been moved to the `Iterator`
4495 * Several traits that implement Rust's conventions for type
4496 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
4497 [centralized in the `std::convert` module][con].
4498 * The `FromError` trait [was removed in favor of `From`][fe].
4499 * The basic sleep function [has moved to
4500 `std::thread::sleep_ms`][slp].
4501 * The `splitn` function now takes an `n` parameter that represents the
4502 number of items yielded by the returned iterator [instead of the
4503 number of 'splits'][spl].
4504 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
4505 * [Derived implementations of `PartialOrd` now order enums according
4506 to their explicitly-assigned discriminants][po].
4507 * [Methods for searching strings are generic over `Pattern`s][pat],
4508 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
4510 * [In method resolution, object methods are resolved before inherent
4512 * [`String::from_str` has been deprecated in favor of the `From` impl,
4513 `String::from`][sf].
4514 * [`io::Error` implements `Sync`][ios].
4515 * [The `words` method on `&str` has been replaced with
4516 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
4518 * The new path and IO modules are complete and `#[stable]`. This
4519 was the major library focus for this cycle.
4520 * The path API was [revised][path-normalize] to normalize `.`,
4521 adjusting the tradeoffs in favor of the most common usage.
4522 * A large number of remaining APIs in `std` were also stabilized
4523 during this cycle; about 75% of the non-deprecated API surface
4525 * The new [string pattern API][string-pattern] landed, which makes
4526 the string slice API much more internally consistent and flexible.
4527 * A new set of [generic conversion traits][conversion] replaced
4528 many existing ad hoc traits.
4529 * Generic numeric traits were [completely removed][num-traits]. This
4530 was made possible thanks to inherent methods for primitive types,
4531 and the removal gives maximal flexibility for designing a numeric
4532 hierarchy in the future.
4533 * The `Fn` traits are now related via [inheritance][fn-inherit]
4534 and provide ergonomic [blanket implementations][fn-blanket].
4535 * The `Index` and `IndexMut` traits were changed to
4536 [take the index by value][index-value], enabling code like
4537 `hash_map["string"]` to work.
4538 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
4539 `Copy` data is known to be `Clone` as well.
4544 * Many errors now have extended explanations that can be accessed with
4545 the `--explain` flag to `rustc`.
4546 * Many new examples have been added to the standard library
4548 * rustdoc has received a number of improvements focused on completion
4550 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
4551 * Much headway was made on ecosystem-wide CI, making it possible
4552 to [compare builds for breakage][ci-compare].
4555 [crates.io]: http://crates.io
4556 [clo]: https://github.com/rust-lang/rust/pull/24034
4557 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
4558 [con]: https://github.com/rust-lang/rust/pull/23875
4559 [cr]: https://github.com/rust-lang/rust/pull/23419
4560 [fe]: https://github.com/rust-lang/rust/pull/23879
4561 [ie]: https://github.com/rust-lang/rust/pull/23300
4562 [inv]: https://github.com/rust-lang/rust/pull/23938
4563 [ios]: https://github.com/rust-lang/rust/pull/24133
4564 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
4565 [lt]: https://github.com/rust-lang/rust/pull/24057
4566 [meth]: https://github.com/rust-lang/rust/pull/24056
4567 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
4568 [po]: https://github.com/rust-lang/rust/pull/24270
4569 [sf]: https://github.com/rust-lang/rust/pull/24517
4570 [slp]: https://github.com/rust-lang/rust/pull/23949
4571 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
4572 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
4573 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
4574 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
4575 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
4576 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
4577 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
4578 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
4579 [self-sized]: https://github.com/rust-lang/rust/pull/22301
4580 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
4581 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
4582 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
4583 [reflect]: https://github.com/rust-lang/rust/pull/23712
4584 [conversion]: https://github.com/rust-lang/rfcs/pull/529
4585 [num-traits]: https://github.com/rust-lang/rust/pull/23549
4586 [index-value]: https://github.com/rust-lang/rust/pull/23601
4587 [dropck]: https://github.com/rust-lang/rfcs/pull/769
4588 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
4589 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
4590 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
4591 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
4592 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
4595 Version 1.0.0-alpha.2 (2015-02-20)
4596 =====================================
4598 * ~1300 changes, numerous bugfixes
4602 * The various I/O modules were [overhauled][io-rfc] to reduce
4603 unnecessary abstractions and provide better interoperation with
4604 the underlying platform. The old `io` module remains temporarily
4606 * The standard library now [participates in feature gating][feat],
4607 so use of unstable libraries now requires a `#![feature(...)]`
4608 attribute. The impact of this change is [described on the
4609 forum][feat-forum]. [RFC][feat-rfc].
4613 * `for` loops [now operate on the `IntoIterator` trait][into],
4614 which eliminates the need to call `.iter()`, etc. to iterate
4615 over collections. There are some new subtleties to remember
4616 though regarding what sort of iterators various types yield, in
4617 particular that `for foo in bar { }` yields values from a move
4618 iterator, destroying the original collection. [RFC][into-rfc].
4619 * Objects now have [default lifetime bounds][obj], so you don't
4620 have to write `Box<Trait+'static>` when you don't care about
4621 storing references. [RFC][obj-rfc].
4622 * In types that implement `Drop`, [lifetimes must outlive the
4623 value][drop]. This will soon make it possible to safely
4624 implement `Drop` for types where `#[unsafe_destructor]` is now
4625 required. Read the [gorgeous RFC][drop-rfc] for details.
4626 * The fully qualified <T as Trait>::X syntax lets you set the Self
4627 type for a trait method or associated type. [RFC][ufcs-rfc].
4628 * References to types that implement `Deref<U>` now [automatically
4629 coerce to references][deref] to the dereferenced type `U`,
4630 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
4631 should eliminate many unsightly uses of `&*`, as when converting
4632 from references to vectors into references to
4633 slices. [RFC][deref-rfc].
4634 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
4635 `|:|`) is obsolete and closure kind is inferred from context.
4636 * [`Self` is a keyword][Self].
4640 * The `Show` and `String` formatting traits [have been
4641 renamed][fmt] to `Debug` and `Display` to more clearly reflect
4642 their related purposes. Automatically getting a string
4643 conversion to use with `format!("{:?}", something_to_debug)` is
4644 now written `#[derive(Debug)]`.
4645 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
4646 OsStr}`, provide strings in platform-specific encodings for easier
4647 interop with system APIs. [RFC][osstr-rfc].
4648 * The `boxed::into_raw` and `Box::from_raw` functions [convert
4649 between `Box<T>` and `*mut T`][boxraw], a common pattern for
4650 creating raw pointers.
4654 * Certain long error messages of the form 'expected foo found bar'
4655 are now [split neatly across multiple
4656 lines][multiline]. Examples in the PR.
4657 * On Unix Rust can be [uninstalled][un] by running
4658 `/usr/local/lib/rustlib/uninstall.sh`.
4659 * The `#[rustc_on_unimplemented]` attribute, requiring the
4660 'on_unimplemented' feature, lets rustc [display custom error
4661 messages when a trait is expected to be implemented for a type
4666 * Rust is tested against a [LALR grammar][lalr], which parses
4667 almost all the Rust files that rustc does.
4669 [boxraw]: https://github.com/rust-lang/rust/pull/21318
4670 [close]: https://github.com/rust-lang/rust/pull/21843
4671 [deref]: https://github.com/rust-lang/rust/pull/21351
4672 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
4673 [drop]: https://github.com/rust-lang/rust/pull/21972
4674 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4675 [feat]: https://github.com/rust-lang/rust/pull/21248
4676 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
4677 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
4678 [fmt]: https://github.com/rust-lang/rust/pull/21457
4679 [into]: https://github.com/rust-lang/rust/pull/20790
4680 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
4681 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
4682 [lalr]: https://github.com/rust-lang/rust/pull/21452
4683 [multiline]: https://github.com/rust-lang/rust/pull/19870
4684 [obj]: https://github.com/rust-lang/rust/pull/22230
4685 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
4686 [onun]: https://github.com/rust-lang/rust/pull/20889
4687 [osstr]: https://github.com/rust-lang/rust/pull/21488
4688 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
4689 [Self]: https://github.com/rust-lang/rust/pull/22158
4690 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
4691 [un]: https://github.com/rust-lang/rust/pull/22256
4694 Version 1.0.0-alpha (2015-01-09)
4695 ==================================
4697 * ~2400 changes, numerous bugfixes
4701 * The language itself is considered feature complete for 1.0,
4702 though there will be many usability improvements and bugfixes
4703 before the final release.
4704 * Nearly 50% of the public API surface of the standard library has
4705 been declared 'stable'. Those interfaces are unlikely to change
4707 * The long-running debate over integer types has been
4708 [settled][ints]: Rust will ship with types named `isize` and
4709 `usize`, rather than `int` and `uint`, for pointer-sized
4710 integers. Guidelines will be rolled out during the alpha cycle.
4711 * Most crates that are not `std` have been moved out of the Rust
4712 distribution into the Cargo ecosystem so they can evolve
4713 separately and don't need to be stabilized as quickly, including
4714 'time', 'getopts', 'num', 'regex', and 'term'.
4715 * Documentation continues to be expanded with more API coverage, more
4716 examples, and more in-depth explanations. The guides have been
4717 consolidated into [The Rust Programming Language][trpl].
4718 * "[Rust By Example][rbe]" is now maintained by the Rust team.
4719 * All official Rust binary installers now come with [Cargo], the
4720 Rust package manager.
4724 * Closures have been [completely redesigned][unboxed] to be
4725 implemented in terms of traits, can now be used as generic type
4726 bounds and thus monomorphized and inlined, or via an opaque
4727 pointer (boxed) as in the old system. The new system is often
4728 referred to as 'unboxed' closures.
4729 * Traits now support [associated types][assoc], allowing families
4730 of related types to be defined together and used generically in
4732 * Enum variants are [namespaced by their type names][enum].
4733 * [`where` clauses][where] provide a more versatile and attractive
4734 syntax for specifying generic bounds, though the previous syntax
4736 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
4738 * Rust [no longer has a runtime][rt] of any description, and only
4739 supports OS threads, not green threads.
4740 * At long last, Rust has been overhauled for 'dynamically-sized
4741 types' ([DST]), which integrates 'fat pointers' (object types,
4742 arrays, and `str`) more deeply into the type system, making it
4744 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
4745 `..j` that produce range types and which, when combined with the
4746 `Index` operator and multidispatch, leads to a convenient slice
4748 * The new range syntax revealed an ambiguity in the fixed-length
4749 array syntax, so now fixed length arrays [are written `[T;
4751 * The `Copy` trait is no longer implemented automatically. Unsafe
4752 pointers no longer implement `Sync` and `Send` so types
4753 containing them don't automatically either. `Sync` and `Send`
4754 are now 'unsafe traits' so one can "forcibly" implement them via
4755 `unsafe impl` if a type confirms to the requirements for them
4756 even though the internals do not (e.g. structs containing unsafe
4757 pointers like `Arc`). These changes are intended to prevent some
4758 footguns and are collectively known as [opt-in built-in
4759 traits][oibit] (though `Sync` and `Send` will soon become pure
4760 library types unknown to the compiler).
4761 * Operator traits now take their operands [by value][ops], and
4762 comparison traits can use multidispatch to compare one type
4763 against multiple other types, allowing e.g. `String` to be
4764 compared with `&str`.
4765 * `if let` and `while let` are no longer feature-gated.
4766 * Rust has adopted a more [uniform syntax for escaping unicode
4767 characters][unicode].
4768 * `macro_rules!` [has been declared stable][mac]. Though it is a
4769 flawed system it is sufficiently popular that it must be usable
4770 for 1.0. Effort has gone into [future-proofing][mac-future] it
4771 in ways that will allow other macro systems to be developed in
4772 parallel, and won't otherwise impact the evolution of the
4774 * The prelude has been [pared back significantly][prelude] such
4775 that it is the minimum necessary to support the most pervasive
4776 code patterns, and through [generalized where clauses][where]
4777 many of the prelude extension traits have been consolidated.
4778 * Rust's rudimentary reflection [has been removed][refl], as it
4779 incurred too much code generation for little benefit.
4780 * [Struct variants][structvars] are no longer feature-gated.
4781 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
4782 known as 'higher-ranked trait bounds', this crucially allows
4783 unboxed closures to work.
4784 * Macros invocations surrounded by parens or square brackets and
4785 not terminated by a semicolon are [parsed as
4786 expressions][macros], which makes expressions like `vec![1i32,
4787 2, 3].len()` work as expected.
4788 * Trait objects now implement their traits automatically, and
4789 traits that can be coerced to objects now must be [object
4791 * Automatically deriving traits is now done with `#[derive(...)]`
4792 not `#[deriving(...)]` for [consistency with other naming
4793 conventions][derive].
4794 * Importing the containing module or enum at the same time as
4795 items or variants they contain is [now done with `self` instead
4796 of `mod`][self], as in use `foo::{self, bar}`
4797 * Glob imports are no longer feature-gated.
4798 * The `box` operator and `box` patterns have been feature-gated
4799 pending a redesign. For now unique boxes should be allocated
4800 like other containers, with `Box::new`.
4804 * A [series][coll1] of [efforts][coll2] to establish
4805 [conventions][coll3] for collections types has resulted in API
4806 improvements throughout the standard library.
4807 * New [APIs for error handling][err] provide ergonomic interop
4808 between error types, and [new conventions][err-conv] describe
4809 more clearly the recommended error handling strategies in Rust.
4810 * The `fail!` macro has been renamed to [`panic!`][panic] so that
4811 it is easier to discuss failure in the context of error handling
4812 without making clarifications as to whether you are referring to
4813 the 'fail' macro or failure more generally.
4814 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
4815 syscall when available.
4816 * The 'serialize' crate has been renamed 'rustc-serialize' and
4817 moved out of the distribution to Cargo. Although it is widely
4818 used now, it is expected to be superseded in the near future.
4819 * The `Show` formatter, typically implemented with
4820 `#[derive(Show)]` is [now requested with the `{:?}`
4821 specifier][show] and is intended for use by all types, for uses
4822 such as `println!` debugging. The new `String` formatter must be
4823 implemented by hand, uses the `{}` specifier, and is intended
4824 for full-fidelity conversions of things that can logically be
4825 represented as strings.
4829 * [Flexible target specification][flex] allows rustc's code
4830 generation to be configured to support otherwise-unsupported
4832 * Rust comes with rust-gdb and rust-lldb scripts that launch their
4833 respective debuggers with Rust-appropriate pretty-printing.
4834 * The Windows installation of Rust is distributed with the
4835 MinGW components currently required to link binaries on that
4840 * Nullable enum optimizations have been extended to more types so
4841 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
4842 space than the inner types themselves.
4843 * Work has begun on supporting AArch64.
4845 [Cargo]: https://crates.io
4846 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
4847 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
4848 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
4849 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
4850 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
4851 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
4852 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
4853 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
4854 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
4855 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
4856 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
4857 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
4858 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
4859 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
4860 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
4861 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
4862 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
4863 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
4864 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
4865 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
4866 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
4867 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
4868 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
4869 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
4870 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
4871 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
4872 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
4873 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
4874 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
4875 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
4876 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
4877 [trpl]: https://doc.rust-lang.org/book/index.html
4878 [rbe]: http://rustbyexample.com/
4881 Version 0.12.0 (2014-10-09)
4882 =============================
4884 * ~1900 changes, numerous bugfixes
4888 * The introductory documentation (now called The Rust Guide) has
4889 been completely rewritten, as have a number of supplementary
4891 * Rust's package manager, Cargo, continues to improve and is
4892 sometimes considered to be quite awesome.
4893 * Many API's in `std` have been reviewed and updated for
4894 consistency with the in-development Rust coding
4895 guidelines. The standard library documentation tracks
4896 stabilization progress.
4897 * Minor libraries have been moved out-of-tree to the rust-lang org
4898 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
4899 be installed with Cargo.
4900 * Lifetime elision allows lifetime annotations to be left off of
4901 function declarations in many common scenarios.
4902 * Rust now works on 64-bit Windows.
4905 * Indexing can be overloaded with the `Index` and `IndexMut`
4907 * The `if let` construct takes a branch only if the `let` pattern
4908 matches, currently behind the 'if_let' feature gate.
4909 * 'where clauses', a more flexible syntax for specifying trait
4910 bounds that is more aesthetic, have been added for traits and
4911 free functions. Where clauses will in the future make it
4912 possible to constrain associated types, which would be
4913 impossible with the existing syntax.
4914 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
4915 the 'slicing_syntax' feature gate, and can be overloaded with
4916 the `Slice` or `SliceMut` traits.
4917 * The syntax for matching of sub-slices has been changed to use a
4918 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
4919 consistency with other uses of `..` and to future-proof
4920 potential additional uses of the syntax.
4921 * The syntax for matching inclusive ranges in patterns has changed
4922 from `0..3` to `0...4` to be consistent with the exclusive range
4924 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
4925 c]`) has been put behind the 'advanced_slice_patterns' feature
4926 gate and may be removed in the future.
4927 * Components of tuples and tuple structs can be extracted using
4928 the `value.0` syntax, currently behind the `tuple_indexing`
4930 * The `#[crate_id]` attribute is no longer supported; versioning
4931 is handled by the package manager.
4932 * Renaming crate imports are now written `extern crate foo as bar`
4933 instead of `extern crate bar = foo`.
4934 * Renaming use statements are now written `use foo as bar` instead
4936 * `let` and `match` bindings and argument names in macros are now
4938 * The new, more efficient, closure types ('unboxed closures') have
4939 been added under a feature gate, 'unboxed_closures'. These will
4940 soon replace the existing closure types, once higher-ranked
4941 trait lifetimes are added to the language.
4942 * `move` has been added as a keyword, for indicating closures
4943 that capture by value.
4944 * Mutation and assignment is no longer allowed in pattern guards.
4945 * Generic structs and enums can now have trait bounds.
4946 * The `Share` trait is now called `Sync` to free up the term
4947 'shared' to refer to 'shared reference' (the default reference
4949 * Dynamically-sized types have been mostly implemented,
4950 unifying the behavior of fat-pointer types with the rest of the
4952 * As part of dynamically-sized types, the `Sized` trait has been
4953 introduced, which qualifying types implement by default, and
4954 which type parameters expect by default. To specify that a type
4955 parameter does not need to be sized, write `<Sized? T>`. Most
4956 types are `Sized`, notable exceptions being unsized arrays
4957 (`[T]`) and trait types.
4958 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
4959 * Lifetime bounds can now be applied to type parameters and object
4961 * The old, reference counted GC type, `Gc<T>` which was once
4962 denoted by the `@` sigil, has finally been removed. GC will be
4963 revisited in the future.
4966 * Library documentation has been improved for a number of modules.
4967 * Bit-vectors, collections::bitv has been modernized.
4968 * The url crate is deprecated in favor of
4969 http://github.com/servo/rust-url, which can be installed with
4971 * Most I/O stream types can be cloned and subsequently closed from
4973 * A `std::time::Duration` type has been added for use in I/O
4974 methods that rely on timers, as well as in the 'time' crate's
4975 `Timespec` arithmetic.
4976 * The runtime I/O abstraction layer that enabled the green thread
4977 scheduler to do non-thread-blocking I/O has been removed, along
4978 with the libuv-based implementation employed by the green thread
4979 scheduler. This will greatly simplify the future I/O work.
4980 * `collections::btree` has been rewritten to have a more
4981 idiomatic and efficient design.
4984 * rustdoc output now indicates the stability levels of API's.
4985 * The `--crate-name` flag can specify the name of the crate
4986 being compiled, like `#[crate_name]`.
4987 * The `-C metadata` specifies additional metadata to hash into
4988 symbol names, and `-C extra-filename` specifies additional
4989 information to put into the output filename, for use by the
4990 package manager for versioning.
4991 * debug info generation has continued to improve and should be
4992 more reliable under both gdb and lldb.
4993 * rustc has experimental support for compiling in parallel
4994 using the `-C codegen-units` flag.
4995 * rustc no longer encodes rpath information into binaries by
4999 * Stack usage has been optimized with LLVM lifetime annotations.
5000 * Official Rust binaries on Linux are more compatible with older
5001 kernels and distributions, built on CentOS 5.10.
5004 Version 0.11.0 (2014-07-02)
5005 ==========================
5007 * ~1700 changes, numerous bugfixes
5010 * ~[T] has been removed from the language. This type is superseded by
5012 * ~str has been removed from the language. This type is superseded by
5014 * ~T has been removed from the language. This type is superseded by the
5016 * @T has been removed from the language. This type is superseded by the
5017 standard library's std::gc::Gc<T> type.
5018 * Struct fields are now all private by default.
5019 * Vector indices and shift amounts are both required to be a `uint`
5020 instead of any integral type.
5021 * Byte character, byte string, and raw byte string literals are now all
5022 supported by prefixing the normal literal with a `b`.
5023 * Multiple ABIs are no longer allowed in an ABI string
5024 * The syntax for lifetimes on closures/procedures has been tweaked
5025 slightly: `<'a>|A, B|: 'b + K -> T`
5026 * Floating point modulus has been removed from the language; however it
5027 is still provided by a library implementation.
5028 * Private enum variants are now disallowed.
5029 * The `priv` keyword has been removed from the language.
5030 * A closure can no longer be invoked through a &-pointer.
5031 * The `use foo, bar, baz;` syntax has been removed from the language.
5032 * The transmute intrinsic no longer works on type parameters.
5033 * Statics now allow blocks/items in their definition.
5034 * Trait bounds are separated from objects with + instead of : now.
5035 * Objects can no longer be read while they are mutably borrowed.
5036 * The address of a static is now marked as insignificant unless the
5037 #[inline(never)] attribute is placed it.
5038 * The #[unsafe_destructor] attribute is now behind a feature gate.
5039 * Struct literals are no longer allowed in ambiguous positions such as
5040 if, while, match, and for..in.
5041 * Declaration of lang items and intrinsics are now feature-gated by
5043 * Integral literals no longer default to `int`, and floating point
5044 literals no longer default to `f64`. Literals must be suffixed with an
5045 appropriate type if inference cannot determine the type of the
5047 * The Box<T> type is no longer implicitly borrowed to &mut T.
5048 * Procedures are now required to not capture borrowed references.
5051 * The standard library is now a "facade" over a number of underlying
5052 libraries. This means that development on the standard library should
5053 be speedier due to smaller crates, as well as a clearer line between
5055 * A new library, libcore, lives under the standard library's facade
5056 which is Rust's "0-assumption" library, suitable for embedded and
5057 kernel development for example.
5058 * A regex crate has been added to the standard distribution. This crate
5059 includes statically compiled regular expressions.
5060 * The unwrap/unwrap_err methods on Result require a Show bound for
5061 better error messages.
5062 * The return types of the std::comm primitives have been centralized
5063 around the Result type.
5064 * A number of I/O primitives have gained the ability to time out their
5066 * A number of I/O primitives have gained the ability to close their
5067 reading/writing halves to cancel pending operations.
5068 * Reverse iterator methods have been removed in favor of `rev()` on
5069 their forward-iteration counterparts.
5070 * A bitflags! macro has been added to enable easy interop with C and
5071 management of bit flags.
5072 * A debug_assert! macro is now provided which is disabled when
5073 `--cfg ndebug` is passed to the compiler.
5074 * A graphviz crate has been added for creating .dot files.
5075 * The std::cast module has been migrated into std::mem.
5076 * The std::local_data api has been migrated from freestanding functions
5077 to being based on methods.
5078 * The Pod trait has been renamed to Copy.
5079 * jemalloc has been added as the default allocator for types.
5080 * The API for allocating memory has been changed to use proper alignment
5081 and sized deallocation
5082 * Connecting a TcpStream or binding a TcpListener is now based on a
5083 string address and a u16 port. This allows connecting to a hostname as
5085 * The Reader trait now contains a core method, read_at_least(), which
5086 correctly handles many repeated 0-length reads.
5087 * The process-spawning API is now centered around a builder-style
5089 * The :? printing qualifier has been moved from the standard library to
5090 an external libdebug crate.
5091 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
5092 have been renamed to Eq/Ord.
5093 * The select/plural methods have been removed from format!. The escapes
5094 for { and } have also changed from \{ and \} to {{ and }},
5096 * The TaskBuilder API has been re-worked to be a true builder, and
5097 extension traits for spawning native/green tasks have been added.
5100 * All breaking changes to the language or libraries now have their
5101 commit message annotated with `[breaking-change]` to allow for easy
5102 discovery of breaking changes.
5103 * The compiler will now try to suggest how to annotate lifetimes if a
5104 lifetime-related error occurs.
5105 * Debug info continues to be improved greatly with general bug fixes and
5106 better support for situations like link time optimization (LTO).
5107 * Usage of syntax extensions when cross-compiling has been fixed.
5108 * Functionality equivalent to GCC & Clang's -ffunction-sections,
5109 -fdata-sections and --gc-sections has been enabled by default
5110 * The compiler is now stricter about where it will load module files
5111 from when a module is declared via `mod foo;`.
5112 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
5113 Syntax extensions are now discovered via a "plugin registrar" type
5114 which will be extended in the future to other various plugins.
5115 * Lints have been restructured to allow for dynamically loadable lints.
5116 * A number of rustdoc improvements:
5117 * The HTML output has been visually redesigned.
5118 * Markdown is now powered by hoedown instead of sundown.
5119 * Searching heuristics have been greatly improved.
5120 * The search index has been reduced in size by a great amount.
5121 * Cross-crate documentation via `pub use` has been greatly improved.
5122 * Primitive types are now hyperlinked and documented.
5123 * Documentation has been moved from static.rust-lang.org/doc to
5125 * A new sandbox, play.rust-lang.org, is available for running and
5126 sharing rust code examples on-line.
5127 * Unused attributes are now more robustly warned about.
5128 * The dead_code lint now warns about unused struct fields.
5129 * Cross-compiling to iOS is now supported.
5130 * Cross-compiling to mipsel is now supported.
5131 * Stability attributes are now inherited by default and no longer apply
5132 to intra-crate usage, only inter-crate usage.
5133 * Error message related to non-exhaustive match expressions have been
5137 Version 0.10 (2014-04-03)
5138 =========================
5140 * ~1500 changes, numerous bugfixes
5143 * A new RFC process is now in place for modifying the language.
5144 * Patterns with `@`-pointers have been removed from the language.
5145 * Patterns with unique vectors (`~[T]`) have been removed from the
5147 * Patterns with unique strings (`~str`) have been removed from the
5149 * `@str` has been removed from the language.
5150 * `@[T]` has been removed from the language.
5151 * `@self` has been removed from the language.
5152 * `@Trait` has been removed from the language.
5153 * Headers on `~` allocations which contain `@` boxes inside the type for
5154 reference counting have been removed.
5155 * The semantics around the lifetimes of temporary expressions have changed,
5156 see #3511 and #11585 for more information.
5157 * Cross-crate syntax extensions are now possible, but feature gated. See
5158 #11151 for more information. This includes both `macro_rules!` macros as
5159 well as syntax extensions such as `format!`.
5160 * New lint modes have been added, and older ones have been turned on to be
5162 * Unnecessary parentheses
5165 * Uppercase variables
5166 * Publicly visible private types
5167 * `#[deriving]` with raw pointers
5168 * Unsafe functions can no longer be coerced to closures.
5169 * Various obscure macros such as `log_syntax!` are now behind feature gates.
5170 * The `#[simd]` attribute is now behind a feature gate.
5171 * Visibility is no longer allowed on `extern crate` statements, and
5172 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
5173 * Trailing commas are now allowed in argument lists and tuple patterns.
5174 * The `do` keyword has been removed, it is now a reserved keyword.
5175 * Default type parameters have been implemented, but are feature gated.
5176 * Borrowed variables through captures in closures are now considered soundly.
5177 * `extern mod` is now `extern crate`
5178 * The `Freeze` trait has been removed.
5179 * The `Share` trait has been added for types that can be shared among
5181 * Labels in macros are now hygienic.
5182 * Expression/statement macro invocations can be delimited with `{}` now.
5183 * Treatment of types allowed in `static mut` locations has been tweaked.
5184 * The `*` and `.` operators are now overloadable through the `Deref` and
5186 * `~Trait` and `proc` no longer have `Send` bounds by default.
5187 * Partial type hints are now supported with the `_` type marker.
5188 * An `Unsafe` type was introduced for interior mutability. It is now
5189 considered undefined to transmute from `&T` to `&mut T` without using the
5191 * The #[linkage] attribute was implemented for extern statics/functions.
5192 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
5193 * `Pod` was renamed to `Copy`.
5196 * The `libextra` library has been removed. It has now been decomposed into
5197 component libraries with smaller and more focused nuggets of
5198 functionality. The full list of libraries can be found on the
5199 documentation index page.
5200 * std: `std::condition` has been removed. All I/O errors are now propagated
5201 through the `Result` type. In order to assist with error handling, a
5202 `try!` macro for unwrapping errors with an early return and a lint for
5203 unused results has been added. See #12039 for more information.
5204 * std: The `vec` module has been renamed to `slice`.
5205 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
5206 This will become the only growable vector in the future.
5207 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
5208 are now found at `std::io::BufferedReader` instead of
5209 `std::io::buffered::BufferedReader`.
5210 * std: `print` and `println` are no longer in the prelude, the `print!` and
5211 `println!` macros are intended to be used instead.
5212 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
5213 attempts to statically prevent cycles.
5214 * std: The standard distribution is adopting the policy of pushing failure
5215 to the user rather than failing in libraries. Many functions (such as
5216 `slice::last()`) now return `Option<T>` instead of `T` + failing.
5217 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
5218 deriving mode: `#[deriving(Show)]`.
5219 * std: `ToStr` is now implemented for all types implementing `Show`.
5220 * std: The formatting trait methods now take `&self` instead of `&T`
5221 * std: The `invert()` method on iterators has been renamed to `rev()`
5222 * std: `std::num` has seen a reduction in the genericity of its traits,
5223 consolidating functionality into a few core traits.
5224 * std: Backtraces are now printed on task failure if the environment
5225 variable `RUST_BACKTRACE` is present.
5226 * std: Naming conventions for iterators have been standardized. More details
5227 can be found on the wiki's style guide.
5228 * std: `eof()` has been removed from the `Reader` trait. Specific types may
5229 still implement the function.
5230 * std: Networking types are now cloneable to allow simultaneous reads/writes.
5231 * std: `assert_approx_eq!` has been removed
5232 * std: The `e` and `E` formatting specifiers for floats have been added to
5233 print them in exponential notation.
5234 * std: The `Times` trait has been removed
5235 * std: Indications of variance and opting out of builtin bounds is done
5236 through marker types in `std::kinds::marker` now
5237 * std: `hash` has been rewritten, `IterBytes` has been removed, and
5238 `#[deriving(Hash)]` is now possible.
5239 * std: `SharedChan` has been removed, `Sender` is now cloneable.
5240 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
5241 * std: `Chan::new` is now `channel()`.
5242 * std: A new synchronous channel type has been implemented.
5243 * std: A `select!` macro is now provided for selecting over `Receiver`s.
5244 * std: `hashmap` and `trie` have been moved to `libcollections`
5245 * std: `run` has been rolled into `io::process`
5246 * std: `assert_eq!` now uses `{}` instead of `{:?}`
5247 * std: The equality and comparison traits have seen some reorganization.
5248 * std: `rand` has moved to `librand`.
5249 * std: `to_{lower,upper}case` has been implemented for `char`.
5250 * std: Logging has been moved to `liblog`.
5251 * collections: `HashMap` has been rewritten for higher performance and less
5253 * native: The default runtime is now `libnative`. If `libgreen` is desired,
5254 it can be booted manually. The runtime guide has more information and
5256 * native: All I/O functionality except signals has been implemented.
5257 * green: Task spawning with `libgreen` has been optimized with stack caching
5258 and various trimming of code.
5259 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
5260 * sync: The `extra::sync` module has been updated to modern rust (and moved
5261 to the `sync` library), tweaking and improving various interfaces while
5262 dropping redundant functionality.
5263 * sync: A new `Barrier` type has been added to the `sync` library.
5264 * sync: An efficient mutex for native and green tasks has been implemented.
5265 * serialize: The `base64` module has seen some improvement. It treats
5266 newlines better, has non-string error values, and has seen general
5268 * fourcc: A `fourcc!` macro was introduced
5269 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
5270 hexadecimal literal.
5273 * `rustpkg` has been deprecated and removed from the main repository. Its
5274 replacement, `cargo`, is under development.
5275 * Nightly builds of rust are now available
5276 * The memory usage of rustc has been improved many times throughout this
5278 * The build process supports disabling rpath support for the rustc binary
5280 * Code generation has improved in some cases, giving more information to the
5281 LLVM optimization passes to enable more extensive optimizations.
5282 * Debuginfo compatibility with lldb on OSX has been restored.
5283 * The master branch is now gated on an android bot, making building for
5284 android much more reliable.
5285 * Output flags have been centralized into one `--emit` flag.
5286 * Crate type flags have been centralized into one `--crate-type` flag.
5287 * Codegen flags have been consolidated behind a `-C` flag.
5288 * Linking against outdated crates now has improved error messages.
5289 * Error messages with lifetimes will often suggest how to annotate the
5290 function to fix the error.
5291 * Many more types are documented in the standard library, and new guides
5293 * Many `rustdoc` improvements:
5294 * code blocks are syntax highlighted.
5295 * render standalone markdown files.
5296 * the --test flag tests all code blocks by default.
5297 * exported macros are displayed.
5298 * re-exported types have their documentation inlined at the location of the
5300 * search works across crates that have been rendered to the same output
5304 Version 0.9 (2014-01-09)
5305 ==========================
5307 * ~1800 changes, numerous bugfixes
5310 * The `float` type has been removed. Use `f32` or `f64` instead.
5311 * A new facility for enabling experimental features (feature gating) has
5312 been added, using the crate-level `#[feature(foo)]` attribute.
5313 * Managed boxes (@) are now behind a feature gate
5314 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
5315 standard library's `Gc` or `Rc` types instead.
5316 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
5317 * Jumping back to the top of a loop is now done with `continue` instead of
5319 * Strings can no longer be mutated through index assignment.
5320 * Raw strings can be created via the basic `r"foo"` syntax or with matched
5321 hash delimiters, as in `r###"foo"###`.
5322 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
5324 * The `&fn` type is now written `|args| -> ret` to match the literal form.
5325 * `@fn`s have been removed.
5326 * `do` only works with procs in order to make it obvious what the cost
5328 * Single-element tuple-like structs can no longer be dereferenced to
5329 obtain the inner value. A more comprehensive solution for overloading
5330 the dereference operator will be provided in the future.
5331 * The `#[link(...)]` attribute has been replaced with
5332 `#[crate_id = "name#vers"]`.
5333 * Empty `impl`s must be terminated with empty braces and may not be
5334 terminated with a semicolon.
5335 * Keywords are no longer allowed as lifetime names; the `self` lifetime
5336 no longer has any special meaning.
5337 * The old `fmt!` string formatting macro has been removed.
5338 * `printf!` and `printfln!` (old-style formatting) removed in favor of
5339 `print!` and `println!`.
5340 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
5341 * The `extern mod foo (name = "bar")` syntax has been removed. Use
5342 `extern mod foo = "bar"` instead.
5343 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
5344 * Macros can have attributes.
5345 * Macros can expand to items with attributes.
5346 * Macros can expand to multiple items.
5347 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
5348 * Comments may be nested.
5349 * Values automatically coerce to trait objects they implement, without
5351 * Enum discriminants are no longer an entire word but as small as needed to
5352 contain all the variants. The `repr` attribute can be used to override
5353 the discriminant size, as in `#[repr(int)]` for integer-sized, and
5354 `#[repr(C)]` to match C enums.
5355 * Non-string literals are not allowed in attributes (they never worked).
5356 * The FFI now supports variadic functions.
5357 * Octal numeric literals, as in `0o7777`.
5358 * The `concat!` syntax extension performs compile-time string concatenation.
5359 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
5360 removed as Rust no longer uses segmented stacks.
5361 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
5362 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
5363 not `*`; ignoring remaining fields of a struct is also done with `..`,
5364 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
5365 * `rustc` supports the "win64" calling convention via `extern "win64"`.
5366 * `rustc` supports the "system" calling convention, which defaults to the
5367 preferred convention for the target platform, "stdcall" on 32-bit Windows,
5369 * The `type_overflow` lint (default: warn) checks literals for overflow.
5370 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
5371 * The `attribute_usage` lint (default: warn) warns about unknown
5373 * The `unknown_features` lint (default: warn) warns about unknown
5375 * The `dead_code` lint (default: warn) checks for dead code.
5376 * Rust libraries can be linked statically to one another
5377 * `#[link_args]` is behind the `link_args` feature gate.
5378 * Native libraries are now linked with `#[link(name = "foo")]`
5379 * Native libraries can be statically linked to a rust crate
5380 (`#[link(name = "foo", kind = "static")]`).
5381 * Native OS X frameworks are now officially supported
5382 (`#[link(name = "foo", kind = "framework")]`).
5383 * The `#[thread_local]` attribute creates thread-local (not task-local)
5384 variables. Currently behind the `thread_local` feature gate.
5385 * The `return` keyword may be used in closures.
5386 * Types that can be copied via a memcpy implement the `Pod` kind.
5387 * The `cfg` attribute can now be used on struct fields and enum variants.
5390 * std: The `option` and `result` API's have been overhauled to make them
5391 simpler, more consistent, and more composable.
5392 * std: The entire `std::io` module has been replaced with one that is
5393 more comprehensive and that properly interfaces with the underlying
5394 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
5396 * std: `io::util` contains a number of useful implementations of
5397 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
5398 `ZeroReader`, `TeeReader`.
5399 * std: The reference counted pointer type `extra::rc` moved into std.
5400 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
5401 just a wrapper around it).
5402 * std: The `Either` type has been removed.
5403 * std: `fmt::Default` can be implemented for any type to provide default
5404 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
5405 * std: The `rand` API continues to be tweaked.
5406 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
5407 on failure in gdb, is now named `rust_fail`.
5408 * std: The `each_key` and `each_value` methods on `HashMap` have been
5409 replaced by the `keys` and `values` iterators.
5410 * std: Functions dealing with type size and alignment have moved from the
5411 `sys` module to the `mem` module.
5412 * std: The `path` module was written and API changed.
5413 * std: `str::from_utf8` has been changed to cast instead of allocate.
5414 * std: `starts_with` and `ends_with` methods added to vectors via the
5415 `ImmutableEqVector` trait, which is in the prelude.
5416 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
5417 if the index is out of bounds.
5418 * std: Task failure no longer propagates between tasks, as the model was
5419 complex, expensive, and incompatible with thread-based tasks.
5420 * std: The `Any` type can be used for dynamic typing.
5421 * std: `~Any` can be passed to the `fail!` macro and retrieved via
5423 * std: Methods that produce iterators generally do not have an `_iter`
5425 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
5426 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
5427 * std: `util::ignore` renamed to `prelude::drop`.
5428 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
5430 * std: `vec::raw` has seen a lot of cleanup and API changes.
5431 * std: The standard library no longer includes any C++ code, and very
5432 minimal C, eliminating the dependency on libstdc++.
5433 * std: Runtime scheduling and I/O functionality has been factored out into
5434 extensible interfaces and is now implemented by two different crates:
5435 libnative, for native threading and I/O; and libgreen, for green threading
5436 and I/O. This paves the way for using the standard library in more limited
5437 embedded environments.
5438 * std: The `comm` module has been rewritten to be much faster, have a
5439 simpler, more consistent API, and to work for both native and green
5441 * std: All libuv dependencies have been moved into the rustuv crate.
5442 * native: New implementations of runtime scheduling on top of OS threads.
5443 * native: New native implementations of TCP, UDP, file I/O, process spawning,
5445 * green: The green thread scheduler and message passing types are almost
5447 * extra: The `flatpipes` module had bitrotted and was removed.
5448 * extra: All crypto functions have been removed and Rust now has a policy of
5449 not reimplementing crypto in the standard library. In the future crypto
5450 will be provided by external crates with bindings to established libraries.
5451 * extra: `c_vec` has been modernized.
5452 * extra: The `sort` module has been removed. Use the `sort` method on
5456 * The `rust` and `rusti` commands have been removed, due to lack of
5458 * `rustdoc` was completely rewritten.
5459 * `rustdoc` can test code examples in documentation.
5460 * `rustpkg` can test packages with the argument, 'test'.
5461 * `rustpkg` supports arbitrary dependencies, including C libraries.
5462 * `rustc`'s support for generating debug info is improved again.
5463 * `rustc` has better error reporting for unbalanced delimiters.
5464 * `rustc`'s JIT support was removed due to bitrot.
5465 * Executables and static libraries can be built with LTO (-Z lto)
5466 * `rustc` adds a `--dep-info` flag for communicating dependencies to
5470 Version 0.8 (2013-09-26)
5471 ============================
5473 * ~2200 changes, numerous bugfixes
5476 * The `for` loop syntax has changed to work with the `Iterator` trait.
5477 * At long last, unwinding works on Windows.
5478 * Default methods are ready for use.
5479 * Many trait inheritance bugs fixed.
5480 * Owned and borrowed trait objects work more reliably.
5481 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
5482 * rustc can omit emission of code for the `debug!` macro if it is passed
5484 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
5485 for foo.rs, then foo/mod.rs, and will generate an error when both are
5487 * Strings no longer contain trailing nulls. The new `std::c_str` module
5488 provides new mechanisms for converting to C strings.
5489 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
5490 * The FFI has been overhauled such that foreign functions are called directly,
5491 instead of through a stack-switching wrapper.
5492 * Calling a foreign function must be done through a Rust function with the
5493 `#[fixed_stack_segment]` attribute.
5494 * The `externfn!` macro can be used to declare both a foreign function and
5495 a `#[fixed_stack_segment]` wrapper at once.
5496 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
5497 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
5498 * `priv` is disallowed everywhere except for struct fields and enum variants.
5499 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
5500 * `ref` bindings in irrefutable patterns work correctly now.
5501 * `char` is now prevented from containing invalid code points.
5502 * Casting to `bool` is no longer allowed.
5503 * `\0` is now accepted as an escape in chars and strings.
5504 * `yield` is a reserved keyword.
5505 * `typeof` is a reserved keyword.
5506 * Crates may be imported by URL with `extern mod foo = "url";`.
5507 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
5508 * Static vectors can be initialized with repeating elements,
5509 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
5510 * Static structs can be initialized with functional record update,
5511 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
5512 * `cfg!` can be used to conditionally execute code based on the crate
5513 configuration, similarly to `#[cfg(...)]`.
5514 * The `unnecessary_qualification` lint detects unneeded module
5515 prefixes (default: allow).
5516 * Arithmetic operations have been implemented on the SIMD types in
5517 `std::unstable::simd`.
5518 * Exchange allocation headers were removed, reducing memory usage.
5519 * `format!` implements a completely new, extensible, and higher-performance
5520 string formatting system. It will replace `fmt!`.
5521 * `print!` and `println!` write formatted strings (using the `format!`
5522 extension) to stdout.
5523 * `write!` and `writeln!` write formatted strings (using the `format!`
5524 extension) to the new Writers in `std::rt::io`.
5525 * The library section in which a function or static is placed may
5526 be specified with `#[link_section = "..."]`.
5527 * The `proto!` syntax extension for defining bounded message protocols
5529 * `macro_rules!` is hygienic for `let` declarations.
5530 * The `#[export_name]` attribute specifies the name of a symbol.
5531 * `unreachable!` can be used to indicate unreachable code, and fails
5535 * std: Transitioned to the new runtime, written in Rust.
5536 * std: Added an experimental I/O library, `rt::io`, based on the new
5538 * std: A new generic `range` function was added to the prelude, replacing
5539 `uint::range` and friends.
5540 * std: `range_rev` no longer exists. Since range is an iterator it can be
5541 reversed with `range(lo, hi).invert()`.
5542 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
5543 renamed to `unwrap_or`.
5544 * std: The `iterator` module was renamed to `iter`.
5545 * std: Integral types now support the `checked_add`, `checked_sub`, and
5546 `checked_mul` operations for detecting overflow.
5547 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
5549 * std: Methods are standardizing on conventions for casting methods:
5550 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
5552 * std: The `CString` type in `c_str` provides new ways to convert to and
5554 * std: `DoubleEndedIterator` can yield elements in two directions.
5555 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
5557 * std: `str::from_bytes` renamed to `str::from_utf8`.
5558 * std: `pop_opt` and `shift_opt` methods added to vectors.
5559 * std: The task-local data interface no longer uses @, and keys are
5560 no longer function pointers.
5561 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
5562 * std: Added `SharedPort` to `comm`.
5563 * std: `Eq` has a default method for `ne`; only `eq` is required
5565 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
5566 is required in implementations.
5567 * std: `is_utf8` performance is improved, impacting many string functions.
5568 * std: `os::MemoryMap` provides cross-platform mmap.
5569 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
5570 are not 'in-bounds' are considered undefined.
5571 * std: Many freestanding functions in `vec` removed in favor of methods.
5572 * std: Many freestanding functions on scalar types removed in favor of
5574 * std: Many options to task builders were removed since they don't make
5575 sense in the new scheduler design.
5576 * std: More containers implement `FromIterator` so can be created by the
5578 * std: More complete atomic types in `unstable::atomics`.
5579 * std: `comm::PortSet` removed.
5580 * std: Mutating methods in the `Set` and `Map` traits have been moved into
5581 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
5582 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
5583 default implementations.
5584 * std: Various `from_str` functions were removed in favor of a generic
5585 `from_str` which is available in the prelude.
5586 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
5587 * extra: `dlist`, the doubly-linked list was modernized.
5588 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
5589 * extra: Added `glob` module, replacing `std::os::glob`.
5590 * extra: `rope` was removed.
5591 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
5592 * extra: `net`, and `timer` were removed. The experimental replacements
5593 are `std::rt::io::net` and `std::rt::io::timer`.
5594 * extra: Iterators implemented for `SmallIntMap`.
5595 * extra: Iterators implemented for `Bitv` and `BitvSet`.
5596 * extra: `SmallIntSet` removed. Use `BitvSet`.
5597 * extra: Performance of JSON parsing greatly improved.
5598 * extra: `semver` updated to SemVer 2.0.0.
5599 * extra: `term` handles more terminals correctly.
5600 * extra: `dbg` module removed.
5601 * extra: `par` module removed.
5602 * extra: `future` was cleaned up, with some method renames.
5603 * extra: Most free functions in `getopts` were converted to methods.
5606 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
5607 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
5608 similarly to gcc's `--march` flag.
5609 * rustc's performance compiling small crates is much better.
5610 * rustpkg has received many improvements.
5611 * rustpkg supports git tags as package IDs.
5612 * rustpkg builds into target-specific directories so it can be used for
5614 * The number of concurrent test tasks is controlled by the environment
5615 variable RUST_TEST_TASKS.
5616 * The test harness can now report metrics for benchmarks.
5617 * All tools have man pages.
5618 * Programs compiled with `--test` now support the `-h` and `--help` flags.
5619 * The runtime uses jemalloc for allocations.
5620 * Segmented stacks are temporarily disabled as part of the transition to
5621 the new runtime. Stack overflows are possible!
5622 * A new documentation backend, rustdoc_ng, is available for use. It is
5623 still invoked through the normal `rustdoc` command.
5626 Version 0.7 (2013-07-03)
5627 =======================
5629 * ~2000 changes, numerous bugfixes
5632 * `impl`s no longer accept a visibility qualifier. Put them on methods
5634 * The borrow checker has been rewritten with flow-sensitivity, fixing
5635 many bugs and inconveniences.
5636 * The `self` parameter no longer implicitly means `&'self self`,
5637 and can be explicitly marked with a lifetime.
5638 * Overloadable compound operators (`+=`, etc.) have been temporarily
5639 removed due to bugs.
5640 * The `for` loop protocol now requires `for`-iterators to return `bool`
5641 so they compose better.
5642 * The `Durable` trait is replaced with the `'static` bounds.
5643 * Trait default methods work more often.
5644 * Structs with the `#[packed]` attribute have byte alignment and
5645 no padding between fields.
5646 * Type parameters bound by `Copy` must now be copied explicitly with
5648 * It is now illegal to move out of a dereferenced unsafe pointer.
5649 * `Option<~T>` is now represented as a nullable pointer.
5650 * `@mut` does dynamic borrow checks correctly.
5651 * The `main` function is only detected at the topmost level of the crate.
5652 The `#[main]` attribute is still valid anywhere.
5653 * Struct fields may no longer be mutable. Use inherited mutability.
5654 * The `#[no_send]` attribute makes a type that would otherwise be
5656 * The `#[no_freeze]` attribute makes a type that would otherwise be
5658 * Unbounded recursion will abort the process after reaching the limit
5659 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
5660 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
5661 are never implicitly copyable.
5662 * `#[static_assert]` makes compile-time assertions about static bools.
5663 * At long last, 'argument modes' no longer exist.
5664 * The rarely used `use mod` statement no longer exists.
5667 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
5669 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
5670 `Rand`, `Zero` and `ToStr` can all be automatically derived with
5672 * The `bytes!` macro returns a vector of bytes for string, u8, char,
5673 and unsuffixed integer literals.
5676 * The `core` crate was renamed to `std`.
5677 * The `std` crate was renamed to `extra`.
5678 * More and improved documentation.
5679 * std: `iterator` module for external iterator objects.
5680 * Many old-style (internal, higher-order function) iterators replaced by
5681 implementations of `Iterator`.
5682 * std: Many old internal vector and string iterators,
5683 incl. `any`, `all`. removed.
5684 * std: The `finalize` method of `Drop` renamed to `drop`.
5685 * std: The `drop` method now takes `&mut self` instead of `&self`.
5686 * std: The prelude no longer re-exports any modules, only types and traits.
5687 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
5688 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
5689 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
5690 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
5691 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
5692 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
5693 * std: Many types implement `Clone`.
5694 * std: `path` type renamed to `Path`.
5695 * std: `mut` module and `Mut` type removed.
5696 * std: Many standalone functions removed in favor of methods and iterators
5697 in `vec`, `str`. In the future methods will also work as functions.
5698 * std: `reinterpret_cast` removed. Use `transmute`.
5699 * std: ascii string handling in `std::ascii`.
5700 * std: `Rand` is implemented for ~/@.
5701 * std: `run` module for spawning processes overhauled.
5702 * std: Various atomic types added to `unstable::atomic`.
5703 * std: Various types implement `Zero`.
5704 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
5705 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
5706 * std: Added `os::mkdir_recursive`.
5707 * std: Added `os::glob` function performs filesystems globs.
5708 * std: `FuzzyEq` renamed to `ApproxEq`.
5709 * std: `Map` now defines `pop` and `swap` methods.
5710 * std: `Cell` constructors converted to static methods.
5711 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
5712 * extra: `flate` module moved from `std` to `extra`.
5713 * extra: `fileinput` module for iterating over a series of files.
5714 * extra: `Complex` number type and `complex` module.
5715 * extra: `Rational` number type and `rational` module.
5716 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
5717 * extra: `term` uses terminfo now, is more correct.
5718 * extra: `arc` functions converted to methods.
5719 * extra: Implementation of fixed output size variations of SHA-2.
5722 * `unused_variable` lint mode for unused variables (default: warn).
5723 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
5725 * `unused_mut` lint mode for identifying unused `mut` qualifiers
5727 * `dead_assignment` lint mode for unread variables (default: warn).
5728 * `unnecessary_allocation` lint mode detects some heap allocations that are
5729 immediately borrowed so could be written without allocating (default: warn).
5730 * `missing_doc` lint mode (default: allow).
5731 * `unreachable_code` lint mode (default: warn).
5732 * The `rusti` command has been rewritten and a number of bugs addressed.
5733 * rustc outputs in color on more terminals.
5734 * rustc accepts a `--link-args` flag to pass arguments to the linker.
5735 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
5736 * Compiling with `-g` will make the binary record information about
5737 dynamic borrowcheck failures for debugging.
5738 * rustdoc has a nicer stylesheet.
5739 * Various improvements to rustdoc.
5740 * Improvements to rustpkg (see the detailed release notes).
5743 Version 0.6 (2013-04-03)
5744 ========================
5746 * ~2100 changes, numerous bugfixes
5749 * The self type parameter in traits is now spelled `Self`
5750 * The `self` parameter in trait and impl methods must now be explicitly
5751 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
5752 * Static methods no longer require the `static` keyword and instead
5753 are distinguished by the lack of a `self` parameter
5754 * Replaced the `Durable` trait with the `'static` lifetime
5755 * The old closure type syntax with the trailing sigil has been
5756 removed in favor of the more consistent leading sigil
5757 * `super` is a keyword, and may be prefixed to paths
5758 * Trait bounds are separated with `+` instead of whitespace
5759 * Traits are implemented with `impl Trait for Type`
5760 instead of `impl Type: Trait`
5761 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
5762 * The `export` keyword has finally been removed
5763 * The `move` keyword has been removed (see "Semantic changes")
5764 * The interior mutability qualifier on vectors, `[mut T]`, has been
5765 removed. Use `&mut [T]`, etc.
5766 * `mut` is no longer valid in `~mut T`. Use inherited mutability
5767 * `fail` is no longer a keyword. Use `fail!()`
5768 * `assert` is no longer a keyword. Use `assert!()`
5769 * `log` is no longer a keyword. use `debug!`, etc.
5770 * 1-tuples may be represented as `(T,)`
5771 * Struct fields may no longer be `mut`. Use inherited mutability,
5772 `@mut T`, `core::mut` or `core::cell`
5773 * `extern mod { ... }` is no longer valid syntax for foreign
5774 function modules. Use extern blocks: `extern { ... }`
5775 * Newtype enums removed. Use tuple-structs.
5776 * Trait implementations no longer support visibility modifiers
5777 * Pattern matching over vectors improved and expanded
5778 * `const` renamed to `static` to correspond to lifetime name,
5779 and make room for future `static mut` unsafe mutable globals.
5780 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
5781 * `Clone` implementations can be automatically generated with
5782 `#[deriving(Clone)]`
5783 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
5784 instead of `foo as Bar`.
5785 * Fixed length vector types are now written as `[int, .. 3]`
5786 instead of `[int * 3]`.
5787 * Fixed length vector types can express the length as a constant
5788 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
5791 * Types with owned pointers or custom destructors move by default,
5792 eliminating the `move` keyword
5793 * All foreign functions are considered unsafe
5794 * &mut is now unaliasable
5795 * Writes to borrowed @mut pointers are prevented dynamically
5797 * The name of the main function can be customized using #[main]
5798 * The default type of an inferred closure is &fn instead of @fn
5799 * `use` statements may no longer be "chained" - they cannot import
5800 identifiers imported by previous `use` statements
5801 * `use` statements are crate relative, importing from the "top"
5802 of the crate by default. Paths may be prefixed with `super::`
5803 or `self::` to change the search behavior.
5804 * Method visibility is inherited from the implementation declaration
5805 * Structural records have been removed
5806 * Many more types can be used in static items, including enums
5807 'static-lifetime pointers and vectors
5808 * Pattern matching over vectors improved and expanded
5809 * Typechecking of closure types has been overhauled to
5810 improve inference and eliminate unsoundness
5811 * Macros leave scope at the end of modules, unless that module is
5812 tagged with #[macro_escape]
5815 * Added big integers to `std::bigint`
5816 * Removed `core::oldcomm` module
5817 * Added pipe-based `core::comm` module
5818 * Numeric traits have been reorganized under `core::num`
5819 * `vec::slice` finally returns a slice
5820 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
5821 * Containers reorganized around traits in `core::container`
5822 * `core::dvec` removed, `~[T]` is a drop-in replacement
5823 * `core::send_map` renamed to `core::hashmap`
5824 * `std::map` removed; replaced with `core::hashmap`
5825 * `std::treemap` reimplemented as an owned balanced tree
5826 * `std::deque` and `std::smallintmap` reimplemented as owned containers
5827 * `core::trie` added as a fast ordered map for integer keys
5828 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
5829 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
5830 overload the comparison operators, whereas `TotalOrd` is used
5831 by certain container types
5834 * Replaced the 'cargo' package manager with 'rustpkg'
5835 * Added all-purpose 'rust' tool
5836 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
5837 * rustc now *attempts* to offer spelling suggestions
5838 * Improved support for ARM and Android
5839 * Preliminary MIPS backend
5840 * Improved foreign function ABI implementation for x86, x86_64
5841 * Various memory usage improvements
5842 * Rust code may be embedded in foreign code under limited circumstances
5843 * Inline assembler supported by new asm!() syntax extension.
5846 Version 0.5 (2012-12-21)
5847 ===========================
5849 * ~900 changes, numerous bugfixes
5852 * Removed `<-` move operator
5853 * Completed the transition from the `#fmt` extension syntax to `fmt!`
5854 * Removed old fixed length vector syntax - `[T]/N`
5855 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
5856 * Macros may now expand to items and statements
5857 * `a.b()` is always parsed as a method call, never as a field projection
5858 * `Eq` and `IterBytes` implementations can be automatically generated
5859 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
5860 * Removed the special crate language for `.rc` files
5861 * Function arguments may consist of any irrefutable pattern
5864 * `&` and `~` pointers may point to objects
5865 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
5866 * Enum variants may be structs
5867 * Destructors can be added to all nominal types with the Drop trait
5868 * Structs and nullary enum variants may be constants
5869 * Values that cannot be implicitly copied are now automatically moved
5870 without writing `move` explicitly
5871 * `&T` may now be coerced to `*T`
5872 * Coercions happen in `let` statements as well as function calls
5873 * `use` statements now take crate-relative paths
5874 * The module and type namespaces have been merged so that static
5875 method names can be resolved under the trait in which they are
5878 * Improved support for language features
5879 * Trait inheritance works in many scenarios
5880 * More support for explicit self arguments in methods - `self`, `&self`
5881 `@self`, and `~self` all generally work as expected
5882 * Static methods work in more situations
5883 * Experimental: Traits may declare default methods for the implementations
5887 * New condition handling system in `core::condition`
5888 * Timsort added to `std::sort`
5889 * New priority queue, `std::priority_queue`
5890 * Pipes for serializable types, `std::flatpipes'
5891 * Serialization overhauled to be trait-based
5892 * Expanded `getopts` definitions
5893 * Moved futures to `std`
5894 * More functions are pure now
5895 * `core::comm` renamed to `oldcomm`. Still deprecated
5896 * `rustdoc` and `cargo` are libraries now
5899 * Added a preliminary REPL, `rusti`
5900 * License changed from MIT to dual MIT/APL2
5903 Version 0.4 (2012-10-15)
5904 ==========================
5906 * ~2000 changes, numerous bugfixes
5909 * All keywords are now strict and may not be used as identifiers anywhere
5910 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
5911 'of', 'with', 'to', 'class'.
5912 * Classes are replaced with simpler structs
5913 * Explicit method self types
5914 * `ret` became `return` and `alt` became `match`
5915 * `import` is now `use`; `use is now `extern mod`
5916 * `extern mod { ... }` is now `extern { ... }`
5917 * `use mod` is the recommended way to import modules
5918 * `pub` and `priv` replace deprecated export lists
5919 * The syntax of `match` pattern arms now uses fat arrow (=>)
5920 * `main` no longer accepts an args vector; use `os::args` instead
5923 * Trait implementations are now coherent, ala Haskell typeclasses
5924 * Trait methods may be static
5925 * Argument modes are deprecated
5926 * Borrowed pointers are much more mature and recommended for use
5927 * Strings and vectors in the static region are stored in constant memory
5928 * Typestate was removed
5929 * Resolution rewritten to be more reliable
5930 * Support for 'dual-mode' data structures (freezing and thawing)
5933 * Most binary operators can now be overloaded via the traits in
5935 * `std::net::url` for representing URLs
5936 * Sendable hash maps in `core::send_map`
5937 * `core::task' gained a (currently unsafe) task-local storage API
5940 * An efficient new intertask communication primitive called the pipe,
5941 along with a number of higher-level channel types, in `core::pipes`
5942 * `std::arc`, an atomically reference counted, immutable, shared memory
5944 * `std::sync`, various exotic synchronization tools based on arcs and pipes
5945 * Futures are now based on pipes and sendable
5946 * More robust linked task failure
5947 * Improved task builder API
5950 * Improved error reporting
5951 * Preliminary JIT support
5952 * Preliminary work on precise GC
5953 * Extensive architectural improvements to rustc
5954 * Begun a transition away from buggy C++-based reflection (shape) code to
5955 Rust-based (visitor) code
5956 * All hash functions and tables converted to secure, randomized SipHash
5959 Version 0.3 (2012-07-12)
5960 ========================
5962 * ~1900 changes, numerous bugfixes
5964 * New coding conveniences
5965 * Integer-literal suffix inference
5966 * Per-item control over warnings, errors
5967 * #[cfg(windows)] and #[cfg(unix)] attributes
5968 * Documentation comments
5969 * More compact closure syntax
5970 * 'do' expressions for treating higher-order functions as
5972 * *-patterns (wildcard extended to all constructor fields)
5975 * Name resolution pass and exhaustiveness checker rewritten
5976 * Region pointers and borrow checking supersede alias
5978 * Init-ness checking is now provided by a region-based liveness
5979 pass instead of the typestate pass; same for last-use analysis
5980 * Extensive work on region pointers
5982 * Experimental new language features
5983 * Slices and fixed-size, interior-allocated vectors
5984 * #!-comments for lang versioning, shell execution
5985 * Destructors and iface implementation for classes;
5986 type-parameterized classes and class methods
5987 * 'const' type kind for types that can be used to implement
5988 shared-memory concurrency patterns
5992 * Removal of various obsolete features
5993 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
5994 'crust', 'native' (now 'extern'), 'cont' (now 'again')
5996 * Constructs: do-while loops ('do' repurposed), fn binding,
5997 resources (replaced by destructors)
5999 * Compiler reorganization
6000 * Syntax-layer of compiler split into separate crate
6001 * Clang (from LLVM project) integrated into build
6002 * Typechecker split into sub-modules
6005 * New time functions
6006 * Extension methods for many built-in types
6007 * Arc: atomic-refcount read-only / exclusive-use shared cells
6008 * Par: parallel map and search routines
6009 * Extensive work on libuv interface
6010 * Much vector code moved to libraries
6011 * Syntax extensions: #line, #col, #file, #mod, #stringify,
6012 #include, #include_str, #include_bin
6015 * Cargo automatically resolves dependencies
6018 Version 0.2 (2012-03-29)
6019 =========================
6021 * >1500 changes, numerous bugfixes
6023 * New docs and doc tooling
6025 * New port: FreeBSD x86_64
6027 * Compilation model enhancements
6028 * Generics now specialized, multiply instantiated
6029 * Functions now inlined across separate crates
6031 * Scheduling, stack and threading fixes
6032 * Noticeably improved message-passing performance
6033 * Explicit schedulers
6037 * Experimental new language features
6038 * Operator overloading
6042 * Various language extensions
6043 * C-callback function types: 'crust fn ...'
6044 * Infinite-loop construct: 'loop { ... }'
6045 * Shorten 'mutable' to 'mut'
6046 * Required mutable-local qualifier: 'let mut ...'
6047 * Basic glob-exporting: 'export foo::*;'
6048 * Alt now exhaustive, 'alt check' for runtime-checked
6049 * Block-function form of 'for' loop, with 'break' and 'ret'.
6052 * AST quasi-quote syntax extension
6053 * Revived libuv interface
6054 * New modules: core::{future, iter}, std::arena
6055 * Merged per-platform std::{os*, fs*} to core::{libc, os}
6056 * Extensive cleanup, regularization in libstd, libcore
6059 Version 0.1 (2012-01-20)
6060 ===============================
6062 * Most language features work, including:
6063 * Unique pointers, unique closures, move semantics
6064 * Interface-constrained generics
6065 * Static interface dispatch
6067 * Multithread task scheduling
6068 * Typestate predicates
6069 * Failure unwinding, destructors
6070 * Pattern matching and destructuring assignment
6071 * Lightweight block-lambda syntax
6072 * Preliminary macro-by-example
6074 * Compiler works with the following configurations:
6075 * Linux: x86 and x86_64 hosts and targets
6076 * macOS: x86 and x86_64 hosts and targets
6077 * Windows: x86 hosts and targets
6079 * Cross compilation / multi-target configuration supported.
6081 * Preliminary API-documentation and package-management tools included.
6085 * Documentation is incomplete.
6087 * Performance is below intended target.
6089 * Standard library APIs are subject to extensive change, reorganization.
6091 * Language-level versioning is not yet operational - future code will