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Tyler Mandry 2022-05-13 16:58:28 -07:00
parent 80e2957c60
commit 4d523a8149

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@ -13,17 +13,14 @@ Compiler
--------
- [Linking modifier syntax in `#[link]` attributes and on the command line, as well as the `whole-archive` modifier specifically, are now supported][93901]
- [Update to LLVM 14.0.0][95247]
- [The `char` type is now described as UTF-32 in debuginfo][89887]
- The [`#[target_feature]`][target_feature] attribute [can now be used with aarch64 features][90621]
- X86 [`#[target_feature = "adx"]` is now stable][93745]
- [Catching a second unwind from FFI code while cleaning up from a Rust panic now causes the process to abort][92911]
Libraries
---------
- [`ManuallyDrop<T>` is now documented to have the same layout as `T`][88375]
- [Windows paths longer than 260 chars are now supported in `process::Command` without needing explicit canonicalization][92519]
- [`#[ignore = "…"]` messages are printed when running tests][92714]
- [Consistently present absent stdio handles on Windows as NULL handles][93263]
- [Make `std::io::stdio::lock()` return `'static` handles.][93965] Previously, the creation of locked handles to stdin/stdout/stderr would borrow the handles being locked, which prevented writing `let out = std::io::stdout().lock();` because `out` would outlive the return value of `stdout()`. Such code now works, eliminating a common pitfall that affected many Rust users.
@ -33,28 +30,26 @@ Libraries
Stabilized APIs
---------------
- [`From<&[T; N]>` for `Vec<T>`][95098]
- [`From<&mut [T; N]>` for `Vec<T>`][95098]
- [`Pin::static_mut`][93580]
- [`Pin::static_ref`][93580]
- [`Vec::retain_mut`][95491]
- [`VecDeque::retain_mut`][95491]
- [`Write` for `Cursor<[u8; N]>`][92663]
- [`std::os::unix::net::SocketAddr::from_pathname`][94356]
- [`std::process::ExitCode`][93840] and [`std::process::Termination`][93840]. The stabilization of these two APIs now makes it possible for programs to return errors from `main` with custom exit codes.
- [`std::thread::JoinHandle::is_finished`][95130]
- [`Pin::static_mut`]
- [`Pin::static_ref`]
- [`Vec::retain_mut`]
- [`VecDeque::retain_mut`]
- [`Write` for `Cursor<[u8; N]>`][cursor-write-array]
- [`std::os::unix::net::SocketAddr::from_pathname`]
- [`std::process::ExitCode`] and [`std::process::Termination`]. The stabilization of these two APIs now makes it possible for programs to return errors from `main` with custom exit codes.
- [`std::thread::JoinHandle::is_finished`]
These APIs are now usable in const contexts:
- [`*const T::offset` and `*mut T::offset`][93957]
- [`*const T::wrapping_offset` and `*mut T::wrapping_offset`][93957]
- [`*const T::add` and `*mut T::add`][93957]
- [`*const T::sub` and `*mut T::sub`][93957]
- [`*const T::wrapping_add` and `*mut T::wrapping_add`][93957]
- [`*const T::wrapping_sub` and `*mut T::wrapping_sub`][93957]
- [`[T]::as_mut_ptr`][93957]
- [`[T]::as_ptr_range`][93957]
- [`[T]::as_mut_ptr_range`][93957]
- [`<*const T>::offset` and `<*mut T>::offset`][ptr-offset]
- [`<*const T>::wrapping_offset` and `<*mut T>::wrapping_offset`][ptr-wrapping_offset]
- [`<*const T>::add` and `<*mut T>::add`][ptr-add]
- [`<*const T>::sub` and `<*mut T>::sub`][ptr-sub]
- [`<*const T>::wrapping_add` and `<*mut T>::wrapping_add`][ptr-wrapping_add]
- [`<*const T>::wrapping_sub` and `<*mut T>::wrapping_sub`][ptr-wrapping_sub]
- [`<[T]>::as_mut_ptr`][slice-as_mut_ptr]
- [`<[T]>::as_ptr_range`][slice-as_ptr_range]
- [`<[T]>::as_mut_ptr_range`][slice-as_mut_ptr_range]
Cargo
-----
@ -64,7 +59,10 @@ No feature changes, but see compatibility notes.
Compatibility Notes
-------------------
- [Disable `#[thread_local]` support on i686-pc-windows-msvc][95430]
- Previously native static libraries were linked as `whole-archive` in some cases, but now rustc tries not to use `whole-archive` unless explicitly requested. This [change][93901] may result in linking errors in some cases. To fix such errors, native libraries linked from the command line, build scripts, or [`#[link]` attributes][link-attr] need to
- (more common) either be reordered to respect dependencies between them (if `a` depends on `b` then `a` should go first and `b` second)
- (less common) or be updated to use the [`+whole-archive`] modifier.
- [Catching a second unwind from FFI code while cleaning up from a Rust panic now causes the process to abort][92911]
- [Proc macros no longer see `ident` matchers wrapped in groups][92472]
- [The number of `#` in `r#` raw string literals is now required to be less than 256][95251]
- [When checking that a dyn type satisfies a trait bound, supertrait bounds are now enforced][92285]
@ -87,33 +85,42 @@ and related tools.
[90621]: https://github.com/rust-lang/rust/pull/90621/
[92285]: https://github.com/rust-lang/rust/pull/92285/
[92472]: https://github.com/rust-lang/rust/pull/92472/
[92519]: https://github.com/rust-lang/rust/pull/92519/
[92663]: https://github.com/rust-lang/rust/pull/92663/
[92697]: https://github.com/rust-lang/rust/pull/92697/
[92714]: https://github.com/rust-lang/rust/pull/92714/
[92911]: https://github.com/rust-lang/rust/pull/92911/
[93263]: https://github.com/rust-lang/rust/pull/93263/
[93580]: https://github.com/rust-lang/rust/pull/93580/
[93745]: https://github.com/rust-lang/rust/pull/93745/
[93827]: https://github.com/rust-lang/rust/pull/93827/
[93840]: https://github.com/rust-lang/rust/pull/93840/
[93901]: https://github.com/rust-lang/rust/pull/93901/
[93913]: https://github.com/rust-lang/rust/pull/93913/
[93957]: https://github.com/rust-lang/rust/pull/93957/
[93965]: https://github.com/rust-lang/rust/pull/93965/
[94081]: https://github.com/rust-lang/rust/pull/94081/
[94261]: https://github.com/rust-lang/rust/pull/94261/
[94295]: https://github.com/rust-lang/rust/pull/94295/
[94356]: https://github.com/rust-lang/rust/pull/94356/
[94832]: https://github.com/rust-lang/rust/pull/94832/
[95016]: https://github.com/rust-lang/rust/pull/95016/
[95098]: https://github.com/rust-lang/rust/pull/95098/
[95130]: https://github.com/rust-lang/rust/pull/95130/
[95247]: https://github.com/rust-lang/rust/pull/95247/
[95251]: https://github.com/rust-lang/rust/pull/95251/
[95430]: https://github.com/rust-lang/rust/pull/95430/
[95491]: https://github.com/rust-lang/rust/pull/95491/
[`+whole-archive`]: https://doc.rust-lang.org/stable/rustc/command-line-arguments.html#linking-modifiers-whole-archive
[`Pin::static_mut`]: https://doc.rust-lang.org/stable/std/pin/struct.Pin.html#method.static_mut
[`Pin::static_ref`]: https://doc.rust-lang.org/stable/std/pin/struct.Pin.html#method.static_ref
[`Vec::retain_mut`]: https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.retain_mut
[`VecDeque::retain_mut`]: https://doc.rust-lang.org/stable/std/collections/struct.VecDeque.html#method.retain_mut
[`std::os::unix::net::SocketAddr::from_pathname`]: https://doc.rust-lang.org/stable/std/os/unix/net/struct.SocketAddr.html#method.from_pathname
[`std::process::ExitCode`]: https://doc.rust-lang.org/stable/std/process/struct.ExitCode.html
[`std::process::Termination`]: https://doc.rust-lang.org/stable/std/process/trait.Termination.html
[`std::thread::JoinHandle::is_finished`]: https://doc.rust-lang.org/stable/std/thread/struct.JoinHandle.html#method.is_finished
[cargo/10448]: https://github.com/rust-lang/cargo/pull/10448/
[cursor-write-array]: https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#impl-Write-4
[link-attr]: https://doc.rust-lang.org/stable/reference/items/external-blocks.html#the-link-attribute
[ptr-add]: https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.add
[ptr-offset]: https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.offset
[ptr-sub]: https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.sub
[ptr-wrapping_add]: https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.wrapping_add
[ptr-wrapping_offset]: https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.wrapping_offset
[ptr-wrapping_sub]: https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.wrapping_sub
[slice-as_mut_ptr]: https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_mut_ptr
[slice-as_mut_ptr_range]: https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_mut_ptr_range
[slice-as_ptr_range]: https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_ptr_range
[target_feature]: https://doc.rust-lang.org/reference/attributes/codegen.html#the-target_feature-attribute