|
| 1 | +Version 1.87.0 (2025-05-15) |
| 2 | +========================== |
| 3 | + |
| 4 | +<a id="1.87.0-Language"></a> |
| 5 | + |
| 6 | +Language |
| 7 | +-------- |
| 8 | +- [Stabilize `asm_goto` feature](https://github.com/rust-lang/rust/pull/133870) |
| 9 | +- [Allow parsing open beginning ranges (`..EXPR`) after unary operators `!`, `-`, and `*`](https://github.com/rust-lang/rust/pull/134900). |
| 10 | +- [Don't require method impls for methods with `Self: Sized` bounds in `impl`s for unsized types](https://github.com/rust-lang/rust/pull/135480) |
| 11 | +- [Stabilize `feature(precise_capturing_in_traits)` allowing `use<...>` bounds on return position `impl Trait` in `trait`s](https://github.com/rust-lang/rust/pull/138128) |
| 12 | + |
| 13 | +<a id="1.87.0-Compiler"></a> |
| 14 | + |
| 15 | +Compiler |
| 16 | +-------- |
| 17 | +- [x86: make SSE2 required for i686 targets and use it to pass SIMD types](https://github.com/rust-lang/rust/pull/135408) |
| 18 | + |
| 19 | +<a id="1.87.0-Platform-Support"></a> |
| 20 | + |
| 21 | +Platform Support |
| 22 | +---------------- |
| 23 | +- [Remove `i586-pc-windows-msvc` target](https://github.com/rust-lang/rust/pull/137957) |
| 24 | + |
| 25 | +Refer to Rust's [platform support page][platform-support-doc] |
| 26 | +for more information on Rust's tiered platform support. |
| 27 | + |
| 28 | +[platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html |
| 29 | + |
| 30 | +<a id="1.87.0-Libraries"></a> |
| 31 | + |
| 32 | +Libraries |
| 33 | +--------- |
| 34 | +- [Stabilize the anonymous pipe API](https://github.com/rust-lang/rust/issues/127154) |
| 35 | +- [Add support for unbounded left/right shift operations](https://github.com/rust-lang/rust/issues/129375) |
| 36 | +- [Print pointer metadata in `Debug` impl of raw pointers](https://github.com/rust-lang/rust/pull/135080) |
| 37 | +- [`Vec::with_capacity` guarantees it allocates with the amount requested, even if `Vec::capacity` returns a different number.](https://github.com/rust-lang/rust/pull/135933) |
| 38 | +- Most `std::arch` intrinsics which don't take pointer arguments can now be called from safe code if the caller has the appropriate target features already enabled (https://github.com/rust-lang/stdarch/pull/1714, https://github.com/rust-lang/stdarch/pull/1716, https://github.com/rust-lang/stdarch/pull/1717) |
| 39 | +- [Undeprecate `env::home_dir`](https://github.com/rust-lang/rust/pull/137327) |
| 40 | +- [Denote `ControlFlow` as `#[must_use]`](https://github.com/rust-lang/rust/pull/137449) |
| 41 | +- [Macros such as `assert_eq!` and `vec!` now support `const {...}` expressions](https://github.com/rust-lang/rust/pull/138162) |
| 42 | + |
| 43 | +<a id="1.87.0-Stabilized-APIs"></a> |
| 44 | + |
| 45 | +Stabilized APIs |
| 46 | +--------------- |
| 47 | + |
| 48 | +- [`Vec::extract_if`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.extract_if) |
| 49 | +- [`vec::ExtractIf`](https://doc.rust-lang.org/stable/std/vec/struct.ExtractIf.html) |
| 50 | +- [`LinkedList::extract_if`](https://doc.rust-lang.org/stable/std/collections/struct.LinkedList.html#method.extract_if) |
| 51 | +- [`linked_list::ExtractIf`](https://doc.rust-lang.org/stable/std/collections/linked_list/struct.ExtractIf.html) |
| 52 | +- [`<[T]>::split_off`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off) |
| 53 | +- [`<[T]>::split_off_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_mut) |
| 54 | +- [`<[T]>::split_off_first`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_first) |
| 55 | +- [`<[T]>::split_off_first_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_first_mut) |
| 56 | +- [`<[T]>::split_off_last`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_last) |
| 57 | +- [`<[T]>::split_off_last_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_last_mut) |
| 58 | +- [`String::extend_from_within`](https://doc.rust-lang.org/stable/alloc/string/struct.String.html#method.extend_from_within) |
| 59 | +- [`os_str::Display`](https://doc.rust-lang.org/stable/std/ffi/os_str/struct.Display.html) |
| 60 | +- [`OsString::display`](https://doc.rust-lang.org/stable/std/ffi/struct.OsString.html#method.display) |
| 61 | +- [`OsStr::display`](https://doc.rust-lang.org/stable/std/ffi/struct.OsStr.html#method.display) |
| 62 | +- [`io::pipe`](https://doc.rust-lang.org/stable/std/io/fn.pipe.html) |
| 63 | +- [`io::PipeReader`](https://doc.rust-lang.org/stable/std/io/struct.PipeReader.html) |
| 64 | +- [`io::PipeWriter`](https://doc.rust-lang.org/stable/std/io/struct.PipeWriter.html) |
| 65 | +- [`impl From<PipeReader> for OwnedHandle`](https://doc.rust-lang.org/stable/std/os/windows/io/struct.OwnedHandle.html#impl-From%3CPipeReader%3E-for-OwnedHandle) |
| 66 | +- [`impl From<PipeWriter> for OwnedHandle`](https://doc.rust-lang.org/stable/std/os/windows/io/struct.OwnedHandle.html#impl-From%3CPipeWriter%3E-for-OwnedHandle) |
| 67 | +- [`impl From<PipeReader> for Stdio`](https://doc.rust-lang.org/stable/std/process/struct.Stdio.html) |
| 68 | +- [`impl From<PipeWriter> for Stdio`](https://doc.rust-lang.org/stable/std/process/struct.Stdio.html#impl-From%3CPipeWriter%3E-for-Stdio) |
| 69 | +- [`impl From<PipeReader> for OwnedFd`](https://doc.rust-lang.org/stable/std/os/fd/struct.OwnedFd.html#impl-From%3CPipeReader%3E-for-OwnedFd) |
| 70 | +- [`impl From<PipeWriter> for OwnedFd`](https://doc.rust-lang.org/stable/std/os/fd/struct.OwnedFd.html#impl-From%3CPipeWriter%3E-for-OwnedFd) |
| 71 | +- [`Box<MaybeUninit<T>>::write`](https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.write) |
| 72 | +- [`impl TryFrom<Vec<u8>> for String`](https://doc.rust-lang.org/stable/std/string/struct.String.html#impl-TryFrom%3CVec%3Cu8%3E%3E-for-String) |
| 73 | +- [`<*const T>::offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.offset_from_unsigned) |
| 74 | +- [`<*const T>::byte_offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.byte_offset_from_unsigned) |
| 75 | +- [`<*mut T>::offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.offset_from_unsigned-1) |
| 76 | +- [`<*mut T>::byte_offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.byte_offset_from_unsigned-1) |
| 77 | +- [`NonNull::offset_from_unsigned`](https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.offset_from_unsigned) |
| 78 | +- [`NonNull::byte_offset_from_unsigned`](https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.byte_offset_from_unsigned) |
| 79 | +- [`<uN>::cast_signed`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.cast_signed) |
| 80 | +- [`NonZero::<uN>::cast_signed`](https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.cast_signed-5). |
| 81 | +- [`<iN>::cast_unsigned`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.cast_unsigned). |
| 82 | +- [`NonZero::<iN>::cast_unsigned`](https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.cast_unsigned-5). |
| 83 | +- [`<uN>::is_multiple_of`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.is_multiple_of) |
| 84 | +- [`<uN>::unbounded_shl`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.unbounded_shl) |
| 85 | +- [`<uN>::unbounded_shr`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.unbounded_shr) |
| 86 | +- [`<iN>::unbounded_shl`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.unbounded_shl) |
| 87 | +- [`<iN>::unbounded_shr`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.unbounded_shr) |
| 88 | +- [`<iN>::midpoint`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.midpoint) |
| 89 | +- [`<str>::from_utf8`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8) |
| 90 | +- [`<str>::from_utf8_mut`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8_mut) |
| 91 | +- [`<str>::from_utf8_unchecked`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8_unchecked) |
| 92 | +- [`<str>::from_utf8_unchecked_mut`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8_unchecked_mut) |
| 93 | + |
| 94 | +These previously stable APIs are now stable in const contexts: |
| 95 | + |
| 96 | +- [`core::str::from_utf8_mut`](https://doc.rust-lang.org/stable/std/str/fn.from_utf8_mut.html) |
| 97 | +- [`<[T]>::copy_from_slice`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.copy_from_slice) |
| 98 | +- [`SocketAddr::set_ip`](https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html#method.set_ip) |
| 99 | +- [`SocketAddr::set_port`](https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html#method.set_port), |
| 100 | +- [`SocketAddrV4::set_ip`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV4.html#method.set_ip) |
| 101 | +- [`SocketAddrV4::set_port`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV4.html#method.set_port), |
| 102 | +- [`SocketAddrV6::set_ip`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_ip) |
| 103 | +- [`SocketAddrV6::set_port`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_port) |
| 104 | +- [`SocketAddrV6::set_flowinfo`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_flowinfo) |
| 105 | +- [`SocketAddrV6::set_scope_id`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_scope_id) |
| 106 | +- [`char::is_digit`](https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_digit) |
| 107 | +- [`char::is_whitespace`](https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_whitespace) |
| 108 | +- [`<[[T; N]]>::as_flattened`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_flattened) |
| 109 | +- [`<[[T; N]]>::as_flattened_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_flattened_mut) |
| 110 | +- [`String::into_bytes`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.into_bytes) |
| 111 | +- [`String::as_str`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_str) |
| 112 | +- [`String::capacity`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.capacity) |
| 113 | +- [`String::as_bytes`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_bytes) |
| 114 | +- [`String::len`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.len) |
| 115 | +- [`String::is_empty`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.is_empty) |
| 116 | +- [`String::as_mut_str`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_mut_str) |
| 117 | +- [`String::as_mut_vec`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_mut_vec) |
| 118 | +- [`Vec::as_ptr`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_ptr) |
| 119 | +- [`Vec::as_slice`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_slice) |
| 120 | +- [`Vec::capacity`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.capacity) |
| 121 | +- [`Vec::len`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.len) |
| 122 | +- [`Vec::is_empty`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.is_empty) |
| 123 | +- [`Vec::as_mut_slice`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_mut_slice) |
| 124 | +- [`Vec::as_mut_ptr`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_mut_ptr) |
| 125 | + |
| 126 | +<a id="1.87.0-Cargo"></a> |
| 127 | + |
| 128 | +Cargo |
| 129 | +----- |
| 130 | +- [Add terminal integration via ANSI OSC 9;4 sequences](https://github.com/rust-lang/cargo/pull/14615/) |
| 131 | +- [chore: bump openssl to v3](https://github.com/rust-lang/cargo/pull/15232/) |
| 132 | +- [feat(package): add --exclude-lockfile flag](https://github.com/rust-lang/cargo/pull/15234/) |
| 133 | + |
| 134 | +<a id="1.87.0-Compatibility-Notes"></a> |
| 135 | + |
| 136 | +Compatibility Notes |
| 137 | +------------------- |
| 138 | +- [Rust now raises an error for macro invocations inside the `#![crate_name]` attribute](https://github.com/rust-lang/rust/pull/127581) |
| 139 | +- [Unstable fields are now always considered to be inhabited](https://github.com/rust-lang/rust/pull/133889) |
| 140 | +- [Macro arguments of unary operators followed by open beginning ranges may now be matched differently](https://github.com/rust-lang/rust/pull/134900) |
| 141 | +- [Make `Debug` impl of raw pointers print metadata if present](https://github.com/rust-lang/rust/pull/135080) |
| 142 | +- [Warn against function pointers using unsupported ABI strings in dependencies](https://github.com/rust-lang/rust/pull/135767) |
| 143 | +- [Associated types on `dyn` types are no longer deduplicated](https://github.com/rust-lang/rust/pull/136458) |
| 144 | +- [Forbid attributes on `..` inside of struct patterns (`let Struct { #[attribute] .. }) =`](https://github.com/rust-lang/rust/pull/136490) |
| 145 | +- [Make `ptr_cast_add_auto_to_object` lint into hard error](https://github.com/rust-lang/rust/pull/136764) |
| 146 | +- Many `std::arch` intrinsics are now safe to call in some contexts, there may now be new `unused_unsafe` warnings in existing codebases. |
| 147 | +- [Limit `width` and `precision` formatting options to 16 bits on all targets](https://github.com/rust-lang/rust/pull/136932) |
| 148 | +- [Turn order dependent trait objects future incompat warning into a hard error](https://github.com/rust-lang/rust/pull/136968) |
| 149 | +- [Denote `ControlFlow` as `#[must_use]`](https://github.com/rust-lang/rust/pull/137449) |
| 150 | +- [Windows: The standard library no longer links `advapi32`, except on win7.](https://github.com/rust-lang/rust/pull/138233) Code such as C libraries that were relying on this assumption may need to explicitly link advapi32. |
| 151 | +- [Proc macros can no longer observe expanded `cfg(true)` attributes.](https://github.com/rust-lang/rust/pull/138844) |
| 152 | +- [Start changing the internal representation of pasted tokens](https://github.com/rust-lang/rust/pull/124141). Certain invalid declarative macros that were previously accepted in obscure circumstances are now correctly rejected by the compiler. Use of a `tt` fragment specifier can often fix these macros. |
| 153 | +- [Don't allow flattened format_args in const.](https://github.com/rust-lang/rust/pull/139624) |
| 154 | + |
| 155 | +<a id="1.87.0-Internal-Changes"></a> |
| 156 | + |
| 157 | +Internal Changes |
| 158 | +---------------- |
| 159 | + |
| 160 | +These changes do not affect any public interfaces of Rust, but they represent |
| 161 | +significant improvements to the performance or internals of rustc and related |
| 162 | +tools. |
| 163 | + |
| 164 | +- [Update to LLVM 20](https://github.com/rust-lang/rust/pull/135763) |
| 165 | + |
| 166 | + |
1 | 167 | Version 1.86.0 (2025-04-03) |
2 | 168 | ========================== |
3 | 169 |
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