Allow comparisons between `CStr`, `CString`, and `Cow<CStr>`. by bjoernager · Pull Request #137268 · rust-lang/rust

bjoernager · 2025-02-19T09:41:32Z

This PR adds the trait implementations proposed in the ACP under the c_string_eq_c_str feature gate:

// core::ffiimplPartialEq<&Self>forCStr;implPartialEq<CString>forCStr;implPartialEq<Cow<'_,Self>>forCStr;// alloc::ffiimplPartialEq<CStr>forCString;implPartialEq<&CStr>forCString;implPartialEq<Cow<'_,CStr>>forCString;// alloc::borrowimplPartialEq<CStr>forCow<'_,CStr>;implPartialEq<&CStr>forCow<'_,CStr>;implPartialEq<CString>forCow<'_,CStr>;

As I understand it, stable traits cannot be unstably implemented for stable types, and we would thereby be forced to skip the FCP and directly stabilise these implementations (as is done in this PR).

(@joshtriplett mentioned that Crater may have to be run).

rustbot · 2025-02-19T09:41:42Z

r? @Amanieu

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bjoernager · 2025-02-19T09:42:09Z

@rustbot label +T-libs-api -T-libs

r? libs-api

…ent 'PartialEq<{CStr, &CStr, Cow<CStr>}>' for 'CString'; Implement 'PartialEq<{CStr, &CStr, CString}>' for 'Cow<CStr>';

bjoernager · 2025-03-22T09:51:19Z

Friendly ping @BurntSushi :)

jieyouxu · 2025-04-28T09:26:00Z

r? libs-api

Amanieu · 2025-04-30T12:45:58Z

@bors try

Allow comparisons between `CStr`, `CString`, and `Cow<CStr>`. Closes: rust-lang#137265 This PR adds the trait implementations proposed in the [ACP](rust-lang/libs-team#517) under the `c_string_eq_c_str` feature gate: ```rust // core::ffi impl PartialEq<&Self> for CStr; impl PartialEq<CString> for CStr; impl PartialEq<Cow<'_, Self>> for CStr; // alloc::ffi impl PartialEq<CStr> for CString; impl PartialEq<&CStr> for CString; impl PartialEq<Cow<'_, CStr>> for CString; // alloc::borrow impl PartialEq<CStr> for Cow<'_, CStr>; impl PartialEq<&CStr> for Cow<'_, CStr>; impl PartialEq<CString> for Cow<'_, CStr>; ``` As I understand it, stable traits cannot be unstably implemented for stable types, and we would thereby be forced to skip the FCP and directly stabilise these implementations (as is done in this PR). (`@joshtriplett` mentioned that Crater may have to be run).

bors · 2025-04-30T12:47:15Z

⌛ Trying commit 817b093 with merge 1f308f1...

bors · 2025-04-30T14:54:33Z

☀️ Try build successful - checks-actions
Build commit: 1f308f1 (1f308f12738d8cc40bb23bf0c8114b37c164bb49)

Amanieu · 2025-04-30T22:56:37Z

@craterbot check

craterbot · 2025-04-30T22:56:53Z

👌 Experiment pr-137268 created and queued.
🤖 Automatically detected try build 1f308f1
🔍 You can check out the queue and this experiment's details.

ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

rfcbot · 2025-05-25T22:45:50Z

🔔 This is now entering its final comment period, as per the review above. 🔔

rfcbot · 2025-06-04T22:46:29Z

The final comment period, with a disposition to merge, as per the review above, is now complete.

As the automated representative of the governance process, I would like to thank the author for their work and everyone else who contributed.

This will be merged soon.

Amanieu · 2025-06-24T09:36:55Z

@bors r+

bors · 2025-06-24T09:36:57Z

📌 Commit 817b093 has been approved by Amanieu

It is now in the queue for this repository.

Rollup of 7 pull requests Successful merges: - #137268 (Allow comparisons between `CStr`, `CString`, and `Cow<CStr>`.) - #142704 (Remove the deprecated unstable `concat_idents!` macro) - #142742 ([win][aarch64] Fix linking statics on Arm64EC, take 2) - #142843 (Enable reproducible-build-2 for Windows MSVC) - #142916 (rustdoc-json: Add test for `#[optimize(..)]`) - #142919 (rustdoc-json: Add test for `#[cold]`) - #142944 (Stats output tweaks) Failed merges: - #142825 (Port `#[track_caller]` to the new attribute system) r? `@ghost` `@rustbot` modify labels: rollup

Rollup merge of #137268 - bjoernager:c-string-eq-c-str, r=Amanieu Allow comparisons between `CStr`, `CString`, and `Cow<CStr>`. Closes: #137265 This PR adds the trait implementations proposed in the [ACP](rust-lang/libs-team#517) under the `c_string_eq_c_str` feature gate: ```rust // core::ffi impl PartialEq<&Self> for CStr; impl PartialEq<CString> for CStr; impl PartialEq<Cow<'_, Self>> for CStr; // alloc::ffi impl PartialEq<CStr> for CString; impl PartialEq<&CStr> for CString; impl PartialEq<Cow<'_, CStr>> for CString; // alloc::borrow impl PartialEq<CStr> for Cow<'_, CStr>; impl PartialEq<&CStr> for Cow<'_, CStr>; impl PartialEq<CString> for Cow<'_, CStr>; ``` As I understand it, stable traits cannot be unstably implemented for stable types, and we would thereby be forced to skip the FCP and directly stabilise these implementations (as is done in this PR). (`@joshtriplett` mentioned that Crater may have to be run).

…tr, r=Amanieu" This reverts commit 30550c0, reversing changes made to 36b2163.

Revert "Rollup merge of #137268 - bjoernager:c-string-eq-c-str, r=Amanieu" This reverts commit 30550c0, reversing changes made to 36b2163. This is an experiment for purposes of retrying the relevant crater run. r? `@ghost`

…anieu Allow comparisons between `CStr`, `CString`, and `Cow<CStr>`. Closes: rust-lang#137265 This PR adds the trait implementations proposed in the [ACP](rust-lang/libs-team#517) under the `c_string_eq_c_str` feature gate: ```rust // core::ffi impl PartialEq<&Self> for CStr; impl PartialEq<CString> for CStr; impl PartialEq<Cow<'_, Self>> for CStr; // alloc::ffi impl PartialEq<CStr> for CString; impl PartialEq<&CStr> for CString; impl PartialEq<Cow<'_, CStr>> for CString; // alloc::borrow impl PartialEq<CStr> for Cow<'_, CStr>; impl PartialEq<&CStr> for Cow<'_, CStr>; impl PartialEq<CString> for Cow<'_, CStr>; ``` As I understand it, stable traits cannot be unstably implemented for stable types, and we would thereby be forced to skip the FCP and directly stabilise these implementations (as is done in this PR). (`@joshtriplett` mentioned that Crater may have to be run).

Pkgsrc changes: * Adjust patches to adapt to upstream changes and new versions. * assosicated checksums Upstream changes relative to 1.89.0: Version 1.90 (2025-09-18) ========================== Language -------- - [Split up the `unknown_or_malformed_diagnostic_attributes` lint] (rust-lang/rust#140717). This lint has been split up into four finer-grained lints, with `unknown_or_malformed_diagnostic_attributes` now being the lint group that contains these lints: 1. `unknown_diagnostic_attributes`: unknown to the current compiler 2. `misplaced_diagnostic_attributes`: placed on the wrong item 3. `malformed_diagnostic_attributes`: malformed attribute syntax or options 4. `malformed_diagnostic_format_literals`: malformed format string literal - [Allow constants whose final value has references to mutable/external memory, but reject such constants as patterns] (rust-lang/rust#140942) - [Allow volatile access to non-Rust memory, including address 0] (rust-lang/rust#141260) Compiler -------- - [Use `lld` by default on `x86_64-unknown-linux-gnu`] (rust-lang/rust#140525). - [Tier 3 `musl` targets now link dynamically by default] (rust-lang/rust#144410). Affected targets: - `mips64-unknown-linux-muslabi64` - `powerpc64-unknown-linux-musl` - `powerpc-unknown-linux-musl` - `powerpc-unknown-linux-muslspe` - `riscv32gc-unknown-linux-musl` - `s390x-unknown-linux-musl` - `thumbv7neon-unknown-linux-musleabihf` Platform Support ---------------- - [Demote `x86_64-apple-darwin` to Tier 2 with host tools] (rust-lang/rust#145252) Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. [platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html Libraries --------- - [Stabilize `u*::{checked,overflowing,saturating,wrapping}_sub_signed`] (rust-lang/rust#126043) - [Allow comparisons between `CStr`, `CString`, and `Cow<CStr>`] (rust-lang/rust#137268) - [Remove some unsized tuple impls since unsized tuples can't be constructed] (rust-lang/rust#138340) - [Set `MSG_NOSIGNAL` for `UnixStream`] (rust-lang/rust#140005) - [`proc_macro::Ident::new` now supports `$crate`.] (rust-lang/rust#141996) - [Guarantee the pointer returned from `Thread::into_raw` has at least 8 bytes of alignment] (rust-lang/rust#143859) Stabilized APIs --------------- - [`u{n}::checked_sub_signed`] (https://doc.rust-lang.org/stable/std/primitive.usize.html#method.checked_sub_signed) - [`u{n}::overflowing_sub_signed`] (https://doc.rust-lang.org/stable/std/primitive.usize.html#method.overflowing_sub_signed) - [`u{n}::saturating_sub_signed`] (https://doc.rust-lang.org/stable/std/primitive.usize.html#method.saturating_sub_signed) - [`u{n}::wrapping_sub_signed`] (https://doc.rust-lang.org/stable/std/primitive.usize.html#method.wrapping_sub_signed) - [`impl Copy for IntErrorKind`] (https://doc.rust-lang.org/stable/std/num/enum.IntErrorKind.html#impl-Copy-for-IntErrorKind) - [`impl Hash for IntErrorKind`] (https://doc.rust-lang.org/stable/std/num/enum.IntErrorKind.html#impl-Hash-for-IntErrorKind) - [`impl PartialEq<&CStr> for CStr`] (https://doc.rust-lang.org/stable/std/ffi/struct.CStr.html#impl-PartialEq%3C%26CStr%3E-for-CStr) - [`impl PartialEq<CString> for CStr`] (https://doc.rust-lang.org/stable/std/ffi/struct.CStr.html#impl-PartialEq%3CCString%3E-for-CStr) - [`impl PartialEq<Cow<CStr>> for CStr`] (https://doc.rust-lang.org/stable/std/ffi/struct.CStr.html#impl-PartialEq%3CCow%3C'_,+CStr%3E%3E-for-CStr) - [`impl PartialEq<&CStr> for CString`] (https://doc.rust-lang.org/stable/std/ffi/struct.CString.html#impl-PartialEq%3C%26CStr%3E-for-CString) - [`impl PartialEq<CStr> for CString`] (https://doc.rust-lang.org/stable/std/ffi/struct.CString.html#impl-PartialEq%3CCStr%3E-for-CString) - [`impl PartialEq<Cow<CStr>> for CString`] (https://doc.rust-lang.org/stable/std/ffi/struct.CString.html#impl-PartialEq%3CCow%3C'_,+CStr%3E%3E-for-CString) - [`impl PartialEq<&CStr> for Cow<CStr>`] (https://doc.rust-lang.org/stable/std/borrow/enum.Cow.html#impl-PartialEq%3C%26CStr%3E-for-Cow%3C'_,+CStr%3E) - [`impl PartialEq<CStr> for Cow<CStr>`] (https://doc.rust-lang.org/stable/std/borrow/enum.Cow.html#impl-PartialEq%3CCStr%3E-for-Cow%3C'_,+CStr%3E) - [`impl PartialEq<CString> for Cow<CStr>`] (https://doc.rust-lang.org/stable/std/borrow/enum.Cow.html#impl-PartialEq%3CCString%3E-for-Cow%3C'_,+CStr%3E) These previously stable APIs are now stable in const contexts: - [`<[T]>::reverse`] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.reverse) - [`f32::floor`] (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.floor) - [`f32::ceil`] (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.ceil) - [`f32::trunc`] (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.trunc) - [`f32::fract`] (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.fract) - [`f32::round`] (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.round) - [`f32::round_ties_even`] (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.round_ties_even) - [`f64::floor`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.floor) - [`f64::ceil`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.ceil) - [`f64::trunc`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.trunc) - [`f64::fract`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.fract) - [`f64::round`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.round) - [`f64::round_ties_even`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.round_ties_even) Cargo ----- - [Add `http.proxy-cainfo` config for proxy certs] (rust-lang/cargo#15374) - [Use `gix` for `cargo package`] (rust-lang/cargo#15534) - [feat(publish): Stabilize multi-package publishing] (rust-lang/cargo#15636) Rustdoc ----- - [Add ways to collapse all impl blocks] (rust-lang/rust#141663). Previously the "Summary" button and "-" keyboard shortcut would never collapse `impl` blocks, now they do when shift is held - [Display unsafe attributes with `unsafe()` wrappers] (rust-lang/rust#143662) Compatibility Notes ------------------- - [Use `lld` by default on `x86_64-unknown-linux-gnu`] (rust-lang/rust#140525). See also <https://blog.rust-lang.org/2025/09/01/rust-lld-on-1.90.0-stable/>. - [Make `core::iter::Fuse`'s `Default` impl construct `I::default()` internally as promised in the docs instead of always being empty] (rust-lang/rust#140985) - [Set `MSG_NOSIGNAL` for `UnixStream`] (rust-lang/rust#140005) This may change program behavior but results in the same behavior as other primitives (e.g., stdout, network sockets). Programs relying on signals to terminate them should update handling of sockets to handle errors on write by exiting. - [On Unix `std::env::home_dir` will use the fallback if the `HOME` environment variable is empty] (rust-lang/rust#141840) - We now [reject unsupported `extern "{abi}"`s consistently in all positions] (rust-lang/rust#142134). This primarily affects the use of implementing traits on an `extern "{abi}"` function pointer, like `extern "stdcall" fn()`, on a platform that doesn't support that, like aarch64-unknown-linux-gnu. Direct usage of these unsupported ABI strings by declaring or defining functions was already rejected, so this is only a change for consistency. - [const-eval: error when initializing a static writes to that static] (rust-lang/rust#143084) - [Check that the `proc_macro_derive` macro has correct arguments when applied to the crate root] (rust-lang/rust#143607)

This MR contains the following updates: | Package | Update | Change | |---|---|---| | [rust](https://github.com/rust-lang/rust) | minor | `1.89.0` -> `1.90.0` | MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot). **Proposed changes to behavior should be submitted there as MRs.** --- ### Release Notes <details> <summary>rust-lang/rust (rust)</summary> ### [`v1.90.0`](https://github.com/rust-lang/rust/blob/HEAD/RELEASES.md#Version-1900-2025-09-18) [Compare Source](rust-lang/rust@1.89.0...1.90.0) \=========================== <a id="1.90-Language"></a> ## Language - [Split up the `unknown_or_malformed_diagnostic_attributes` lint](rust-lang/rust#140717). This lint has been split up into four finer-grained lints, with `unknown_or_malformed_diagnostic_attributes` now being the lint group that contains these lints: 1. `unknown_diagnostic_attributes`: unknown to the current compiler 2. `misplaced_diagnostic_attributes`: placed on the wrong item 3. `malformed_diagnostic_attributes`: malformed attribute syntax or options 4. `malformed_diagnostic_format_literals`: malformed format string literal - [Allow constants whose final value has references to mutable/external memory, but reject such constants as patterns](rust-lang/rust#140942) - [Allow volatile access to non-Rust memory, including address 0](rust-lang/rust#141260) <a id="1.90-Compiler"></a> ## Compiler - [Use `lld` by default on `x86_64-unknown-linux-gnu`](rust-lang/rust#140525). - [Tier 3 `musl` targets now link dynamically by default](rust-lang/rust#144410). Affected targets: - `mips64-unknown-linux-muslabi64` - `powerpc64-unknown-linux-musl` - `powerpc-unknown-linux-musl` - `powerpc-unknown-linux-muslspe` - `riscv32gc-unknown-linux-musl` - `s390x-unknown-linux-musl` - `thumbv7neon-unknown-linux-musleabihf` <a id="1.90-Platform-Support"></a> ## Platform Support - [Demote `x86_64-apple-darwin` to Tier 2 with host tools](rust-lang/rust#145252) Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. [platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html <a id="1.90-Libraries"></a> ## Libraries - [Stabilize `u*::{checked,overflowing,saturating,wrapping}_sub_signed`](rust-lang/rust#126043) - [Allow comparisons between `CStr`, `CString`, and `Cow<CStr>`](rust-lang/rust#137268) - [Remove some unsized tuple impls since unsized tuples can't be constructed](rust-lang/rust#138340) - [Set `MSG_NOSIGNAL` for `UnixStream`](rust-lang/rust#140005) - [`proc_macro::Ident::new` now supports `$crate`.](rust-lang/rust#141996) - [Guarantee the pointer returned from `Thread::into_raw` has at least 8 bytes of alignment](rust-lang/rust#143859) <a id="1.90-Stabilized-APIs"></a> ## Stabilized APIs - [`u{n}::checked_sub_signed`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.checked_sub_signed) - [`u{n}::overflowing_sub_signed`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.overflowing_sub_signed) - [`u{n}::saturating_sub_signed`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.saturating_sub_signed) - [`u{n}::wrapping_sub_signed`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.wrapping_sub_signed) - [`impl Copy for IntErrorKind`](https://doc.rust-lang.org/stable/std/num/enum.IntErrorKind.html#impl-Copy-for-IntErrorKind) - [`impl Hash for IntErrorKind`](https://doc.rust-lang.org/stable/std/num/enum.IntErrorKind.html#impl-Hash-for-IntErrorKind) - [`impl PartialEq<&CStr> for CStr`](https://doc.rust-lang.org/stable/std/ffi/struct.CStr.html#impl-PartialEq%3C%26CStr%3E-for-CStr) - [`impl PartialEq<CString> for CStr`](https://doc.rust-lang.org/stable/std/ffi/struct.CStr.html#impl-PartialEq%3CCString%3E-for-CStr) - [`impl PartialEq<Cow<CStr>> for CStr`](https://doc.rust-lang.org/stable/std/ffi/struct.CStr.html#impl-PartialEq%3CCow%3C'_,+CStr%3E%3E-for-CStr) - [`impl PartialEq<&CStr> for CString`](https://doc.rust-lang.org/stable/std/ffi/struct.CString.html#impl-PartialEq%3C%26CStr%3E-for-CString) - [`impl PartialEq<CStr> for CString`](https://doc.rust-lang.org/stable/std/ffi/struct.CString.html#impl-PartialEq%3CCStr%3E-for-CString) - [`impl PartialEq<Cow<CStr>> for CString`](https://doc.rust-lang.org/stable/std/ffi/struct.CString.html#impl-PartialEq%3CCow%3C'_,+CStr%3E%3E-for-CString) - [`impl PartialEq<&CStr> for Cow<CStr>`](https://doc.rust-lang.org/stable/std/borrow/enum.Cow.html#impl-PartialEq%3C%26CStr%3E-for-Cow%3C'_,+CStr%3E) - [`impl PartialEq<CStr> for Cow<CStr>`](https://doc.rust-lang.org/stable/std/borrow/enum.Cow.html#impl-PartialEq%3CCStr%3E-for-Cow%3C'_,+CStr%3E) - [`impl PartialEq<CString> for Cow<CStr>`](https://doc.rust-lang.org/stable/std/borrow/enum.Cow.html#impl-PartialEq%3CCString%3E-for-Cow%3C'_,+CStr%3E) These previously stable APIs are now stable in const contexts: - [`<[T]>::reverse`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.reverse) - [`f32::floor`](https://doc.rust-lang.org/stable/std/primitive.f32.html#method.floor) - [`f32::ceil`](https://doc.rust-lang.org/stable/std/primitive.f32.html#method.ceil) - [`f32::trunc`](https://doc.rust-lang.org/stable/std/primitive.f32.html#method.trunc) - [`f32::fract`](https://doc.rust-lang.org/stable/std/primitive.f32.html#method.fract) - [`f32::round`](https://doc.rust-lang.org/stable/std/primitive.f32.html#method.round) - [`f32::round_ties_even`](https://doc.rust-lang.org/stable/std/primitive.f32.html#method.round_ties_even) - [`f64::floor`](https://doc.rust-lang.org/stable/std/primitive.f64.html#method.floor) - [`f64::ceil`](https://doc.rust-lang.org/stable/std/primitive.f64.html#method.ceil) - [`f64::trunc`](https://doc.rust-lang.org/stable/std/primitive.f64.html#method.trunc) - [`f64::fract`](https://doc.rust-lang.org/stable/std/primitive.f64.html#method.fract) - [`f64::round`](https://doc.rust-lang.org/stable/std/primitive.f64.html#method.round) - [`f64::round_ties_even`](https://doc.rust-lang.org/stable/std/primitive.f64.html#method.round_ties_even) <a id="1.90-Cargo"></a> ## Cargo - [Add `http.proxy-cainfo` config for proxy certs](rust-lang/cargo#15374) - [Use `gix` for `cargo package`](rust-lang/cargo#15534) - [feat(publish): Stabilize multi-package publishing](rust-lang/cargo#15636) <a id="1.90-Rustdoc"></a> ## Rustdoc - [Add ways to collapse all impl blocks](rust-lang/rust#141663). Previously the "Summary" button and "-" keyboard shortcut would never collapse `impl` blocks, now they do when shift is held - [Display unsafe attributes with `unsafe()` wrappers](rust-lang/rust#143662) <a id="1.90-Compatibility-Notes"></a> ## Compatibility Notes - [Use `lld` by default on `x86_64-unknown-linux-gnu`](rust-lang/rust#140525). See also <https://blog.rust-lang.org/2025/09/01/rust-lld-on-1.90.0-stable/>. - [Make `core::iter::Fuse`'s `Default` impl construct `I::default()` internally as promised in the docs instead of always being empty](rust-lang/rust#140985) - [Set `MSG_NOSIGNAL` for `UnixStream`](rust-lang/rust#140005) This may change program behavior but results in the same behavior as other primitives (e.g., stdout, network sockets). Programs relying on signals to terminate them should update handling of sockets to handle errors on write by exiting. - [On Unix `std::env::home_dir` will use the fallback if the `HOME` environment variable is empty](rust-lang/rust#141840) - We now [reject unsupported `extern "{abi}"`s consistently in all positions](rust-lang/rust#142134). This primarily affects the use of implementing traits on an `extern "{abi}"` function pointer, like `extern "stdcall" fn()`, on a platform that doesn't support that, like aarch64-unknown-linux-gnu. Direct usage of these unsupported ABI strings by declaring or defining functions was already rejected, so this is only a change for consistency. - [const-eval: error when initializing a static writes to that static](rust-lang/rust#143084) - [Check that the `proc_macro_derive` macro has correct arguments when applied to the crate root](rust-lang/rust#143607) </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this MR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this MR, check this box --- This MR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).

Pkgsrc changes: * Disable the build of NetBSD-*aarch64eb, since it now fails both to cross-build and to build natively. Ref. rust-lang/rust#146842 * Adjusted patches, checksum updates etc. Upstream changes: Version 1.90 (2025-09-18) ========================== Language -------- - [Split up the `unknown_or_malformed_diagnostic_attributes` lint] (rust-lang/rust#140717). This lint has been split up into four finer-grained lints, with `unknown_or_malformed_diagnostic_attributes` now being the lint group that contains these lints: 1. `unknown_diagnostic_attributes`: unknown to the current compiler 2. `misplaced_diagnostic_attributes`: placed on the wrong item 3. `malformed_diagnostic_attributes`: malformed attribute syntax or options 4. `malformed_diagnostic_format_literals`: malformed format string literal - [Allow constants whose final value has references to mutable/external memory, but reject such constants as patterns] (rust-lang/rust#140942) - [Allow volatile access to non-Rust memory, including address 0] (rust-lang/rust#141260) Compiler -------- - [Use `lld` by default on `x86_64-unknown-linux-gnu`] (rust-lang/rust#140525). - [Tier 3 `musl` targets now link dynamically by default] (rust-lang/rust#144410). Affected targets: - `mips64-unknown-linux-muslabi64` - `powerpc64-unknown-linux-musl` - `powerpc-unknown-linux-musl` - `powerpc-unknown-linux-muslspe` - `riscv32gc-unknown-linux-musl` - `s390x-unknown-linux-musl` - `thumbv7neon-unknown-linux-musleabihf` Platform Support ---------------- - [Demote `x86_64-apple-darwin` to Tier 2 with host tools] (rust-lang/rust#145252) Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. [platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html Libraries --------- - [Stabilize `u*::{checked,overflowing,saturating,wrapping}_sub_signed`] (rust-lang/rust#126043) - [Allow comparisons between `CStr`, `CString`, and `Cow<CStr>`] (rust-lang/rust#137268) - [Remove some unsized tuple impls since unsized tuples can't be constructed] (rust-lang/rust#138340) - [Set `MSG_NOSIGNAL` for `UnixStream`] (rust-lang/rust#140005) - [`proc_macro::Ident::new` now supports `$crate`.] (rust-lang/rust#141996) - [Guarantee the pointer returned from `Thread::into_raw` has at least 8 bytes of alignment] (rust-lang/rust#143859) Stabilized APIs --------------- - [`u{n}::checked_sub_signed`] (https://doc.rust-lang.org/stable/std/primitive.usize.html#method.checked_sub_signed) - [`u{n}::overflowing_sub_signed`] (https://doc.rust-lang.org/stable/std/primitive.usize.html#method.overflowing_sub_signed) - [`u{n}::saturating_sub_signed`] (https://doc.rust-lang.org/stable/std/primitive.usize.html#method.saturating_sub_signed) - [`u{n}::wrapping_sub_signed`] (https://doc.rust-lang.org/stable/std/primitive.usize.html#method.wrapping_sub_signed) - [`impl Copy for IntErrorKind`] (https://doc.rust-lang.org/stable/std/num/enum.IntErrorKind.html#impl-Copy-for-IntErrorKind) - [`impl Hash for IntErrorKind`] (https://doc.rust-lang.org/stable/std/num/enum.IntErrorKind.html#impl-Hash-for-IntErrorKind) - [`impl PartialEq<&CStr> for CStr`] (https://doc.rust-lang.org/stable/std/ffi/struct.CStr.html#impl-PartialEq%3C%26CStr%3E-for-CStr) - [`impl PartialEq<CString> for CStr`] (https://doc.rust-lang.org/stable/std/ffi/struct.CStr.html#impl-PartialEq%3CCString%3E-for-CStr) - [`impl PartialEq<Cow<CStr>> for CStr`] (https://doc.rust-lang.org/stable/std/ffi/struct.CStr.html#impl-PartialEq%3CCow%3C'_,+CStr%3E%3E-for-CStr) - [`impl PartialEq<&CStr> for CString`] (https://doc.rust-lang.org/stable/std/ffi/struct.CString.html#impl-PartialEq%3C%26CStr%3E-for-CString) - [`impl PartialEq<CStr> for CString`] (https://doc.rust-lang.org/stable/std/ffi/struct.CString.html#impl-PartialEq%3CCStr%3E-for-CString) - [`impl PartialEq<Cow<CStr>> for CString`] (https://doc.rust-lang.org/stable/std/ffi/struct.CString.html#impl-PartialEq%3CCow%3C'_,+CStr%3E%3E-for-CString) - [`impl PartialEq<&CStr> for Cow<CStr>`] (https://doc.rust-lang.org/stable/std/borrow/enum.Cow.html#impl-PartialEq%3C%26CStr%3E-for-Cow%3C'_,+CStr%3E) - [`impl PartialEq<CStr> for Cow<CStr>`] (https://doc.rust-lang.org/stable/std/borrow/enum.Cow.html#impl-PartialEq%3CCStr%3E-for-Cow%3C'_,+CStr%3E) - [`impl PartialEq<CString> for Cow<CStr>`] (https://doc.rust-lang.org/stable/std/borrow/enum.Cow.html#impl-PartialEq%3CCString%3E-for-Cow%3C'_,+CStr%3E) These previously stable APIs are now stable in const contexts: - [`<[T]>::reverse`] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.reverse) - [`f32::floor`] (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.floor) - [`f32::ceil`] (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.ceil) - [`f32::trunc`] (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.trunc) - [`f32::fract`] (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.fract) (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.fract) - [`f32::round`] (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.round) - [`f32::round_ties_even`] (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.round_ties_even) - [`f64::floor`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.floor) - [`f64::ceil`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.ceil) - [`f64::trunc`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.trunc) - [`f64::fract`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.fract) - [`f64::round`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.round) - [`f64::round_ties_even`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.round_ties_even) Cargo ----- - [Add `http.proxy-cainfo` config for proxy certs] (rust-lang/cargo#15374) - [Use `gix` for `cargo package`] (rust-lang/cargo#15534) - [feat(publish): Stabilize multi-package publishing] (rust-lang/cargo#15636) Rustdoc ----- - [Add ways to collapse all impl blocks] (rust-lang/rust#141663). Previously the "Summary" button and "-" keyboard shortcut would never collapse `impl` blocks, now they do when shift is held - [Display unsafe attributes with `unsafe()` wrappers] (rust-lang/rust#143662) Compatibility Notes ------------------- - [Use `lld` by default on `x86_64-unknown-linux-gnu`] (rust-lang/rust#140525). See also <https://blog.rust-lang.org/2025/09/01/rust-lld-on-1.90.0-stable/>. - [Make `core::iter::Fuse`'s `Default` impl construct `I::default()` internally as promised in the docs instead of always being empty] (rust-lang/rust#140985) - [Set `MSG_NOSIGNAL` for `UnixStream`] (rust-lang/rust#140005) This may change program behavior but results in the same behavior as other primitives (e.g., stdout, network sockets). Programs relying on signals to terminate them should update handling of sockets to handle errors on write by exiting. - [On Unix `std::env::home_dir` will use the fallback if the `HOME` environment variable is empty] (rust-lang/rust#141840) - We now [reject unsupported `extern "{abi}"`s consistently in all positions] (rust-lang/rust#142134). This primarily affects the use of implementing traits on an `extern "{abi}"` function pointer, like `extern "stdcall" fn()`, on a platform that doesn't support that, like aarch64-unknown-linux-gnu. Direct usage of these unsupported ABI strings by declaring or defining functions was already rejected, so this is only a change for consistency. - [const-eval: error when initializing a static writes to that static] (rust-lang/rust#143084) - [Check that the `proc_macro_derive` macro has correct arguments when applied to the crate root] (rust-lang/rust#143607) Version 1.89.0 (2025-08-07) ========================== Language -------- - [Stabilize explicitly inferred const arguments (`feature(generic_arg_infer)`)] (rust-lang/rust#141610) - [Add a warn-by-default `mismatched_lifetime_syntaxes` lint.] (rust-lang/rust#138677) This lint detects when the same lifetime is referred to by different syntax categories between function arguments and return values, which can be confusing to read, especially in unsafe code. This lint supersedes the warn-by-default `elided_named_lifetimes` lint. - [Expand `unpredictable_function_pointer_comparisons` to also lint on function pointer comparisons in external macros] (rust-lang/rust#134536) - [Make the `dangerous_implicit_autorefs` lint deny-by-default] (rust-lang/rust#141661) - [Stabilize the avx512 target features] (rust-lang/rust#138940) - [Stabilize `kl` and `widekl` target features for x86] (rust-lang/rust#140766) - [Stabilize `sha512`, `sm3` and `sm4` target features for x86] (rust-lang/rust#140767) - [Stabilize LoongArch target features `f`, `d`, `frecipe`, `lasx`, `lbt`, `lsx`, and `lvz`] (rust-lang/rust#135015) - [Remove `i128` and `u128` from `improper_ctypes_definitions`] (rust-lang/rust#137306) - [Stabilize `repr128` (`#[repr(u128)]`, `#[repr(i128)]`)] (rust-lang/rust#138285) - [Allow `#![doc(test(attr(..)))]` everywhere] (rust-lang/rust#140560) - [Extend temporary lifetime extension to also go through tuple struct and tuple variant constructors] (rust-lang/rust#140593) Compiler -------- - [Default to non-leaf frame pointers on aarch64-linux] (rust-lang/rust#140832) - [Enable non-leaf frame pointers for Arm64EC Windows] (rust-lang/rust#140862) - [Set Apple frame pointers by architecture] (rust-lang/rust#141797) Platform Support ---------------- - [Add new Tier-3 targets `loongarch32-unknown-none` and `loongarch32-unknown-none-softfloat`] (rust-lang/rust#142053) Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. [platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html Libraries --------- - [Specify the base path for `file!`] (rust-lang/rust#134442) - [Allow storing `format_args!()` in a variable] (rust-lang/rust#140748) - [Add `#[must_use]` to `[T; N]::map`] (rust-lang/rust#140957) - [Implement `DerefMut` for `Lazy{Cell,Lock}`] (rust-lang/rust#129334) - [Implement `Default` for `array::IntoIter`] (rust-lang/rust#141574) - [Implement `Clone` for `slice::ChunkBy`] (rust-lang/rust#138016) - [Implement `io::Seek` for `io::Take`] (rust-lang/rust#138023) Stabilized APIs --------------- - [`NonZero<char>`] (https://doc.rust-lang.org/stable/std/num/struct.NonZero.html) - Many intrinsics for x86, not enumerated here - [AVX512 intrinsics](rust-lang/rust#111137) - [`SHA512`, `SM3` and `SM4` intrinsics] (rust-lang/rust#126624) - [`File::lock`] (https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.lock) - [`File::lock_shared`] (https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.lock_shared) - [`File::try_lock`] (https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.try_lock) - [`File::try_lock_shared`] (https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.try_lock_shared) - [`File::unlock`] (https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.unlock) - [`NonNull::from_ref`] (https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.from_ref) - [`NonNull::from_mut`] (https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.from_mut) - [`NonNull::without_provenance`] (https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.without_provenance) - [`NonNull::with_exposed_provenance`] (https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.with_exposed_provenance) - [`NonNull::expose_provenance`] (https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.expose_provenance) - [`OsString::leak`] (https://doc.rust-lang.org/stable/std/ffi/struct.OsString.html#method.leak) - [`PathBuf::leak`] (https://doc.rust-lang.org/stable/std/path/struct.PathBuf.html#method.leak) - [`Result::flatten`] (https://doc.rust-lang.org/stable/std/result/enum.Result.html#method.flatten) - [`std::os::linux::net::TcpStreamExt::quickack`] (https://doc.rust-lang.org/stable/std/os/linux/net/trait.TcpStreamExt.html#tymethod.quickack) - [`std::os::linux::net::TcpStreamExt::set_quickack`] (https://doc.rust-lang.org/stable/std/os/linux/net/trait.TcpStreamExt.html#tymethod.set_quickack) These previously stable APIs are now stable in const contexts: - [`<[T; N]>::as_mut_slice`] (https://doc.rust-lang.org/stable/std/primitive.array.html#method.as_mut_slice) - [`<[u8]>::eq_ignore_ascii_case`] (https://doc.rust-lang.org/stable/std/primitive.slice.html#impl-%5Bu8%5D/method.eq_ignore_ascii_case) - [`str::eq_ignore_ascii_case`] (https://doc.rust-lang.org/stable/std/primitive.str.html#impl-str/method.eq_ignore_ascii_case) Cargo ----- - [`cargo fix` and `cargo clippy --fix` now default to the same Cargo target selection as other build commands.] (rust-lang/cargo#15192) Previously it would apply to all targets (like binaries, examples, tests, etc.). The `--edition` flag still applies to all targets. - [Stabilize doctest-xcompile.] (rust-lang/cargo#15462) Doctests are now tested when cross-compiling. Just like other tests, it will use the [`runner` setting] (https://doc.rust-lang.org/cargo/reference/config.html#targettriplerunner) to run the tests. If you need to disable tests for a target, you can use the [ignore doctest attribute] (https://doc.rust-lang.org/rustdoc/write-documentation/documentation-tests.html#ignoring-targets) to specify the targets to ignore. Rustdoc ----- - [On mobile, make the sidebar full width and linewrap] (rust-lang/rust#139831). This makes long section and item names much easier to deal with on mobile. Compatibility Notes ------------------- - [Make `missing_fragment_specifier` an unconditional error] (rust-lang/rust#128425) - [Enabling the `neon` target feature on `aarch64-unknown-none-softfloat` causes a warning] (rust-lang/rust#135160) because mixing code with and without that target feature is not properly supported by LLVM - [Sized Hierarchy: Part I](rust-lang/rust#137944) - Introduces a small breaking change affecting `?Sized` bounds on impls on recursive types which contain associated type projections. It is not expected to affect any existing published crates. Can be fixed by refactoring the involved types or opting into the `sized_hierarchy` unstable feature. See the [FCP report] (rust-lang/rust#137944 (comment)) for a code example. - The warn-by-default `elided_named_lifetimes` lint is [superseded by the warn-by-default `mismatched_lifetime_syntaxes` lint.] (rust-lang/rust#138677) - [Error on recursive opaque types earlier in the type checker] (rust-lang/rust#139419) - [Type inference side effects from requiring element types of array repeat expressions are `Copy` are now only available at the end of type checking] (rust-lang/rust#139635) - [The deprecated accidentally-stable `std::intrinsics::{copy,copy_nonoverlapping,write_bytes}` are now proper intrinsics] (rust-lang/rust#139916). There are no debug assertions guarding against UB, and they cannot be coerced to function pointers. - [Remove long-deprecated `std::intrinsics::drop_in_place`] (rust-lang/rust#140151) - [Make well-formedness predicates no longer coinductive] (rust-lang/rust#140208) - [Remove hack when checking impl method compatibility] (rust-lang/rust#140557) - [Remove unnecessary type inference due to built-in trait object impls] (rust-lang/rust#141352) - [Lint against "stdcall", "fastcall", and "cdecl" on non-x86-32 targets] (rust-lang/rust#141435) - [Future incompatibility warnings relating to the never type (`!`) are now reported in dependencies] (rust-lang/rust#141937) - [Ensure `std::ptr::copy_*` intrinsics also perform the static self-init checks] (rust-lang/rust#142575) Internal Changes ---------------- These changes do not affect any public interfaces of Rust, but they represent significant improvements to the performance or internals of rustc and related tools. - [Correctly un-remap compiler sources paths with the `rustc-dev` component] (rust-lang/rust#142377)

rustbot assigned Amanieu Feb 19, 2025

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bjoernager mentioned this pull request Feb 19, 2025
Tracking Issue for allowing comparisons between CStr, CString, and Cow<CStr>. #137265
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rustbot added T-libs-api [DEPRECATED; DO NOT USE] and removed T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Feb 19, 2025

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bjoernager force-pushed the c-string-eq-c-str branch from f82bfac to 3472f5fCompare February 19, 2025 21:07

rustbot removed has-merge-commits PR has merge commits, merge with caution. S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Feb 19, 2025

bjoernager changed the title ~~Implement PartialEq<{&Self, CString}> for CStr and PartialEq<{CStr, &CStr}> for CString.~~Allow comparisons between CStr, CString, and Cow<CStr>.Feb 19, 2025

Implement 'PartialEq<{&Self, CString, Cow<Self>}>' for 'CStr'; Implem…
817b093
…ent 'PartialEq<{CStr, &CStr, Cow<CStr>}>' for 'CString'; Implement 'PartialEq<{CStr, &CStr, CString}>' for 'Cow<CStr>';

bjoernager force-pushed the c-string-eq-c-str branch from 3472f5f to 817b093Compare February 20, 2025 16:51

rustbot assigned Amanieu and unassigned BurntSushi Apr 28, 2025

rfcbot removed the proposed-final-comment-period Proposed to merge/close by relevant subteam, see T-<team> label. Will enter FCP once signed off. label May 25, 2025

rfcbot added finished-final-comment-period The final comment period is finished for this PR / Issue. to-announce Announce this issue on triage meeting and removed final-comment-period In the final comment period and will be merged soon unless new substantive objections are raised. labels Jun 4, 2025

rustbot mentioned this pull request Jun 4, 2025
Tracking issue for release notes of #137268: Allow comparisons between CStr, CString, and Cow<CStr>. #142049
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bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jun 24, 2025

GuillaumeGomez mentioned this pull request Jun 24, 2025
Rollup of 7 pull requests #142962
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bors merged commit 30550c0 into rust-lang:masterJun 24, 2025

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workingjubilee mentioned this pull request Jun 28, 2025
New "type annotations needed" error in Rust nightly-2025-06-24 #143164
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workingjubilee added a commit to workingjubilee/rustc that referenced this pull request Jun 28, 2025
Revert "Rollup merge ofrust-lang#137268- bjoernager:c-string-eq-c-s…
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…tr, r=Amanieu" This reverts commit 30550c0, reversing changes made to 36b2163.

BoxyUwU mentioned this pull request Aug 21, 2025
Draft release notes for 1.90 #145730
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theemathas mentioned this pull request Sep 19, 2025
1.90.0 regression: type inference fails when comparing CString array with empty array literal #146782
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