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Draft release notes for 1.87
#140133 opened Apr 21, 2025 by BoxyUwU
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10,264 Open 47,447 Closed
10,264 Open 47,447 Closed
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Issues list

Tracking issue for release notes of #134273: de-stabilize bench attribute relnotes Marks issues that should be documented in the release notes of the next release. relnotes-tracking-issue Marks issues tracking what text to put in release notes. T-lang Relevant to the language team, which will review and decide on the PR/issue.
#140629 opened May 3, 2025 by rustbot
OpenOptions::open InvalidInput error for read(true).create(true) is unclear (or check is redundant) A-docs Area: Documentation for any part of the project, including the compiler, standard library, and tools A-filesystem Area: `std::fs` T-libs Relevant to the library team, which will review and decide on the PR/issue.
#140621 opened May 3, 2025 by 0xdeafbeef
4
tests/ui/debuginfo/debuginfo-type-name-layout-ice-94961-2.rs emits "values of the type [u8; usize::MAX] are too big for the target architecture" differently A-debuginfo Area: Debugging information in compiled programs (DWARF, PDB, etc.) A-testsuite Area: The testsuite used to check the correctness of rustc C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140620 opened May 3, 2025 by jieyouxu
Raw strings w/ too many terminating hashes are not exclusively handled A-diagnostics Area: Messages for errors, warnings, and lints T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140618 opened May 3, 2025 by md-tr
Better message when trying to assign two variables at once / match on a tuple without using parentheses A-diagnostics Area: Messages for errors, warnings, and lints T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140615 opened May 3, 2025 by xuiqzy
1
regression: ICE: expr in place where literal is expected (builtin attr parsing) A-attributes Area: Attributes (`#[…]`, `#![…]`) A-macros Area: All kinds of macros (custom derive, macro_rules!, proc macros, ..) C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ P-critical Critical priority regression-from-stable-to-beta Performance or correctness regression from stable to beta. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140612 opened May 3, 2025 by jieyouxu 1.87.0
@fmease
6
Oddity with lifetime elision and type aliases A-lifetimes Area: Lifetimes / regions C-discussion Category: Discussion or questions that doesn't represent real issues. I-lang-nominated Nominated for discussion during a lang team meeting. T-lang Relevant to the language team, which will review and decide on the PR/issue.
#140611 opened May 3, 2025 by traviscross
1
transmutability: high memory unsage for types containing references C-bug Category: This is a bug. F-transmutability `#![feature(transmutability)]` I-compilemem Issue: Problems and improvements with respect to memory usage during compilation. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140610 opened May 3, 2025 by tmiasko
ICE Unevaluated ty::Const in MIR body C-bug Category: This is a bug. F-generic_const_exprs `#![feature(generic_const_exprs)]` F-with_negative_coherence `#![feature(with_negative_coherence)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140609 opened May 3, 2025 by matthiaskrgr
Type annotations needed for closure with associated type A-closures Area: Closures (`|…| { … }`) A-inference Area: Type inference C-enhancement Category: An issue proposing an enhancement or a PR with one. T-types Relevant to the types team, which will review and decide on the PR/issue.
#140603 opened May 3, 2025 by camsteffen
1
Mismatch between sync and async drop gen? A-async-await Area: Async & Await A-const-eval Area: Constant evaluation, covers all const contexts (static, const fn, ...) A-monomorphization Area: Monomorphization C-bug Category: This is a bug. needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140600 opened May 2, 2025 by lovely-error
3
Tracking issue for release notes of #138340: Remove some unsized tuple impls now that we don't support unsizing tuples anymore needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. relnotes Marks issues that should be documented in the release notes of the next release. relnotes-tracking-issue Marks issues tracking what text to put in release notes. T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.
#140589 opened May 2, 2025 by rustbot
Filter proc-macro helper attributes at AST lowering A-attributes Area: Attributes (`#[…]`, `#![…]`) C-cleanup Category: PRs that clean code up or issues documenting cleanup. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140587 opened May 2, 2025 by jdonszelmann
closures in dead code are no longer borrowchecked A-borrow-checker Area: The borrow checker C-bug Category: This is a bug. P-critical Critical priority regression-from-stable-to-nightly Performance or correctness regression from stable to nightly. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140583 opened May 2, 2025 by ginnyTheCat
1
@lcnr
2
Unuseful span in type error in some format_args!() invocations A-diagnostics Area: Messages for errors, warnings, and lints A-fmt Area: `core::fmt` D-imprecise-spans Diagnostics: spans don't point to exactly the erroneous code E-help-wanted Call for participation: Help is requested to fix this issue. P-low Low priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140578 opened May 2, 2025 by m-ou-se
ICE: next solver: failed to resolve instance for <e<FilterFn<{closure@code.rs:31:15: 31:17}> C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. S-has-mcve Status: A Minimal Complete and Verifiable Example has been found for this issue T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. WG-trait-system-refactor The Rustc Trait System Refactor Initiative (-Znext-solver)
#140577 opened May 2, 2025 by matthiaskrgr
4
compiletest: consider transitioning //@ only-* target-based directives to e.g. //@ only-target_arch: arch1 arch2 A-compiletest Area: The compiletest test runner C-enhancement Category: An issue proposing an enhancement or a PR with one. S-blocked Status: Blocked on something else such as an RFC or other implementation work. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140575 opened May 2, 2025 by jieyouxu
@jieyouxu
ICE: normalization_nested_goals.is_empty() C-bug Category: This is a bug. F-associated_const_equality `#![feature(associated_const_equality)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140571 opened May 2, 2025 by matthiaskrgr
1
Need comprehensive story for target_feature compat A-target-feature Area: Enabling/disabling target features like AVX, Neon, etc. C-bug Category: This is a bug. E-needs-design This issue needs exploration and design to see how and if we can fix/implement it T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140570 opened May 2, 2025 by workingjubilee
1
member constraints are order-dependent A-impl-trait Area: `impl Trait`. Universally / existentially quantified anonymous types with static dispatch. A-NLL Area: Non-lexical lifetimes (NLL) C-bug Category: This is a bug. T-types Relevant to the types team, which will review and decide on the PR/issue.
#140569 opened May 2, 2025 by lcnr
@lcnr
Lang proposal: extern "unspecified" for naked functions with arbitrary ABI A-inline-assembly Area: Inline assembly (`asm!(…)`) C-feature-request Category: A feature request, i.e: not implemented / a PR. I-lang-nominated Nominated for discussion during a lang team meeting. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-lang Relevant to the language team, which will review and decide on the PR/issue.
#140566 opened May 1, 2025 by tgross35
@traviscross
18
Tracking issue for release notes of #140066: Stabilize <[T; N]>::as_mut_slice as const relnotes Marks issues that should be documented in the release notes of the next release. relnotes-tracking-issue Marks issues tracking what text to put in release notes. T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.
#140554 opened May 1, 2025 by rustbot
2
rustc diagnostic for incorrect return-pos bounds of Fn traits as function arguments suggests deleting until file start A-diagnostics Area: Messages for errors, warnings, and lints T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140543 opened May 1, 2025 by rbakbashev
1
Can Redox OS implement a TOCTOU-free fs::remove_dir_all yet? A-docs Area: Documentation for any part of the project, including the compiler, standard library, and tools C-discussion Category: Discussion or questions that doesn't represent real issues. O-redox Operating system: Redox, https://www.redox-os.org/ T-libs Relevant to the library team, which will review and decide on the PR/issue.
#140533 opened Apr 30, 2025 by workingjubilee
@jackpot51
7
ICE: Failed to normalize *mut std::pin::Pin<std::boxed::Box<Alias(Projection, AliasTy { args: [impl AsyncFnOnce().. C-bug Category: This is a bug. F-async_drop `#![feature(async_drop)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-incomplete-features This issue requires the use of incomplete features. S-has-bisection Status: a bisection has been found for this issue S-has-mcve Status: A Minimal Complete and Verifiable Example has been found for this issue T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140531 opened Apr 30, 2025 by matthiaskrgr
1
ProTip! What’s not been updated in a month: updated:<2025-04-04.