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Draft release notes for 1.87
#140133 opened Apr 21, 2025 by BoxyUwU
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Issues list

rustdoc hangs on recursive associated types A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-synthetic-impls Area: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls A-trait-system Area: Trait system C-bug Category: This is a bug. fixed-by-next-solver Fixed by the next-generation trait solver, `-Znext-solver`. I-hang Issue: The compiler never terminates, due to infinite loops, deadlock, livelock, etc. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#139964 opened Apr 17, 2025 by theemathas
@fmease
5
[async closure] implementation of Send is not general enough using tokio channel A-async-closures `async || {}` A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-concurrency Area: Concurrency C-bug Category: This is a bug. needs-triage This issue may need triage. Remove it if it has been sufficiently triaged.
#139475 opened Apr 7, 2025 by Banyc
1
[bug] When I Use tauri-plugin-http and reqwest either, I got a panic A-async-await Area: Async & Await A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-coercions Area: implicit and explicit `expr as Type` coercions A-dyn-trait Area: trait objects, vtable layout C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ P-medium Medium priority regression-from-stable-to-stable Performance or correctness regression from one stable version to another. 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. T-types Relevant to the types team, which will review and decide on the PR/issue.
#138274 opened Mar 9, 2025 by Wan9xy
@compiler-errors
8
rustdoc: ICE: synthetic auto trait impls: failed to unify obligation A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-synthetic-impls Area: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls C-bug Category: This is a bug. 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. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#136778 opened Feb 9, 2025 by Jazzpirate
@fmease
rustdoc: ICE: synthetic auto trait impls: unexpected result when selecting […] A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-synthetic-impls Area: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#135363 opened Jan 11, 2025 by mattsse
@fmease
Higher ranked lifetime error when checking auto traits of async functions containing calls to async closures which capture a local A-async-closures `async || {}` A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#134997 opened Jan 1, 2025 by jdonszelmann
8
rustdoc: ICE: Cannot turn UnevaluatedConst into AliasTy when synthesizing auto trait impls A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-synthetic-impls Area: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls 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) ❄️ requires-nightly This issue requires a nightly compiler in some way. S-has-mcve Status: A Minimal Complete and Verifiable Example has been found for this issue T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#134775 opened Dec 26, 2024 by sigurd4
1 of 4 tasks
@fmease
2
auto trait leakage can be used to leak arbitrary types A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-impl-trait Area: `impl Trait`. Universally / existentially quantified anonymous types with static dispatch. C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ I-types-nominated Nominated for discussion during a types team meeting. T-types Relevant to the types team, which will review and decide on the PR/issue.
#134578 opened Dec 20, 2024 by lcnr
rustdoc: ICE: synthetic auto trait impls: unexpected result when selecting […] A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-synthetic-impls Area: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#127593 opened Jul 11, 2024 by programmerjake
@fmease
Bug when using .flatten() method that has Item = &'a T when calling async function inside loop A-async-await Area: Async & Await A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-diagnostics Area: Messages for errors, warnings, and lints A-trait-system Area: Trait system AsyncAwait-Triaged Async-await issues that have been triaged during a working group meeting. C-bug Category: This is a bug. D-confusing Diagnostics: Confusing error or lint that should be reworked.
#126044 opened Jun 5, 2024 by p0lunin
5
rustdoc: array primitive auto trait impls are not always canonical A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-synthetic-impls Area: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls C-bug Category: This is a bug. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#124931 opened May 9, 2024 by zachs18
@fmease
2
rustdoc: ICE: synthetic auto trait impls: no region_name found involving user-written impl that applies to higher-ranked lifetimes A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-higher-ranked Area: Higher-ranked things (e.g., lifetimes, types, trait bounds aka HRTBs) A-lifetimes Area: Lifetimes / regions A-synthetic-impls Area: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#123298 opened Mar 31, 2024 by fmease
@fmease
1
Recursive async functions don't internally implement auto traits A-async-await Area: Async & Await A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-trait-system Area: Trait system AsyncAwait-Triaged Async-await issues that have been triaged during a working group meeting. C-bug Category: This is a bug. fixed-by-next-solver Fixed by the next-generation trait solver, `-Znext-solver`. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. WG-async Working group: Async & await
#123072 opened Mar 26, 2024 by drewtato
1
rustdoc: ICE: synthetic auto trait impls: unexpected region: RePlaceholder[…] involving TAIT A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-lifetimes Area: Lifetimes / regions A-synthetic-impls Area: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls C-bug Category: This is a bug. F-type_alias_impl_trait `#[feature(type_alias_impl_trait)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ 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. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#120606 opened Feb 3, 2024 by Sherlock-Holo
@fmease
1
ICE with "failed to resolve instance for <... as IntoFuture>::into_future: Ok(None)" (regression between 1.73 and 1.74) A-async-await Area: Async & Await A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) AsyncAwait-Triaged Async-await issues that have been triaged during a working group meeting. C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ P-medium Medium priority regression-from-stable-to-stable Performance or correctness regression from one stable version to another. S-bug-has-test Status: This bug is tracked inside the repo by a `known-bug` test. 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-async Working group: Async & await
#119095 opened Dec 18, 2023 by 42triangles
10
rustdoc: ICE: synthetic auto trait impls: unexpected result when selecting […] obligation involving (nested) projections A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-synthetic-impls Area: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls C-bug Category: This is a bug. 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. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#116539 opened Oct 8, 2023 by drahnr
@fmease
8
rustdoc: don't render the auto of auto traits A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-rustdoc-ui Area: Rustdoc UI (generated HTML) C-bug Category: This is a bug. P-low Low priority T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#116268 opened Sep 29, 2023 by fmease
Changing async function body causes caller to fail A-async-await Area: Async & Await A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) AsyncAwait-Triaged Async-await issues that have been triaged during a working group meeting. C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#116048 opened Sep 22, 2023 by TylerHorth
6
rustdoc: ICE: synthetic auto trait impls: unexpected result when selecting […] obligation A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-synthetic-impls Area: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls C-bug Category: This is a bug. E-needs-mcve Call for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example 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. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#114097 opened Jul 26, 2023 by cboudereau
@fmease
1
rustdoc: synthetic impls are faulty in the presence of assoc const equality constraints A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-synthetic-impls Area: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls C-bug Category: This is a bug. F-associated_const_equality `#![feature(associated_const_equality)]` T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#111102 opened May 2, 2023 by fmease
rustdoc: synthetic impls don't include bounds that originate from the implementing type A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-synthetic-impls Area: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls C-bug Category: This is a bug. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#111101 opened May 2, 2023 by fmease
@fmease
rustdoc: ICE: synthetic auto trait impls: unable to fulfill trait […] due to ambiguity involving higher-ranked lifetimes & projection predicates A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-higher-ranked Area: Higher-ranked things (e.g., lifetimes, types, trait bounds aka HRTBs) A-synthetic-impls Area: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls C-bug Category: This is a bug. 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. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#110741 opened Apr 23, 2023 by matthiaskrgr
@fmease
2
rustdoc: ICE: synthetic auto trait impls: failed to fully process […] involving projections & projection predicates A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-synthetic-impls Area: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls C-bug Category: This is a bug. 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. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#110740 opened Apr 23, 2023 by matthiaskrgr
@fmease
3
hrtb + infer types break auto traits with return type notation A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-higher-ranked Area: Higher-ranked things (e.g., lifetimes, types, trait bounds aka HRTBs) C-bug Category: This is a bug. F-return_type_notation `#[feature(return_type_notation)]` T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#109924 opened Apr 4, 2023 by compiler-errors
@compiler-errors
1
Inconsistent behavior of auto_traits+negative_impls across crates. A-auto-traits Area: auto traits (e.g., `auto trait Send {}`) A-trait-system Area: Trait system C-bug Category: This is a bug. F-auto_traits `#![feature(auto_traits)]` F-negative_impls #![feature(negative_impls)] T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#108995 opened Mar 10, 2023 by booti386
3
ProTip! no:milestone will show everything without a milestone.