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Coroutine upvars are not required to be live in borrowck if witness has no drop requirements

A-async-awaitArea: Async & Await Area: Async & Await

A-borrow-checkerArea: The borrow checker Area: The borrow checker

C-bugCategory: This is a bug. Category: This is a bug.

I-unsoundIssue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness

P-criticalCritical priority Critical priority

S-has-bisectionStatus: A bisection has been found for this issue Status: A bisection has been found for this issue

Status: Closed (completed).

#144155 In rust-lang/rust;

· by compiler-errors was closed on Aug 11, 2025

Adding <code>Self: Sized</code> alters <code>AsyncFnOnce</code> bounds

A-async-awaitArea: Async & Await Area: Async & Await

A-async-closures`async || {}` `async || {}`

C-bugCategory: This is a bug. Category: This is a bug.

fixed-by-next-solverFixed by the next-generation trait solver, `-Znext-solver`. Fixed by the next-generation trait solver, `-Znext-solver`.

T-typesRelevant to the types team, which will review and decide on the PR/issue. Relevant to the types team, which will review and decide on the PR/issue.

Status: Closed (completed).

#137781 In rust-lang/rust;

· by ilslv was closed on Apr 7, 2025

ICE: index out of bounds, instrument coverage

A-async-awaitArea: Async & Await Area: Async & Await

A-async-closures`async || {}` `async || {}`

A-code-coverageArea: Source-based code coverage (-Cinstrument-coverage) Area: Source-based code coverage (-Cinstrument-coverage)

AsyncAwait-TriagedAsync-await issues that have been triaged during a working group meeting. Async-await issues that have been triaged during a working group meeting.

C-bugCategory: This is a bug. Category: This is a bug.

I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️

S-bug-has-testStatus: This bug is tracked inside the repo by a `known-bug` test. Status: This bug is tracked inside the repo by a `known-bug` test.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Closed (completed).

#131190 In rust-lang/rust;

· by matthiaskrgr was closed on Oct 18, 2024

ICE: <code>leftover child captures?</code>

A-async-awaitArea: Async & Await Area: Async & Await

AsyncAwait-TriagedAsync-await issues that have been triaged during a working group meeting. Async-await issues that have been triaged during a working group meeting.

C-bugCategory: This is a bug. Category: This is a bug.

I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️

S-bug-has-testStatus: This bug is tracked inside the repo by a `known-bug` test. Status: This bug is tracked inside the repo by a `known-bug` test.

S-has-mcveStatus: A Minimal Complete and Verifiable Example has been found for this issue Status: A Minimal Complete and Verifiable Example has been found for this issue

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Closed (completed).

#123901 In rust-lang/rust;

· by matthiaskrgr was closed on May 12, 2024

<code>Unexpected initial operand type</code> with async closures and <code>FnOnce</code>

A-async-awaitArea: Async & Await Area: Async & Await

A-async-closures`async || {}` `async || {}`

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

T-typesRelevant to the types team, which will review and decide on the PR/issue. Relevant to the types team, which will review and decide on the PR/issue.

Status: Closed (completed).

#123251 In rust-lang/rust;

· by compiler-errors was closed on Apr 3, 2024

internal compiler error when copying borrow of leaked Box into async move closure for FutureExt::then

A-async-awaitArea: Async & Await Area: Async & Await

A-MIRArea: Mid-level IR (MIR) - https://blog.rust-lang.org/2016/04/19/MIR.html Area: Mid-level IR (MIR) - https://blog.rust-lang.org/2016/04/19/MIR.html

AsyncAwait-TriagedAsync-await issues that have been triaged during a working group meeting. Async-await issues that have been triaged during a working group meeting.

C-bugCategory: This is a bug. Category: This is a bug.

E-needs-mcveCall for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example Call for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example

I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Closed (completed).

#123334 In rust-lang/rust;

· by Pr0methean was closed on Jun 29, 2024

rustc reports misc message with impl conflict of trait with AFIT and assoc type.

A-async-awaitArea: Async & Await Area: Async & Await

A-diagnosticsArea: Messages for errors, warnings, and lints Area: Messages for errors, warnings, and lints

AsyncAwait-TriagedAsync-await issues that have been triaged during a working group meeting. Async-await issues that have been triaged during a working group meeting.

D-confusingDiagnostics: Confusing error or lint that should be reworked. Diagnostics: Confusing error or lint that should be reworked.

D-terseDiagnostics: An error or lint that doesn't give enough information about the problem at hand. Diagnostics: An error or lint that doesn't give enough information about the problem at hand.

F-async_fn_in_traitStatic async fn in traits Static async fn in traits

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Closed (completed).

#116982 In rust-lang/rust;

· by Berrysoft was closed on Oct 25, 2023

AFIT no longer seems to play nice with lifetime GATs

A-async-awaitArea: Async & Await Area: Async & Await

A-implied-boundsArea: Implied bounds / inferred outlives-bounds Area: Implied bounds / inferred outlives-bounds

A-lifetimesArea: Lifetimes / regions Area: Lifetimes / regions

C-bugCategory: This is a bug. Category: This is a bug.

F-async_fn_in_traitStatic async fn in traits Static async fn in traits

requires-nightlyThis issue requires a nightly compiler in some way. This issue requires a nightly compiler in some way.

Status: Closed (completed).

#113796 In rust-lang/rust;

· by yoshuawuyts was closed on Jul 30, 2023

[BUG] Stable (warning): Async traits Self return requires type specification

A-async-awaitArea: Async & Await Area: Async & Await

AsyncAwait-TriagedAsync-await issues that have been triaged during a working group meeting. Async-await issues that have been triaged during a working group meeting.

C-bugCategory: This is a bug. Category: This is a bug.

F-async_fn_in_traitStatic async fn in traits Static async fn in traits

requires-nightlyThis issue requires a nightly compiler in some way. This issue requires a nightly compiler in some way.

Status: Closed (completed).

#113538 In rust-lang/rust;

· by Arthurdw was closed on Jan 26, 2024

Perform autoref/autoderef on <code>.await</code>

A-async-awaitArea: Async & Await Area: Async & Await

AsyncAwait-TriagedAsync-await issues that have been triaged during a working group meeting. Async-await issues that have been triaged during a working group meeting.

S-waiting-on-authorStatus: This is awaiting some action (such as code changes or more information) from the author. Status: This is awaiting some action (such as code changes or more information) from the author.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

T-langRelevant to the language team Relevant to the language team

WG-asyncWorking group: Async & await Working group: Async & await

Status: Closed (abandoned).

rust-lang/rustnumber 111773

#111773 In rust-lang/rust;

· by Jules-Bertholet was closed on Apr 23, 2024

Fix RPIT in default async trait method

A-async-awaitArea: Async & Await Area: Async & Await

AsyncAwait-TriagedAsync-await issues that have been triaged during a working group meeting. Async-await issues that have been triaged during a working group meeting.

C-bugCategory: This is a bug. Category: This is a bug.

F-async_fn_in_traitStatic async fn in traits Static async fn in traits

F-return_position_impl_trait_in_trait`#![feature(return_position_impl_trait_in_trait)]` `#![feature(return_position_impl_trait_in_trait)]`

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Closed (completed).

#108304 In rust-lang/rust;

· by Swatinem was closed on Jul 31, 2023

Unclear error message on async closure

A-async-awaitArea: Async & Await Area: Async & Await

A-diagnosticsArea: Messages for errors, warnings, and lints Area: Messages for errors, warnings, and lints

AsyncAwait-PolishAsync-await issues that are part of the "polish" area Async-await issues that are part of the "polish" area

AsyncAwait-TriagedAsync-await issues that have been triaged during a working group meeting. Async-await issues that have been triaged during a working group meeting.

D-confusingDiagnostics: Confusing error or lint that should be reworked. Diagnostics: Confusing error or lint that should be reworked.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Closed (completed).

#100755 In rust-lang/rust;

· by adhesivee was closed on Sep 6, 2022