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Issues list

ICE：called Option::unwrap() on a None value A-async-await Area: Async & Await A-const-prop Area: Constant propagation C-bug Category: This is a bug. E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. 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.
#140469 opened Apr 29, 2025 by sososopy
1
Clean up implicit const promotion behavior A-const-prop Area: Constant propagation A-maybe-future-edition Something we may consider for a future edition. C-enhancement Category: An issue proposing an enhancement or a PR with one. 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. WG-const-eval Working group: Const evaluation
#124328 opened Apr 24, 2024 by RalfJung
2
rustc is unable to evaluate a singular conditional pathway predicated on the length of an array literal A-const-prop Area: Constant propagation A-lints Area: Lints (warnings about flaws in source code) such as unused_mut. C-bug Category: This is a bug. L-unconditional_panic Lint: unconditional_panic T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#119908 opened Jan 12, 2024 by barabadzhi
1
@barabadzhi
3
Remove duplicate diagnostics introduced by #119432 A-const-eval Area: Constant evaluation, covers all const contexts (static, const fn, ...) A-const-prop Area: Constant propagation A-diagnostics Area: Messages for errors, warnings, and lints 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.
#119647 opened Jan 6, 2024 by gurry
1
Compiling with overflow-checks = true is slow and uses high amounts of RAM A-const-prop Area: Constant propagation C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such 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.
#117295 opened Oct 27, 2023 by Zannick
4
const_prop_lint can't tell when code guarded with && is dead A-const-prop Area: Constant propagation A-lints Area: Lints (warnings about flaws in source code) such as unused_mut. C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#113905 opened Jul 20, 2023 by SvenKeimpema
8
rustc will emit code for const-eval false branches A-codegen Area: Code generation A-const-prop Area: Constant propagation C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#108857 opened Mar 7, 2023 by Voultapher
Limited constant propagation on Enum tag when Box is involved A-const-prop Area: Constant propagation A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such I-slow Issue: Problems and improvements with respect to performance of generated code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#106936 opened Jan 16, 2023 by douglas-raillard-arm
2
unconditional_panic lint getting recognized in code that actually panics condtionally A-const-prop Area: Constant propagation A-control-flow Area: Control flow A-lints Area: Lints (warnings about flaws in source code) such as unused_mut. C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#90534 opened Nov 3, 2021 by pro465
7
Return value from const_trait_impl did not promote to constant? A-const-eval Area: Constant evaluation, covers all const contexts (static, const fn, ...) A-const-prop Area: Constant propagation A-diagnostics Area: Messages for errors, warnings, and lints A-suggestion-diagnostics Area: Suggestions generated by the compiler applied by `cargo fix` D-newcomer-roadblock Diagnostics: Confusing error or lint; hard to understand for new users. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#69574 opened Feb 29, 2020 by crlf0710
8
ProTip! Updated in the last three days: updated:>2025-05-15.