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Issues list

if and else have incompatible types in a let statement, where else block's evaluation will never be assigned A-control-flow Area: Control flow A-diagnostics Area: Messages for errors, warnings, and lints D-confusing Diagnostics: Confusing error or lint that should be reworked. D-terse Diagnostics: An error or lint that doesn't give enough information about the problem at hand. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#133316 opened Nov 21, 2024 by shanebishop
3
"Binding is possibly uninitalized" reports some additional spans incorrectly in addition to the correct one A-control-flow Area: Control flow A-diagnostics Area: Messages for errors, warnings, and lints D-papercut Diagnostics: An error or lint that needs small tweaks. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#126133 opened Jun 7, 2024 by Arnavion
@linyihai
1
Some unused_parens suggestions can result in keyword soup (even if technically correct). A-control-flow Area: Control flow A-diagnostics Area: Messages for errors, warnings, and lints A-lints Area: Lints (warnings about flaws in source code) such as unused_mut. L-unused_parens Lint: unused_parens T-lang Relevant to the language team, which will review and decide on the PR/issue.
#114161 opened Jul 28, 2023 by eddyb
"Unreachable definition" warning after infallible expression in if-block 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. L-unreachable_code Lint: unreachable_code T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#111370 opened May 8, 2023 by fnetz
2
Compiler incorrectly understand initialisation of vars with patterns. A-control-flow Area: Control flow A-patterns Relating to patterns and pattern matching C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#110452 opened Apr 17, 2023 by lovely-error
1
"unreachable_code" warns even on "unreachable!" itself A-control-flow Area: Control flow A-diagnostics Area: Messages for errors, warnings, and lints A-lints Area: Lints (warnings about flaws in source code) such as unused_mut. L-unreachable_code Lint: unreachable_code T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#107953 opened Feb 12, 2023 by safinaskar
18
Unexpectedly long lifetime of values created in let bindings A-control-flow Area: Control flow 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.
#98052 opened Jun 13, 2022 by theduke
5
Can't return reference to passed-in referent that is assigned in a loop A-borrow-checker Area: The borrow checker A-control-flow Area: Control flow A-NLL Area: Non-lexical lifetimes (NLL) C-bug Category: This is a bug. fixed-by-polonius Compiling with `-Zpolonius` fixes this issue. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#97901 opened Jun 8, 2022 by jonhoo
2
Recursive call warning does not appear inside a match statement 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. C-enhancement Category: An issue proposing an enhancement or a PR with one. L-unconditional_recursion Lint: unconditional_recursion T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#94778 opened Mar 9, 2022 by levkk
Inserting a conditional break in working code causes strange borrowck error A-borrow-checker Area: The borrow checker A-control-flow Area: Control flow C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#91363 opened Nov 29, 2021 by SNCPlay42
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
Suggest removing let when unused variable shadows another variable A-control-flow Area: Control flow A-diagnostics Area: Messages for errors, warnings, and lints A-lints Area: Lints (warnings about flaws in source code) such as unused_mut. A-resolve Area: Name/path resolution done by `rustc_resolve` specifically 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.
#84664 opened Apr 28, 2021 by meithecatte
Confusing lifetime error in the presence of a loop A-borrow-checker Area: The borrow checker A-control-flow Area: Control flow A-diagnostics Area: Messages for errors, warnings, and lints D-papercut Diagnostics: An error or lint that needs small tweaks. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#81673 opened Feb 2, 2021 by jyn514
3
Diagnostics Improvement: Same Body in Branches 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-lang Relevant to the language team, which will review and decide on the PR/issue.
#79210 opened Nov 19, 2020 by jamesmunns
2
unreachable warning when an unreachable!() macro is called A-control-flow Area: Control flow A-lints Area: Lints (warnings about flaws in source code) such as unused_mut. C-feature-request Category: A feature request, i.e: not implemented / a PR.
#79157 opened Nov 18, 2020 by gilescope
2
ProTip! Updated in the last three days: updated:>2025-05-06.