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E0412 and E0425 are redundant

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

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

C-cleanupCategory: PRs that clean code up or issues documenting cleanup.Category: PRs that clean code up or issues documenting cleanup.

E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.Call for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.

E-mentorCall for participation: This issue has a mentor. Use #t-compiler/help on Zulip for discussion.Call for participation: This issue has a mentor. Use #t-compiler/help on Zulip for discussion.

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: Open.

#148558 In rust-lang/rust;

· theemathas opened on Nov 6, 2025

Diagnostic points to code with no explanation

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

A-closuresArea: Closures (`|…| { … }`)Area: Closures (`|…| { … }`)

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

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.

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: Open.

#148392 In rust-lang/rust;

· theemathas opened on Nov 2, 2025

Diagnostics incorrectly states that async closure implements <code>Fn</code>.

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

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

A-closuresArea: Closures (`|…| { … }`)Area: Closures (`|…| { … }`)

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

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: Open.

#148391 In rust-lang/rust;

· theemathas opened on Nov 2, 2025

Rust shouldn't suggest using a single lifetime everywhere

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

A-lifetimesArea: Lifetimes / regionsArea: Lifetimes / regions

D-invalid-suggestionDiagnostics: A structured suggestion resulting in incorrect code.Diagnostics: A structured suggestion resulting in incorrect code.

D-newcomer-roadblockDiagnostics: Confusing error or lint; hard to understand for new users.Diagnostics: Confusing error or lint; hard to understand for new users.

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: Open.

#148315 In rust-lang/rust;

· theemathas opened on Oct 31, 2025

for_loops_over_fallibles lint with macros give invalid suggestion

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

A-lintsArea: Lints (warnings about flaws in source code) such as unused_mut.Area: Lints (warnings about flaws in source code) such as unused_mut.

A-macrosArea: All kinds of macros (custom derive, macro_rules!, proc macros, ..)Area: All kinds of macros (custom derive, macro_rules!, proc macros, ..)

D-invalid-suggestionDiagnostics: A structured suggestion resulting in incorrect code.Diagnostics: A structured suggestion resulting in incorrect code.

L-for_loops_over_falliblesLint: for_loops_over_falliblesLint: for_loops_over_fallibles

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: Open.

#148114 In rust-lang/rust;

· theemathas opened on Oct 25, 2025

Rust suggests adding <code>else</code> to non-let assignment.

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

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: Open.

#145548 In rust-lang/rust;

· theemathas opened on Aug 18, 2025

Borrowcheck error with <code>break</code> blames trailing expression for borrowing

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

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: Open.

#145530 In rust-lang/rust;

· theemathas opened on Aug 17, 2025

Mismatched types causes ICE in <code>compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:2591:13</code>

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

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) ❄️

requires-debug-assertionsThis issue requires a build of rustc or tooling with debug-assertions in some wayThis issue requires a build of rustc or tooling with debug-assertions in some way

S-needs-reproStatus: This issue has no reproduction and needs a reproduction to make progress.Status: This issue has no reproduction and needs a reproduction to make progress.

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: Open.

#144984 In rust-lang/rust;

· theemathas opened on Aug 6, 2025

Trying to move a <code>&amp;mut</code> out of a <code>static</code> gives confusing error

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

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: Open.

#142772 In rust-lang/rust;

· theemathas opened on Jun 20, 2025

"type annotations needed" on associated type in trait of unknown type should point to that unknown type

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

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: Open.

#142334 In rust-lang/rust;

· theemathas opened on Jun 11, 2025

Transmuting fn pointer to a usize in const somehow causes UB?

A-const-evalArea: Constant evaluation, covers all const contexts (static, const fn, ...)Area: Constant evaluation, covers all const contexts (static, const fn, ...)

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

C-discussionCategory: Discussion or questions that doesn't represent real issues.Category: Discussion or questions that doesn't represent real issues.

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: Open.

#142230 In rust-lang/rust;

· theemathas opened on Jun 9, 2025

Forgetting a right angle bracket (<code>&gt;</code>) gives: "error: <code>Fn</code> traits cannot take lifetime parameters"

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

A-parserArea: The lexing & parsing of Rust source code to an ASTArea: The lexing & parsing of Rust source code to an AST

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: Open.

#141436 In rust-lang/rust;

· theemathas opened on May 23, 2025