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diagnostics: pin_ergonomics: unused_mut spans are wrong, would destroy code

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.

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

D-imprecise-spansDiagnostics: spans don't point to exactly the erroneous codeDiagnostics: spans don't point to exactly the erroneous code

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

L-unused_mutLint: unused_mutLint: unused_mut

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.

#142077 In rust-lang/rust;

· matthiaskrgr opened on Jun 5, 2025

<code>unused_assignment</code> triggered by closure even though value is used

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

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.

D-imprecise-spansDiagnostics: spans don't point to exactly the erroneous codeDiagnostics: spans don't point to exactly the erroneous code

L-unused_assignmentsLint: unused_assignmentsLint: unused_assignments

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.

#141615 In rust-lang/rust;

· y86-dev opened on May 26, 2025

wrong span for E0277

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

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

D-imprecise-spansDiagnostics: spans don't point to exactly the erroneous codeDiagnostics: spans don't point to exactly the erroneous code

D-incorrectDiagnostics: A diagnostic that is giving misleading or incorrect information.Diagnostics: A diagnostic that is giving misleading or incorrect information.

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.

#141234 In rust-lang/rust;

· jendrikw opened on May 18, 2025

Unuseful span in type error in some format_args!() invocations

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

A-fmtArea: `core::fmt`Area: `core::fmt`

D-imprecise-spansDiagnostics: spans don't point to exactly the erroneous codeDiagnostics: spans don't point to exactly the erroneous code

E-help-wantedCall for participation: Help is requested to fix this issue.Call for participation: Help is requested to fix this issue.

P-lowLow priorityLow priority

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.

#140578 In rust-lang/rust;

· m-ou-se opened on May 2, 2025

Type mismatch in a associated type bound don't point at said associated type

A-associated-itemsArea: Associated items (types, constants & functions)Area: Associated items (types, constants & functions)

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

D-imprecise-spansDiagnostics: spans don't point to exactly the erroneous codeDiagnostics: spans don't point to exactly the erroneous code

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.

#139531 In rust-lang/rust;

· ShE3py opened on Apr 8, 2025

improve spans for <code>CallArgument</code> constraints

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

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

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

D-imprecise-spansDiagnostics: spans don't point to exactly the erroneous codeDiagnostics: spans don't point to exactly the erroneous code

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.

#135238 In rust-lang/rust;

· lcnr opened on Jan 8, 2025

E0308 Suggestion gets added to unrelated code and error span is too big

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

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

D-imprecise-spansDiagnostics: spans don't point to exactly the erroneous codeDiagnostics: spans don't point to exactly the erroneous code

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.

#134445 In rust-lang/rust;

· LasterAlex opened on Dec 17, 2024

<code>std::arch::wasm::unreachable()</code> is stable but does not compile

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

A-stabilityArea: `#[stable]`, `#[unstable]` etc.Area: `#[stable]`, `#[unstable]` etc.

D-imprecise-spansDiagnostics: spans don't point to exactly the erroneous codeDiagnostics: spans don't point to exactly the erroneous code

D-papercutDiagnostics: An error or lint that needs small tweaks.Diagnostics: An error or lint that needs small tweaks.

O-wasmTarget: WASM (WebAssembly), http://webassembly.org/Target: WASM (WebAssembly), http://webassembly.org/

Status: Open.

#133015 In rust-lang/rust;

· eric-seppanen opened on Nov 13, 2024

Incorrect reporting of asm labels in Nightly

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.

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

D-imprecise-spansDiagnostics: spans don't point to exactly the erroneous codeDiagnostics: spans don't point to exactly the erroneous code

L-binary_asm_labelsLint: LLVM parses labels like 0, 1, 10, 11, etc. oddlyLint: LLVM parses labels like 0, 1, 10, 11, etc. oddly

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.

#128659 In rust-lang/rust;

· corigan01 opened on Aug 4, 2024

Missing trait error for type (used as a type parameter) containing a trait object can have a broader span than expected

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

A-dyn-traitArea: trait objects, vtable layoutArea: trait objects, vtable layout

A-trait-systemArea: Trait systemArea: Trait system

D-imprecise-spansDiagnostics: spans don't point to exactly the erroneous codeDiagnostics: spans don't point to exactly the erroneous code

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.

#103547 In rust-lang/rust;

· Imberflur opened on Oct 25, 2022

weird "private trait" errors around ptr::metadata for public struct wrapping private trait object

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

A-trait-systemArea: Trait systemArea: Trait system

A-visibilityArea: Visibility / privacyArea: Visibility / privacy

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

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

D-imprecise-spansDiagnostics: spans don't point to exactly the erroneous codeDiagnostics: spans don't point to exactly the erroneous code

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.

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

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-libsRelevant to the library team, which will review and decide on the PR/issue.Relevant to the library team, which will review and decide on the PR/issue.

Status: Open.

#97984 In rust-lang/rust;

· ben0x539 opened on Jun 11, 2022