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file-lines can't partially format function signatures

C-bugCategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICECategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICE

needs-triageThis issue or PR needs triaging to determine its status. Remove label once sufficiently triaged.This issue or PR needs triaging to determine its status. Remove label once sufficiently triaged.

Status: Open.

#6868 In rust-lang/rustfmt;

· randomPoison opened on Apr 17, 2026

Certain match expressions are unnecessarily indented and placed on next line

A-call-chainsArea: method call chainsArea: method call chains

A-expressionsArea: expressionsArea: expressions

A-matchesArea: match arms, patterns, blocks, etcArea: match arms, patterns, blocks, etc

C-bugCategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICECategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICE

S-has-mcveStatus: a Minimal Complete and Verifiable Example has been found for this issueStatus: a Minimal Complete and Verifiable Example has been found for this issue

Status: Open.

#6865 In rust-lang/rustfmt;

· taylordotfish opened on Apr 16, 2026

file-lines modifies unselected fn signature lines

C-bugCategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICECategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICE

S-has-mcveStatus: a Minimal Complete and Verifiable Example has been found for this issueStatus: a Minimal Complete and Verifiable Example has been found for this issue

UO-file_linesUnstable option: file_linesUnstable option: file_lines

Status: Open.

#6864 In rust-lang/rustfmt;

· randomPoison opened on Apr 15, 2026

file-lines can modify lines above the selected range

C-bugCategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICECategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICE

S-has-mcveStatus: a Minimal Complete and Verifiable Example has been found for this issueStatus: a Minimal Complete and Verifiable Example has been found for this issue

UO-file_linesUnstable option: file_linesUnstable option: file_lines

Status: Open.

#6863 In rust-lang/rustfmt;

· randomPoison opened on Apr 15, 2026

How should group_imports handle visibility?

C-discussionCategory: discussionCategory: discussion

T-styleRelevant to the style team.Relevant to the style team.

UO-group_importsUnstable option: group_importsUnstable option: group_imports

Status: Open.

#6861 In rust-lang/rustfmt;

· camsteffen opened on Apr 13, 2026

Bad hard-tabs handling with blocks in long expressions

A-whitespaceArea: whitespace and its handlingArea: whitespace and its handling

C-bugCategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICECategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICE

I-poor-formattingIssue: poor formattingIssue: poor formatting

Status: Open.

#6859 In rust-lang/rustfmt;

· edwloef opened on Apr 8, 2026

[Feature Request] allow blank line as first line within functions

A-whitespaceArea: whitespace and its handlingArea: whitespace and its handling

C-feature-requestCategory: a feature request (not decided/implemented)Category: a feature request (not decided/implemented)

P-lowLow priorityLow priority

Status: Open.

#6854 In rust-lang/rustfmt;

· bogzbonny opened on Apr 3, 2026

[ICE]: end byte index 100 is not a char boundary; it is inside '☃' (bytes 98..101 of string)

A-unicodeArea: Unicode handlingArea: Unicode handling

C-bugCategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICECategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICE

I-ICEIssue: Internal Compiler Error (ICE) reported by rustfmtIssue: Internal Compiler Error (ICE) reported by rustfmt

Status: Open.

#6850 In rust-lang/rustfmt;

· jieyouxu opened on Apr 1, 2026

max_width not obeyed in match arm tuple

A-matchesArea: match arms, patterns, blocks, etcArea: match arms, patterns, blocks, etc

C-bugCategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICECategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICE

F-impacts-stable-formatted-codeExpected formatting impact: affects stable formatted code (caution)Expected formatting impact: affects stable formatted code (caution)

F-impacts-stable-optionsExpected formatting impact: impacts stable options (caution)Expected formatting impact: impacts stable options (caution)

I-max-widthIssue: formatting exceeds maximum widthIssue: formatting exceeds maximum width

S-has-mcveStatus: a Minimal Complete and Verifiable Example has been found for this issueStatus: a Minimal Complete and Verifiable Example has been found for this issue

Status: Open.

#6848 In rust-lang/rustfmt;

· warrd opened on Mar 31, 2026

Rustc ICE while formatting

A-unicodeArea: Unicode handlingArea: Unicode handling

I-ICEIssue: Internal Compiler Error (ICE) reported by rustfmtIssue: Internal Compiler Error (ICE) reported by rustfmt

S-needs-reproStatus: this issue has no reproduction and needs a reproduction to make progressStatus: this issue has no reproduction and needs a reproduction to make progress

Status: Open.

#6847 In rust-lang/rustfmt;

· ThatGeoGuy opened on Mar 30, 2026

ICE when running cargo fmt -- --config-path ../foo/bar.toml with unstable ignore feature

I-ICEIssue: Internal Compiler Error (ICE) reported by rustfmtIssue: Internal Compiler Error (ICE) reported by rustfmt

P-lowLow priorityLow priority

Status: Open.

#6843 In rust-lang/rustfmt;

· davidgauch opened on Mar 26, 2026

rustfmt rewrites valid impl<T: /*comment*/> into invalid syntax with ,,

A-commentsArea: commentsArea: comments

A-trait-boundsArea: trait boundsArea: trait bounds

C-bugCategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICECategory: this is a bug; use also I-* labels for specific bug kinds, e.g. I-non-idempotency or I-ICE

I-invalid-codeIssue: formatting causes compile-pass code to compile-failIssue: formatting causes compile-pass code to compile-fail

Status: Open.

#6837 In rust-lang/rustfmt;

· Marsman1996 opened on Mar 23, 2026