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cargo fmt failure on Windows, too many command line args

A-cargo-fmtArea: cargo-fmtArea: cargo-fmt

A-ioArea: related to I/O by rustfmt (fs, stdin/stdout, etc.)Area: related to I/O by rustfmt (fs, stdin/stdout, 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

O-windowsOperating system: WindowsOperating system: Windows

Status: Open.

#6934 In rust-lang/rustfmt;

· riverar opened on May 31, 2026

eprintln! warnings are not (easily) testable

A-diagnosticsArea: diagnostics, of rustfmt itself or cargo-fmtArea: diagnostics, of rustfmt itself or cargo-fmt

C-discussionCategory: discussionCategory: discussion

Status: Open.

#6933 In rust-lang/rustfmt;

· jieyouxu opened on May 30, 2026

Discussion: enable Clippy lints in rustfmt source tree and CI

C-discussionCategory: discussionCategory: discussion

Status: Open.

#6923 In rust-lang/rustfmt;

· shulaoda opened on May 22, 2026

Rendered width of \t in line width calculation isn't fixed to config.tab_spaces()

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.

#6904 In rust-lang/rustfmt;

· shulaoda opened on May 22, 2026

Weird formatting of whitespace in between code and in-line comments

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.

#6896 In rust-lang/rustfmt;

· Robbepop opened on May 13, 2026

file-lines can't partially format trait bounds lists

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.

UO-file_linesUnstable option: file_linesUnstable option: file_lines

Status: Open.

#6894 In rust-lang/rustfmt;

· randomPoison opened on May 12, 2026

fn_params_layout = "Vertical" removes single argument's trailing comma

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

only-with-optionRequires a non-default option value to reproduceRequires a non-default option value to reproduce

SO-fn_params_layoutStable option: fn_params_layoutStable option: fn_params_layout

Status: Open.

#6889 In rust-lang/rustfmt;

· jasonaowen opened on May 10, 2026

Misses some files but catching others in big workspace

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.

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.

#6887 In rust-lang/rustfmt;

· Narfinger opened on May 8, 2026

file-lines can't format trait definition contents without formatting the header

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

UO-file_linesUnstable option: file_linesUnstable option: file_lines

Status: Open.

#6885 In rust-lang/rustfmt;

· randomPoison opened on May 5, 2026

file-lines can't partially format where clauses

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

UO-file_linesUnstable option: file_linesUnstable option: file_lines

Status: Open.

#6872 In rust-lang/rustfmt;

· randomPoison opened on Apr 18, 2026

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

UO-file_linesUnstable option: file_linesUnstable option: file_lines

Status: Open.

#6868 In rust-lang/rustfmt;

· randomPoison opened on Apr 17, 2026

file-lines modifies unselected fn signature lines when fn body is selected

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