rust-lang/rustfmt

View on GitHub

Format Rust code

Stars: 7k
Forks: 1.1k
Open beginner issues: 2
Indexed issues: 723
Avg merge: 2d 13h
Merged PRs (30d): 24

Dominant language: Rust
License: Apache-2.0
Last GitHub push: Sep 17, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue hacktoberfest

Beginner friendly Everything

Open All

723 open issues indexed

Fix `first_line_width` to be tab-aware Open

A-whitespace C-bug SO-hard_tabs

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

rust-lang/rustfmt#7122 · Opened Sep 15, 2026
Check `filtered_str_fit` for tab handling Open

A-whitespace C-bug SO-hard_tabs

Difficulty 3/5 1-2 days Newbie friendliness 52/100

rust-lang/rustfmt#7121 · Opened Sep 15, 2026
[Feature Request] Allow configurable number of blank lines before control structures Open

C-feature-request P-low

Difficulty 5/5 Over a week Newbie friendliness 45/100

rust-lang/rustfmt#7120 · 1 reaction · Opened Sep 14, 2026
Ugly formatting Open

A-call-chains C-bug I-poor-formatting

Difficulty 3/5 1-2 days Newbie friendliness 68/100

rust-lang/rustfmt#7119 · 3 comments · Opened Sep 13, 2026
Look for config in `.cargo/rustfmt.toml` and `.config/rustfmt.toml` Open

C-feature-request P-low

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

rust-lang/rustfmt#7114 · 1 reaction · Opened Sep 11, 2026
Closure parameter wrapping appears to ignore block-prefix width Open

A-async-blocks A-blocks A-closures A-gen-blocks C-bug SO-max_width

Difficulty 3/5 1-2 days Newbie friendliness 72/100

rust-lang/rustfmt#7113 · 5 comments · Opened Sep 11, 2026
Tests for --file-lines Open

A-test-harness A-test-suite C-discussion

Difficulty 3/5 1-2 days Newbie friendliness 68/100

rust-lang/rustfmt#7112 · 2 comments · Opened Sep 9, 2026
Block doc comment without continuing asterisk (`*`) doesn't align asterisk in starter/closer Open

A-doc-comments C-discussion

Difficulty 3/5 1-2 days Newbie friendliness 64/100

rust-lang/rustfmt#7109 · Opened Sep 8, 2026
rustfmt does not format panic! macro under a specific circumstance Open

A-strings C-bug I-max-width

Difficulty 4/5 3-5 days Newbie friendliness 58/100

rust-lang/rustfmt#7102 · 2 comments · Opened Sep 5, 2026
Rewriting `r#try!` at root of chain generates bad code Open

A-call-chains A-comments C-bug I-invalid-code SO-use_try_shorthand

Difficulty 3/5 1-2 days Newbie friendliness 68/100

rust-lang/rustfmt#7101 · 3 comments · Opened Sep 5, 2026
[ICE]: bad span: `)`: ` `; `cfg_select!` invalid arm expr "successfully" formats but produces an ICE report Open

A-cfg_select A-test-harness C-bug I-ICE

Difficulty 3/5 1-2 days Newbie friendliness 58/100

rust-lang/rustfmt#7087 · 3 comments · Opened Aug 29, 2026
Chains of functions with a comment on the last function do not format Open

A-call-chains A-comments C-bug I-poor-formatting

Difficulty 3/5 1-2 days Newbie friendliness 68/100

rust-lang/rustfmt#7086 · 2 comments · Opened Aug 29, 2026
`#[rustfmt::skip]` attribute skips extra lines Open

A-rustfmt::skip C-bug E-hard E-medium

Difficulty 3/5 1-2 days Newbie friendliness 75/100

rust-lang/rustfmt#7076 · 4 comments · 1 reaction · Opened Aug 27, 2026
--file-lines can trip up trailing whitespace validity check Open

C-bug I-trailing-whitespace UO-error_on_unformatted UO-file_lines

rust-lang/rustfmt#7071 · 2 comments · 1 assignee · Opened Aug 25, 2026
normalize_doc_attributes + wrap_comments can leave trailing whitespace Open

A-doc-comments C-bug I-trailing-whitespace UO-normalize_doc_attributes UO-wrap_comments

Difficulty 3/5 1-2 days Newbie friendliness 68/100

rust-lang/rustfmt#7069 · 9 comments · Opened Aug 25, 2026
rustfmt switches `;` around causing type error Open

A-control-flow C-bug I-invalid-code

rust-lang/rustfmt#7061 · 1 comment · 1 assignee · Opened Aug 24, 2026
comma is removed from `#[cfg_attr(` which causes syntax error Open

A-attributes A-cfg C-bug I-invalid-code

Difficulty 3/5 1-2 days Newbie friendliness 68/100

rust-lang/rustfmt#7058 · 5 comments · Opened Aug 24, 2026
rustfmt duplicates Trait identifier causing syntax error Open

C-bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

rust-lang/rustfmt#7053 · 1 comment · Opened Aug 23, 2026
rustfmt losing comments, weird-exprs edition Open

A-comments C-bug E-needs-mcve I-unexpectedly-removes-code P-low

Difficulty 4/5 3-5 days Newbie friendliness 58/100

rust-lang/rustfmt#7052 · 4 comments · Opened Aug 23, 2026
removes comment after import Open

A-comments A-imports C-bug E-easy I-unexpectedly-removes-code

Difficulty 3/5 1-2 days Newbie friendliness 70/100

rust-lang/rustfmt#7051 · 4 comments · Opened Aug 23, 2026
`cfg_select!` in expr position broken after formatting Open

A-macros C-bug I-invalid-code I-unexpectedly-removes-code

Difficulty 3/5 1-2 days Newbie friendliness 72/100

rust-lang/rustfmt#7045 · 1 reaction · Opened Aug 22, 2026
`#[cfg_attr(..., path = ...)]` on inline modules is not recognized Open

A-cfg A-modules C-bug

rust-lang/rustfmt#7038 · 2 comments · 1 assignee · Opened Aug 21, 2026
Make sure our CI workflows build with `--locked` Open

A-CI A-supply-chain-security C-bug

rust-lang/rustfmt#7037 · 8 comments · 1 assignee · Opened Aug 20, 2026
[ICE with debug-assertions]: Span must not be empty and have no suggestion Open

A-macros A-parser C-bug I-ICE

rust-lang/rustfmt#7034 · 8 comments · 1 assignee · Opened Aug 18, 2026
[ICE]: `Request to format inverted span` Open

C-bug I-ICE needs-triage

rust-lang/rustfmt#7033 · 8 comments · 1 assignee · Opened Aug 18, 2026
Non-idempotency in consecutive block comment Open

A-comments C-bug I-non-idempotency

rust-lang/rustfmt#7019 · 1 comment · 1 assignee · Opened Aug 10, 2026
rustfmt gives up formatting of call chain if an inner string literal exceeds max width Open

A-call-chains A-strings C-bug I-max-width

Difficulty 3/5 1-2 days Newbie friendliness 68/100

rust-lang/rustfmt#7108 · 4 comments · Opened Aug 5, 2026
rustfmt gives up on code with moderate nesting, destructuring closure arg, and nested return type Open

A-call-chains I-poor-formatting I-poor-indentation

rust-lang/rustfmt#7012 · 1 comment · 1 assignee · Opened Aug 4, 2026
Alignment of horizontally-formatted enum struct variants Open

C-feature-request P-low S-on-hold

Difficulty 5/5 Over a week Newbie friendliness 48/100

rust-lang/rustfmt#6998 · 2 comments · Opened Jul 29, 2026
--file-lines range normalization can overflow at usize::MAX Open

C-bug P-low UO-file_lines

Difficulty 3/5 1-2 days Newbie friendliness 72/100

rust-lang/rustfmt#6992 · Opened Jul 28, 2026
Only succeeds in formatting if there is a comment Open

A-comments A-strings C-bug I-poor-formatting

Difficulty 3/5 1-2 days Newbie friendliness 65/100

rust-lang/rustfmt#6977 · Opened Jul 24, 2026
rustfmt should keep array types together when possible Open

C-bug I-poor-formatting

rust-lang/rustfmt#6976 · 5 comments · 1 assignee · Opened Jul 22, 2026
`--check` reports "Error writing files" for a module resolution error without writing source files Open

C-bug needs-triage

Difficulty 3/5 1-2 days Newbie friendliness 68/100

rust-lang/rustfmt#6971 · 1 reaction · Opened Jul 21, 2026
runs infinitely on https://github.com/rust-lang/rust/blob/main/tests/ui/parser/survive-peano-lesson-queue.rs Open

C-bug

Difficulty 3/5 1-2 days Newbie friendliness 65/100

rust-lang/rustfmt#6963 · Opened Jul 18, 2026
`rustfmt::skip` sometimes ignored when using `error_on_line_overflow` and `error_on_unformatted` Open

C-feature-request UO-error_on_line_overflow UO-error_on_unformatted

rust-lang/rustfmt#6954 · 11 comments · 1 assignee · Opened Jun 26, 2026
Wrongly positioned "+ Send + Sync + 'static" in complex bound. Open

A-trait-bounds A-whitespace C-bug I-vertical-alignment

Difficulty 3/5 1-2 days Newbie friendliness 57/100

rust-lang/rustfmt#6948 · 2 comments · Opened Jun 16, 2026
allow streaming formatting Open

C-feature-request P-low

rust-lang/rustfmt#6944 · 4 comments · 1 assignee · Opened Jun 14, 2026
[unstable option] doc_comment_code_block_small_heuristics Open

unstable-option UO-doc_comment_code_block_small_heuristics

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustfmt#6942 · 1 comment · Opened Jun 13, 2026
`cargo fmt` failure on Windows, too many command line args Open

A-cargo-fmt A-io C-bug O-windows

Difficulty 4/5 3-5 days Newbie friendliness 48/100

rust-lang/rustfmt#6934 · 25 comments · 1 reaction · Opened May 31, 2026
`eprintln!` warnings are not (easily) testable Open

A-diagnostics C-discussion

Difficulty 4/5 3-5 days Newbie friendliness 45/100

rust-lang/rustfmt#6933 · 1 reaction · Opened May 30, 2026
Discussion: enable Clippy lints in rustfmt source tree and CI Open

C-discussion

Difficulty 3/5 1-2 days Newbie friendliness 68/100

rust-lang/rustfmt#6923 · 17 comments · Opened May 22, 2026
Rendered width of \t in line width calculation isn't fixed to config.tab_spaces() Open

needs-triage

Difficulty 3/5 1-2 days Newbie friendliness 48/100

rust-lang/rustfmt#6904 · Opened May 22, 2026
Weird formatting of whitespace in between code and in-line comments Open

C-bug needs-triage

Difficulty 3/5 1-2 days Newbie friendliness 55/100

rust-lang/rustfmt#6896 · 1 comment · Opened May 13, 2026
file-lines can't partially format trait bounds lists Open

C-bug needs-triage UO-file_lines

Difficulty 4/5 3-5 days Newbie friendliness 55/100

rust-lang/rustfmt#6894 · 1 comment · Opened May 12, 2026
Misses some files but catching others in big workspace Open

C-bug needs-triage S-needs-repro

Difficulty 3/5 1-2 days Newbie friendliness 52/100

rust-lang/rustfmt#6887 · 2 comments · Opened May 8, 2026
file-lines can't format trait definition contents without formatting the header Open

C-bug UO-file_lines

Difficulty 4/5 3-5 days Newbie friendliness 64/100

rust-lang/rustfmt#6885 · Opened May 5, 2026
file-lines can't partially format where clauses Open

C-bug UO-file_lines

rust-lang/rustfmt#6872 · 1 comment · 1 assignee · Opened Apr 18, 2026
file-lines can't partially format function signatures Open

C-bug UO-file_lines

Difficulty 4/5 3-5 days Newbie friendliness 52/100

rust-lang/rustfmt#6868 · 3 comments · Opened Apr 17, 2026
file-lines modifies unselected fn signature lines when fn body is selected Open

C-bug S-has-mcve UO-file_lines

Difficulty 3/5 1-2 days Newbie friendliness 58/100

rust-lang/rustfmt#6864 · 3 comments · Opened Apr 15, 2026
How should group_imports handle visibility? Open

C-discussion T-style UO-group_imports

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-lang/rustfmt#6861 · 2 comments · Opened Apr 13, 2026

rust-lang/rustfmt

Get new issues in your inbox