rust-lang / rust-lang/rust-analyzer
`hard_tabs` in `.rustfmt.toml` causes exponential indentation for doc comment newlines
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C-bug
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- Rust
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Description
rust-analyzer version: 0.3.2997-standalone [/home/purpzie/.vscode-server/extensions/rust-lang.rust-analyzer-0.3.2997-linux-x64/server/rust-analyzer]
rustc version: 1.97.1 (8bab26f4f 2026-07-14)
editor or extension: VSCode with extension version 0.3.2997
relevant settings: hard_tabs = true in .rustfmt.toml
code snippet to reproduce:
/// This is a doc comment that works because it has no intendation
struct Foo {
/// This a doc comment that breaks because it has some indentation
bar: u8,
}
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Research direction
No source file or test is named. Start by reproducing the shown Rust snippet in rust-analyzer with hard_tabs = true in .rustfmt.toml, then trace formatting of indented doc comments; done means nested doc-comment newlines no longer produce exponential indentation.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- devtools
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 65/100