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Suggest valid command-line crate names#159544

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chenyukang:yukang-fix-159485-invalid-crate-name-suggestion
Jul 20, 2026
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Suggest valid command-line crate names#159544
rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
chenyukang:yukang-fix-159485-invalid-crate-name-suggestion

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@chenyukang

@chenyukang chenyukang commented Jul 19, 2026

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Fixes #159485

r? @estebank

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jul 19, 2026
Comment thread compiler/rustc_session/src/output.rs Outdated
@chenyukang
chenyukang force-pushed the yukang-fix-159485-invalid-crate-name-suggestion branch from ede8163 to be11af4 Compare July 19, 2026 08:33
Comment on lines +74 to +77
suggestion: span.is_none().then(|| InvalidCharacterInCrateNameSuggestion {
suggested_name:
crate_name.as_str().replace(|c: char| c != '_' && !c.is_alphanumeric(), "_"),
}),

@estebank estebank Jul 20, 2026

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I'm not sure if suggesting replacing something like an emoji with _ will be always the best idea, but can't think of better behavior other than replacing all invalid chars with underscore, not just - dashes.

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@estebank

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@bors r+

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rust-bors Bot commented Jul 20, 2026

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📌 Commit be11af4 has been approved by estebank

It is now in the queue for this repository.

@rust-bors rust-bors Bot added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jul 20, 2026
rust-bors Bot pushed a commit that referenced this pull request Jul 20, 2026
…uwer

Rollup of 18 pull requests

Successful merges:

 - #159600 (`rust-analyzer` subtree update)
 - #158046 (proc_macro: preserve file module spans for inner attrs)
 - #159000 (Small cleanups to the incr comp session code)
 - #159189 (Account for type alias projections in E0308 "expected/found" shortening logic)
 - #159449 (Enable single Location to issue multiple borrows)
 - #159544 (Suggest valid command-line crate names)
 - #159587 (Improve `AttrItem::span`)
 - #159594 (feat(rustc_hir_typeck): suggest `impl Fn` return for capturing closures)
 - #159597 (std: use `arc4random_buf` from libc)
 - #159599 (Resolver: Record at least 1 ambiguous trait if main decl is not a trait.)
 - #158061 (Make `pin!()` more foolproof.)
 - #159460 (Do not mark unnormalized const aliases as rigid when normalizing param env)
 - #159529 (Add regression test for nested replacement ranges in `collect_tokens`)
 - #159571 (Remove unused bundled library lookup for the local crate)
 - #159585 (Minor `TokenStream` improvements)
 - #159586 (Separate `InterpCx` usage by `ConstAnalysis` phases)
 - #159602 (Remove `ItemLike`)
 - #159603 (Clarify `push_stream`/`push_tree`)

Failed merges:

 - #159590 (Remove some dead code)
@rust-bors
rust-bors Bot merged commit 531ddf3 into rust-lang:main Jul 20, 2026
13 checks passed
@rustbot rustbot added this to the 1.99.0 milestone Jul 20, 2026
rust-timer added a commit that referenced this pull request Jul 20, 2026
Rollup merge of #159544 - chenyukang:yukang-fix-159485-invalid-crate-name-suggestion, r=estebank

Suggest valid command-line crate names

Fixes #159485

r? @estebank
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Invalid --crate-name should suggest a valid identifier

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