rustc_lint: Allow scoped non_ascii_idents lint levels#157497
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`non_ascii_idents` was marked `crate_level_only`, and its diagnostic was emitted from the crate-wide symbol gallery. Move the lint into the scoped early lint visitor, checking both AST idents and macro token streams. Keep the one-diagnostic-per-ident behavior by deduplicating by ident and effective lint level/expectation, and leave the other Unicode security lints crate-level-only.
This was referenced Jun 5, 2026
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Jun 5, 2026
| fn check_ident_token(&mut self, cx: &EarlyContext<'_>, ident: Ident) { | ||
| let symbol = ident.name; | ||
| let symbol_str = symbol.as_str(); | ||
| if symbol_str.is_ascii() || symbol_str.starts_with('\'') { |
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Is there a reason we're ignoring lifetime names here? I would have assumed that lifetimes should also be handled by this lint (although a quick check of the current logic it does seem like we don't?)
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I'd be happy to include lifetime names here too if you think that's appropriate.
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Doing so might cause us to have to delay landing this PR (as we'll have to run crater to make sure we don't suddenly regress a lot of crates). Would you mind doing that as a follow up though?
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non_ascii_identswas markedcrate_level_only, and its diagnostic was emitted from the crate-wide symbol gallery.Move the lint into the scoped early lint visitor, checking both AST idents and macro token streams. Keep the one-diagnostic-per-ident behavior by deduplicating by ident and effective lint level/expectation, and leave the other Unicode security lints crate-level-only.
Fixes #151025
r? @jswrenn