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There is a logical issue around what counts as leading white-space. There is code which does a subtraction assuming that no errors will be reported inside the leading whitespace. However we compute the length of that whitespace with std::char::is_whitespace and not rustc_lexer::is_whitespace. The former will include a no-break space while later will excluded it. We can only safely make the assumption that no errors will be reported in whitespace if it is all "Rust Standard" whitespace. Indeed an error does occur in unicode whitespace if it contains a no-break space.
12 lines
523 B
Rust
12 lines
523 B
Rust
// Invalid whitespace (not listed here: https://doc.rust-lang.org/reference/whitespace.html
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// e.g. \u{a0}) before any other syntax on the line should not cause any integer overflow
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// in the emitter, even when the terminal width causes the line to be truncated.
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//
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// issue #132918
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//@ check-fail
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//@ needs-rustc-debug-assertions
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//@ compile-flags: --diagnostic-width=1
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fn main() { return; }
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//~^ ERROR unknown start of token: \u{a0}
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