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Do not underflow after resetting unmatched braces count

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Fix #58638.
This commit is contained in:
Esteban Küber 2019-02-22 11:17:30 -08:00
parent f47ec2ad5b
commit cc1cd83657
1 changed files with 8 additions and 4 deletions
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12
src/libsyntax/parse/parser.rs
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@ -1184,8 +1184,10 @@ impl<'a> Parser<'a> {
match ate { match ate {
Some(_) => { Some(_) => {
// See doc comment for `unmatched_angle_bracket_count`. // See doc comment for `unmatched_angle_bracket_count`.
self.unmatched_angle_bracket_count -= 1; if self.unmatched_angle_bracket_count > 0 {
debug!("expect_gt: (decrement) count={:?}", self.unmatched_angle_bracket_count); self.unmatched_angle_bracket_count -= 1;
debug!("expect_gt: (decrement) count={:?}", self.unmatched_angle_bracket_count);
}
Ok(()) Ok(())
}, },
@ -2248,8 +2250,10 @@ impl<'a> Parser<'a> {
// See doc comment for `unmatched_angle_bracket_count`. // See doc comment for `unmatched_angle_bracket_count`.
self.expect(&token::Gt)?; self.expect(&token::Gt)?;
self.unmatched_angle_bracket_count -= 1; if self.unmatched_angle_bracket_count > 0 {
debug!("parse_qpath: (decrement) count={:?}", self.unmatched_angle_bracket_count); self.unmatched_angle_bracket_count -= 1;
debug!("parse_qpath: (decrement) count={:?}", self.unmatched_angle_bracket_count);
}
self.expect(&token::ModSep)?; self.expect(&token::ModSep)?;