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Fix overflow in rustc happening if the err_count() is reduced in a stage. #87761

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Aug 6, 2021
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Fix overflow in rustc happening if the err_count() is reduced in a stage. #87761

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3 changes: 1 addition & 2 deletions compiler/rustc_session/src/session.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -450,8 +450,7 @@ impl Session {
{
let old_count = self.err_count();
let result = f();
let errors = self.err_count() - old_count;
if errors == 0 { Ok(result) } else { Err(ErrorReported) }
if self.err_count() == old_count { Ok(result) } else { Err(ErrorReported) }
}
pub fn span_warn<S: Into<MultiSpan>>(&self, sp: S, msg: &str) {
self.diagnostic().span_warn(sp, msg)
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