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sema: fix UAF in type mismatch error

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xdBronch 2025-11-16 22:01:36 -05:00 committed by Veikka Tuominen
parent 29a1d0c06f
commit d2b1aa48ab
1 changed files with 7 additions and 5 deletions
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12
src/Sema.zig
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@ -2643,11 +2643,13 @@ pub fn fail(
}
fn failWithTypeMismatch(sema: *Sema, block: *Block, src: LazySrcLoc, expected: Type, found: Type) CompileError {
const err_msg = try sema.typeMismatchErrMsg(src, expected, found);
errdefer err_msg.destroy(sema.gpa);
try addDeclaredHereNote(sema, err_msg, expected);
try addDeclaredHereNote(sema, err_msg, found);
return sema.failWithOwnedErrorMsg(block, err_msg);
return sema.failWithOwnedErrorMsg(block, msg: {
const msg = try sema.typeMismatchErrMsg(src, expected, found);
errdefer msg.destroy(sema.gpa);
try addDeclaredHereNote(sema, msg, expected);
try addDeclaredHereNote(sema, msg, found);
break :msg msg;
});
}
pub fn failWithOwnedErrorMsg(sema: *Sema, block: ?*Block, err_msg: *Zcu.ErrorMsg) error{ AnalysisFail, OutOfMemory } {