Sema: Never record argument label mismatches for unlabeled trailing closures #82020
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AnthonyLatsis
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@swift-ci please smoke test macOS |
xedin
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Jun 5, 2025
…losures Fixes a crash on invalid. The previous logic was causing a label mismatch constraint fix to be recorded for an unlabeled trailing closure argument matching a variadic paramater after a late recovery argument claim in `matchCallArgumentsImpl`, because the recovery claiming skips arguments matching defaulted parameters, but not variadic ones. We may want to reconsider that last part, but currently it regresses the quality of some diagnostics, and this is a targeted fix. The previous behavior is fine because the diagnosis routine associate with the constraint fix (`diagnoseArgumentLabelError`) skips unlabeled trailing closures when tallying labeling issues — *unless* there are no other issues and the tally is zero, which we assert it is not. Fixes rdar://152313388.
AnthonyLatsis
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Heyyy, Hamish compiler crash fixed! |
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@swift-ci please smoke test |
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@swift-ci please test source compatibility |
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@swift-ci please smoke test Linux |
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Source compatibility failures not related, reproduce with main too. |
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Fixes a crash on invalid. The previous logic was causing a label mismatch constraint fix to be recorded for an unlabeled trailing closure argument matching a variadic paramater after a late recovery argument claim in
matchCallArgumentsImpl, because the recovery claiming skips arguments matching defaulted parameters, but not variadic ones. We may want to reconsider that last part, but currently it regresses the quality of some diagnostics, and this is a targeted fix.The previous behavior is fine because the diagnosis routine associate with the constraint fix (
diagnoseArgumentLabelError) skips unlabeled trailing closures when tallying labeling issues — unless there are no other issues and the tally is zero, which we assert it is not.Minimal crasher:
Fixes rdar://152313388.