SILGen: Add missing FormalEvaluationScope when evaluating consumed noncopyable switch subjects. #84190
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…ncopyable switch subjects. After swiftlang#83959, we expect noncopyable OpenExistential evaluations to have an outer FormalEvaluationScope to forward to. However, there was no such FormalEvaluationScope while emitting a consuming switch subject, causing an assertion failure to trip. Add a FormalEvaluationScope tightly scoped around the evaluation in this case, fixing rdar://160080337.
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@swift-ci Please test |
DougGregor
approved these changes
Sep 9, 2025
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After #83959, we expect noncopyable OpenExistential evaluations to have an outer FormalEvaluationScope to forward to. However, there was no such FormalEvaluationScope while emitting a consuming switch subject, causing an assertion failure to trip. Add a FormalEvaluationScope tightly scoped around the evaluation in this case, fixing rdar://160080337.