[CSGen] Add a null check to prevent using invalid superclass type #33083
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While generating constraints for `SuperRefExpr` generator has to figure out a type of superclass associated with a current reference. Doing so might produce an empty type (aka `Type()`) when resolution fails, so `getSuperType` needs to check whether type is valid before attempting to wrap it into `MetatypeType`. Resolves: rdar://problem/50819554
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@swift-ci please smoke test |
hborla
approved these changes
Jul 23, 2020
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While generating constraints for
SuperRefExprgenerator has to figure outa type of superclass associated with a current reference. Doing so might
produce an empty type (aka
Type()) when resolution fails, sogetSuperTypeneeds to check whether type is valid before attempting to wrap it into
MetatypeType.Resolves: rdar://problem/50819554