[6.2] AST: More robust TypeBase::getSuperclassForDecl() #82131
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This can return ErrorType if the AST is invalid. A handful of callers handle the ErrorType result, but most don't, blindly assuming the result is always a nominal type. This resulted in a crash in at least one test case. Lift the burden from callers by always returning a nominal type here.
slavapestov
changed the title
bnbarham
approved these changes
Jun 10, 2025
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@swift-ci Please test |
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6.2 cherry-pick of part of #82115.
Description: Fix a possible crash when a superclass requirement involves an invalid class declaration. A utility method would return ErrorType, which wasn't handled correctly by all callers. Change the utility method to always return a nominal type instead.
Risk: Low.
Tested: New test case added.
Reviewed by: @xedin