Fix pack conformance availability checking [5.9] #67938
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@swift-ci Please test |
hborla
approved these changes
Aug 15, 2023
tshortli
approved these changes
Aug 15, 2023
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Description: We forgot to walk into PackConformances when checking conformance availability, as a result you could reference an unavailable witness table pointer and get a crash at runtime.
Origination: Never worked.
Risk: Low, might cause the compiler to reject invalid code we used to accept.
Tested: New tests added.
Reviewed by: @tshortli