Slava Pestov bee9fee58b RequirementMachine: Don't call ProtocolDecl::getSuperclass() in concrete contraction ...

This changes the minimized signature in a very narrow edge case.

If you have

    class C : P {}

and also

    protocol P : C {}
    protocol P where Self : C {}

then <T where T : P, T : C> now becomes <T : P> both with spellings;
before, the first one gave <T : P> and the second <T : C>.

2024-03-21 14:49:05 -04:00

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