Sema: Handle Error self-conformance in TypeChecker::containsProtocol() #36918
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While ModuleDecl::lookupConformance() did the right thing here, we have another entry point, TypeChecker::containsProtocol(), that also needs to special-case Error. Fixes https://bugs.swift.org/browse/SR-13734 / rdar://problem/70338670.
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While ModuleDecl::lookupConformance() did the right thing here, we have
another entry point, TypeChecker::containsProtocol(), that also needs
to special-case Error.
Fixes https://bugs.swift.org/browse/SR-13734 / rdar://problem/70338670.