Serialization: Refine safety checks for extensions/protocols #68205
+24
−24
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In #65267 deserialization safety was made more conservative, allowing deserialization of any protocol and deserialization of any extension declaring an explicit conformance to any protocol. We can refine this to only allow deserialization of safe protocols and deserialization of extensions declaring conformances to safe protocols. Importantly, though, we must look up all conformances declared by the extension, not just the explicit ones.
Resolves rdar://114673761