swift

4fe2a21a - AST: Only apply MemberImportVisibility to lookups from the main module.

AST: Only apply MemberImportVisibility to lookups from the main module. MemberImportVisibility rules should only apply to source code in the main module. The rules were being applied when resolving witnesses for synthesized Hashable conformances on CF types imported by ClangImporter, which caused the lookups to fail and bad conformances to be generated. Resolves https://github.com/swiftlang/swift/issues/78870 and rdar://142433039.