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koher
@swift-5.6.3 protocol P {} extension Never: P {} func makeP() -> some P { return fatalError() }
swift56 BOT 5/30/2022 12:52 PM
stderr:<stdin>:4:5: warning: will never be executed return fatalError() ^ <stdin>:4:12: note: a call to a never-returning function return fatalError() ^