<stdin>:2:11: warning: 'is' test is always true <stdin>:2:11: error: marker protocol 'Sendable' cannot be used in a conditional cast ↑２行で矛盾してて凄いな<stdin>:2:11: warning: 'is' test is always true <stdin>:2:11: error: marker protocol 'Sendable' cannot be used in a conditional cast ↑２行で矛盾してて凄いなprotocol P { } struct S<T> {} extension S: P where T: Sendable {} func main(_ a: Any) { if let p = a as? any P { print(1) } else { print(2) } } main((1, 2))