omochimetaru

@swift-6.1-dev -swift-version 6

func withValueImpl<R>( operation: () async throws -> R, isolation: isolated (any Actor)? ) async rethrows -> R { return try await operation() }

exit status: 1 with

<stdin>:5:20: error: non-sendable result type 'R' cannot be sent from nonisolated context in call to parameter 'operation' 1 | func withValueImpl<R>( | `- note: consider making generic parameter 'R' conform to the 'Sendable' protocol 2 | operation: () async throws -> R, 3 | isolation: isolated (any Actor)? 4 | ) async rethrows -> R { 5 | return try await operation() | `- error: non-sendable result type 'R' cannot be sent from nonisolated context in call to parameter 'operation' 6 | } 7 |