New task-creation APIs

Using Swift
6

I just tried the same API with TaskGroup instead of Task:

func newSend(
    operation: sending @escaping @isolated(any) () async -> Void
) async {
    await withTaskGroup(of: Void.self) { taskGroup in
        taskGroup.addTask { // error: Task-isolated value of type '() async -> Void' passed as a strongly transferred parameter; later accesses could race
            await operation()
        }
    }
}

func oldSend(
    operation: @escaping @Sendable () async -> Void
) async {
    await withTaskGroup(of: Void.self) { taskGroup in
        taskGroup.addTask {
            await operation()
        }
    }
}

This does not work, somehow.

This compiler message was mentioned here Feedback wanted: confusing concurrency diagnostic messages - #12 by twof as being unclear, but it does not seem to be clearer by now...