Task cancel invalid

[songhuaixu]

   @Test
    func cancel() async throws {
        let semaphore = Semaphore()
        let task = Task(on: systemUnderTest) {
            while !Task.isCancelled {
                print(Task.isCancelled)
            }
            await semaphore.signal()
        }
        Task {
            try await Task.sleep(nanoseconds: 1_000_000_000)
            task.cancel()
        }
        await semaphore.wait()
    }

[dfed]

Oh that's no good. Thank you for letting me know! Fixing now.