}
			if oe, ok := err.(*OpError); !ok || oe.Err != errCanceled {
				t.Fatalf("dial error = %v (%T); want OpError with Err == errCanceled", err, err)
			}
			return // success.
		}
	}
}

func TestCancelAfterDial(t *testing.T) {
	if testing.Short() {
		t.Skip("avoiding time.Sleep")
	}

	ln := newLocalListener(t, "tcp")

	var wg sync.WaitGroup
	wg.Add(1)
	defer func() {
		ln.Close()
		wg.Wait()