}
	mu.Unlock()
	x = 2
	<-done
}

// We do not currently automatically
// parse this test. It is intended that the creation
// stack is observed manually not to contain
// off-by-one errors
func TestRaceAnnounceThreads(t *testing.T) {
	const N = 7
	allDone := make(chan bool, N)

	var x int
	_ = x

	var f, g, h func()
	f = func() {
		x = 1
		go g()
		go func() {
			x = 1
			allDone <- true
		}()