}
			if x == 3 {
				break
			}
			c.L.Unlock()
			runtime.Gosched()
			c.L.Lock()
		}
		c.L.Unlock()
		done <- true
	}()
	<-done
	<-done
	<-done
}

func TestCondSignalStealing(t *testing.T) {
	for iters := 0; iters < 1000; iters++ {
		var m Mutex
		cond := NewCond(&m)

		// Start a waiter.
		ch := make(chan struct{})
		go func() {
			m.Lock()
			ch <- struct{}{}