c := make(chan int, 10)
	r := make(chan int, 10)
	go func() {
		r <- cap(c)
	}()
	go func() {
		close(c)
		r <- 0
	}()
	<-r
	<-r
}

func TestRaceChanCloseSend(t *testing.T) {
	compl := make(chan bool, 1)
	c := make(chan int, 10)
	go func() {
		close(c)
		compl <- true
	}()
	c <- 0
	<-compl
}

func TestNoRaceChanMutex(t *testing.T) {