panic("fail")
				}
				sleep()
			}
		}
		<-sync

		go i32sender(c32, sync)
		if buffer > 0 {
			<-sync
		}
		try = 0
	Recv32:
		for {
			select {
			case i32 = <-c32:
				break Recv32
			default:
				try++
				if try > maxTries {
					println("i32sender buffer=", buffer)
					panic("fail")
				}
				sleep()
			}
		}
		if i32 != 234 {