解決死鎖，加goroutine or 重試

var wg sync.WaitGroup

func main() {   
    wg.Add(1)
    c := make(chan int)
    go readFromChannel(c, time.After(time.Duration(2)*time.Second))
    time.Sleep(time.Duration(5) * time.Second)
    c <- 10
    wg.Wait()
}

func readFromChannel(c chan int, ti <-chan time.Time) {
    select {
    case x := <-c:
        fmt.Println("Read", x)
    case <-ti:
        fmt.Println("TIMED OUT")
    }
    wg.Done()
}