致命错误所有 goroutine 都处于休眠状态，死锁

Question

你能解释一下下面的错误吗：fatal error:

true

true

all goroutines are sleep - deadlock！

package main

import (

    "fmt"

)

func printer(ch chan bool) {

    ch <- true

}

func main() {

    var c chan bool = make(chan bool, 2)

    for i := 0; i < 5; i++ {

        go printer(c)

    }

    for i := range c {

        fmt.Println(i)

    }

}

Answer 1

因为通道c没有关闭，所以范围循环不会退出。此代码不会阻塞：func main() {&nbsp; var c chan bool = make(chan bool, 2)&nbsp; for i := 0; i < 5; i++ {&nbsp; &nbsp; go printer(c)&nbsp; }&nbsp; for i := 0; i < 5; i++ {&nbsp; &nbsp; fmt.Println(<-c)&nbsp; }}playground example