关于 go 无缓冲 channel 的 deadlock 问题！

package main

import ( "fmt" "net" )

var temp net.IP

func main() { fmt.Println("start......") ch := make(chan int) <-ch fmt.Println("hello world") }

/* start......

*/

package main

import ( "fmt" )

func main() { fmt.Println("start......") ch := make(chan int) <-ch fmt.Println("hello world") }

/* start...... fatal error: all goroutines are asleep - deadlock!

goroutine 1 [chan receive]: main.main() */