go_handle_panic.go

package main

import (
	"log"
	"time"
)

func main() {
	ch := make(chan string, 10)
	done := make(chan struct{})

	go func() {
		for {
			select {
			case m, ok := <-ch:
				if !ok {
					log.Println("channel is closed")
					log.Println()
					return
				}
				log.Println("received:", m)
				log.Println()
			}
		}
	}()

	go func() {
		defer func() {
			x := recover()
			if x != nil {
				log.Println(x)
			}
			done <- struct{}{}
		}()
		time.Sleep(1 * time.Second)
		log.Println("sending hello...")
		ch <- "hello"
		time.Sleep(1 * time.Second)
		log.Println("sending world!...")
		ch <- "world!"
		time.Sleep(1 * time.Second)
		log.Println("closing the channel...")
		close(ch)
		time.Sleep(1 * time.Second)
		log.Println("sending 1...")
		ch <- "1"
		time.Sleep(1 * time.Second)
		done <- struct{}{}
	}()

	<-done
}