go - Why doesn't this Golang code to select among multiple time.After channels work? -

why doesn't golang code select among multiple time.after channels work?

see code below. 'timeout' message never issued. why?

package main  import (     "fmt"     "time" )  func main() {     count := 0     {         select {         case <-time.after(1 * time.second):             count++             fmt.printf("tick %d\n", count)             if count >= 5 {                 fmt.printf("ugh\n")                 return             }         case <-time.after(3 * time.second):             fmt.printf("timeout\n")             return         }     } } 

run on playground: http://play.golang.org/p/1gku-cwvah

output:

tick 1 tick 2 tick 3 tick 4 tick 5 ugh 

because time.after function, on every iteration returns new channel. if want channel same iterations, should save before loop:

timeout := time.after(3 * time.second) {     select {     //...     case <-timeout:         fmt.printf("timeout\n")         return     } } 

playground: http://play.golang.org/p/muwlgtxpnf.