## code
package main

import "fmt"
import "time"

func main() {
  go rock()
  time.Sleep(123123)
}

func rock() {
  fmt.Printf("rock")
}
func roll() {
  fmt.Printf("roll")
}

## err
$ make
8g forever.go
forever.go:8: syntax error near time
make: *** [forever.8] Error 1