You can do this instead: https://play.golang.org/p/avMIyYlwxbF On Wed, Oct 24, 2018 at 11:05 AM Sathish VJ <sathis...@gmail.com> wrote: > > This is a program where the receiver is asking the sender to close after > receiving 1 value. Using default for the sending (line 34) causes the code > to deadlock while even a timeout of a nanosecond causes it to be ok. > I don't want to time the sending though. Is there a better option to > sequence this code? > Is using default not an option here at all? > > https://play.golang.org/p/30sI9RYJ1Ed > > package main > > import "fmt" > //import "time" > > var c = make(chan string) > var quit = make(chan bool) > > func main() { > go fn() > > for { > select { > case msg, ok := <-c: > if !ok { > c = nil > return > } else { > fmt.Println("received: ", msg) > quit <- true > } > } > } > } > > func fn() { > for { > select { > case <-quit: > fmt.Println("closin chan c") > close(c) > return > //case <-time.After(time.Nanosecond): // this is ok > default: // using default causes deadlock > c <- "Image" > } > } > } > > > > received: Image > fatal error: all goroutines are asleep - deadlock! > > goroutine 1 [chan send]: > main.main() > /tmp/sandbox497027958/main.go:20 +0x100 > > goroutine 5 [chan send]: > main.fn() > /tmp/sandbox497027958/main.go:35 +0x40 > created by main.main > /tmp/sandbox497027958/main.go:10 +0x40 > > > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout.
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