os/signal: code example for Notify tries to catch os.Kill which doesn't work

[wolf0403]

In the code example for os/signal/#Notify,

signal.Notify(c, os.Interrupt, os.Kill)

tries to catch os.Kill signal, which doesn't work on Linux platforms.

Steps to reproduce:
Code is taken from the doc.

$ cat kill.go
package main

import (
        "fmt"
        "os"
        "os/signal"
)

func main() {
        c := make(chan os.Signal, 1)
        signal.Notify(c, os.Interrupt, os.Kill)
        s := <-c
        fmt.Println("Got signal ", s)
}

$ go build kill.go
$ ./kill &
[1] 10300
$ kill -KILL $!
$
[1]+  Killed                  ./kill

Ctrl-C / -s SIGINT works fine but SIGKILL is not caught.

[vapao]

SIGKILL 9 Kill(can't be caught or ignored) (POSIX), the SIGKILL like can't be caught.

[davecheney]

@wolf0403 @Yooke would either of you like to send a pull request to fix the example?

https://golang.org/doc/contribute.html

[gopherbot]

CL https://golang.org/cl/16467 mentions this issue.