by azummo-google@towertech.it:

What steps will reproduce the problem?

func main()
{
        conn, _ := net.ListenPacket("udp", "0.0.0.0:1234");

        conn.SetReadTimeout(10000000e6);

        fmt.Printf("waiting.. %s\n", conn.LocalAddr().String());

        var buf [100]byte;

        for {
                n, _, err := conn.ReadFrom(&buf);

                if err == os.EAGAIN {
                        fmt.Printf("EAGAIN\n");
                        continue;
                }

                fmt.Printf("got %d bytes\n", n);
        }
}



What is the expected output? What do you see instead?

According to the doc, SetReadTimeout influences ReadFrom.
The default is zero, which means that the call must block.
Instead it immediately returns EAGAIN, regardless of SetReadTimeout.

This happens because the socket is always set up
in NONBLOCK mode.

What is your $GOOS?  $GOARCH?
linux/686

Which revision are you sync'ed to?  (hg log -l 1)
changeset:   4030:52ad1606d994
tag:         tip
user:        Rob Pike <r@golang.org>
date:        Fri Nov 13 13:15:18 2009 -0800
summary:     Explain why