by jonathan.r.hudson:

What steps will reproduce the problem?
1. Create a UDP socket
2. send a 0 byte datagram

var b [1]byte;
conn,err := net.DialUDP("udp", nil, raddr);
...
conn.Write(b[0:0]);
/*  conn.WriteToUDP(b[0:0],raddr); // This works */

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

It is expected that a 0 byte datagram is sent.
The 0 byte datagram is not sent. note: WriteToUDP works posixally correctly 
(in this case a 0 byte datagram is sent).

What is your $GOOS?  $GOARCH?

linux, amd64

Which revision are you sync'ed to?  (hg log -l 1)

changeset:   4150:cb559bd8a773
tag:         tip
user:        Robert Griesemer <gri@golang.org>
date:        Thu Nov 19 00:04:30 2009 -0800
summary:     bug219: parsing difficulties with 6g


Please provide any additional information below.