by csanady:

What steps will reproduce the problem?
1. Use IPv6 DNS servers exclusively in /etc/resolv.conf.
2. make all

What is the expected output? None.
What do you see instead?

First of all: 

--- FAIL: http.TestClient
    Get http://www.google.com/robots.txt: dial tcp www.google.com:http: dial udp 
2001:db8::1:53: too many colons in address 2001:db8::1:53
--- FAIL: http.TestRedirect
    Get http://codesearch.google.com/: dial tcp codesearch.google.com:http: dial udp 
2001:db8::1:53: too many colons in address 2001:db8::1:53
FAIL

net.Dial() requires []'s around IPv6 addresses.  After that is corrected:

--- FAIL: net.TestDialGoogle
    -- 74.125.19.99:80 --
    -- www.google.com:80 --
    Dial("tcp4", "", "www.google.com:80") = _, dial tcp4 www.google.com:80: dial udp 
[2001:db8::1]:53: address family not supported by protocol family
    -- 74.125.19.99:http --
    -- www.google.com:http --
    Dial("tcp4", "", "www.google.com:http") = _, dial tcp4 www.google.com:http: dial udp 
[2001:db8::1]:53: address family not supported by protocol family
    -- 074.125.019.099:0080 --
    -- [::ffff:74.125.19.99]:80 --
    -- [::ffff:4a7d:1363]:80 --
    -- [0:0:0:0:0000:ffff:74.125.19.99]:80 --
    -- [0:0:0:0:000000:ffff:74.125.19.99]:80 --
    -- [0:0:0:0:0:ffff::74.125.19.99]:80 --
FAIL

The net test disables IPv6 sockets, and the names can't be resolved.


What is your $GOOS?  $GOARCH? darwin/amd64


Which revision are you using?  release.2010-01-13


Please provide any additional information below.

The attached diff solves the above problems, though the preferIPv4 testing in
dialgoogle_test.go 
could be improved.  Also, while it not automatically tested without the -ipv6 flag, the
address for 
ipv6.google.com appears to be out of date.

Attachments:

1. go.diff (1477 bytes)