by wyshunter:

Before filing a bug, please check whether it has been fixed since the
latest release. Search the issue tracker and check that you're running the
latest version of Go:

Run "go version" and compare against
http://golang.org/doc/devel/release.html  If a newer version of Go exists,
install it and retry what you did to reproduce the problem.

Thanks.

What steps will reproduce the problem?

[root@hostname net]# pwd
/usr/local/go/src/pkg/net

[root@hostname net]# go test net
--- FAIL: TestInterfaceArrivalAndDeparture (0.01 seconds)
    interface_unix_test.go:113: testInterface.setup failed: exit status 255
FAIL
FAIL    net 31.551s

What is the expected output?
ok      net some seconds

What do you see instead?

the same problem has been found in the previous issue and have been modified
                if err := ti.setBroadcast(5682 + i); err != nil {
                        t.Skipf("test requires external command: %v", err)
                }
                if err := ti.setup(); err != nil {
                        t.Fatalf("testInterface.setup failed: %v", err)
                } else {
                        time.Sleep(3 * time.Millisecond)
                }

I run it well as a normal user, but when I sudo to root and run it, it show the problem
again:

--- FAIL: TestInterfaceArrivalAndDeparture (0.01 seconds)
    interface_unix_test.go:113: testInterface.setup failed: exit status 255
FAIL

Which compiler are you using (5g, 6g, 8g, gccgo)?
6g

Which operating system are you using?
CST 2013 x86_64 x86_64 x86_64 GNU/Linux

Which version are you using?  (run 'go version')
go1.2rc5

Please provide any additional information below.