net: golang 1.5 mac address on Windows has additional :00:00

[sathishvj]

I'd written a program in go 1.4 to retrieve mac addresses on windows and used to get the correct mac address.
With 1.5.1 however, I'm seeing a :00:00 appended to all the mac addresses on Windows (specifically Windows 7 Professional).

Is there a reason for this (or is it simply an error on my side)?

 ifs, _ := net.Interfaces()
 for _, v := range ifs {
     h := v.HardwareAddr.String()
     if len(h) == 0 {
         continue
     }
     si.Macs = append(si.Macs, h)
 }

Bjorn Graf in this thread reports: "on my Windows 10 Go 1.5,x (amd64 and 386) seems to find only the loopback pseudo-Interface with an all-00 mac while go1.4.2 lists the real interface."

[ianlancetaylor]

CC @mikioh @alexbrainman

[gopherbot]

CL https://golang.org/cl/14747 mentions this issue.

[gopherbot]

CL https://golang.org/cl/17412 mentions this issue.