Strange(?) build failures for golang package

[Mark E. Fuller]

I am trying to update go-task for some time now and consistently getting 
a build error/failure with no clear indication of what's happened:
https://download.copr.fedorainfracloud.org/results/fuller/test-builds/fedora...

Is it possible that there are build flags are default settings in the 
golang macros that might be leading to this?

Thanks,
fuller