codegen improperly deletes files in .git directory?

[ebauman]

howdy folks,

built a project using wrangler very similar to github.com/rancher/wrangler-sample
i have a custom api, a controller, a codegen and clean func, etc.

when I run go generate I receive

FATA[0014] go modules copy failed: open ./.git/objects/04/f4b9bf3bd3e5a0229df44bc18d19d15ac0ac97: permission denied 

this somehow eliminates the content of all files in my .git directory (top level only).
the files themselves still exist but 0B empty

[ebauman]

wrangler bug having to do with the existence of GOPATH it seems