Just tested the new "go generate" command. I'm using a windows machine and so my line endings are \r\n and not just \n.
so if I put "//go:generate dosomething" in my source code and run "go generate" it executed "dosomething\r" which can not be found. (Tested with go1.4.windows-amd64 release)
Sorry for submitting if this is expected behavior...