Comment 6 for bug 1432497

When using the go tool provided with gccgo in gcc 5.0, the use of 'go get' doesn't always find and build the dependent packages correctly.

Here is an example:

go get -u github.com/mitchellh/gox

There is a dependent package github.com/mitchellh/iochan but that never gets downloaded or built and as a result neither does github.com/mitchellh/gox. I can make it work by downloading them in separate steps this way:

go get -u github.com/mitchellh/uchan
go get -u github.com/mitchellh/gox

After further debugging I found the problem has to do with the code in libgo/go/cmd/go/pkg.go in the load function where it does this check:

....

  p1 := loadImport(path, p.Dir, stk, p.build.ImportPos[path])
  if !reqPkgSrc && p1.Root == "" {
    continue
  }

....

When it tries to load the github.com/mitchellh/uchan package, p1.Root == "" so it skips the rest of the code in the loop that loads the package. Isn't this a case where p1.Root should have a non-null string and therefore not continue/skip the rest of the body of the loop and get it loaded?