Godoc does not work when installed via zypper, when invoked inside a go project
it exits with:
$ godoc -http=:6060
2019/03/05 15:06:23 godoc: corpus fstree is nil

I have tried searching what causes this problem and it looks like there was a
bug in godoc for go <= 1.10 where symlinks in GOROOT would confuse godoc and
break it (see: https://github.com/golang/go/issues/15049).

Unfortunately, installing godoc manually via go get does not seem to fix the
problem as (apparently) godoc must be included in the main go toolchain
(suggested here: https://github.com/golang/go/issues/23445).

My guess is that golang-org-x-tools must be updated to go 1.11 so that this
will start working again.