/usr/share/gocode/src/launchpad.net/gocheck is in golang-gopkg-check.v1-dev 0.0+git20161208.0.20d25e2-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/gocode/src/launchpad.net/../gopkg.in/check.v1