/usr/share/gocode/src/gopkg.in/inf.v0 is in golang-speter-go-exp-math-dec-inf-dev 0.0~git20140417.0.42ca6cd-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/gocode/src/gopkg.in/../speter.net/go/exp/math/dec/inf