/usr/ is in golang-github-evanphx-json-patch-dev 0.0~git20150402.0.766277e-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gocode/src/github.com/evanphx/
/usr/share/
/usr/share/gocode/
/usr/share/gocode/src/
/usr/share/gocode/src/github.com/
/usr/share/gocode/src/github.com/evanphx/json-patch/
/usr/share/gocode/src/github.com/evanphx/json-patch/patch_test.go
/usr/share/gocode/src/github.com/evanphx/json-patch/patch.go
/usr/share/gocode/src/github.com/evanphx/json-patch/merge_test.go
/usr/share/gocode/src/github.com/evanphx/json-patch/merge.go
/usr/share/doc/
/usr/share/doc/golang-github-evanphx-json-patch-dev/
/usr/share/doc/golang-github-evanphx-json-patch-dev/copyright
/usr/share/doc/golang-github-evanphx-json-patch-dev/README.md
/usr/share/doc/golang-github-evanphx-json-patch-dev/changelog.Debian.gz