/usr/share/go-1.8/src/path/filepath/ is in golang-1.8-src 1.8.3-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/go-1.8/src/path/filepath/example_unix_test.go
/usr/share/go-1.8/src/path/filepath/export_test.go
/usr/share/go-1.8/src/path/filepath/export_windows_test.go
/usr/share/go-1.8/src/path/filepath/match.go
/usr/share/go-1.8/src/path/filepath/match_test.go
/usr/share/go-1.8/src/path/filepath/path.go
/usr/share/go-1.8/src/path/filepath/path_plan9.go
/usr/share/go-1.8/src/path/filepath/path_test.go
/usr/share/go-1.8/src/path/filepath/path_unix.go
/usr/share/go-1.8/src/path/filepath/path_windows.go
/usr/share/go-1.8/src/path/filepath/path_windows_test.go
/usr/share/go-1.8/src/path/filepath/symlink.go
/usr/share/go-1.8/src/path/filepath/symlink_unix.go
/usr/share/go-1.8/src/path/filepath/symlink_windows.go