/usr/share/doc/liboil0.3-dev/changelog.Debian.gz is in liboil0.3-dev 0.3.17-2ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/liboil0.3-dev/../liboil0.3/changelog.Debian.gz
/usr/share/doc/liboil0.3-dev/../liboil0.3/changelog.Debian.gz