/usr/share/doc/gir1.2-bamf-3/changelog.Debian.gz is in gir1.2-bamf-3 0.5.3+18.04.20180207.2-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/gir1.2-bamf-3/../libbamf3-2/changelog.Debian.gz