/usr/share/doc/libglib2.0-0-dbg/changelog.Debian.gz is in libglib2.0-0-dbg 2.40.2-0ubuntu1.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libglib2.0-0-dbg/../libglib2.0-0/changelog.Debian.gz