/usr/share/doc/libgmpada-dbg/changelog.Debian.gz is in libgmpada-dbg 0.0.20131223-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgmpada-dbg/../libgmpada2/changelog.Debian.gz
/usr/share/doc/libgmpada-dbg/../libgmpada2/changelog.Debian.gz