/usr/share/doc/libgtkmathview-dev/BUGS.gz is in libgtkmathview-dev 0.8.0-9ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgtkmathview-dev/../libgtkmathview0c2a/BUGS.gz
/usr/share/doc/libgtkmathview-dev/../libgtkmathview0c2a/BUGS.gz