/usr/share/doc/libbobcat-dev/changelog.Debian.gz is in libbobcat-dev 3.19.01-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libbobcat-dev/../libbobcat3/changelog.Debian.gz
/usr/share/doc/libbobcat-dev/../libbobcat3/changelog.Debian.gz