/usr/share/doc/libpopt-dev/changelog.Debian.gz is in libpopt-dev 1.16-11.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libpopt-dev/../libpopt0/changelog.Debian.gz
/usr/share/doc/libpopt-dev/../libpopt0/changelog.Debian.gz