/usr/share/doc/libbenchmark-dev/changelog.Debian.gz is in libbenchmark-dev 1.3.0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libbenchmark-dev/../libbenchmark1/changelog.Debian.gz
/usr/share/doc/libbenchmark-dev/../libbenchmark1/changelog.Debian.gz