/usr/share/doc/libccp4c0-dbg/changelog.Debian.gz is in libccp4c0-dbg 6.4.5-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libccp4c0-dbg/../libccp4c0/changelog.Debian.gz
/usr/share/doc/libccp4c0-dbg/../libccp4c0/changelog.Debian.gz