/usr/share/doc/libdee-1.0-4-dbg/changelog.Debian.gz is in libdee-1.0-4-dbg 1.2.7+15.04.20150304-0ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libdee-1.0-4-dbg/../libdee-1.0-4/changelog.Debian.gz