/usr/share/doc/libqxt-designer0/changelog.Debian.gz is in libqxt-designer0 0.6.2-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libqxt-designer0/../libqxt-core0/changelog.Debian.gz
/usr/share/doc/libqxt-designer0/../libqxt-core0/changelog.Debian.gz