/usr/share/doc/qt4-designer/changelog.Debian.gz is in qt4-designer 4:4.8.7+dfsg-5ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/qt4-designer/../libqtcore4/changelog.Debian.gz
/usr/share/doc/qt4-designer/../libqtcore4/changelog.Debian.gz