/usr/share/doc/libswt-glx-gtk-3-jni/changelog.Debian.gz is in libswt-glx-gtk-3-jni 3.8.2-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libswt-glx-gtk-3-jni/../libswt-gtk-3-jni/changelog.Debian.gz