/usr/share/doc/libvala-0.14-dev/changelog.Debian.gz is in libvala-0.14-dev 0.14.2-2ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libvala-0.14-dev/../libvala-0.14-0/changelog.Debian.gz