/usr/share/doc/libvaladoc-0.40-dev/changelog.Debian.gz is in libvaladoc-0.40-dev 0.40.4-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libvaladoc-0.40-dev/../libvala-0.40-0/changelog.Debian.gz