/usr/share/doc/libpigment0.3-dev/changelog.Debian.gz is in libpigment0.3-dev 0.3.17-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libpigment0.3-dev/../libpigment0.3-11/changelog.Debian.gz