/usr/share/doc/libstarpufft-1.1-1/changelog.Debian.gz is in libstarpufft-1.1-1 1.1.4+dfsg-3build2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libstarpufft-1.1-1/../libstarpu-1.1-9/changelog.Debian.gz