Just FYI, qpdf finally cleared "NEW" and is now in debian experimental.
The version there is 7.0~b1-3. I did some packaging updates to, among
other things, remove use of cdbs in favor of straight dh. I will
probably release a b2 release soon. Someone's been exposing memory
errors using libfuzzer, and I'm getting to test clean with address
sanitizer. Once I've done that, I will probably release b2. I need a few
hours to be ready for a final 7.0.0. When do I need to do that so it can
be in Artful? I'd rather not have a beta version sitting around in a
Ubuntu release, even if it's not LTS. I will also put 7.0.0 in debian
unstable which will trigger a transition that will include cups-filters.
I'm not sure what your process is for updating cups-filters in debian.
Jay