[cups] printer-state-message="Filter failed" ? is it cups, ghostscript, or other?

[Till Kamppeter]

This problem also got reported to Debian

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=926576

and to Arch Linux

https://bugs.archlinux.org/task/62251

and the report for Arch Linux helped me to solve the problem.

There they have found an alternative method for the Ghostscript call to 
determine the number of pages of a PDF file and also talked with the 
Ghostscript developers on IRC to confirm the need of the change.

The old call used the undocumented internal "pdfdict" of Ghostscript 
which from Ghostscript 9.27 on is not accessible any more for security 
reasons. Now I have changed foomatic-rip to use the call suggested in 
the Arch Linux bug report using "runpdfbegin".

See

https://github.com/OpenPrinting/cups-filters/commit/297cc2d

I have issued the new 1.22.5 release of cups-filters now which contains 
the fix.

    Till