Created attachment 14609 [details]
patch to fix the issue
fast_rgb_to_cmyk does this
if ((copy_spots || ss != ds) || (!da && sa))
it should probably do this instead
if ((copy_spots && ss != ds) || (!da && sa))
It's a bit strange to have this bug report here with a patch but without any report... In any case, I've got a bug report over at the fedora bz:
It comes with a PDF that makes mupdf segfault with
mupdf: source/fitz/colorspace.c:1399: fast_rgb_to_cmyk: Assertion `"This should never happen" == NULL' failed.
which is why I quote it here. This is with mupdf-1.12.0-5.fc27.x86_64 which is 1.12.0 plus several patches for CVEs.
Author: Tor Andersson <firstname.lastname@example.org>
Date: Tue Oct 16 15:43:17 2018 +0200
Fix asserts and checks in fast_xxx_to_yyy functions.
fast_rgb_to_cmyk had || instead of && so always triggered incorrectly.
Only throw, no need to both assert and throw.