Control: severity -1 important Control: reassign -1 libfontconfig1 2.12.6-0.1 Control: affects -1 evince Control: forcemerge 882590 -1
Crash appears to have happened while fontconfig was parsing a config file. If you have a customized fontconfig configuration it's possibly triggering a bug in fontconfig. Though memory corruption bugs are tricky and can cause crashes in unrelated parts of the program. I'm reassigning/merging this to fontconfig because your description looks a lot like https://bugs.debian.org/882590. According to some of the comments in that bug, you could try downgrading libfontconfig1 or removing your ~/.fonts.conf. Keep a copy of your .fonts.conf though in case it's useful for debugging.
