Comment 2 for bug 1647172

Hello Peter,

thank you for taking the time to report this. From a quick look at the back trace, the crash seems localized in LCMS (a "bt full" instead of a plain "bt" might be helpful). My guess is that this particular usage of LCMS via Poppler is not thread-safe but we are using Poppler concurrently as version 0.49 is advertised to be.

Of course, this implies the question on how to fix this. My guess is that we have to take this upstream to Poppler or even further up to LCMS. Poppler does contain a threading stress test [1] which does load links and should hence trigger the same issues as between threads 19653 and 19652 in your back trace. So if you are able to run that test and reproduce this issue on your system, we would probably get a simpler back trace and a solid case for a Poppler bug report and maybe even an idea how to fix this...

Best regards, Adam.

[1] https://cgit.freedesktop.org/poppler/poppler/tree/qt5/tests/stress-threads-qt5.cpp