community/qt5-qtwebengine: instability/segfaults

Reproducible on all my hosts for last few months at least.

My use-case is qutebrowser.

Some sites work fine (in this case, crashes are random, be it a renderer process or browser entirely), but some are guaranteed to crash at least renderer process.

Crashes cause different messages in kernel log from time to time. Now it's as follows:

[ 4893.912806] ThreadPoolForeg[4934]: segfault at 8 ip 00007f10a43705ef sp 00007f109b764540 error 4 in libglib-2.0.so.0.7000.5[7f10a4333000+66000]
[ 4893.912822] Code: 55 00 48 89 d8 44 8d 6b 01 45 31 e4 48 c1 e0 04 49 c1 e5 04 48 01 c2 48 03 45 08 48 89 54 24 18 48 89 44 24 20 4e 8b 7c e4 18 <49> 8b 57 08 48 83 fa 03 76 0e 49 8b 37 8b 7c 24 0c e8 6b fd ff ff

I'm intrested in fixing that, but I lack advanced debugging skills and knowledge of chromium codebase. Let me know if I can help.