https://bugs.freedesktop.org/show_bug.cgi?id=80419
--- Comment #111 from Nicolai Hähnle nhaehnle@gmail.com --- The apitrace-related crash from those earlier comments is not an XCOM bug. However, if I recall correctly, XCOM issues DrawRangeElements calls with ranges that are larger than necessary. This hurts performance slightly when vertex data is not in VBOs; it is irrelevant when all vertex data is in VBOs.
I have been able to reproduce the lockup (thanks to Edwin), but it takes a fairly long time inside the game to happen for me. With everything else that is going on, I simple haven't yet had the time to collect enough information to really understand what's going on.