Comment # 6 on bug 103850 from Michel Dänzer

The valgrind output for Quern shows writes to freed memory, because the game
makes libX11 calls using a display handle that it had already closed. That's a
bug in the game (or maybe in a library it links statically), which could
explain the crash.

I don't see any obvious issue in the valgrind output for Unturned either
though.