There is still an issue when multiple keys are pressed at the same time. At some point, the 'event' in 'GHOST_EventPrinter::processEvent' is NULL:
```
Thread 1 "blender" received signal SIGSEGV, Segmentation fault.
0x00000000059eb5d5 in GHOST_EventPrinter::processEvent (this=0x602000002c90,
event=0xbebebebebebebebe)
at /home/christian/Development/blender/intern/ghost/intern/GHOST_EventPrinter.cpp:39
39 if (event->getType() == GHOST_kEventWindowUpdate)
```