Tested with GZDoom 4.4.1 x64.
The title may be misleading due to character limit. The array is a class array.
Can be reproduced like this:
1. Get Bullet-Eye
(that's where I discovered it; guaranteed to crash)
2. Open the mod and navigate to ZActors/Weapons/BEWeaponBase.zsc, Line 345. Where it says
change that to
then start a new game, type "summon newweaponcapsule", and shoot it. It will immediately crash to desktop.
I could try to cook up a smaller example if deemed necessary.