ZDoom

It's because you're missing the return value. This is a currently known bug with the ZScript parser where for some reason functions that expect a return that don't have one simply crash instead of throwing an error. The likely cause is a missing null check

Yet another bug with the file system, I can't fix this one because I am not familiar with what Graf was doing with the new system or how it works.

In the future it really does help if you post minimal examples that can be easily run without requiring assembly - that is infinitely more useful than just posting code snippets, and even the crash logs themselves as well.

override bool Morph(Actor activator, class<PlayerPawn> playerclass, class<MorphedMonster> monsterclass, int duration, int style, class<Actor> morphflash, class<Actor>unmorphflash){
		
	super.Morph(activator, playerclass, monsterclass, duration, style, morphflash, unmorphflash);
}

For some reason, adding this code to my DoomPlayer caused it to crash.

[url]https://1drv.ms/u/c/f562b31d53640a9e/EfSwPBy1wUpBgxf0NDa-NnoBxIYi3qvR3IfM2bWMvXA46A?e=HffrDg[/url]

[code]override bool Morph(Actor activator, class<PlayerPawn> playerclass, class<MorphedMonster> monsterclass, int duration, int style, class<Actor> morphflash, class<Actor>unmorphflash){

super.Morph(activator, playerclass, monsterclass, duration, style, morphflash, unmorphflash);
}
[/code]