Fired a thunder ball at a creeper on fire.

Minecraft version: 1.20.
TooManyOrigins: 1.1.1+1.20.1 (Fabric)

Callstack: 1.20.1 crash report.txt

This likely happened because the creeper died.

Anyways, I have since fixed this by making the condition relating to attackers check if the attacker exists.

Thanks, I'll fix this later.