Bug with enderman head

[blue-pinapple]

We get this error when people are at the enderman farm (Killing a lot at once)
This bug has exsisted for a while, I thought I should finally post it

[13:14:16] [Server thread/ERROR]: Could not pass event EntityTargetLivingEntityEvent to DropHeads v3.10.7
java.lang.ClassCastException: class org.bukkit.event.entity.EntityDamageEvent cannot be cast to class org.bukkit.event.entity.EntityDamageByEntityEvent (org.bukkit.event.entity.EntityDamageEvent and org.bukkit.event.entity.EntityDamageByEntityEvent are in unnamed module of loader java.net.URLClassLoader @3cd1f1c8)
	at DropHeads v3.10.6.1.jar/net.evmodder.DropHeads.listeners.EndermanProvokeListener.entityTargetEntityEvent(EndermanProvokeListener.java:52) ~[DropHeads v3.10.6.1.jar:?]
	at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[paper-api-1.21.10-R0.1-SNAPSHOT.jar:?]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:71) ~[paper-api-1.21.10-R0.1-SNAPSHOT.jar:?]
	at PerWorldPlugins-1.5.9.jar/dev.tonimatas.perworldplugins.api.PerWorldRegisteredListener.callEvent(PerWorldRegisteredListener.java:29) ~[PerWorldPlugins-1.5.9.jar:?]
	at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:131) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:628) ~[paper-api-1.21.10-R0.1-SNAPSHOT.jar:?]
	at org.bukkit.event.Event.callEvent(Event.java:46) ~[paper-api-1.21.10-R0.1-SNAPSHOT.jar:?]
	at net.minecraft.world.entity.Mob.setTarget(Mob.java:288) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.world.entity.monster.EnderMan.setTarget(EnderMan.java:132) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.world.entity.ai.goal.target.NearestAttackableTargetGoal.start(NearestAttackableTargetGoal.java:76) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.world.entity.monster.EnderMan$EndermanLookForPlayerGoal.tick(EnderMan.java:602) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.world.entity.ai.goal.WrappedGoal.tick(WrappedGoal.java:63) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.world.entity.ai.goal.GoalSelector.tickRunningGoals(GoalSelector.java:126) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.world.entity.ai.goal.GoalSelector.tick(GoalSelector.java:117) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.world.entity.Mob.serverAiStep(Mob.java:782) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.world.entity.LivingEntity.aiStep(LivingEntity.java:3529) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.world.entity.Mob.aiStep(Mob.java:526) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.world.entity.monster.Monster.aiStep(Monster.java:46) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.world.entity.monster.EnderMan.aiStep(EnderMan.java:258) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.world.entity.LivingEntity.tick(LivingEntity.java:3307) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.world.entity.Mob.tick(Mob.java:392) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.server.level.ServerLevel.tickNonPassenger(ServerLevel.java:1316) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.world.level.Level.guardEntityTick(Level.java:1434) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.server.level.ServerLevel.lambda$tick$4(ServerLevel.java:839) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.world.level.entity.EntityTickList.forEach(EntityTickList.java:39) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.server.level.ServerLevel.tick(ServerLevel.java:821) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1807) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1618) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.server.dedicated.DedicatedServer.tickServer(DedicatedServer.java:430) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1338) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:384) ~[paper-1.21.10.jar:1.21.10-113-9fc21bc]
	at java.base/java.lang.Thread.run(Thread.java:1570) ~[?:?]

[blue-pinapple]

I also get [13:25:00] [Server thread/ERROR]: Could not pass event EntityTargetLivingEntityEvent to DropHeads v3.10.7 java.lang.ClassCastException: null

Thanks for your work, this bug isn't actualy noticed by players and probably isn't high prority

[EvModder]

This one is really strange, because upon inspecting the code this error should be impossible, unless somehow the JVM is executing conditional expressions in a different order than what they are in the code, which should in theory be impossible.

However, just to be safe, I've extracted the line of code that the error is coming from into its own function with some simplified boolean logic, which will hopefully make it truly impossible to trigger, and if it still happens hopefully more clear for me to detect why.