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Type:
Bug
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Resolution: Invalid
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Priority:
Minor
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None
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Affects Version/s: None
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None
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1.21.4
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Yes
There is a small issue when an entity gets damaged because it is standing in a Fire-Block and gets teleported away during the EntiyDamageEvent.
net.minecraft.ReportedException: Ticking player at net.minecraft.server.level.ServerPlayer.doTick(ServerPlayer.java:1145) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.server.network.ServerGamePacketListenerImpl.tick(ServerGamePacketListenerImpl.java:356) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.network.Connection.tick(Connection.java:638) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.server.network.ServerConnectionListener.tick(ServerConnectionListener.java:248) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.server.MinecraftServer.tickConnection(MinecraftServer.java:1918) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.server.dedicated.DedicatedServer.tickConnection(DedicatedServer.java:453) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1891) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1665) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1330) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:340) ~[paper-1.21.3.jar:1.21.3-81-da71382] at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?] Caused by: java.util.ConcurrentModificationException at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1095) ~[?:?] at java.base/java.util.ArrayList$Itr.next(ArrayList.java:1049) ~[?:?] at net.minecraft.world.entity.Entity.checkInsideBlocks(Entity.java:1730) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.world.entity.Entity.applyEffectsFromBlocks(Entity.java:1355) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.world.entity.Entity.applyEffectsFromBlocks(Entity.java:1342) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.world.entity.LivingEntity.aiStep(LivingEntity.java:3659) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.world.entity.player.Player.aiStep(Player.java:598) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.world.entity.LivingEntity.tick(LivingEntity.java:3306) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.world.entity.player.Player.tick(Player.java:288) ~[paper-1.21.3.jar:1.21.3-81-da71382] at net.minecraft.server.level.ServerPlayer.doTick(ServerPlayer.java:1063) ~[paper-1.21.3.jar:1.21.3-81-da71382] ... 10 more
Code to reproduce:
@EventHandler public void onDmg(EntityDamageEvent event) { if(event.getCause() == DamageCause.FIRE) { event.getEntity().teleport(event.getEntity().getLocation().add(0,5,0)); } }