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Type: Bug
Resolution: Fixed
Priority: Minor
Fix Version/s: None
Affects Version/s: None
Labels:
None

Version:
4378-Spigot-e65d67a-8ef9079 (MC: 1.21.3)
Guidelines Read:
Yes

When teleporting a player to another dimension, the teleport fails, and the player attributes get extremely broken. Player won't be able to chat or load new chunks.

I made a test plugin that tries to teleport you to the nether ceiling when you interact with anything. To see the issue, load the plugin, and interact with the air. You won't be teleported, and you won't be able to chat either.

Notable part of the exception is:
Caused by: java.lang.IllegalArgumentException: Modifier is already applied on this attribute!

Full Exception:

[22:28:36 ERROR]: Could not pass event PlayerInteractEvent to TestPlugin v1.0
org.bukkit.event.EventException: null
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot-api-1.21.3-R0.1-SNAPSHOT.jar:?]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[spigot-api-1.21.3-R0.1-SNAPSHOT.jar:?]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:601) ~[spigot-api-1.21.3-R0.1-SNAPSHOT.jar:?]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:588) ~[spigot-api-1.21.3-R0.1-SNAPSHOT.jar:?]
	at org.bukkit.craftbukkit.v1_21_R2.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:579) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at org.bukkit.craftbukkit.v1_21_R2.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:541) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at org.bukkit.craftbukkit.v1_21_R2.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:537) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.server.network.PlayerConnection.a(PlayerConnection.java:1666) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.network.protocol.game.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:47) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.network.protocol.game.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:10) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.network.protocol.PlayerConnectionUtils.lambda$ensureRunningOnSameThread$0(PlayerConnectionUtils.java:35) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.server.TickTask.run(SourceFile:18) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.util.thread.IAsyncTaskHandler.d(SourceFile:164) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.util.thread.IAsyncTaskHandlerReentrant.d(SourceFile:23) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1319) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:210) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.util.thread.IAsyncTaskHandler.B(SourceFile:138) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.server.MinecraftServer.bv(MinecraftServer.java:1298) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.server.MinecraftServer.B(MinecraftServer.java:1291) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.util.thread.IAsyncTaskHandler.b(SourceFile:147) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1248) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.server.MinecraftServer.x_(MinecraftServer.java:1258) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.server.MinecraftServer.y(MinecraftServer.java:1101) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:329) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at java.base/java.lang.Thread.run(Thread.java:1583) [?:?]
Caused by: java.lang.IllegalArgumentException: Modifier is already applied on this attribute!
	at net.minecraft.world.entity.ai.attributes.AttributeModifiable.f(SourceFile:81) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.world.entity.ai.attributes.AttributeModifiable.d(SourceFile:107) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.world.entity.ai.attributes.AttributeModifiable.a(SourceFile:113) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.world.entity.ai.attributes.AttributeMapBase.b(SourceFile:124) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap$1.forEach(Object2ObjectOpenHashMap.java:1188) ~[fastutil-8.5.12.jar:?]
	at net.minecraft.world.entity.ai.attributes.AttributeMapBase.c(SourceFile:121) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.server.level.EntityPlayer.a(EntityPlayer.java:2089) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at net.minecraft.server.players.PlayerList.respawn(PlayerList.java:664) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at org.bukkit.craftbukkit.v1_21_R2.entity.CraftPlayer.teleport(CraftPlayer.java:1100) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at org.bukkit.craftbukkit.v1_21_R2.entity.CraftEntity.teleport(CraftEntity.java:191) ~[spigot-1.21.3-R0.1-SNAPSHOT.jar:4378-Spigot-e65d67a-8ef9079]
	at us.starcatcher.TestPlugin.TestPlugin$EventListener.onPlayerInteract(TestPlugin.java:20) ~[?:?]
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) ~[?:?]
	at java.base/java.lang.reflect.Method.invoke(Method.java:580) ~[?:?]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-api-1.21.3-R0.1-SNAPSHOT.jar:?]
	... 24 more

Plugin to reproduce:

public class TestPlugin extends JavaPlugin implements Listener
{
	private class EventListener implements Listener
	{
		@EventHandler
		public void onPlayerInteract(PlayerInteractEvent event) {
			var player = event.getPlayer();
			Location loc = new Location(getServer().getWorld("world_nether"), 0, 128, 0);
			player.teleport(loc);
		}
	}

	public void onEnable()
	{
		getServer().getPluginManager().registerEvents(new EventListener(), this);
	}
}

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