Does not support leaf core

[ian171]

This is the original issue link: issue, Leaf is an optimized core for Paper. However it isn't compatible

[20:54:56 ERROR]: Could not pass event PrepareAnvilEvent to AnvilColorizer v1.0.3
java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0
at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:100) ~[?:?]
at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:106) ~[?:?]
at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:302) ~[?:?]
at java.base/java.util.Objects.checkIndex(Objects.java:365) ~[?:?]
at java.base/java.util.ArrayList.get(ArrayList.java:428) ~[?:?]
at AnvilColorizer.jar/com.puddingkc.AnvilColorizer.onPrepareAnvil(AnvilColorizer.java:30) ~[AnvilColorizer.jar:?]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:71) ~[leaf-api-1.21.8-R0.1-SNAPSHOT.jar:?]
at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:59) ~[leaf-1.21.8.jar:1.21.8-98-d36ed6c]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:131) ~[leaf-1.21.8.jar:1.21.8-98-d36ed6c]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:629) ~[leaf-api-1.21.8-R0.1-SNAPSHOT.jar:?]
at org.bukkit.event.Event.callEvent(Event.java:46) ~[leaf-api-1.21.8-R0.1-SNAPSHOT.jar:?]
at org.bukkit.craftbukkit.event.CraftEventFactory.callPrepareResultEvent(CraftEventFactory.java:1709) ~[leaf-1.21.8.jar:1.21.8-98-d36ed6c]
at net.minecraft.world.inventory.AnvilMenu.setItemName(AnvilMenu.java:407) ~[leaf-1.21.8.jar:1.21.8-98-d36ed6c]
at net.minecraft.server.network.ServerGamePacketListenerImpl.handleRenameItem(ServerGamePacketListenerImpl.java:1109) ~[leaf-1.21.8.jar:1.21.8-98-d36ed6c]
at net.minecraft.network.protocol.game.ServerboundRenameItemPacket.handle(ServerboundRenameItemPacket.java:33) ~[leaf-1.21.8.jar:1.21.8-98-d36ed6c]
at net.minecraft.network.protocol.game.ServerboundRenameItemPacket.handle(ServerboundRenameItemPacket.java:8) ~[leaf-1.21.8.jar:1.21.8-98-d36ed6c]

[PikaMug]

As far as I can tell, this has nothing to do with AnvilGUI, nor the AuthAnvilLogin plugin which your issue links to. The problem is with AnvilColorizer, specifically this line here. Tell the author that they must check first whether the anvil's result is populated.

I am unable to assist you further.

[GG-MD]

@ian171 Not a leaf bug.

[GG-MD]

also It is not a bug of anvilgui.