Paper/patches/server/0979-Only-erase-allay-memory-on-non-item-targets.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Bjarne Koll <lynxplay101@gmail.com>
Date: Fri, 4 Aug 2023 15:53:36 +0200
Subject: [PATCH] Only erase allay memory on non-item targets

Spigot incorrectly instanceOf checks the EntityTargetEvent#getTarget
against the internal ItemEntity type and removes the nearest wanted item
memory if said instanceOf check fails, (which is always the case)
causing allays to behave differently as they constantly loose their
target item.

This commit fixes the faulty behaviour by instance performing a check
against the CraftItem type.

diff --git a/src/main/java/net/minecraft/world/entity/ai/behavior/GoToWantedItem.java b/src/main/java/net/minecraft/world/entity/ai/behavior/GoToWantedItem.java
index bd9aa4a5443da862be3403c1941113373741a87c..2f92eb39cde7b30a894db347ca85a506d880411e 100644
--- a/src/main/java/net/minecraft/world/entity/ai/behavior/GoToWantedItem.java
+++ b/src/main/java/net/minecraft/world/entity/ai/behavior/GoToWantedItem.java
@@ -35,8 +35,9 @@ public class GoToWantedItem {
                             if (event.isCancelled()) {
                                 return false;
                             }
-                            if (!(event.getTarget() instanceof ItemEntity)) {
+                            if (!(event.getTarget() instanceof org.bukkit.craftbukkit.entity.CraftItem)) { // Paper - only erase allay memory on non-item targets
                                 memoryaccessor2.erase();
+                                return false; // Paper - only erase allay memory on non-item targets
                             }
 
                             entityitem = (ItemEntity) ((org.bukkit.craftbukkit.entity.CraftEntity) event.getTarget()).getHandle();