Fix anvils bug - Fixes #3802

Spigot-Server-Patches/0535-Add-PrepareResultEvent.patch

@@ -107,21 +107,24 @@ index 270bf7f3e6ca15891419f1ce3e88d9aff094bee6..ce63c715e4920ad272e7c3dffb8f3279
  
      private void a(IInventory iinventory, ItemStack itemstack) {
 diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
-index 6c5036b23a41769167fd53b8cc5454e5e747598e..7a55bc4796317976e05eb53535eb420eed51e9c6 100644
+index 6c5036b23a41769167fd53b8cc5454e5e747598e..3e51d78b5b6b6b78381c36ca45a5166cd474df75 100644
 --- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
 +++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
-@@ -1548,12 +1548,30 @@ public class CraftEventFactory {
+@@ -1548,12 +1548,31 @@ public class CraftEventFactory {
          return event;
      }
  
 -    public static PrepareAnvilEvent callPrepareAnvilEvent(InventoryView view, ItemStack item) {
+-        PrepareAnvilEvent event = new PrepareAnvilEvent(view, CraftItemStack.asCraftMirror(item).clone());
+-        event.getView().getPlayer().getServer().getPluginManager().callEvent(event);
++    // Paper start - disable this method, handled below
 +    public static void callPrepareAnvilEvent(InventoryView view, ItemStack item) { // Paper - verify nothing uses return - handled below in PrepareResult
-+        if (true) return; // Paper - nothing
-         PrepareAnvilEvent event = new PrepareAnvilEvent(view, CraftItemStack.asCraftMirror(item).clone());
-         event.getView().getPlayer().getServer().getPluginManager().callEvent(event);
++        PrepareAnvilEvent event = new PrepareAnvilEvent(view, CraftItemStack.asCraftMirror(item)); // Paper - remove clone
++        //event.getView().getPlayer().getServer().getPluginManager().callEvent(event); // disable event
          event.getInventory().setItem(2, event.getResult());
 +        //return event; // Paper
 +    }
++    // Paper end
 +
 +    // Paper start - support specific overrides for prepare result
 +    public static com.destroystokyo.paper.event.inventory.PrepareResultEvent callPrepareResultEvent(InventoryView view, ItemStack item, int resultSlot) {