1 files changed, 49 insertions, 0 deletions
diff --git a/patches/server/1056-Item-Mutation-Fixes.patch b/patches/server/1056-Item-Mutation-Fixes.patch
new file mode 100644
index 0000000000..4fc0800e22
--- /dev/null
+++ b/patches/server/1056-Item-Mutation-Fixes.patch
@@ -0,0 +1,49 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Owen1212055 <[email protected]>
+Date: Wed, 20 Mar 2024 20:41:35 -0400
+Subject: [PATCH] Item Mutation Fixes
+
+
+diff --git a/src/main/java/net/minecraft/world/inventory/EnchantmentMenu.java b/src/main/java/net/minecraft/world/inventory/EnchantmentMenu.java
+index 343f44db579839eb61376f876b5eff2e615dc2e5..e6935b6632c7a7e07f4da459c95f564356242f98 100644
+--- a/src/main/java/net/minecraft/world/inventory/EnchantmentMenu.java
++++ b/src/main/java/net/minecraft/world/inventory/EnchantmentMenu.java
+@@ -229,7 +229,7 @@ public class EnchantmentMenu extends AbstractContainerMenu {
+                 return false;
+             } else if (this.costs[id] > 0 && !itemstack.isEmpty() && (player.experienceLevel >= j && player.experienceLevel >= this.costs[id] || player.getAbilities().instabuild)) {
+                 this.access.execute((world, blockposition) -> {
+-                    ItemStack itemstack2 = itemstack;
++                    ItemStack itemstack2 = itemstack; // Paper - diff on change
+                     List<EnchantmentInstance> list = this.getEnchantmentList(itemstack, id, this.costs[id]);
+ 
+                     // CraftBukkit start
+@@ -251,11 +251,18 @@ public class EnchantmentMenu extends AbstractContainerMenu {
+                             return;
+                         }
+                         // CraftBukkit end
+-                        boolean flag = itemstack.is(Items.BOOK);
++                        // Paper start
++                        itemstack2 = org.bukkit.craftbukkit.inventory.CraftItemStack.getOrCloneOnMutation(item, event.getItem());
++                        if (itemstack2 != itemstack) {
++                            this.enchantSlots.setItem(0, itemstack2);
++                        }
++                        boolean flag = itemstack2.is(Items.BOOK);
++                        // Paper end
+ 
+                         if (flag) {
++                            CompoundTag nbttagcompound = itemstack2.getTag(); // Paper - move up
+                             itemstack2 = new ItemStack(Items.ENCHANTED_BOOK);
+-                            CompoundTag nbttagcompound = itemstack.getTag();
++                            // Paper - move up
+ 
+                             if (nbttagcompound != null) {
+                                 itemstack2.setTag(nbttagcompound.copy());
+@@ -277,7 +284,7 @@ public class EnchantmentMenu extends AbstractContainerMenu {
+                                     EnchantmentInstance weightedrandomenchant = new EnchantmentInstance(nms, entry.getValue());
+                                     EnchantedBookItem.addEnchantment(itemstack2, weightedrandomenchant);
+                                 } else {
+-                                    item.addUnsafeEnchantment(entry.getKey(), entry.getValue());
++                                    CraftItemStack.asCraftMirror(itemstack2).addUnsafeEnchantment(entry.getKey(), entry.getValue()); // Paper
+                                 }
+                             } catch (IllegalArgumentException e) {
+                                 /* Just swallow invalid enchantments */