PaperMC/Spigot-Server-Patches/0333-MC-136865-Use-valid-item-for-enchantment-checks-on-b.patch

From e8401927cb5951f9f934619dc3b1afa8be467dab Mon Sep 17 00:00:00 2001
From: MisterVector <whizkid3000@hotmail.com>
Date: Thu, 1 Nov 2018 14:50:05 -0700
Subject: [PATCH] MC-136865: Use valid item for enchantment checks on block
 break

When an itemstack runs out of durability, the amount is reduced to
0 which then marks the item as invalid. This causes the last unit
of durability to not apply enchantments as the enchantment level
check sees the item as a dud.

keep the clone of the item used to a non empty value so it represents
the item used.

diff --git a/src/main/java/net/minecraft/server/PlayerInteractManager.java b/src/main/java/net/minecraft/server/PlayerInteractManager.java
index a898535d1b..f953bd7ceb 100644
--- a/src/main/java/net/minecraft/server/PlayerInteractManager.java
+++ b/src/main/java/net/minecraft/server/PlayerInteractManager.java
@@ -352,9 +352,10 @@ public class PlayerInteractManager {
                     ItemStack itemstack = this.player.getItemInMainHand();
                     boolean flag1 = this.player.hasBlock(iblockdata);
 
+                    ItemStack itemstack1 = flag && flag1 && event.isDropItems() && !itemstack.isEmpty() ? itemstack.cloneItemStack() : ItemStack.a; // Paper - MC-136865 - clone before use
                     itemstack.a(this.world, iblockdata, blockposition, this.player);
                     if (flag && flag1 && event.isDropItems()) { // CraftBukkit - Check if block should drop items
-                        ItemStack itemstack1 = itemstack.isEmpty() ? ItemStack.a : itemstack.cloneItemStack();
+                        //ItemStack itemstack1 = itemstack.isEmpty() ? ItemStack.a : itemstack.cloneItemStack(); // Paper - MC-136865 - move up
 
                         block.a(this.world, this.player, blockposition, iblockdata, tileentity, itemstack1);
                     }
-- 
2.22.0