Paper/patches/server/0503-Fix-PlayerItemConsumeEvent-cancelling-properly.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: chickeneer <emcchickeneer@gmail.com>
Date: Fri, 19 Mar 2021 00:33:15 -0500
Subject: [PATCH] Fix PlayerItemConsumeEvent cancelling properly

When the active item is not cleared, the item is still readied
for use and will repeatedly trigger the PlayerItemConsumeEvent
till their item is switched.
This patch clears the active item when the event is cancelled

diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index a0b90b18e8f8970e722ebd0e78113f55ff54a55b..6eda6f62e54eefddad51033e7d69c76ffc110a6d 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -4142,6 +4142,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
                             }
                             entityPlayer.getBukkitEntity().updateInventory();
                             entityPlayer.getBukkitEntity().updateScaledHealth();
+                            this.stopUsingItem(); // Paper - event is using an item, clear active item to reset its use
                             return;
                         }