Paper/patches/server/0621-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 fbd33490d7e1394c0989ca20fb36f0033a9e1c26..96cac8f212de9ae3d7cfdc2c04bc0e8fd07e3efe 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -3707,6 +3707,7 @@ public abstract class LivingEntity extends Entity {
                     level.getCraftServer().getPluginManager().callEvent(event);
 
                     if (event.isCancelled()) {
+                        this.stopUsingItem(); // Paper - event is using an item, clear active item to reset its use
                         // Update client
                         ((ServerPlayer) this).getBukkitEntity().updateInventory();
                         ((ServerPlayer) this).getBukkitEntity().updateScaledHealth();