Paper/patches/server/0616-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 ede6e560cf0fe7dadab481f0d27a5edc4218d8bd..644d71c024103c39d7532559c810038d687106e5 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -3755,6 +3755,7 @@ 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();