PaperMC/patches/server/0510-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 7e4f3f88cbd79a497aeaa65b5fb0997d27d4ee0f..d2bb6d312e67462e36cffb8de26b88e3050d0518 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -4011,6 +4011,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
                         this.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();