From c42286bc5459f181eba0f0e65f4a35d65c556978 Mon Sep 17 00:00:00 2001
From: BillyGalbreath <Blake.Galbreath@GMail.com>
Date: Fri, 7 Sep 2018 18:28:24 -0500
Subject: [PATCH] Fix #1420


diff --git a/src/main/java/net/minecraft/server/EntityArrow.java b/src/main/java/net/minecraft/server/EntityArrow.java
index a82dc0a94e..529629a867 100644
--- a/src/main/java/net/minecraft/server/EntityArrow.java
+++ b/src/main/java/net/minecraft/server/EntityArrow.java
@@ -492,6 +492,7 @@ public abstract class EntityArrow extends Entity implements IProjectile {
         if (!this.world.isClientSide && (this.inGround || this.q()) && this.shake <= 0) {
             // CraftBukkit start
             ItemStack itemstack = this.getItemStack();
+            if (!itemstack.isEmpty()) { // Paper - GH-1420 (skip pick up event for fully damaged (or air) itemstack)
             EntityItem item = new EntityItem(this.world, this.locX, this.locY, this.locZ, itemstack);
             if (this.fromPlayer == PickupStatus.ALLOWED && entityhuman.inventory.canHold(itemstack) > 0) {
                 PlayerPickupArrowEvent event = new PlayerPickupArrowEvent((org.bukkit.entity.Player) entityhuman.getBukkitEntity(), new org.bukkit.craftbukkit.entity.CraftItem(this.world.getServer(), this, item), (org.bukkit.entity.Arrow) this.getBukkitEntity());
@@ -502,9 +503,10 @@ public abstract class EntityArrow extends Entity implements IProjectile {
                     return;
                 }
             }
+            } // Paper - GH-1420
             boolean flag = this.fromPlayer == EntityArrow.PickupStatus.ALLOWED || this.fromPlayer == EntityArrow.PickupStatus.CREATIVE_ONLY && entityhuman.abilities.canInstantlyBuild || this.q() && this.getShooter().getUniqueID() == entityhuman.getUniqueID();
 
-            if (this.fromPlayer == EntityArrow.PickupStatus.ALLOWED && !entityhuman.inventory.pickup(item.getItemStack())) {
+            if (this.fromPlayer == EntityArrow.PickupStatus.ALLOWED && !entityhuman.inventory.pickup(itemstack)) { // Paper - GH-1420
                 // CraftBukkit end
                 flag = false;
             }
-- 
2.19.0