From 909622fd5e599b84e0e83d593097fd87d1b2f223 Mon Sep 17 00:00:00 2001
From: Brokkonaut <hannos17@gmx.de>
Date: Sun, 4 Sep 2016 16:35:43 -0500
Subject: [PATCH] Fix AIOOBE in inventory handling


diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
index 3ff82f71b..1c881e7a7 100644
--- a/src/main/java/net/minecraft/server/PlayerConnection.java
+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
@@ -2086,7 +2086,7 @@ public class PlayerConnection implements PacketListenerPlayIn, ITickable {
                     case CLONE:
                         if (packetplayinwindowclick.d() == 2) {
                             click = ClickType.MIDDLE;
-                            if (packetplayinwindowclick.c() == -999) {
+                            if (packetplayinwindowclick.c() < 0) { // Paper - GH-404
                                 action = InventoryAction.NOTHING;
                             } else {
                                 Slot slot = this.player.activeContainer.getSlot(packetplayinwindowclick.c());
-- 
2.19.2