From c639bec16cc54169797c3fd06597324b71792c9b Mon Sep 17 00:00:00 2001
From: Joseph Hirschfeld <joe@ibj.io>
Date: Thu, 3 Mar 2016 02:33:53 -0600
Subject: [PATCH] Ensure inv drag is in bounds


diff --git a/src/main/java/net/minecraft/server/Container.java b/src/main/java/net/minecraft/server/Container.java
index 5cebc7506f..b4fcab4f08 100644
--- a/src/main/java/net/minecraft/server/Container.java
+++ b/src/main/java/net/minecraft/server/Container.java
@@ -201,7 +201,7 @@ public abstract class Container {
                     this.d();
                 }
             } else if (this.h == 1) {
-                Slot slot = (Slot) this.slots.get(i);
+                Slot slot = i < this.slots.size() ? this.slots.get(i) : null; // Paper - Ensure drag in bounds
 
                 itemstack1 = playerinventory.getCarried();
                 if (slot != null && a(slot, itemstack1, true) && slot.isAllowed(itemstack1) && (this.dragType == 2 || itemstack1.getCount() > this.i.size()) && this.b(slot)) {
-- 
2.21.0