Remove getCubes patch as under some circumstances it can loop around itself forever. For anyone wishing to reimplement this patch, the rationale behind it is quite simple, get all cubes within each chunk at the same time.

By: md_5 <git@md-5.net>

CraftBukkit-Patches/0017-Handle-Null-Tile-Entities.patch

@@ -0,0 +1,27 @@
+From eb1ccaae514228e6a8562824ee3ea0fbea940624 Mon Sep 17 00:00:00 2001
+From: md_5 <md_5@live.com.au>
+Date: Sun, 3 Feb 2013 09:20:19 +1100
+Subject: [PATCH] Handle Null Tile Entities
+
+
+diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
+index f1bf467..5a368a0 100644
+--- a/src/main/java/net/minecraft/server/World.java
++++ b/src/main/java/net/minecraft/server/World.java
+@@ -1292,6 +1292,13 @@ public abstract class World implements IBlockAccess {
+ 
+         while (iterator.hasNext()) {
+             TileEntity tileentity = (TileEntity) iterator.next();
++            // Spigot start
++            if (tileentity == null) {
++                getServer().getLogger().severe("Spigot has detected a null entity and has removed it, preventing a crash");
++                iterator.remove();
++                continue;
++            }
++            // Spigot end
+             // CraftBukkit start - Don't tick entities in chunks queued for unload
+             ChunkProviderServer chunkProviderServer = ((WorldServer) this).chunkProviderServer;
+             if (chunkProviderServer.unloadQueue.contains(tileentity.x >> 4, tileentity.z >> 4)) {
+-- 
+1.8.3.2
+