Paper/CraftBukkit-Patches/0021-Detect-remove-and-warn-about-null-tile-entities.patch

From 90775f48e28029d31d9760dce09695840d25ea85 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] Detect, remove and warn about null tile entities.

---
 src/main/java/net/minecraft/server/World.java |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index 0afe88d..c390e65 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -1334,6 +1334,13 @@ 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)) {
-- 
1.7.0.4