From 24ff27b408ea3dd94fdc244d02591f900080e7f6 Mon Sep 17 00:00:00 2001
From: Travis Watkins <amaranth@ubuntu.com>
Date: Sat, 14 Dec 2013 17:23:34 -0600
Subject: [PATCH] Don't try to teleport to a null world. Fixes BUKKIT-5145

---
 src/main/java/net/minecraft/server/Entity.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index fec07f8637..dc0abc5974 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -1765,7 +1765,7 @@ public abstract class Entity {
             EntityPortalEvent event = new EntityPortalEvent(this.getBukkitEntity(), enter, exit, agent);
             event.useTravelAgent(useTravelAgent);
             event.getEntity().getServer().getPluginManager().callEvent(event);
-            if (event.isCancelled() || event.getTo() == null || !this.isAlive()) {
+            if (event.isCancelled() || event.getTo() == null || event.getTo().getWorld() == null || !this.isAlive()) {
                 return;
             }
             exit = event.useTravelAgent() ? event.getPortalTravelAgent().findOrCreate(event.getTo()) : event.getTo();