Hopper: java.lang.NullPointerException: Exception ticking world

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-963502/

Crash:

java.lang.NullPointerException: Exception ticking world
	at na.d(SourceFile:217)
	at nb.c(SourceFile:147)

The following is the first clean report made public about this crash:

---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 1/9/14 10:57 AM
Description: Exception ticking world

java.lang.NullPointerException: Exception ticking world
	at na.d(SourceFile:217)
	at nb.c(SourceFile:147)
	at net.minecraft.server.MinecraftServer.u(SourceFile:520)
	at net.minecraft.server.MinecraftServer.t(SourceFile:462)
	at bvc.t(SourceFile:123)
	at net.minecraft.server.MinecraftServer.run(SourceFile:380)
	at lr.run(SourceFile:648)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at na.d(SourceFile:217)
	at nb.c(SourceFile:147)

-- Affected level --
Details:
	Level name: New World
	All players: 1 total; [ne['jakecool19'/307, l='New World', x=141.04, y=130.49, z=-164.16]]
	Chunk stats: ServerChunkCache: 626 Drop: 48
	Level seed: 227209
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: -56.00,64.00,248.00 - World: (-56,64,248), Chunk: (at 8,4,8 in -4,15; contains blocks -64,0,240 to -49,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 267338 game time, 18904 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 17272 (now: true), thunder time: 82135 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.u(SourceFile:520)
	at net.minecraft.server.MinecraftServer.t(SourceFile:462)
	at bvc.t(SourceFile:123)
	at net.minecraft.server.MinecraftServer.run(SourceFile:380)
	at lr.run(SourceFile:648)

-- System Details --
Details:
	Minecraft Version: 14w02b
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 121640248 bytes (116 MB) / 443088896 bytes (422 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [ne['jakecool19'/307, l='New World', x=141.04, y=130.49, z=-164.16]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-963502/47048005/