Hopper: java.lang.NullPointerException: Ticking entity

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-398003/

Crash:

java.lang.NullPointerException: Ticking entity
	at vt.a(SourceFile:133)
	at vt.k(SourceFile:120)
	at vt.h(SourceFile:95)
	at afk.a(SourceFile:1368)
	at mi.a(SourceFile:479)
	at afk.g(SourceFile:1346)

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

---- Minecraft Crash Report ----
// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [~~HUG~~]

Time: 18/10/13 18:48
Description: Ticking entity

java.lang.NullPointerException: Ticking entity
	at vt.a(SourceFile:133)
	at vt.k(SourceFile:120)
	at vt.h(SourceFile:95)
	at afk.a(SourceFile:1368)
	at mi.a(SourceFile:479)
	at afk.g(SourceFile:1346)
	at afk.h(SourceFile:1253)
	at mi.h(SourceFile:364)
	at net.minecraft.server.MinecraftServer.u(SourceFile:511)
	at net.minecraft.server.MinecraftServer.t(SourceFile:441)
	at bsb.t(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:358)
	at kx.run(SourceFile:617)


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

-- Head --
Stacktrace:
	at vt.a(SourceFile:133)
	at vt.k(SourceFile:120)
	at vt.h(SourceFile:95)
	at afk.a(SourceFile:1368)
	at mi.a(SourceFile:479)
	at afk.g(SourceFile:1346)

-- Entity being ticked --
Details:
	Entity Type: Item (vt)
	Entity ID: 3734575
	Entity Name: ~~ERROR~~ NullPointerException: null
	Entity's Exact location: -269.12, 4.22, 105.98
	Entity's Block location: World: (-270,4,105), Chunk: (at 2,0,9 in -17,6; contains blocks -272,0,96 to -257,255,111), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Entity's Momentum: -0.18, -0.27, -0.18
Stacktrace:
	at afk.h(SourceFile:1253)
	at mi.h(SourceFile:364)

-- Affected level --
Details:
	Level name: ethoooooooooooo
	All players: 1 total; [ml['Jacobmoss2004'/23, l='ethoooooooooooo', x=-267.37, y=4.00, z=107.75]]
	Chunk stats: ServerChunkCache: 1176 Drop: 0
	Level seed: 7963924541642169251
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 2;7,2x3,2;1;village
	Level spawn location: World: (-213,4,266), Chunk: (at 11,0,10 in -14,16; contains blocks -224,0,256 to -209,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 20692 game time, 20692 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 99849 (now: false), thunder time: 57671 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.u(SourceFile:511)
	at net.minecraft.server.MinecraftServer.t(SourceFile:441)
	at bsb.t(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:358)
	at kx.run(SourceFile:617)

-- System Details --
Details:
	Minecraft Version: 13w42b
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_09, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 64652208 bytes (61 MB) / 181071872 bytes (172 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 4233 (237048 bytes; 0 MB) allocated, 3700 (207200 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 870 (48720 bytes; 0 MB) allocated, 792 (44352 bytes; 0 MB) used
	Player Count: 1 / 8; [ml['Jacobmoss2004'/23, l='ethoooooooooooo', x=-267.37, y=4.00, z=107.75]]
	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-398003/19109079/