Hopper: java.lang.NullPointerException

java.lang.NullPointerException
	at zg.d(SourceFile:105)
	at bjz.a(SourceFile:148)
	at bjz.a(SourceFile:29)
	at bjp.b(SourceFile:46)
	at bjz.a(SourceFile:45)
	at bjz.a(SourceFile:29)

---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 28.09.13 21:12
Description: Rendering entity in world

java.lang.NullPointerException
	at zg.d(SourceFile:105)
	at bjz.a(SourceFile:148)
	at bjz.a(SourceFile:29)
	at bjp.b(SourceFile:46)
	at bjz.a(SourceFile:45)
	at bjz.a(SourceFile:29)
	at bjo.a(SourceFile:215)
	at bjo.a(SourceFile:190)
	at bjo.a(SourceFile:167)
	at bin.a(SourceFile:347)
	at big.a(SourceFile:966)
	at big.b(SourceFile:798)
	at awo.aa(SourceFile:758)
	at awo.e(SourceFile:681)
	at net.minecraft.client.main.Main.main(SourceFile:104)


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

-- Head --
Stacktrace:
	at zg.d(SourceFile:105)
	at bjz.a(SourceFile:148)
	at bjz.a(SourceFile:29)
	at bjp.b(SourceFile:46)
	at bjz.a(SourceFile:45)
	at bjz.a(SourceFile:29)

-- Entity being rendered --
Details:
	Entity Type: Item (ts)
	Entity ID: 222257
	Entity Name: ~~ERROR~~ NullPointerException: null
	Entity's Exact location: 29,50, 66,00, 22,50
	Entity's Block location: World: (29,66,22), Chunk: (at 13,4,6 in 1,1; contains blocks 16,0,16 to 31,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Entity's Momentum: 0,04, 0,20, -0,02

-- Renderer details --
Details:
	Assigned renderer: bjz@82c281
	Location: -6,54,-0,62,-1,17 - World: (-7,-1,-2), Chunk: (at 9,-1,14 in -1,-1; contains blocks -16,0,-16 to -1,255,-1), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
	Rotation: 62.515694
	Delta: 0.24561107
Stacktrace:
	at bjo.a(SourceFile:215)
	at bjo.a(SourceFile:190)
	at bjo.a(SourceFile:167)
	at bin.a(SourceFile:347)
	at big.a(SourceFile:966)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bgf['_Vanver_'/13, l='MpServer', x=36,04, y=66,62, z=23,67]]
	Chunk stats: MultiplayerChunkCache: 301, 301
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (0,64,0), Chunk: (at 0,4,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 436588 game time, 6024 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: ~~ERROR~~ NullPointerException: null
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bga.a(SourceFile:294)
	at awo.b(SourceFile:1872)
	at awo.e(SourceFile:690)
	at net.minecraft.client.main.Main.main(SourceFile:104)

-- System Details --
Details:
	Minecraft Version: 13w38a
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_40, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 82979536 bytes (79 MB) / 367316992 bytes (350 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 516 (28896 bytes; 0 MB) allocated, 218 (12208 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 13w38a
	LWJGL: 2.9.0
	OpenGL: GeForce GTX 460 SE/PCIe/SSE2/3DNOW! GL version 4.3.0, NVIDIA Corporation
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 99 (5544 bytes; 0 MB) allocated, 83 (4648 bytes; 0 MB) used