Hopper: java.lang.NullPointerException

java.lang.NullPointerException
	at azw.a(SourceFile:188)
	at bau.a(SourceFile:155)

---- Minecraft Crash Report ----
// I feel sad now :(

Time: 07.09.13 17:44
Description: Rendering screen

java.lang.NullPointerException
	at azw.a(SourceFile:188)
	at bau.a(SourceFile:155)
	at bho.b(SourceFile:720)
	at awb.V(SourceFile:713)
	at awb.e(SourceFile:642)
	at net.minecraft.client.main.Main.main(SourceFile:103)


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

-- Head --
Stacktrace:
	at azw.a(SourceFile:188)
	at bau.a(SourceFile:155)

-- Screen render details --
Details:
	Screen name: bau
	Mouse location: Scaled: (175, 77). Absolute: (351, 324)
	Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bfn['team_ben'/2, l='MpServer', x=173,21, y=57,62, z=184,89]]
	Chunk stats: MultiplayerChunkCache: 225, 225
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (170,4,208), Chunk: (at 10,0,0 in 10,13; contains blocks 160,0,208 to 175,255,223), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 220111 game time, 6000 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: 4 total; [us['Leogas'/0, l='MpServer', x=171,50, y=57,00, z=173,50], us['Eletor'/1, l='MpServer', x=181,50, y=58,00, z=190,31], bfn['team_ben'/2, l='MpServer', x=173,21, y=57,62, z=184,89], us['Leogas'/10, l='MpServer', x=171,50, y=57,00, z=183,50]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bfi.a(SourceFile:285)
	at awb.b(SourceFile:1813)
	at awb.e(SourceFile:651)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w36b
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_17, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 1860931952 bytes (1774 MB) / 2112618496 bytes (2014 MB) up to 3186360320 bytes (3038 MB)
	JVM Flags: 5 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -Xincgc -Xms2048m -Xmx3072m
	AABB Pool Size: 168 (9408 bytes; 0 MB) allocated, 3 (168 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 13w36b
	LWJGL: 2.9.0
	OpenGL: GeForce GTS 450/PCIe/SSE2 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 (UK)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 87 (4872 bytes; 0 MB) allocated, 33 (1848 bytes; 0 MB) used