Hopper: java.lang.NullPointerException

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-77292/

Crash:

java.lang.NullPointerException
	at ny.f(SourceFile:108)
	at zj.a(SourceFile:204)
	at yx.a(SourceFile:433)
	at azr.a(SourceFile:188)
	at baf.a(SourceFile:581)
	at azr.a(SourceFile:168)
	at bai.a(SourceFile:30)
	at baf.a(SourceFile:530)

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

---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 6/09/13 11:41
Description: Rendering screen

java.lang.NullPointerException
	at ny.f(SourceFile:108)
	at zj.a(SourceFile:204)
	at yx.a(SourceFile:433)
	at azr.a(SourceFile:188)
	at baf.a(SourceFile:581)
	at azr.a(SourceFile:168)
	at bai.a(SourceFile:30)
	at baf.a(SourceFile:530)
	at bhh.b(SourceFile:720)
	at avx.V(SourceFile:713)
	at avx.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 ny.f(SourceFile:108)
	at zj.a(SourceFile:204)
	at yx.a(SourceFile:433)
	at azr.a(SourceFile:188)
	at baf.a(SourceFile:581)
	at azr.a(SourceFile:168)
	at bai.a(SourceFile:30)
	at baf.a(SourceFile:530)

-- Screen render details --
Details:
	Screen name: baf
	Mouse location: Scaled: (366, 269). Absolute: (733, 361)
	Screen size: Scaled: (800, 450). Absolute: (1600, 900). Scale factor of 2

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bfg['jriolopez'/5, l='MpServer', x=-332,26, y=57,62, z=-876,72]]
	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: (-332,4,-783), Chunk: (at 4,0,1 in -21,-49; contains blocks -336,0,-784 to -321,255,-769), Region: (-1,-2; contains chunks -32,-64 to -1,-33, blocks -512,0,-1024 to -1,255,-513)
	Level time: 53073 game time, 10097 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: 6 total; [os['entity.ItemFrame.name'/0, l='MpServer', x=-333,94, y=57,50, z=-821,50], os['entity.ItemFrame.name'/1, l='MpServer', x=-333,94, y=57,50, z=-822,50], os['entity.ItemFrame.name'/2, l='MpServer', x=-333,94, y=57,50, z=-823,50], os['entity.ItemFrame.name'/3, l='MpServer', x=-333,94, y=57,50, z=-824,50], os['entity.ItemFrame.name'/4, l='MpServer', x=-333,94, y=57,50, z=-825,50], bfg['jriolopez'/5, l='MpServer', x=-332,26, y=57,62, z=-876,72]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bfb.a(SourceFile:285)
	at avx.b(SourceFile:1813)
	at avx.e(SourceFile:651)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w36a
	Operating System: Windows 8 (amd64) version 6.2
	Java Version: 1.7.0_11, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 222923264 bytes (212 MB) / 495583232 bytes (472 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 11638 (651728 bytes; 0 MB) allocated, 5 (280 bytes; 0 MB) used
	Suspicious classes: [com.ibm.icu.text.ArabicShapingException], [gnu.trove.TIntCollection], [gnu.trove.impl.HashFunctions, PrimeFinder], [gnu.trove.impl.hash.THash, TPrimitiveHash, TIntIntHash], [gnu.trove.iterator.TIterator, TAdvancingIterator, TIntIntIterator], [gnu.trove.map.TIntIntMap], [gnu.trove.map.hash.TIntIntHashMap], [gnu.trove.procedure.TIntIntProcedure], [gnu.trove.set.TIntSet]
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 13w36a
	LWJGL: 2.9.0
	OpenGL: GeForce GT 620/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: Español (España)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 69 (3864 bytes; 0 MB) allocated, 41 (2296 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-77292/8288745/