Hopper: java.lang.NullPointerException: Rendering screen

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-190912/

Crash:

java.lang.NullPointerException
	at azo.a(SourceFile:76)
	at bbm.a(SourceFile:159)

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

---- Minecraft Crash Report ----
// I blame Dinnerbone.

Time: 19.09.13 18:56
Description: Rendering screen

java.lang.NullPointerException
	at azo.a(SourceFile:76)
	at bbm.a(SourceFile:159)
	at big.b(SourceFile:837)
	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 azo.a(SourceFile:76)
	at bbm.a(SourceFile:159)

-- Screen render details --
Details:
	Screen name: bbm
	Mouse location: Scaled: (250, 69). Absolute: (500, 340)
	Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bgf['Crux98'/19, l='MpServer', x=29,42, y=94,69, z=268,58]]
	Chunk stats: MultiplayerChunkCache: 271, 271
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (41,4,363), Chunk: (at 9,0,11 in 2,22; contains blocks 32,0,352 to 47,255,367), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 734758 game time, 8335 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: 20 total; [pb['entity.ItemFrame.name'/0, l='MpServer', x=13,06, y=91,50, z=276,50], vb['Villager'/1, l='MpServer', x=11,53, y=90,00, z=278,25], vb['Villager'/2, l='MpServer', x=11,34, y=89,50, z=274,25], vb['Villager'/3, l='MpServer', x=30,69, y=-16360,47, z=259,31], sm['Bat'/4, l='MpServer', x=5,57, y=47,06, z=283,06], pb['entity.ItemFrame.name'/5, l='MpServer', x=27,50, y=91,50, z=261,06], pb['entity.ItemFrame.name'/6, l='MpServer', x=28,50, y=91,50, z=261,06], vh['arrow'/7, l='MpServer', x=26,66, y=95,00, z=264,50], vb['Villager'/8, l='MpServer', x=30,06, y=89,00, z=268,53], pb['entity.ItemFrame.name'/9, l='MpServer', x=28,50, y=91,50, z=290,94], pb['entity.ItemFrame.name'/10, l='MpServer', x=27,50, y=91,50, z=290,94], vh['arrow'/11, l='MpServer', x=32,16, y=94,81, z=264,50], vb['Villager'/12, l='MpServer', x=44,69, y=-28456,57, z=274,69], vb['Villager'/13, l='MpServer', x=44,50, y=-32088,22, z=278,28], sm['Bat'/14, l='MpServer', x=44,73, y=50,70, z=278,44], pb['entity.ItemFrame.name'/15, l='MpServer', x=42,94, y=91,50, z=275,50], pb['entity.ItemFrame.name'/17, l='MpServer', x=42,94, y=91,50, z=288,50], pb['entity.ItemFrame.name'/16, l='MpServer', x=42,94, y=91,50, z=276,50], pb['entity.ItemFrame.name'/18, l='MpServer', x=40,50, y=91,50, z=290,94], bgf['Crux98'/19, l='MpServer', x=29,42, y=94,69, z=268,58]]
	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 (amd64) version 6.1
	Java Version: 1.6.0_31, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
	Memory: 128324168 bytes (122 MB) / 369950720 bytes (352 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 5299 (296744 bytes; 0 MB) allocated, 225 (12600 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 13w38a
	LWJGL: 2.9.0
	OpenGL: ATI Radeon HD 4250       GL version 3.3.10524 Compatibility Profile Context, ATI Technologies Inc.
	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: 67 (3752 bytes; 0 MB) allocated, 55 (3080 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-190912/12382550/