Hopper: java.lang.NullPointerException

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-197276/

Crash:

java.lang.NullPointerException
	at azq.a(SourceFile:76)
	at bbo.a(SourceFile:155)

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

---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 20/09/13 3:41 PM
Description: Rendering screen

java.lang.NullPointerException
	at azq.a(SourceFile:76)
	at bbo.a(SourceFile:155)
	at bii.b(SourceFile:844)
	at awp.aa(SourceFile:754)
	at awp.e(SourceFile:677)
	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 azq.a(SourceFile:76)
	at bbo.a(SourceFile:155)

-- Screen render details --
Details:
	Screen name: bbo
	Mouse location: Scaled: (170, 72). Absolute: (341, 334)
	Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bgh['movemaker3'/133848, l='MpServer', x=440.30, y=59.74, z=-683.40]]
	Chunk stats: MultiplayerChunkCache: 135, 135
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (407,4,-690), Chunk: (at 7,0,14 in 25,-44; contains blocks 400,0,-704 to 415,255,-689), Region: (0,-2; contains chunks 0,-64 to 31,-33, blocks 0,0,-1024 to 511,255,-513)
	Level time: 426613 game time, 1000 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: 19 total; [bgh['movemaker3'/133848, l='MpServer', x=440.30, y=59.74, z=-683.40], vc['Villager'/133842, l='MpServer', x=439.75, y=56.00, z=-742.47], vc['Villager'/133843, l='MpServer', x=437.31, y=55.00, z=-730.31], tz['entity.MinecartRideable.name'/133840, l='MpServer', x=440.50, y=53.50, z=-743.50], tz['entity.MinecartRideable.name'/133841, l='MpServer', x=436.63, y=53.50, z=-743.50], vc['Villager'/133846, l='MpServer', x=445.41, y=56.00, z=-615.34], vc['Villager'/133844, l='MpServer', x=436.50, y=56.00, z=-712.88], vc['Villager'/133845, l='MpServer', x=438.69, y=58.00, z=-683.84], pc['entity.ItemFrame.name'/133835, l='MpServer', x=390.50, y=57.50, z=-746.06], pc['entity.ItemFrame.name'/133834, l='MpServer', x=388.94, y=56.50, z=-745.50], pc['entity.ItemFrame.name'/133833, l='MpServer', x=389.50, y=57.50, z=-746.06], pc['entity.ItemFrame.name'/133832, l='MpServer', x=390.50, y=56.50, z=-746.06], tz['entity.MinecartRideable.name'/133839, l='MpServer', x=419.94, y=56.34, z=-685.66], vi['arrow'/133837, l='MpServer', x=393.00, y=55.05, z=-706.00], pc['entity.ItemFrame.name'/133836, l='MpServer', x=389.50, y=56.50, z=-746.06], pc['entity.ItemFrame.name'/133831, l='MpServer', x=391.50, y=56.50, z=-746.06], pc['entity.ItemFrame.name'/133830, l='MpServer', x=391.50, y=57.50, z=-746.06], pc['entity.ItemFrame.name'/133829, l='MpServer', x=392.50, y=56.50, z=-746.06], pc['entity.ItemFrame.name'/133828, l='MpServer', x=392.50, y=57.50, z=-746.06]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bgc.a(SourceFile:297)
	at awp.b(SourceFile:1874)
	at awp.e(SourceFile:686)
	at net.minecraft.client.main.Main.main(SourceFile:104)

-- System Details --
Details:
	Minecraft Version: 13w38c
	Operating System: Windows 8 (amd64) version 6.2
	Java Version: 1.7.0_21, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 167693504 bytes (159 MB) / 464060416 bytes (442 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 20003 (1120168 bytes; 1 MB) allocated, 3 (168 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 13w38c
	LWJGL: 2.9.0
	OpenGL: GeForce GT 620/PCIe/SSE2 GL version 4.2.0, 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: 139 (7784 bytes; 0 MB) allocated, 42 (2352 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-197276/12690677/