Hopper: java.lang.NullPointerException

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-248638/

Crash:

java.lang.NullPointerException
	at azr.a(SourceFile:76)
	at bbp.a(SourceFile:158)

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

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 9/27/13 6:16 PM
Description: Rendering screen

java.lang.NullPointerException
	at azr.a(SourceFile:76)
	at bbp.a(SourceFile:158)
	at bik.b(SourceFile:847)
	at awq.aa(SourceFile:781)
	at awq.e(SourceFile:704)
	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 azr.a(SourceFile:76)
	at bbp.a(SourceFile:158)

-- Screen render details --
Details:
	Screen name: bbp
	Mouse location: Scaled: (228, 86). Absolute: (684, 578)
	Screen size: Scaled: (534, 279). Absolute: (1600, 837). Scale factor of 3

-- Affected level --
Details:
	Level name: MpServer
	All players: 2 total; [bgi['Hanstheking'/30, l='MpServer', x=-1372.93, y=53.62, z=353.96], bid['AsmusStorm'/28, l='MpServer', x=-1425.84, y=52.00, z=308.91]]
	Chunk stats: MultiplayerChunkCache: 411, 411
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-1331,4,351), Chunk: (at 13,0,15 in -84,21; contains blocks -1344,0,336 to -1329,255,351), Region: (-3,0; contains chunks -96,0 to -65,31, blocks -1536,0,0 to -1025,255,511)
	Level time: 601556 game time, 3671 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: 16 total; [bgi['Hanstheking'/30, l='MpServer', x=-1372.93, y=53.62, z=353.96], vh['arrow'/2, l='MpServer', x=-1428.00, y=51.78, z=382.50], vh['arrow'/3, l='MpServer', x=-1419.06, y=51.53, z=372.38], bid['AsmusStorm'/28, l='MpServer', x=-1425.84, y=52.00, z=308.91], ph['Painting'/4, l='MpServer', x=-1395.06, y=54.00, z=306.00], so['Donkey'/5, l='MpServer', x=-1398.97, y=52.00, z=318.41], so['Horse'/6, l='MpServer', x=-1400.22, y=52.00, z=330.81], so['Horse'/7, l='MpServer', x=-1377.34, y=52.00, z=300.75], so['Horse'/8, l='MpServer', x=-1386.25, y=52.00, z=300.28], so['Horse'/9, l='MpServer', x=-1385.12, y=52.00, z=298.50], ph['Painting'/4, l='MpServer', x=-1395.06, y=54.00, z=306.00], vb['Villager'/10, l='MpServer', x=-1369.88, y=52.00, z=351.69], ty['entity.MinecartRideable.name'/11, l='MpServer', x=-1357.50, y=47.50, z=425.47], pa['entity.LeashKnot.name'/23, l='MpServer', x=-1380.50, y=52.50, z=300.50], pa['entity.LeashKnot.name'/22, l='MpServer', x=-1398.50, y=52.50, z=332.50], bid['AsmusStorm'/28, l='MpServer', x=-1425.84, y=52.00, z=308.91]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Non-integrated multiplayer server
Stacktrace:
	at bgd.a(SourceFile:301)
	at awq.b(SourceFile:1901)
	at awq.e(SourceFile:713)
	at net.minecraft.client.main.Main.main(SourceFile:104)

-- System Details --
Details:
	Minecraft Version: 13w39b
	Operating System: Windows 8 (amd64) version 6.2
	Java Version: 1.7.0_07, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 210424616 bytes (200 MB) / 318373888 bytes (303 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 14061 (787416 bytes; 0 MB) allocated, 3 (168 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 13w39b
	LWJGL: 2.9.0
	OpenGL: GeForce GT 650M/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 (UK)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 82 (4592 bytes; 0 MB) allocated, 39 (2184 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-248638/14633559/