Hopper: java.lang.NullPointerException

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-91795/

Crash:

java.lang.NullPointerException
	at bhv.a(SourceFile:1343)
	at bho.a(SourceFile:813)

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

---- Minecraft Crash Report ----
// Oops.

Time: 9/6/13 11:06 PM
Description: Unexpected error

java.lang.NullPointerException
	at bhv.a(SourceFile:1343)
	at bho.a(SourceFile:813)
	at bho.b(SourceFile:697)
	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 bhv.a(SourceFile:1343)
	at bho.a(SourceFile:813)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bfn['Linnydude3347'/190, l='MpServer', x=8.50, y=66.62, z=8.50]]
	Chunk stats: MultiplayerChunkCache: 0, 0
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-72,64,256), Chunk: (at 8,4,0 in -5,16; contains blocks -80,0,256 to -65,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 190127 game time, 315102 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: survival (ID 0). Hardcore: false. Cheats: false
	Forced entities: 1 total; [bfn['Linnydude3347'/190, l='MpServer', x=8.50, y=66.62, z=8.50]]
	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:656)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w36b
	Operating System: Mac OS X (x86_64) version 10.8.4
	Java Version: 1.6.0_51, Apple Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
	Memory: 68894128 bytes (65 MB) / 146145280 bytes (139 MB) up to 1065025536 bytes (1015 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 3 (168 bytes; 0 MB) allocated, 3 (168 bytes; 0 MB) used
	IntCache: cache: 9, tcache: 152, allocated: 4, tallocated: 4
	Launched Version: 13w36b
	LWJGL: 2.9.0
	OpenGL: NVIDIA GeForce GT 330M OpenGL Engine GL version 2.1 NVIDIA-8.12.47 310.40.00.05f01, NVIDIA Corporation
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: [faithful32pack]
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 17 (952 bytes; 0 MB) allocated, 17 (952 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-91795/8545917/