Hopper: java.lang.ArrayIndexOutOfBoundsException: -8

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-12273/

Crash:

java.lang.ArrayIndexOutOfBoundsException: -8
	at b.a(SourceFile:330)
	at b.a(SourceFile:317)
	at bij.a(SourceFile:77)
	at bij.a(SourceFile:37)
	at bfi.a(SourceFile:767)
	at bfb.a(SourceFile:797)

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

---- Minecraft Crash Report ----
// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [~~HUG~~]

Time: 8/3/13 8:47 PM
Description: Unexpected error

java.lang.ArrayIndexOutOfBoundsException: -8
	at b.a(SourceFile:330)
	at b.a(SourceFile:317)
	at bij.a(SourceFile:77)
	at bij.a(SourceFile:37)
	at bfi.a(SourceFile:767)
	at bfb.a(SourceFile:797)
	at bfb.b(SourceFile:695)
	at ats.S(SourceFile:686)
	at ats.d(SourceFile:619)
	at net.minecraft.client.main.Main.main(SourceFile:101)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at b.a(SourceFile:330)
	at b.a(SourceFile:317)
	at bij.a(SourceFile:77)
	at bij.a(SourceFile:37)
	at bfi.a(SourceFile:767)
	at bfb.a(SourceFile:797)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bdf['13atBab13s13'/1792561, l='MpServer', x=8.50, y=66.62, z=8.50]]
	Chunk stats: MultiplayerChunkCache: 0
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (8,64,8), Chunk: (at 8,4,8 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 0 game time, 0 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: 9 total; [tq['Skeleton'/1984429, l='MpServer', x=76.53, y=13.00, z=167.06], tv['Zombie'/1991513, l='MpServer', x=161.50, y=25.00, z=146.50], te['Creeper'/1987774, l='MpServer', x=172.50, y=36.00, z=115.50], te['Creeper'/2005040, l='MpServer', x=88.50, y=21.00, z=178.50], tv['Zombie'/1984426, l='MpServer', x=69.56, y=15.00, z=164.00], rn['Bat'/2000469, l='MpServer', x=187.47, y=31.84, z=112.25], sb['Squid'/1986231, l='MpServer', x=142.25, y=51.34, z=127.94], rn['Bat'/2000468, l='MpServer', x=184.66, y=37.72, z=118.69], bdf['13atBab13s13'/1792561, 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 bda.a(SourceFile:284)
	at ats.b(SourceFile:1761)
	at ats.d(SourceFile:633)
	at net.minecraft.client.main.Main.main(SourceFile:101)

-- System Details --
Details:
	Minecraft Version: 1.6.2
	Operating System: Windows 8 (x86) version 6.2
	Java Version: 1.7.0_15, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 12889256 bytes (12 MB) / 518979584 bytes (494 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 5751 (322056 bytes; 0 MB) allocated, 5751 (322056 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
	Launched Version: 1.6.2
	LWJGL: 2.9.0
	OpenGL: Intel(R) HD Graphics 4000 GL version 4.0.0 - Build 9.17.10.2828, Intel
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Pack: Default
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 18 (1008 bytes; 0 MB) allocated, 18 (1008 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-12273/230201/