Hopper: java.lang.ArrayIndexOutOfBoundsException: -5

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-191479/

Crash:

java.lang.ArrayIndexOutOfBoundsException: -5
	at b.a(SourceFile:330)
	at abw.a(SourceFile:2577)
	at bdd.a(SourceFile:284)

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

---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 9/19/13 3:45 PM
Description: Unexpected error

java.lang.ArrayIndexOutOfBoundsException: -5
	at b.a(SourceFile:330)
	at abw.a(SourceFile:2577)
	at bdd.a(SourceFile:284)
	at atv.k(SourceFile:1393)
	at atv.S(SourceFile:663)
	at atv.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 abw.a(SourceFile:2577)
	at bdd.a(SourceFile:284)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bdi['gengar313'/2437380, l='MpServer', x=219.05, y=238.62, z=61.13]]
	Chunk stats: MultiplayerChunkCache: 421
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (0,4,0), Chunk: (at 0,0,0 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: 377555 game time, 424111 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: true), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 53 total; [tw['Zombie'/2437378, l='MpServer', x=197.41, y=237.00, z=64.19], tt['Spider'/2437379, l='MpServer', x=192.19, y=237.00, z=106.00], tr['Skeleton'/2437376, l='MpServer', x=193.50, y=237.00, z=16.50], tr['Skeleton'/2437377, l='MpServer', x=195.16, y=237.00, z=56.53], tr['Skeleton'/2437382, l='MpServer', x=216.25, y=237.00, z=21.78], tr['Skeleton'/2437383, l='MpServer', x=207.88, y=237.00, z=30.63], tf['Creeper'/2437381, l='MpServer', x=210.91, y=237.00, z=-14.47], bdi['gengar313'/2437380, l='MpServer', x=219.05, y=238.62, z=61.13], tf['Creeper'/2437384, l='MpServer', x=219.16, y=237.00, z=42.09], tr['Skeleton'/2437385, l='MpServer', x=212.53, y=237.00, z=128.50], tr['Skeleton'/2437390, l='MpServer', x=228.56, y=237.00, z=100.69], tr['Skeleton'/2437391, l='MpServer', x=231.84, y=237.00, z=108.47], tf['Creeper'/2437388, l='MpServer', x=227.47, y=237.00, z=20.66], tw['Zombie'/2437389, l='MpServer', x=233.25, y=237.00, z=22.50], tw['Zombie'/2437399, l='MpServer', x=242.22, y=237.00, z=22.91], tt['Spider'/2437403, l='MpServer', x=255.84, y=237.00, z=83.66], tt['Spider'/2437402, l='MpServer', x=245.41, y=237.00, z=75.88], tt['Spider'/2437401, l='MpServer', x=252.25, y=237.00, z=70.94], tt['Spider'/2437400, l='MpServer', x=249.50, y=237.00, z=29.72], tt['Spider'/2437407, l='MpServer', x=258.06, y=237.00, z=79.00], tt['Spider'/2437405, l='MpServer', x=246.09, y=237.00, z=97.91], tf['Creeper'/2437404, l='MpServer', x=246.50, y=237.00, z=80.50], tr['Skeleton'/2437408, l='MpServer', x=279.25, y=237.00, z=-2.16], tf['Creeper'/2437409, l='MpServer', x=284.75, y=237.00, z=40.44], tw['Zombie'/2437410, l='MpServer', x=282.50, y=237.00, z=35.50], tt['Spider'/2437411, l='MpServer', x=287.34, y=237.00, z=49.66], tr['Skeleton'/2437412, l='MpServer', x=286.72, y=237.00, z=138.25], tw['Zombie'/2437414, l='MpServer', x=294.56, y=237.00, z=127.91], tw['Zombie'/2437415, l='MpServer', x=297.50, y=237.00, z=126.50], tr['Skeleton'/2437416, l='MpServer', x=295.50, y=237.00, z=134.50], tf['Creeper'/2437337, l='MpServer', x=141.78, y=237.00, z=72.97], tr['Skeleton'/2437338, l='MpServer', x=139.97, y=237.00, z=126.00], tw['Zombie'/2437374, l='MpServer', x=202.02, y=237.00, z=22.34], tw['Zombie'/2437375, l='MpServer', x=207.50, y=237.00, z=21.50], tw['Zombie'/2437372, l='MpServer', x=195.41, y=237.00, z=26.84], tw['Zombie'/2437373, l='MpServer', x=201.50, y=237.00, z=20.50], tt['Spider'/2437370, l='MpServer', x=204.91, y=237.00, z=2.50], tt['Spider'/2437371, l='MpServer', x=202.06, y=237.00, z=5.25], tt['Spider'/2437366, l='MpServer', x=175.72, y=237.00, z=118.88], tr['Skeleton'/2437364, l='MpServer', x=173.09, y=237.00, z=97.94], tw['Zombie'/2437365, l='MpServer', x=188.50, y=237.00, z=119.50], tw['Zombie'/2437362, l='MpServer', x=186.69, y=237.00, z=69.16], tw['Zombie'/2437363, l='MpServer', x=190.63, y=237.00, z=66.16], tr['Skeleton'/2437356, l='MpServer', x=181.75, y=237.00, z=93.25], tw['Zombie'/2437355, l='MpServer', x=173.50, y=237.00, z=81.50], tf['Creeper'/2437354, l='MpServer', x=171.50, y=237.00, z=95.50], tr['Skeleton'/2437353, l='MpServer', x=166.50, y=237.00, z=61.50], tt['Spider'/2437352, l='MpServer', x=158.50, y=237.00, z=120.75], tf['Creeper'/2437351, l='MpServer', x=147.50, y=237.00, z=125.50], tf['Creeper'/2437350, l='MpServer', x=149.50, y=237.00, z=79.50], tw['Zombie'/2437349, l='MpServer', x=152.84, y=237.00, z=60.31], tw['Zombie'/2437348, l='MpServer', x=158.50, y=237.00, z=55.50], tw['Zombie'/2437347, l='MpServer', x=154.50, y=237.00, z=51.50]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bdd.a(SourceFile:284)
	at atv.b(SourceFile:1761)
	at atv.d(SourceFile:633)
	at net.minecraft.client.main.Main.main(SourceFile:101)

-- System Details --
Details:
	Minecraft Version: 1.6.4
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_10, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 208152 bytes (0 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: 43345 (2427320 bytes; 2 MB) allocated, 827 (46312 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
	Launched Version: 1.6.4
	LWJGL: 2.9.0
	OpenGL: GeForce GT 220/PCIe/SSE2 GL version 3.3.0, NVIDIA Corporation
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Pack: Default
	Current Language: English (UK)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 1247 (69832 bytes; 0 MB) allocated, 120 (6720 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-191479/12423086/