Hopper: java.lang.ArrayIndexOutOfBoundsException: -7

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-22380/

Crash:

java.lang.ArrayIndexOutOfBoundsException: -7
	at b.a(SourceFile:330)
	at b.a(SourceFile:317)
	at bij.a(SourceFile:77)
	at bij.a(SourceFile:37)
	at avg.a(SourceFile:97)

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

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

Time: 2013-08-04 17:11
Description: Unexpected error

java.lang.ArrayIndexOutOfBoundsException: -7
	at b.a(SourceFile:330)
	at b.a(SourceFile:317)
	at bij.a(SourceFile:77)
	at bij.a(SourceFile:37)
	at avg.a(SourceFile:97)
	at bfb.b(SourceFile:700)
	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 avg.a(SourceFile:97)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bdf['totalnoob43'/200, l='MpServer', x=267,17, y=69,62, z=-773,94]]
	Chunk stats: MultiplayerChunkCache: 20
	Level seed: 0
	Level generator: ID 02 - largeBiomes, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-88,64,-13), Chunk: (at 8,4,3 in -6,-1; contains blocks -96,0,-16 to -81,255,-1), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
	Level time: 16325 game time, 16325 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: 28 total; [tv['Zombie'/343, l='MpServer', x=285,50, y=39,00, z=-771,50], bdf['totalnoob43'/200, l='MpServer', x=267,17, y=69,62, z=-773,94], tv['Zombie'/342, l='MpServer', x=276,00, y=70,00, z=-784,31], te['Creeper'/201, l='MpServer', x=259,56, y=44,00, z=-783,97], tq['Skeleton'/202, l='MpServer', x=256,44, y=65,00, z=-769,50], te['Creeper'/346, l='MpServer', x=283,50, y=40,00, z=-753,50], tv['Zombie'/345, l='MpServer', x=281,69, y=44,00, z=-755,13], te['Creeper'/344, l='MpServer', x=281,75, y=34,00, z=-779,16], ry['Sheep'/334, l='MpServer', x=263,81, y=68,00, z=-755,72], ry['Sheep'/335, l='MpServer', x=264,56, y=68,00, z=-766,34], tq['Skeleton'/332, l='MpServer', x=266,50, y=39,00, z=-755,50], ry['Sheep'/333, l='MpServer', x=262,19, y=68,00, z=-753,59], tq['Skeleton'/331, l='MpServer', x=265,50, y=39,00, z=-754,50], ts['Spider'/311, l='MpServer', x=255,50, y=39,00, z=-790,50], ts['Spider'/310, l='MpServer', x=255,50, y=39,00, z=-794,50], st['entity.MinecartChest.name'/313, l='MpServer', x=247,50, y=40,50, z=-777,50], st['entity.MinecartChest.name'/312, l='MpServer', x=255,50, y=40,50, z=-770,50], tf['Enderman'/315, l='MpServer', x=246,31, y=64,00, z=-761,38], st['entity.MinecartChest.name'/314, l='MpServer', x=249,50, y=43,50, z=-755,50], tq['Skeleton'/317, l='MpServer', x=242,50, y=64,00, z=-749,50], ry['Sheep'/316, l='MpServer', x=246,09, y=64,00, z=-765,94], tr['Slime'/356, l='MpServer', x=300,16, y=34,00, z=-776,31], tv['Zombie'/357, l='MpServer', x=290,50, y=34,00, z=-778,50], tv['Zombie'/358, l='MpServer', x=290,50, y=34,00, z=-777,50], ts['Spider'/359, l='MpServer', x=294,50, y=65,00, z=-741,66], te['Creeper'/297, l='MpServer', x=227,50, y=38,00, z=-782,50], tv['Zombie'/298, l='MpServer', x=230,50, y=38,00, z=-783,50], tv['Zombie'/360, l='MpServer', x=301,50, y=64,00, z=-744,50]]
	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 7 (x86) version 6.1
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 17892960 bytes (17 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: 21635 (1211560 bytes; 1 MB) allocated, 21635 (1211560 bytes; 1 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 71
	Launched Version: 1.6.2
	LWJGL: 2.9.0
	OpenGL: GeForce GTX 460/PCIe/SSE2 GL version 4.3.0, NVIDIA Corporation
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Pack: [1.6.2]_R3D.CRAFT_Default_Realism_512x_v0.1.1.zip
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 29 (1624 bytes; 0 MB) allocated, 29 (1624 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-22380/479988/