Hopper: java.lang.ArrayIndexOutOfBoundsException: 6

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-465837/

Crash:

java.lang.ArrayIndexOutOfBoundsException: 6
	at aob.a(SourceFile:205)
	at mj.a(SourceFile:714)
	at mj.Z(SourceFile:703)
	at mj.b(SourceFile:152)

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

---- Minecraft Crash Report ----
// I let you down. Sorry :(

Time: 10/25/13 12:50 PM
Description: Exception ticking world

java.lang.ArrayIndexOutOfBoundsException: 6
	at aob.a(SourceFile:205)
	at mj.a(SourceFile:714)
	at mj.Z(SourceFile:703)
	at mj.b(SourceFile:152)
	at net.minecraft.server.MinecraftServer.u(SourceFile:503)
	at net.minecraft.server.MinecraftServer.t(SourceFile:441)
	at bsk.t(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:358)
	at ky.run(SourceFile:617)


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

-- Head --
Stacktrace:
	at aob.a(SourceFile:205)
	at mj.a(SourceFile:714)
	at mj.Z(SourceFile:703)
	at mj.b(SourceFile:152)

-- Affected level --
Details:
	Level name: C V
	All players: 2 total; [mm['tmarks11'/17026042, l='C V', x=10.49, y=64.37, z=-176.24], mm['KatieLM11'/17140662, l='C V', x=-41.96, y=62.59, z=-197.58]]
	Chunk stats: ServerChunkCache: 564 Drop: 0
	Level seed: 5626356836548801710
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 2;7,59x1,3x3,2;1;stronghold,biome_1,village,decoration,dungeon,lake,mineshaft,lava_lake
	Level spawn location: World: (71,4,-235), Chunk: (at 7,0,5 in 4,-15; contains blocks 64,0,-240 to 79,255,-225), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Level time: 2137884 game time, 1308828 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 92901 (now: false), thunder time: 99843 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.u(SourceFile:503)
	at net.minecraft.server.MinecraftServer.t(SourceFile:441)
	at bsk.t(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:358)
	at ky.run(SourceFile:617)

-- System Details --
Details:
	Minecraft Version: 1.7.2
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_05, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 1507569016 bytes (1437 MB) / 2066415616 bytes (1970 MB) up to 2066415616 bytes (1970 MB)
	JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2048M -Xms2048M
	AABB Pool Size: 1104 (61824 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 185 (10360 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Player Count: 2 / 8; [mm['tmarks11'/17026042, l='C V', x=10.49, y=64.37, z=-176.24], mm['KatieLM11'/17140662, l='C V', x=-41.96, y=62.59, z=-197.58]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-465837/21477786/