Hopper: java.lang.ArrayIndexOutOfBoundsException: 899

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-205044/

Crash:

java.lang.ArrayIndexOutOfBoundsException: 899
	at adp.a(SourceFile:26)
	at ads.b(SourceFile:75)
	at adr.c(SourceFile:326)
	at abw.h(SourceFile:341)
	at abw.w(SourceFile:1719)
	at aci.a(SourceFile:152)
	at aci.a(SourceFile:100)
	at js.b(SourceFile:107)

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

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

Time: 9/22/13 5:38 PM
Description: Exception ticking world

java.lang.ArrayIndexOutOfBoundsException: 114
	at adp.a(SourceFile:26)
	at ads.b(SourceFile:75)
	at adr.c(SourceFile:326)
	at abw.h(SourceFile:341)
	at abw.w(SourceFile:1719)
	at aci.a(SourceFile:152)
	at aci.a(SourceFile:100)
	at js.b(SourceFile:107)
	at net.minecraft.server.MinecraftServer.t(SourceFile:463)
	at net.minecraft.server.MinecraftServer.s(SourceFile:406)
	at bkz.s(SourceFile:124)
	at net.minecraft.server.MinecraftServer.run(SourceFile:340)
	at hi.run(SourceFile:583)


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

-- Head --
Stacktrace:
	at adp.a(SourceFile:26)
	at ads.b(SourceFile:75)
	at adr.c(SourceFile:326)
	at abw.h(SourceFile:341)
	at abw.w(SourceFile:1719)
	at aci.a(SourceFile:152)
	at aci.a(SourceFile:100)
	at js.b(SourceFile:107)

-- Affected level --
Details:
	Level name: Super Flat/Redstone Mechanics
	All players: 1 total; [jv['12Cam345'/111, l='Super Flat/Redstone Mechanics', x=656.40, y=4.00, z=127.52]]
	Chunk stats: ServerChunkCache: 724 Drop: 0
	Level seed: -8442807046467718276
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 
	Level spawn location: World: (722,4,195), Chunk: (at 2,0,3 in 45,12; contains blocks 720,0,192 to 735,255,207), Region: (1,0; contains chunks 32,0 to 63,31, blocks 512,0,0 to 1023,255,511)
	Level time: 1231864 game time, 0 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 2744170 (now: false), thunder time: 2744170 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.t(SourceFile:463)
	at net.minecraft.server.MinecraftServer.s(SourceFile:406)
	at bkz.s(SourceFile:124)
	at net.minecraft.server.MinecraftServer.run(SourceFile:340)
	at hi.run(SourceFile:583)

-- System Details --
Details:
	Minecraft Version: 1.6.4
	Operating System: Mac OS X (x86_64) version 10.6.8
	Java Version: 1.6.0_51, Apple Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
	Memory: 107023728 bytes (102 MB) / 277151744 bytes (264 MB) up to 1069416448 bytes (1019 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 1583 (88648 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 198 (11088 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Player Count: 1 / 8; [jv['12Cam345'/111, l='Super Flat/Redstone Mechanics', x=656.40, y=4.00, z=127.52]]
	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-205044/13602114/