Hopper: java.lang.ArrayIndexOutOfBoundsException: 2049

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-190896/

Crash:

java.lang.ArrayIndexOutOfBoundsException: 2049
	at amz.a(SourceFile:159)

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

---- Minecraft Crash Report ----
// Would you like a cupcake?

Time: 19/09/13 1:01 PM
Description: Comparing biomes

java.lang.ArrayIndexOutOfBoundsException: 2563
	at amz.a(SourceFile:159)
	at and.a(SourceFile:67)
	at anc.a(SourceFile:13)
	at ano.a(SourceFile:20)
	at amn.a(SourceFile:16)
	at ano.a(SourceFile:20)
	at ani.a(SourceFile:13)
	at ano.a(SourceFile:20)
	at ano.a(SourceFile:20)
	at anj.a(SourceFile:15)
	at anh.a(SourceFile:24)
	at ann.a(SourceFile:23)
	at aeg.a(SourceFile:165)
	at aee.<init>(SourceFile:27)
	at aed.a(SourceFile:52)
	at aed.b(SourceFile:61)
	at aeg.a(SourceFile:61)
	at afj.a(SourceFile:926)
	at add.a(SourceFile:101)
	at add.a(SourceFile:1053)
	at big.i(SourceFile:1309)
	at big.a(SourceFile:904)
	at big.b(SourceFile:798)
	at awo.aa(SourceFile:758)
	at awo.e(SourceFile:681)
	at net.minecraft.client.main.Main.main(SourceFile:104)


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

-- Head --
Stacktrace:
	at amz.a(SourceFile:159)

-- Biomes being compared --
Details:
	Biome A ID: 2563
	Biome B ID: 38
	Biome A: ~~ERROR~~ ArrayIndexOutOfBoundsException: 2563
	Biome B: aeq@5b17b509
Stacktrace:
	at amz.a(SourceFile:159)
	at and.a(SourceFile:67)
	at anc.a(SourceFile:13)
	at ano.a(SourceFile:20)
	at amn.a(SourceFile:16)
	at ano.a(SourceFile:20)
	at ani.a(SourceFile:13)
	at ano.a(SourceFile:20)
	at ano.a(SourceFile:20)
	at anj.a(SourceFile:15)
	at anh.a(SourceFile:24)
	at ann.a(SourceFile:23)
	at aeg.a(SourceFile:165)
	at aee.<init>(SourceFile:27)
	at aed.a(SourceFile:52)
	at aed.b(SourceFile:61)
	at aeg.a(SourceFile:61)
	at afj.a(SourceFile:926)

-- Coordinates of biome request --
Details:
	Location: World: (8,0,8), Chunk: (at 8,0,8 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)
Stacktrace:
	at add.a(SourceFile:101)
	at add.a(SourceFile:1053)
	at big.i(SourceFile:1309)
	at big.a(SourceFile:904)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bgf['marmiketin'/536, l='MpServer', x=8.50, y=66.62, z=8.50]]
	Chunk stats: MultiplayerChunkCache: 0, 0
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-81,64,80), Chunk: (at 15,4,0 in -6,5; contains blocks -96,0,80 to -81,255,95), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 1592838 game time, 429595 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: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 1 total; [bgf['marmiketin'/536, 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 bga.a(SourceFile:294)
	at awo.b(SourceFile:1872)
	at awo.e(SourceFile:690)
	at net.minecraft.client.main.Main.main(SourceFile:104)

-- System Details --
Details:
	Minecraft Version: 13w38a
	Operating System: Windows 8 (amd64) version 6.2
	Java Version: 1.7.0_21, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 232096472 bytes (221 MB) / 354222080 bytes (337 MB) up to 5726666752 bytes (5461 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx6G
	AABB Pool Size: 10003 (560168 bytes; 0 MB) allocated, 10003 (560168 bytes; 0 MB) used
	IntCache: cache: 4, tcache: 83, allocated: 12, tallocated: 94
	Launched Version: 13w38a
	LWJGL: 2.9.0
	OpenGL: AMD Radeon HD 7570 GL version 4.2.11774 Compatibility Profile Context, ATI Technologies Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: Canadian English (CA)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 12 (672 bytes; 0 MB) allocated, 12 (672 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-190896/12383856/