Hopper: java.lang.ArrayIndexOutOfBoundsException: 165762

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-139160/

Crash:

java.lang.ArrayIndexOutOfBoundsException: 165762
	at amw.a(SourceFile:159)

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

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

Time: 9/12/13 4:53 PM
Description: Comparing biomes

java.lang.ArrayIndexOutOfBoundsException: 155669
	at amw.a(SourceFile:159)
	at ana.a(SourceFile:67)
	at amz.a(SourceFile:13)
	at anl.a(SourceFile:20)
	at amk.a(SourceFile:16)
	at anl.a(SourceFile:20)
	at anf.a(SourceFile:13)
	at anl.a(SourceFile:20)
	at anl.a(SourceFile:20)
	at ang.a(SourceFile:15)
	at ane.a(SourceFile:24)
	at aef.a(SourceFile:120)
	at agl.a(SourceFile:90)
	at agl.d(SourceFile:189)
	at kk.c(SourceFile:72)
	at kk.d(SourceFile:104)
	at adc.e(SourceFile:311)
	at adc.a(SourceFile:232)
	at adq.b(SourceFile:85)
	at adq.a(SourceFile:50)
	at jf.a(SourceFile:438)
	at jf.a(SourceFile:368)
	at ko.b(SourceFile:347)
	at ok.A(SourceFile:318)
	at pc.A(SourceFile:167)
	at ok.h(SourceFile:281)
	at pc.h(SourceFile:1171)
	at ve.h(SourceFile:205)
	at ko.i(SourceFile:192)
	at kt.a(SourceFile:195)
	at gl.a(SourceFile:136)
	at dz.b(SourceFile:64)
	at kt.e(SourceFile:63)
	at kw.b(SourceFile:37)
	at bnz.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.u(SourceFile:482)
	at net.minecraft.server.MinecraftServer.t(SourceFile:399)
	at bnw.t(SourceFile:124)
	at net.minecraft.server.MinecraftServer.run(SourceFile:333)
	at ja.run(SourceFile:576)


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

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

-- Biomes being compared --
Details:
	Biome A ID: 155669
	Biome B ID: 38
	Biome A: ~~ERROR~~ ArrayIndexOutOfBoundsException: 155669
	Biome B: aep@2630a895
Stacktrace:
	at amw.a(SourceFile:159)
	at ana.a(SourceFile:67)
	at amz.a(SourceFile:13)
	at anl.a(SourceFile:20)
	at amk.a(SourceFile:16)
	at anl.a(SourceFile:20)
	at anf.a(SourceFile:13)
	at anl.a(SourceFile:20)
	at anl.a(SourceFile:20)
	at ang.a(SourceFile:15)
	at ane.a(SourceFile:24)
	at aef.a(SourceFile:120)
	at agl.a(SourceFile:90)
	at agl.d(SourceFile:189)

-- Chunk to be generated --
Details:
	Location: -8,-3
	Position hash: -8589934600
	Generator: RandomLevelSource
Stacktrace:
	at kk.c(SourceFile:72)
	at kk.d(SourceFile:104)
	at adc.e(SourceFile:311)

-- Requested block coordinates --
Details:
	Found chunk: true
	Location: World: (-120,255,-48), Chunk: (at 8,15,0 in -8,-3; contains blocks -128,0,-48 to -113,255,-33), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Stacktrace:
	at adc.a(SourceFile:232)
	at adq.b(SourceFile:85)
	at adq.a(SourceFile:50)
	at jf.a(SourceFile:438)
	at jf.a(SourceFile:368)
	at ko.b(SourceFile:347)
	at ok.A(SourceFile:318)
	at pc.A(SourceFile:167)
	at ok.h(SourceFile:281)
	at pc.h(SourceFile:1171)
	at ve.h(SourceFile:205)

-- Player being ticked --
Details:
	Entity Type: null (ko)
	Entity ID: 2
	Entity Name: aknutli
	Entity's Exact location: 8.00, 52.01, -34.00
	Entity's Block location: World: (8,52,-34), Chunk: (at 8,3,14 in 0,-3; contains blocks 0,0,-48 to 15,255,-33), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Entity's Momentum: 0.00, 0.00, 0.00
Stacktrace:
	at ko.i(SourceFile:192)
	at kt.a(SourceFile:195)
	at gl.a(SourceFile:136)
	at dz.b(SourceFile:64)
	at kt.e(SourceFile:63)

-- Ticking connection --
Details:
	Connection: kt@27d8bad2
Stacktrace:
	at kw.b(SourceFile:37)
	at bnz.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.u(SourceFile:482)
	at net.minecraft.server.MinecraftServer.t(SourceFile:399)
	at bnw.t(SourceFile:124)
	at net.minecraft.server.MinecraftServer.run(SourceFile:333)
	at ja.run(SourceFile:576)

-- System Details --
Details:
	Minecraft Version: 13w37a
	Operating System: Mac OS X (x86_64) version 10.7.5
	Java Version: 1.6.0_35, Apple Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
	Memory: 37011144 bytes (35 MB) / 254930944 bytes (243 MB) up to 1065025536 bytes (1015 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 2809 (157304 bytes; 0 MB) allocated, 2721 (152376 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 12, allocated: 13, tallocated: 95
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 364 (20384 bytes; 0 MB) allocated, 321 (17976 bytes; 0 MB) used
	Player Count: 1 / 8; [ko['aknutli'/2, l='New World', x=8.00, y=52.01, z=-34.00]]
	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-139160/10192289/