Hopper: java.lang.ArrayIndexOutOfBoundsException: 6

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-146284/

Crash:

java.lang.ArrayIndexOutOfBoundsException: 6
	at aqn.a(SourceFile:151)
	at bio.a(SourceFile:3125)
	at bio.b(SourceFile:130)
	at bhw.a(SourceFile:158)
	at bih.a(SourceFile:1132)
	at bia.a(SourceFile:817)

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

---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 9/13/13 11:36 AM
Description: Unexpected error

java.lang.ArrayIndexOutOfBoundsException: 7
	at aqn.a(SourceFile:151)
	at bio.a(SourceFile:3125)
	at bio.b(SourceFile:130)
	at bhw.a(SourceFile:158)
	at bih.a(SourceFile:1132)
	at bia.a(SourceFile:817)
	at bia.b(SourceFile:695)
	at awo.V(SourceFile:717)
	at awo.e(SourceFile:646)
	at net.minecraft.client.main.Main.main(SourceFile:103)


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

-- Head --
Stacktrace:
	at aqn.a(SourceFile:151)
	at bio.a(SourceFile:3125)
	at bio.b(SourceFile:130)
	at bhw.a(SourceFile:158)
	at bih.a(SourceFile:1132)
	at bia.a(SourceFile:817)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bfz['Aerotactics'/944647, l='MpServer', x=240.43, y=77.62, z=60.27]]
	Chunk stats: MultiplayerChunkCache: 255, 255
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (248,64,72), Chunk: (at 8,4,8 in 15,4; contains blocks 240,0,64 to 255,255,79), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 297 game time, 297 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: 89 total; [sm['Bat'/944780, l='MpServer', x=195.11, y=45.80, z=46.86], sm['Bat'/944781, l='MpServer', x=197.10, y=43.27, z=31.46], ur['Skeleton'/944815, l='MpServer', x=206.50, y=14.00, z=5.50], ur['Skeleton'/944859, l='MpServer', x=312.50, y=28.00, z=69.50], sm['Bat'/949231, l='MpServer', x=171.34, y=14.00, z=47.72], sm['Bat'/949238, l='MpServer', x=314.33, y=29.58, z=123.81], sm['Bat'/944874, l='MpServer', x=162.54, y=32.97, z=119.52], sm['Bat'/944877, l='MpServer', x=195.82, y=50.03, z=57.03], bfz['Aerotactics'/944647, l='MpServer', x=240.43, y=77.62, z=60.27], sm['Bat'/944660, l='MpServer', x=174.69, y=34.04, z=130.15], sm['Bat'/944658, l='MpServer', x=175.67, y=32.06, z=128.78], sm['Bat'/944659, l='MpServer', x=182.96, y=35.78, z=119.52], uf['Creeper'/944648, l='MpServer', x=161.50, y=53.00, z=56.50], sm['Bat'/944693, l='MpServer', x=310.66, y=12.04, z=69.69], uf['Creeper'/944729, l='MpServer', x=167.50, y=20.00, z=31.50], uf['Creeper'/944730, l='MpServer', x=173.03, y=19.00, z=25.56], sm['Bat'/944760, l='MpServer', x=215.06, y=11.02, z=-6.11], sm['Bat'/944744, l='MpServer', x=249.79, y=25.89, z=39.65], uw['Zombie'/945028, l='MpServer', x=175.50, y=36.00, z=85.50], sm['Bat'/945048, l='MpServer', x=255.56, y=26.04, z=35.72], sx['Sheep'/944552, l='MpServer', x=302.75, y=71.00, z=-14.78], sx['Sheep'/944553, l='MpServer', x=301.53, y=78.00, z=-1.58], sx['Sheep'/944554, l='MpServer', x=301.56, y=73.00, z=-8.53], sx['Sheep'/944555, l='MpServer', x=299.16, y=72.00, z=-6.47], sw['Pig'/944556, l='MpServer', x=296.50, y=75.00, z=68.50], sw['Pig'/944557, l='MpServer', x=300.50, y=74.00, z=68.50], sw['Pig'/944558, l='MpServer', x=296.50, y=75.00, z=63.50], sw['Pig'/944559, l='MpServer', x=298.50, y=74.00, z=65.50], so['Chicken'/944561, l='MpServer', x=309.50, y=83.00, z=141.50], so['Chicken'/944560, l='MpServer', x=309.50, y=83.00, z=141.50], so['Chicken'/944562, l='MpServer', x=307.50, y=83.00, z=139.50], sw['Pig'/944565, l='MpServer', x=300.50, y=83.00, z=138.50], sw['Pig'/944564, l='MpServer', x=297.50, y=83.00, z=140.50], sw['Pig'/944566, l='MpServer', x=300.50, y=83.00, z=140.50], sx['Sheep'/944569, l='MpServer', x=315.50, y=72.00, z=69.50], sx['Sheep'/944568, l='MpServer', x=313.56, y=72.00, z=67.56], sx['Sheep'/944571, l='MpServer', x=313.50, y=72.00, z=66.47], sx['Sheep'/944570, l='MpServer', x=312.47, y=73.00, z=68.53], sp['Cow'/944504, l='MpServer', x=245.53, y=71.00, z=89.81], sp['Cow'/944505, l='MpServer', x=244.47, y=70.00, z=90.19], sp['Cow'/944506, l='MpServer', x=244.59, y=70.00, z=88.47], sp['Cow'/944507, l='MpServer', x=243.47, y=70.00, z=88.47], so['Chicken'/944500, l='MpServer', x=238.50, y=65.00, z=-4.50], sx['Sheep'/944501, l='MpServer', x=224.91, y=67.00, z=87.91], sx['Sheep'/944502, l='MpServer', x=236.50, y=63.00, z=90.50], sx['Sheep'/944503, l='MpServer', x=239.50, y=63.00, z=97.50], so['Chicken'/944497, l='MpServer', x=238.50, y=65.00, z=-6.50], so['Chicken'/944498, l='MpServer', x=238.50, y=65.00, z=-4.50], so['Chicken'/944499, l='MpServer', x=240.50, y=65.00, z=-1.50], sw['Pig'/944461, l='MpServer', x=162.50, y=64.00, z=14.50], sw['Pig'/944460, l='MpServer', x=160.50, y=64.00, z=10.50], so['Chicken'/944457, l='MpServer', x=161.50, y=65.00, z=6.50], so['Chicken'/944456, l='MpServer', x=164.50, y=65.00, z=5.50], so['Chicken'/944455, l='MpServer', x=163.50, y=65.00, z=4.50], so['Chicken'/944454, l='MpServer', x=162.50, y=65.00, z=7.50], so['Chicken'/944464, l='MpServer', x=160.50, y=64.00, z=60.50], ur['Skeleton'/945864, l='MpServer', x=299.50, y=27.00, z=78.50], ur['Skeleton'/945854, l='MpServer', x=295.50, y=19.00, z=46.50], ur['Skeleton'/945853, l='MpServer', x=297.50, y=19.00, z=46.50], ur['Skeleton'/945852, l='MpServer', x=294.50, y=19.00, z=44.50], ur['Skeleton'/945832, l='MpServer', x=214.50, y=54.00, z=39.50], ur['Skeleton'/945829, l='MpServer', x=208.50, y=54.00, z=39.50], uw['Zombie'/945826, l='MpServer', x=210.50, y=54.00, z=37.50], uw['Zombie'/945827, l='MpServer', x=215.13, y=54.00, z=34.53], ur['Skeleton'/945825, l='MpServer', x=187.53, y=43.00, z=22.06], ur['Skeleton'/945726, l='MpServer', x=160.50, y=22.00, z=65.50], ur['Skeleton'/945727, l='MpServer', x=160.50, y=22.00, z=63.50], ur['Skeleton'/945942, l='MpServer', x=175.50, y=32.00, z=135.50], uf['Creeper'/945943, l='MpServer', x=169.50, y=32.00, z=124.50], uf['Creeper'/945944, l='MpServer', x=166.25, y=32.00, z=123.69], uf['Creeper'/945972, l='MpServer', x=313.38, y=29.00, z=63.06], uf['Creeper'/945407, l='MpServer', x=233.00, y=63.00, z=49.59], ur['Skeleton'/945406, l='MpServer', x=232.31, y=63.00, z=50.69], uw['Zombie'/945405, l='MpServer', x=251.50, y=33.00, z=49.50], ts['item.item.seeds'/945336, l='MpServer', x=234.53, y=64.13, z=2.72], ur['Skeleton'/945291, l='MpServer', x=166.50, y=36.00, z=96.50], ur['Skeleton'/945206, l='MpServer', x=247.50, y=40.00, z=67.50], uf['Creeper'/945207, l='MpServer', x=243.44, y=39.00, z=64.31], ur['Skeleton'/945205, l='MpServer', x=244.31, y=40.00, z=67.25], uw['Zombie'/945174, l='MpServer', x=162.50, y=14.00, z=122.50], uw['Zombie'/945175, l='MpServer', x=163.50, y=14.00, z=119.50], uf['Creeper'/945176, l='MpServer', x=162.50, y=14.00, z=121.50], uf['Creeper'/945177, l='MpServer', x=166.50, y=14.00, z=121.50], ur['Skeleton'/945563, l='MpServer', x=167.25, y=30.60, z=115.76], ur['Skeleton'/945562, l='MpServer', x=160.94, y=31.00, z=123.47], ur['Skeleton'/945561, l='MpServer', x=165.50, y=32.00, z=120.50], ur['Skeleton'/945560, l='MpServer', x=166.50, y=32.00, z=121.50], ur['Skeleton'/945566, l='MpServer', x=319.50, y=51.00, z=4.50], uw['Zombie'/945556, l='MpServer', x=222.50, y=16.00, z=124.50]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bfu.a(SourceFile:285)
	at awo.b(SourceFile:1821)
	at awo.e(SourceFile:660)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w37b
	Operating System: Windows NT (unknown) (amd64) version 6.2
	Java Version: 1.7.0_01, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 227480488 bytes (216 MB) / 479068160 bytes (456 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 1102 (61712 bytes; 0 MB) allocated, 1083 (60648 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	Launched Version: 13w37b
	LWJGL: 2.9.0
	OpenGL: Intel(R) HD Graphics GL version 3.1.0 - Build 9.17.10.2867, Intel
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 589 (32984 bytes; 0 MB) allocated, 214 (11984 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-146284/10522280/