Hopper: java.lang.ArrayIndexOutOfBoundsException: 4

java.lang.ArrayIndexOutOfBoundsException: 4
	at bfl.a(SourceFile:601)
	at bfl.a(SourceFile:536)
	at bfe.a(SourceFile:836)

---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 20-09-13 04:07 PM
Description: Unexpected error

java.lang.ArrayIndexOutOfBoundsException: 4
	at bfl.a(SourceFile:601)
	at bfl.a(SourceFile:536)
	at bfe.a(SourceFile:836)
	at bfe.b(SourceFile:695)
	at atv.S(SourceFile:686)
	at atv.d(SourceFile:619)
	at net.minecraft.client.main.Main.main(SourceFile:101)


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

-- Head --
Stacktrace:
	at bfl.a(SourceFile:601)
	at bfl.a(SourceFile:536)
	at bfe.a(SourceFile:836)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bdi['Player'/188, l='MpServer', x=159,89, y=59,03, z=-130,73]]
	Chunk stats: MultiplayerChunkCache: 441
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (216,64,-92), Chunk: (at 8,4,4 in 13,-6; contains blocks 208,0,-96 to 223,255,-81), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Level time: 109567 game time, 122670 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: survival (ID 0). Hardcore: false. Cheats: false
	Forced entities: 93 total; [tw['Zombi'/14573, l='MpServer', x=142,50, y=12,00, z=-86,50], tr['Esqueleto'/10981, l='MpServer', x=156,50, y=23,00, z=-195,50], tr['Esqueleto'/4872, l='MpServer', x=193,88, y=68,00, z=-152,50], ss['item.item.bone'/791, l='MpServer', x=127,19, y=25,13, z=-126,38], ss['item.item.arrow'/789, l='MpServer', x=125,28, y=27,13, z=-126,06], tt['Araña'/17637, l='MpServer', x=116,72, y=36,00, z=-136,34], tr['Esqueleto'/18723, l='MpServer', x=186,50, y=16,00, z=-58,50], tr['Esqueleto'/33064, l='MpServer', x=113,50, y=16,00, z=-181,50], tw['Zombi'/34627, l='MpServer', x=152,42, y=16,00, z=-170,33], tw['Zombi'/34634, l='MpServer', x=148,50, y=25,00, z=-188,50], tr['Esqueleto'/34635, l='MpServer', x=146,50, y=25,00, z=-186,50], tf['Creeper'/13162, l='MpServer', x=185,03, y=36,00, z=-176,50], tw['Zombi'/34633, l='MpServer', x=149,50, y=25,00, z=-188,50], tr['Esqueleto'/14116, l='MpServer', x=142,50, y=13,00, z=-92,50], tt['Araña'/11438, l='MpServer', x=127,50, y=17,00, z=-196,50], tw['Zombi'/19056, l='MpServer', x=116,50, y=36,00, z=-138,50], sc['Calamar'/15613, l='MpServer', x=118,53, y=49,84, z=-83,56], ry['Cerdo'/76, l='MpServer', x=197,34, y=69,00, z=-178,53], tf['Creeper'/11725, l='MpServer', x=187,69, y=36,00, z=-171,75], sc['Calamar'/15612, l='MpServer', x=128,66, y=49,91, z=-77,84], tf['Creeper'/11724, l='MpServer', x=187,28, y=35,00, z=-168,00], sc['Calamar'/15614, l='MpServer', x=123,22, y=46,19, z=-85,41], tf['Creeper'/11726, l='MpServer', x=186,84, y=36,00, z=-172,69], sc['Calamar'/15611, l='MpServer', x=122,56, y=48,19, z=-82,91], tf['Creeper'/11723, l='MpServer', x=175,97, y=33,00, z=-164,53], sc['Calamar'/15610, l='MpServer', x=125,88, y=57,34, z=-71,06], sc['Calamar'/15588, l='MpServer', x=165,97, y=53,89, z=-117,33], sc['Calamar'/15586, l='MpServer', x=173,06, y=58,34, z=-98,84], sc['Calamar'/15587, l='MpServer', x=174,38, y=57,34, z=-103,37], tw['Zombi'/15258, l='MpServer', x=116,50, y=13,00, z=-153,50], tt['Araña'/19054, l='MpServer', x=118,50, y=36,00, z=-142,50], tw['Zombi'/19055, l='MpServer', x=115,50, y=36,00, z=-135,50], tr['Esqueleto'/23588, l='MpServer', x=162,66, y=30,00, z=-158,44], tr['Esqueleto'/23587, l='MpServer', x=168,46, y=29,00, z=-166,77], ro['Murciélago'/18110, l='MpServer', x=137,75, y=27,10, z=-182,59], tw['Zombi'/23586, l='MpServer', x=163,50, y=30,00, z=-162,84], ro['Murciélago'/18111, l='MpServer', x=140,53, y=24,06, z=-178,40], tw['Zombi'/23585, l='MpServer', x=159,50, y=30,00, z=-157,50], tr['Esqueleto'/8100, l='MpServer', x=203,88, y=64,00, z=-179,41], tr['Esqueleto'/8101, l='MpServer', x=194,56, y=64,00, z=-180,06], sc['Calamar'/15573, l='MpServer', x=98,50, y=49,31, z=-145,22], sc['Calamar'/15568, l='MpServer', x=147,12, y=49,38, z=-116,80], tr['Esqueleto'/17094, l='MpServer', x=125,59, y=30,00, z=-145,44], sc['Calamar'/15579, l='MpServer', x=145,78, y=61,34, z=-71,59], sc['Calamar'/15578, l='MpServer', x=139,88, y=61,34, z=-80,50], tg['Enderman'/19032, l='MpServer', x=142,31, y=12,00, z=-87,91], sc['Calamar'/15564, l='MpServer', x=158,19, y=49,34, z=-113,37], sc['Calamar'/15565, l='MpServer', x=146,85, y=47,62, z=-106,86], ro['Murciélago'/11839, l='MpServer', x=170,66, y=17,10, z=-159,25], tt['Araña'/14915, l='MpServer', x=126,06, y=30,32, z=-146,72], tr['Esqueleto'/31910, l='MpServer', x=120,50, y=28,00, z=-171,50], tf['Creeper'/14913, l='MpServer', x=119,50, y=36,00, z=-151,50], tf['Creeper'/15883, l='MpServer', x=163,50, y=18,00, z=-129,50], tr['Esqueleto'/10314, l='MpServer', x=173,50, y=14,00, z=-162,50], sc['Calamar'/15625, l='MpServer', x=114,81, y=46,13, z=-100,19], sc['Calamar'/15617, l='MpServer', x=150,20, y=56,05, z=-129,51], sc['Calamar'/15616, l='MpServer', x=140,58, y=60,72, z=-135,38], sc['Calamar'/15618, l='MpServer', x=159,11, y=56,30, z=-128,62], tw['Zombi'/13699, l='MpServer', x=117,50, y=25,00, z=-164,50], ro['Murciélago'/15375, l='MpServer', x=108,53, y=14,82, z=-180,53], tr['Esqueleto'/20737, l='MpServer', x=122,94, y=34,26, z=-148,50], ro['Murciélago'/14687, l='MpServer', x=158,75, y=31,67, z=-147,50], tr['Esqueleto'/15905, l='MpServer', x=150,50, y=15,00, z=-166,50], tr['Esqueleto'/15906, l='MpServer', x=151,48, y=15,00, z=-169,59], tr['Esqueleto'/15111, l='MpServer', x=162,50, y=21,00, z=-152,69], ro['Murciélago'/30896, l='MpServer', x=113,42, y=21,31, z=-187,30], ro['Murciélago'/36650, l='MpServer', x=219,72, y=34,85, z=-61,06], ro['Murciélago'/36651, l='MpServer', x=220,00, y=35,32, z=-59,00], tf['Creeper'/15468, l='MpServer', x=189,00, y=36,00, z=-123,44], ro['Murciélago'/30895, l='MpServer', x=89,59, y=22,00, z=-167,82], tf['Creeper'/14370, l='MpServer', x=170,56, y=13,00, z=-159,03], tr['Esqueleto'/15467, l='MpServer', x=183,59, y=36,00, z=-117,94], tf['Creeper'/18638, l='MpServer', x=183,50, y=23,00, z=-120,50], tf['Creeper'/18208, l='MpServer', x=217,50, y=34,00, z=-66,50], bdi['Player'/188, l='MpServer', x=159,89, y=59,03, z=-130,73], tr['Esqueleto'/20409, l='MpServer', x=122,50, y=15,00, z=-154,50], tr['Esqueleto'/17970, l='MpServer', x=133,75, y=36,00, z=-117,66], tf['Creeper'/20410, l='MpServer', x=119,00, y=14,00, z=-152,50], tt['Araña'/17969, l='MpServer', x=132,94, y=36,00, z=-116,34], tr['Esqueleto'/17968, l='MpServer', x=131,50, y=36,00, z=-115,50], tw['Zombi'/17973, l='MpServer', x=139,50, y=18,00, z=-190,50], ss['item.item.rottenFlesh'/10221, l='MpServer', x=220,75, y=64,13, z=-192,63], tw['Zombi'/17972, l='MpServer', x=139,50, y=18,00, z=-189,50], tf['Creeper'/18682, l='MpServer', x=87,50, y=22,00, z=-168,50], tf['Creeper'/18207, l='MpServer', x=218,06, y=34,00, z=-60,28], tw['Zombi'/18686, l='MpServer', x=106,50, y=13,00, z=-181,50], tf['Creeper'/18206, l='MpServer', x=221,47, y=34,00, z=-67,00], ro['Murciélago'/3375, l='MpServer', x=185,22, y=37,10, z=-176,09], tf['Creeper'/18678, l='MpServer', x=122,50, y=33,00, z=-136,50], tr['Esqueleto'/16765, l='MpServer', x=189,50, y=25,00, z=-125,50], tr['Esqueleto'/17443, l='MpServer', x=171,50, y=18,81, z=-145,30], tw['Zombi'/14367, l='MpServer', x=177,31, y=12,00, z=-153,34], tf['Creeper'/17948, l='MpServer', x=95,50, y=15,00, z=-164,50]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bdd.a(SourceFile:284)
	at atv.b(SourceFile:1761)
	at atv.d(SourceFile:633)
	at net.minecraft.client.main.Main.main(SourceFile:101)

-- System Details --
Details:
	Minecraft Version: 1.6.4
	Operating System: Windows XP (x86) version 5.1
	Java Version: 1.7.0_40, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 117408304 bytes (111 MB) / 239570944 bytes (228 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 16279 (911624 bytes; 0 MB) allocated, 3 (168 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
	Launched Version: 1.6.4
	LWJGL: 2.9.0
	OpenGL: GeForce 9300 / nForce 730i/PCI/SSE2 GL version 2.1.2, NVIDIA Corporation
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Pack: Default
	Current Language: Español (España)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 3604 (201824 bytes; 0 MB) allocated, 27 (1512 bytes; 0 MB) used