Hopper: java.lang.IncompatibleClassChangeError: Class java.util.ArrayList does not implement the requested interface aew

java.lang.IncompatibleClassChangeError: Class java.util.ArrayList does not implement the requested interface aew
	at act.e(SourceFile:311)
	at adj.<init>(SourceFile:32)
	at bhk.a(SourceFile:114)
	at bhv.a(SourceFile:1151)
	at bho.a(SourceFile:817)

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 6/09/13 08:39 PM
Description: Unexpected error

java.lang.IncompatibleClassChangeError: Class java.util.ArrayList does not implement the requested interface aew
	at act.e(SourceFile:311)
	at adj.<init>(SourceFile:32)
	at bhk.a(SourceFile:114)
	at bhv.a(SourceFile:1151)
	at bho.a(SourceFile:817)
	at bho.b(SourceFile:697)
	at awb.V(SourceFile:713)
	at awb.e(SourceFile:642)
	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 act.e(SourceFile:311)
	at adj.<init>(SourceFile:32)
	at bhk.a(SourceFile:114)
	at bhv.a(SourceFile:1151)
	at bho.a(SourceFile:817)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bfn['ponki3'/15, l='MpServer', x=-392.48, y=70.62, z=-227.37]]
	Chunk stats: MultiplayerChunkCache: 291, 291
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (59,64,-67), Chunk: (at 11,4,13 in 3,-5; contains blocks 48,0,-80 to 63,255,-65), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Level time: 7329 game time, 7329 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: 82 total; [un['Zombi'/39059, l='MpServer', x=-322.50, y=20.00, z=-148.50], un['Zombi'/42752, l='MpServer', x=-411.50, y=42.00, z=-257.50], sd['Murciélago'/42833, l='MpServer', x=-441.23, y=15.69, z=-262.83], sd['Murciélago'/42846, l='MpServer', x=-476.18, y=30.95, z=-165.99], sd['Murciélago'/33124, l='MpServer', x=-390.77, y=20.10, z=-179.73], sd['Murciélago'/33127, l='MpServer', x=-383.25, y=22.10, z=-183.25], sd['Murciélago'/38109, l='MpServer', x=-390.25, y=57.10, z=-224.75], tj['item.item.seeds'/39038, l='MpServer', x=-390.31, y=69.13, z=-226.25], un['Zombi'/37090, l='MpServer', x=-387.94, y=58.00, z=-218.50], un['Zombi'/37091, l='MpServer', x=-380.50, y=52.00, z=-220.97], un['Zombi'/37089, l='MpServer', x=-381.02, y=53.00, z=-216.47], bfn['ponki3'/15, l='MpServer', x=-392.48, y=70.62, z=-227.37], sf['Pollo'/37117, l='MpServer', x=-316.53, y=64.00, z=-302.59], sf['Pollo'/31674, l='MpServer', x=-437.34, y=64.00, z=-247.53], sf['Pollo'/31673, l='MpServer', x=-432.25, y=67.00, z=-250.75], sf['Pollo'/31672, l='MpServer', x=-440.38, y=66.00, z=-258.44], sf['Pollo'/31671, l='MpServer', x=-432.50, y=67.00, z=-252.50], ui['Esqueleto'/38267, l='MpServer', x=-420.50, y=32.00, z=-244.50], sf['Pollo'/32808, l='MpServer', x=-460.50, y=64.00, z=-266.50], sf['Pollo'/32806, l='MpServer', x=-461.50, y=63.00, z=-271.50], sf['Pollo'/32807, l='MpServer', x=-461.50, y=64.00, z=-269.50], sf['Pollo'/32805, l='MpServer', x=-460.47, y=64.00, z=-261.53], sf['Pollo'/32840, l='MpServer', x=-407.50, y=66.00, z=-264.50], sf['Pollo'/32841, l='MpServer', x=-406.50, y=66.00, z=-269.50], tw['Creeper'/41510, l='MpServer', x=-349.50, y=13.00, z=-303.50], sf['Pollo'/32838, l='MpServer', x=-409.84, y=66.00, z=-265.50], sf['Pollo'/32839, l='MpServer', x=-409.25, y=66.00, z=-265.47], uk['Araña'/41527, l='MpServer', x=-413.00, y=12.00, z=-224.16], un['Zombi'/37214, l='MpServer', x=-386.50, y=20.00, z=-182.50], sf['Pollo'/29352, l='MpServer', x=-383.56, y=77.00, z=-224.56], sf['Pollo'/29353, l='MpServer', x=-385.56, y=78.00, z=-225.70], tj['item.tile.mushroom'/29354, l='MpServer', x=-335.13, y=39.13, z=-226.19], tj['item.item.seeds'/29355, l='MpServer', x=-335.44, y=39.13, z=-226.44], tj['item.tile.mushroom'/29356, l='MpServer', x=-335.13, y=39.13, z=-217.13], tj['item.item.seeds'/29357, l='MpServer', x=-337.16, y=39.13, z=-228.63], tw['Creeper'/38171, l='MpServer', x=-419.69, y=24.00, z=-231.44], sf['Pollo'/29346, l='MpServer', x=-382.87, y=69.00, z=-218.48], tw['Creeper'/38174, l='MpServer', x=-376.00, y=59.00, z=-246.50], uk['Araña'/38175, l='MpServer', x=-374.28, y=60.22, z=-244.61], sf['Pollo'/29350, l='MpServer', x=-374.50, y=84.00, z=-228.50], sf['Pollo'/29351, l='MpServer', x=-365.53, y=88.00, z=-238.47], tw['Creeper'/38368, l='MpServer', x=-347.50, y=16.00, z=-210.50], un['Zombi'/38320, l='MpServer', x=-337.50, y=13.00, z=-190.50], sd['Murciélago'/40241, l='MpServer', x=-367.25, y=24.85, z=-191.58], un['Zombi'/42751, l='MpServer', x=-413.50, y=42.00, z=-257.50], sr['Calamar'/38291, l='MpServer', x=-437.06, y=58.06, z=-198.25], sr['Calamar'/38290, l='MpServer', x=-436.34, y=59.08, z=-206.56], tw['Creeper'/37381, l='MpServer', x=-401.50, y=17.00, z=-178.50], tx['Enderman'/37382, l='MpServer', x=-398.50, y=17.00, z=-180.50], so['Oveja'/34626, l='MpServer', x=-367.47, y=69.00, z=-282.50], so['Oveja'/34627, l='MpServer', x=-368.28, y=67.00, z=-283.50], so['Oveja'/34625, l='MpServer', x=-364.50, y=72.00, z=-281.50], so['Oveja'/34628, l='MpServer', x=-368.66, y=69.00, z=-282.50], sd['Murciélago'/42282, l='MpServer', x=-315.34, y=25.04, z=-172.28], tw['Creeper'/38521, l='MpServer', x=-341.00, y=12.00, z=-294.50], uk['Araña'/41240, l='MpServer', x=-391.09, y=21.00, z=-192.41], tw['Creeper'/40607, l='MpServer', x=-411.50, y=51.00, z=-278.50], un['Zombi'/41235, l='MpServer', x=-389.50, y=21.00, z=-193.50], un['Zombi'/41236, l='MpServer', x=-389.75, y=21.00, z=-192.50], un['Zombi'/41238, l='MpServer', x=-394.31, y=21.00, z=-192.31], tw['Creeper'/38436, l='MpServer', x=-361.50, y=32.00, z=-194.50], tw['Creeper'/38445, l='MpServer', x=-345.50, y=17.00, z=-188.50], tw['Creeper'/40608, l='MpServer', x=-415.25, y=52.00, z=-287.16], sd['Murciélago'/42395, l='MpServer', x=-364.63, y=24.46, z=-275.76], ui['Esqueleto'/37532, l='MpServer', x=-333.50, y=13.00, z=-188.50], tw['Creeper'/34787, l='MpServer', x=-393.50, y=21.00, z=-186.50], un['Zombi'/42427, l='MpServer', x=-421.50, y=25.00, z=-278.50], un['Zombi'/42428, l='MpServer', x=-421.50, y=25.00, z=-277.50], tw['Creeper'/38531, l='MpServer', x=-330.50, y=15.00, z=-193.50], un['Zombi'/42433, l='MpServer', x=-369.13, y=25.00, z=-188.56], un['Zombi'/42432, l='MpServer', x=-366.50, y=26.00, z=-191.50], tw['Creeper'/40480, l='MpServer', x=-467.50, y=58.00, z=-188.50], un['Zombi'/39823, l='MpServer', x=-349.50, y=17.00, z=-200.50], ui['Esqueleto'/39864, l='MpServer', x=-413.50, y=22.00, z=-231.50], ui['Esqueleto'/39886, l='MpServer', x=-345.50, y=23.00, z=-158.50], tx['Enderman'/43188, l='MpServer', x=-372.75, y=40.00, z=-160.34], ui['Esqueleto'/43189, l='MpServer', x=-371.50, y=40.00, z=-160.50], ui['Esqueleto'/43190, l='MpServer', x=-371.50, y=40.00, z=-162.50], ui['Esqueleto'/43191, l='MpServer', x=-368.50, y=40.00, z=-163.50], sd['Murciélago'/40785, l='MpServer', x=-337.49, y=43.86, z=-225.40], ui['Esqueleto'/41197, l='MpServer', x=-402.50, y=31.00, z=-235.50], un['Zombi'/39771, l='MpServer', x=-460.50, y=38.00, z=-170.50]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bfi.a(SourceFile:285)
	at awb.b(SourceFile:1813)
	at awb.e(SourceFile:656)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w36b
	Operating System: Windows 8 (amd64) version 6.2
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 665314504 bytes (634 MB) / 925564928 bytes (882 MB) up to 4772200448 bytes (4551 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx5G
	AABB Pool Size: 3564 (199584 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Launched Version: 13w36b
	LWJGL: 2.9.0
	OpenGL: Intel(R) HD Graphics GL version 3.1.0 - Build 9.17.10.2932, Intel
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: Español (México)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 876 (49056 bytes; 0 MB) allocated, 25 (1400 bytes; 0 MB) used