Hopper: java.lang.IndexOutOfBoundsException: Index: 4, Size: 4

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-199363/

Crash:

java.lang.IndexOutOfBoundsException: Index: 4, Size: 4
	at java.util.ArrayList.RangeCheck(Unknown Source)
	at java.util.ArrayList.get(Unknown Source)
	at bbo.a(SourceFile:102)
	at baq.a(SourceFile:78)
	at bbo.a(SourceFile:116)

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

---- Minecraft Crash Report ----
// Quite honestly, I wouldn't worry myself about that.

Time: 9/20/13 4:44 PM
Description: Rendering screen

java.lang.IndexOutOfBoundsException: Index: 9, Size: 9
	at java.util.ArrayList.RangeCheck(Unknown Source)
	at java.util.ArrayList.get(Unknown Source)
	at bbo.a(SourceFile:102)
	at baq.a(SourceFile:78)
	at bbo.a(SourceFile:116)
	at bii.b(SourceFile:844)
	at awp.aa(SourceFile:754)
	at awp.e(SourceFile:677)
	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 java.util.ArrayList.RangeCheck(Unknown Source)
	at java.util.ArrayList.get(Unknown Source)
	at bbo.a(SourceFile:102)
	at baq.a(SourceFile:78)
	at bbo.a(SourceFile:116)

-- Screen render details --
Details:
	Screen name: bbo
	Mouse location: Scaled: (289, 76). Absolute: (868, 538)
	Screen size: Scaled: (456, 256). Absolute: (1366, 768). Scale factor of 3

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bgh['Super_Snow'/15, l='MpServer', x=-44.71, y=57.62, z=137.66]]
	Chunk stats: MultiplayerChunkCache: 256, 256
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-52,4,128), Chunk: (at 12,0,0 in -4,8; contains blocks -64,0,128 to -49,255,143), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 373276 game time, 1000 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: true), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 16 total; [vc['Villager'/0, l='MpServer', x=-44.50, y=57.20, z=127.50], tz['entity.MinecartRideable.name'/1, l='MpServer', x=-44.50, y=57.50, z=127.50], vc['Villager'/2, l='MpServer', x=-46.50, y=56.20, z=136.31], bgh['Super_Snow'/15, l='MpServer', x=-44.71, y=57.62, z=137.66], tz['entity.MinecartRideable.name'/3, l='MpServer', x=-46.50, y=56.50, z=136.31], vc['Villager'/4, l='MpServer', x=-44.69, y=56.00, z=132.98], vc['Villager'/5, l='MpServer', x=-34.50, y=56.20, z=143.50], tz['entity.MinecartRideable.name'/6, l='MpServer', x=-34.50, y=56.50, z=143.50], vc['Villager'/7, l='MpServer', x=-43.22, y=56.00, z=132.31], vc['Villager'/8, l='MpServer', x=-42.50, y=56.20, z=136.25], tz['entity.MinecartRideable.name'/9, l='MpServer', x=-42.50, y=56.50, z=136.25], vc['Villager'/10, l='MpServer', x=-45.70, y=56.00, z=133.70], vc['Villager'/11, l='MpServer', x=-43.30, y=56.00, z=133.70], vc['Villager'/12, l='MpServer', x=-45.70, y=56.00, z=132.30], vc['Villager'/13, l='MpServer', x=-44.00, y=56.00, z=132.71], vc['Villager'/14, l='MpServer', x=-44.04, y=56.00, z=133.20]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bgc.a(SourceFile:297)
	at awp.b(SourceFile:1874)
	at awp.e(SourceFile:686)
	at net.minecraft.client.main.Main.main(SourceFile:104)

-- System Details --
Details:
	Minecraft Version: 13w38c
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.6.0_27, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
	Memory: 179096264 bytes (170 MB) / 594804736 bytes (567 MB) up to 2863333376 bytes (2730 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx3G
	AABB Pool Size: 280 (15680 bytes; 0 MB) allocated, 226 (12656 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 13w38c
	LWJGL: 2.9.0
	OpenGL: Intel(R) HD Graphics Family GL version 3.1.0 - Build 8.15.10.2345, 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: 222 (12432 bytes; 0 MB) allocated, 101 (5656 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-199363/12729308/