Hopper: java.lang.IndexOutOfBoundsException: Index: 49, Size: 45

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-197498/

Crash:

java.lang.IndexOutOfBoundsException: Index: 49, Size: 45
	at java.util.ArrayList.rangeCheck(Unknown Source)
	at java.util.ArrayList.get(Unknown Source)
	at vy.a(SourceFile:281)
	at bgb.a(SourceFile:296)
	at baq.a(SourceFile:490)
	at baq.a(SourceFile:514)
	at baq.a(SourceFile:499)
	at azq.n(SourceFile:258)
	at azq.m(SourceFile:217)

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

---- Minecraft Crash Report ----
// On the bright side, I bought you a teddy bear!

Time: 20/09/13 13:22
Description: Updating screen events

java.lang.IndexOutOfBoundsException: Index: 49, Size: 45
	at java.util.ArrayList.rangeCheck(Unknown Source)
	at java.util.ArrayList.get(Unknown Source)
	at vy.a(SourceFile:281)
	at bgb.a(SourceFile:296)
	at baq.a(SourceFile:490)
	at baq.a(SourceFile:514)
	at baq.a(SourceFile:499)
	at azq.n(SourceFile:258)
	at azq.m(SourceFile:217)
	at awp.o(SourceFile:1256)
	at awp.aa(SourceFile:726)
	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 vy.a(SourceFile:281)
	at bgb.a(SourceFile:296)
	at baq.a(SourceFile:490)
	at baq.a(SourceFile:514)
	at baq.a(SourceFile:499)
	at azq.n(SourceFile:258)
	at azq.m(SourceFile:217)

-- Affected screen --
Details:
	Screen name: ~~ERROR~~ NullPointerException: null

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bgh['CherishFalls'/284, l='MpServer', x=-2693,22, y=69,62, z=135,67]]
	Chunk stats: MultiplayerChunkCache: 225, 225
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-202,64,233), Chunk: (at 6,4,9 in -13,14; contains blocks -208,0,224 to -193,255,239), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 275712 game time, 275712 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: 20 total; [sn['Bat'/8532, l='MpServer', x=-2762,00, y=30,76, z=82,06], sn['Bat'/8531, l='MpServer', x=-2765,22, y=30,02, z=83,50], bgh['CherishFalls'/284, l='MpServer', x=-2693,22, y=69,62, z=135,67], sn['Bat'/8653, l='MpServer', x=-2621,60, y=25,06, z=94,92], sn['Bat'/8652, l='MpServer', x=-2620,73, y=25,06, z=94,90], sn['Bat'/8649, l='MpServer', x=-2618,13, y=25,00, z=94,63], sn['Bat'/8565, l='MpServer', x=-2613,50, y=19,10, z=172,25], sn['Bat'/8564, l='MpServer', x=-2614,25, y=18,76, z=171,06], sn['Bat'/8562, l='MpServer', x=-2614,25, y=17,00, z=171,75], sn['Bat'/8545, l='MpServer', x=-2647,54, y=18,83, z=179,24], tb['Squid'/7646, l='MpServer', x=-2663,41, y=53,03, z=195,94], tb['Squid'/7347, l='MpServer', x=-2665,50, y=49,00, z=100,06], tv['entity.MinecartChest.name'/347, l='MpServer', x=-2633,50, y=25,50, z=171,50], pc['entity.ItemFrame.name'/322, l='MpServer', x=-2693,94, y=78,50, z=118,50], pc['entity.ItemFrame.name'/321, l='MpServer', x=-2703,06, y=74,50, z=116,50], sn['Bat'/8363, l='MpServer', x=-2662,28, y=18,70, z=189,56], sn['Bat'/7998, l='MpServer', x=-2628,22, y=29,23, z=62,28], tv['entity.MinecartChest.name'/358, l='MpServer', x=-2617,50, y=26,50, z=201,50], tv['entity.MinecartChest.name'/355, l='MpServer', x=-2623,50, y=25,50, z=179,50], sn['Bat'/8374, l='MpServer', x=-2621,25, y=21,10, z=184,75]]
	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 (x86) version 6.1
	Java Version: 1.7.0_21, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 95073656 bytes (90 MB) / 376778752 bytes (359 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 187 (10472 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	Launched Version: 13w38c
	LWJGL: 2.9.0
	OpenGL: AMD Radeon HD 6310 Graphics                                                   GL version 4.1.10367 Compatibility Profile Context, ATI Technologies Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: [The_End_is_Extremely_Nigh_v35_147-converted-1378373609390.zip, HRF_1.6.2_x64.zip]
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 286 (16016 bytes; 0 MB) allocated, 16 (896 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-197498/12634682/