Hopper: java.lang.ArrayIndexOutOfBoundsException: 915

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-397983/

Crash:

java.lang.ArrayIndexOutOfBoundsException: 915
	at azz.a(SourceFile:473)
	at azz.a(SourceFile:445)
	at bta.a(SourceFile:489)

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

---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 18/10/13 19:00
Description: Rendering screen

java.lang.ArrayIndexOutOfBoundsException: 915
	at azz.a(SourceFile:473)
	at azz.a(SourceFile:445)
	at bta.a(SourceFile:489)
	at blc.b(SourceFile:850)
	at ayw.ad(SourceFile:782)
	at ayw.e(SourceFile:706)
	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 azz.a(SourceFile:473)
	at azz.a(SourceFile:445)
	at bta.a(SourceFile:489)

-- Screen render details --
Details:
	Screen name: bta
	Mouse location: Scaled: (341, 21). Absolute: (682, 436)
	Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2
Stacktrace:
	at blc.b(SourceFile:850)
	at ayw.ad(SourceFile:782)
	at ayw.e(SourceFile:706)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w42b
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.6.0_24, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Sun Microsystems Inc.
	Memory: 38928128 bytes (37 MB) / 69746688 bytes (66 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 13w42b
	LWJGL: 2.9.0
	OpenGL: GeForce 610M/PCI/SSE2 GL version 4.2.0, NVIDIA Corporation
	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: ~~ERROR~~ NullPointerException: null
	Anisotropic Filtering: Off (1)

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-397983/19093760/