Hopper: java.lang.ArrayIndexOutOfBoundsException: -12

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-191015/

Crash:

java.lang.ArrayIndexOutOfBoundsException: -12
	at b.a(SourceFile:330)
	at b.a(SourceFile:317)
	at bim.a(SourceFile:77)
	at bim.a(SourceFile:37)
	at ava.b(SourceFile:156)
	at ava.e(SourceFile:151)
	at ava.a(SourceFile:137)
	at ava.a(SourceFile:198)
	at awg.a(SourceFile:274)
	at auz.a(SourceFile:119)

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

---- Minecraft Crash Report ----
// Uh... Did I do that?

Time: 9/20/13 11:27 PM
Description: Rendering screen

java.lang.ArrayIndexOutOfBoundsException: -12
	at b.a(SourceFile:330)
	at b.a(SourceFile:317)
	at bim.a(SourceFile:77)
	at bim.a(SourceFile:37)
	at ava.b(SourceFile:156)
	at ava.e(SourceFile:151)
	at ava.a(SourceFile:137)
	at ava.a(SourceFile:198)
	at awg.a(SourceFile:274)
	at auz.a(SourceFile:119)
	at bfe.b(SourceFile:718)
	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 b.a(SourceFile:330)
	at b.a(SourceFile:317)
	at bim.a(SourceFile:77)
	at bim.a(SourceFile:37)
	at ava.b(SourceFile:156)
	at ava.e(SourceFile:151)
	at ava.a(SourceFile:137)
	at ava.a(SourceFile:198)
	at awg.a(SourceFile:274)
	at auz.a(SourceFile:119)

-- Screen render details --
Details:
	Screen name: auz
	Mouse location: Scaled: (285, 132). Absolute: (855, 503)
	Screen size: Scaled: (480, 300). Absolute: (1440, 900). Scale factor of 3
Stacktrace:
	at bfe.b(SourceFile:718)
	at atv.S(SourceFile:686)
	at atv.d(SourceFile:619)
	at net.minecraft.client.main.Main.main(SourceFile:101)

-- System Details --
Details:
	Minecraft Version: 1.6.4
	Operating System: Windows Vista (x86) version 6.0
	Java Version: 1.7.0_21, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 8635976 bytes (8 MB) / 518979584 bytes (494 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
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
	Launched Version: 1.6.4
	LWJGL: 2.9.0
	OpenGL: Intel Eaglelake GL version 2.0.0 - Build 7.15.10.1608, Intel
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Pack: Default
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-191015/12837484/