Hopper: java.lang.ArrayIndexOutOfBoundsException: 6

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-467981/

Crash:

java.lang.ArrayIndexOutOfBoundsException: 6
	at aoc.a(SourceFile:40)
	at mn.d(SourceFile:171)
	at mn.b(SourceFile:198)
	at mn.a(SourceFile:110)
	at mx.a(SourceFile:336)
	at iw.a(SourceFile:53)
	at iw.a(SourceFile:8)
	at ef.a(SourceFile:164)

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

---- Minecraft Crash Report ----
// Don't do that.

Time: 10/26/13 11:46 AM
Description: Ticking memory connection

java.lang.ArrayIndexOutOfBoundsException: 7
	at aoc.a(SourceFile:40)
	at mn.d(SourceFile:171)
	at mn.b(SourceFile:198)
	at mn.a(SourceFile:110)
	at mx.a(SourceFile:336)
	at iw.a(SourceFile:53)
	at iw.a(SourceFile:8)
	at ef.a(SourceFile:164)
	at ms.c(SourceFile:134)
	at net.minecraft.server.MinecraftServer.u(SourceFile:529)
	at net.minecraft.server.MinecraftServer.t(SourceFile:441)
	at bsk.t(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:358)
	at ky.run(SourceFile:617)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at aoc.a(SourceFile:40)
	at mn.d(SourceFile:171)
	at mn.b(SourceFile:198)
	at mn.a(SourceFile:110)
	at mx.a(SourceFile:336)
	at iw.a(SourceFile:53)
	at iw.a(SourceFile:8)
	at ef.a(SourceFile:164)

-- Ticking connection --
Details:
	Connection: ef@4a32a3
Stacktrace:
	at ms.c(SourceFile:134)
	at net.minecraft.server.MinecraftServer.u(SourceFile:529)
	at net.minecraft.server.MinecraftServer.t(SourceFile:441)
	at bsk.t(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:358)
	at ky.run(SourceFile:617)

-- System Details --
Details:
	Minecraft Version: 1.7.2
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_45, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 72965504 bytes (69 MB) / 320610304 bytes (305 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 3700 (207200 bytes; 0 MB) allocated, 3251 (182056 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 7712 (431872 bytes; 0 MB) allocated, 5011 (280616 bytes; 0 MB) used
	Player Count: 1 / 8; [mm['Thebigcheese5_1'/4420225, l='Fun', x=255.31, y=64.00, z=336.28]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-467981/21844403/