Hopper: java.lang.ArrayIndexOutOfBoundsException: -5

java.lang.ArrayIndexOutOfBoundsException: -5
	at b.a(SourceFile:263)
	at afn.a(SourceFile:2553)
	at net.minecraft.server.MinecraftServer.u(SourceFile:506)
	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)

---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 10/25/13 4:41 PM
Description: Exception in server tick loop

java.lang.ArrayIndexOutOfBoundsException: -5
	at b.a(SourceFile:263)
	at afn.a(SourceFile:2553)
	at net.minecraft.server.MinecraftServer.u(SourceFile:506)
	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:
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-- System Details --
Details:
	Minecraft Version: 1.7.2
	Operating System: Linux (amd64) version 3.2.0-55-generic
	Java Version: 1.6.0_27, Sun Microsystems Inc.
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
	Memory: 126142432 bytes (120 MB) / 951058432 bytes (907 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 2481 (138936 bytes; 0 MB) allocated, 18 (1008 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 681 (38136 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Player Count: 1 / 8; [mm['JoshuaThomasMad'/1137013, l='New World', x=40.68, y=-286.33, z=308.35]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.