Hopper: java.lang.IllegalArgumentException: n must be positive

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-4066/

Crash:

java.lang.IllegalArgumentException: n must be positive
	at java.util.Random.nextInt(Unknown Source)
	at aav.a(SourceFile:144)
	at oe.c(SourceFile:800)
	at ue.d(SourceFile:737)
	at oe.a(SourceFile:570)
	at ue.a(SourceFile:694)
	at ju.a(SourceFile:262)
	at oe.b(SourceFile:741)
	at ue.b(SourceFile:1309)
	at nm.a(SourceFile:701)
	at oe.a(SourceFile:153)
	at ju.b(SourceFile:346)
	at jz.a(SourceFile:268)
	at et.a(SourceFile:136)
	at cm.b(SourceFile:64)
	at jz.e(SourceFile:60)

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

---- Minecraft Crash Report ----
// My bad.

Time: 5/08/13 5:23 PM
Description: Ticking memory connection

java.lang.IllegalArgumentException: n must be positive
	at java.util.Random.nextInt(Unknown Source)
	at aav.a(SourceFile:144)
	at oe.c(SourceFile:800)
	at ue.d(SourceFile:737)
	at oe.a(SourceFile:570)
	at ue.a(SourceFile:694)
	at ju.a(SourceFile:262)
	at oe.b(SourceFile:741)
	at ue.b(SourceFile:1309)
	at nm.a(SourceFile:701)
	at oe.a(SourceFile:153)
	at ju.b(SourceFile:346)
	at jz.a(SourceFile:268)
	at et.a(SourceFile:136)
	at cm.b(SourceFile:64)
	at jz.e(SourceFile:60)
	at kc.b(SourceFile:37)
	at bkz.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.t(SourceFile:488)
	at net.minecraft.server.MinecraftServer.s(SourceFile:405)
	at bkw.s(SourceFile:124)
	at net.minecraft.server.MinecraftServer.run(SourceFile:339)
	at hh.run(SourceFile:582)


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

-- Head --
Stacktrace:
	at java.util.Random.nextInt(Unknown Source)
	at aav.a(SourceFile:144)
	at oe.c(SourceFile:800)
	at ue.d(SourceFile:737)
	at oe.a(SourceFile:570)
	at ue.a(SourceFile:694)
	at ju.a(SourceFile:262)
	at oe.b(SourceFile:741)
	at ue.b(SourceFile:1309)
	at nm.a(SourceFile:701)
	at oe.a(SourceFile:153)
	at ju.b(SourceFile:346)
	at jz.a(SourceFile:268)
	at et.a(SourceFile:136)
	at cm.b(SourceFile:64)
	at jz.e(SourceFile:60)

-- Ticking connection --
Details:
	Connection: jz@4b9ffccd
Stacktrace:
	at kc.b(SourceFile:37)
	at bkz.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.t(SourceFile:488)
	at net.minecraft.server.MinecraftServer.s(SourceFile:405)
	at bkw.s(SourceFile:124)
	at net.minecraft.server.MinecraftServer.run(SourceFile:339)
	at hh.run(SourceFile:582)

-- System Details --
Details:
	Minecraft Version: 1.6.2
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_21, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 163979288 bytes (156 MB) / 653328384 bytes (623 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 971 (54376 bytes; 0 MB) allocated, 939 (52584 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 89 (4984 bytes; 0 MB) allocated, 87 (4872 bytes; 0 MB) used
	Player Count: 1 / 8; [ju['supremeash12'/9, l='Pix', x=579.54, y=56.00, z=882.88]]
	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-4066/638158/