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-467052/

Crash:

java.lang.IllegalArgumentException: n must be positive
	at java.util.Random.nextInt(Unknown Source)
	at agm.a(SourceFile:176)
	at agm.a(SourceFile:27)
	at agg.a(SourceFile:362)
	at ago.a(SourceFile:29)
	at apg.a(SourceFile:162)
	at mi.a(SourceFile:160)
	at aoj.a(SourceFile:775)
	at mi.c(SourceFile:95)
	at mh.<init>(SourceFile:31)
	at mg.a(SourceFile:212)
	at mg.d(SourceFile:346)
	at ld.d(SourceFile:215)
	at mx.a(SourceFile:280)
	at ir.a(SourceFile:137)
	at it.a(SourceFile:20)
	at ef.a(SourceFile:164)

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

---- Minecraft Crash Report ----
// Who set us up the TNT?

Time: 26/10/13 4:54 PM
Description: Ticking memory connection

java.lang.IllegalArgumentException: n must be positive
	at java.util.Random.nextInt(Unknown Source)
	at agm.a(SourceFile:176)
	at agm.a(SourceFile:27)
	at agg.a(SourceFile:362)
	at ago.a(SourceFile:29)
	at apg.a(SourceFile:162)
	at mi.a(SourceFile:160)
	at aoj.a(SourceFile:775)
	at mi.c(SourceFile:95)
	at mh.<init>(SourceFile:31)
	at mg.a(SourceFile:212)
	at mg.d(SourceFile:346)
	at ld.d(SourceFile:215)
	at mx.a(SourceFile:280)
	at ir.a(SourceFile:137)
	at it.a(SourceFile:20)
	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 java.util.Random.nextInt(Unknown Source)
	at agm.a(SourceFile:176)
	at agm.a(SourceFile:27)
	at agg.a(SourceFile:362)
	at ago.a(SourceFile:29)
	at apg.a(SourceFile:162)
	at mi.a(SourceFile:160)
	at aoj.a(SourceFile:775)
	at mi.c(SourceFile:95)
	at mh.<init>(SourceFile:31)
	at mg.a(SourceFile:212)
	at mg.d(SourceFile:346)
	at ld.d(SourceFile:215)
	at mx.a(SourceFile:280)
	at ir.a(SourceFile:137)
	at it.a(SourceFile:20)
	at ef.a(SourceFile:164)

-- Ticking connection --
Details:
	Connection: ef@3035a
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_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 24213944 bytes (23 MB) / 132558848 bytes (126 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 800 (44800 bytes; 0 MB) allocated, 465 (26040 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 93 (5208 bytes; 0 MB) allocated, 69 (3864 bytes; 0 MB) used
	Player Count: 1 / 8; [mm['Toolbox999'/58, l='1.7 test', x=-986.41, y=11.00, z=1583.90]]
	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-467052/21630262/