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-705776/

Crash:

java.lang.IllegalArgumentException: n must be positive
	at java.util.Random.nextInt(Unknown Source)
	at agq.a(SourceFile:122)
	at agq.a(SourceFile:27)
	at agk.a(SourceFile:364)
	at ahf.a(SourceFile:74)
	at app.a(SourceFile:432)
	at ml.a(SourceFile:160)
	at aon.a(SourceFile:781)
	at ml.c(SourceFile:95)
	at mk.<init>(SourceFile:31)
	at mj.a(SourceFile:212)
	at mj.a(SourceFile:249)
	at lg.a(SourceFile:155)
	at lg.c(SourceFile:206)
	at lg.a(SourceFile:100)
	at ng.c(SourceFile:87)
	at ng.a(SourceFile:52)
	at ef.a(SourceFile:166)

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

---- Minecraft Crash Report ----
// I feel sad now :(

Time: 11/26/13 4:21 PM
Description: Ticking memory connection

java.lang.IllegalArgumentException: n must be positive
	at java.util.Random.nextInt(Unknown Source)
	at agq.a(SourceFile:122)
	at agq.a(SourceFile:27)
	at agk.a(SourceFile:364)
	at ahf.a(SourceFile:74)
	at app.a(SourceFile:432)
	at ml.a(SourceFile:160)
	at aon.a(SourceFile:781)
	at ml.c(SourceFile:95)
	at mk.<init>(SourceFile:31)
	at mj.a(SourceFile:212)
	at mj.a(SourceFile:249)
	at lg.a(SourceFile:155)
	at lg.c(SourceFile:206)
	at lg.a(SourceFile:100)
	at ng.c(SourceFile:87)
	at ng.a(SourceFile:52)
	at ef.a(SourceFile:166)
	at mv.c(SourceFile:134)
	at net.minecraft.server.MinecraftServer.u(SourceFile:528)
	at net.minecraft.server.MinecraftServer.t(SourceFile:440)
	at bth.t(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:357)
	at lb.run(SourceFile:616)


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 agq.a(SourceFile:122)
	at agq.a(SourceFile:27)
	at agk.a(SourceFile:364)
	at ahf.a(SourceFile:74)
	at app.a(SourceFile:432)
	at ml.a(SourceFile:160)
	at aon.a(SourceFile:781)
	at ml.c(SourceFile:95)
	at mk.<init>(SourceFile:31)
	at mj.a(SourceFile:212)
	at mj.a(SourceFile:249)
	at lg.a(SourceFile:155)
	at lg.c(SourceFile:206)
	at lg.a(SourceFile:100)
	at ng.c(SourceFile:87)
	at ng.a(SourceFile:52)
	at ef.a(SourceFile:166)

-- Ticking connection --
Details:
	Connection: ef@1dc64f9
Stacktrace:
	at mv.c(SourceFile:134)
	at net.minecraft.server.MinecraftServer.u(SourceFile:528)
	at net.minecraft.server.MinecraftServer.t(SourceFile:440)
	at bth.t(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:357)
	at lb.run(SourceFile:616)

-- System Details --
Details:
	Minecraft Version: 13w48b
	Operating System: Windows Vista (x86) version 6.0
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 129662496 bytes (123 MB) / 227684352 bytes (217 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 882 (49392 bytes; 0 MB) allocated, 853 (47768 bytes; 0 MB) used
	IntCache: cache: 8, tcache: 0, allocated: 13, tallocated: 95
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 138 (7728 bytes; 0 MB) allocated, 135 (7560 bytes; 0 MB) used
	Player Count: 1 / 8; [mp['lxkspal'/104791, l='TNT Olympics', x=-241.02, y=96.90, z=0.96]]
	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-705776/32552573/