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-2589/

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 ug.l_(SourceFile:265)
	at abv.a(SourceFile:1349)
	at jr.a(SourceFile:479)
	at abv.g(SourceFile:1327)

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

---- Minecraft Crash Report ----
// Ouch. That hurt :(

Time: 02/08/13 14:44
Description: Ticking entity

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 ug.l_(SourceFile:265)
	at abv.a(SourceFile:1349)
	at jr.a(SourceFile:479)
	at abv.g(SourceFile:1327)
	at abv.h(SourceFile:1234)
	at jr.h(SourceFile:364)
	at net.minecraft.server.MinecraftServer.t(SourceFile:470)
	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 ug.l_(SourceFile:265)
	at abv.a(SourceFile:1349)
	at jr.a(SourceFile:479)
	at abv.g(SourceFile:1327)

-- Entity being ticked --
Details:
	Entity Type: Arrow (ug)
	Entity ID: 1193
	Entity Name: arrow
	Entity's Exact location: 578.91, 96.23, -200.31
	Entity's Block location: World: (578,96,-201), Chunk: (at 2,6,7 in 36,-13; contains blocks 576,0,-208 to 591,255,-193), Region: (1,-1; contains chunks 32,-32 to 63,-1, blocks 512,0,-512 to 1023,255,-1)
	Entity's Momentum: -0.00, -0.23, 0.00
Stacktrace:
	at abv.h(SourceFile:1234)
	at jr.h(SourceFile:364)

-- Affected level --
Details:
	Level name: Cool new world
	All players: 1 total; [ju['ReternedHerobrine'/178, l='Cool new world', x=578.79, y=94.00, z=-200.35]]
	Chunk stats: ServerChunkCache: 1114 Drop: 0
	Level seed: -5353573041967054848
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (73,64,276), Chunk: (at 9,4,4 in 4,17; contains blocks 64,0,272 to 79,255,287), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 892284 game time, 314883 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 68720 (now: false), thunder time: 77522 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.t(SourceFile:470)
	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 (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: 68106520 bytes (64 MB) / 265105408 bytes (252 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 5770 (323120 bytes; 0 MB) allocated, 5667 (317352 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 1678 (93968 bytes; 0 MB) allocated, 1492 (83552 bytes; 0 MB) used
	Player Count: 1 / 8; [ju['ReternedHerobrine'/178, l='Cool new world', x=578.79, y=94.00, z=-200.35]]
	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-2589/30718/