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-14862/

Crash:

java.lang.IllegalArgumentException: n must be positive
	at java.util.Random.nextInt(Unknown Source)
	at blq.<init>(SourceFile:97)
	at ats.a(SourceFile:533)
	at awe.e(SourceFile:143)
	at awf.a(SourceFile:210)
	at awd.a(SourceFile:173)
	at awe.a(SourceFile:183)

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

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

Time: 8/9/13 6:18 PM
Description: Rendering screen

java.lang.IllegalArgumentException: n must be positive
	at java.util.Random.nextInt(Unknown Source)
	at blq.<init>(SourceFile:97)
	at ats.a(SourceFile:533)
	at awe.e(SourceFile:143)
	at awf.a(SourceFile:210)
	at awd.a(SourceFile:173)
	at awe.a(SourceFile:183)
	at bfb.b(SourceFile:718)
	at ats.S(SourceFile:686)
	at ats.d(SourceFile:619)
	at net.minecraft.client.main.Main.main(SourceFile:101)


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 blq.<init>(SourceFile:97)
	at ats.a(SourceFile:533)
	at awe.e(SourceFile:143)
	at awf.a(SourceFile:210)
	at awd.a(SourceFile:173)
	at awe.a(SourceFile:183)

-- Screen render details --
Details:
	Screen name: awe
	Mouse location: Scaled: (164, 44). Absolute: (493, 645)
	Screen size: Scaled: (406, 260). Absolute: (1218, 778). Scale factor of 3
Stacktrace:
	at bfb.b(SourceFile:718)
	at ats.S(SourceFile:686)
	at ats.d(SourceFile:619)
	at net.minecraft.client.main.Main.main(SourceFile:101)

-- 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), Oracle Corporation
	Memory: 36665200 bytes (34 MB) / 113160192 bytes (107 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.6.2
	LWJGL: 2.9.0
	OpenGL: Mobile Intel(R) 4 Series Express Chipset Family GL version 2.1.0 - Build 8.15.10.2302, Intel
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Pack: GrumpyCraft.zip
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-14862/1700955/