---- Minecraft Crash Report ----
// Oops.

Time: 03.05.15 11:41
Description: Exception in server tick loop

java.lang.IllegalArgumentException: bound must be positive
	at java.util.Random.nextInt(Random.java:388)
	at aeb.b(SourceFile:323)
	at aeb.a(SourceFile:339)
	at aeb.a(SourceFile:92)
	at aeb.a(SourceFile:49)
	at ady.a(SourceFile:388)
	at aer.a(SourceFile:56)
	at aoa.a(SourceFile:473)
	at ld.a(SourceFile:174)
	at amy.a(SourceFile:875)
	at ld.c(SourceFile:104)
	at net.minecraft.server.MinecraftServer.k(SourceFile:315)
	at bpo.a(SourceFile:112)
	at bpo.i(SourceFile:128)
	at net.minecraft.server.MinecraftServer.run(SourceFile:421)
	at java.lang.Thread.run(Thread.java:745)


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

-- System Details --
Details:
	Minecraft Version: 1.8.4
	Operating System: Windows 7 (amd64) version 6.1
	CPU: 4x Intel(R) Core(TM)2 Quad CPU Q8300 @ 2.50GHz
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 128281840 bytes (122 MB) / 240263168 bytes (229 MB) up to 2134114304 bytes (2035 MB)
	JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 97
	Profiler Position: N/A (disabled)
	Player Count: 0 / 8; []
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.