---- Minecraft Crash Report ----
// You're mean.

Time: 01.11.17 13:15
Description: Exception in server tick loop

java.lang.IllegalArgumentException: bound must be positive
	at java.util.Random.nextInt(Random.java:388)
	at aon.b(SourceFile:336)
	at aon.a(SourceFile:311)
	at aon.a(SourceFile:94)
	at aon.a(SourceFile:88)
	at aok.a(SourceFile:245)
	at aou.a(SourceFile:89)
	at bah.b(SourceFile:480)
	at ayz.a(SourceFile:803)
	at ayz.a(SourceFile:791)
	at on.c(SourceFile:115)
	at net.minecraft.server.MinecraftServer.l(SourceFile:361)
	at chw.a(SourceFile:117)
	at chw.j(SourceFile:133)
	at net.minecraft.server.MinecraftServer.run(SourceFile:467)
	at java.lang.Thread.run(Thread.java:745)


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
	Minecraft Version: 17w43b
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 194388192 bytes (185 MB) / 520093696 bytes (496 MB) up to 1073741824 bytes (1024 MB)
	JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
	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.