---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 4/18/15 7:22 PM
Description: Exception in server tick loop

java.lang.NullPointerException: Exception in server tick loop
	at mb.g(SourceFile:132)
	at kn.z(SourceFile:99)
	at kn.<init>(SourceFile:25)
	at ko.i(SourceFile:172)
	at net.minecraft.server.MinecraftServer.run(SourceFile:421)
	at java.lang.Thread.run(Unknown Source)


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: 1.8.4
	Operating System: Windows 8.1 (x86) version 6.3
	CPU: 4x AMD A4-6210 APU with AMD Radeon R3 Graphics 
	Java Version: 1.8.0_45, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 483980272 bytes (461 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Is Modded: Unknown (can't tell)
	Type: Dedicated Server (map_server.txt)