---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 12/29/12 1:29 PM
Description: Exception in server tick loop

java.lang.NullPointerException
	at cf.b(SourceFile:103)
	at cf.a(SourceFile:35)
	at iv.b(SourceFile:436)
	at gm.a(SourceFile:72)
	at bec.b(SourceFile:73)
	at net.minecraft.server.MinecraftServer.r(SourceFile:762)
	at net.minecraft.server.MinecraftServer.q(SourceFile:679)
	at bdz.q(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:613)
	at fy.run(SourceFile:849)


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

-- System Details --
Details:
	Minecraft Version: 1.4.6
	Operating System: Windows 8 (x86) version 6.2
	Java Version: 1.7.0_09, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 322764024 bytes (307 MB) / 1037959168 bytes (989 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 3 total; -Xbootclasspath/a:C:\\PROGRA~2\\Java\\jre7\\lib\\deploy.jar;C:\\PROGRA~2\\Java\\jre7\\lib\\javaws.jar;C:\\PROGRA~2\\Java\\jre7\\lib\\plugin.jar -Xmx1g -Xms1024M
	AABB Pool Size: 98473 (5514488 bytes; 5 MB) allocated, 98473 (5514488 bytes; 5 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 7995509 (447748504 bytes; 427 MB) allocated, 7995509 (447748504 bytes; 427 MB) used
	Player Count: 0 / 8; []
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.