---- Minecraft Crash Report ----
// Why did you do that?

Time: 2/27/13 9:00 PM
Description: Exception in server tick loop

java.lang.NullPointerException
	at ch.b(SourceFile:107)
	at ch.a(SourceFile:39)
	at jg.b(SourceFile:427)
	at gt.b(SourceFile:669)
	at gt.a(SourceFile:79)
	at bja.b(SourceFile:73)
	at net.minecraft.server.MinecraftServer.r(SourceFile:480)
	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
	at bix.q(SourceFile:122)
	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
	at go.run(SourceFile:573)


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: 13w09b
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_07, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 260380328 bytes (248 MB) / 648740864 bytes (618 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 33838 (1894928 bytes; 1 MB) allocated, 33838 (1894928 bytes; 1 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 4428 (247968 bytes; 0 MB) allocated, 4428 (247968 bytes; 0 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.