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

Time: 28/12/12 20:06
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 7 (amd64) version 6.1
	Java Version: 1.7.0_10, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 3594162080 bytes (3427 MB) / 4116054016 bytes (3925 MB) up to 4116054016 bytes (3925 MB)
	JVM Flags: 2 total; -Xmx4096M -Xms4096M
	AABB Pool Size: 339967 (19038152 bytes; 18 MB) allocated, 339967 (19038152 bytes; 18 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: 28679 (1606024 bytes; 1 MB) allocated, 28679 (1606024 bytes; 1 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.