---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 29.05.13 3:01
Description: Ticking memory connection

java.lang.NullPointerException
	at z.a(SourceFile:170)
	at z.a(SourceFile:191)
	at hw.a(SourceFile:531)
	at aa.b(SourceFile:124)
	at net.minecraft.server.MinecraftServer.a(SourceFile:708)
	at jm.a(SourceFile:757)
	at cz.a(SourceFile:31)
	at cj.b(SourceFile:64)
	at jm.d(SourceFile:57)
	at jp.b(SourceFile:37)
	at bie.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.s(SourceFile:491)
	at net.minecraft.server.MinecraftServer.r(SourceFile:408)
	at bib.r(SourceFile:125)
	at net.minecraft.server.MinecraftServer.run(SourceFile:342)
	at gu.run(SourceFile:585)


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

-- Head --
Stacktrace:
	at z.a(SourceFile:170)
	at z.a(SourceFile:191)
	at hw.a(SourceFile:531)
	at aa.b(SourceFile:124)
	at net.minecraft.server.MinecraftServer.a(SourceFile:708)
	at jm.a(SourceFile:757)
	at cz.a(SourceFile:31)
	at cj.b(SourceFile:64)
	at jm.d(SourceFile:57)

-- Ticking connection --
Details:
	Connection: jm@1d5977d
Stacktrace:
	at jp.b(SourceFile:37)
	at bie.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.s(SourceFile:491)
	at net.minecraft.server.MinecraftServer.r(SourceFile:408)
	at bib.r(SourceFile:125)
	at net.minecraft.server.MinecraftServer.run(SourceFile:342)
	at gu.run(SourceFile:585)

-- System Details --
Details:
	Minecraft Version: 13w21b
	Operating System: Windows XP (x86) version 5.1
	Java Version: 1.7.0_21, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 126337072 bytes (120 MB) / 354402304 bytes (337 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 5023 (281288 bytes; 0 MB) allocated, 4620 (258720 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 1431 (80136 bytes; 0 MB) allocated, 1093 (61208 bytes; 0 MB) used
	Player Count: 1 / 8; [jh['Tails_D'/440, l='Test World', x=-282,53, y=70,35, z=78,63]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.