Hopper: java.lang.NullPointerException

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-242574/

Crash:

java.lang.NullPointerException
	at acq.a(SourceFile:55)
	at uz.a(SourceFile:292)
	at wx.a(SourceFile:58)
	at vv.a(SourceFile:238)
	at kv.a(SourceFile:649)
	at fs.a(SourceFile:32)
	at eb.b(SourceFile:63)
	at kv.e(SourceFile:69)

The following is the first clean report made public about this crash:

---- Minecraft Crash Report ----
// Daisy, daisy...

Time: 26/09/13 20:31
Description: Ticking memory connection

java.lang.NullPointerException
	at acq.a(SourceFile:55)
	at uz.a(SourceFile:292)
	at wx.a(SourceFile:58)
	at vv.a(SourceFile:238)
	at kv.a(SourceFile:649)
	at fs.a(SourceFile:32)
	at eb.b(SourceFile:63)
	at kv.e(SourceFile:69)
	at ky.b(SourceFile:40)
	at bov.b(SourceFile:83)
	at net.minecraft.server.MinecraftServer.u(SourceFile:494)
	at net.minecraft.server.MinecraftServer.t(SourceFile:411)
	at bos.t(SourceFile:121)
	at net.minecraft.server.MinecraftServer.run(SourceFile:346)
	at jc.run(SourceFile:582)


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

-- Head --
Stacktrace:
	at acq.a(SourceFile:55)
	at uz.a(SourceFile:292)
	at wx.a(SourceFile:58)
	at vv.a(SourceFile:238)
	at kv.a(SourceFile:649)
	at fs.a(SourceFile:32)
	at eb.b(SourceFile:63)
	at kv.e(SourceFile:69)

-- Ticking connection --
Details:
	Connection: kv@28655f79
Stacktrace:
	at ky.b(SourceFile:40)
	at bov.b(SourceFile:83)
	at net.minecraft.server.MinecraftServer.u(SourceFile:494)
	at net.minecraft.server.MinecraftServer.t(SourceFile:411)
	at bos.t(SourceFile:121)
	at net.minecraft.server.MinecraftServer.run(SourceFile:346)
	at jc.run(SourceFile:582)

-- System Details --
Details:
	Minecraft Version: 13w39a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_21, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 253802104 bytes (242 MB) / 458948608 bytes (437 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 7077 (396312 bytes; 0 MB) allocated, 6085 (340760 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 652 (36512 bytes; 0 MB) allocated, 571 (31976 bytes; 0 MB) used
	Player Count: 1 / 8; [kq['Finnosaurus'/128, l='1.7!!!!', x=-552.42, y=71.88, z=117.19]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-242574/14432571/