Hopper: java.lang.NullPointerException: Ticking memory connection

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-704448/

Crash:

java.lang.NullPointerException: Ticking memory connection
	at afd.a(SourceFile:55)
	at xl.a(SourceFile:292)
	at zk.a(SourceFile:58)
	at yi.a(SourceFile:238)
	at na.a(SourceFile:623)
	at io.a(SourceFile:32)
	at io.a(SourceFile:10)
	at ef.a(SourceFile:164)

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

---- Minecraft Crash Report ----
// Oops.

Time: 13-11-27 04:49
Description: Ticking memory connection

java.lang.NullPointerException: Ticking memory connection
	at afd.a(SourceFile:55)
	at xl.a(SourceFile:292)
	at zk.a(SourceFile:58)
	at yi.a(SourceFile:238)
	at na.a(SourceFile:623)
	at io.a(SourceFile:32)
	at io.a(SourceFile:10)
	at ef.a(SourceFile:164)
	at mv.c(SourceFile:134)
	at net.minecraft.server.MinecraftServer.u(SourceFile:528)
	at net.minecraft.server.MinecraftServer.t(SourceFile:440)
	at bth.t(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:357)
	at lb.run(SourceFile:616)


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

-- Head --
Stacktrace:
	at afd.a(SourceFile:55)
	at xl.a(SourceFile:292)
	at zk.a(SourceFile:58)
	at yi.a(SourceFile:238)
	at na.a(SourceFile:623)
	at io.a(SourceFile:32)
	at io.a(SourceFile:10)
	at ef.a(SourceFile:164)

-- Ticking connection --
Details:
	Connection: ef@39aa42
Stacktrace:
	at mv.c(SourceFile:134)
	at net.minecraft.server.MinecraftServer.u(SourceFile:528)
	at net.minecraft.server.MinecraftServer.t(SourceFile:440)
	at bth.t(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:357)
	at lb.run(SourceFile:616)

-- System Details --
Details:
	Minecraft Version: 13w48b
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.6.0_25, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Sun Microsystems Inc.
	Memory: 233649848 bytes (222 MB) / 518979584 bytes (494 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 9267 (518952 bytes; 0 MB) allocated, 1089 (60984 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 719 (40264 bytes; 0 MB) allocated, 613 (34328 bytes; 0 MB) used
	Player Count: 1 / 8; [mp['Jepel123'/3, l='Wrath of the Fallen by Hypixel (Update 7)', x=-447,58, y=87,00, z=-785,60]]
	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-704448/32701561/