Hopper: java.lang.IllegalStateException: Failed to add player. mp['mappy175'/117, l='Current version: 1.7.2', x=218.72, y=64.94, z=-641.05] already is in chun

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-779023/

Crash:

java.lang.IllegalStateException: Failed to add player. mp['mappy175'/117, l='Current version: 1.7.2', x=218.72, y=64.94, z=-641.05] already is in chunk 5, -49
	at mk.a(SourceFile:37)
	at mj.d(SourceFile:346)
	at lg.d(SourceFile:215)
	at na.a(SourceFile:280)
	at iu.a(SourceFile:137)
	at iv.a(SourceFile:63)
	at ef.a(SourceFile:164)

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

---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 12/6/13 9:26 AM
Description: Ticking memory connection

java.lang.IllegalStateException: Failed to add player. mp['phantom715'/607, l='Grenadine', x=-97.54, y=63.00, z=-179.33] already is in chunk -11, -16
	at mk.a(SourceFile:37)
	at mj.d(SourceFile:346)
	at lg.d(SourceFile:215)
	at na.a(SourceFile:280)
	at iu.a(SourceFile:137)
	at iv.a(SourceFile:63)
	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 btk.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 mk.a(SourceFile:37)
	at mj.d(SourceFile:346)
	at lg.d(SourceFile:215)
	at na.a(SourceFile:280)
	at iu.a(SourceFile:137)
	at iv.a(SourceFile:63)
	at ef.a(SourceFile:164)

-- Ticking connection --
Details:
	Connection: ef@17145d1
Stacktrace:
	at mv.c(SourceFile:134)
	at net.minecraft.server.MinecraftServer.u(SourceFile:528)
	at net.minecraft.server.MinecraftServer.t(SourceFile:440)
	at btk.t(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:357)
	at lb.run(SourceFile:616)

-- System Details --
Details:
	Minecraft Version: 1.7.3
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.6.0_26, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Sun Microsystems Inc.
	Memory: 63223104 bytes (60 MB) / 208605184 bytes (198 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 7586 (424816 bytes; 0 MB) allocated, 7010 (392560 bytes; 0 MB) used
	IntCache: cache: 15, tcache: 0, allocated: 13, tallocated: 95
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 1411 (79016 bytes; 0 MB) allocated, 1297 (72632 bytes; 0 MB) used
	Player Count: 1 / 8; [mp['phantom715'/607, l='Grenadine', x=-97.54, y=63.00, z=-179.33]]
	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-779023/36127248/