Hopper: java.lang.IllegalStateException: Already tesselating!

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-192875/

Crash:

java.lang.IllegalStateException: Already tesselating!
	at bfq.b(SourceFile:171)
	at bfq.b(SourceFile:166)
	at bfl.a(SourceFile:768)
	at bfe.a(SourceFile:797)

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

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 2013-09-20 17:15
Description: Unexpected error

java.lang.IllegalStateException: Already tesselating!
	at bfq.b(SourceFile:171)
	at bfq.b(SourceFile:166)
	at bfl.a(SourceFile:768)
	at bfe.a(SourceFile:797)
	at bfe.b(SourceFile:695)
	at atv.S(SourceFile:686)
	at atv.d(SourceFile:619)
	at net.minecraft.client.main.Main.main(SourceFile:101)


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

-- Head --
Stacktrace:
	at bfq.b(SourceFile:171)
	at bfq.b(SourceFile:166)
	at bfl.a(SourceFile:768)
	at bfe.a(SourceFile:797)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bdi['klaus_nice'/3705613, l='MpServer', x=20,38, y=51,62, z=288,30]]
	Chunk stats: MultiplayerChunkCache: 150
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-240,64,188), Chunk: (at 0,4,12 in -15,11; contains blocks -240,0,176 to -225,255,191), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 10779 game time, 10779 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
	Forced entities: 33 total; [sc['Squid'/3705619, l='MpServer', x=11,04, y=47,09, z=255,31], sc['Squid'/3705618, l='MpServer', x=14,46, y=45,00, z=266,15], ro['Bat'/3705617, l='MpServer', x=4,88, y=36,00, z=269,41], sc['Squid'/3705616, l='MpServer', x=-0,64, y=46,34, z=273,65], ro['Bat'/3705623, l='MpServer', x=7,59, y=37,00, z=288,16], ro['Bat'/3705622, l='MpServer', x=6,53, y=19,15, z=280,59], sc['Squid'/3705621, l='MpServer', x=-1,19, y=59,28, z=264,22], ro['Bat'/3705620, l='MpServer', x=5,09, y=36,00, z=270,38], ro['Bat'/3705627, l='MpServer', x=15,06, y=34,10, z=295,22], sc['Squid'/3705626, l='MpServer', x=7,38, y=58,57, z=270,63], sc['Squid'/3705625, l='MpServer', x=5,22, y=45,00, z=270,18], ro['Bat'/3705624, l='MpServer', x=7,03, y=36,46, z=270,97], ro['Bat'/3705631, l='MpServer', x=22,56, y=23,40, z=361,63], sc['Squid'/3705630, l='MpServer', x=14,90, y=50,44, z=258,86], tf['Creeper'/3705689, l='MpServer', x=-49,50, y=30,00, z=247,50], tf['Creeper'/3705688, l='MpServer', x=-53,50, y=30,00, z=245,50], sc['Squid'/3705628, l='MpServer', x=15,10, y=46,00, z=316,29], tf['Creeper'/3706220, l='MpServer', x=6,50, y=39,00, z=211,50], tr['Skeleton'/3706387, l='MpServer', x=82,50, y=30,00, z=217,50], tf['Creeper'/3705728, l='MpServer', x=0,50, y=30,00, z=212,50], bdi['klaus_nice'/3705613, l='MpServer', x=20,38, y=51,62, z=288,30], sc['Squid'/3705615, l='MpServer', x=-16,97, y=57,52, z=285,00], su['entity.MinecartChest.name'/3705612, l='MpServer', x=-33,50, y=41,50, z=314,50], tt['Spider'/3705650, l='MpServer', x=66,50, y=34,00, z=335,50], tf['Creeper'/3706257, l='MpServer', x=-34,50, y=41,00, z=313,50], tf['Creeper'/3706195, l='MpServer', x=73,50, y=16,00, z=329,50], sc['Squid'/3705632, l='MpServer', x=42,47, y=45,00, z=267,50], sc['Squid'/3705633, l='MpServer', x=54,54, y=50,09, z=270,11], ro['Bat'/3705634, l='MpServer', x=56,50, y=15,00, z=329,78], ro['Bat'/3705635, l='MpServer', x=55,56, y=15,02, z=329,88], ro['Bat'/3705637, l='MpServer', x=75,63, y=11,21, z=345,03], ro['Bat'/3705638, l='MpServer', x=85,60, y=17,00, z=221,23], tf['Creeper'/3705704, l='MpServer', x=-3,50, y=16,00, z=267,50]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Non-integrated multiplayer server
Stacktrace:
	at bdd.a(SourceFile:284)
	at atv.b(SourceFile:1761)
	at atv.d(SourceFile:633)
	at net.minecraft.client.main.Main.main(SourceFile:101)

-- System Details --
Details:
	Minecraft Version: 1.6.4
	Operating System: Windows 8 (x86) version 6.2
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 11503280 bytes (10 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: 2 (112 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
	Launched Version: 1.6.4
	LWJGL: 2.9.0
	OpenGL: Intel(R) HD Graphics 4000 GL version 4.0.0 - Build 9.17.10.2843, Intel
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Pack: 90QG
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 21 (1176 bytes; 0 MB) allocated, 21 (1176 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-192875/12615280/