Hopper: java.lang.IllegalArgumentException: Cannot get property bcj{name=variant, clazz=class ati, values=[dirt, coarse_dirt, podzol]} as it does not exist!

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-1682841/

Crash:

java.lang.IllegalArgumentException: Cannot get property bcj{name=variant, clazz=class ati, values=[dirt, coarse_dirt, podzol]} as it does not exist!
	at bbw.b(SourceFile:91)
	at ath.i(SourceFile:51)
	at bqi.at(SourceFile:1989)

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

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

Time: 09.07.14 18:19
Description: Unexpected error

java.lang.IllegalArgumentException: Cannot get property bcj{name=variant, clazz=class ati, values=[dirt, coarse_dirt, podzol]} as it does not exist!
	at bbw.b(SourceFile:91)
	at ath.i(SourceFile:51)
	at bqi.at(SourceFile:1989)
	at bqi.q(SourceFile:1685)
	at bqi.ap(SourceFile:863)
	at bqi.a(SourceFile:303)
	at net.minecraft.client.main.Main.main(SourceFile:120)


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

-- Head --
Stacktrace:
	at bbw.b(SourceFile:91)
	at ath.i(SourceFile:51)
	at bqi.at(SourceFile:1989)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [chv['xyfireballyx'/105728, l='MpServer', x=32.41, y=5.00, z=105.30]]
	Chunk stats: MultiplayerChunkCache: 267, 267
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: 99.00,4.00,-961.00 - World: (99,4,-961), Chunk: (at 3,0,15 in 6,-61; contains blocks 96,0,-976 to 111,255,-961), Region: (0,-2; contains chunks 0,-64 to 31,-33, blocks 0,0,-1024 to 511,255,-513)
	Level time: 369 game time, 61 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: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 24 total; [afq['Villager'/468809, l='MpServer', x=51.28, y=5.00, z=63.66], afq['Villager'/468808, l='MpServer', x=49.44, y=5.00, z=70.75], afq['Villager'/469788, l='MpServer', x=99.41, y=5.00, z=50.97], chv['xyfireballyx'/105728, l='MpServer', x=32.41, y=5.00, z=105.30], afq['Villager'/469789, l='MpServer', x=73.44, y=5.00, z=49.75], acy['item.item.carrots'/2670249, l='MpServer', x=30.48, y=5.00, z=103.50], afq['Villager'/468710, l='MpServer', x=64.50, y=5.00, z=92.50], afq['Villager'/468711, l='MpServer', x=57.78, y=5.00, z=95.38], afq['Villager'/469581, l='MpServer', x=86.50, y=5.00, z=72.50], afq['Villager'/469580, l='MpServer', x=74.50, y=5.00, z=72.50], afq['Villager'/469582, l='MpServer', x=89.53, y=5.00, z=72.97], afq['Villager'/468637, l='MpServer', x=46.28, y=5.00, z=101.66], afq['Villager'/469579, l='MpServer', x=70.84, y=5.00, z=85.47], afq['Villager'/469578, l='MpServer', x=72.50, y=5.00, z=76.50], afk['Zombie'/2086760, l='MpServer', x=70.50, y=9.00, z=48.50], afq['Villager'/469596, l='MpServer', x=92.50, y=5.00, z=102.50], afq['Villager'/469597, l='MpServer', x=76.13, y=5.00, z=90.56], afq['Villager'/469598, l='MpServer', x=75.50, y=5.00, z=94.50], afq['Villager'/469599, l='MpServer', x=86.50, y=5.00, z=94.50], afq['Villager'/469595, l='MpServer', x=91.50, y=5.00, z=102.50], afq['Villager'/469602, l='MpServer', x=74.44, y=6.00, z=104.25], afq['Villager'/469601, l='MpServer', x=77.50, y=5.00, z=102.50], afq['Villager'/469600, l='MpServer', x=87.50, y=5.00, z=94.50], afq['Villager'/469615, l='MpServer', x=64.50, y=5.00, z=47.50]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at cdu.a(SourceFile:308)
	at bqi.b(SourceFile:2139)
	at bqi.a(SourceFile:317)
	at net.minecraft.client.main.Main.main(SourceFile:120)

-- System Details --
Details:
	Minecraft Version: 14w28a
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.6.0_22, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Sun Microsystems Inc.
	Memory: 116007456 bytes (110 MB) / 222408704 bytes (212 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 14w28a
	LWJGL: 2.9.1
	OpenGL: Intel(R) HD Graphics Family GL version 3.1.0 - Build 8.15.10.2476, Intel
	GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.

	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: English (US)
	Profiler Position: N/A (disabled)

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-1682841/69237652/