java.lang.IllegalArgumentException: Modifier name cannot be empty
	at org.apache.commons.lang3.Validate.notEmpty(Validate.java:398)
	at pi.<init>(SourceFile:31)
	at ug.a(SourceFile:92)
	at yx.D(SourceFile:581)
	at yx.a(SourceFile:471)
	at azr.a(SourceFile:188)
	at azr.a(SourceFile:168)

---- Minecraft Crash Report ----
// Oh - I know what I did wrong!

Time: 9/5/13 2:22 PM
Description: Rendering screen

java.lang.IllegalArgumentException: Modifier name cannot be empty
	at org.apache.commons.lang3.Validate.notEmpty(Validate.java:398)
	at pi.<init>(SourceFile:31)
	at ug.a(SourceFile:92)
	at yx.D(SourceFile:581)
	at yx.a(SourceFile:471)
	at azr.a(SourceFile:188)
	at azr.a(SourceFile:168)
	at bhh.b(SourceFile:720)
	at avx.V(SourceFile:713)
	at avx.e(SourceFile:642)
	at net.minecraft.client.main.Main.main(SourceFile:103)


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

-- Head --
Stacktrace:
	at org.apache.commons.lang3.Validate.notEmpty(Validate.java:398)
	at pi.<init>(SourceFile:31)
	at ug.a(SourceFile:92)
	at yx.D(SourceFile:581)
	at yx.a(SourceFile:471)
	at azr.a(SourceFile:188)
	at azr.a(SourceFile:168)

-- Screen render details --
Details:
	Screen name: bac
	Mouse location: Scaled: (175, 63). Absolute: (702, 712)
	Screen size: Scaled: (480, 242). Absolute: (1920, 968). Scale factor of 4

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bfg['Falconboy08'/336, l='MpServer', x=13.50, y=63.62, z=-4.36]]
	Chunk stats: MultiplayerChunkCache: 225, 225
	Level seed: 0
	Level generator: ID 03 - amplified, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-192,64,256), Chunk: (at 0,4,0 in -12,16; contains blocks -192,0,256 to -177,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 15039 game time, 15039 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: 78 total; [tx['Enderman'/410, l='MpServer', x=45.00, y=58.00, z=23.09], tx['Enderman'/411, l='MpServer', x=41.75, y=59.00, z=22.28], tx['Enderman'/408, l='MpServer', x=41.59, y=58.00, z=-15.59], tx['Enderman'/409, l='MpServer', x=40.66, y=59.00, z=21.13], tx['Enderman'/412, l='MpServer', x=42.46, y=58.00, z=35.19], sz['Ender Dragon'/413, l='MpServer', x=32.11, y=103.56, z=46.97], tx['Enderman'/402, l='MpServer', x=31.63, y=58.00, z=45.91], tx['Enderman'/403, l='MpServer', x=21.20, y=59.00, z=51.69], tx['Enderman'/400, l='MpServer', x=29.56, y=60.00, z=-15.03], tx['Enderman'/401, l='MpServer', x=21.60, y=62.02, z=3.25], tx['Enderman'/406, l='MpServer', x=37.59, y=32.00, z=-60.13], tx['Enderman'/407, l='MpServer', x=39.50, y=57.00, z=-23.84], tx['Enderman'/404, l='MpServer', x=32.93, y=57.00, z=57.17], tx['Enderman'/405, l='MpServer', x=34.09, y=32.00, z=-64.49], tx['Enderman'/395, l='MpServer', x=6.61, y=61.00, z=20.60], tx['Enderman'/394, l='MpServer', x=8.50, y=62.00, z=26.28], tx['Enderman'/393, l='MpServer', x=2.96, y=61.00, z=-16.53], tx['Enderman'/392, l='MpServer', x=3.67, y=61.00, z=-18.01], tx['Enderman'/399, l='MpServer', x=24.87, y=58.00, z=-22.99], tx['Enderman'/398, l='MpServer', x=31.50, y=56.00, z=-49.44], tx['Enderman'/397, l='MpServer', x=24.89, y=57.00, z=-53.26], tx['Enderman'/396, l='MpServer', x=28.66, y=54.00, z=-57.79], tx['Enderman'/387, l='MpServer', x=0.50, y=57.00, z=-65.88], tx['Enderman'/386, l='MpServer', x=-9.69, y=57.00, z=72.03], tx['Enderman'/385, l='MpServer', x=-10.96, y=57.00, z=69.19], tx['Enderman'/391, l='MpServer', x=8.50, y=48.00, z=-60.50], tx['Enderman'/390, l='MpServer', x=5.47, y=57.00, z=-57.89], tx['Enderman'/389, l='MpServer', x=6.23, y=57.00, z=-60.64], tx['Enderman'/388, l='MpServer', x=4.57, y=57.00, z=-58.48], tx['Enderman'/425, l='MpServer', x=63.29, y=48.46, z=40.54], tx['Enderman'/424, l='MpServer', x=62.49, y=59.00, z=-1.13], bfg['Falconboy08'/336, l='MpServer', x=13.50, y=63.62, z=-4.36], uy['arrow'/426, l='MpServer', x=66.18, y=57.05, z=38.59], tx['Enderman'/421, l='MpServer', x=34.53, y=57.00, z=57.88], tx['Enderman'/423, l='MpServer', x=60.08, y=48.00, z=46.60], tx['Enderman'/422, l='MpServer', x=58.50, y=53.00, z=-13.50], tx['Enderman'/343, l='MpServer', x=-59.31, y=34.00, z=-38.00], tx['Enderman'/342, l='MpServer', x=-64.03, y=37.00, z=8.41], tx['Enderman'/341, l='MpServer', x=-64.97, y=42.00, z=-3.13], tx['Enderman'/339, l='MpServer', x=6.66, y=61.00, z=-8.75], tx['Enderman'/338, l='MpServer', x=9.98, y=61.00, z=-5.66], tx['Enderman'/337, l='MpServer', x=7.91, y=61.00, z=-7.97], tx['Enderman'/351, l='MpServer', x=-41.34, y=57.00, z=23.84], tx['Enderman'/350, l='MpServer', x=-32.33, y=59.00, z=-10.23], tx['Enderman'/349, l='MpServer', x=-41.53, y=57.00, z=-23.94], tx['Enderman'/348, l='MpServer', x=-50.47, y=51.00, z=57.00], tx['Enderman'/347, l='MpServer', x=-50.00, y=56.00, z=32.59], tx['Enderman'/346, l='MpServer', x=-61.56, y=49.00, z=17.59], tx['Enderman'/345, l='MpServer', x=-52.75, y=57.00, z=-0.72], tx['Enderman'/344, l='MpServer', x=-57.28, y=51.00, z=-22.54], tx['Enderman'/372, l='MpServer', x=-20.16, y=58.34, z=50.53], tx['Enderman'/375, l='MpServer', x=-26.92, y=57.00, z=70.65], tx['Enderman'/374, l='MpServer', x=-27.73, y=58.00, z=68.78], tx['Enderman'/369, l='MpServer', x=-27.53, y=58.00, z=47.92], tx['Enderman'/368, l='MpServer', x=-23.97, y=60.00, z=11.38], tx['Enderman'/371, l='MpServer', x=-31.88, y=58.00, z=33.91], tx['Enderman'/370, l='MpServer', x=-25.43, y=58.00, z=38.93], tx['Enderman'/381, l='MpServer', x=-11.56, y=60.00, z=33.99], tx['Enderman'/380, l='MpServer', x=-13.00, y=61.00, z=25.63], tx['Enderman'/382, l='MpServer', x=-7.26, y=60.63, z=32.31], tx['Enderman'/379, l='MpServer', x=-6.36, y=59.00, z=-28.39], tx['Enderman'/378, l='MpServer', x=-13.78, y=58.00, z=-54.00], tx['Enderman'/356, l='MpServer', x=-46.61, y=57.00, z=71.62], tx['Enderman'/357, l='MpServer', x=-44.09, y=57.00, z=66.44], tx['Enderman'/358, l='MpServer', x=-48.00, y=57.00, z=71.53], tx['Enderman'/359, l='MpServer', x=-38.39, y=58.00, z=66.85], tx['Enderman'/352, l='MpServer', x=-36.56, y=58.00, z=26.97], tx['Enderman'/353, l='MpServer', x=-39.06, y=57.00, z=38.47], tx['Enderman'/354, l='MpServer', x=-32.75, y=57.00, z=49.75], tx['Enderman'/355, l='MpServer', x=-34.50, y=58.00, z=70.50], tx['Enderman'/364, l='MpServer', x=-19.59, y=59.00, z=-15.16], tx['Enderman'/365, l='MpServer', x=-20.56, y=60.00, z=-3.03], tx['Enderman'/366, l='MpServer', x=-20.00, y=60.00, z=13.06], tx['Enderman'/367, l='MpServer', x=-23.50, y=60.00, z=0.09], tx['Enderman'/360, l='MpServer', x=-24.00, y=59.00, z=-22.38], tx['Enderman'/361, l='MpServer', x=-24.50, y=59.00, z=-26.09], tx['Enderman'/362, l='MpServer', x=-25.15, y=59.00, z=-20.09], tx['Enderman'/363, l='MpServer', x=-26.16, y=59.00, z=-11.41]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bfb.a(SourceFile:285)
	at avx.b(SourceFile:1813)
	at avx.e(SourceFile:651)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w36a
	Operating System: Mac OS X (x86_64) version 10.7.5
	Java Version: 1.6.0_51, Apple Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
	Memory: 92795400 bytes (88 MB) / 221638656 bytes (211 MB) up to 1065025536 bytes (1015 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 18726 (1048656 bytes; 1 MB) allocated, 5 (280 bytes; 0 MB) used
	Suspicious classes: [com.ibm.icu.text.ArabicShapingException], [gnu.trove.TIntCollection], [gnu.trove.impl.HashFunctions, PrimeFinder], [gnu.trove.impl.hash.THash, TPrimitiveHash, TIntIntHash], [gnu.trove.iterator.TIterator, TAdvancingIterator, TIntIntIterator], [gnu.trove.map.TIntIntMap], [gnu.trove.map.hash.TIntIntHashMap], [gnu.trove.procedure.TIntIntProcedure], [gnu.trove.set.TIntSet]
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	Launched Version: 13w36a
	LWJGL: 2.9.0
	OpenGL: AMD Radeon HD 6750M OpenGL Engine GL version 2.1 ATI-7.32.12, ATI Technologies Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: [Falcon Pack]
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 1189 (66584 bytes; 0 MB) allocated, 31 (1736 bytes; 0 MB) used