Hopper: java.lang.NullPointerException

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-197022/

Crash:

java.lang.NullPointerException
	at bmk.a(SourceFile:168)

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

---- Minecraft Crash Report ----
// Would you like a cupcake?

Time: 9/21/13 7:04 AM
Description: Stitching texture atlas

java.lang.NullPointerException
	at bmk.a(SourceFile:168)
	at bmf.b(SourceFile:128)
	at bmf.a(SourceFile:75)
	at bmh.a(SourceFile:69)
	at bmh.a(SourceFile:133)
	at bns.c(SourceFile:101)
	at bns.a(SourceFile:89)
	at awp.b(SourceFile:458)
	at bdk.a(SourceFile:147)
	at azq.a(SourceFile:172)
	at bdk.a(SourceFile:154)
	at azq.d(SourceFile:236)
	at azq.m(SourceFile:211)
	at awp.o(SourceFile:1256)
	at awp.aa(SourceFile:726)
	at awp.e(SourceFile:677)
	at net.minecraft.client.main.Main.main(SourceFile:104)


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

-- Head --
Stacktrace:
	at bmk.a(SourceFile:168)

-- Texture being stitched together --
Details:
	Atlas path: textures/blocks
	Sprite: TextureAtlasSprite{name='diamond_ore', frameCount=10, rotated=false, x=640, y=160, height=80, width=80, u0=0.31641114, u1=0.34765136, v0=0.08203613, v1=0.11327637}
Stacktrace:
	at bmf.b(SourceFile:128)
	at bmf.a(SourceFile:75)

-- Resource location being registered --
Details:
	Resource location: minecraft:textures/atlas/blocks.png
	Texture object class: bmf
Stacktrace:
	at bmh.a(SourceFile:69)
	at bmh.a(SourceFile:133)
	at bns.c(SourceFile:101)
	at bns.a(SourceFile:89)
	at awp.b(SourceFile:458)
	at bdk.a(SourceFile:147)
	at azq.a(SourceFile:172)
	at bdk.a(SourceFile:154)
	at azq.d(SourceFile:236)
	at azq.m(SourceFile:211)

-- Affected screen --
Details:
	Screen name: bdk

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bgh['herobrine914'/52, l='MpServer', x=-245.88, y=5.62, z=-246.24]]
	Chunk stats: MultiplayerChunkCache: 225, 225
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-271,4,-249), Chunk: (at 1,0,7 in -17,-16; contains blocks -272,0,-256 to -257,255,-241), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
	Level time: 14297 game time, 25207 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: 6 total; [sx['Pig'/34, l='MpServer', x=-222.38, y=4.00, z=-280.75], sx['Pig'/35, l='MpServer', x=-203.03, y=4.00, z=-273.16], sx['Pig'/33, l='MpServer', x=-265.84, y=4.00, z=-257.28], bgh['herobrine914'/52, l='MpServer', x=-245.88, y=5.62, z=-246.24], sx['Pig'/36, l='MpServer', x=-188.75, y=4.00, z=-253.91], sp['Chicken'/37, l='MpServer', x=-166.41, y=4.00, z=-261.44]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bgc.a(SourceFile:297)
	at awp.b(SourceFile:1874)
	at awp.e(SourceFile:686)
	at net.minecraft.client.main.Main.main(SourceFile:104)

-- System Details --
Details:
	Minecraft Version: 13w38c
	Operating System: Mac OS X (x86_64) version 10.7.5
	Java Version: 1.6.0_43, Apple Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
	Memory: 41302880 bytes (39 MB) / 128155648 bytes (122 MB) up to 1065025536 bytes (1015 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 18003 (1008168 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 13w38c
	LWJGL: 2.9.0
	OpenGL: Intel HD Graphics 3000 OpenGL Engine GL version 2.1 APPLE-7.32.12, Intel Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: [oCd pack 1.6 by disco.zip, Modern HD 1.5.2-converted-1372615366036.zip]
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 66 (3696 bytes; 0 MB) allocated, 12 (672 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-197022/12917957/