Hopper: java.lang.NullPointerException

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-147853/

Crash:

java.lang.NullPointerException
	at acu.a(SourceFile:110)
	at acu.h(SourceFile:234)
	at blz.a(SourceFile:22)
	at blz.a(SourceFile:17)
	at blz.a(SourceFile:12)

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

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

Time: 9/13/13 5:24 PM
Description: Rendering Tile Entity

java.lang.NullPointerException
	at acu.a(SourceFile:110)
	at acu.h(SourceFile:234)
	at blz.a(SourceFile:22)
	at blz.a(SourceFile:17)
	at blz.a(SourceFile:12)
	at bme.a(SourceFile:106)
	at bme.a(SourceFile:98)
	at bih.a(SourceFile:334)
	at bia.a(SourceFile:848)
	at bia.b(SourceFile:695)
	at awo.V(SourceFile:717)
	at awo.e(SourceFile:646)
	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 acu.a(SourceFile:110)
	at acu.h(SourceFile:234)
	at blz.a(SourceFile:22)
	at blz.a(SourceFile:17)
	at blz.a(SourceFile:12)

-- Tile Entity Details --
Details:
	Name: MobSpawner // avc
	Block type: ID #52 (tile.mobSpawner // arz)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (199,53,1495), Chunk: (at 7,3,7 in 12,93; contains blocks 192,0,1488 to 207,255,1503), Region: (0,2; contains chunks 0,64 to 31,95, blocks 0,0,1024 to 511,255,1535)
	Actual block type: ID #52 (tile.mobSpawner // arz)
	Actual block data value: 0 / 0x0 / 0b0000
Stacktrace:
	at bme.a(SourceFile:106)
	at bme.a(SourceFile:98)
	at bih.a(SourceFile:334)
	at bia.a(SourceFile:848)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bfz['LiamDudas10'/171077, l='MpServer', x=200.77, y=55.70, z=1495.16]]
	Chunk stats: MultiplayerChunkCache: 5, 5
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (242,63,1348), Chunk: (at 2,3,4 in 15,84; contains blocks 240,0,1344 to 255,255,1359), Region: (0,2; contains chunks 0,64 to 31,95, blocks 0,0,1024 to 511,255,1535)
	Level time: 189986 game time, 40861 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: 1 total; [bfz['LiamDudas10'/171077, l='MpServer', x=200.77, y=55.70, z=1495.16]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bfu.a(SourceFile:285)
	at awo.b(SourceFile:1821)
	at awo.e(SourceFile:655)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w37b
	Operating System: Windows 8 (amd64) version 6.2
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 188011536 bytes (179 MB) / 446234624 bytes (425 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 7955 (445480 bytes; 0 MB) allocated, 4 (224 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Launched Version: 13w37b
	LWJGL: 2.9.0
	OpenGL: Intel(R) HD Graphics 4000 GL version 4.0.0 - Build 9.17.10.2828, Intel
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: [Atherys Ascended x32 1.6.2 V.2.0.zip]
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 92 (5152 bytes; 0 MB) allocated, 40 (2240 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-147853/10577509/