---- Minecraft Crash Report ----
// Sorry :(

Time: 6/2/14 3:49 PM
Description: Executing command block

java.lang.NullPointerException: Executing command block
	at java.util.Collections.addAll(Unknown Source)
	at ad.b(SourceFile:152)
	at z.a(SourceFile:47)
	at akw.a(SourceFile:92)
	at aos.b(SourceFile:60)
	at oq.a(SourceFile:482)
	at oq.c(SourceFile:193)
	at net.minecraft.server.MinecraftServer.w(SourceFile:570)
	at net.minecraft.server.MinecraftServer.v(SourceFile:506)
	at cln.v(SourceFile:132)
	at net.minecraft.server.MinecraftServer.run(SourceFile:422)
	at java.lang.Thread.run(Unknown Source)


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

-- Head --
Stacktrace:
	at java.util.Collections.addAll(Unknown Source)
	at ad.b(SourceFile:152)
	at z.a(SourceFile:47)

-- Command to be executed --
Details:
	Command: tp @e[type=Enderman] ~ -200 ~
	Name: @
Stacktrace:
	at akw.a(SourceFile:92)
	at aos.b(SourceFile:60)

-- Block being ticked --
Details:
	Block type: ID #137 (tile.commandBlock // aos)
	Block data value: 1 / 0x1 / 0b0001
	Block location: World: (21,68,-41), Chunk: (at 5,4,7 in 1,-3; contains blocks 16,0,-48 to 31,255,-33), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Stacktrace:
	at oq.a(SourceFile:482)
	at oq.c(SourceFile:193)

-- Affected level --
Details:
	Level name: DonGlitchy's Survival World
	All players: 0 total; []
	Chunk stats: ServerChunkCache: 527 Drop: 81
	Level seed: 27594263
	Level generator: ID 02 - largeBiomes, ver 0. Features enabled: true
	Level generator options: 
	Level spawn location: 0.00,69.00,0.00 - World: (0,69,0), Chunk: (at 0,4,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 280077 game time, 5802 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 1 (now: false), thunder time: 1 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.w(SourceFile:570)
	at net.minecraft.server.MinecraftServer.v(SourceFile:506)
	at cln.v(SourceFile:132)
	at net.minecraft.server.MinecraftServer.run(SourceFile:422)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 14w21b
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_55, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 138866016 bytes (132 MB) / 226037760 bytes (215 MB) up to 944701440 bytes (900 MB)
	JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -Xmx932M
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 99
	Profiler Position: N/A (disabled)
	Player Count: 0 / 8; []
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.