---- Minecraft Crash Report ----
// Ouch. That hurt :(

Time: 21/06/14 2:23 AM
Description: Executing command block

java.lang.NullPointerException: Executing command block
	at java.util.Collections.addAll(Unknown Source)
	at af.b(SourceFile:152)
	at ab.a(SourceFile:47)
	at alg.a(SourceFile:92)
	at apb.c(SourceFile:56)
	at ou.a(SourceFile:466)
	at ou.c(SourceFile:176)
	at net.minecraft.server.MinecraftServer.w(SourceFile:570)
	at net.minecraft.server.MinecraftServer.v(SourceFile:506)
	at coe.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 af.b(SourceFile:152)
	at ab.a(SourceFile:47)

-- Command to be executed --
Details:
	Command: /execute @e[type=Bat] ~ ~ ~ /clone 0 56 3 0 61 3 ~ ~-8 ~ masked
	Name: @
Stacktrace:
	at alg.a(SourceFile:92)
	at apb.c(SourceFile:56)

-- Block being ticked --
Details:
	Block type: ID #137 (tile.commandBlock // apb)
	Block data value: 1 / 0x1 / 0b0001
	Block location: World: (1,56,3), Chunk: (at 1,3,3 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)
Stacktrace:
	at ou.a(SourceFile:466)
	at ou.c(SourceFile:176)

-- Affected level --
Details:
	Level name: 14w25b test
	All players: 0 total; []
	Chunk stats: ServerChunkCache: 661 Drop: 405
	Level seed: -7453039034743040489
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 3;minecraft:bedrock,3*minecraft:stone,52*minecraft:sandstone;2;
	Level spawn location: 0.00,56.00,0.00 - World: (0,56,0), Chunk: (at 0,3,0 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: 42345 game time, 1000 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 78340 (now: false), thunder time: 18993 (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 coe.v(SourceFile:132)
	at net.minecraft.server.MinecraftServer.run(SourceFile:422)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 14w25b
	Operating System: Windows 8.1 (amd64) version 6.3
	Java Version: 1.8.0, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 2881330576 bytes (2747 MB) / 3170369536 bytes (3023 MB) up to 4772593664 bytes (4551 MB)
	JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx5120m -Xms2560m
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	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.