---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 30.07.14 23:04
Description: Executing command block

java.lang.NullPointerException: Executing command block
	at java.util.Collections.addAll(Unknown Source)
	at ah.b(SourceFile:161)
	at ab.a(SourceFile:48)
	at aps.a(SourceFile:98)
	at aty.c(SourceFile:53)
	at qo.a(SourceFile:527)
	at qo.c(SourceFile:199)
	at net.minecraft.server.MinecraftServer.y(SourceFile:598)
	at net.minecraft.server.MinecraftServer.x(SourceFile:530)
	at cxc.x(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:446)
	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 ah.b(SourceFile:161)
	at ab.a(SourceFile:48)

-- Command to be executed --
Details:
	Command: /execute @e ~ ~ ~ detect ~ ~-1 ~ tnt 0 /setblock ~ ~ ~ fire
	Name: @
Stacktrace:
	at aps.a(SourceFile:98)
	at aty.c(SourceFile:53)

-- Block being ticked --
Details:
	Block: minecraft:command_block[triggered=true]
	Block location: World: (30,106,143), Chunk: (at 14,6,15 in 1,8; contains blocks 16,0,128 to 31,255,143), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at qo.a(SourceFile:527)
	at qo.c(SourceFile:199)

-- Affected level --
Details:
	Level name: Neue Welt
	All players: 0 total; []
	Chunk stats: ServerChunkCache: 527 Drop: 85
	Level seed: 846094625250784519
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 3;minecraft:bedrock,59*minecraft:sandstone,40*minecraft:air,minecraft:tnt;1;stronghold,village,dungeon,mineshaft
	Level spawn location: 31,00,4,00,144,00 - World: (31,4,144), Chunk: (at 15,0,0 in 1,9; contains blocks 16,0,144 to 31,255,159), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 5644 game time, 5644 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 123391 (now: false), thunder time: 116469 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.y(SourceFile:598)
	at net.minecraft.server.MinecraftServer.x(SourceFile:530)
	at cxc.x(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:446)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 14w31a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.6.0_45, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
	Memory: 581988400 bytes (555 MB) / 1060372480 bytes (1011 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 5, tcache: 86, allocated: 12, tallocated: 94
	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.