---- Minecraft Crash Report ----
// On the bright side, I bought you a teddy bear!

Time: 28.02.13 15:03
Description: Exception ticking world

java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(Unknown Source)
	at java.util.HashMap$KeyIterator.next(Unknown Source)
	at aae.a(SourceFile:72)
	at iy.b(SourceFile:118)
	at net.minecraft.server.MinecraftServer.r(SourceFile:454)
	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
	at bix.q(SourceFile:122)
	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
	at go.run(SourceFile:573)


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

-- Head --
Stacktrace:
	at java.util.HashMap$HashIterator.nextEntry(Unknown Source)
	at java.util.HashMap$KeyIterator.next(Unknown Source)
	at aae.a(SourceFile:72)
	at iy.b(SourceFile:118)

-- Affected level --
Details:
	Level name: Neue Welt
	All players: 1 total; [jb['iMeta'/90314, l='Neue Welt', x=-312,84, y=3,00, z=1335,90]]
	Chunk stats: ServerChunkCache: 1503 Drop: 0
	Level seed: -4838064915406635899
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 2;46,12,70;1;village
	Level spawn location: World: (-385,4,836), Chunk: (at 15,0,4 in -25,52; contains blocks -400,0,832 to -385,255,847), Region: (-1,1; contains chunks -32,32 to -1,63, blocks -512,0,512 to -1,255,1023)
	Level time: 2860 game time, 2860 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 84716 (now: false), thunder time: 86383 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.r(SourceFile:454)
	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
	at bix.q(SourceFile:122)
	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
	at go.run(SourceFile:573)

-- System Details --
Details:
	Minecraft Version: 13w09b
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_09, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 5706062600 bytes (5441 MB) / 8039104512 bytes (7666 MB) up to 8039104512 bytes (7666 MB)
	JVM Flags: 2 total; -Xms8000m -Xmx8000m
	AABB Pool Size: 2826 (158256 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 71
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 16258 (910448 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Player Count: 1 / 8; [jb['iMeta'/90314, l='Neue Welt', x=-312,84, y=3,00, z=1335,90]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Very likely; Jar signature invalidated