---- Minecraft Crash Report ----
// You're mean.

Time: 12/3/15 12:14 AM
Description: Exception ticking world entities

java.util.ConcurrentModificationException
	at java.util.WeakHashMap$HashIterator.nextEntry(WeakHashMap.java:762)
	at java.util.WeakHashMap$KeyIterator.next(WeakHashMap.java:795)
	at vc.a(SourceFile:25)
	at ahn.a(SourceFile:373)
	at ahn.k(SourceFile:1413)
	at lp.k(SourceFile:552)
	at net.minecraft.server.MinecraftServer.D(SourceFile:625)
	at net.minecraft.server.MinecraftServer.C(SourceFile:553)
	at bxz.C(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:457)
	at java.lang.Thread.run(Thread.java:695)


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

-- Head --
Stacktrace:
	at java.util.WeakHashMap$HashIterator.nextEntry(WeakHashMap.java:762)
	at java.util.WeakHashMap$KeyIterator.next(WeakHashMap.java:795)
	at vc.a(SourceFile:25)
	at ahn.a(SourceFile:373)
	at ahn.k(SourceFile:1413)
	at lp.k(SourceFile:552)

-- Affected level --
Details:
	Level name: ¤6¤o~ The Last King of ¤b¤oTyre ¤6¤o~ ¤r[Dev]
	All players: 1 total; [lr['Avantir_Yihn'/5, l='¤6¤o~ The Last King of ¤b¤oTyre ¤6¤o~ ¤r[Dev]', x=80.55, y=48.84, z=-33.15]]
	Chunk stats: ServerChunkCache: 591 Drop: 0
	Level seed: -375471377024323490
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 3;20*minecraft:water;1;
	Level spawn location: World: (-888,21,-728), Chunk: (at 8,1,8 in -56,-46; contains blocks -896,0,-736 to -881,255,-721), Region: (-2,-2; contains chunks -64,-64 to -33,-33, blocks -1024,0,-1024 to -513,255,-513)
	Level time: 19283309 game time, 12750 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.D(SourceFile:625)
	at net.minecraft.server.MinecraftServer.C(SourceFile:553)
	at bxz.C(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:457)
	at java.lang.Thread.run(Thread.java:695)

-- System Details --
Details:
	Minecraft Version: 15w49a
	Operating System: Mac OS X (x86_64) version 10.9.5
	Java Version: 1.6.0_65, Apple Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
	Memory: 250054544 bytes (238 MB) / 503463936 bytes (480 MB) up to 4281597952 bytes (4083 MB)
	JVM Flags: 5 total; -Xmx4G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [lr['Avantir_Yihn'/5, l='¤6¤o~ The Last King of ¤b¤oTyre ¤6¤o~ ¤r[Dev]', x=80.55, y=48.84, z=-33.15]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.