---- Minecraft Crash Report ----
// Why did you do that?

Time: 5/20/16 12:20 AM
Description: Ticking entity

java.lang.ArrayIndexOutOfBoundsException: 1
	at aze.f(SourceFile:71)
	at xn.k(SourceFile:68)
	at xn.j(SourceFile:63)
	at xn.c(SourceFile:24)
	at wy.n(SourceFile:238)
	at sc.m(SourceFile:1631)
	at sd.m(SourceFile:277)
	at aia.a(SourceFile:1520)
	at lr.a(SourceFile:718)
	at aia.g(SourceFile:1498)
	at aia.k(SourceFile:1388)
	at lr.k(SourceFile:551)
	at net.minecraft.server.MinecraftServer.D(SourceFile:626)
	at net.minecraft.server.MinecraftServer.C(SourceFile:554)
	at bzg.C(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:458)
	at java.lang.Thread.run(Thread.java:745)


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

-- Head --
Thread: Server thread
Stacktrace:
	at aze.f(SourceFile:71)
	at xn.k(SourceFile:68)
	at xn.j(SourceFile:63)
	at xn.c(SourceFile:24)
	at wy.n(SourceFile:238)
	at sc.m(SourceFile:1631)
	at sd.m(SourceFile:277)
	at aia.a(SourceFile:1520)
	at lr.a(SourceFile:718)
	at aia.g(SourceFile:1498)

-- Entity being ticked --
Details:
	Entity Type: EnderDragon (wy)
	Entity ID: 125176
	Entity Name: Ender Dragon
	Entity's Exact location: 18.13, 25.50, -41.19
	Entity's Block location: World: (18,25,-42), Chunk: (at 2,1,6 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)
	Entity's Momentum: 0.80, 0.11, -0.51
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at aia.k(SourceFile:1388)
	at lr.k(SourceFile:551)

-- Affected level --
Details:
	Level name: New World
	All players: 1 total; [lt['lvhz'/8, l='New World', x=-0.80, y=4.00, z=1.74]]
	Chunk stats: ServerChunkCache: 1097 Drop: 0
	Level seed: -857786263812608060
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 
	Level spawn location: World: (-937,4,893), Chunk: (at 7,0,13 in -59,55; contains blocks -944,0,880 to -929,255,895), Region: (-2,1; contains chunks -64,32 to -33,63, blocks -1024,0,512 to -513,255,1023)
	Level time: 700 game time, 700 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 119449 (now: false), thunder time: 66937 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.D(SourceFile:626)
	at net.minecraft.server.MinecraftServer.C(SourceFile:554)
	at bzg.C(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:458)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 16w20a
	Operating System: Mac OS X (x86_64) version 10.10.3
	Java Version: 1.8.0_45, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 125932496 bytes (120 MB) / 344784896 bytes (328 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 5 total; -Xmx1G -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; [lt['lvhz'/8, l='New World', x=-0.80, y=4.00, z=1.74]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.