---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 23/12/16 17:12
Description: Ticking entity

java.lang.NullPointerException: Ticking entity
	at sn.al(SourceFile:1023)
	at sn.ak(SourceFile:1009)
	at sw.a(SourceFile:203)
	at sn.a(SourceFile:784)
	at sw.g(SourceFile:1585)
	at sw.n(SourceFile:1870)
	at sx.n(SourceFile:499)
	at aaa.n(SourceFile:41)
	at sw.A_(SourceFile:1703)
	at sx.A_(SourceFile:282)
	at aaa.A_(SourceFile:46)
	at aai.A_(SourceFile:86)
	at ajs.a(SourceFile:1517)
	at lw.a(SourceFile:718)
	at ajs.h(SourceFile:1495)
	at ajs.k(SourceFile:1378)
	at lw.k(SourceFile:551)
	at net.minecraft.server.MinecraftServer.D(SourceFile:634)
	at lh.D(SourceFile:335)
	at net.minecraft.server.MinecraftServer.C(SourceFile:562)
	at net.minecraft.server.MinecraftServer.run(SourceFile:466)
	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 sn.al(SourceFile:1023)
	at sn.ak(SourceFile:1009)
	at sw.a(SourceFile:203)
	at sn.a(SourceFile:784)
	at sw.g(SourceFile:1585)
	at sw.n(SourceFile:1870)
	at sx.n(SourceFile:499)
	at aaa.n(SourceFile:41)
	at sw.A_(SourceFile:1703)
	at sx.A_(SourceFile:282)
	at aaa.A_(SourceFile:46)
	at aai.A_(SourceFile:86)
	at ajs.a(SourceFile:1517)
	at lw.a(SourceFile:718)
	at ajs.h(SourceFile:1495)

-- Entity being ticked --
Details:
	Entity Type: minecraft:spider (aai)
	Entity ID: 6823
	Entity Name: Spider
	Entity's Exact location: ?, ?, ?
	Entity's Block location: World: (?,?,?), Chunk: (at ?,?,? in ?,?; contains blocks ?,?,? to -?,?,?), Region: (?,?; contains chunks ?,? to ?,?, blocks ?,?,? to ?,?,?)
	Entity's Momentum: -0.01, -0.40, 0.00
	Entity's Passengers: [aag['Skeleton'/6824, l='world', x=?, y=?, z=?]]
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at ajs.k(SourceFile:1378)
	at lw.k(SourceFile:551)

-- Affected level --
Details:
	Level name: world
	All players: 23 total; ?
	Chunk stats: ServerChunkCache: 3375 Drop: 0
	Level seed: ?
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (0,21,0), Chunk: (at 0,1,0 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: 38334444 game time, 38267671 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 1 (now: false), thunder time: 1 (now: false)
	Level game mode: Game mode: adventure (ID 2). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.D(SourceFile:634)
	at lh.D(SourceFile:335)
	at net.minecraft.server.MinecraftServer.C(SourceFile:562)
	at net.minecraft.server.MinecraftServer.run(SourceFile:466)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 1.11.1
	Operating System: Linux (amd64) version 4.4.0-47-generic
	Java Version: 1.8.0_111, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 8227683840 bytes (7846 MB) / 10737418240 bytes (10240 MB) up to 17179869184 bytes (16384 MB)
	JVM Flags: 16 total; 
	IntCache: cache: 1, tcache: 1, allocated: 12, tallocated: 94
	Profiler Position: N/A (disabled)
	Player Count: 26 / 88; ?
	Is Modded: Unknown (can't tell)
	Type: Dedicated Server (map_server.txt)