---- Minecraft Crash Report ----
// Don't do that.

Time: 08/10/16 18:02
Description: Ticking player

java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.remove(HashMap.java:1443)
	at st.bP(SourceFile:515)
	at st.U(SourceFile:310)
	at sk.A_(SourceFile:350)
	at st.A_(SourceFile:1627)
	at aau.A_(SourceFile:270)
	at lx.k_(SourceFile:282)
	at mh.F_(SourceFile:179)
	at er.a(SourceFile:232)
	at mg.c(SourceFile:187)
	at net.minecraft.server.MinecraftServer.D(SourceFile:652)
	at net.minecraft.server.MinecraftServer.C(SourceFile:562)
	at ccb.C(SourceFile:154)
	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 java.util.HashMap$HashIterator.remove(HashMap.java:1443)
	at st.bP(SourceFile:515)
	at st.U(SourceFile:310)
	at sk.A_(SourceFile:350)
	at st.A_(SourceFile:1627)
	at aau.A_(SourceFile:270)

-- Player being ticked --
Details:
	Entity Type: null (lx)
	Entity ID: 22
	Entity Name: DelboyDylan
	Entity's Exact location: -155892.36, 106.00, -7154.42
	Entity's Block location: World: (-155893,106,-7155), Chunk: (at 11,6,13 in -9744,-448; contains blocks -155904,0,-7168 to -155889,255,-7153), Region: (-305,-14; contains chunks -9760,-448 to -9729,-417, blocks -156160,0,-7168 to -155649,255,-6657)
	Entity's Momentum: 0.00, -0.08, 0.00
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at lx.k_(SourceFile:282)
	at mh.F_(SourceFile:179)
	at er.a(SourceFile:232)

-- Ticking connection --
Details:
	Connection: er@4e2c0924
Stacktrace:
	at mg.c(SourceFile:187)
	at net.minecraft.server.MinecraftServer.D(SourceFile:652)
	at net.minecraft.server.MinecraftServer.C(SourceFile:562)
	at ccb.C(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:466)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 16w40a
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 186536768 bytes (177 MB) / 473636864 bytes (451 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: 0, tcache: 0, allocated: 12, tallocated: 94
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [lx['DelboyDylan'/22, l='16w40a', x=-155892.36, y=106.00, z=-7154.42]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.