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

Time: 7/25/18 11:47 AM
Description: Exception ticking world entities

java.lang.ArrayIndexOutOfBoundsException: -1
	at it.unimi.dsi.fastutil.objects.ObjectLinkedOpenHashSet.fixPointers(ObjectLinkedOpenHashSet.java:851)
	at it.unimi.dsi.fastutil.objects.ObjectLinkedOpenHashSet$SetIterator.remove(ObjectLinkedOpenHashSet.java:1057)
	at axu.l(SourceFile:1118)
	at tc.l(SourceFile:493)
	at net.minecraft.server.MinecraftServer.b(SourceFile:736)
	at net.minecraft.server.MinecraftServer.a(SourceFile:661)
	at dfz.a(SourceFile:158)
	at net.minecraft.server.MinecraftServer.run(SourceFile:564)
	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 it.unimi.dsi.fastutil.objects.ObjectLinkedOpenHashSet.fixPointers(ObjectLinkedOpenHashSet.java:851)
	at it.unimi.dsi.fastutil.objects.ObjectLinkedOpenHashSet$SetIterator.remove(ObjectLinkedOpenHashSet.java:1057)
	at axu.l(SourceFile:1118)
	at tc.l(SourceFile:493)

-- Affected level --
Details:
	Level name: single player survival
	All players: 1 total; [te['IceDragon029'/153, l='single player survival', x=-1024.85, y=64.00, z=414.28]]
	Chunk stats: ServerChunkCache: 612 Drop: 0
	Level seed: 6673606587472200654
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: {}
	Level spawn location: World: (-80,63,251), Chunk: (at 0,3,11 in -5,15; contains blocks -80,0,240 to -65,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 1456916 game time, 1918713 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 119402 (now: false), thunder time: 116748 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.b(SourceFile:736)
	at net.minecraft.server.MinecraftServer.a(SourceFile:661)
	at dfz.a(SourceFile:158)
	at net.minecraft.server.MinecraftServer.run(SourceFile:564)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 18w30a
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_51, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 888352480 bytes (847 MB) / 2684354560 bytes (2560 MB) up to 4294967296 bytes (4096 MB)
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx4G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [te['IceDragon029'/153, l='single player survival', x=-1024.85, y=64.00, z=414.28]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.