---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!Time: 18.05.19 19:20
Description: Exception ticking worldjava.lang.ArrayIndexOutOfBoundsException: -1
	at it.unimi.dsi.fastutil.longs.LongOpenHashSet.rehash(LongOpenHashSet.java:603)
	at it.unimi.dsi.fastutil.longs.LongOpenHashSet.removeEntry(LongOpenHashSet.java:344)
	at it.unimi.dsi.fastutil.longs.LongOpenHashSet.remove(LongOpenHashSet.java:370)
	at ckr.c(SourceFile:327)
	at ckp.b(SourceFile:248)
	at cks.b(SourceFile:150)
	at vj.a(SourceFile:139)
	at vj$$Lambda$2706/749977045.get(Unknown Source)
	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1582)
	at vj.b(SourceFile:176)
	at vj.c(SourceFile:149)
	at vj$$Lambda$2703/1215027772.run(Unknown Source)
	at agn.e(SourceFile:83)
	at agn.a(SourceFile:123)
	at agn.run(SourceFile:91)
	at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402)
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1689)
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)
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.longs.LongOpenHashSet.rehash(LongOpenHashSet.java:603)
	at it.unimi.dsi.fastutil.longs.LongOpenHashSet.removeEntry(LongOpenHashSet.java:344)
	at it.unimi.dsi.fastutil.longs.LongOpenHashSet.remove(LongOpenHashSet.java:370)
	at ckr.c(SourceFile:327)
	at ckp.b(SourceFile:248)
	at cks.b(SourceFile:150)
	at vj.a(SourceFile:139)
	at vj$$Lambda$2706/749977045.get(Unknown Source)
	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1582)
	at vj.b(SourceFile:176)
	at vj.c(SourceFile:149)
	at vj$$Lambda$2703/1215027772.run(Unknown Source)
	at agn.e(SourceFile:83)
	at agn.a(SourceFile:123)
	at agn.run(SourceFile:91)-- Affected level --
Details:
	Level name: 1.14.2
	All players: 1 total; [vh['Marsmaennchen221'/78000, l='1.14.2', x=-270.24, y=100.00, z=-140.07]]
	Chunk stats: ServerChunkCache: 6240
	Level seed: -8618579819919280001
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: {}
	Level spawn location: World: (-176,67,-160), Chunk: (at 0,4,0 in -11,-10; contains blocks -176,0,-160 to -161,255,-145), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
	Level time: 156810 game time, 243747 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 22485 (now: false), thunder time: 91726 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.b(SourceFile:830)
	at net.minecraft.server.MinecraftServer.a(SourceFile:764)
	at dxk.a(SourceFile:128)
	at net.minecraft.server.MinecraftServer.run(SourceFile:632)
	at java.lang.Thread.run(Thread.java:745)-- System Details --
Details:
	Minecraft Version: 1.14.2 Pre-Release 2
	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: 607521280 bytes (579 MB) / 1979711488 bytes (1888 MB) up to 2147483648 bytes (2048 MB)
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	Player Count: 1 / 8; [vh['Marsmaennchen221'/78000, l='1.14.2', x=-270.24, y=100.00, z=-140.07]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.