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

	Time: 07.05.2020, 20:56
	Description: Exception generating new chunk

	java.util.ConcurrentModificationException
		at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134)
		at cmo.b(SourceFile:67)
		at cmo.a(SourceFile:57)
		at cij.a(SourceFile:91)
		at cih$c.a(SourceFile:161)
		at cih$c.<init>(SourceFile:98)
		at cih.a(SourceFile:280)
		at cfr.a(SourceFile:26)
		at cfq$a.a(SourceFile:90)
		at caa.a(SourceFile:199)
		at cae.d(SourceFile:51)
		at cae.a(SourceFile:214)
		at wp.a(SourceFile:549)
		at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
		at wp.a(SourceFile:543)
		at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1072)
		at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478)
		at wr.b(SourceFile:58)
		at aiv.e(SourceFile:83)
		at aiv.a(SourceFile:123)
		at aiv.run(SourceFile:91)
		at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1426)
		at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
		at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
		at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
		at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
		at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)


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

	-- Head --
	Thread: Server thread
	Stacktrace:
		at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134)
		at cmo.b(SourceFile:67)
		at cmo.a(SourceFile:57)
		at cij.a(SourceFile:91)
		at cih$c.a(SourceFile:161)
		at cih$c.<init>(SourceFile:98)
		at cih.a(SourceFile:280)
		at cfr.a(SourceFile:26)
		at cfq$a.a(SourceFile:90)
		at caa.a(SourceFile:199)
		at cae.d(SourceFile:51)
		at cae.a(SourceFile:214)

	-- Chunk to be generated --
	Details:
		Location: 137,-17
		Position hash: -73014443895
		Generator: cca@286aaf9c
	Stacktrace:
		at wp.a(SourceFile:549)
		at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
		at wp.a(SourceFile:543)
		at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1072)
		at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478)
		at wr.b(SourceFile:58)
		at aiv.e(SourceFile:83)
		at aiv.a(SourceFile:123)
		at aiv.run(SourceFile:91)
		at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1426)

	-- Affected level --
	Details:
		All players: 1 total; [xe['ArchitectTom'/56, l='CzekamyNaEmilke', x=1792.12, y=11.00, z=-410.48]]
		Chunk stats: ServerChunkCache: 4828
		Level dimension: minecraft:overworld
		Level name: CzekamyNaEmilke
		Level seed: 1069422259
		Level generator: ID 00 - default, ver 1. Features enabled: true
		Level generator options: {}
		Level spawn location: World: (0,63,-200), Chunk: (at 0,3,8 in 0,-13; contains blocks 0,0,-208 to 15,255,-193), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
		Level time: 6778002 game time, 9892613 day time
		Known server brands: vanilla
		Level was modded: false
		Level storage version: 0x04ABD - Anvil
		Level weather: Rain time: 51147 (now: false), thunder time: 35278 (now: false)
		Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
	Stacktrace:
		at net.minecraft.server.MinecraftServer.b(SourceFile:857)
		at net.minecraft.server.MinecraftServer.a(SourceFile:793)
		at edm.a(SourceFile:130)
		at net.minecraft.server.MinecraftServer.run(SourceFile:655)
		at java.base/java.lang.Thread.run(Thread.java:834)

	-- System Details --
	Details:
		Minecraft Version: 1.15.2
		Minecraft Version ID: 1.15.2
		Operating System: Linux (amd64) version 5.3.0-51-generic
		Java Version: 11.0.7, Ubuntu
		Java VM Version: OpenJDK 64-Bit Server VM (mixed mode, sharing), Ubuntu
		Memory: 340876088 bytes (325 MB) / 1174405120 bytes (1120 MB) up to 2147483648 bytes (2048 MB)
		CPUs: 4
		JVM Flags: 8 total; -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
		Player Count: 1 / 8; [xe['ArchitectTom'/56, l='CzekamyNaEmilke', x=1792.12, y=11.00, z=-410.48]]
		Data Packs: vanilla
		Type: Integrated Server (map_client.txt)
		Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.