---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 21/02/18 17:51
Description: Exception generating new chunk

java.util.concurrent.ExecutionException: java.lang.ArrayIndexOutOfBoundsException: 6845
	at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2237)
	at rw.c(SourceFile:129)
	at atq.c(SourceFile:309)
	at atq.p(SourceFile:305)
	at atq.b(SourceFile:716)
	at atq.c(SourceFile:245)
	at atq.l(SourceFile:229)
	at bif.b(SourceFile:61)
	at rx.b(SourceFile:795)
	at rx.a(SourceFile:731)
	at cwp.a(SourceFile:98)
	at cwp.d(SourceFile:131)
	at net.minecraft.server.MinecraftServer.run(SourceFile:502)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 6845
	at it.unimi.dsi.fastutil.longs.Long2LongLinkedOpenHashMap$MapIterator.nextEntry(Long2LongLinkedOpenHashMap.java:1207)
	at it.unimi.dsi.fastutil.longs.Long2LongLinkedOpenHashMap$EntryIterator.next(Long2LongLinkedOpenHashMap.java:1299)
	at it.unimi.dsi.fastutil.longs.Long2LongLinkedOpenHashMap$EntryIterator.next(Long2LongLinkedOpenHashMap.java:1288)
	at atj.a(SourceFile:25)
	at atj.get(SourceFile:49)
	at it.unimi.dsi.fastutil.longs.AbstractLong2ObjectFunction.get(AbstractLong2ObjectFunction.java:148)
	at java.util.Map.computeIfAbsent(Map.java:955)
	at sp.a(SourceFile:42)
	at sp.a(SourceFile:23)
	at zl.c(SourceFile:102)
	at rw.d(SourceFile:153)
	at bmt.a(SourceFile:226)
	at bmt.a(SourceFile:76)
	at bot.a(SourceFile:16)
	at bot.a(SourceFile:13)
	at bjk.a(SourceFile:27)
	at auh.a(SourceFile:450)
	at bip.a(SourceFile:143)
	at sk.a(SourceFile:12)
	at sj.a(SourceFile:33)
	at bhh.a(SourceFile:85)
	at sp.a(SourceFile:54)
	at sp.a(SourceFile:23)
	at zl$a.a(SourceFile:143)
	at zl$a$$Lambda$883/1352050374.apply(Unknown Source)
	at java.util.concurrent.CompletableFuture$AsyncApply.exec(CompletableFuture.java:501)
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:902)
	at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1689)
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1644)
	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 rw.a(SourceFile:178)

-- Chunk to be generated --
Details:
	Location: 7,-34
	Position hash: -146028888057
	Generator: bip@2a9411c1
Stacktrace:
	at rw.a(SourceFile:178)
	at rw.c(SourceFile:132)
	at atq.c(SourceFile:309)
	at atq.p(SourceFile:305)
	at atq.b(SourceFile:716)
	at atq.c(SourceFile:245)
	at atq.l(SourceFile:229)
	at bif.b(SourceFile:61)
	at rx.b(SourceFile:795)
	at rx.a(SourceFile:731)
	at cwp.a(SourceFile:98)
	at cwp.d(SourceFile:131)
	at net.minecraft.server.MinecraftServer.run(SourceFile:502)
	at java.lang.Thread.run(Thread.java:745)

-- Affected level --
Details:
	Level name: Everything new in 1.13
	All players: 0 total; []
	Chunk stats: ServerChunkCache: 426 Drop: 0
	Level seed: -135040284280872793
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 
	Level spawn location: World: (0,0,0), Chunk: (at 0,0,0 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: 0 game time, 0 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true

-- System Details --
Details:
	Minecraft Version: 18w08a
	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: 92093360 bytes (87 MB) / 251658240 bytes (240 MB) up to 1073741824 bytes (1024 MB)
	JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
	Profiler Position: N/A (disabled)
	Player Count: 0 / 8; []
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.