---- Minecraft Crash Report ----
// Oops.

Time: 8/26/18 10:11 PM
Description: Exception generating new chunk

java.util.concurrent.CompletionException: java.lang.ArrayIndexOutOfBoundsException: 16
	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
	at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:604)
	at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
	at java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:443)
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 16
	at bnq.a(SourceFile:87)
	at bnq.e(SourceFile:496)
	at bxa.a(SourceFile:269)
	at bxg$g.a(SourceFile:881)
	at bxb.a(SourceFile:62)
	at btk.a(SourceFile:78)
	at bvp.a(SourceFile:16)
	at bvp.a(SourceFile:13)
	at bpm.a(SourceFile:27)
	at ayt.a(SourceFile:504)
	at boo.a(SourceFile:183)
	at tr.a(SourceFile:12)
	at tq.a(SourceFile:35)
	at bnc.a(SourceFile:95)
	at tx.a(SourceFile:79)
	at tx.a(SourceFile:25)
	at acu$a.a(SourceFile:147)
	at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602)
	... 6 more


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

-- Head --
Thread: Server thread
Stacktrace:
	at tc.a(SourceFile:159)

-- Chunk to be generated --
Details:
	Location: -21,2
	Position hash: 12884901867
	Generator: boo@20cd7642
Stacktrace:
	at tc.a(SourceFile:159)
	at tc.a(SourceFile:124)
	at tk.a(SourceFile:87)
	at tl.c(SourceFile:123)
	at td.a(SourceFile:219)
	at net.minecraft.server.MinecraftServer.b(SourceFile:747)
	at net.minecraft.server.MinecraftServer.a(SourceFile:681)
	at dgg.a(SourceFile:131)
	at net.minecraft.server.MinecraftServer.run(SourceFile:584)
	at java.lang.Thread.run(Thread.java:745)

-- Affected level --
Details:
	Level name: flattest
	All players: 1 total; [tf['XerxesTireIron'/0, l='flattest', x=-119.50, y=256.72, z=-73.50]]
	Chunk stats: ServerChunkCache: 728 Drop: 0
	Level seed: 8137282236239147792
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: {biome:"minecraft:plains",layers:[{block:"minecraft:bedrock",height:1b},{block:"minecraft:dirt",height:250s},{block:"minecraft:grass_block",height:1b}],structures:{village:{}}}
	Level spawn location: World: (-112,252,-64), Chunk: (at 0,15,0 in -7,-4; contains blocks -112,0,-64 to -97,255,-49), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
	Level time: 38 game time, 38 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 129450 (now: false), thunder time: 23772 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true

-- System Details --
Details:
	Minecraft Version: 1.13.1
	Operating System: Mac OS X (x86_64) version 10.12.6
	Java Version: 1.8.0_74, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 1081556248 bytes (1031 MB) / 1845493760 bytes (1760 MB) up to 2147483648 bytes (2048 MB)
	JVM Flags: 8 total; -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [tf['XerxesTireIron'/0, l='flattest', x=-119.50, y=256.72, z=-73.50]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.