---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 28/05/18 17:17
Description: Exception generating new chunk

java.util.concurrent.ExecutionException: java.lang.UnsupportedOperationException
	at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2237)
	at sk.c(SourceFile:126)
	at ss.a(SourceFile:84)
	at st.c(SourceFile:143)
	at sl.i_(SourceFile:223)
	at net.minecraft.server.MinecraftServer.w(SourceFile:693)
	at net.minecraft.server.MinecraftServer.v(SourceFile:626)
	at dii.v(SourceFile:156)
	at net.minecraft.server.MinecraftServer.run(SourceFile:531)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.UnsupportedOperationException
	at bpw.a(SourceFile:108)
	at sq.a(SourceFile:232)
	at bus.a(SourceFile:118)
	at bus.a(SourceFile:23)
	at byl.a(SourceFile:20)
	at byl.a(SourceFile:12)
	at bsl.a(SourceFile:27)
	at bby.a(SourceFile:515)
	at bpy.a(SourceFile:109)
	at sz.a(SourceFile:12)
	at sy.a(SourceFile:34)
	at bqc.a(SourceFile:87)
	at te.a(SourceFile:59)
	at te.a(SourceFile:23)
	at agg$a.a(SourceFile:131)
	at agg$a$$Lambda$1551/1584691920.apply(Unknown Source)
	at java.util.concurrent.CompletableFuture$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 sk.a(SourceFile:170)

-- Chunk to be generated --
Details:
	Location: 55,71
	Position hash: 304942678071
	Generator: brt@40d749ab
Stacktrace:
	at sk.a(SourceFile:170)
	at sk.c(SourceFile:129)
	at ss.a(SourceFile:84)
	at st.c(SourceFile:143)
	at sl.i_(SourceFile:223)
	at net.minecraft.server.MinecraftServer.w(SourceFile:693)
	at net.minecraft.server.MinecraftServer.v(SourceFile:626)
	at dii.v(SourceFile:156)
	at net.minecraft.server.MinecraftServer.run(SourceFile:531)
	at java.lang.Thread.run(Thread.java:745)

-- Affected level --
Details:
	Level name: GTM - S02
	All players: 1 total; [sn['Glitch_The_Mole'/461, l='GTM - S02', x=652.11, y=65.00, z=1037.87]]
	Chunk stats: ServerChunkCache: 1218 Drop: 0
	Level seed: -6968998364217797098
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: {}
	Level spawn location: World: (-4,64,-56), Chunk: (at 12,4,8 in -1,-4; contains blocks -16,0,-64 to -1,255,-49), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
	Level time: 1970530 game time, 2810237 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 41825 (now: false), thunder time: 55188 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false

-- System Details --
Details:
	Minecraft Version: 18w21b
	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: 322596232 bytes (307 MB) / 973078528 bytes (928 MB) up to 4294967296 bytes (4096 MB)
	JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -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; [sn['Glitch_The_Mole'/461, l='GTM - S02', x=652.11, y=65.00, z=1037.87]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.