---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 11.02.18 11:31
Description: Exception generating new chunk

java.util.concurrent.ExecutionException: java.lang.ClassCastException: axc cannot be cast to azb
	at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2237)
	at rz.c(SourceFile:130)
	at atm.c(SourceFile:311)
	at atm.p(SourceFile:307)
	at atm.b(SourceFile:718)
	at atm.c(SourceFile:247)
	at atm.l(SourceFile:231)
	at bho.b(SourceFile:61)
	at sa.b(SourceFile:824)
	at sa.a(SourceFile:760)
	at cvl.a(SourceFile:98)
	at cvl.d(SourceFile:131)
	at net.minecraft.server.MinecraftServer.run(SourceFile:503)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassCastException: axc cannot be cast to azb
	at sf.f(SourceFile:169)
	at bpl.a(SourceFile:221)
	at bpl.b(SourceFile:175)
	at bpl.a(SourceFile:171)
	at boo.a(SourceFile:63)
	at bpa.a(SourceFile:57)
	at bly.a(SourceFile:92)
	at bny.a(SourceFile:16)
	at bny.a(SourceFile:13)
	at bit.a(SourceFile:27)
	at aud.a(SourceFile:416)
	at bhz.b(SourceFile:142)
	at sn.a(SourceFile:13)
	at sm.a(SourceFile:34)
	at bgq.a(SourceFile:89)
	at sr.a(SourceFile:54)
	at sr.a(SourceFile:23)
	at zo$a.a(SourceFile:143)
	at zo$a$$Lambda$875/621712682.apply(Unknown Source)
	at java.util.concurrent.CompletableFuture$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 rz.a(SourceFile:180)

-- Chunk to be generated --
Details:
	Location: 5,19
	Position hash: 81604378629
	Generator: bhz@32144cb8
Stacktrace:
	at rz.a(SourceFile:180)
	at rz.c(SourceFile:133)
	at atm.c(SourceFile:311)
	at atm.p(SourceFile:307)
	at atm.b(SourceFile:718)
	at atm.c(SourceFile:247)
	at atm.l(SourceFile:231)
	at bho.b(SourceFile:61)
	at sa.b(SourceFile:824)
	at sa.a(SourceFile:760)
	at cvl.a(SourceFile:98)
	at cvl.d(SourceFile:131)
	at net.minecraft.server.MinecraftServer.run(SourceFile:503)
	at java.lang.Thread.run(Thread.java:745)

-- Affected level --
Details:
	Level name: New World
	All players: 0 total; []
	Chunk stats: ServerChunkCache: 60 Drop: 0
	Level seed: 5528506469950641626
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: minecraft:stone,minecraft:sand,2*minecraft:air,minecraft:stone;2;biome_1,decoration
	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: 18w06a
	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: 168632736 bytes (160 MB) / 335544320 bytes (320 MB) up to 4294967296 bytes (4096 MB)
	JVM Flags: 7 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -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.