---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 05/10/2021 12:19
Description: Exception in server tick loop

java.util.concurrent.CompletionException: z: Exception generating new chunk
	at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:314)
	at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:319)
	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1155)
	at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478)
	at abr.b(SourceFile:58)
	at ata.g(SourceFile:91)
	at ata.a(SourceFile:146)
	at ata.run(SourceFile:102)
	at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1434)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:295)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)
Caused by: z: Exception generating new chunk
	at abp.a(SourceFile:636)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at abp.a(SourceFile:618)
	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146)
	... 11 more
Caused by: java.lang.ArrayIndexOutOfBoundsException: Index 536871214 out of bounds for length 315
	at crl$c.a(SourceFile:412)
	at crl$c.a(SourceFile:265)
	at csd.a(SourceFile:478)
	at csa.a(SourceFile:239)
	at dbp.apply(SourceFile:20)
	at crz.a(SourceFile:258)
	at crz.a(SourceFile:217)
	at ddr.a(SourceFile:33)
	at cwo.a(SourceFile:251)
	at cuc.a(SourceFile:37)
	at cou.a(SourceFile:369)
	at cow.f(SourceFile:55)
	at cow.a(SourceFile:249)
	at abp.a(SourceFile:624)
	... 14 more


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
	Minecraft Version: 21w39a
	Minecraft Version ID: Minecraft.Server / f7d695aa1ba843f2aa0cbc2ece6aea49
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 16.0.1, Microsoft
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
	Memory: 860145632 bytes (820 MiB) / 2147483648 bytes (2048 MiB) up to 2147483648 bytes (2048 MiB)
	CPUs: 8
	Processor Vendor: GenuineIntel
	Processor Name: Intel(R) Core(TM) i5-8265U CPU @ 1.60GHz
	Identifier: Intel64 Family 6 Model 142 Stepping 12
	Microarchitecture: whiskey Lake
	Frequency (GHz): 1,80
	Number of physical packages: 1
	Number of physical CPUs: 4
	Number of logical CPUs: 8
	Graphics card #0 name: NVIDIA GeForce MX110
	Graphics card #0 vendor: NVIDIA (0x10de)
	Graphics card #0 VRAM (MB): 2048,00
	Graphics card #0 deviceId: 0x174e
	Graphics card #0 versionInfo: DriverVersion=30.0.14.7196
	Graphics card #1 name: Intel(R) UHD Graphics 610
	Graphics card #1 vendor: Intel Corporation (0x8086)
	Graphics card #1 VRAM (MB): 1024,00
	Graphics card #1 deviceId: 0x3ea1
	Graphics card #1 versionInfo: DriverVersion=27.20.100.8729
	Memory slot #0 capacity (MB): 4096,00
	Memory slot #0 clockSpeed (GHz): 2,40
	Memory slot #0 type: DDR4
	Memory slot #1 capacity (MB): 4096,00
	Memory slot #1 clockSpeed (GHz): 2,40
	Memory slot #1 type: DDR4
	Virtual memory max (MB): 13448,24
	Virtual memory used (MB): 9986,87
	Swap memory total (MB): 5376,00
	Swap memory used (MB): 650,20
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	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.