---- Minecraft Crash Report ----
// My bad.

Time: 07/10/2021 20:22
Description: Exception in server tick loop

java.util.concurrent.CompletionException: net.minecraft.ReportedException: 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 net.minecraft.server.level.ChunkTaskPriorityQueueSorter.void lambda$message$1(java.lang.Runnable,net.minecraft.util.thread.ProcessorHandle)(ChunkTaskPriorityQueueSorter.java:58)
	at net.minecraft.util.thread.ProcessorMailbox.boolean pollTask()(ProcessorMailbox.java:91)
	at net.minecraft.util.thread.ProcessorMailbox.int pollUntil(it.unimi.dsi.fastutil.ints.Int2BooleanFunction)(ProcessorMailbox.java:146)
	at net.minecraft.util.thread.ProcessorMailbox.void run()(ProcessorMailbox.java:102)
	at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1434)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:295)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)
Caused by: net.minecraft.ReportedException: Exception generating new chunk
	at net.minecraft.server.level.ChunkMap.java.util.concurrent.CompletableFuture lambda$scheduleChunkGeneration$20(net.minecraft.world.level.ChunkPos,net.minecraft.server.level.ChunkHolder,net.minecraft.world.level.chunk.ChunkStatus,java.util.concurrent.Executor,java.util.List)(ChunkMap.java:636)
	at com.mojang.datafixers.util.Either$Left.null map(null)(Either.java:38)
	at net.minecraft.server.level.ChunkMap.java.util.concurrent.CompletionStage lambda$scheduleChunkGeneration$22(net.minecraft.world.level.ChunkPos,net.minecraft.server.level.ChunkHolder,net.minecraft.world.level.chunk.ChunkStatus,java.util.concurrent.Executor,com.mojang.datafixers.util.Either)(ChunkMap.java:618)
	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146)
	... 11 more
Caused by: java.lang.ArrayIndexOutOfBoundsException: Index -16776918 out of bounds for length 315
	at net.minecraft.world.level.levelgen.Aquifer$NoiseBasedAquifer.net.minecraft.world.level.levelgen.Aquifer$FluidStatus getAquiferStatus(long)(Aquifer.java:470)
	at net.minecraft.world.level.levelgen.Aquifer$NoiseBasedAquifer.net.minecraft.world.level.block.state.BlockState computeSubstance(int,int,int,double,double)(Aquifer.java:275)
	at net.minecraft.world.level.levelgen.NoiseSampler.net.minecraft.world.level.block.state.BlockState lambda$makeBaseNoiseFiller$10(net.minecraft.world.level.levelgen.NoiseChunk$Sampler,net.minecraft.world.level.levelgen.NoiseChunk$Sampler,net.minecraft.world.level.levelgen.NoiseChunk$Sampler,net.minecraft.world.level.levelgen.NoiseChunk$Sampler,net.minecraft.world.level.levelgen.NoiseChunk$Sampler,net.minecraft.world.level.levelgen.NoiseChunk$NoiseFiller,net.minecraft.world.level.levelgen.NoiseChunk,int,int,int)(NoiseSampler.java:480)
	at net.minecraft.world.level.levelgen.NoiseChunk.net.minecraft.world.level.block.state.BlockState updateNoiseAndGenerateBaseState(int,int,int)(NoiseChunk.java:239)
	at net.minecraft.world.level.levelgen.material.MaterialRuleList.net.minecraft.world.level.block.state.BlockState apply(net.minecraft.world.level.levelgen.NoiseChunk,int,int,int)(MaterialRuleList.java:20)
	at net.minecraft.world.level.levelgen.NoiseBasedChunkGenerator.java.util.OptionalInt iterateNoiseColumn(int,int,net.minecraft.world.level.block.state.BlockState[],java.util.function.Predicate,int,int)(NoiseBasedChunkGenerator.java:269)
	at net.minecraft.world.level.levelgen.NoiseBasedChunkGenerator.net.minecraft.world.level.NoiseColumn getBaseColumn(int,int,net.minecraft.world.level.LevelHeightAccessor)(NoiseBasedChunkGenerator.java:228)
	at net.minecraft.world.level.levelgen.structure.NetherFossilFeature.void generatePieces(net.minecraft.world.level.levelgen.structure.pieces.StructurePiecesBuilder,net.minecraft.world.level.levelgen.feature.configurations.RangeDecoratorConfiguration,net.minecraft.world.level.levelgen.structure.pieces.PieceGenerator$Context)(NetherFossilFeature.java:33)
	at net.minecraft.world.level.levelgen.feature.StructureFeature.net.minecraft.world.level.levelgen.structure.StructureStart generate(net.minecraft.core.RegistryAccess,net.minecraft.world.level.chunk.ChunkGenerator,net.minecraft.world.level.biome.BiomeSource,net.minecraft.world.level.levelgen.structure.templatesystem.StructureManager,long,net.minecraft.world.level.ChunkPos,int,net.minecraft.world.level.levelgen.WorldgenRandom,net.minecraft.world.level.levelgen.feature.configurations.StructureFeatureConfiguration,net.minecraft.world.level.levelgen.feature.configurations.FeatureConfiguration,net.minecraft.world.level.LevelHeightAccessor,java.util.function.Predicate)(StructureFeature.java:253)
	at net.minecraft.world.level.levelgen.feature.ConfiguredStructureFeature.net.minecraft.world.level.levelgen.structure.StructureStart generate(net.minecraft.core.RegistryAccess,net.minecraft.world.level.chunk.ChunkGenerator,net.minecraft.world.level.biome.BiomeSource,net.minecraft.world.level.levelgen.structure.templatesystem.StructureManager,long,net.minecraft.world.level.ChunkPos,int,net.minecraft.world.level.levelgen.feature.configurations.StructureFeatureConfiguration,net.minecraft.world.level.LevelHeightAccessor,java.util.function.Predicate)(ConfiguredStructureFeature.java:39)
	at net.minecraft.world.level.chunk.ChunkGenerator.com.mojang.serialization.Codec codec()(ChunkGenerator.java:371)
	at net.minecraft.world.level.chunk.ChunkGenerator.net.minecraft.world.level.chunk.ChunkGenerator withSeed(long)(ChunkGenerator.java:371)
	at net.minecraft.world.level.chunk.ChunkGenerator.void applyCarvers(net.minecraft.server.level.WorldGenRegion,long,net.minecraft.world.level.biome.BiomeManager,net.minecraft.world.level.StructureFeatureManager,net.minecraft.world.level.chunk.ChunkAccess,net.minecraft.world.level.levelgen.GenerationStep$Carving)(ChunkGenerator.java:371)
	at net.minecraft.world.level.chunk.ChunkGenerator.void buildSurface(net.minecraft.server.level.WorldGenRegion,net.minecraft.world.level.StructureFeatureManager,net.minecraft.world.level.chunk.ChunkAccess)(ChunkGenerator.java:371)
	at net.minecraft.world.level.chunk.ChunkGenerator.void spawnOriginalMobs(net.minecraft.server.level.WorldGenRegion)(ChunkGenerator.java:371)
	at net.minecraft.world.level.chunk.ChunkGenerator.void createStructures(net.minecraft.core.RegistryAccess,net.minecraft.world.level.StructureFeatureManager,net.minecraft.world.level.chunk.ChunkAccess,net.minecraft.world.level.levelgen.structure.templatesystem.StructureManager,long)(ChunkGenerator.java:371)
	at net.minecraft.world.level.chunk.ChunkGenerator.java.util.concurrent.CompletableFuture fillFromNoise(java.util.concurrent.Executor,net.minecraft.world.level.StructureFeatureManager,net.minecraft.world.level.chunk.ChunkAccess)(ChunkGenerator.java:371)
	at net.minecraft.world.level.chunk.ChunkGenerator.int getBaseHeight(int,int,net.minecraft.world.level.levelgen.Heightmap$Types,net.minecraft.world.level.LevelHeightAccessor)(ChunkGenerator.java:371)
	at net.minecraft.world.level.chunk.ChunkGenerator.net.minecraft.world.level.NoiseColumn getBaseColumn(int,int,net.minecraft.world.level.LevelHeightAccessor)(ChunkGenerator.java:371)
	at net.minecraft.world.level.chunk.ChunkStatus.java.util.concurrent.CompletableFuture lambda$static$2(net.minecraft.world.level.chunk.ChunkStatus,java.util.concurrent.Executor,net.minecraft.server.level.ServerLevel,net.minecraft.world.level.chunk.ChunkGenerator,net.minecraft.world.level.levelgen.structure.templatesystem.StructureManager,net.minecraft.server.level.ThreadedLevelLightEngine,java.util.function.Function,java.util.List,net.minecraft.world.level.chunk.ChunkAccess,boolean)(ChunkStatus.java:55)
	at net.minecraft.world.level.chunk.ChunkStatus.java.util.concurrent.CompletableFuture generate(java.util.concurrent.Executor,net.minecraft.server.level.ServerLevel,net.minecraft.world.level.chunk.ChunkGenerator,net.minecraft.world.level.levelgen.structure.templatesystem.StructureManager,net.minecraft.server.level.ThreadedLevelLightEngine,java.util.function.Function,java.util.List,boolean)(ChunkStatus.java:249)
	at net.minecraft.server.level.ChunkMap.java.util.concurrent.CompletableFuture lambda$scheduleChunkGeneration$20(net.minecraft.world.level.ChunkPos,net.minecraft.server.level.ChunkHolder,net.minecraft.world.level.chunk.ChunkStatus,java.util.concurrent.Executor,java.util.List)(ChunkMap.java:624)
	... 14 more


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

-- System Details --
Details:
	Minecraft Version: 21w40a
	Minecraft Version ID: 21w40a
	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: 966990000 bytes (922 MiB) / 1979711488 bytes (1888 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): 11684,52
	Swap memory total (MB): 5376,00
	Swap memory used (MB): 969,75
	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.