---- Minecraft Crash Report ---- // There are four lights! Time: 19/11/2021, 14:22 Description: Exception in server tick loop java.util.concurrent.CompletionException: z: Accessing PalettedContainer from multiple threads at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:315) at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:320) at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1159) at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482) at acx.b(SourceFile:58) at auk.g(SourceFile:91) at auk.a(SourceFile:146) at auk.run(SourceFile:102) at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1395) at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373) at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182) at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655) at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622) at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165) Caused by: z: Accessing PalettedContainer from multiple threads at acv.a(SourceFile:639) at com.mojang.datafixers.util.Either$Left.map(Either.java:38) at acv.a(SourceFile:621) at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1150) ... 11 more Caused by: java.lang.IllegalStateException at ajj.a(SourceFile:27) at ajj.a(SourceFile:19) at cqp.a(SourceFile:55) at cqj.a(SourceFile:58) at cpw.a(SourceFile:35) at it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap.computeIfAbsent(Long2ObjectOpenHashMap.java:499) at cpw.a(SourceFile:32) at cxm.a(SourceFile:150) at cxm.a(SourceFile:52) at cvt.a(SourceFile:80) at ddu.a(SourceFile:56) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276) at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276) at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.IntPipeline$1$1.accept(IntPipeline.java:180) at java.base/java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:104) at java.base/java.util.Spliterator$OfInt.forEachRemaining(Spliterator.java:711) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276) at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at ddu.a(SourceFile:55) at ddu.b(SourceFile:44) at cpz.a(SourceFile:310) at cqb.c(SourceFile:146) at cqb.a(SourceFile:289) at acv.a(SourceFile:627) ... 14 more A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- System Details -- Details: Minecraft Version: 1.18 Pre-release 4 Minecraft Version ID: 1.18-pre4 Operating System: Windows 10 (amd64) version 10.0 Java Version: 17.0.1, Microsoft Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft Memory: 1615789512 bytes (1540 MiB) / 4932501504 bytes (4704 MiB) up to 6442450944 bytes (6144 MiB) CPUs: 12 Processor Vendor: GenuineIntel Processor Name: Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz Identifier: Intel64 Family 6 Model 158 Stepping 10 Microarchitecture: Coffee Lake Frequency (GHz): 3.70 Number of physical packages: 1 Number of physical CPUs: 6 Number of logical CPUs: 12 Graphics card #0 name: NVIDIA GeForce RTX 3080 Graphics card #0 vendor: NVIDIA (0x10de) Graphics card #0 VRAM (MB): 4095.00 Graphics card #0 deviceId: 0x2216 Graphics card #0 versionInfo: DriverVersion=30.0.14.7196 Memory slot #0 capacity (MB): 16384.00 Memory slot #0 clockSpeed (GHz): 2.67 Memory slot #0 type: DDR4 Memory slot #1 capacity (MB): 16384.00 Memory slot #1 clockSpeed (GHz): 2.67 Memory slot #1 type: DDR4 Virtual memory max (MB): 49080.70 Virtual memory used (MB): 37582.27 Swap memory total (MB): 16384.00 Swap memory used (MB): 217.65 JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx6G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M Player Count: 1 / 8; [adj['abfielder'/31870, l='ServerLevel[-5596631996663293324]', x=-137.83, y=165.79, z=48.22]] Data Packs: vanilla Type: Integrated Server (map_client.txt) Is Modded: Probably not. Client jar signature and brand is untouched; Server jar signature and brand is untouched