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MC-241956

Game crashes or fails to save chunks // Error: java.util.concurrent.CompletionException: z: Accessing PalettedContainer from multiple threads

The game crashed whilst exploring the world, vanilla 1.18 pre-release 4 I've attached the crash log and full game log.

---- 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

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abfielder

(Unassigned)

Confirmed

Very Important

Crash

21w43a, 1.18 Pre-release 4, 1.18 Pre-release 5

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