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  1. Minecraft: Java Edition
  2. MC-241778

Game crashes or freeze when loading and upgrading the 1.17.1 version of the Superflat world // java.util.concurrent.CompletionException: z: Biome decoration

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Details

    • Bug
    • Resolution: Fixed
    • 1.18 Pre-release 4
    • 1.18 Pre-release 3
    • None
    • Confirmed
    • Crash

    Description

      Game crashes or freeze when loading and upgrading the 1.17.1 version of the Superflat world.

      Crash report
      Description: Exception in server tick loop
      
      java.util.concurrent.CompletionException: z: Biome decoration
      	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: Biome decoration
      	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.IndexOutOfBoundsException: Index 0 out of bounds for length 0
      	at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64)
      	at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70)
      	at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266)
      	at java.base/java.util.Objects.checkIndex(Objects.java:359)
      	at java.base/java.util.ArrayList.get(ArrayList.java:427)
      	at cpz.a(SourceFile:303)
      	at cqb.c(SourceFile:146)
      	at cqb.a(SourceFile:289)
      	at acv.a(SourceFile:627)
      	... 14 more
      

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              Unassigned Unassigned
              Les3awe [Mod] Les3awe
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              Dates

                Created:
                Updated:
                Resolved:
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