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  1. Minecraft: Java Edition
  2. MC-236752

java.lang.NullPointerException when generating configured feature

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    • Icon: Bug Bug
    • Resolution: Cannot Reproduce
    • None
    • 1.17.1
    • None
    • Windows 10
    • Unconfirmed
    • Crash

      Minecraft crashed when I traveled to my custom dimension after making changes to cobweb_patch.json, which (if working correctly) would generate a patch of cobwebs in a biome made of soul sand. Specifically, I was attempting to get the cobweb patches to generate at surface level like my trees are. I won't upload a full data pack specifically for testing the issue, but hopefully the stack trace and the JSON file in question should give some insight into what might be causing the problem. (Edit: switching from vegetation_patch to random_patch fixed the crash and got the cobweb patches spawning correctly.)

      Encountered an unexpected exception
      z: Feature placement
      	at net.minecraft.server.MinecraftServer.b(SourceFile:895)
      	at net.minecraft.server.MinecraftServer.a(SourceFile:831)
      	at faq.a(SourceFile:96)
      	at net.minecraft.server.MinecraftServer.x(SourceFile:697)
      	at net.minecraft.server.MinecraftServer.a(SourceFile:270)
      	at java.base/java.lang.Thread.run(Thread.java:831)
      Caused by: java.lang.NullPointerException: Cannot invoke "cro.a(bxl, cmo, java.util.Random, gg)" because the return value of "java.util.function.Supplier.get()" is null
      	at cuj.a(SourceFile:94)
      	at cuj.a(SourceFile:88)
      	at cuj.a(SourceFile:37)
      	at cro.a(SourceFile:58)
      	at cru.a(SourceFile:29)
      	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
      	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.AbstractPipeline.copyInto(AbstractPipeline.java:484)
      	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
      	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:484)
      	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
      	at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
      	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
      	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
      	at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596)
      	at cru.a(SourceFile:28)
      	at cro.a(SourceFile:58)
      	at cru.a(SourceFile:29)
      	at java.base/java.util.stream.ForEachOps$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$OfInt.forEachRemaining(Spliterator.java:699)
      	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
      	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
      	at java.base/java.util.stream.ForEachOps$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 cru.a(SourceFile:28)
      	at cro.a(SourceFile:58)
      	at bxp.a(SourceFile:388)
      	at cmo.a(SourceFile:245)
      	at cmq.c(SourceFile:100)
      	at cmq.a(SourceFile:231)
      	at abe.a(SourceFile:556)
      	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
      	at abe.a(SourceFile:550)
      	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146)
      	at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478)
      	at abg.b(SourceFile:58)
      	at aqy.g(SourceFile:91)
      	at aqy.a(SourceFile:146)
      	at aqy.run(SourceFile:102)
      	at java.base/java.util.concurrent.ForkJoinTask$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)
      

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            clamlol [Helper] clam lol
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              Created:
              Updated:
              Resolved: