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  1. Minecraft: Java Edition
  2. MC-229966

java.lang.NullPointerException when referencing an invalid template pool in start_pool

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    • Icon: Bug Bug
    • Resolution: Fixed
    • 1.18.2
    • 1.17, 1.17.1 Pre-release 1, 1.17.1
    • None
    • Confirmed
    • Crash
    • Very Important

      The bug

      When a configured structure feature references a template pool that doesn't exist the data pack loads fine without any warnings, but when trying to generate terrain in that dimension the server dies

      How to reproduce

      1. Create a new world and add the data pack MC-229966.zip
      2. Teleport to the mojira:229966 dimension 
        /execute in mojira:229966 run teleport ~ ~ ~
      3. Notice that the server died and there are errors in the log, despite the data pack loading without errors

      Crash report

      Worker-Main-10 died
java.util.concurrent.CompletionException: z: 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 abg.b(SourceFile:58)
	at aqx.f(SourceFile:91)
	at aqx.a(SourceFile:131)
	at aqx.run(SourceFile:99)
	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: z: Exception generating new chunk
	at abe.a(SourceFile:567)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at abe.a(SourceFile:549)
	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146)
	... 11 more
Caused by: java.lang.NullPointerException: Cannot invoke "cyb.a(java.util.Random)" because "☃" is null
	at cxv.a(SourceFile:269)
	at csw$a.a(SourceFile:48)
	at csw$a.a(SourceFile:34)
	at cuc.a(SourceFile:269)
	at cro.a(SourceFile:36)
	at cmn.a(SourceFile:309)
	at cmn.a(SourceFile:292)
	at cmp.e(SourceFile:53)
	at cmp.a(SourceFile:231)
	at abe.a(SourceFile:555)
	... 14 more

        1. MC-229966.zip
          1 kB

            Unassigned Unassigned
            Misoloo [Helper] Misode
            Votes:
            4 Vote for this issue
            Watchers:
            6 Start watching this issue

              Created:
              Updated:
              Resolved:
              CHK: