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Bug
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Resolution: Fixed
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20w17a
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None
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Java Edition, Windows 10
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Confirmed
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Crash
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Very Important
The bug
When loading / upgrading worlds which have been created in beta versions or early release versions of Minecraft (released in 2011, maybe also newer versions), the client freezes and has to be terminated through the Windows Task Manager.
crash.txt
occurred for SkyBlock-2.1.zip, the exact version in which the world was created is unknown and some not needed information might have been removed using 3rd party tools, however this also occurs with unmodified worlds, see below.
Opening test b1.6.zip in 20w17a
in 20w17aWorker-10 died java.util.concurrent.CompletionException: s: Exception generating new chunk at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273) at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280) at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:961) at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926) at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442) at yf.b(SourceFile:58) at yf$$Lambda$3365/1287073396.run(Unknown Source) at als.e(SourceFile:83) at als.a(SourceFile:123) at als.run(SourceFile:91) at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402) at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289) at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056) at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1689) at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157) Caused by: s: Exception generating new chunk at yd.a(SourceFile:579) at yd$$Lambda$3367/1964958822.apply(Unknown Source) at com.mojang.datafixers.util.Either$Left.map(Either.java:38) at yd.a(SourceFile:562) at yd$$Lambda$3352/110296568.apply(Unknown Source) at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952) ... 12 more Caused by: java.lang.NullPointerException at amg.a(SourceFile:87) at amg.<init>(SourceFile:23) at yx.d(SourceFile:310) at boz.a(SourceFile:342) at chz.a(SourceFile:58) at cgc.b(SourceFile:102) at cgc$$Lambda$1271/23436669.doWork(Unknown Source) at cgc$d.doWork(SourceFile:258) at cgc.a(SourceFile:214) at yd.a(SourceFile:568) ... 17 more
Opening test 1.0.zip in 20w17a
in 20w17a
Error executing task on Chunk source main thread executor for minecraft:overworld
java.util.concurrent.CompletionException: s: Feature placement
at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:961)
at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
at yf.b(SourceFile:58)
at yf$$Lambda$3355/337692582.run(Unknown Source)
at als.e(SourceFile:83)
at als.a(SourceFile:123)
at als.run(SourceFile:91)
at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402)
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1689)
at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)
Caused by: s: Feature placement
at yd.a(SourceFile:579)
at yd$$Lambda$3357/349989133.apply(Unknown Source)
at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
at yd.a(SourceFile:562)
at yd$$Lambda$3342/455213010.apply(Unknown Source)
at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952)
... 12 more
Caused by: java.lang.NullPointerException
at amg.a(SourceFile:87)
at amg.<init>(SourceFile:23)
at yx.d(SourceFile:310)
at csu$a.a(SourceFile:250)
at ctg.a(SourceFile:76)
at csu$a.a(SourceFile:268)
at cte.a(SourceFile:74)
at clr.a(SourceFile:75)
at clr$$Lambda$3387/874277545.apply(Unknown Source)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at it.unimi.dsi.fastutil.longs.LongIterator$$Lambda$3377/1773788345.accept(Unknown Source)
at java.util.PrimitiveIterator$OfLong.forEachRemaining(PrimitiveIterator.java:189)
at it.unimi.dsi.fastutil.longs.LongIterator.forEachRemaining(LongIterator.java:53)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.LongPipeline.reduce(LongPipeline.java:438)
at java.util.stream.LongPipeline.sum(LongPipeline.java:396)
at java.util.stream.ReferencePipeline.count(ReferencePipeline.java:526)
at clr.a(SourceFile:77)
at cjh.a(SourceFile:54)
at bps.a(SourceFile:423)
at cfy.a(SourceFile:132)
at cgc.c(SourceFile:84)
at cgc$$Lambda$1271/1271109184.doWork(Unknown Source)
at cgc.a(SourceFile:214)
at yd.a(SourceFile:568)
... 17 more
Reproduction steps
- Either create a world in Minecraft b1.6 or 1.0, or download test b1.6.zip or test 1.0.zip
- Open the world in the latest version