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  1. Minecraft: Java Edition
  2. MC-213583

Crash upon importing world generation settings with over 256 layers

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    • Icon: Bug Bug
    • Resolution: Fixed
    • 21w11a
    • 21w03a, 21w05a, 21w05b, 21w06a, 21w07a, 21w08b, 21w10a
    • None
    • Confirmed
    • Crash
    • Very Important

      The bug

      Upon importing world generation settings that include over 256 layers, the game crashes. I've attached the settings file that I used when experiencing the issue, as well as the full crash report.

      Note that the world height can be any valid height, and that there must be at least 257 layers included.

      How to reproduce

      1. Select Singleplayer → Create New World → More World Options... → Import Settings
      2. Import the 213583.json file
        Game crashes

      Stack trace

      21w03a: crash-2021-02-01_16.05.04-client.txt
      Description: mouseClicked event handler

java.lang.ArrayIndexOutOfBoundsException: 256
	at ctz.h(SourceFile:236)
	at ctz.<init>(SourceFile:99)
	at com.mojang.datafixers.util.Function6.lambda$null$4(Function6.java:18)
	at com.mojang.serialization.DataResult$Instance.ap3(DataResult.java:337)
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$5.decode(RecordCodecBuilder.java:321)
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107)
	at com.mojang.serialization.MapDecoder.lambda$compressedDecode$0(MapDecoder.java:52)
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136)
	at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52)
	at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91)
	at com.mojang.serialization.Decoder$1.decode(Decoder.java:49)
	at com.mojang.serialization.Codec$2.decode(Codec.java:71)
	at com.mojang.serialization.Codec$1.decode(Codec.java:45)
	at com.mojang.serialization.Decoder.parse(Decoder.java:18)
	at com.mojang.serialization.codecs.FieldDecoder.decode(FieldDecoder.java:29)
	at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34)
	at com.mojang.serialization.MapDecoder$4.decode(MapDecoder.java:94)
	at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34)
	at com.mojang.serialization.codecs.KeyDispatchCodec.lambda$null$1(KeyDispatchCodec.java:67)
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136)
	at com.mojang.serialization.codecs.KeyDispatchCodec.lambda$decode$2(KeyDispatchCodec.java:58)
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136)
	at com.mojang.serialization.codecs.KeyDispatchCodec.decode(KeyDispatchCodec.java:56)
	at com.mojang.serialization.MapDecoder.lambda$compressedDecode$0(MapDecoder.java:52)
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136)
	at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52)
	at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91)
	at com.mojang.serialization.Decoder.parse(Decoder.java:18)
	at com.mojang.serialization.codecs.FieldDecoder.decode(FieldDecoder.java:29)
	at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34)
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$3.decode(RecordCodecBuilder.java:249)
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107)
	at com.mojang.serialization.MapDecoder.lambda$compressedDecode$0(MapDecoder.java:52)
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136)
	at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52)
	at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91)
	at com.mojang.serialization.Decoder.parse(Decoder.java:18)
	at com.mojang.serialization.codecs.BaseMapCodec.lambda$decode$2(BaseMapCodec.java:31)
	at java.util.stream.ReduceOps$1ReducingSink.accept(ReduceOps.java:80)
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.Iterator.forEachRemaining(Iterator.java:116)
	at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.reduce(ReferencePipeline.java:484)
	at com.mojang.serialization.codecs.BaseMapCodec.decode(BaseMapCodec.java:27)
	at com.mojang.serialization.codecs.UnboundedMapCodec.lambda$decode$0(UnboundedMapCodec.java:38)
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136)
	at com.mojang.serialization.codecs.UnboundedMapCodec.decode(UnboundedMapCodec.java:38)
	at com.mojang.serialization.Decoder$2.decode(Decoder.java:63)
	at com.mojang.serialization.Codec$2.decode(Codec.java:71)
	at vv.decode(SourceFile:33)
	at com.mojang.serialization.Decoder$2.decode(Decoder.java:63)
	at com.mojang.serialization.Codec$2.decode(Codec.java:71)
	at com.mojang.serialization.Decoder.parse(Decoder.java:18)
	at com.mojang.serialization.codecs.FieldDecoder.decode(FieldDecoder.java:29)
	at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34)
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$5.decode(RecordCodecBuilder.java:324)
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107)
	at com.mojang.serialization.MapDecoder.lambda$compressedDecode$0(MapDecoder.java:52)
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136)
	at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52)
	at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91)
	at com.mojang.serialization.Decoder$1.decode(Decoder.java:49)
	at com.mojang.serialization.Codec$2.decode(Codec.java:71)
	at com.mojang.serialization.Decoder.parse(Decoder.java:18)
	at dye.a(SourceFile:171)
	at dra.b(SourceFile:33)
	at dqu.a(SourceFile:16)
	at dqy.a(SourceFile:153)
	at dry.a(SourceFile:27)
	at dpr.b(SourceFile:92)
	at duk.a(SourceFile:451)
	at dpr.a(SourceFile:92)
	at dpr.c(SourceFile:162)
	at aow.execute(SourceFile:94)
	at dpr.b(SourceFile:162)
	at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36)
	at org.lwjgl.system.JNI.invokeV(Native Method)
	at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:3129)
	at com.mojang.blaze3d.systems.RenderSystem.limitDisplayFPS(SourceFile:140)
	at dpq.e(SourceFile:1076)
	at dpq.e(SourceFile:688)
	at net.minecraft.client.main.Main.main(SourceFile:215)

        1. 213583.json
          2 kB
        2. crash-2021-02-01_16.05.04-client.txt
          14 kB

            Unassigned Unassigned
            markderickson [Mod] markderickson
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            6 Vote for this issue
            Watchers:
            5 Start watching this issue

              Created:
              Updated:
              Resolved:
              CHK: