mojira.dev
MC-260118

Disabling experimental features on the world creation screen causes pack validation to fail

Resolved
Fixed
1

The bug

On the world creation screen, once experimental features have been enabled, they cannot be disabled again. This might be intentional. In this case, the button for disabling the feature should be greyed out, indicating that this action should not be performed.

To reproduce

  1. Go to the "Create New World" screen.

  2. Go to the Experiments tab.

  3. Turn both buttons on and click "Done".

  4. Go back to the "Create New World" screen.

  5. Go to the Experiments tab again.

  6. Try turning both buttons off and click "Done".

Observed result

You are unable to create the new world, because data pack validation fails. The following is logged:

[17:01:58] [Render thread/WARN]: Failed to validate datapack
java.util.concurrent.CompletionException: java.lang.IllegalStateException: Missing element ResourceKey[minecraft:worldgen/biome / minecraft:cherry_grove]
	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:332) ~[?:?]
	at java.util.concurrent.CompletableFuture.uniAcceptNow(CompletableFuture.java:747) ~[?:?]
	at java.util.concurrent.CompletableFuture.uniAcceptStage(CompletableFuture.java:735) ~[?:?]
	at java.util.concurrent.CompletableFuture.thenAcceptAsync(CompletableFuture.java:2191) ~[?:?]
	at exf.a(SourceFile:644) ~[23w07a.jar:?]
	at exf.a(SourceFile:604) ~[23w07a.jar:?]
	at exf.b(SourceFile:569) ~[23w07a.jar:?]
	at exi.j(SourceFile:100) ~[23w07a.jar:?]
	at exi.b(SourceFile:71) ~[23w07a.jar:?]
	at enx.c(SourceFile:94) ~[23w07a.jar:?]
	at eno.a(SourceFile:16) ~[23w07a.jar:?]
	at enu.a(SourceFile:220) ~[23w07a.jar:?]
	at epd.a(SourceFile:38) ~[23w07a.jar:?]
	at emd.b(SourceFile:96) ~[23w07a.jar:?]
	at esv.a(SourceFile:541) ~[23w07a.jar:?]
	at emd.a(SourceFile:96) ~[23w07a.jar:?]
	at emd.c(SourceFile:167) ~[23w07a.jar:?]
	at bcn.execute(SourceFile:102) ~[23w07a.jar:?]
	at emd.b(SourceFile:167) ~[23w07a.jar:?]
	at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:43) ~[lwjgl-glfw-3.3.1.jar:build 7]
	at org.lwjgl.system.JNI.invokeV(Native Method) ~[lwjgl-3.3.1.jar:build 7]
	at org.lwjgl.glfw.GLFW.glfwPollEvents(GLFW.java:3403) ~[lwjgl-glfw-3.3.1.jar:build 7]
	at com.mojang.blaze3d.systems.RenderSystem.pollEvents(SourceFile:198) ~[23w07a.jar:?]
	at com.mojang.blaze3d.systems.RenderSystem.flipFrame(SourceFile:216) ~[23w07a.jar:?]
	at egf.e(SourceFile:310) ~[23w07a.jar:?]
	at emc.f(SourceFile:1247) ~[23w07a.jar:?]
	at emc.e(SourceFile:800) ~[23w07a.jar:?]
	at net.minecraft.client.main.Main.a(SourceFile:244) ~[23w07a.jar:?]
	at net.minecraft.client.main.Main.main(SourceFile:51) ~[23w07a.jar:?]
Caused by: java.lang.IllegalStateException: Missing element ResourceKey[minecraft:worldgen/biome / minecraft:cherry_grove]
	at hc.c(SourceFile:15) ~[23w07a.jar:?]
	at java.util.Optional.orElseThrow(Optional.java:403) ~[?:?]
	at hc.b(SourceFile:15) ~[23w07a.jar:?]
	at cnr$a.a(SourceFile:147) ~[23w07a.jar:?]
	at com.mojang.datafixers.util.Pair.mapSecond(Pair.java:68) ~[datafixerupper-5.0.28.jar:?]
	at cnr$a.a(SourceFile:142) ~[23w07a.jar:?]
	at cns.a(SourceFile:599) ~[23w07a.jar:?]
	at cns.c(SourceFile:393) ~[23w07a.jar:?]
	at cns.d(SourceFile:272) ~[23w07a.jar:?]
	at cns.a(SourceFile:197) ~[23w07a.jar:?]
	at cnr$a.a(SourceFile:142) ~[23w07a.jar:?]
	at cnr$a$3.apply(SourceFile:122) ~[23w07a.jar:?]
	at cnr$a.a(SourceFile:147) ~[23w07a.jar:?]
	at cnr$b.a(SourceFile:92) ~[23w07a.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at cnr.a(SourceFile:42) ~[23w07a.jar:?]
	at com.mojang.datafixers.util.Either$Left.mapBoth(Either.java:33) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.map(DataResult.java:110) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder$4.decode(MapDecoder.java:94) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.KeyDispatchCodec.lambda$decode$1(KeyDispatchCodec.java:67) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.KeyDispatchCodec.lambda$decode$2(KeyDispatchCodec.java:58) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.KeyDispatchCodec.decode(KeyDispatchCodec.java:56) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.lambda$compressedDecode$0(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.FieldDecoder.decode(FieldDecoder.java:29) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$3.decode(RecordCodecBuilder.java:248) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.KeyDispatchCodec.lambda$decode$1(KeyDispatchCodec.java:67) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.KeyDispatchCodec.lambda$decode$2(KeyDispatchCodec.java:58) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.KeyDispatchCodec.decode(KeyDispatchCodec.java:56) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.lambda$compressedDecode$0(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.FieldDecoder.decode(FieldDecoder.java:29) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$3.decode(RecordCodecBuilder.java:249) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.lambda$compressedDecode$0(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.BaseMapCodec.lambda$decode$2(BaseMapCodec.java:31) ~[datafixerupper-5.0.28.jar:?]
	at java.util.stream.ReduceOps$1ReducingSink.accept(ReduceOps.java:80) ~[?:?]
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?]
	at java.util.Iterator.forEachRemaining(Iterator.java:133) ~[?:?]
	at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1845) ~[?:?]
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?]
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?]
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[?:?]
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
	at java.util.stream.ReferencePipeline.reduce(ReferencePipeline.java:667) ~[?:?]
	at com.mojang.serialization.codecs.BaseMapCodec.decode(BaseMapCodec.java:27) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.UnboundedMapCodec.lambda$decode$0(UnboundedMapCodec.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.UnboundedMapCodec.decode(UnboundedMapCodec.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.Decoder$2.decode(Decoder.java:63) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.Codec$2.decode(Codec.java:71) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.FieldDecoder.decode(FieldDecoder.java:29) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$1.decode(RecordCodecBuilder.java:183) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$3.decode(RecordCodecBuilder.java:249) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.lambda$compressedDecode$0(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[datafixerupper-5.0.28.jar:?]
	at exf.a(SourceFile:630) ~[23w07a.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at exf.a(SourceFile:630) ~[23w07a.jar:?]
	at adt.a(SourceFile:42) ~[23w07a.jar:?]
	at exf.a(SourceFile:614) ~[23w07a.jar:?]
	... 24 more
[17:01:58] [Render thread/WARN]: Failed to validate datapack
java.util.concurrent.CompletionException: java.lang.IllegalStateException: Missing element ResourceKey[minecraft:worldgen/biome / minecraft:cherry_grove]
	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:332) ~[?:?]
	at java.util.concurrent.CompletableFuture.uniAcceptNow(CompletableFuture.java:747) ~[?:?]
	at java.util.concurrent.CompletableFuture.uniAcceptStage(CompletableFuture.java:735) ~[?:?]
	at java.util.concurrent.CompletableFuture.thenAcceptAsync(CompletableFuture.java:2191) ~[?:?]
	at exf.a(SourceFile:644) ~[23w07a.jar:?]
	at exf.a(SourceFile:604) ~[23w07a.jar:?]
	at exf.b(SourceFile:569) ~[23w07a.jar:?]
	at exi.j(SourceFile:100) ~[23w07a.jar:?]
	at exi.b(SourceFile:71) ~[23w07a.jar:?]
	at enx.c(SourceFile:94) ~[23w07a.jar:?]
	at eno.a(SourceFile:16) ~[23w07a.jar:?]
	at enu.a(SourceFile:220) ~[23w07a.jar:?]
	at epd.a(SourceFile:38) ~[23w07a.jar:?]
	at emd.b(SourceFile:96) ~[23w07a.jar:?]
	at esv.a(SourceFile:541) ~[23w07a.jar:?]
	at emd.a(SourceFile:96) ~[23w07a.jar:?]
	at emd.c(SourceFile:167) ~[23w07a.jar:?]
	at bcn.execute(SourceFile:102) ~[23w07a.jar:?]
	at emd.b(SourceFile:167) ~[23w07a.jar:?]
	at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:43) ~[lwjgl-glfw-3.3.1.jar:build 7]
	at org.lwjgl.system.JNI.invokeV(Native Method) ~[lwjgl-3.3.1.jar:build 7]
	at org.lwjgl.glfw.GLFW.glfwPollEvents(GLFW.java:3403) ~[lwjgl-glfw-3.3.1.jar:build 7]
	at com.mojang.blaze3d.systems.RenderSystem.pollEvents(SourceFile:198) ~[23w07a.jar:?]
	at com.mojang.blaze3d.systems.RenderSystem.flipFrame(SourceFile:216) ~[23w07a.jar:?]
	at egf.e(SourceFile:310) ~[23w07a.jar:?]
	at emc.f(SourceFile:1247) ~[23w07a.jar:?]
	at emc.e(SourceFile:800) ~[23w07a.jar:?]
	at net.minecraft.client.main.Main.a(SourceFile:244) ~[23w07a.jar:?]
	at net.minecraft.client.main.Main.main(SourceFile:51) ~[23w07a.jar:?]
Caused by: java.lang.IllegalStateException: Missing element ResourceKey[minecraft:worldgen/biome / minecraft:cherry_grove]
	at hc.c(SourceFile:15) ~[23w07a.jar:?]
	at java.util.Optional.orElseThrow(Optional.java:403) ~[?:?]
	at hc.b(SourceFile:15) ~[23w07a.jar:?]
	at cnr$a.a(SourceFile:147) ~[23w07a.jar:?]
	at com.mojang.datafixers.util.Pair.mapSecond(Pair.java:68) ~[datafixerupper-5.0.28.jar:?]
	at cnr$a.a(SourceFile:142) ~[23w07a.jar:?]
	at cns.a(SourceFile:599) ~[23w07a.jar:?]
	at cns.c(SourceFile:393) ~[23w07a.jar:?]
	at cns.d(SourceFile:272) ~[23w07a.jar:?]
	at cns.a(SourceFile:197) ~[23w07a.jar:?]
	at cnr$a.a(SourceFile:142) ~[23w07a.jar:?]
	at cnr$a$3.apply(SourceFile:122) ~[23w07a.jar:?]
	at cnr$a.a(SourceFile:147) ~[23w07a.jar:?]
	at cnr$b.a(SourceFile:92) ~[23w07a.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at cnr.a(SourceFile:42) ~[23w07a.jar:?]
	at com.mojang.datafixers.util.Either$Left.mapBoth(Either.java:33) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.map(DataResult.java:110) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder$4.decode(MapDecoder.java:94) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.KeyDispatchCodec.lambda$decode$1(KeyDispatchCodec.java:67) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.KeyDispatchCodec.lambda$decode$2(KeyDispatchCodec.java:58) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.KeyDispatchCodec.decode(KeyDispatchCodec.java:56) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.lambda$compressedDecode$0(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.FieldDecoder.decode(FieldDecoder.java:29) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$3.decode(RecordCodecBuilder.java:248) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.KeyDispatchCodec.lambda$decode$1(KeyDispatchCodec.java:67) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.KeyDispatchCodec.lambda$decode$2(KeyDispatchCodec.java:58) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.KeyDispatchCodec.decode(KeyDispatchCodec.java:56) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.lambda$compressedDecode$0(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.FieldDecoder.decode(FieldDecoder.java:29) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$3.decode(RecordCodecBuilder.java:249) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.lambda$compressedDecode$0(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.BaseMapCodec.lambda$decode$2(BaseMapCodec.java:31) ~[datafixerupper-5.0.28.jar:?]
	at java.util.stream.ReduceOps$1ReducingSink.accept(ReduceOps.java:80) ~[?:?]
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?]
	at java.util.Iterator.forEachRemaining(Iterator.java:133) ~[?:?]
	at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1845) ~[?:?]
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?]
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?]
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[?:?]
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
	at java.util.stream.ReferencePipeline.reduce(ReferencePipeline.java:667) ~[?:?]
	at com.mojang.serialization.codecs.BaseMapCodec.decode(BaseMapCodec.java:27) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.UnboundedMapCodec.lambda$decode$0(UnboundedMapCodec.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.UnboundedMapCodec.decode(UnboundedMapCodec.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.Decoder$2.decode(Decoder.java:63) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.Codec$2.decode(Codec.java:71) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.FieldDecoder.decode(FieldDecoder.java:29) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$1.decode(RecordCodecBuilder.java:183) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$3.decode(RecordCodecBuilder.java:249) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.lambda$compressedDecode$0(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[datafixerupper-5.0.28.jar:?]
	at exf.a(SourceFile:630) ~[23w07a.jar:?]
	at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
	at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-5.0.28.jar:?]
	at exf.a(SourceFile:630) ~[23w07a.jar:?]
	at adt.a(SourceFile:42) ~[23w07a.jar:?]
	at exf.a(SourceFile:614) ~[23w07a.jar:?]
	... 24 more

This cannot be fixed by clicking the "Reset to Default" button on the "Data pack validation failed!" pop-up.

Expected result

You would be able to perform this action, or you could no longer access the Experiments tab once it had been turned on.

Attachments

2023-02-15_21.10.05.png

Comments 3

This screen mentions that they can't be turned off after world creation, so almost definitely intentional.

[media]

Does this action actually create a world? This happens when you don't click the "Create New World" button, which is why I think this could be unintentional.

Apologies, I misunderstood your bug report - I thought you were talking about disabling these features after world creation, not while still on the create world screen. I could confirm this.

Edit: Reworded the bug report slightly such that this is hopefully a bit clearer

ampolive

boq

Confirmed

Platform

Important

Data Packs, UI

23w07a

1.19.4 Pre-release 1

Retrieved