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Error when running Eclipse base project with MC Version set to 1.12.2


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---- Minecraft Crash Report ----
// There are four lights!

Time: 6/24/21 12:33 PM
Description: There was a severe problem during mod loading that has caused the game to fail

net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from Forge Mod Loader (FML)
Caused by: java.lang.NullPointerException
	at net.minecraftforge.fml.common.network.NetworkRegistry.newChannel(NetworkRegistry.java:207)
	at net.minecraftforge.fml.common.network.internal.FMLNetworkHandler.registerChannel(FMLNetworkHandler.java:185)
	at net.minecraftforge.fml.common.FMLContainer.modConstruction(FMLContainer.java:92)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
	at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
	at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
	at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
	at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
	at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
	at com.google.common.eventbus.EventBus.post(EventBus.java:217)
	at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:219)
	at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:197)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
	at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
	at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
	at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
	at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
	at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
	at com.google.common.eventbus.EventBus.post(EventBus.java:217)
	at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:136)
	at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:595)
	at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:232)
	at net.minecraft.client.Minecraft.init(Minecraft.java:467)
	at net.minecraft.client.Minecraft.run(Minecraft.java:378)
	at net.minecraft.client.main.Main.main(SourceFile:123)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at net.minecraftforge.legacydev.Main.start(Main.java:86)
	at net.minecraftforge.legacydev.MainClient.main(MainClient.java:29)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
	Minecraft Version: 1.12.2
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_292, Red Hat, Inc.
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Red Hat, Inc.
	Memory: 266734296 bytes (254 MB) / 858259456 bytes (818 MB) up to 3749183488 bytes (3575 MB)
	JVM Flags: 0 total; 
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	FML: MCP 9.42 Powered by Forge 14.23.5.2855 5 mods loaded, 5 mods active
	States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

	| State | ID         | Version      | Source                                                      | Signature |
	|:----- |:---------- |:------------ |:----------------------------------------------------------- |:--------- |
	| LC    | minecraft  | 1.12.2       | minecraft.jar                                               | None      |
	| LC    | mcp        | 9.42         | minecraft.jar                                               | None      |
	| LE    | FML        | 8.0.99.99    | forge-1.12.2-14.23.5.2855_mapped_snapshot_20171003-1.12.jar | None      |
	| L     | forge      | 14.23.5.2855 | forge-1.12.2-14.23.5.2855_mapped_snapshot_20171003-1.12.jar | None      |
	| L     | examplemod | 1.0          | main                                                        | None      |

	Loaded coremods (and transformers): 
	GL info: ' Vendor: 'Intel' Version: '4.4.0 - Build 20.19.15.5144' Renderer: 'Intel(R) HD Graphics 5500'

This is the crash-log I get when  I try to run the base Forge 1.12.2 Latest MDK with the mod only being "examplemod". I have no Idea what is causing this error any help would be appreciate!

Also I set the MCVERSION of the project to 1.12.2 Here is a picture:

grafik.png.f516969f52966610440c1c225c4f600b.png

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    • does anybody know how to fix this? (Im not too tech savy and dont know alot) basically i made anew modpack today. Tried to create a new world and it crashes every time with this as the crash exit code : ---- Minecraft Crash Report ---- // I let you down. Sorry Time: 24/09/21 18:12 Description: Starting integrated server java.lang.NullPointerException: Starting integrated server     at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:770) ~[guava-21.0.jar:?] {}     at com.google.common.collect.ImmutableCollection$ArrayBasedBuilder.add(ImmutableCollection.java:477) ~[guava-21.0.jar:?] {}     at com.google.common.collect.ImmutableList$Builder.add(ImmutableList.java:758) ~[guava-21.0.jar:?] {}     at com.google.common.collect.CollectCollectors$$Lambda$2173/998099820.accept(Unknown Source) ~[?:?] {}     at java.util.stream.ReduceOps$3ReducingSink.accept(ReduceOps.java:169) ~[?:1.8.0_51] {}     at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[?:1.8.0_51] {}     at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[?:1.8.0_51] {}     at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1374) ~[?:1.8.0_51] {}     at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512) ~[?:1.8.0_51] {}     at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502) ~[?:1.8.0_51] {}     at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[?:1.8.0_51] {}     at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:1.8.0_51] {}     at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[?:1.8.0_51] {}     at net.minecraft.world.biome.provider.BiomeProvider.<init>(SourceFile:38) ~[?:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}     at org.infernalstudios.infernalexp.world.dimension.ModNetherBiomeProvider.<init>(ModNetherBiomeProvider.java:63) ~[?:2.2.0] {re:mixin,re:classloading}     at org.infernalstudios.infernalexp.util.NoiseChunkGeneratorUtil.lambda$null$0(NoiseChunkGeneratorUtil.java:39) ~[?:2.2.0] {re:mixin,re:classloading}     at org.infernalstudios.infernalexp.util.NoiseChunkGeneratorUtil$$Lambda$2595/1435857604.apply(Unknown Source) ~[?:?] {}     at com.mojang.serialization.codecs.RecordCodecBuilder$Instance.lambda$ap3$6(RecordCodecBuilder.java:286) ~[datafixerupper-4.0.26.jar:?] {re:classloading}     at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$$Lambda$932/1229281613.apply(Unknown Source) ~[?:?] {}     at com.mojang.serialization.codecs.RecordCodecBuilder$2.encode(RecordCodecBuilder.java:112) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.codecs.KeyDispatchCodec.encode(KeyDispatchCodec.java:92) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.MapCodec$MapCodecCodec.encode(MapCodec.java:96) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14) ~[datafixerupper-4.0.26.jar:?] {re:classloading}     at com.mojang.serialization.codecs.FieldEncoder.encode(FieldEncoder.java:24) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.MapCodec$1.encode(MapCodec.java:39) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$4.encode(RecordCodecBuilder.java:223) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.codecs.RecordCodecBuilder$2.encode(RecordCodecBuilder.java:112) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.MapCodec$MapCodecCodec.encode(MapCodec.java:96) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14) ~[datafixerupper-4.0.26.jar:?] {re:classloading}     at com.mojang.serialization.codecs.BaseMapCodec.encode(BaseMapCodec.java:52) ~[datafixerupper-4.0.26.jar:?] {re:classloading}     at net.minecraftforge.common.LenientUnboundedMapCodec.encode(LenientUnboundedMapCodec.java:75) ~[?:?] {re:classloading}     at net.minecraftforge.common.LenientUnboundedMapCodec.encode(LenientUnboundedMapCodec.java:22) ~[?:?] {re:classloading}     at com.mojang.serialization.Encoder$1.encode(Encoder.java:25) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.Codec$2.encode(Codec.java:76) ~[datafixerupper-4.0.26.jar:?] {}     at net.minecraft.util.registry.SimpleRegistryCodec.encode(SourceFile:28) ~[?:?] {re:classloading}     at net.minecraft.util.registry.SimpleRegistryCodec.encode(SourceFile:11) ~[?:?] {re:classloading}     at com.mojang.serialization.Encoder$1.encode(Encoder.java:25) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.Codec$2.encode(Codec.java:76) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14) ~[datafixerupper-4.0.26.jar:?] {re:classloading}     at com.mojang.serialization.codecs.FieldEncoder.encode(FieldEncoder.java:24) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.MapCodec$1.encode(MapCodec.java:39) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$6.encode(RecordCodecBuilder.java:296) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.codecs.RecordCodecBuilder$2.encode(RecordCodecBuilder.java:112) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.MapCodec$MapCodecCodec.encode(MapCodec.java:96) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.Encoder$1.encode(Encoder.java:25) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.Codec$2.encode(Codec.java:76) ~[datafixerupper-4.0.26.jar:?] {}     at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14) ~[datafixerupper-4.0.26.jar:?] {re:classloading}     at net.minecraft.world.storage.ServerWorldInfo.func_237370_a_(SourceFile:250) ~[?:?] {re:classloading,pl:accesstransformer:B}     at net.minecraft.world.storage.ServerWorldInfo.func_230411_a_(SourceFile:231) ~[?:?] {re:classloading,pl:accesstransformer:B}     at net.minecraft.world.storage.SaveFormat$LevelSave.func_237288_a_(SaveFormat.java:341) ~[?:?] {re:computing_frames,re:mixin,re:classloading}     at net.minecraft.world.storage.SaveFormat$LevelSave.func_237287_a_(SaveFormat.java:336) ~[?:?] {re:computing_frames,re:mixin,re:classloading}     at net.minecraft.client.Minecraft.loadWorld(Minecraft.java:1740) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:abnormals_core.mixins.json:client.MinecraftMixin,pl:mixin:APP:outer_end.mixins.json:BackgroundMusicMixin,pl:mixin:APP:randompatches.mixins.json:client.MinecraftMixin,pl:mixin:APP:betterendforge.mixins.json:MinecraftMixin,pl:mixin:A,pl:runtimedistcleaner:A}     at net.minecraft.client.Minecraft.func_238192_a_(Minecraft.java:1685) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:abnormals_core.mixins.json:client.MinecraftMixin,pl:mixin:APP:outer_end.mixins.json:BackgroundMusicMixin,pl:mixin:APP:randompatches.mixins.json:client.MinecraftMixin,pl:mixin:APP:betterendforge.mixins.json:MinecraftMixin,pl:mixin:A,pl:runtimedistcleaner:A}     at net.minecraft.client.gui.screen.CreateWorldScreen.func_195352_j(CreateWorldScreen.java:260) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}     at net.minecraft.client.gui.screen.CreateWorldScreen.lambda$init$11(CreateWorldScreen.java:205) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}     at net.minecraft.client.gui.screen.CreateWorldScreen$$Lambda$13249/653350518.onPress(Unknown Source) ~[?:?] {}     at net.minecraft.client.gui.widget.button.Button.func_230930_b_(SourceFile:33) ~[?:?] {re:classloading,pl:accesstransformer:B,re:mixin,pl:accesstransformer:B}     at net.minecraft.client.gui.widget.button.AbstractButton.func_230982_a_(SourceFile:16) ~[?:?] {re:classloading,re:mixin}     at net.minecraft.client.gui.widget.Widget.func_231044_a_(Widget.java:136) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A}     at net.minecraft.client.gui.INestedGuiEventHandler.func_231044_a_(SourceFile:27) ~[?:?] {re:computing_frames,re:mixin,re:classloading}     at net.minecraft.client.MouseHelper.func_198033_b(MouseHelper.java:87) ~[?:?] {re:mixin,pl:runtimedistcleaner:A,re:classloading,pl:mixin:APP:randompatches.mixins.json:client.keybindings.MouseHelperMixin,pl:mixin:A,pl:runtimedistcleaner:A}     at net.minecraft.client.MouseHelper$$Lambda$12852/788532761.run(Unknown Source) ~[?:?] {}     at net.minecraft.client.gui.screen.Screen.func_231153_a_(Screen.java:427) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:computing_frames,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:quark.mixins.json:client.ScreenMixin,pl:mixin:A,pl:runtimedistcleaner:A}     at net.minecraft.client.MouseHelper.func_198023_a(MouseHelper.java:85) ~[?:?] {re:mixin,pl:runtimedistcleaner:A,re:classloading,pl:mixin:APP:randompatches.mixins.json:client.keybindings.MouseHelperMixin,pl:mixin:A,pl:runtimedistcleaner:A}     at net.minecraft.client.MouseHelper.func_228030_c_(MouseHelper.java:181) ~[?:?] {re:mixin,pl:runtimedistcleaner:A,re:classloading,pl:mixin:APP:randompatches.mixins.json:client.keybindings.MouseHelperMixin,pl:mixin:A,pl:runtimedistcleaner:A}     at net.minecraft.client.MouseHelper$$Lambda$12851/2033249737.run(Unknown Source) ~[?:?] {}     at net.minecraft.util.concurrent.ThreadTaskExecutor.execute(ThreadTaskExecutor.java:111) ~[?:?] {re:mixin,pl:accesstransformer:B,xf:OptiFine:default,re:computing_frames,pl:accesstransformer:B,xf:OptiFine:default,re:classloading,pl:accesstransformer:B,xf:OptiFine:default}     at net.minecraft.client.MouseHelper.func_228028_b_(MouseHelper.java:180) ~[?:?] {re:mixin,pl:runtimedistcleaner:A,re:classloading,pl:mixin:APP:randompatches.mixins.json:client.keybindings.MouseHelperMixin,pl:mixin:A,pl:runtimedistcleaner:A}     at net.minecraft.client.MouseHelper$$Lambda$10760/310858279.invoke(Unknown Source) ~[?:?] {}     at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36) ~[lwjgl-glfw-3.2.2.jar:build 10] {}     at org.lwjgl.system.JNI.invokeV(Native Method) ~[lwjgl-3.2.2.jar:build 10] {}     at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:3174) ~[lwjgl-glfw-3.2.2.jar:build 10] {}     at com.mojang.blaze3d.systems.RenderSystem.limitDisplayFPS(SourceFile:127) ~[?:?] {re:mixin,re:classloading}     at net.minecraft.client.Minecraft.func_195542_b(Minecraft.java:999) [?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:abnormals_core.mixins.json:client.MinecraftMixin,pl:mixin:APP:outer_end.mixins.json:BackgroundMusicMixin,pl:mixin:APP:randompatches.mixins.json:client.MinecraftMixin,pl:mixin:APP:betterendforge.mixins.json:MinecraftMixin,pl:mixin:A,pl:runtimedistcleaner:A}     at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:607) [?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:abnormals_core.mixins.json:client.MinecraftMixin,pl:mixin:APP:outer_end.mixins.json:BackgroundMusicMixin,pl:mixin:APP:randompatches.mixins.json:client.MinecraftMixin,pl:mixin:APP:betterendforge.mixins.json:MinecraftMixin,pl:mixin:A,pl:runtimedistcleaner:A}     at net.minecraft.client.main.Main.main(Main.java:184) [?:?] {re:classloading,pl:runtimedistcleaner:A}     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51] {}     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51] {}     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51] {}     at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51] {}     at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51) [forge-1.16.5-36.2.5.jar:36.2] {}     at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$489/929856893.call(Unknown Source) [forge-1.16.5-36.2.5.jar:36.2] {}     at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?] {re:classloading}     at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?] {re:classloading}    
    • I think I've got it. Or at least a base to start working from. if (toolRef.getHarvestLevel(heldItems, ToolType.AXE, playerRef, blockState) <= 0) { event.setCanceled(true); } I've implemented it into my existing onBlockBreak event, because I was having issues to get it working for the HarvestCheck event. For a weird reason it wouldn't accept the BlockState reference inside the getHarvestLevel() method, when I was using it on HarvestCheck event. I'd still prefer any kind of reflection method though. Was way less complicated.
    • It's not only the tools. Let me explain. I remove some of the vanilla tools, primarily those made of wood, and then only need to check for tools in general. Ontop of that I've build some custom tools, which allows me to define what exactly they are allowed to harvest, and what not, in the specific custom tool class. Then I check against AIR(for having no item in my hands at all), entirely disallowing to harvest anything but for example, DIRT, CROPS, and stuff you'd need no tools to harvest in reality. Which leaves harvest with blocks in my hand open to be addressed. In the past I was just using the "setRequiresTool" reflection method, so I couldn't bypass my prohibition of harvesting anything with only AIR, or random blocks in my hand.
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