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Java and you: How to avoid crashes

Cannot invoke "net.minecraft.entity.ai.attributes.AttributeModifierMap.getValue(net.minecraft.entity.ai.attributes.Attribute)"

MCArTyR

By MCArTyR
in Modder Support

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MCArTyR Tree Puncher

MCArTyR

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Posted

I read what needs to be done like this: 

private void setup(final FMLCommonSetupEvent event){
	DefferedWorkQueue.runLater(() -> {
    	GlobalEntityTypeAttributes.put(...);
    });
}

But due to deprecation warnings, I did this:
  

    @SubscribeEvent
    public static void onEntityAttributeCreation(EntityAttributeCreationEvent event){
        event.put(RegistryHandler.FROG_ENTITY.get(), FrogEntity.setCustomAttributes().build());
    }

My error: 

java.lang.NullPointerException: Cannot invoke "net.minecraft.entity.ai.attributes.AttributeModifierMap.getValue(net.minecraft.entity.ai.attributes.Attribute)" because "this.supplier" is null
	at net.minecraft.entity.ai.attributes.AttributeModifierManager.getValue(AttributeModifierManager.java:67) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading}
	at net.minecraft.entity.LivingEntity.getAttributeValue(LivingEntity.java:1729) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading}
	at net.minecraft.entity.LivingEntity.getMaxHealth(LivingEntity.java:1509) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading}
	at net.minecraft.entity.LivingEntity.<init>(LivingEntity.java:207) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading}
	at net.minecraft.entity.MobEntity.<init>(MobEntity.java:108) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.entity.CreatureEntity.<init>(CreatureEntity.java:13) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading}
	at net.minecraft.entity.AgeableEntity.<init>(AgeableEntity.java:21) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading}
	at net.minecraft.entity.passive.AnimalEntity.<init>(AnimalEntity.java:37) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading}
	at me.mcartyr.tutorial.entities.FrogEntity.<init>(FrogEntity.java:31) ~[main/:?] {re:classloading}

How to fix it?

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MCArTyR Tree Puncher

MCArTyR

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Posted (edited)
18 minutes ago, kiou.23 said:

the error points to your FrogEntity constructor: 



at me.mcartyr.tutorial.entities.FrogEntity.<init>(FrogEntity.java:31) ~[main/:?] {re:classloading}

can you post it (and mark what line is line 31)?

Thats constructor with super() only. 
Here is the whole code, I removed only irrelevant methods
  

public class FrogEntity extends AnimalEntity { 
  public FrogEntity(EntityType<? extends AnimalEntity> type, World worldIn) {
        super(type, worldIn);
    } // << - 31 line

    public static AttributeModifierMap.MutableAttribute setCustomAttributes() {
        return MobEntity.createMobAttributes()
                .add(Attributes.MAX_HEALTH, 10.0)
                .add(Attributes.MOVEMENT_SPEED, 0.25);
    }

    @Nullable
    @Override
    public AgeableEntity getBreedOffspring(ServerWorld world, AgeableEntity p_241840_2_) {
        return RegistryHandler.FROG_ENTITY.get().create(world);
    }
}

 

Edited by MCArTyR
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MCArTyR Tree Puncher

MCArTyR

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I found that in logs 

[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes
[00:27:34] [modloading-worker-2/ERROR] [minecraft/GlobalEntityTypeAttributes]: Entity tutorial:frog has no attributes

 

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MCArTyR Tree Puncher

MCArTyR

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Posted (edited)

Now I have a problem like this: 

java.lang.NullPointerException: Cannot invoke "net.minecraft.client.renderer.entity.EntityRenderer.shouldRender(net.minecraft.entity.Entity, net.minecraft.client.renderer.culling.ClippingHelper, double, double, double)" because "entityrenderer" is null
	at net.minecraft.client.renderer.entity.EntityRendererManager.shouldRender(EntityRendererManager.java:238) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.renderer.WorldRenderer.renderLevel(WorldRenderer.java:987) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.renderer.GameRenderer.renderLevel(GameRenderer.java:608) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.renderer.GameRenderer.render(GameRenderer.java:425) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.runTick(Minecraft.java:976) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.run(Minecraft.java:607) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.main.Main.main(Main.java:184) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) ~[?:?] {}
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
	at java.lang.reflect.Method.invoke(Method.java:564) ~[?:?] {}
	at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:52) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {}
	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:?] {}
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?] {}
	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:105) [forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {}

FrogRenderer: 

public class FrogRenderer extends MobRenderer<FrogEntity, FrogModel<FrogEntity>> {

    protected static final ResourceLocation TEXTURE = new ResourceLocation(Main.MOD_ID, "textures/entity/frog");

    public FrogRenderer(EntityRendererManager renderManagerIn) {
        super(renderManagerIn, new FrogModel<>(), 0.7F);
    }

    @Override
    public ResourceLocation getTextureLocation(FrogEntity p_110775_1_) {
        return TEXTURE;
    }
}

 

Edited by MCArTyR
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