I have been making a double plant block that needs the light level property but I get the error

Caused by: java.lang.IllegalArgumentException: Cannot set property EnumProperty{name=half, clazz=class net.minecraft.world.level.block.state.properties.DoubleBlockHalf, values=[upper, lower]} as it does not exist in Block{minecraft:air}

and I don't how to fix it.

code for the block registry:

 public static final RegistryObject<Block> TALL_INVERTED_END_FERN = registerBlock("tall_inverted_end_fern",
            () -> new ModTallInvertedEndFern(BlockBehaviour.Properties.of(Material.REPLACEABLE_PLANT).instabreak()
                    .noCollission().sound(SoundType.GRASS).lightLevel(state -> state.getValue(ModTallInvertedEndFern.LIT) ? 15 : 0)), ModCreativeModeTab.ECHOING_VOID_TAB);

code for the block class:

package net.XO.echoing_void.blocks.custom;

import net.XO.echoing_void.blocks.ModBlocks;
import net.minecraft.core.BlockPos;
import net.minecraft.world.level.BlockGetter;
import net.minecraft.world.level.block.Block;
import net.minecraft.world.level.block.DoublePlantBlock;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.block.state.StateDefinition;
import net.minecraft.world.level.block.state.properties.BooleanProperty;

public class ModTallInvertedEndFern extends DoublePlantBlock {
    public ModTallInvertedEndFern(Properties pProperties) {
        super(pProperties);
    }
    @Override
    protected boolean mayPlaceOn(BlockState p_55920_, BlockGetter p_55921_, BlockPos p_55922_) {
        return p_55920_.is(ModBlocks.INVERTED_END_STONE_GRASS_BLOCK.get()) ||
                p_55920_.is(ModBlocks.INVERTED_GREEN_END_STONE_GRASS_BLOCK.get()) ||
                p_55920_.is(ModBlocks.INVERTED_END_DIRT_GRASS_BLOCK.get()) || super.mayPlaceOn(p_55920_, p_55921_, p_55922_);
    }
    public static final BooleanProperty LIT = BooleanProperty.create("lit");

    @Override
    protected void createBlockStateDefinition(StateDefinition.Builder<Block, BlockState> builder) {
        builder.add(LIT);
    }
}

 

Edited July 14, 20232 yr by XsistOrder
new issue with the block

when you override a method, you usually want to call the inherited code with your own being an addition.

separate issue, why "lit"? that's a furnace on/off property. don't you want an integer property?