[1.8.9] GameRegistry.registerBlock() throws NoSuchMethodException

I'm trying to set up some blocks with differently textured variants. When I try to register a block with an ItemMultiTexture as its ItemBlock, the game crashes with the stacktrace:

java.lang.NoSuchMethodException: net.minecraft.item.ItemMultiTexture.<init>(net.minecraft.block.Block, mod.block.PortalFrameBlock, mod.block.VariantBlock$1)
at java.lang.Class.getConstructor0(Class.java:3082) ~[?:1.8.0_92]
at java.lang.Class.getConstructor(Class.java:1825) ~[?:1.8.0_92]
at net.minecraftforge.fml.common.registry.GameRegistry.registerBlock(GameRegistry.java:272) [GameRegistry.class:?]
at net.minecraftforge.fml.common.registry.GameRegistry.registerBlock(GameRegistry.java:239) [GameRegistry.class:?]
at mod.block.VariantBlock.<init>(VariantBlock.java:24) [VariantBlock.class:?]
at mod.block.PortalFrameBlock.<init>(PortalFrameBlock.java:30) [PortalFrameBlock.class:?]
at mod.block.ModBlocks.init(ModBlocks.java:18) [ModBlocks.class:?]
at mod.proxy.CommonProxy.preInit(CommonProxy.java:16) [CommonProxy.class:?]
at mod.proxy.ClientProxy.preInit(ClientProxy.java:14) [ClientProxy.class:?]
at mod.TestMod.preInit(TestMod.java:34) [TestMod.class:?]

Context from my code:

protected VariantBlock(String name, Material material) {
super(material);
setUnlocalizedName(name);
setRegistryName(name);
Function<ItemStack, String> function = new Function<ItemStack, String>() {
	@Override
	public String apply(ItemStack input) {
		return getTypeForMeta(input.getMetadata()).getName();
	}
};
GameRegistry.registerBlock(this, ItemMultiTexture.class, this, function);
}

registerBlock() wants me to pass in the constructor arguments for ItemMultiTexture, not the types, but ItemMultiTexture has a (Block, Block, Function<>) constructor, which doesn't match the subtypes produced from the arguments.

Is there any way to work around this, or should I just begin porting everything to 1.9.4?