MC 1.12.2

Trying to pull Mekanism's Gas from JEI crush client with error:

Description: Updating screen events

java.lang.RuntimeException: Unrecognized ingredient type: class mekanism.api.gas.GasStack
	at me.towdium.jecalculation.data.label.ILabel$Converter.from(ILabel.java:245)
	at me.towdium.jecalculation.jei.JecaPlugin.getLabelUnderMouse(JecaPlugin.java:36)
	at me.towdium.jecalculation.gui.JecaGui.onMouse(JecaGui.java:108)
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_1048_JecaGui_onMouse_Pre.invoke(.dynamic)
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
	at com.github.terminatornl.laggoggles.tickcentral.EventBusTransformer.redirectEvent(EventBusTransformer.java:67)
	at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
	at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:500)
	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1759)
	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1098)
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:398)
	at net.minecraft.client.main.Main.main(SourceFile:123)

Steps lead me to crush:

1. I open new recipe UI pressing [+] in one of Mekanism's recipes including gas as input
2. Gas was missing, so i try to pull it from JEI left panal (that created by pressing "A" on items)
3. Clicking on gas caused crush

Same behaviour also happens with Thaumcraft's Aspects. Had crush again.

java.lang.RuntimeException: Unrecognized ingredient type: class thaumcraft.api.aspects.AspectList
	at me.towdium.jecalculation.data.label.ILabel$Converter.from(ILabel.java:245)
	at me.towdium.jecalculation.jei.JecaPlugin.getLabelUnderMouse(JecaPlugin.java:36)
	at me.towdium.jecalculation.gui.JecaGui.onMouse(JecaGui.java:108)

Thank you for answer!
If new behavior would not be implemented soon, please at least disable [+] action for non-standart types. I usually accidentally clicking on [+] button and got crush, when just not noticed weird item in ingredient list.

Thanks for report! But let me explain a little.

For [+] transfer, I'm currently only extracting ItemStack and FluidStack from Jei recipes. Jei actually supports other types of ingredients. If these mods are handling correctly, I should be able to extract these things.

But another problem, as you have seen, I have to convert ingredients into JECa built-in types for them to support calculation and serialization. I have several built-in types: ItemStack, FluidStack, Placeholders and other OreDict ones. For less-used ingredient types, to save me some time, I will convert them into Placeholders with special names, rather than creating new built-in types, although I agree that using specialized built-in types will improve the appearance.

The above behavior is implemented half-way for 1.14+. 1.12 might also have an update in the future. But for now, you can simply use placeholders to get around it.

For 1.15+, I'm doing a quite shabby, but working solution for such things. The amount also get transferred correctly.

For 1.12, I will soon make a simpler change to get rid of crashes, since I don't want to mach too much change to it.