If a recipe has air in it as an ingredient or output it can cause many issues
such as crashes and uncraftable recipes.

Recipe: quark:map_pinning Class: public class vazkii.quark.misc.recipe.MapPinningRecipe
Recipe: quark:slabs_to_blocks Class: public class vazkii.arl.recipe.MultiRecipe
Recipe: quark:slabs_to_stairs Class: public class vazkii.arl.recipe.MultiRecipe
Recipe: quark:stairs_to_blocks Class: public class vazkii.arl.recipe.MultiRecipe

This was discovered using caliper by @Darkhax