Loading fails if item has both normal and expensive recipe

[hohounk]

I'm playing a custom modpack with K2+SE+246k and a whole lot of other smaller mods. During startup I get this error (line numbers are off because I added some debug code):

The issue is in this part of the code:

        ingredients = {
          {"nanotubes", 6},
          table.unpack(util.table.deepcopy(data.raw.recipe["imersium-plate"].ingredients)),
        },

The debug code I added just dumped out data.raw.recipe["imersium-plate"].ingredients and data.raw.recipe["imersium-plate"]

As was obvious from the error message, the first one returned nil. The other one gave the full thing, though:

{
  allow_productivity = true,
  always_show_made_in = true,
  always_show_products = true,
  category = "smelting",
  expensive = {
    always_show_made_in = true,
    always_show_products = true,
    category = "smelting",
    enabled = false,
    energy_required = 32,
    ingredients = {
      {
        amount = 9,
        name = "imersite-powder",
        type = "item"
      },
      {
        amount = 6,
        name = "rare-metals",
        type = "item"
      },
      {
        amount = 4,
        name = "fi_crushed_crystal_item",
        type = "item"
      }
    },
    results = {
      {
        amount = 3,
        name = "imersium-plate",
        type = "item"
      }
    }
  },
  icons = {
    {
      icon = "__Krastorio2Assets__/icons/items/imersium-plate.png",
      icon_size = 64
    }
  },
  mod = "Krastorio2",
  name = "imersium-plate",
  normal = {
    always_show_made_in = true,
    always_show_products = true,
    category = "smelting",
    enabled = false,
    energy_required = 32,
    ingredients = {
      {
        amount = 9,
        name = "imersite-powder",
        type = "item"
      },
      {
        amount = 6,
        name = "rare-metals",
        type = "item"
      },
      {
        amount = 4,
        name = "fi_crushed_crystal_item",
        type = "item"
      }
    },
    results = {
      {
        amount = 3,
        name = "imersium-plate",
        type = "item"
      }
    }
  },
  subgroup = "raw-material",
  type = "recipe"
}

Long story short, if an item has both normal and expensive recipe the code breaks.
I'm not sure how to fix this easily as I've not really done much lua coding outside of similar debugging of factorio mods.

If you wish me to do some more testing or debugging or give a modlist/savegame (without carbon mod as it won't load, naturally) just let me know. I'd love to help you any way I can