I have this loot table:

Spoiler

{
  "type": "minecraft:block",
  "pools": [
    {
      "rolls": 1.0,
      "entries": [
        {
          "type": "minecraft:alternatives",
          "children": [
            {
              "type": "minecraft:item",
              "conditions": [
                {
                  "condition": "minecraft:block_state_property",
                  "block": "harderfarming:crop_winter_wheat",
                  "properties": {
                    "age": "7"
                  }
                }
              ],
              "name": "minecraft:wheat"
            },
            {
              "type": "minecraft:item",
              "name": "harderfarming:winter_wheat_seeds"
            }
          ]
        }
      ]
    },
    {
      "rolls": 1.0,
      "entries": [
        {
          "type": "minecraft:item",
          "functions": [
            {
              "function": "minecraft:apply_bonus",
              "enchantment": "minecraft:fortune",
              "formula": "minecraft:binomial_with_bonus_count",
              "parameters": {
                "extra": 3,
                "probability": 0.5714286
              }
            }
          ],
          "name": "harderfarming:winter_wheat_seeds"
        }
      ],
      "conditions": [
        {
          "condition": "minecraft:block_state_property",
          "block": "harderfarming:crop_winter_wheat",
          "properties": {
            "age": "7"
          }
        }
      ]
    }
  ],
  "functions": [
    {
      "function": "minecraft:explosion_decay"
    }
  ]
}

 

It is a direct copy of the Wheat block loot table except that I've replaced the seed and crop references with my own item and block.

 

Nothing drops when the block is destroyed and no errors are left in the log (if I mistype the seed item I do get an "expected item, got string" error).

Edited August 28, 20196 yr by Draco18s

Loot pools in mod loot tables must include an additional name tag.

36 minutes ago, fcelon said:

Loot pools in mod loot tables must include an additional name tag.

As it turns out all I had to do was clean the project and it was fine. Something was getting cached badly and not being refreshed.