The block field of the location_check condition in a block loot table is checked after the block is destroyed.

To Reproduce

1. Create the following loot table in a data pack under data/minecraft/loot_tables/blocks/stone.json, or download the datapack MC-190055 data pack.zip:

   {
     "type": "minecraft:block",
     "pools": [
       {
         "rolls": 1,
         "entries": [
           {
             "type": "minecraft:item",
             "name": "minecraft:stone",
             "conditions": [
               {
                 "condition": "minecraft:location_check",
                 "predicate": {
                   "block": {
                     "block": "minecraft:stone"
                   }
                 }
               }
             ]
           }
         ]
       }
     ]
   }
   

2. Go to survival mode and mine a stone block.
   • No block is dropped.
3. Change the "block": "minecraft:stone" part to "block": "minecraft:air"
   • A stone item is dropped.

The condition is checked after the block is destroyed, making it impossible to check the NBT data of the destroyed block in block loot tables.