Crash when leaving out processors in a template pool: java.lang.IllegalArgumentException: bound must be positive

{
  "name": "foo",
  "fallback": "minecraft:empty",
  "elements": [
    {
      "weight": 1,
      "element": {
        "element_type": "minecraft:single_pool_element",
        "projection": "terrain_matching",
        "location": "bar"
      }
    }
  ]
}