rules:
  - id: minetest-entity-creation-crash
    message: >-
      This might be a crash if the entity does not spawn.
    severity: WARNING
    languages:
      - lua
    patterns:
      - pattern-either:
        - pattern: |
            minetest.add_entity(...):$METHOD(...)
        - pattern: |
            local $ENTITY = minetest.add_entity(...)
            ...
            $ENTITY:$METHOD(...);
      - pattern-not: |
          local $ENTITY = minetest.add_entity(...)
          ...
          if not $ENTITY then return end
          ...
          $ENTITY:$METHOD(...)
      - pattern-not: |
          local $ENTITY = minetest.add_entity(...)
          ...
          if not $ENTITY or not $ENTITY:get_pos() then return end
          ...
          $ENTITY:$METHOD(...)
      - pattern-not: |
          local $ENTITY = minetest.add_entity(...)
          ...
          if $ENTITY then
          ...
          $ENTITY:$METHOD(...)
          ...
          end