services_autorun_bundles alone, causes errors in policy

{
  "classes": { "services_autorun_bundles": ["any"] },
}

   error: Unresolved variable '@(services_autorun.inputs)' in input list, cannot parse
   error: Unresolved variable '@(services_autorun.inputs)' in input list, cannot parse

    !(services_autorun|services_autorun_inputs|services_autorun_bundles)::
      # If services_autorun is not enabled, then we should not extend inputs
      # automatically.
      "inputs" slist => { };
      "found_inputs" slist => {};
      "bundles" slist => { "services_autorun" }; # run self

    services_autorun|services_autorun_inputs|services_autorun_bundles::
      "inputs" slist => { };
      "bundles" slist => { "autorun" }; # run loaded bundles