Passing an async function to settings.ajax causes error when reload is called

Passing an async function to settings.ajax causes an "xhr.abort is not a function" error when reload is called:

Testcase:
http://live.datatables.net/kevuqoro/1/edit?html,js,console,output

Code

  var tableAsync = $('#async').DataTable({
    ajax: async (dtAjaxData, callback) => {
      callback({
        draw: dtAjaxData.draw,
        recordsTotal: 0,
        recordsFiltered: 0,
        data: [],
      });
    },
  });

  tableAsync.ajax.reload();

Error

jquery.dataTables.js:7582 Uncaught TypeError: xhr.abort is not a function
    at __reload (VM48 jquery.dataTables.js:7582)
    at _Api.<anonymous> (VM48 jquery.dataTables.js:7644)
    at _Api.iterator (VM48 jquery.dataTables.js:7029)
    at _Api.<anonymous> (VM48 jquery.dataTables.js:7643)
    at Object.reload (VM48 jquery.dataTables.js:7196)
    at HTMLDocument.<anonymous> (<anonymous>:26:19)
    at j (VM47 jquery-1.11.3.min.js:2)
    at Object.fireWith [as resolveWith] (VM47 jquery-1.11.3.min.js:2)
    at Function.ready (VM47 jquery-1.11.3.min.js:2)
    at HTMLDocument.J (VM47 jquery-1.11.3.min.js:2)