Function sourceFromStacktrace

tests/qunit/qunit.js:538–552

( offset )

  }

  function sourceFromStacktrace( offset ) {
    var error = new Error();

    // Support: Safari <=7 only, IE <=10 - 11 only
    // Not all browsers generate the `stack` property for `new Error()`, see also #636
    if ( !error.stack ) {
      try {
        throw error;
      } catch ( err ) {
        error = err;
      }
    }

    return extractStacktrace( error, offset );
  }

  function synchronize( callback, last ) {
    if ( QUnit.objectType( callback ) === "array" ) {