babel/packages/babel-plugin-transform-es2015-parameters/test/fixtures/parameters/default-eval/expected.js

var x = "outside";
function outer() {
  var a = arguments.length <= 0 || arguments[0] === undefined ? function () {
    return eval("x");
  } : arguments[0];
  return function () {
    var x = "inside";
    return a();
  }();
}
outer();