var C = function C() {
  "use strict";

  babelHelpers.classCallCheck(this, C);
  babelHelpers.defineProperty(this, "y", babelHelpers.classPrivateFieldGet(this, _x));

  _x.set(this, void 0);
};

var _x = new WeakMap();

expect(() => {
  new C();
}).toThrow();
