/*---
esid: prod-OptionalExpression
features: [optional-chaining]
---*/
const obj = {
  a: {
    b: 22
  }
};

function fn() {
  return {};
}

setTimeout(err => {
  var _obj$a;

  // OptionalExpression (MemberExpression OptionalChain) OptionalChain
  if ((obj === null || obj === void 0 ? void 0 : (_obj$a = obj.a) === null || _obj$a === void 0 ? void 0 : _obj$a.b) === 22) throw Error('an exception');
}, 5);
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