[{
  get y() {
    throw new Test262Error('The property should not be accessed.');
  },
  set y(val) {
    setValue = val;
  }
}.y = 42] = [23];
({ x: {
  get y() {
    throw new Test262Error('The property should not be accessed.');
  },
  set y(val) {
    setValue = val;
  }
}.y = 42 } = { x: 23 });