var result;
{
  let let_x = 'let x';
  let let_l = [];
  for (var var_x = 1, var_y = 2, var_z = 3; var_x < 10; var_x ++) {
    let l_x = var_x, l_y = var_y, l_z = var_z;
    let_l.push(function() {
      return [l_x, l_y, l_z];
    });
  }
  result = let_l;
}

assert.deepEqual(result.map(function (fn) {
  return fn();
}), [
  [ 1, 2, 3 ],
  [ 2, 2, 3 ],
  [ 3, 2, 3 ],
  [ 4, 2, 3 ],
  [ 5, 2, 3 ],
  [ 6, 2, 3 ],
  [ 7, 2, 3 ],
  [ 8, 2, 3 ],
  [ 9, 2, 3 ]
]);