function drupal_onrevue1_form_user_register_submit($form, &$form_state){

    //$form_state['rebuild'] = TRUE;
    $form_state['redirect'] = "user/login";
    //print_r($form_state);die();
   $edit = array(
          'name' => $form_state['values']['name'],
          'pass' => $form_state['values']['current_pass'],
          'field_first_name' => array(LANGUAGE_NONE => array(array('value' => $form_state['values']['field_first_name']))),
          'field_last_name' => array(LANGUAGE_NONE => array(array('value' => $form_state['values']['field_last_name']))),
          'field_middle_name' => array(LANGUAGE_NONE => array(array('value' => $form_state['values']['field_middle_name']))),
          'field_year_select' => array(LANGUAGE_NONE => array(array('value' => $form_state['values']['field_year_select']))),
          'field_month_select' => array(LANGUAGE_NONE => array(array('value' => $form_state['values']['field_month_select']))),
          'field_date_select' => array(LANGUAGE_NONE => array(array('value' => $form_state['values']['field_date_select']))),
          'field_gender' => array(LANGUAGE_NONE => array(array('value' => $form_state['values']['field_gender_select']))),
          'mail' => $form_state['values']['field_mail'],
          'init' => $form_state['values']['field_mail'],
          'status' => 1,
          'access' => REQUEST_TIME,
    );

    $account->is_new = TRUE;
    $hello = user_save($account, $edit);
    //print_r($hello);die();

}

$username = $form_state['values']['name'];
$pass = trim($form_state['values']['current_pass']);
$userRecord = user_authenticate($username, $pass);
$form_state['uid'] = $userRecord;
user_login_submit(array(), $form_state);

$fully_loaded_user_object = user_save($account); //returns user obj on success otherwise FALSE
if ($fully_loaded_user_object) {
  $GLOBALS['user'] = $fully_loaded_user_object;
}

/*
 * implements hook_user_insert(&$edit, $account, $category)
 */
function mymodule_user_insert(&$edit, $account, $category) {
    $newly_registered_user_id = $account->uid;

    // credit: ML and https://www.drupal.org/project/login_activity/issues/2066899 (second snippet of code)
    global $user;
    $user = user_load($newly_registered_user_id);
    drupal_session_regenerate();
}