Fatal error: Call-time pass-by-reference has been removed in /var/www/portal_teoriadebate/sites/all/modules/custom/custom.module on line 175

Call Stack:
    0.0001     234424   1. {main}() /var/www/portal_teoriadebate/index.php:0
    0.0012     434112   2. drupal_bootstrap() /var/www/portal_teoriadebate/index.php:15
    0.0225    2370728   3. _drupal_bootstrap() /var/www/portal_teoriadebate/includes/bootstrap.inc:1411
    0.0239    2775440   4. _drupal_bootstrap_full() /var/www/portal_teoriadebate/includes/bootstrap.inc:1554
    0.0289    3986344   5. module_load_all() /var/www/portal_teoriadebate/includes/common.inc:2656
    0.2189   18763624   6. drupal_load() /var/www/portal_teoriadebate/includes/module.inc:13