Notice : Undefined offset: 5 dans _civicrm_member_roles_sync()

Some times there is this Notice:
Notice : Undefined offset: 5 dans _civicrm_member_roles_sync() (ligne 587 dans /xxxxxxx/sites/all/modules/civicrm/drupal/modules/civicrm_member_roles/civicrm_member_roles.module).

This offset concern expired role.
This come from a bug in line 568 where it is missing an 's' : the expired element should be removed from $membership*s*, not $membership.

foreach ($memberships['values'] as $key => $membership) {
        if (in_array($membership['status_id'], $inactive)){
          unset($memberships['values'][$key]);
        }
      }