Breaking term page feed

visiting the page
/taxonomy/term/29/feed

Displays:
The website encountered an unexpected error

For anonymous and user 1

watchdog record:
Recoverable fatal error: Argument 2 passed to url() must be an array, null given, called in /var/www/dmotion/modules/taxonomy/taxonomy.module on line 725 and defined in url() (line 2065 of /var/www/dmotion/includes/common.inc).

Lines 724 and 725 of taxonomy.module:

  $uri = entity_uri('taxonomy_term', $term);
  $variables['term_url']  = url($uri['path'], $uri['options']);

I have all RSSpermissions module permisions enabled.
I have very few modules enabled (Pathauto, CTools and Views), but I'm not using the Views for term page.

Disabling Rss permissions module fixed the problem