Drush cron : Drush command terminated abnormally due to an unrecoverable error

I have the following output :

Load alias @sites [notice]
You are about to execute 'cron' non-interactively (--yes forced) on all of the following targets:
/test/#test.net
Continue? (y/n): y
/usr/local/bin/php /usr/local/lib/php/drush/drush.php [notice]
--php=/usr/local/bin/php --backend=2
--php=/usr/local/bin/php
--root=/test/ --yes --verbose
--uri=test.net cron 2>&1
Initialized Drupal 7.12 root directory at [notice]
/test/
Initialized Drupal site test.net at sites/test.net [notice]
Drush command terminated abnormally due to an unrecoverable [error]
error.

When I try this command on crontab :

* * * * * /usr/bin/env PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin COLUMNS=72 /usr/local/bin/drush --root=/test/ @sites --v cron --yes