Is command-line upgrade broken on CiviCRM 4.7.7?
Someone actually provided the answer to another person on the CiviCRM chat channel, so I'm posting it here:

&lt;juri_&gt; "You have requested a non-existent service 'sql_triggers'."
&lt;juri_&gt; anyone care to take a guess? this is civi on drupal 8.
&lt;mollux&gt; juri_ clear the CiviCRM cache, had the same issue yesterday