The service definition "action_provider" does not exist
It seems on my install that the function form_processor_civicrm_container is called first for form_processor which then crashes CiviCRM because action_provider has not been defined yet.
Symfony\Component\DependencyInjection\Exception\InvalidArgumentException: The service definition "action_provider" does not exist. in Symfony\Component\DependencyInjection\ContainerBuilder->getDefinition() (line 868 of /home/dev/civicrm-buildkit/build/dmaster/sites/all/modules/civicrm/vendor/symfony/dependency-injection/Symfony/Component/DependencyInjection/ContainerBuilder.php).