http://symfony.com/doc/master/cookbook/security/voters.html#checking-for-roles-inside-a-voter

This works with current release (3.0.4), but not with current master.
I get this error:

[Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException]

Circular reference detected for service "debug.security.access.decision_manager", path: "debug.security.access.decision_manager".

Reproducible by this branch of symfony-standard:
https://github.com/gharlan/symfony-standard/tree/voter-with-decision-manager

You can see the error in composer install (ScriptHandler::clearCache).