How to debug dispatcher behaviour?

I've been trying to incorporate Incubator\Phalcon\Error into my project, and suddenly my dispatcher->forward doesn't work anymore.

I've got this in a controller action:

        $params = $this->dispatcher->getParams();
        if (empty($params)) {
            $this->dispatcher->forward(
                array(
                    'controller' => 'front',
                    'action' => 'homepage'
                )
            );
        }

But it seems like it passes through the dispatcher->forward, and continues. I did a die(var_dump($this->dispatcher)); after it, and dispatcher does seem to show it should be going to the right place, but it doesn't do that. Can you please advise how to debug this?