symfony/symfony — pull request #12263 by unkind (2014-10-20 12:37:31+00:00)
Title: [EventDispatcher] Fixed RegisterListenersPass (ContainerAwareEventDispatcher)

| Q | A
| ------------- | ---
| Bug fix? | sort of, minor
| New feature? | no
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets | n/a
| License | MIT
| Doc PR | n/a

I use Symfony components as standalone libraries, so it wasn't obvious for me that `RegisterListenersPass` requires `ContainerAwareEventDispatcher`:
```
PHP Fatal error: Call to undefined method Symfony\Component\EventDispatcher\EventDispatcher::addListenerService()
```