Question

I add an instance of this module to the dispay list and then remove it.
Will the event listener attached to foo create a leak?
A simplified module:

<s:Module creationComplete="init()">
    <fx:Script>
        protected var foo:Bar = new Bar();
        protected function init() {
          foo.addEventListener(MouseEvent.CLICK, foo_clickHandler);
        }

        protected function foo_clickHandler(event:MouseEvent):void {
            //do something
        }
    </fx:Script>
</s:Module>

Answer 1

This module does not have memory leaks since you add listener to a local object, not to a Stage, StyleManager or some other global-accessible stuff.