Compiler Reports Binding Warning but still does the binding

Steps to reproduce:
1. Run the attached application, clicking the "Switch Foo" button.

Actual Results:
binding to the foofunction still occurs, despite warning "[Bindable] requires an event name parameter when applied to a function that is not a getter or setter. "

Expected Results:
Binding should not occur on the function, because there is no event parameter, OR no warning should appear.

Workaround (if any):