Comment #2 on issue 591 by pekka.klarck: Inheriting ExecutionFailed exception without calling ExecutionFailed.__init__ crashes test execution with RF 2.5
http://code.google.com/p/robotframework/issues/detail?id=591
I don't think anything should be done on RF side. Not calling __init__ of the class you extend is a bug in the client code. There are countless ways you can crash the execution if you use the internal modules wrong way. Adding workarounds for them in the framework doesn't, in my opinion, make much sense.
