[saurik]

It is "removing" undefined behavior by simply defining it to be something no one would ever ever want ;P. If you are willing to just define behavior arbitrarily then I think you will find the vast majority of (but admittedly not all) undefined behaviors can be made "safe".

[ChrisSD]

Nobody wants undefined behaviour. That's always worse than defining it, whatever that definition is. In any case, there are better options for selecting the behaviour you want instead of using `as`.