It's essentially unknowable if anybody has produced code out there that is like this, but the point still stands that it is valid code. If you want to uphold a

It's essentially unknowable if anybody has produced code out there that is like this, but the point still stands that it is valid code. If you want to uphold a commitment to backwards compatibility, you simply cannot extend your language in a way that might possibly change the behavior of valid-but-nonsensical code in the wild.