Brad Anderson:
You can popFront() for as long as you want well passed the length. Obviously popping off the front of a zero length range isn't valid but I would have expected a range violation to occur rather than it to silently continuing the series with a wrapped around length.
I think it's a matter of design and it's a matter of having an alternative Phobos release that contains asserts too. Adding the test slows down something (iota) that must be as fast as possible. And currently asserts are removed from the compiled Phobos...
Bye, bearophile
