Tricky semantics of ranges & potentially numerous Phobos bugs

[David Nadlinger]

On Wednesday, 17 October 2012 at 15:14:44 UTC, Andrei 
Alexandrescu wrote:
> Such issues do happen, are relatively rare, and are virtually 
> untested because there's been no unittests with a deliberately 
> "bad" input range. Although of course we do need to add the 
> appropriate fixes and unittests, I'm not worried about it at 
> all systemically.

If an abstraction encourages use in a way which leads to 
hard-to-detect logic bugs that do not occur with the most common 
test cases, this is _exactly_ the thing we should be worried 
about!

David