Memory leak in foreach

[Andrea Fontana]

On Wednesday, 20 February 2019 at 15:52:06 UTC, H. S. Teoh wrote:
> It's a different question of whether it should be a compile 
> error to use `foreach(ref)` on a range whose .front doesn't 
> return by ref.  That's a much more sticky issue that you may 
> not want to get into. :-D  Fix the dtor bug first, then we can 
> decide whether we want to pursue this question.

Eh, you summed up my idea perfectly.
Isn't exactly what my pull request is doing?

Andrea