Blocker for the container work

[Andrei Alexandrescu via Digitalmars-d]

I just submitted https://issues.dlang.org/show_bug.cgi?id=15328 which is 
currently blocking my work on containers.

In brief the postblit isn't called upon calling
Range save() { return this; }

which of course is less than helpful.

Reductions of the example would be awesome - I reduced it a fair amount 
compared to the initial code, but I'm sure someone without that context 
could do a much better job.


Thanks,

Andrei