Append to 'map' result

[Jean-Louis Leroy via Digitalmars-d-learn]

On Wednesday, 5 July 2017 at 00:28:01 UTC, Ali Çehreli wrote:
> On 07/04/2017 04:57 PM, Jean-Louis Leroy wrote:
>>[...]
> No time to dig deeper but this is because the two ranges that 
> chain() receives do not have a common type. (Rather, that type 
> is 'void'):
>
> [...]

I suspect that that is the reason, although I checked in several 
ways that I had ClassInfo elements on both sides. Ok, I'll keep 
looking tomorrow with a fresh eye...