Does anyone understand how to use "shared" types with concurrency send/receive functions?

[Kagamin via Digitalmars-d-learn]

On Wednesday, 16 August 2017 at 13:14:55 UTC, Steven 
Schveighoffer wrote:
> But that isn't a concern for Variant. It is only calling the 
> postblit, which does work.

Shouldn't it call destructor when it goes out of scope?