Ownership semantics

[Matt Elkins via Digitalmars-d-learn]

On Sunday, 31 January 2016 at 20:20:52 UTC, Steven Schveighoffer 
wrote:
> Oh, nevermind. This is actually simpler.
>
> You can't do memory operations inside a destructor during 
> collection. I forgot about that.
>
> But the rule I stated is still in force.
>
> -Steve

So this implies that the UniquePtr implementation originally 
posted might work with malloc/free calls, or some other non-GC 
allocator...of course, in that case one could just use 
std.typecons.Unique.