RCArray is unsafe

[Walter Bright via Digitalmars-d]

On 3/4/2015 1:16 AM, bearophile wrote:
> Walter Bright:
>> The complexity of a free list doesn't remotely compare to that of adding an
>> ownership system.
> A sound complete ownership system is the only good enough solution for D. That's
> my opinion.

How do you type an an array of pointers with different owners?

How do you deal with the combinatoric explosion of template instantiations with 
all those different ownership types?