Maybe D is right about GC after all !

[Dgame]

On Wednesday, 20 December 2017 at 17:05:41 UTC, Tony wrote:
> I have heard with regard to reference counting as is done in 
> Python, that if two objects each have a reference to the other, 
> that they will never be deleted, even if neither is used 
> elsewhere in the program. Garbage collection is not supposed to 
> have that issue, although I don't know how a garbage collector 
> determines that there usage is just via each other and that 
> they can be deleted.

Here's how PHP does it:
http://php.net/manual/de/features.gc.collecting-cycles.php