What should happen here?

[Johan]

On Monday, 20 September 2021 at 18:26:59 UTC, Steven 
Schveighoffer wrote:
> Without any context, what do you think should happen here?
>
> ```d
> import std.stdio;
> import core.memory;
> class C
> {
>    ~this() { writeln("dtor"); }
> }
>
> void main()
> {
>    auto c = new C;
>    foreach(i; 0 .. 10000) GC.collect;
>    writeln("end of main");
> }
> ```
>
> Option 1:
> ```
> end of main
> dtor
> ```
>
> Option 2:
> ```
> dtor
> end of main
> ```
>
> Option 3:
> ```
> end of main
> ```
>
> Option 4:
> Option 1 or 2, depending on entropy.
>

I believe all options are valid, because there is no guarantee if 
and when class destructors are called.
I'm guessing without optimization, option 3 will happen most.
With optimization turned on, option 2. Or maybe the object is put 
on the stack (`scope` or LDC's heap->stack optimization) and so 
option 1 happens?

-Johan