Destructor called while object is still alive

[Ola Fosheim Grøstad]

On Friday, 23 October 2020 at 07:39:37 UTC, Daniel N wrote:
> On Friday, 23 October 2020 at 07:32:02 UTC, Ola Fosheim Grøstad 
> wrote:
>> On Friday, 23 October 2020 at 06:15:32 UTC, frame wrote:
>>> Not sure if this is expected behaviour, but I find this weird:
>>> The destructor is called on the object just because it gets 
>>> out of scope?
>>
>> The destructor may not be called at all by the GC, or it might 
>> be called whenever there is no pointer found in 
>> memory/registers. Since D is essentially using C-style 
>> code-gen/optimizers that has little to no knowledge of a GC it 
>> may be called prematurely or never.
>>
>
> Simple fix:
> auto foo = Bar.create();
> =>
> scope foo = Bar.create();

Does not work with LDC -O3:

void main() {
     scope foo = Bar.create();
     GC.collect();
     writefln("Collection done");
     exit(0);
}

Output:

Warning: destructor called (onlineapp.Foo) on 55A899C1C570
Collection done