What should happen here?

[Kagamin]

On Tuesday, 21 September 2021 at 12:02:05 UTC, Steven 
Schveighoffer wrote:
> I just thought of a possible easy and effective way to ensure 
> the thing isn't collected early:
>
> ```d
> struct Pin(T)
> {
>    T t;
>    @nogc nothrow pure @safe ~this() {}
>    alias t this;
> }
>
> ...
> // usage
> auto c = Pin!C(new C); // now it needs to be held until the 
> scope ends
> ```

Another way:
```
struct Pin(T)
{
    T t;
    ~this()
    {
       import core.volatile;
       volatileLoad(cast(uint*)&t);
    }
}

// usage
auto c = Pin!C(new C);
```