Static Array Idiom not working anymore.

[Guillaume Piolat]

On Tuesday, 12 June 2018 at 14:44:12 UTC, Steven Schveighoffer 
wrote:
>
> Note to ponce, please update your idioms, this is NOT safe, 
> even within the same function. Just because it does work, 
> doesn't mean it will always work. The language makes no 
> guarantees once the lifetime is over.
>
> -Steve

I thought it was clear enough because the comment said

     // Slice that static array __which is on stack__

but now I see how it can be hard to see the unsafety.