Union copy

["Luís]

On Wednesday, 23 October 2013 at 18:19:14 UTC, Luís Marques wrote:
>     void main()
>     {
>         long srcL = 0x7ff7a50200000000;
>         double* srcD = cast(double*) &srcL;
>         double dst = *srcD;
>
>         writef("src: %x\n", srcL);
>         writef("dst: %x\n", *cast(long*) cast(void*) &dst);
>     }
>
> If this is valid, the question seems to be why the 
> quiet/signaling flag is changed.

(changed during the dst = *srcD assignment, I suppose):

     src: 7ff7a50200000000
     dst: 7fffa50200000000