D - dynamic_cast only?

[Steve Teale]

On Sun, 25 Dec 2011 08:37:21 +0000, Steve Teale wrote:

So what do you think is happening here?

      ColorSelectionDialog csd = new ColorSelectionDialog("Choose a 
Color");
writefln("csd %s", csd);
void* vp = cast(void*) csd.getColorSelection();
      ColorSelection cs = cast(ColorSelection) vp;
writefln("cs  %s", cs);
      cs.setCurrentColor(cto.baseColor);
writeln("A");

Output:

csd gtk.ColorSelectionDialog.ColorSelectionDialog
cs  gtk.Widget.Widget
Segmentation fault

The segfault is presumably because Widget does not have a setCurrentColor 
method, but why is the cast being ignored? Is the compiler optimizing the 
intermediate cast to void away? I don't find the asm from obj2asm helpful.

Steve