Why does casting a function generate a run-time abort?

[Christoph Hellwig]

On Fri, Jun 18, 2004 at 01:11:43AM -0700, Zack Weinberg wrote:
> Andrew Pinski <pinskia@physics.uc.edu> writes:
> 
> >> Lemme ask you why Objective-C message dispatch needs this.  It's
> >> impossible to get "right" on IA64 and a few others.
> >
> > It is only needed with the NeXT^wApple runtime :) so ...
> > The GNU runtime does not produce these casts at all and is safe.
> 
> Well, ok, but that doesn't answer my question.

It pretty much means, no Objective-C doesn't need it as the GNU runtime
shows it..