RE: [boost] Re: [wave] cw-8.3 segfault..

From: Hartmut Kaiser (hartmut.kaiser_at_[hidden])
Date: 2005-05-17 07:41:37

David Abrahams wrote:

> > This I don't understand anymore. The code in question is:
> >
> >     some_spirit_grammar g;
> >     boost::spirit::pt_parse(it, end, g);
> >
> > the programm crashes inside pt_parse because of g == 0xcccccccc 
> > (destroyed object), where pt_parse takes 'g' by const reference. 
> > Initially 'g' was defined as a function local static 
> instance, which 
> > I've removed now because I had the suspicion CW8.x couldn't 
> handle that correctly.
> >
> > Any clues?
> > Regards Hartmut
> 
> Are you running into the CW 8.3 "CRTP bug" where casting to a 
> derived class reference can induce a copy?

That's possible, since Spirit passes the parser<> base class around and
casts it to the correct derived class (type supplied through CRTP) when
needed. Is there a known workaround?

OTOH all the Spirit tests should fail if this assumption is correct.

Regards Hartmut