Re: [Monotone-devel] Re: 0.37 dumps on my FreeBSD-6-stable amd64

[Nathaniel Smith]

On Mon, Oct 29, 2007 at 10:33:41AM +0100, Lapo Luchini wrote:
> 177         shared_ptr & operator=(shared_ptr const & r) // never throws
> 178         {
> 179             px = r.px;
> 180             pn = r.pn; // shared_count::op= doesn't throw
> 181             return *this;
> 182         }
>
> ...and I have no clue how a variable assignement could dump a program,
> and only with -O2 with that regard.

Variable assignment can dump a program in this case, given that the
value being assigned is "r.px", and r is a reference, therefore
evaluated r.px involves a pointer dereference.

I'm not sure how one acquires a null reference to a shared_ptr,
though.  Possibly something else is going wrong.  (Have you
valgrind'ed?)

-- Nathaniel

-- 
"If you can explain how you do something, then you're very very bad at it."
  -- John Hopfield