Re: [jazzplusplus-devel] Core dumpage

[Patrick E. <pa...@pa...>]

Can we work around it by setting the global variables to something?  A 
well commented line could be left in jazz.cpp for when the problem 
goes away.

        Patrick

On Monday 29 March 2004 14:00, Matt Kelly wrote:
> > Hope your fix makes it into the core wxGTK distribution.
> >
> > Have you checked if the bug is still in the wxGTK 2.5 beta?
>
> Nope, but I will check.  I checked wxWindows' bug list for wxString
> bugs, but did not see this one, so I'm not too hopeful.
>
> Matt
>
> > Cheers,
> > /Joakim
> >
> > Matt Kelly wrote:
> > >OK, I've found the problem.  It's a wxGTK bug, in the wxString
> > >class.
> > >
> > >The default constructor initializes a pointer data member (the
> > > member that holds the actual storage) to NULL.  The destructor
> > > blindly dereferences this pointer.  If the string never gets
> > > set to anything, it dereferences a NULL pointer minus an index,
> > > making for a truly horrible pointer value.
> > >
> > >Unfortunately, the wxGTK library has a few global wxString
> > > variables which normally don't get used.  Thus, they contain
> > > these NULL pointers and seg fault on exit when their
> > > destructors get called globally.
> > >
> > >There is a very simple fix, but sadly, the bug is within wxGTK.
> > >If anyone is interested, I'll post the fix.  I'll also contact
> > >the wxWindows team and notify them.
> > >
> > >Matt
> > >
> > >>As Patrick wrote, It's been there as long as I can remember.
> > >>
> > >>It has always annoyed me so it would be great if you could
> > >> eliminate it.
> > >>
> > >>Cheers,
> > >>/Joakim
> > >>
> > >>Matt Kelly wrote:
> > >>>All,
> > >>>
> > >>>I've been looking into why JAZZ dumps core when you exit.
> > >>>I think I may be onto something.  It appears to be dumping
> > >>>core during the destruction of a global wxString located
> > >>>within the wxGTK library itself.  Not sure if it's a wxGTK
> > >>>bug, a wxWindows bug, or if it's something we're causing,
> > >>>but it smells like it might be a wxGTK bug.
> > >>>
> > >>>My question to the group: how many of you see this behavior?
> > >>>I'm asking because I see the same behavior with Audacity.
> > >>>My copy of Audacity came bundled with my SuSE installation.
> > >>>This seems to reinforce my beliefs.
> > >>>
> > >>>Also, interestingly, I grabbed the latest wxGTK source, and
> > >>>compiled it in debug mode, and installed it.  I made Jazz
> > >>>use it for its compiling.  Guess what, same thing on exit!!!
> > >>>
> > >>>I just want to see if other distros see this same behavior.
> > >>>
> > >>>Thanks,
> > >>>
> > >>>Matt
> > >
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