Re: [jazzplusplus-devel] Core dumpage

[Dave F. <dav...@co...>]

Matt,

I forwarded this email to Audacity-devel because it's affecting them, too.  
Would you be able to point to a file, line, or possible a viewcvs link to the 
broken code?  Or just tell me where to look and I'll dig it up.  :)

I don't think cross-posting will work here, unless you guys are all members of 
the audacity-devel list (which would make cross-pointing almost pointless 
anyway), because I think it's a subscriber-only list now.

Thanks,

Dave

On Monday 29 March 2004 07:47 pm, 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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