Re: [sigc] SEGV while using libsigc++ in an apparently legit way

[Murray Cumming <murrayc murrayc com>]

On Fri, 2005-03-04 at 10:22 -0800, R�s Duchesne wrote:
> Murray,
> 
> Thanks for your reply.
> 
> > A simplified test case is attached. It does not need 3 base classes to
> > crash.
> 
> Interesting. On my system, I came up with a minimal test case. If I 
> removed a single line from it, then the problem would not show up. But I 
> will try your test case.
> 
> > However, we'd rather have a libsigc++-only test case rather than one
> > that uses gtkmm too, and the g++ developers would want one that did not
> > involve even libsigc++.
> 
> I have already spent 2 hours to come up with this small test case and 
> report the bug. I understand that it has dependencies, but quite frankly 
> I think it will be easy to reproduce for anybody. I'm not planning to 
> spend more time on making it even smaller. You are asking for a bit too 
> much here.
> 
> > I left out the "-v -save-temps -O -g". They aren't necessary to make it
> > crash.
> 
> -v and -save-temps are required when sending a bug report to gcc (this 
> is bug number 20304 in gcc's bugzilla by the way).
> 
> On my system, -O is needed to reproduce the issue.
> 
> > It segfaults for me, on Fedora Core 3,
> > [murrayc murrayclaptop ~]$ g++ --version
> > g++ (GCC) 3.4.2 20041017 (Red Hat 3.4.2-6.fc3)
> > 
> > The valgrind output is attached, from after pressing the Discard button.
> > I used 
> > valgrind --tool=memcheck --num-callers=20 ./a.out
> 
> I don't see the attachment.
> 
> > This probably belongs in bugzilla, where it can be explored more. You should give full details about your platform there.
> 
> In order to report this bug, I read the instructions at:
> 
>     http://libsigc.sourceforge.net/devel.shtml#mail
> 
> quoting:
> "
> There is a mailing list, libsigc-list gnome org for Libsigc++, to serve 
> as a design discussion area as well as a place to report bugs.
> "
> 
> Do you want me to report it in libsigc++'s bugzilla as well?

Yes, please.

-- 
Murray Cumming
murrayc murrayc com
www.murrayc.com
www.openismus.com