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


Thanks for your reply.

A simplified test case is attached. It does not need 3 base classes to

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

-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:

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?

Regis "HPReg" Duchesne
VMware, Inc.

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