[jaunty] amd64 segfault with listen 0.6.2.0

[Francesco Duraccio]

Hi,

When try to launch listen 0.6.2-0~ppa1, occurs segmentation fault, this is what i have found in kern.log

May 16 12:39:31 odo-ds9 kernel: [ 8509.584444] python[23632]: segfault at f ip 0000000000467b8c sp 00007fff8744eb68 error 4 in python2.6[400000+2160

please if you need appport-collect, feel free to ask about this.
Thx in advance.

[Julien Valroff (julienv)]

The same issue was also reported by a Debian user, using listen 0.6.1-1 and python2.5.

See http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=528853

Cheers,
Julien

[Colomban Wendling (banw)]

Hi,

I have the same bug here (Debian unstable) both with self-compiled SVN r1119 and Debian's versions.

I just want to add some more infos in case of usefulness:
This bug was not present when I was using Testing (yesterday, I just upgraded to unstable this night), with exactly the same Listen version (I only rebuilt the package after upgrade).
Then I think it is a bug related to used libraries or so.

Regards,
Colomban

[Julien Valroff (julienv)]

Le vendredi 22 mai 2009 à 12:06 +0000, Ban a écrit :
> Hi,
>
> I have the same bug here (Debian unstable) both with self-compiled SVN
> r1119 and Debian's versions.
>
> I just want to add some more infos in case of usefulness:
> This bug was not present when I was using Testing (yesterday, I just upgraded to unstable this night), with exactly the same Listen version (I only rebuilt the package after upgrade).
> Then I think it is a bug related to used libraries or so.

I do not suffer from this bug using unstable on amd64 - have you
installed any of the suggested packages (which might cause this issue)?

Cheers,
Julien

[Colomban Wendling (banw)]

I'm on amd64 too, and I had almost all suggests installed, but it doesn't work better with only the following suggests:
  * gstreamer0.10-plugins-bad
  * python-gnome2
recommands:
  * gnome-icon-theme
  * gstreamer0.10-esd
  * gstreamer0.10-x
  * python-avahi
  * python-daap
  * python-gpod
  * python-musicbrainz2

Tell me if I should try to remove one of these (e.g. if you have not it), but they needs more care for me as I have packages depending on it.

[Julien Valroff (julienv)]

Le vendredi 22 mai 2009 à 13:17 +0000, Ban a écrit :
> I'm on amd64 too, and I had almost all suggests installed, but it doesn't work better with only the following suggests:
> * gstreamer0.10-plugins-bad
> * python-gnome2
> recommands:
> * gnome-icon-theme
> * gstreamer0.10-esd
> * gstreamer0.10-x
> * python-avahi
> * python-daap
> * python-gpod
> * python-musicbrainz2
>
> Tell me if I should try to remove one of these (e.g. if you have not
> it), but they needs more care for me as I have packages depending on it.

I have made some tests with the various suggests and still work on my
system.

I have just uploaded listen 0.6.2-1 to debian, freshly built in an
updated clean chroot - please test it one it hits your mirror and report
whether it fixes the issue or not...

Cheers,
Julien

[Colomban Wendling (banw)]

No, the updates doesn't change anything for me.

But I just tried to run Listen inside GDB, then I have installed python-gst0.10-dbg and python-gtk2-dbg, and now I got the following warning:
  (listen:1142): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libgstpython_d.so': /usr/lib/gstreamer-0.10/libgstpython_d.so: undefined symbol: _Py_RefTotal
Not sure of what it means?

Well, I join the GDB backtrace if it could help.

[Julien Valroff (julienv)]

Le vendredi 22 mai 2009 à 16:12 +0000, Ban a écrit :
> No, the updates doesn't change anything for me.
>
> But I just tried to run Listen inside GDB, then I have installed python-gst0.10-dbg and python-gtk2-dbg, and now I got the following warning:
> (listen:1142): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libgstpython_d.so': /usr/lib/gstreamer-0.10/libgstpython_d.so: undefined symbol: _Py_RefTotal
> Not sure of what it means?

It seams it is a warning only.

I also get this warning but do not suffer from the segfault.

> Well, I join the GDB backtrace if it could help.

Thanks, will have a look at it

Cheers,
Julien

[Julien Valroff (julienv)]

Le vendredi 22 mai 2009 à 16:12 +0000, Ban a écrit :
[...]
> Well, I join the GDB backtrace if it could help.
>
> ** Attachment added: "Python/Listen debugging output"
> http://launchpadlibrarian.net/27057319/listen_gdb_output

I think I have found the origin of the issue:
http://bugzilla.gnome.org/show_bug.cgi?id=578419

It would also affect:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=519664
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=526003

and this one is also related if I am right:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=519758

Cheers,
Julien

[Colomban Wendling (banw)]

Hey!

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=519664#42 suggested a way to fix this issue, and it seems to work for me!
I join the patch that make Listen always inherit at least from object. Not sure of its quality, a review would probably be useful, e.g. to complete it; because I only added "object" parent to classes that didn't inherit at all, not sure there's classes that still miss their object parent.

Regards,
Colomban

[Mehdi Abaakouk (sileht)]

Patch work fine, i have no more segment fault, thank