gnome-tweak-tool prints the error and quit.

Regards,
Jérémy.

Updating gnome-tweak-tool to 3.8.0 fixes the issue.

Regards,
Jérémy.

Hello Jérémy Lal!

gnome-tweak-tool 3.6.1 works fine here.
You mentioned updating to 3.8.0 solved your issue. I suspect this is
not the real solution.....

I think the original problem is somewhere to be found in
gnome-tweak-tool (3.6.1-1) not depending on new enough versions
of something....

I've compared your list with what I have installed and I have
newer versions (from experimental) of several components.

On Fri, Jun 21, 2013 at 12:39:42PM +0200, Jérémy Lal wrote:
[...]
[...]

My primary suspects would be gsettings-desktop-schemas and maybe
gir1.2-gnomedesktop-3.0. Could you please upgrade these, one by one
and test which one makes gnome-tweak-tool 3.6.1-1 work for you?

Please provide a full list of the above mentioned packages
and their installed version on your system when you find something!

You're right, gnome-tweak-tool 3.6.1 starts after having upgraded
gnome-shell (and its dependencies) to 3.8.x versions. Which i did
before i tried gnome-tweak-tool 3.8.0... I shouldn't have filed
a bug report during such an upgrade session...
I couldn't get valuable information about which package or which
version was the fix. I suspect the upgrade made gnome-tweak-tool
not raise the deprecation warning that was causing a possible
python-gi bug.

Jérémy.

On Sun, Jun 23, 2013 at 11:15:37PM +0200, Jérémy Lal wrote:
[...]

Please run 'dpkg -l gir1.2-gconf-2.0 gir1.2-gnomedesktop-3.0 gir1.2-gtk-3.0 gnome-shell-common gsettings-desktop-schemas python python-gi'
and include the result.

For the record, I've tried installing
gnome-tweak-tool 3.6.1-1 from experimental
on a debian wheezy system and could not reproduce
the reported problem.