Bug#782075: gnome-tweak-tool: Crashes Gnome when reducing Number of Workspaces

[Andreas Henriksson]

Control: reassign -1 mutter

Hello!

On Sun, Apr 12, 2015 at 08:02:39PM +0200, jre wrote:
[...]
> Apr 12 18:01:58 hope gnome-session[1257]: mutter:ERROR:core/screen.c:1250:update_num_workspaces: assertion failed: (w->windows == NULL)
[...]

So it seems to be mutter crashing on an assertion failure, reassigning.
More information on your exact way to attempt to reproduce could be useful.
Exact number of workspaces, number of windows open and on which workspace
they reside, etc....

https://wiki.debian.org/HowToGetABacktrace

If not even you can reproduce the problem I guess it will be hard to
get anywhere. In case you manage to do it again, please try with the
new mutter version that should be available in sid/unstable today/tomorrow.

Regards,
Andreas Henriksson