Package: gtk-3.0 Version: 3.22.0-1 Hello,
The problem here is this patch: https://sources.debian.net/src/gtk%2B3.0/3.22.0-1/debian/ patches/016_no_offscreen_widgets_grabbing.patch/ although its counterpart looks similarly old and ill-substantiated: https://sources.debian.net/src/gtk%2B3.0/3.22.0-1/debian/ patches/017_no_offscreen_device_grabbing.patch/ - "The *exact* and *complete* text of any error messages printed or logged. This is very important!" Gdk-CRITICAL assertion 'GDK_IS_WINDOW (window)' failed See full report, backtraces, links to discussions of the offending patch, etc here https://bugzilla.gnome.org/show_bug.cgi?id=771242 - "Exactly what you typed or did to demonstrate the problem." Just use Debian's package of GTK+ 3.22, and try to open any ComboBox that does not have wrap-width manually set, or a CellRendererCombo. - A description of the incorrect behavior: exactly what behavior you were expecting, and what you observed. A transcript of an example session is a good way of showing this. See above at upstream Bugzilla. What I expected was not critical warning every time I open a ComboBox. What I got was just such a warning. This does not inspire confidence. - A suggested fix, or even a patch, if you have one. My suggested fix is to revert these seemingly ill-advised and ill-tested patches, please. They seemingly are not applicable to how GTK+ currently works, if they ever were. And a rationale like "seem like they should not be allowed to do grab the mouse or whatever" does not seem sufficiently substantive to justify critical warnings every time I popup a ComboBox. Thank you.
