[Wayland-bugs] [Bug 784319] Sometimes tooltip_popup_timeout() in gtk/gtktooltip.c causes crash after closing a window

[gtk+ (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=784319

--- Comment #21 from Takuro Ashie <ashie at clear-code.com> ---
(In reply to Martin Stransky from comment #20)
> I see that the CSD/Wayland code path is under gtk_widget_get_has_window
> (widget) condition which looks like Gtk is aware about window owned by
> container:

Sorry, you are right.
My explanation about gtk_widget_get_has_window() is incorrect.
gtk_widget_get_has_window() returns TRUE by default:

  https://git.gnome.org/browse/gtk+/tree/gtk/gtkwidget.c#n8202
  (priv->no_window == 0 by default)

In addition, when gtk_widget_get_has_window() is FALSE, a parent GdkWindow is
used for the widget's GdkWindow, it doesn't create its own GdkWindow.


On the other hand the explanation about "unrealize" is correct.
I confirmed that it's not called so that no one destroy the GdkWindow of
MozContainer. When MOZ_WAYLAND isn't defined, it's destroyed by the following
line:

  https://git.gnome.org/browse/gtk+/tree/gtk/gtkwidget.c#n10589

But when I address it, sometimes another similar crash occurs.
It's more rare than before...
We should continue it at https://bugzilla.redhat.com/show_bug.cgi?id=1467104.

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