[Wayland-bugs] [Bug 761156] [Wayland] Setting a popover 'relative_to' a widget on an offscreen window crashes gtk+

[gtk+ (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=761156

--- Comment #9 from Jonas Ådahl <jadahl at gmail.com> ---
(In reply to Matthias Clasen from comment #7)
> Review of attachment 322536 [details] [review]:
> 
> This feels wrong to me to check for an offscreen window in this one place.
> Can we not instead fix up the transient loop check to not croak ?

If we don't check it there, or skip setting the transiency in the realize
function, we pass, according to the API, invalid input to
gdk_window_set_transient_for(). gdk_window_set_transient_for() takes two
toplevel GdkWindow's, so passing an offscreen GdkWindow as a parent is not
valid.

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