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Depending of float rounding during target calculation, the size of the GtkRevealer can be set to zero will the animation is not finished. If the GtkRevealer is in a GtkPaned, it will be hidden and so the animation will be stopped before it is finished. In this case, force the emission of the child-revealed signal to let client code know the animation is finished. https://bugzilla.gnome.org/show_bug.cgi?id=765973
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