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Matthias Clasen authored
When validating the style context, we are copying the animations from one StyleValues instance to another, and cancel the old ones. It turns out that sometimes the old and the new StyleValues are the same, and in this case, we end up cancelling the animations for good. One case where breakage from this was observed is that the spinners in gtk3-widget-factory stop spinning when you open and close a modal dialog on page 2. This depends a bit on the window manager; the problem can only be seen if opening the dialog causes a transition to backdrop.
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