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We might have a stage view listener attached to the stage itself if the actor didn't have a suitable frame clock when the actor was associated with the timeline. We'd then listen to stage-views-changed signals on the stage itself to be able to attach to a frame clock when one appeared. What went wrong is that if an actor that didn't have a frameclock was associated with a timeline, but then destroyed, the timeline would disassociate itself from the actor, but it'd still listen on the stage-views-changed signal on the stage. This would be in itself harmless, until the timeline itself is destroyed, as at this point, it wouldn't clean up the stage-views-changed listener on the stage, as it's assumed to only be valid when there is an actor attached. Fix this issue by cleaning up the stage's stage-views-changed listener when the actor is destroyed, as we wouldn't be able to make use of it by then anyway. Closes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3323 Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1719> |
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