e644cb4577ad0e9d1d918ec75e7aae540dd358ff
Various playlist operations can change region-properties which results in Region::send_change being emitted while the Playlist::RegionWriteLock is held. This can result in recursive lock and/or deadlocks or crashes. e.g. Insert time -> Playlist::shift -> Region::RegionPropertyChanged -> EditorSummary::set_background_dirty -> Editor::session_gui_extents -> Playlist::get_extent -> read-lock is taken after write-lock.
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