Bug#884648: mate-panel occasionally crashes with segfault - upstream report
There's an upstream bug report for the gtk_drag_finish crash: https://github.com/mate-desktop/mate-panel/issues/1356
Bug#999583: Rearranging window list causes segfaults - upstream report
There's an upstream bug report with further debugging info: https://github.com/mate-desktop/mate-panel/issues/1356
