Actually just came up with a quick way to reproduce this too. It seems to happen when emacs deletes a subwindow. So an easy way to provoke it is to start emacs, type "C-x 2" (control-X then "2") to split the window into two buffers, and then "C-x 1".
Actually just came up with a quick way to reproduce this too. It seems to happen when emacs deletes a subwindow. So an easy way to provoke it is to start emacs, type "C-x 2" (control-X then "2") to split the window into two buffers, and then "C-x 1".