bug#38966: 27.0.60; Assertion failure in set_cursor_from_row

[martin rudalics <rudalics@gmx.at>]

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 > I seem to be unable to do that, so please show detailed instructions
 > starting from "emacs -Q".  What I get here is a very thin single line
 > of text, where I still see the cursor (partially) and can type text.

I attach a new file test-popup-3.el.  With emacs -Q load it, type F1,
then F2.  After C-x o I can move through the lower window without
seeing any cursor or text line.  I also attached two screenshots, one
before C-x o and one after.  If you look hard enough, you can spot the
remnants of the scroll bar on the lower window's mode line.

martin

[-- Attachment #2: test-popup-3.el --]
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(defun foo-message (&optional newline)
  (message
   (concat (if newline "\n" "")
	   "total: %s, body: %s, mode: %s")
   (window-pixel-height) (window-body-height nil t)
   (window-mode-line-height)))

(defun split-window-2 ()
  (interactive)
  (split-window nil -2))

(global-set-key [f1] 'split-window-2)

(defun test-popup ()
  (interactive)
;;   (set-face-attribute 'mode-line nil :height 200)
;;   (set-face-attribute 'mode-line-inactive nil :height 200)
  (setq
   mode-line-format
   (cons (propertize " " 'display
                     (create-image "/* XPM */ static char * image[] = {
\"3 60 1 1\",
\"0 c #00aaff\",
\"000\",\n\"000\",\n\"000\",\n\"000\",\n\"000\",
\"000\",\n\"000\",\n\"000\",\n\"000\",\n\"000\",
\"000\",\n\"000\",\n\"000\",\n\"000\",\n\"000\",
\"000\",\n\"000\",\n\"000\",\n\"000\",\n\"000\",
\"000\",\n\"000\",\n\"000\",\n\"000\",\n\"000\",
\"000\",\n\"000\",\n\"000\",\n\"000\",\n\"000\",
\"000\",\n\"000\",\n\"000\",\n\"000\",\n\"000\",
\"000\",\n\"000\",\n\"000\",\n\"000\",\n\"000\",
\"000\",\n\"000\",\n\"000\",\n\"000\",\n\"000\",
\"000\",\n\"000\",\n\"000\",\n\"000\",\n\"000\",
\"000\",\n\"000\",\n\"000\",\n\"000\",\n\"000\",
\"000\",\n\"000\",\n\"000\",\n\"000\",\n\"000\"
};" 'xpm t :ascent 'center))
	 mode-line-format))
  (foo-message t))

(global-set-key [f2] 'test-popup)

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