Bad first line in window when switching selective display on

[Jens Schmidt]

This bug report will be sent to the Free Software Foundation,
 not to your local site managers!!
Please write in English, because the Emacs maintainers do not have
translators to read other languages for them.

In GNU Emacs 20.7.1 (i386-*-nt4.0.1381)
 of Tue Jun 13 2000 on buffy
configured using `configure NT'

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:


I start emacs with emacs -q.  In scratch buffer I evaluate the
following expressions:

(window-width)
80
(window-height)
39
(defun prepare-bug ()
  (insert "abcdef")
  (let ((i 0) (n 200))
    (while (< i n)
      (insert "1234567890\r\r")
      (setq i (1+ i))))
  (insert "\n\n"))
prepare-bug



Now I enter the following key sequences:

C-x 4 b *xxx* RET
M-: (prepare-bug) RET

(window starts with 90^M^M1234 etc. which is correct)

M-: (setq selective-display t) RET

(window starts with 90... which is an error)

C-L

(window starts with abcdef1234567890... which is correct)



Regards

Jens