C-n doesn't move point when selective-display enabled

[Eric Hanchrow]

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

Place the following in a file named `/tmp/x'
======cut here=====
Barf

        Whee!

Yadda
======cut here=====

(the above contains three lines, no tabs, and no trailing spaces, for
a total of 27 characters)

Now do the following:

* start `emacs -q --no-site-file'

* find the file: C-x C-f /tmp/x RET

* turn on selective-display: C-u C-x $

* attempt to move point forward: C-n C-n

Note that the cursor did not appear to move after the second C-n.
That's the bug; it should have appeared on the third visible line
(right before the `Y').

* sanity check: C-x =

You should see point 6 of 27.

* again attempt to move point forward: C-n

* again sanity check: C-x =

It's still at 6 of 27.

If it matters, you can "un-stick" point by typing C-f, *then* typing
C-n; in that case, point indeed winds up on the third visible line,
where I'd expect it to.

In GNU Emacs 21.3.50.68 (i686-pc-linux-gnu, GTK+ Version 2.2.4)
 of 2004-02-24 on debian
configured using `configure '--with-gtk'
'--prefix=/usr/local/stow/emacs-cvs' 'CFLAGS=-g -O0''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: Fundamental

Minor modes in effect:
  menu-bar-mode: t
  unify-8859-on-encoding-mode: t
  line-number-mode: t

Recent input:
r i TAB r e g TAB RET / t m p / x RET C-x C-f ESC p 
RET C-u C-x $ C-n C-n C-n C-n C-x $ ESC > RET Y a d 
d a RET C-x C-s C-u C-x $ ESC < C-n C-n C-n C-n C-n 
C-p C-x $ C-k C-x C-o C-x C-s C-u C-x $ C-n C-n C-n 
C-x $ C-n ESC f ESC b C-k W h e e ! C-x C-s C-u C-x 
$ ESC < C-n C-n C-n C-x $ ESC < ESC x r e p o r TAB 
RET

Recent messages:
selective-display set to nil.
Wrote /tmp/x
selective-display set to 4.
selective-display set to nil.
Wrote /tmp/x
selective-display set to 4.
Mark set
selective-display set to nil.
Mark set
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