Re: "spurious scrolling bug"

[Chong Yidong <cyd@stupidchicken.com>]

Richard Stallman <rms@gnu.org> writes:

> I think someone sent a bug report about spurious scrolling (when
> scrolling should not occur), during the past few weeks.  I do not know
> how to find that message, though.  I searched my outgoing mail to
> emacs-devel, and it seems I did not send a response to it there.
> Maybe it was sent to emacs-pretest-bug.

You probably mean this thread, which is (apparently) unrelated to the
current bug:

From: Warren L Dodge <warrend@mdhost.cse.tek.com>
Subject: Re: C-a acts different in 22.0.90 then past versions
To: storm@cua.dk (Kim F. Storm)
Cc: emacs-pretest-bug@gnu.org, warren.l.dodge@tektronix.com

  I'll try emacs-22.0.96 as soon as I can get it built. In the mean time here
  is the answers to all the other questions.

  emacs-22.0.90 -Q
  c-xc-f /etc/termcap 

  c-xc-q     To make it writable
  c-kc-kc-y  kill the first line and put it back. 
             It will not do it without this line kill

  c-s the    do this until you leave the first screen displayed. This will
             recenter the buffer on the "the" found. Then c-s for one more
             "the" below but on the same display screen. For the GNU/Linux on
             the redhat 4.0 release it was about 16 additional c-s commands to
             get it. I think near the bottom will work also. 

  c-a        this will recent the screen on the line where the "the" was at.


From: Richard Stallman <rms@gnu.org>
Subject: Re: C-a acts different in 22.0.90 then past versions
Newsgroups: gmane.emacs.pretest.bugs
To: Chong Yidong <cyd@stupidchicken.com>
Cc: emacs-pretest-bug@gnu.org

    > Aha, I could reproduce this reliably with a June 20th version of CVS
    > as well.  However, I cannot reproduce it using the latest version in
    > CVS, following the exact same steps.  I guess this bug has already
    > been solved.

    The problem shows up in 22.0.90, but is solved in 22.0.96.

  I believe this is a bug I fixed.  I think the fix was in isearch.el,
  though that part of the memory is not clear.

  However, I still get spurious undesirable scrolling once in a while,
  not associated with isearch.  I don't know what causes that.