GNU bug report logs - #6264
23; scrolling up erratic when line fractions visible at bottom of window

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Message #8 received at 6264 <at> debbugs.gnu.org (full text, mbox):

From: Alan Third <alan <at> idiocy.org>
To: David Reitter <david.reitter <at> gmail.com>
Cc: 6264 <at> debbugs.gnu.org
Subject: Re: bug#6264: 23;
 scrolling up erratic when line fractions visible at bottom of window
Date: Thu, 29 Sep 2016 23:23:34 +0100

David Reitter <david.reitter <at> gmail.com> writes:

> Moving down in a buffer does not work well at all when the last line
> in the window is not fully visible.
>
> The problem occurs in a wide variety of conditions, but here is a test
> case that works for me:
>
> Emacs -Q  [23 branch build, NS port]
> (setq scroll-conservatively 100)
> (setq line-spacing 0.6)
> (modify-frame-parameters nil '((height . 20)))
>
> Insert some 40 lines of text into the buffer.
>
> Now set point somewhere near the beginning of the buffer, and press
> <down> repeatedly to scroll the buffer.
>
> You will see at some point that the text is scrolled up by more than
> one line so the cursor moves vertically up and down. Screenshots
> down-0 and down-1 illustrate this.

Hi David, I can't reproduce this in Emacs 25, so hopefully it's been
fixed some time in the last six years.

As always, I'll close in a few days if I don't hear otherwise.
-- 
Alan Third

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