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bug#6264: 23; scrolling up erratic when line fractions visible at bottom


From: Alan Third
Subject: bug#6264: 23; scrolling up erratic when line fractions visible at bottom of window
Date: Thu, 29 Sep 2016 23:23:34 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1 (darwin)

David Reitter <address@hidden> 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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