bug#14598: bug#14567: These changes sometimes break plain text navigation

[Eli Zaretskii]

> From: Dima Kogan <dima@secretsauce.net>
> Date: Mon, 08 Jul 2013 16:42:49 -0700
> 
> I did a search for similar-sounding existing bugs, and apparently this
> issue has already been filed, so I didn't add to the pile:
> 
>  http://debbugs.gnu.org/6103
>  http://debbugs.gnu.org/6272
>  http://debbugs.gnu.org/14598

None of these are reproducible with the current trunk, so I guess my
latest changes fixed them all indirectly.  I'm closing them.

> My main test case now works perfectly. I can still make problems
> happen if I adjust the text size with C-x C-+.

I can't.  So please file a new bug report ;-)

> Loading emacs with the .emacs I mentioned in the original post about
> this and then pressing 'C-x C-+' 4 times, pressing C-n never results in
> a 50% screen scroll. At the bottom, C-n presses alternate between
> 
>  - scrolling down one line while keeping the point stationary

Stationary on screen, or stationary at the same buffer position?

>  - moving the point down one line normally.

What do the following report in each one of the 2 above-mentioned
situations, i.e. before C-n would scroll, and before it would move?

  M-: (pos-visible-in-window-p t nil t) RET
  M-: (posn-at-point) RET
  M-: (default-font-height) RET

> This sounds like http://debbugs.gnu.org/14598

No, it isn't, as that bug is already solved.  I guess it was easier
than I thought at the time.