bug#22637: 25.1.50; `mode-line` face `:height` incompatible with `scroll-conservatively 101`.

[Eli Zaretskii]

> Date:  Fri, 12 Feb 2016 08:17:53 -0800
> From:  Keith David Bershatsky <esq@lawlist.com>
> Cc:  22637@debbugs.gnu.org
> 
> Thank you, Eli, for the explanation regarding how to better interpret the 
> GLYPH_DEBUG messages that I was seeing on stderr.
> 
> I was able to reproduce problem 22637 on Emacs for Windows (XP) master branch 
> with the following code starting from Emacs -Q, evaluating the following code 
> in the scratch buffer, and then pressing the F1 key a couple of times.  The 
> last line will remain below the bottom of the visible window each time the F1 
> key is pressed.  On Windows, a height of 120 seems to work better for 
> purposes of reproducing the problem, whereas on OSX I was using a height of 
> 140.
> 
> (face-spec-set 'mode-line
>   '((((class color) (min-colors 88))
>      :box (:line-width -1 :style released-button)
>      :background "grey75" :foreground "black" :height 120)
>     (t
>      :inverse-video t)))
> 
> (setq scroll-conservatively 101)
> 
> (global-eldoc-mode -1)
> 
> (global-font-lock-mode -1)
> 
> (blink-cursor-mode -1)
> 
> (defun my-insert-text ()
> (interactive)
>   (dotimes (i 200)
>     (insert "I will not obey absurd orders.\n")))
> 
> (global-set-key [f1] 'my-insert-text)

Thanks.  This is now fixed on the emacs-25 branch.