bug#24692: 25.1; simple, reproducible Emacs 25.1 crash on MS Windows

[Drew Adams]

> A simple recipe would be to run
> 
> (defun foo ()
>    ""
>    (interactive)
>    (let ((max-win-width  0)
>          (max-win-height 1))
>      (save-excursion
>        (goto-char (point-min))
>        (while (not (eobp))
>          (end-of-line)
>          (setq max-win-width  (max (current-column) max-win-width))
>          (when (zerop (forward-line 1))
>            (setq max-win-height  (1+ max-win-height)))))
>      (cons max-win-width max-win-height)))
> 
> on simple.el.  Does that crash?

Yes.

With emacs -Q, I visit simple.el and M-x foo crashes.