bug#23882: 25.1: loading some desktops from 24.5 results in horizontal scrollbar everywhere

[Eli Zaretskii]

> From: Nikolay Kudryavtsev <nikolay.kudryavtsev@gmail.com>
> Date: Sat, 2 Jul 2016 04:25:13 +0300
> 
> 1. Start with this init and no desktop file:
> 
> (package-initialize)
> 
> (desktop-save-mode 1)
> (setq desktop-save t
>        desktop-dirname user-emacs-directory
>        desktop-load-locked-desktop t)
> (setq initial-buffer-choice (lambda () (get-buffer-create "whatever")))
> 
> 2. Launch emacs 24.5 and exit it. This would create a desktop. I used 
> the official 24.5 build.
> 
> 3. Launch 25.1 pretest. Now there should be a horizontal scrollbar in 
> every window. Happens in 25.0.95, but also in older pretests.
> 
> Happens on Windows, I'm not sure if this is platform specific issue.

Why do you consider this a bug?  Horizontal scroll bars didn't exist
before Emacs 25.1; now they do.  So to consider this a bug, we should
establish that the scroll bars appear in buffers that don't actually
need them.  Can you point out in which buffer this happens, and why do
you think it shouldn't?