bug#14408: 24.3.50; *Messages* buffer no longer updates automatically

[Eli Zaretskii]

> Date: Thu, 16 May 2013 11:37:51 -0400
> From: Barry OReilly <gundaetiapo@gmail.com>
> 
> Git bisected the Emacs repo at Savannah to:
> 
> 046fb9fbdc0ee0c26e0063ce5ee94bead46ee98d is the first bad commit
> commit 046fb9fbdc0ee0c26e0063ce5ee94bead46ee98d
> Author: Dmitry Antipov <dmantipov@yandex.ru>
> Date:   Tue Dec 11 13:51:12 2012 +0400
> 
>     * buffer.c (Fset_buffer_multibyte): Do not force redisplay
>     if changed buffer is not shown in a window.
>     * insdel.c (prepare_to_modify_buffer): Likewise.
>     * window.c (replace_buffer_in_windows_safely): Do nothing
>     if buffer is not shown in a window.
>     (Fforce_window_update): Likewise if string or buffer argument
>     is passed.

Could you show a precise recipe for reproducing this, starting with
"emacs -Q"?  I tried to reproduce with today's trunk, but couldn't.
Perhaps I don't understand what you mean by "side by side" or don't
invoke eval-last-sexp as you do.

Does the problem depend on the frame/window size?  Does it appear in
"emacs -nw" as well as in GUI sessions?  And what OS is that?

Thanks.