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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: A scrolling problem with Emac trunk
Date: Mon, 17 Dec 2012 21:24:15 +0200
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To: Stefan Monnier <monnier@iro.umontreal.ca>
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> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Mon, 17 Dec 2012 13:02:05 -0500
> Cc: emacs <emacs-devel@gnu.org>, Angelo Graziosi <angelo.graziosi@alice.it>
> 
> >   * src/xdisp.c (display_mode_lines): Keep selected_window and selected_frame
> >   in sync.
> > Reverting this change and the subsequent
> 
> Could someone who understands the redisplay code better than I figure
> out why the above change causes those problems?

I will try.