Re: [Emacs-diffs] master bc0b340: A better fix for bug#21739

[Eli Zaretskii]

> Date: Sat, 24 Oct 2015 17:07:56 +0300
> From: Eli Zaretskii <address@hidden>
> Cc: address@hidden
> 
> > From: Stefan Monnier <address@hidden>
> > Cc: Eli Zaretskii <address@hidden>
> > Date: Sat, 24 Oct 2015 10:00:43 -0400
> > 
> > >     * src/buffer.c (set_update_modelines_for_buf): New function.
> > >     (Fkill_buffer): Use it to set the global variable
> > >     update_mode_lines if the killed buffer was displayed in some
> > >     window.  Don't set windows_or_buffers_changed.  This is a better
> > >     fix for bug#21739 than the previous fix, since it will cause only
> > >     redisplay of mode lines, not of entire windows, but will still
> > >     catch attention of x_consider_frame_title in xdisp.c, which
> > >     redraws the frame title.
> > 
> > Same question as before: why isn't this caught when the window->buffer
> > is changed?
> 
> Because changing a window's buffer only affects that single window.
> How's that code to know the frame should be affected?

I found a better way of fixing the original problem, see 7a6968b.