bug#4271: 23.1; pop-to-buffer -vs- multiple terminals

[martin rudalics]

> When I ran vc-diff on this terminal, I was surprised that I was not
> switched to the *vc-diff* buffer.  It turns out that *vc-diff* was in a
> window on one of the X frames -- but not visible to me now, using the
> tty.
>
> I ran (pop-to-buffer "*vc-diff*") and this did not show the buffer.  I
> think that this should ignore frames on other terminals when determining
> whether a buffer is visible.

Could you please edebug `display-buffer' and find out how the `let' part
below gets executed in your case

     ((let ((frames (or frame
                        (and (or use-pop-up-frames
                                 display-buffer-reuse-frames
                                 (not (last-nonminibuffer-frame)))
                             0)
                        (last-nonminibuffer-frame))))
        (setq window-to-use
              (catch 'found
                ;; Search frames for a window displaying BUFFER.  Return
                ;; the selected window only if we are allowed to do so.
                (dolist (window (get-buffer-window-list buffer 'nomini frames))
                  (when (or can-use-selected-window
                            (not (eq (selected-window) window)))
                    (throw 'found window))))))

Thanks, martin.