bug#50256: thing-at-mouse

[Eli Zaretskii]

> Cc: juri@linkov.net, larsi@gnus.org, 50256@debbugs.gnu.org
> From: martin rudalics <rudalics@gmx.at>
> Date: Wed, 1 Sep 2021 16:25:20 +0200
> 
> (progn
>    (with-current-buffer "*Messages*"
>      (goto-char (point-min)))
>    (pop-to-buffer "*Messages*")
>    (with-current-buffer "*scratch*"
>      (pos-visible-in-window-p nil nil t)))
> 
> This reports visibility for the position of point in *scratch* and not
> that of the window point of the selected *Messages* window.

But you've switched to *scratch* in the selected window, so why is
that a problem?