bug#50256: thing-at-mouse

[Eli Zaretskii]

> Cc: larsi@gnus.org, juri@linkov.net, 50256@debbugs.gnu.org
> From: martin rudalics <rudalics@gmx.at>
> Date: Thu, 2 Sep 2021 14:42:15 +0200
> 
>  >> pos_visible_p already does
>  >>
>  >>     if (XBUFFER (w->contents) != current_buffer)
>  >>       {
>  >>         old_buffer = current_buffer;
>  >>         set_buffer_internal_1 (XBUFFER (w->contents));
>  >>       }
>  >
>  > I'm asking if this is the desired behavior, when Lisp runs this inside
>  > with-current-buffer?
> 
> It is the _necessary_ behavior when WINDOW is not the selected window
> and its buffer is not current.

But in the case in point, WINDOWS _was_ the selected window.  That's
why pos-visible-in-window-p used PT.  Which is what you said was the
bug.  Or am I missing something?