> On 2022-07-07,, at 16:10 , Eli Zaretskii <eliz@gnu.org> wrote:
> 
>> Yes, this should test window_end_valid before using window_end_pos.
>> An alternative could be window-start point plus some estimation of the
>> window's text, perhaps?
> 
> Actually, we could be more accurate: we could use move_it_to,
> similarly to what pos_visible_p does when passed -1 as the position.

That's a possibility, indeed.