bug#38452: 26.3; set-frame-position is slightly drifted

[martin rudalics]

> I noticed a strange behaviour with the function set-frame-position.
> This happens even when starting from `emacs -q --no-site-file`
>
> If I evaluate  the following expression:
>
> (let ((x (frame-parameter nil 'left))
>        (y (frame-parameter nil 'top)))
>    (set-frame-position nil x y))
>
> ( by  C-X C-E in the file or with M-: )
>
> the behaviour that I expect would be  that the frame stays still since I use
> the original left and top position to reset the position.
> However the frame is slightly drifted by 10 pixel to the left and 8
> pixels to the top.
> If I repeat the evaluation of the expression the frame keeps moving.
>
> More generally (set-frame-position ...) seems to be off by (-10,-8).

Does

(set-frame-position nil 0 0)

work "as intended" for you?  Also when evaluated two or more times in
succession?

martin