On 16/01/2023 18:10, martin rudalics wrote:
>  >> Now I'm confused.  How on earth do we scale with Lucid?
>  >
>  > Apparently, we do scale with Lucid. Even the scroll bar probably 
> (although that one is harder to tell).
> 
> Interesting.
> 
>  > x_rest.diff?
> 
> Yes.
> 
>  > It doesn't seem to make any effect on the problem behavior.
>  >
>  > Attaching *foo* after 2 evaluation, then resizing the frame with a 
> mouse, then 2 evaluations again.
> 
> My bad.  I didn't scale the text sizes when calculating the residue.
> Please try again.

Thanks, this one reminds me of some previous patch in the respective bug 
report: repeated set-frace-attribute are stable WRT the frame size, but 
resizing the frame with the mouse and then evaling the 
set-frame-attribute form resizes the frame (in the smaller direction).

foo attached.