bug#72420: set-goal-column misbehaves with a line-prefix and visual-line-mode

[Eli Zaretskii <eliz@gnu.org>]

> Cc: 72420@debbugs.gnu.org
> Date: Thu, 22 Aug 2024 17:33:16 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> 
> > Cc: 72420@debbugs.gnu.org
> > Date: Tue, 20 Aug 2024 15:24:12 +0300
> > From: Eli Zaretskii <eliz@gnu.org>
> > 
> > > From: "Martin Edström" <meedstrom@runbox.eu>
> > > Date: Tue, 20 Aug 2024 10:28:44 +0200 (CEST)
> > > 
> > > Can we undo the "notabug" tag on this one?  The bug is with visual-line-mode.
> > 
> > I didn't yet have time to take another look at this, sorry.  When I
> > do, I will consider this aspect.
> 
> I've now made this test case behave the same both with and without
> visual-line-mode on the master branch of the Emacs Git repository.
> The patch is below (you will need to rebuild Emacs for it to be
> effective, since simple.el is preloaded).
> 
> diff --git a/lisp/simple.el b/lisp/simple.el
> index a9f8b58..1d3be2b 100644
> --- a/lisp/simple.el
> +++ b/lisp/simple.el
> @@ -8200,7 +8200,7 @@ line-move-finish
>  
>  	;; Move to the desired column.
>          (if (and line-move-visual
> -                 (not (or truncate-lines truncate-partial-width-windows)))
> +                 (not (or truncate-lines (truncated-partial-width-window-p))))
>              ;; Under line-move-visual, goal-column should be
>              ;; interpreted in units of the frame's canonical character
>              ;; width, which is exactly what vertical-motion does.
> 

No further comments, so I assume the bug is indeed fixed, and I'm
closing this bug.