bug#42039: 27.0.91; (posn-x-y (posn-at-point)) inconsistent with display-line-numbers-mode

[Dmitry Gutov]

On 26.06.2020 15:04, Eli Zaretskii wrote:
> > From: Dmitry Gutov <dgutov@yandex.ru>
> > Date: Thu, 25 Jun 2020 16:29:21 +0300
> >
> > 1. Enable display-line-numbers-mode.
> > 2. Move point to the beginning of some line.
> > 3. Evaluate (posn-x-y (posn-at-point))
> >
> > => The value in CAR will be > 0 (to account for the columns taken by
> > d-l-n-m).
> >
> > 4. Do the same thing on a line that belongs to an overlay. For example,
> > the overlay in the bug reporting buffer (move point to the line with
> > "This bug report...").
> > 5. The return value will be like (0 . 180).
> >
> > The expected behavior: the column should still account for the offset by
> > the d-l-n-m.
> >
> > I'd really like to see this fixed in Emacs, it makes positioning of
> > popups unpredictable when display-line-numbers-mode is enabled:
> > https://github.com/company-mode/company-quickhelp/issues/106
>
> Your wish has been granted: this should now be fixed on the emacs-27
> branch.

Thank you.

It's working fine now in the cases I really care about (so we can close 
the report), but here's one you seem to have missed:

1. M-x report-emacs-bug.
2. Toggle display-line-numbers-mode on.
3. Move point to the second display string ("If Emacs crashed...").
4. Evaluate (posn-x-y (posn-at-point)).