Hi,
When display-line-numbers-mode is on and the (point) is on the
beginning of line, posn-at-point returns a wrong value.
Reproducible in emacs -Q:
```
(save-excursion
(message "Without display-line-numbers:")
(display-line-numbers-mode -1)
(goto-char (line-beginning-position))
(message "column 0: %s" (car (nth 2 (posn-at-point))))
(forward-char)
(message "column 1: %s" (car (nth 2 (posn-at-point))))
(message "With display-line-numbers:")
(display-line-numbers-mode)
(goto-char (line-beginning-position))
(message "column 0: %s" (car (nth 2 (posn-at-point))))
(forward-char)
(message "column 1: %s" (car (nth 2 (posn-at-point))))
)
```
Output:
```
Without display-line-numbers:
column 0: 0
column 1: 19
With display-line-numbers:
column 0: 0
column 1: 114
```
On the bol, it returns zero but it should return (- 114 19)
In GNU Emacs 27.0.50 (build 6, x86_64-pc-linux-gnu, GTK+ Version 3.22.26)
of 2018-03-13 built on XPS13
Repository revision: ae80854e9a9f8f6733870b5b5a88467867dceb6c
Windowing system distributor 'Fedora Project', version 11.0.11906000
System Description: Fedora 27 (Twenty Seven)
Configured using:
'configure --prefix=/opt/emacs-git --with-modules --with-xwidgets
--with-imagemagick CC=clang'
--
Sebastien Chapuis