Wrong type argument: number-or-marker-p, nil when calling outshine-cycle-buffer on a headline

[cyrus-and]

The issue

outshine-cycle-buffer (bound by default to <M-TAB>) doesn't work when the point is on headings.

How to reproduce

1. Create and open the following outshine-issue.el file:

   ;;; Foo
   
   ;; Local Variables:
   ;; eval: (outshine-mode)
   ;; End:

2. Move the point to the line where Foo is (anywhere but column 0, it works there);

3. Press <M-tab> or M-x outshine-cycle-buffer.

At this point the error is triggered and the visibility is not cycled:

 Wrong type argument: number-or-marker-p, nil

Versions

• Debian GNU/Linux 10
• GNU Emacs 26.1
• outshine version 20190313.1153 (from MELPA);

[thblt]

Thanks for your report, please pull HEAD and confirm the issue is solved, reopen if not. You may also wait until Melpa distributes 4c6107da8fd6119ba1b2379cd2f68c8c7374e8d5, in a few hours.

[cyrus-and]

Awesome! Thanks for the immediate fix, I can confirm that the problem is now solved.