Remember to cover the basics, that is, what you expected to happen and what in fact did happen. You don't know how to make a good report? See
https://orgmode.org/manual/Feedback.html#Feedback Your bug report will be posted to the Org mailing list. ------------------------------------------------------------------------ Consider the following snippet of org - First item. I'm just writing something longer so that the minimum number of characters is reached. Anywhere on the second line, calls to org-list-struct fail with the error: "Wrong type argument: number-or-marker-p, nil". The following numerical comparison fails in org-list-struct because itm-lst-s is nil: (when (<= ind (nth 1 (car itm-lst-2))) (push (cons ind (point)) end-lst-2)) I stumbled upon this because it essentially renders package guess-language unsusable in most of my org files. Related bug: https://github.com/tmalsburg/guess-language.el/issues/20 Emacs : GNU Emacs 26.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30) of 2018-09-11 Package: Org mode version 9.1.14 (9.1.14-1-g4931fc-elpaplus @ /home/emilio/.emacs.d/elpa/org-plus-contrib-20180910/)