org-element--cache: Added org-data parent to non-headline element

[martyhiatt@riseup.net]

hi org-mode,

i'm encountering an error repeatedly in my work. (i know elisp but not org well, i also don't know how to report bugs, so apologies if i'm doing it wrong.

how i encounter it:

- working in an org file, i call clone-indirect-buffer-other-window.
- i narrow parent buffer to a subtree, and cloned buffer i open in another frame
- in cloned buffer, i move some headings or list items around, and at some point the org parsing breaks. so eg if i move a heading, it doesn't correctly calculate the end of the subtree but moves part of the next subtree with it (it splits it in the middle for example).

- i get an warning like so:

#+begin_example
⛔ Warning (org-element): org-element--cache: Added org-data parent to non-headline element: (item (:standard-properties [22226 22226 22232 22238 22238 0 (:tag) item element t (61 . 22226) nil nil nil #<buffer my-org-file.org> nil ((22225 0 "- " nil "[ ]" nil 22237) (22237 0 "- " nil "[X]" nil 22251) (22251 0 "- " nil "[ ]" nil 22273) (22273 0 "- " nil "[ ]" nil 22285) (22285 0 "- " nil "[ ]" nil 22317) (22317 0 "- " nil "[ ]" nil 22344) (22344 0 "- " nil "[X]" nil 22366)) (headline (:standard-properties [22195 22195 22221 22367 22367 0 (:title) nil element nil (61 . 22194) 22223 22367 1 #<buffer my-org-file.org> [org-element-deferred org-element--headline-deferred nil t] nil (org-data (:standard-properties [1 1 2 95144 95144 0 nil org-data nil t nil 4 95144 nil #<buffer my-org-file.org> [org-element-deferred org-element--get-global-node-properties nil t] nil nil] :path "/path/to/my-org-file.org" :fragile-cache nil))] :pre-blank 0 :raw-value [org-element-deferred org-element--headline-raw-value (0 0) nil] :title [org-element-deferred org-element-property-2 (:raw-value) nil] :level 0 :priority nil :tags nil :todo-keyword nil :todo-type nil :footnote-section-p [org-element-deferred org-element--headline-footnote-section-p nil nil] :archivedp [org-element-deferred org-element--headline-archivedp nil nil] :commentedp nil :fragile-cache nil))] :bullet "- " :checkbox off :counter nil :pre-blank 0 :tag nil))
If this warning appears regularly, please report the warning text to Org mode mailing list (M-x org-submit-bug-report).
#+end_example

- i think the actual parsing mess ups vary, sometimes the paragraph indent will be lost, or rich text markup doesn't work properly any more, but i figure they're all derivative of the same error.

- i have to restart the file to continue working.

- i tried it also in emacs -q, same file, same cloning/narrowing, and i got a different error:

#+begin_example
Warning (org-element-cache): org-element--cache: Org parser error in my-org-file.org<2>::2131. Resetting.
The error was: (wrong-type-argument integer-or-marker-p nil)
Backtrace:
nil
Please report this to Org mode mailing list (M-x org-submit-bug-report).
#+end_example

i'm running emacs 30.0.50, gtk, cairo, daemon mode.
i'm running org 9.7-pre, installed via straight/use-package

NB: when i run in emacs -q, it runs emacs built-in version, 9.6.9.
would it be helpful to try to reproduce with emacs -q plus my own org config (it's a lot)?

i'm currently not able to upgrade to next org version as i don't want my config to break while working on this project.

thanks,
marty