org-fragtog--post-cmd: wrong-type-argument on Emacs 29

[alopezrivera]

First of all thanks for all the work put into the package. It's great :)

Describe the bug
org-fragtog-mode seems to not work on Emacs 29.

To Reproduce
Steps to reproduce the behavior:

1. Toggle buffer-wide org-latex-preview
2. M-x org-fragtog-mode
3. The following error message is shown:

   Error in post-command-hook (org-fragtog--post-cmd): (wrong-type-argument number-or-marker-p nil)
   

The bug seems to take place within org-fragtog--frag-end. Bug trace:

Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
  org-fragtog--frag-end((latex-environment (:standard-properties [724 923 nil nil 1 735 nil t nil nil nil nil element nil (section (:standard-properties [548 923 548 923 0 548 nil t nil 548 923 section element nil (headline ...) nil nil #<buffer calc.org>])) nil nil #<buffer calc.org>] :value [org-element-deferred org-element--substring (11 198) nil] :results (""))))
  org-fragtog--cursor-frag()
  org-fragtog--post-cmd()
  eval((org-fragtog--post-cmd) t)
  eval-expression((org-fragtog--post-cmd) nil nil 127)
  funcall-interactively(eval-expression (org-fragtog--post-cmd) nil nil 127)
  call-interactively(eval-expression nil nil)
  command-execute(eval-expression)

Expected behavior
org-fragtog-mode starts and inline previews of LaTeX equations work as expected.

Videos
Can provide if needed.

Version and environment

• OS: Windows Subsystem for Linux (WSL) with Ubuntu 22.04
• Emacs version: GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.33, cairo version 1.16.0)
  of 2022-07-12

Additional context
Can provide if needed.

[io12]

If you are using straight.el, I think this might be the same issue as org-roam/org-roam#2361. There are some workarounds in that thread. Can you try pinning your Org version to 8ef6205a560cd3a92f8c5f8fe34953b80121c2cb?

[alopezrivera]

That was it exactly! Thank you so much :)