Hi again,

Thanks for your answer and sorry for the duplicate.

I would be glad to help find if/where is the bug.

> Note that '(default . t) is _not_ the correct value. It should be
 '((default . t)). Just in case.

Yes indeed. I had it right in my config. I made the mistake when I copied into the email.

> I tried to set org-M-RET-may-split-line to nil first followed by setting
> it to either t or '((default . t)). For both values, I am seeing
> 
> * heading number
> * <>one
> 
> which is expected behavior.

Are you using DoomEmacs or Vanilla Emacs?

More precisely, are you using org-mode "9.6-??-e9da29b6f" as I do? (This is the only version that gives me the strange behavior)

> Please, try to reproduce starting from emacs -Q (without Doom).
> See https://orgmode.org/manual/Feedback.html

I've tried several things, but it's not very clear to me how to get/test the specific version of org-mode that is comes with doom ("9.6-??-e9da29b6f").

What I tried:

- Getting an as-vanilla-as-possible DoomInstall, by removing my config.org and sync'ing Doom. I get the same "9.6-??-e9da29b6f" org version and erroneous behavior.

- Changing the version of org-mode used in Doom, by removing the directory and installing the one from MELPA (9.5.4). This gives me the correct behavior for org-meta-return, but it breaks too many other things in org to be usable.

- Using "vanilla" "emacs -Q" and running only org "9.6".

  1. I've tried to manually load the org-version that comes with Doom, by writing & executing "(add-to-list 'load-path "/home/user/.emacs.d/modules/lang/org/lisp/autoload") (load "org")" from scratch buffer, then running org-reload
   + but I get org-version 9.3
   + and I can't find a way to edit the "load-path" "variable" to remove the native path ("/usr/share/emacs/27.1/lisp/org") from the list (sorry newbie here...)

  2. I've tried to git clone the org-mode repo in /tmp, but don't see any tag/branch that would correspond to a "9.6" version of org.
  + I do see a commit matching e9da29b6f (e9da29b6fafe63abbc2774e9d485ac13d2811b65)
    * I've tried to recover the code from this version "git checkout e9da29b6f ."
    * Compiled it (make)
    * Opened emacs -Q
    * Wrote and executed "(add-to-list 'load-path "/tmp/org-mode/lisp/") (load "org")" in the scratch buffer
    * Ran M-x org-reload
    + But "M-x org-version" still returns "Org mode version 9.5.4", and it works as expected

If you have any more hints on how I could setup an environment where I could test just org-mode "9.6-??-e9da29b6f" on a raw/vanilla emacs, I vwould be glad to test that.


Thanks in advance

-- 
Guillaume MULLER