bug#38479: Org Mode is borked

[Diego Nicola Barbato]

Hi Guix,

Our Org Mode package (emacs-org) seems to be broken in a funny way.
Here's how to reproduce this bug (on commit dac7928):

1) Install ‘emacs’ and ‘emacs-org’.
2) Start Emacs and work around https://debbugs.gnu.org/38399 by adding
   the directory containing org to the front of ‘load-path’:
   --8<---------------cut here---------------start------------->8---
   (push "/path/to/org-9.2.6" load-path)
   --8<---------------cut here---------------end--------------->8---
3) Open a new org file:
   --8<---------------cut here---------------start------------->8---
   C-x C-f foo.org RET
   --8<---------------cut here---------------end--------------->8---
4) Enter the following text into the buffer:
   --8<---------------cut here---------------start------------->8---
   #+STARTUP: indent
   --8<---------------cut here---------------end--------------->8---
5) Verify you're running Org Mode version 9.2.6 by running:
   --8<---------------cut here---------------start------------->8---
   M-x org-version RET
   --8<---------------cut here---------------end--------------->8---
6) Here comes the fun part: Hit C-c C-c.  This will produce the
   following error message:
   --8<---------------cut here---------------start------------->8---
   Symbol’s function definition is void: org-outline-overlay-data
   --8<---------------cut here---------------end--------------->8---
7) Now reload Org from source (instead of the .elc files):
   --8<---------------cut here---------------start------------->8---
   C-u C-c C-x !
   --8<---------------cut here---------------end--------------->8---
6) Repeat step 6.  This time it succeeds!
   --8<---------------cut here---------------start------------->8---
   Local setup has been refreshed
   --8<---------------cut here---------------end--------------->8---

The function ‘org-outline-overlay-data’ isn't defined anywhere in the
org-9.2.6 source, but it is defined in the org bundled with Emacs.
Because of this I suspect that the new emacs-build-system generates a
weird chimera containing parts of both org-9.2.6 and org-9.1.9.

To my untrained eye this looks like it’s probably a consequence of the
aforementioned bug #38399.  So I'd expect this issue to disappear as
soon as that one is fixed.

Regards,

Diego