bug#59882: Multiple versions of Org in load-path problem

[Gregor Zattler <telegraph@gmx.net>]

Hi Tim, org-mode and emacs developers,
* Tim Cross <theophilusx@gmail.com> [2023-02-04; 07:01 +11]:
> Ihor Radchenko <yantar92@posteo.net> writes:
>> Max Nikulin <manikulin@gmail.com> writes:
>>> On 27/12/2022 16:47, Ihor Radchenko wrote:
>>>> Can you then try to test using Emacs 28?
>>>> The main question if whether this has been fixed in newer Emacs releases
>>>> or it is also something to do with OS environment.
>>> I see quite the same issue with Emacs-28.2 in Debian testing. Compile
>>> buffer displays a bit more warnings and usual `org-assert-version'
>>> warnings and errors are present as well. It might have another level of
>>> complexity due to .eln files. I am unsure what happens with calls to
>>> undefined macros.
>>
>> I asked people around to test using Debian, and we do have a
>> confirmation that Debian + Emacs 27 and Debian + Emacs 28 do trigger the
>> error.
>>
>> I also installed Debian 11.6.0 on virtual machine, and I was also able to
>> trigger the error, following the provided steps, using the Emacs 27
>> installed via apt-get.
>>
>> The problem seems to be real and appears to be some combination of
>> Debian/Ubuntu + Emacs.
>>
>> Considering the popularity of Debian-based distros, may someone take a
>> closer look on what may be going on? Since the latest Emacs release also
>> suffers from the problem, I am afraid that the issue will be present in
>> the coming Emacs 29 as well (I recall no related fixes in recent Emacs).
>
> I don't run Debian or Ubuntu anymore. However, I do recall that debian
> does use a modified Emacs startup which is not part of the standard
> Emacs distribution. They do this to enable the ability to have multiple
> versions of Emacs installed at the same time.

that would be /usr/share/emacs/site-lisp/debian-startup.el


Ciao; Gregor
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