bug#65196: 28.2; gnus-group-make-nnir-group always returns "no messages"

[Eric Abrahamsen <eric@ericabrahamsen.net>]

"Loris Bennett" <loris.bennett@fu-berlin.de> writes:

> Eli Zaretskii <eliz@gnu.org> writes:
>
>>> From: Loris Bennett <loris.bennett@fu-berlin.de>
>>> Date: Thu, 10 Aug 2023 09:48:53 +0200
>>> 
>>> 
>>> After upgrading Debian from 11 to 12, gnus-group-make-nnir-group always
>>> says that the search group contains no messages, even though there are
>>> in fact messages in the original group which contain the string searched
>>> for.
>>> 
>>> In *Messages* somethin like the following will appear:
>>> 
>>>   Opening server fu_exchange
>>>   Searching nnimap+fu_exchange:HPC...done
>>>   Group nnselect:nnselect-87jzu3z7wb.fsf contains no messages
>>> 
>>> The configuration in init.el is as follows:
>>> 
>>>   (setq user-mail-address "loris.bennett@fu-berlin.de")
>>> 
>>>   (setq message-send-mail-function 'smtpmail-send-it)
>>>   (setq smtpmail-smtp-server "mail.zedat.fu-berlin.de")
>>>   (setq smtpmail-smtp-service 587)
>>> 
>>>   (setq gnus-select-method '(nntp "news.fu-berlin.de"))
>>>   (setq gnus-secondary-select-methods
>>>         (quote
>>>          ((nnimap "fu_exchange"
>>>                   (nnir-search-engine imap)
>>>                   (remove-prefix "nnimap")
>>>                   (nnimap-address "mail.zedat.fu-berlin.de")
>>>                   (nnimap-record-commands t)
>>>                   (nnimap-inbox INBOX)
>>>                   (gnus-message-archive-group "nnimap+fu_exchange:Gesendete Elemente")))))
>>> 
>>> The same problem occurs with nntp groups (not configured in this test).
>>> 
>>> Unfortunately that is all the information I can provide, although I can
>>> see that it is probably insufficient to identify the problem.
>>
>> Andrew, any comments?  Is this perhaps already fixed in Emacs 29?
>
> Further investigation reveal that this is not a general issue, but is
> related to the specific select methods.
>
> For my work setup I actually have, in addition to the settings above
>
>   (nntp "fu_news"
>         (nntp-address "news.fu-berlin.de")
> 	(remove-prefix nntp)
> 	(gnus-message-archive-group "nnimap+fu_exchange:Gesendete Elemente"))) 
>
> Searching in newgroups subscribe to via the above also always returns no
> messages.
>
> However, in my private setup I have various email providers, such as GMX:
>
>          (nnimap "gmx"
>                   (nnimap-stream tls)
>                   (remove-prefix "nnimap.")
>                   (nnimap-record-commands t)
>                   (nnimap-address "imap.gmx.com"))
>   
> If I add this to my work setup, search results within folders in the GMX
> account *do* produce results.  Searching within the Exchange folder or the
> NNTP groups still fails. 
>
> Is there anything I can do to help debug the problem?

For the exchange server, you should just remove the `nnir-search-engine`
setting from the definition, it should work find by default.

I don't believe search works for nntp at all -- did it used to?