gnus fails to open specific imap server

[Colin Baxter]

I have a problem reading email via gnus on the latest emacs (git pulled
today) but which does not occur using emacs-29.3. The settings for both
versions of emacs are identical, as indeed are the versions of gnus
(5.13). Also, the problem only occurs with one particular server:
imap.yandex.com. I have other servers e.g. imap.gmx.com which function
satisfactorily.

On the latest emacs, trying to open imap.yandex.com fails with the
following error:

--8<---------------cut here---------------start------------->8---
Warning: Opening nnimap server on yandex...failed: CAPABILITY IMAP4rev1
CHILDREN UNSELECT LITERAL+ NAMESPACE XLIST UIDPLUS ENABLE ID IDLE MOVE;
Quit trying to open server nnimap+yandex; Quit trying to open server
nntp+feedbase
--8<---------------cut here---------------end--------------->8---

This problems seems to have occurred today, and as I have said, it is
absent from emacs-29.3.

Best wishes,

Colin Baxter.