Ensure that non-QRESYNC nnimap can proceed after a QRESYNC fail

* lisp/gnus/nnimap.el (nnimap-update-info): If we don't have a
start-article in the non-QRESYNC case, then the start has to be 1
(bug#23241).

1 files changed, 2 insertions, 0 deletions

diff --git a/lisp/gnus/nnimap.el b/lisp/gnus/nnimap.el
index ffe1a47e932..a884376efb6 100644
--- a/lisp/gnus/nnimap.el
+++ b/lisp/gnus/nnimap.el
@@ -1544,6 +1544,8 @@ If LIMIT, first try to limit the search to the N last articles."
                info existing (nnimap-imap-ranges-to-gnus-ranges vanished) flags)
             ;; Do normal non-QRESYNC flag updates.
             ;; Update the list of read articles.
+            (unless start-article
+              (setq start-article 1))
             (let* ((unread
                     (gnus-compress-sequence
                      (gnus-set-difference