From 6243a43ac2b575435efb65d9bdbb15980ea14d78 Mon Sep 17 00:00:00 2001
From: Lars Ingebrigtsen <larsi@gnus.org>
Date: Sat, 6 Nov 2021 19:25:42 +0100
Subject: [PATCH] Fix search string generation in nnimap-make-thread-query

* lisp/gnus/nnimap.el (nnimap-make-thread-query): Remove text
properties before constructing the search string (bug#49926).
---
 lisp/gnus/nnimap.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/gnus/nnimap.el b/lisp/gnus/nnimap.el
index 059101c8907..6b627a4b756 100644
--- a/lisp/gnus/nnimap.el
+++ b/lisp/gnus/nnimap.el
@@ -2287,7 +2287,7 @@ Return the server's response to the SELECT or EXAMINE command."
 	  nnimap-incoming-split-list)))
 
 (defun nnimap-make-thread-query (header)
-  (let* ((id  (mail-header-id header))
+  (let* ((id (substring-no-properties (mail-header-id header)))
 	 (refs (split-string
 		(or (mail-header-references header)
 		    "")))
-- 
2.39.5