From 5404973916dc5d0b92604d31ad7dca2358bc5b9a Mon Sep 17 00:00:00 2001
From: Lars Ingebrigtsen <larsi@gnus.org>
Date: Sun, 5 Dec 2021 02:57:43 +0100
Subject: [PATCH] Make help--describe-command more robust

* lisp/help.el (help--describe-command): `help-function' buttons
are defined in help-mode.el, so it might not exist yet when
calling `documentation' directly (bug#52291).
---
 lisp/help.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/help.el b/lisp/help.el
index adb2bd87a94..eb0a7822272 100644
--- a/lisp/help.el
+++ b/lisp/help.el
@@ -1353,7 +1353,8 @@ Return nil if the key sequence is too long."
 
 (defun help--describe-command (definition &optional translation)
   (cond ((symbolp definition)
-         (if (fboundp definition)
+         (if (and (fboundp definition)
+                  help-buffer-under-preparation)
              (insert-text-button (symbol-name definition)
                                  'type 'help-function
                                  'help-args (list definition))
-- 
2.39.5