master 5404973 2/2: Make help--describe-command more robust

[Lars Ingebrigtsen]

branch: master
commit 5404973916dc5d0b92604d31ad7dca2358bc5b9a
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    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 adb2bd8..eb0a782 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))