Make gnus-check-backend-function mode `debug-on-signal' friendly

* lisp/gnus/gnus.el (gnus-check-backend-function): Allow running
with `debug-on-signal'.

diff --git a/lisp/gnus/gnus.el b/lisp/gnus/gnus.el
index 56934dfa15d0041f26bf9ca36750a9051813e984..afe07ee46f9232da0f12784e3fd3661cc86048b5 100644 (file)
--- a/lisp/gnus/gnus.el
+++ b/lisp/gnus/gnus.el
@@ -3150,9 +3150,9 @@ g -- Group name."
   "Check whether GROUP supports function FUNC.
 GROUP can either be a string (a group name) or a select method."
   (ignore-errors
-    (let ((method (if (stringp group)
-                     (car (gnus-find-method-for-group group))
-                   group)))
+    (when-let ((method (if (stringp group)
+                          (car (gnus-find-method-for-group group))
+                        group)))
       (unless (featurep method)
        (require method))
       (fboundp (intern (format "%s-%s" method func))))))