(which-function): Handle case when (car imenu--index-alist) is nil.

1 files changed, 3 insertions, 2 deletions

diff --git a/lisp/which-func.el b/lisp/which-func.el
index af9fc74cd82..782882d1be4 100644
--- a/lisp/which-func.el
+++ b/lisp/which-func.el
@@ -204,8 +204,9 @@ is located before first function, returns nil."
    (let ((pair (car-safe imenu--index-alist))
          (rest (cdr-safe imenu--index-alist))
          (name nil))
-     (while (and pair (or (not (number-or-marker-p (cdr pair)))
-                          (> (point) (cdr pair))))
+     (while (and (or rest pair)
+                 (or (not (number-or-marker-p (cdr pair)))
+                     (> (point) (cdr pair))))
        (setq name (car pair))
        (setq pair (car-safe rest))
        (setq rest (cdr-safe rest)))