(c-initialize-builtin-style):

Only use copy-tree if it is
funcall-able.  This is the right patch, and was given by Erik Naggum
<erik@naggum.no>

1 files changed, 3 insertions, 2 deletions

diff --git a/lisp/progmodes/cc-styles.el b/lisp/progmodes/cc-styles.el
index 4adb0ac3870..bbdcdcb8ce2 100644
--- a/lisp/progmodes/cc-styles.el
+++ b/lisp/progmodes/cc-styles.el
@@ -7,7 +7,7 @@
 ;;             1985 Richard M. Stallman
 ;; Maintainer: cc-mode-help@python.org
 ;; Created:    22-Apr-1997 (split from cc-mode.el)
-;; Version:    5.18
+;; Version:    See cc-mode.el
 ;; Keywords:   c languages oop
 
 ;; This file is part of GNU Emacs.
@@ -572,7 +572,8 @@ offset for that syntactic element.  Optional ADD says to add SYMBOL to
   (or (assoc "cc-mode" c-style-alist)
       (let (copyfunc)
         ;; use built-in copy-tree if its there.
-        (if (fboundp 'copy-tree)
+        (if (and (fboundp 'copy-tree)
+                 (functionp (symbol-function 'copy-tree)))
             (setq copyfunc (symbol-function 'copy-tree))
           (setq copyfunc (lambda (tree)
                             (if (consp tree)