From: Alan Mackenzie <acm@muc.de>
Date: Mon, 23 Nov 2015 17:13:55 +0000 (+0000)
Subject: Signal an error when `setf' gets an odd number of arguments.
X-Git-Tag: emacs-25.0.90~682
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=b6bc4ab20cb62edc4ab6dac00918f81781ba1925;p=emacs.git

Signal an error when `setf' gets an odd number of arguments.

* lisp/emacs-lisp/gv.el (setf): Amend.
---

diff --git a/lisp/emacs-lisp/gv.el b/lisp/emacs-lisp/gv.el
index 9e00190e000..1fea38c49c1 100644
--- a/lisp/emacs-lisp/gv.el
+++ b/lisp/emacs-lisp/gv.el
@@ -260,6 +260,8 @@ The return value is the last VAL in the list.
 
 \(fn PLACE VAL PLACE VAL ...)"
   (declare (debug (&rest [gv-place form])))
+  (if (/= (logand (length args) 1) 0)
+      (signal 'wrong-number-of-arguments (list 'setf (length args))))
   (if (and args (null (cddr args)))
       (let ((place (pop args))
             (val (car args)))