(autoconf-current-defun-function): Copy the syntax table before modifying it.

diff --git a/lisp/progmodes/autoconf.el b/lisp/progmodes/autoconf.el
index 51e23980ff8e16ee8b04e2bbca2d2a2e34d948e2..a2a2b63a85a17306fc235ca88a3fdc6f9151c8d9 100644 (file)
--- a/lisp/progmodes/autoconf.el
+++ b/lisp/progmodes/autoconf.el
@@ -4,7 +4,7 @@
 
 ;; Author: Dave Love <fx@gnu.org>
 ;; Keywords: languages
-;; $Revision: 1.2 $
+;; $Revision: 1.3 $
 
 ;; This file is part of GNU Emacs.
 
@@ -73,7 +73,7 @@
 This version looks back for an AC_DEFINE or AC_SUBST.  It will stop
 searching backwards at another AC_... command."
   (save-excursion
-    (with-syntax-table autoconf-mode-syntax-table
+    (with-syntax-table (copy-syntax-table autoconf-mode-syntax-table)
       (modify-syntax-entry ?_ "w")
       (if (re-search-backward autoconf-definition-regexp
                              (save-excursion (beginning-of-defun) (point))