Fix last change.

* emacs-lisp/lisp-mode.el (lisp-current-defun-name):
* progmodes/m4-mode.el (m4-current-defun-name):
* progmodes/perl-mode.el (perl-current-defun-name):
* textmodes/tex-mode.el (tex-current-defun-name):
* textmodes/texinfo.el (texinfo-current-defun-name): Use save-excursion.

lisp/emacs-lisp/lisp-mode.el

@@ -240,28 +240,29 @@ font-lock keywords will not be case sensitive."
 
 (defun lisp-current-defun-name ()
   "Return the name of the defun at point, or nil."
-  (let ((location (point)))
-    ;; If we are now precisely at the beginning of a defun, make sure
-    ;; beginning-of-defun finds that one rather than the previous one.
-    (or (eobp) (forward-char 1))
-    (beginning-of-defun)
-    ;; Make sure we are really inside the defun found, not after it.
-    (when (and (looking-at "\\s(")
-	       (progn (end-of-defun)
-		      (< location (point)))
-	       (progn (forward-sexp -1)
-		      (>= location (point))))
-      (if (looking-at "\\s(")
-	  (forward-char 1))
-      ;; Skip the defining construct name, typically "defun" or
-      ;; "defvar".
-      (forward-sexp 1)
-      ;; The second element is usually a symbol being defined.  If it
-      ;; is not, use the first symbol in it.
-      (skip-chars-forward " \t\n'(")
-      (buffer-substring-no-properties (point)
-				      (progn (forward-sexp 1)
-					     (point))))))
+  (save-excursion
+    (let ((location (point)))
+      ;; If we are now precisely at the beginning of a defun, make sure
+      ;; beginning-of-defun finds that one rather than the previous one.
+      (or (eobp) (forward-char 1))
+      (beginning-of-defun)
+      ;; Make sure we are really inside the defun found, not after it.
+      (when (and (looking-at "\\s(")
+		 (progn (end-of-defun)
+			(< location (point)))
+		 (progn (forward-sexp -1)
+			(>= location (point))))
+	(if (looking-at "\\s(")
+	    (forward-char 1))
+	;; Skip the defining construct name, typically "defun" or
+	;; "defvar".
+	(forward-sexp 1)
+	;; The second element is usually a symbol being defined.  If it
+	;; is not, use the first symbol in it.
+	(skip-chars-forward " \t\n'(")
+	(buffer-substring-no-properties (point)
+					(progn (forward-sexp 1)
+					       (point)))))))
 
 (defvar lisp-mode-shared-map
   (let ((map (make-sparse-keymap)))

lisp/progmodes/cperl-mode.el

@@ -1745,8 +1745,9 @@ or as help on variables `cperl-tips', `cperl-problems',
   (make-local-variable 'add-log-current-defun-function)
   (setq add-log-current-defun-function
 	(lambda ()
-	  (if (re-search-backward "^sub[ \t]+\\([^({ \t\n]+\\)" nil t)
-	      (match-string-no-properties 1))))
+	  (save-excursion
+	    (if (re-search-backward "^sub[ \t]+\\([^({ \t\n]+\\)" nil t)
+		(match-string-no-properties 1)))))
 
   (make-local-variable 'paragraph-start)
   (setq paragraph-start (concat "^$\\|" page-delimiter))

lisp/progmodes/m4-mode.el

@@ -143,9 +143,10 @@
 
 (defun m4-current-defun-name ()
   "Return the name of the M4 function at point, or nil."
-  (if (re-search-backward
-       "^\\(\\(m4_\\)?define\\|A._DEFUN\\)(\\[?\\([A-Za-z0-9_]+\\)" nil t)
-      (match-string-no-properties 3)))
+  (save-excursion
+    (if (re-search-backward
+	 "^\\(\\(m4_\\)?define\\|A._DEFUN\\)(\\[?\\([A-Za-z0-9_]+\\)" nil t)
+	(match-string-no-properties 3))))
 
 ;;;###autoload
 (define-derived-mode m4-mode prog-mode "m4"

lisp/progmodes/perl-mode.el

@@ -581,8 +581,10 @@ create a new comment."
 
 (defun perl-current-defun-name ()
   "The `add-log-current-defun' function in Perl mode."
-  (if (re-search-backward "^sub[ \t]+\\([^({ \t\n]+\\)" nil t)
-      (match-string-no-properties 1)))
+  (save-excursion
+    (if (re-search-backward "^sub[ \t]+\\([^({ \t\n]+\\)" nil t)
+	(match-string-no-properties 1))))
+
 
 (defvar perl-mode-hook nil
   "Normal hook to run when entering Perl mode.")

lisp/textmodes/tex-mode.el

@@ -424,13 +424,14 @@ An alternative value is \" . \", if you use a font with a narrow period."
 
 (defun tex-current-defun-name ()
   "Return the name of the TeX section/paragraph/chapter at point, or nil."
-  (when (re-search-backward
-	 "\\\\\\(sub\\)*\\(section\\|paragraph\\|chapter\\)"
-	 nil t)
-    (goto-char (match-beginning 0))
-    (buffer-substring-no-properties
-     (1+ (point))	; without initial backslash
-     (line-end-position))))
+  (save-excursion
+    (when (re-search-backward
+	   "\\\\\\(sub\\)*\\(section\\|paragraph\\|chapter\\)"
+	   nil t)
+      (goto-char (match-beginning 0))
+      (buffer-substring-no-properties
+       (1+ (point))	; without initial backslash
+       (line-end-position)))))
 
 ;;;;
 ;;;; Font-Lock support

lisp/textmodes/texinfo.el

@@ -513,8 +513,9 @@ Subexpression 1 is what goes into the corresponding `@end' statement.")
 
 (defun texinfo-current-defun-name ()
   "Return the name of the Texinfo node at point, or nil."
-  (if (re-search-backward "^@node[ \t]+\\([^,\n]+\\)" nil t)
-      (match-string-no-properties 1)))
+  (save-excursion
+    (if (re-search-backward "^@node[ \t]+\\([^,\n]+\\)" nil t)
+	(match-string-no-properties 1))))
 
 ;;; Texinfo mode