From: Richard M. Stallman <rms@gnu.org>
Date: Sun, 15 Sep 1996 18:38:49 +0000 (+0000)
Subject: (tq-filter): Add unwind-protect and save-match-data.
X-Git-Tag: emacs-20.1~3741
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=14603e08e2297dfab3c32f8181b346982d291ba6;p=emacs.git

(tq-filter): Add unwind-protect and save-match-data.
---

diff --git a/lisp/emacs-lisp/tq.el b/lisp/emacs-lisp/tq.el
index 8654e76fd59..e0524bb6e19 100644
--- a/lisp/emacs-lisp/tq.el
+++ b/lisp/emacs-lisp/tq.el
@@ -87,10 +87,14 @@ that's how we tell where the answer ends."
 
 (defun tq-filter (tq string)
   "Append STRING to the TQ's buffer; then process the new data."
-  (set-buffer (tq-buffer tq))
-  (goto-char (point-max))
-  (insert string)
-  (tq-process-buffer tq))
+  (let ((old-buffer (current-buffer)))
+    (unwind-protect
+	(save-match-data
+	  (set-buffer (tq-buffer tq))
+	  (goto-char (point-max))
+	  (insert string)
+	  (tq-process-buffer tq))
+      (set-buffer old-buffer))))
 
 (defun tq-process-buffer (tq)
   "Check TQ's buffer for the regexp at the head of the queue."