(get-setf-method): Protect caller's match-data from string-match.

1 files changed, 2 insertions, 1 deletions

diff --git a/lisp/emacs-lisp/cl-macs.el b/lisp/emacs-lisp/cl-macs.el
index 46f8d3d5982..ba136913135 100644
--- a/lisp/emacs-lisp/cl-macs.el
+++ b/lisp/emacs-lisp/cl-macs.el
@@ -1726,7 +1726,8 @@ a macro like `setf' or `incf'."
                             method
                           (error "Setf-method for %s returns malformed method"
                                  func)))
-                   (and (string-match "\\`c[ad][ad][ad]?[ad]?r\\'" name)
+                   (and (save-match-data
+                          (string-match "\\`c[ad][ad][ad]?[ad]?r\\'" name))
                         (get-setf-method (compiler-macroexpand place)))
                    (and (eq func 'edebug-after)
                         (get-setf-method (nth (1- (length place)) place)