(isearch-repeat): Error if try to repeat search and there was no previou search.

diff --git a/lisp/isearch.el b/lisp/isearch.el
index b8103285aecbed9f8d3398b81bf8d0186b348c29..5b9fe461068f7fe2b226411224c6b3b0bd2b3000 100644 (file)
--- a/lisp/isearch.el
+++ b/lisp/isearch.el
@@ -978,7 +978,7 @@ Use `isearch-exit' to quit without signaling."
                (or (if isearch-regexp
                        (car regexp-search-ring)
                      (car search-ring))
-                   "")
+                   (error "No previous search string"))
                isearch-message
                (mapconcat 'isearch-text-char-description
                           isearch-string "")