#------------------------------------------------------------
#revno: 112738
#committer: Pete Beardmore <pete.beardmore@msn.com>
#branch nick: bzr
#timestamp: Thu 2013-05-30 13:29:26 +0100
#message:
#  comint: don't match an empty ignore string
=== modified file 'lisp/comint.el'
--- lisp/comint.el	2013-05-30 12:20:40 +0000
+++ lisp/comint.el	2013-05-30 12:29:26 +0000
@@ -958,7 +958,8 @@
                    (point-min)))
            (setq history (buffer-substring start end))
            (goto-char start)
-           (when (and (not (string-match ignore history))
+           (when (and (or (= (length ignore) 0)
+                          (not (string-match ignore history)))
                       (or (null ignoredups)
                           (ring-empty-p ring)
                           (not (string-equal (ring-ref ring 0)