updated for version 7.4.289
Problem:    Pattern with repeated backreference does not match with new regexp
            engine. (Urtica Dioica)
Solution:   Also check the end of a submatch when deciding to put a state in
            the state list.
diff --git a/src/testdir/test64.ok b/src/testdir/test64.ok
index a1498ea..9fb6c60 100644
--- a/src/testdir/test64.ok
+++ b/src/testdir/test64.ok
@@ -947,6 +947,9 @@
 OK 0 - ^\(a*\)\1$
 OK 1 - ^\(a*\)\1$
 OK 2 - ^\(a*\)\1$
+OK 0 - ^\(a\{-2,}\)\1\+$
+OK 1 - ^\(a\{-2,}\)\1\+$
+OK 2 - ^\(a\{-2,}\)\1\+$
 OK 0 - <\@<=span.
 OK 1 - <\@<=span.
 OK 2 - <\@<=span.