--- a/mercurial/dirstate.py	Mon Feb 20 17:59:48 2012 +0100
+++ b/mercurial/dirstate.py	Thu Feb 23 00:07:54 2012 +0900
@@ -110,6 +110,9 @@
                 _incdirs(dirs, f)
         return dirs
 
+    def dirs(self):
+        return self._dirs
+
     @propertycache
     def _ignore(self):
         files = [self._join('.hgignore')]