--- a/mercurial/context.py	Fri Jul 25 20:11:47 2014 -0500
+++ b/mercurial/context.py	Tue Jun 17 20:26:51 2014 -0700
@@ -276,7 +276,7 @@
     def dirs(self):
         return self._dirs
 
-    def dirty(self):
+    def dirty(self, missing=False, merge=True, branch=True):
         return False
 
     def status(self, other=None, match=None, listignored=False,