diff -r 54817c774d38 -r 49b128e50e84 mercurial/context.py
--- a/mercurial/context.py	Mon Aug 05 18:41:56 2013 -0500
+++ b/mercurial/context.py	Mon Aug 05 18:42:41 2013 -0500
@@ -145,6 +145,9 @@
     def dirs(self):
         return self._dirs
 
+    def dirty(self):
+        return False
+
 class changectx(basectx):
     """A changecontext object makes access to data related to a particular
     changeset convenient. It represents a read-only context already presnt in
@@ -406,9 +409,6 @@
             if match.bad(fn, _('no such file in rev %s') % self) and match(fn):
                 yield fn
 
-    def dirty(self):
-        return False
-
 class filectx(object):
     """A filecontext object makes access to data related to a particular
        filerevision convenient."""