--- a/mercurial/subrepo.py	Fri Oct 03 09:29:48 2014 -0700
+++ b/mercurial/subrepo.py	Sat Oct 11 22:43:14 2014 -0700
@@ -1582,7 +1582,7 @@
             elif status == 'D':
                 removed.append(f)
 
-        deleted = unknown = ignored = clean = []
+        deleted, unknown, ignored, clean = [], [], [], []
         return scmutil.status(modified, added, removed, deleted,
                               unknown, ignored, clean)