diff -r 857591c586e0 -r 287b7da4aeaa mercurial/localrepo.py
--- a/mercurial/localrepo.py	Wed Jun 21 15:31:23 2006 -0700
+++ b/mercurial/localrepo.py	Wed Jun 21 16:20:21 2006 -0700
@@ -617,6 +617,7 @@
                     del mf[fn]
             return mf
 
+        modified, added, removed, deleted, unknown, ignored = [],[],[],[],[],[]
         compareworking = False
         if not node1 or node1 == self.dirstate.parents()[0]:
             compareworking = True