diff -r dd3bccb4b820 -r 82b82168d045 mercurial/context.py
--- a/mercurial/context.py	Wed Mar 18 09:26:26 2015 -0700
+++ b/mercurial/context.py	Wed Mar 18 11:42:09 2015 -0700
@@ -588,10 +588,6 @@
 
     def walk(self, match):
         fset = set(match.files())
-        # for dirstate.walk, files=['.'] means "walk the whole tree".
-        # follow that here, too
-        fset.discard('.')
-
         # avoid the entire walk if we're only looking for specific files
         if fset and not match.anypats():
             if util.all(fn in self for fn in fset):
@@ -606,6 +602,9 @@
                 fset.remove(fn)
             if match(fn):
                 yield fn
+        # for dirstate.walk, files=['.'] means "walk the whole tree".
+        # follow that here, too
+        fset.discard('.')
         for fn in sorted(fset):
             if not self.hasdir(fn):
                 match.bad(fn, _('no such file in rev %s') % self)