mercurial/cmdutil.py

--- a/mercurial/cmdutil.py	Tue May 26 07:44:37 2015 -0500
+++ b/mercurial/cmdutil.py	Thu May 21 14:20:24 2015 -0700
@@ -1767,8 +1767,7 @@
     if match.always():
         # No files, no patterns.  Display all revs.
         wanted = revs
-
-    if not slowpath and match.files():
+    elif not slowpath:
         # We only have to read through the filelog to find wanted revisions
 
         try: