diff -r c64f9e0beead -r a074421fa4e1 mercurial/revset.py
--- a/mercurial/revset.py	Wed Oct 08 14:03:07 2014 -0500
+++ b/mercurial/revset.py	Thu Oct 09 05:27:23 2014 -0700
@@ -2553,7 +2553,7 @@
         val2 = None
 
         choice = max
-        if self._ascending:
+        if ascending:
             choice = min
         try:
             # Consume both iterators in an ordered way until one is