--- a/hgext/evolve.py	Thu Nov 20 15:34:34 2014 -0800
+++ b/hgext/evolve.py	Thu Nov 20 15:49:52 2014 -0800
@@ -2776,10 +2776,10 @@
     origmarkers = repo.obsstore._all
     known = set()
     markers = []
-    for m in markers:
+    for m in origmarkers:
         if m in known:
             continue
-        know.add(m)
+        known.add(m)
         markers.append(m)
     ui.write(_('Old store is version %d, will rewrite in version %d\n') % (
         repo.obsstore._version, new_format))