diff -r a9fb3d598ca2 -r 970d78f3f47c mercurial/revset.py
--- a/mercurial/revset.py	Wed Oct 08 02:47:46 2014 -0700
+++ b/mercurial/revset.py	Wed Oct 08 02:48:24 2014 -0700
@@ -1015,7 +1015,7 @@
     except (TypeError, ValueError):
         # i18n: "limit" is a keyword
         raise error.ParseError(_("limit expects a number"))
-    ss = subset.set()
+    ss = subset
     os = getset(repo, spanset(repo), l[0])
     result = []
     it = iter(os)