diff --git a/mercurial/revset.py b/mercurial/revset.py
--- a/mercurial/revset.py
+++ b/mercurial/revset.py
@@ -631,13 +631,11 @@
     in the repo (whereas we want "::x *and* ::y").
 
     """
-    # only wants the heads of the set passed in
-    h = heads(repo, fullreposet(repo), x, anyorder)
-    if not h:
+    startrevs = getset(repo, fullreposet(repo), x, order=anyorder)
+    if not startrevs:
         return baseset()
-    for r in h:
+    for r in startrevs:
         subset &= dagop.revancestors(repo, baseset([r]))
-
     return subset
 
 @predicate('contains(pattern)', weight=100)
diff --git a/tests/test-revset.t b/tests/test-revset.t
--- a/tests/test-revset.t
+++ b/tests/test-revset.t
@@ -1069,7 +1069,6 @@
   2
   4
   8
-  9
 
 test ancestor variants of empty revision