diff -r a6543fdcf869 -r 91f3ac205816 mercurial/context.py
--- a/mercurial/context.py	Tue May 29 23:26:55 2012 +0200
+++ b/mercurial/context.py	Fri Jun 01 12:37:18 2012 -0700
@@ -223,7 +223,7 @@
         return [changectx(self._repo, x) for x in c]
 
     def ancestors(self):
-        for a in self._repo.changelog.ancestors(self._rev):
+        for a in self._repo.changelog.ancestors([self._rev]):
             yield changectx(self._repo, a)
 
     def descendants(self):
@@ -1019,7 +1019,7 @@
 
     def ancestors(self):
         for a in self._repo.changelog.ancestors(
-            *[p.rev() for p in self._parents]):
+            [p.rev() for p in self._parents]):
             yield changectx(self._repo, a)
 
     def undelete(self, list):