mercurial/unionrepo.py

--- a/mercurial/unionrepo.py	Tue Jan 12 13:10:31 2016 -0800
+++ b/mercurial/unionrepo.py	Wed Jan 13 15:47:37 2016 -0600
@@ -183,7 +183,8 @@
         """Check if a revision is censored."""
         if rev <= self.repotiprev:
             return filelog.filelog.iscensored(self, rev)
-        return self.revlog2.iscensored(rev)
+        node = self.node(rev)
+        return self.revlog2.iscensored(self.revlog2.rev(node))
 
 class unionpeer(localrepo.localpeer):
     def canpush(self):