diff --git a/mercurial/repoview.py b/mercurial/repoview.py
--- a/mercurial/repoview.py
+++ b/mercurial/repoview.py
@@ -205,7 +205,7 @@
         # bypass call to changelog.method
         unfiindex = unfichangelog.index
         unfilen = len(unfiindex) - 1
-        unfinode = unfiindex[unfilen - 1][7]
+        unfinode = unfiindex[unfilen - 1].node
 
         revs = filterrevs(unfi, self.filtername)
         cl = self._clcache