--- a/mercurial/context.py	Wed Aug 17 13:25:13 2016 -0700
+++ b/mercurial/context.py	Wed Aug 17 13:25:13 2016 -0700
@@ -528,7 +528,7 @@
 
     @propertycache
     def _manifest(self):
-        return self._repo.manifest.read(self._changeset.manifest)
+        return self._repo.manifestlog[self._changeset.manifest]
 
     @propertycache
     def _manifestdelta(self):