diff -r bce5ebe72859 -r b647b923486f mercurial/localrepo.py
--- a/mercurial/localrepo.py	Mon May 22 19:18:12 2017 -0400
+++ b/mercurial/localrepo.py	Thu May 25 01:45:52 2017 +0200
@@ -1120,6 +1120,7 @@
     def undofiles(self):
         return [(vfs, undoname(x)) for vfs, x in self._journalfiles()]
 
+    @unfilteredmethod
     def _writejournal(self, desc):
         self.dirstate.savebackup(None, prefix='journal.')
         self.vfs.write("journal.branch",