--- a/mercurial/upgrade.py	Mon Apr 17 13:07:22 2017 +0200
+++ b/mercurial/upgrade.py	Mon Apr 17 13:07:31 2017 +0200
@@ -147,6 +147,9 @@
     def __ne__(self, other):
         return not self == other
 
+    def __hash__(self):
+        return hash(self.name)
+
 def finddeficiencies(repo):
     """returns a list of deficiencies that the repo suffer from"""
     newreporeqs = localrepo.newreporequirements(repo)