--- a/mercurial/fileset.py	Sun Oct 06 19:25:18 2019 -0400
+++ b/mercurial/fileset.py	Mon Oct 07 00:04:04 2019 -0400
@@ -629,7 +629,7 @@
 def loadpredicate(ui, extname, registrarobj):
     """Load fileset predicates from specified registrarobj
     """
-    for name, func in registrarobj._table.iteritems():
+    for name, func in pycompat.iteritems(registrarobj._table):
         symbols[name] = func