diff -r a0674e916fb6 -r f254fc73d956 mercurial/utils/cborutil.py
--- a/mercurial/utils/cborutil.py	Thu Mar 03 17:39:20 2022 -0800
+++ b/mercurial/utils/cborutil.py	Thu Mar 03 18:28:30 2022 -0800
@@ -174,9 +174,7 @@
     """
     yield encodelength(MAJOR_TYPE_MAP, len(d))
 
-    for key, value in sorted(
-        pycompat.iteritems(d), key=lambda x: _mixedtypesortkey(x[0])
-    ):
+    for key, value in sorted(d.items(), key=lambda x: _mixedtypesortkey(x[0])):
         for chunk in streamencode(key):
             yield chunk
         for chunk in streamencode(value):