diff -r a0674e916fb6 -r f254fc73d956 mercurial/util.py
--- a/mercurial/util.py	Thu Mar 03 17:39:20 2022 -0800
+++ b/mercurial/util.py	Thu Mar 03 18:28:30 2022 -0800
@@ -1301,7 +1301,7 @@
         # __setitem__() isn't called as of PyPy 5.8.0
         def update(self, src, **f):
             if isinstance(src, dict):
-                src = pycompat.iteritems(src)
+                src = src.items()
             for k, v in src:
                 self[k] = v
             for k in f: