diff -r a0674e916fb6 -r f254fc73d956 mercurial/chgserver.py
--- a/mercurial/chgserver.py	Thu Mar 03 17:39:20 2022 -0800
+++ b/mercurial/chgserver.py	Thu Mar 03 18:28:30 2022 -0800
@@ -134,7 +134,7 @@
         ignored = set()
     envitems = [
         (k, v)
-        for k, v in pycompat.iteritems(encoding.environ)
+        for k, v in encoding.environ.items()
         if _envre.match(k) and k not in ignored
     ]
     envhash = _hashlist(sorted(envitems))
@@ -320,7 +320,7 @@
 
     def __call__(self, cmd, environ, cwd=None, type=b'system', cmdtable=None):
         args = [type, cmd, util.abspath(cwd or b'.')]
-        args.extend(b'%s=%s' % (k, v) for k, v in pycompat.iteritems(environ))
+        args.extend(b'%s=%s' % (k, v) for k, v in environ.items())
         data = b'\0'.join(args)
         self.out.write(struct.pack(b'>cI', self.channel, len(data)))
         self.out.write(data)