diff -r 8c4906105f37 -r 0738bc25d6ac mercurial/sshpeer.py
--- a/mercurial/sshpeer.py	Mon Feb 15 13:59:36 2021 -0500
+++ b/mercurial/sshpeer.py	Mon Feb 15 14:11:38 2021 -0500
@@ -140,6 +140,10 @@
     def close(self):
         return self._main.close()
 
+    @property
+    def closed(self):
+        return self._main.closed
+
     def flush(self):
         return self._main.flush()