diff -r b7b8a1538161 -r d6279c43fc60 mercurial/commands.py
--- a/mercurial/commands.py	Tue Nov 03 20:18:26 2020 -0800
+++ b/mercurial/commands.py	Tue Nov 03 20:20:49 2020 -0800
@@ -6348,7 +6348,7 @@
             )
         s = wireprotoserver.sshserver(ui, repo)
         s.serve_forever()
-        sys.exit(0)
+        return
 
     service = server.createservice(ui, repo, opts)
     return server.runservice(opts, initfn=service.init, runfn=service.run)