From 9fcc3287975592d83269baeb6239fda39851daa0 Mon Sep 17 00:00:00 2001
From: Qian Wang <cbeuw.andy@gmail.com>
Date: Mon, 5 Aug 2019 13:17:02 +0100
Subject: [PATCH] Fix a mutex deadlock

---
 internal/multiplex/switchboard.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/internal/multiplex/switchboard.go b/internal/multiplex/switchboard.go
index dbf5f2c..d43720a 100644
--- a/internal/multiplex/switchboard.go
+++ b/internal/multiplex/switchboard.go
@@ -106,7 +106,9 @@ func (sb *switchboard) removeConn(closing *connEnclave) {
 	}
 	if len(sb.ces) == 0 {
 		sb.session.SetTerminalMsg("no underlying connection left")
+		sb.cesM.Unlock()
 		sb.session.Close()
+		return
 	}
 	sb.cesM.Unlock()
 }