From ff0c16a04245baf94b7bdfda65a476a556a0e7b2 Mon Sep 17 00:00:00 2001
From: SwimmingTiger <hu60.cn@gmail.com>
Date: Tue, 15 Jan 2019 18:06:45 +0800
Subject: [PATCH] fix sserver crash when received a ExMessage before
 dispatcher_ inited.

---
 src/StratumSession.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/StratumSession.cc b/src/StratumSession.cc
index b477d3e36..85045675d 100644
--- a/src/StratumSession.cc
+++ b/src/StratumSession.cc
@@ -120,7 +120,9 @@ bool StratumSession::handleMessage() {
     string exMessage;
     exMessage.resize(len);
     evbuffer_remove(buffer_, &exMessage.front(), exMessage.size());
-    dispatcher_->handleExMessage(exMessage);
+    if (dispatcher_) {
+      dispatcher_->handleExMessage(exMessage);
+    }
     return true;  // read message success, return true
   }