From 7c8a4fc03f4d0aa337e9f8c94fd457af2e65dd4d Mon Sep 17 00:00:00 2001
From: XieHan <XieHan@sogou-inc.com>
Date: Wed, 16 Dec 2020 20:45:21 +0800
Subject: [PATCH] make it safe

---
 src/factory/WFTaskFactory.inl | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/factory/WFTaskFactory.inl b/src/factory/WFTaskFactory.inl
index ba014657..07dc931f 100644
--- a/src/factory/WFTaskFactory.inl
+++ b/src/factory/WFTaskFactory.inl
@@ -692,7 +692,12 @@ SubTask *WFComplexClientTask<REQ, RESP, CTX>::done()
 		}
 		else if (this->state == WFT_STATE_SYS_ERROR)
 		{
-			RouteManager::notify_unavailable(route_result_.cookie, this->target);
+			if (this->target)
+			{
+				RouteManager::notify_unavailable(route_result_.cookie,
+												 this->target);
+			}
+
 			UpstreamManager::notify_unavailable(upstream_result_.cookie);
 			// 5. complex task failed: retry
 			if (retry_times_ < retry_max_)