From 3f70ec6f8ad9701ee69b9541efd31d600535f069 Mon Sep 17 00:00:00 2001
From: iamqizhao <toqizhao@gmail.com>
Date: Mon, 10 Aug 2015 18:26:03 -0700
Subject: [PATCH] fix a race

---
 transport/http2_client.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/transport/http2_client.go b/transport/http2_client.go
index 0986ef01..41e2069e 100644
--- a/transport/http2_client.go
+++ b/transport/http2_client.go
@@ -266,6 +266,10 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
 		return nil, err
 	}
 	t.mu.Lock()
+	if t.state != reachable {
+		t.mu.Unlock()
+		return nil, ErrConnClosing
+	}
 	s := t.newStream(ctx, callHdr)
 	t.activeStreams[s.id] = s
 	t.mu.Unlock()