asio: Set stream pointer to request and response in stream ctor

src/asio_client_session_impl.cc

@@ -355,12 +355,7 @@ stream *session_impl::create_push_stream(int32_t stream_id) {
 }
 
 std::unique_ptr<stream> session_impl::create_stream() {
-  auto strm = make_unique<stream>(this);
-
-  auto &req = strm->request().impl();
-  req.stream(strm.get());
-
-  return strm;
+  return make_unique<stream>(this);
 }
 
 const request *session_impl::submit(boost::system::error_code &ec,

src/asio_client_stream.cc

@@ -32,7 +32,10 @@ namespace nghttp2 {
 namespace asio_http2 {
 namespace client {
 
-stream::stream(session_impl *sess) : sess_(sess), stream_id_(0) {}
+stream::stream(session_impl *sess) : sess_(sess), stream_id_(0)
+{
+  request_.impl().stream(this);
+}
 
 void stream::cancel() { sess_->cancel(*this); }