Remove extraneous strand from example

fix #1288

CHANGELOG.md

@@ -7,6 +7,7 @@ Version 187:
 * Fix a spurious gcc warning
 * Test for gcc warning bug
 * Add missing include
+* Remove extraneous strand from example
 
 --------------------------------------------------------------------------------
 

doc/qbk/09_releases.qbk

@@ -33,6 +33,8 @@
 
 * ([issue 1263]) Fix uninitialized comparison in buffers iterator
 
+* ([issue 1288]) Remove extraneous strand from example
+
 * Workaround for http-server-fast and libstdc++
 
 * Partial support for `BOOST_NO_EXCEPTIONS`

example/advanced/server-flex/advanced_server_flex.cpp

@@ -546,8 +546,6 @@ class ssl_websocket_session
     , public std::enable_shared_from_this<ssl_websocket_session>
 {
     websocket::stream<boost::beast::ssl_stream<tcp::socket>> ws_;
-    boost::asio::strand<
-        boost::asio::io_context::executor_type> strand_;
     bool eof_ = false;
 
 public:
@@ -557,7 +555,6 @@ public:
         : websocket_session<ssl_websocket_session>(
             stream.get_executor().context())
         , ws_(std::move(stream))
-        , strand_(ws_.get_executor())
     {
     }