examples & tests use context instead of coroutine.

example/websocket/server/fast/websocket_server_fast.cpp

@@ -30,6 +30,7 @@
 #include <boost/beast/http.hpp>
 #include <boost/beast/version.hpp>
 #include <boost/beast/websocket.hpp>
+#include <boost/asio/detached.hpp>
 #include <boost/asio/spawn.hpp>
 #include <boost/asio/strand.hpp>
 #include <algorithm>
@@ -411,7 +412,7 @@ do_coro_listen(
                 &do_coro_session,
                 websocket::stream<
                     beast::tcp_stream>(std::move(socket)),
-                std::placeholders::_1));
+                std::placeholders::_1), boost::asio::detached);
     }
 }
 
@@ -463,7 +464,7 @@ int main(int argc, char* argv[])
             tcp::endpoint{
                 address,
                 static_cast<unsigned short>(port + 2u)},
-            std::placeholders::_1));
+            std::placeholders::_1), boost::asio::detached);
 
     // Run the I/O service on the requested number of threads
     std::vector<std::thread> v;