So the connection don´t makes a copy of the handler, https://groups.google.com/forum/?fromgroups#!topic/cpp-netlib/rz54sRpo7WI

idleman · glynos · commit 2826162b638e · 2012-04-18T21:44:25.000+02:00
diff --git a/boost/network/protocol/http/server/async_connection.hpp b/boost/network/protocol/http/server/async_connection.hpp
@@ -447,7 +447,7 @@ namespace boost { namespace network { namespace http {
                             thread_pool().post(
                                 boost::bind(
                                     &Handler::operator(),
-                                    handler,
+                                    &handler,
                                     cref(request_),
                                     async_connection<Tag,Handler>::shared_from_this()));
                             return;
