simgrid::s4u::Actor::on_creation.connect([](simgrid::s4u::ActorPtr actor) {
XBT_DEBUG("creating the extension to store user data");
- actor->extension_set(new simgrid::msg::ActorUserData(actor));
+ actor->extension_set(new simgrid::msg::ActorUserData());
});
simgrid::s4u::Actor::on_destruction.connect([](simgrid::s4u::ActorPtr actor) {