XBT_INFO("Mailbox::listen_from() returns %ld (should return my pid, which is %ld)", mailbox->listen_from(),
simgrid::s4u::this_actor::get_pid());
XBT_INFO("Mailbox::listen_from() returns %ld (should return my pid, which is %ld)", mailbox->listen_from(),
simgrid::s4u::this_actor::get_pid());