if (port != MACH_PORT_NULL && port != _task_reply_port) {
_mig_set_reply_port(_task_reply_port);
(void) mach_port_mod_refs(mach_task_self(), port, MACH_PORT_RIGHT_RECEIVE, -1);
if (port != MACH_PORT_NULL && port != _task_reply_port) {
_mig_set_reply_port(_task_reply_port);
(void) mach_port_mod_refs(mach_task_self(), port, MACH_PORT_RIGHT_RECEIVE, -1);