CPPUNIT_ASSERT_THROW(pmt_msg_accepter_ref(sym), pmt_wrong_type);
CPPUNIT_ASSERT_THROW(pmt_msg_accepter_ref(p0), pmt_wrong_type);
CPPUNIT_ASSERT_THROW(pmt_msg_accepter_ref(sym), pmt_wrong_type);
CPPUNIT_ASSERT_THROW(pmt_msg_accepter_ref(p0), pmt_wrong_type);