op_nextop cLOOP->op_nextop opindex
op_lastop cLOOP->op_lastop opindex
cop_label cCOP->cop_label pvcontents
-cop_stash *(SV**)&cCOP->cop_stash svindex
+cop_stashpv cCOP pvcontents x
cop_file cCOP pvcontents x
cop_seq cCOP->cop_seq U32
cop_arybase cCOP->cop_arybase I32