ISEQ_TYPE_MAIN    472 compile.c      	  case ISEQ_TYPE_MAIN:
ISEQ_TYPE_MAIN   5328 compile.c      	       iseq->type == ISEQ_TYPE_MAIN
ISEQ_TYPE_MAIN    319 iseq.c         				parent, ISEQ_TYPE_MAIN, &COMPILE_OPTION_DEFAULT);
ISEQ_TYPE_MAIN    414 iseq.c         	st_insert(type_map, ID2SYM(rb_intern("main")), ISEQ_TYPE_MAIN);
ISEQ_TYPE_MAIN   1060 iseq.c               case ISEQ_TYPE_MAIN:   type = sym_main;   break;