CHECK_INTEGER 555 iseq.c version1 = CHECK_INTEGER(rb_ary_entry(data, i++)); CHECK_INTEGER 556 iseq.c version2 = CHECK_INTEGER(rb_ary_entry(data, i++)); CHECK_INTEGER 557 iseq.c format_type = CHECK_INTEGER(rb_ary_entry(data, i++)); CHECK_INTEGER 565 iseq.c first_lineno = CHECK_INTEGER(rb_ary_entry(data, i++));