ID_ENTRY_SYM      337 symbol.c           rb_ary_store(ary, (long)idx + ID_ENTRY_SYM, sym);
ID_ENTRY_SYM      362 symbol.c       	VALUE sym = get_id_entry(num, ID_ENTRY_SYM);
ID_ENTRY_SYM      729 symbol.c           return get_id_entry(rb_id_to_serial(x), ID_ENTRY_SYM);