void checkStr(String s) { Env env = null; try { env = Exec2.exec(s); if (env.isAry()) { // Print complete frames for inspection Frame res = env.popAry(); String skey = env.key(); System.out.println(res.toStringAll()); env.subRef(res, skey); // But then end lifetime } else { System.out.println(env.resultString()); } } catch (IllegalArgumentException iae) { System.out.println(iae.getMessage()); } if (env != null) env.remove_and_unlock(); debug_print(s); }