text: (function() {
      var exception;
      try {
          var list = { 'a' : 5 };
          for(const { x = x } in list)
              x();
      } catch (e) {
          exception = e;
      }
  
      if (exception != "ReferenceError: Cannot access uninitialized variable.")
          throw "FAILED";
  })();
  