<cfscript>
function f1() {
    var data = {
      a : {
        id : 1,
        b : {
          id : 2
        }
      }
    };


    var myFunc = function() {
      writeDump(data);
      writeDump(data.a);
      writeDump(structKeyArray(data.a));
      writeDump(data.a.id); //shows undefined on ACF10-2016
      writeDump(data.a["id"]); //shows undefined on ACF10-2016
      writeDump(data.a["ID"]); //shows undefined on ACF10-2016
      writeDump(data.a.b); //shows undefined on ACF10-2016
      writeDump(structKeyArray(data["a"]["b"]));
      writeDump(data.a.b.id); //shows undefined on ACF10-2016
    };

    myFunc();
}

f1();

</cfscript>