Flex mobile while loop silently failing (halp!)

Question

Here is my code - fairly simple, just trying to add years to an array to use as a data object later.
     public var yearsvar:Array;
     private function createDates():void
     var x:int = new int(1);
     var curYear:Date = new Date();
     var z:int = new int(curYear.fullYear);
     var i:int = new int(z-90);
     while (i < z)
          yearsvar[x] = i;
          i++;
          x++;
     year_dd.dataProvider = new ArrayCollection(yearsvar);
Using some debugging i've narrowed it down to something to do with the yearsvar[x] = i; statement - it gives me no errors and bombs out of the function silently. I'm at a loss as this seems like it should work. Perhaps I'm going crazy and have missed something.

Answer 1

I'm sure there are dozens of ways to do this, here is one.  Sorry about the formatting, this is through email.
public var acYearList:ArrayCollection = new ArrayCollection();
//Populate the yearlist arraycollection with years.
protected function CreateYearList():void
   var dCurrentDate:Date = new Date();
   var nYearCount:int = dCurrentDate.fullYear;
   //Add 90 to the current year for the total, add one to offset for the LT (<)
   var nYearTotal:int = nYearCount + 90 + 1;
   //Loop until year count equals year total.
   for (nYearCount; nYearCount < nYearTotal; nYearCount++)
      //Add the current year to the arraycollection.
      acYearList.addItem(nYearCount);
<!-- Years in a List  -->
<s:DropDownList id="ddlYears" dataProvider="" />
Hope this helps some.