GWT error when nesting for loops

gistfile1.txt

  public void resolveResize(Size targetSize)
  {
    // Main loop over layout boxes.
    for (CartesianLayoutBox box : xyLayout.getLayoutBoxes() )
    {
      // Try each resolution strategy, only one can match the box.
      // The acceptance dependent upon the resolution strategy identifying the relationship of the box to other boxes or the viewport.
      for (IResolutionStrategy resolutionStrategy : resolutionStrategies)
      {
        if ( resolutionStrategy.accepts(box) ) {
          throw new Error("RUN_STRATEGY_NOW");
        } 
      }
    }
  }
  
  ERROR:
  Uncaught TypeError: Cannot read property '$_nullMethod' of null
    at $resolveResize (PipelineSystem-0.js:6575)
    at $handleToggle (PipelineSystem-0.js:6514)
    at CouponLab$0methodref$handleToggle$Type.apply_87 [as apply_1] (PipelineSystem-0.js:6569)
    at $proxyMethod (PipelineSystem-0.js:2200)
    at $dispatchEvent (PipelineSystem-0.js:1146)
    at Button.dispatchControlAction (PipelineSystem-0.js:1488)
    at Control$2methodref$dispatchControlAction$Type.apply_33 [as apply_1] (PipelineSystem-0.js:4341)
    at $proxyMethod (PipelineSystem-0.js:2200)
    at DOMEventTarget$0methodref$proxyMethod$Type.apply_6 [as apply_0] (PipelineSystem-0.js:1808)
    at apply_88 (PipelineSystem-0.js:6655)
    at entry0 (PipelineSystem-0.js:6688)
    at HTMLButtonElement.<anonymous> (PipelineSystem-0.js:6678)
  
 GWT COMPILER OUTPUT AROUND ERROR, (PRETTY):

var Lclient_javabuilder_CouponLab$0methodref$handleToggle$Type_2_classLit = createForClass('client.javabuilder', 'CouponLab/0methodref$handleToggle$Type', 250);
function $resolveResize(this$static){
  var resolutionStrategy$iterator;
  for (null.$_nullMethod().$_nullMethod(); null.$_nullMethod();) {
    null.$_nullMethod();
    for (resolutionStrategy$iterator = new ArrayList$1(this$static.resolutionStrategies); resolutionStrategy$iterator.i < resolutionStrategy$iterator.this$01.array.length;) {
      castTo($next_0(resolutionStrategy$iterator), 346);
    }
  }
}