[bug] Trident causes error at android/ios project

[Daley]

error:Temporary register component read without being written to for source operand 2 at token 9 of vertex program.
code:
[
package
{
import away3d.cameras.Camera3D;
import away3d.containers.Scene3D;
import away3d.containers.View3D;
import away3d.debug.Trident;
import away3d.entities.Mesh;
import away3d.lights.PointLight;
import away3d.materials.TextureMaterial;
import away3d.primitives.CubeGeometry;
import away3d.textures.BitmapTexture;

import flash.display.BitmapData;
import flash.display.Sprite;
import flash.events.Event;
import flash.geom.Point;

public class TestTrident extends Sprite
{
    private var view:View3D;
    public function TestTrident()
    {
        addEventListener(Event.ADDED_TO_STAGE,init);
    }

    private function init(e:Event=null):void{
        stage.addEventListener(Event.ENTER_FRAME, onEnterFrame);

        initAway3D();
    }

    private function initAway3D():void{
        view= new View3D();
        addChild(view);

        var mylight:PointLight = new PointLight();
        view.scene.addChild(mylight);

        var bd:BitmapData=new BitmapData(128,128,true,0xffff0000);
        var texture:BitmapTexture = new BitmapTexture(bd);
        var material:TextureMaterial = new TextureMaterial(texture, true, false, true);
        var cube:CubeGeometry=new CubeGeometry();
        var mesh:Mesh=new Mesh(cube,material);
        view.scene.addChild(mesh);

        view.camera.y=-300;
        //comment two lines will be good
        var tt:Trident=new Trident(10,true);
        view.scene.addChild(tt);
    }

    private function onEnterFrame(e:Event):void{
        view.render();
    }

}

}

]