macos10.12.4，FB4.7，layaair as3 1.7.4beta

会报一些warning（全路径太长，我截掉了，另外行号可能对不上，我贴上来的时候删掉了注释和空行）
用windows+FB编译出来的页面，mac下chrome是能正常显示的，所以怀疑是我的mac编译环境有问题？

/LayaAirTest/src/LayaAirTest.as (8):warning:Laya.init This variable is not defined.
/LayaAirTest/src/LayaAirTest.as (9):warning:Laya.timer.currTimer This variable is not defined.
/LayaAirTest/src/LayaAirTest.as (20):warning:Laya.stage.bgColor This variable is not defined.
/LayaAirTest/src/LayaAirTest.as (22):warning:Laya.stage.addChild This variable is not defined.

代码如下：
package

{
    import laya.display.Text;
    public class LayaAirTest
    {
        public function LayaAirTest()
        {
            Laya.init(600, 300);
            var txt:Text   = new Text();
            txt.text     = "abc"+Laya.timer.currTimer;
            txt.color     = '#FF0000';             
            txt.fontSize    = 66;
            txt.stroke     = 5;
            txt.strokeColor     = '#FFFFFF';
            txt.bold      = true;
            txt.pos(60,100);
            Laya.stage.bgColor  = '#23238E';
            Laya.stage.addChild(txt);
        }
    }
}