[LayaAir 1.0]graphics.drawlines异常

代码如下：
(function()
{
var Sprite  = Laya.Sprite;
var Stage   = Laya.Stage;
var Browser = Laya.Browser;
var WebGL   = Laya.WebGL;
 
(function()
{
// 不支持WebGL时自动切换至Canvas
Laya.init(Browser.clientWidth, Browser.clientHeight, WebGL);
 
Laya.stage.alignV = Stage.ALIGN_MIDDLE;
Laya.stage.alignH = Stage.ALIGN_CENTER;
 
Laya.stage.scaleMode = "showall";
Laya.stage.bgColor = "#232628";
 
drawPentagram();
})();
 
function drawPentagram()
{
var canvas = new Sprite();
Laya.stage.addChild(canvas);
 
var path = [336, 515, 338, 515, 341, 515, 349, 515, 369, 513, 391, 513, 408, 513, 419, 515, 441, 519, 459, 521, 471, 524, 480, 524, 485, 524, 491, 524, 497, 524, 508, 524, 519, 524, 529, 524, 540, 536, 547, 536, 553, 536, 556, 536, 562, 533, 560, 533, 556, 536, 547, 536, 538, 537, 532, 537, 519, 537, 508, 539, 488, 541, 482, 541, 476, 541, 458, 547, 447, 547, 437, 547, 432, 547, 427, 547, 419, 547, 413, 547, 411, 548, 408, 548, 406, 547, 408, 544, 408, 544];
 
canvas.graphics.drawLines(0, 0, path, "#ff0000", 10);
}
})();

异常指的是什么？ 正常运行了没有报错