时好时坏的，同样一份代码，有时候能compile成功，有时候又不能compile成功。
报错信息如下
ReferenceError: cb is not defined
at submitChanges (C:\CocosCreator\resources\app.asar\asset-db\core\watch.js:1:3187)
at C:\CocosCreator\resources\app.asar\editor\core\preview-serve
r.js:1:2647
at Layer.handle [as handle_request] (C:\CocosCreator\resources\app.asar\node_modules\express\lib\router\layer.js:95:5)
at next (C:\CocosCreator\resources\app.asar\node_m
odules\express\lib\router\route.js:131:13)
at Route.dispatch (C:\CocosCreator\resources\app.asar\node_modules\express\lib\router\route.js:112:3)
at Layer.handle [as handle_request]
(C:\CocosCreator\resources\app.asar\node_modules\express\lib\router\layer.js:95:5)
at C:\CocosCreator\resources\app.asar\node_modules\express\lib\router\index.js:277:22
at Function.
process_params (C:\CocosCreator\resources\app.asar\node_modules\express\lib\router\index.js:330:12)
at next (C:\CocosCreator\resources\app.asar\node_modules\express\lib\router\index.js:271:10)
&
nbsp; at C:\CocosCreator\resources\app.asar\editor\core\preview-server.js:1:1812
谢谢反馈！这边有点 bug