资源管理器面板下文件夹打不开

Creator 2.x
#1

cocos creator 2.0.8
在资源管理面板下点击文件夹不展开。通过搜索资源还是可以搜到。
错误提示

RangeError: Invalid array length
    at Object.exports.updateShowNodes (C:\CocosCreator\resources\app.asar\editor\builtin\assets\panel\utils\cache.js:1:551)
    at Object.exports.updateShowNodes (C:\CocosCreator\resources\app.asar\editor\builtin\assets\panel\utils\operation.js:1:1633)
    at Object.exports.fold (C:\CocosCreator\resources\app.asar\editor\builtin\assets\panel\utils\operation.js:1:1138)
    at Editor.assetdb.queryInfoByUuid (C:\CocosCreator\resources\app.asar\editor\builtin\assets\panel\component\node.js:1:5706)
    at EventEmitter.o.on.n (C:\CocosCreator\resources\app.asar\editor-framework\lib\renderer\ipc.js:1:3753)
    at emitMany (events.js:127:13)
    at EventEmitter.emit (events.js:204:7)
#2

试下将meta文件删除后，重新打开编辑器

#3

还是一样。

#4

找到问题了。
自己覆盖了Array.prototype.toString 方法就导致这个问题了。