Cascader使用nzLoadData时的错误

[huruomin]

Version

1.3.0

Environment

Mac Chrome

Reproduction link

https://ng-zorro-antd-start.stackblitz.io

Steps to reproduce

直接官网即可重现：

1、打开：https://ng.ant.design/components/cascader/zh
2、定位到“动态加载选项”的demo
3、随便选定一个leaf选项
4、点叉清空已选择的选项
5、再次尝试去下拉选择时，报错：

ERROR TypeError: Cannot read property 'length' of undefined
at n.loadRootOptions (main.9ad12f74ccc84f888c4c.js:1)
at n.beforeVisible (main.9ad12f74ccc84f888c4c.js:1)
at n.setMenuVisible (main.9ad12f74ccc84f888c4c.js:1)
at main.9ad12f74ccc84f888c4c.js:1
at t.invokeTask (polyfills.972894ed752435a22ec0.js:1)
at Object.onInvokeTask (main.9ad12f74ccc84f888c4c.js:1)
at t.invokeTask (polyfills.972894ed752435a22ec0.js:1)
at r.runTask (polyfills.972894ed752435a22ec0.js:1)
at e.invokeTask (polyfills.972894ed752435a22ec0.js:1)
at invoke (polyfills.972894ed752435a22ec0.js:1)

What is expected?

不报错

What is actually happening?

报错

Other?

[wzhudev]

@huruomin Thanks for your feedback. We will look into this.

[lock]

This thread has been automatically locked because it has not had recent activity. Please open a new issue for related bugs and link to relevant comments in this thread.