vue-server-render: when the serverCacheKey option is a string，there is no error or tip

[maunier]

Version

2.3.4

Reproduction link

https://github.com/zhaorui19910121/my-blog/blob/master/src/views/App.vue

Steps to reproduce

The link is my demo to learn vue ssr. Clone and npm install -> modify the serverCacheKey options in App.vue to a string -> npm start -> localhost: 3000

What is expected?

There should an error or a tip show in the terminal, but there is nothing.

What is actually happening?

Nothing is rendered in my browser, and there is no error or tip in my terminal. I don't know what happened. It need much time to debug.

---

I think the source code in vue-server-render/build.js:

var key = name   '::'   getKey(node.componentOptions.propsData);

should throw an error, but i don't know why it doesn't.

[yyx990803]

There is an error if you add proper error handling.