vue-template-compiler line number

[fleksin]

What problem does this feature solve?

Recently I am trying to write a webpack loader for vue component, during which I came across the package vue-template-compiler.
It works perfectly except that it doesn't have any location info in the ast.

I read something here:

http://echizen.github.io/tech/2017/10-29-vue2wx

It's in Chinese, but you can see the ast result from the compiler method has "originLine" to indicate position.
But When I tried it I didn't get the "originLine", link:

https://runkit.com/fleksin/5b754fd8f424830012365766

So I am not sure if it's already a feature or is it removed from 2.5.17, or am I missing something in the options ?
btw, the version of vue-template-compiler I'm using is 2.5.17.
Some general direction would be much apprieciated.
Thanks in advance :)

What does the proposed API look like?

return ast like this:

{
   ast:   {
      ...
     originLine: xx,
   }
}

[posva]

Duplicate of #6338, PR at #7127

[fleksin]

Thanks! :)