Cannot read property 'comments' of undefined

[ccforward]

Version

13.0.3

Reproduction link

http://null

Steps to reproduce

When I update the vue-loader to 13.0.3 The webpack can not compile the .vue file and report an error.

The webpack version is 2.7.0

What is expected?

To compile the .vue file successfully.

What is actually happening?

The webpack can not compile the .vue file .
The error occured at 92 line.