[Bug Report] 代码错误提示定位错误

[cpxGithub]

vux-loader version

1.2.9

OS/Browsers version

window10/chrome v71.0.3578.98

Vue version

2.5.20

Code

编写错误代码即可

Steps to reproduce

1.使用vux-loader按需加载组件
2.在created函数中书写错误代码如let obj = {} obj.push()
3.在浏览器中查看错误提示，提示行数不准确
4.在webpack中去掉vux-loader，错误提示正常；

What is Expected?

代码错误提示定位准确

What is actually happening?

代码错误提示定位错误