protocol+domain+port gets added to asPath after a HMR

[Zn4rK]

Bug report

If I pass down ctx.ctx.asPath and print it in my <Component /> and then force a HMR, it'll add the protocol+domain+port to the beginning of asPath.

{
  "url": {
    "query": {},
    "pathname": "/",
    "asPath": "/"
  }
}

// After a bundle rebuild

{
  "url": {
    "query": {},
    "pathname": "/",
    "asPath": "http://localhost:3000/"
  }
}

To Reproduce

pages/_app.js:

import App, { Container } from 'next/app';
import React from 'react';

export default class MyApp extends App {
  static async getInitialProps ({ Component, router, ctx }) {
    const { query, pathname, asPath } = ctx;
    return { url: { query, pathname, asPath } };
  }

  render () {
    const {Component, url} = this.props;
    return (<Container><Component url={url} /></Container>);
  }
}

pages/index.js:

export default (props) => <pre>{JSON.stringify(props, null, 2)}</pre>;

Force a bundle rebuild by adding some text and save.

System information

• Version of Next.js: 6.0.3

Other information

As discussed on Slack, it's related to this line.

[timneutkens]

As mentioned on slack I couldn't reproduce this issue, but the variable passed into getRouteInfo is definitely wrong there.