Using router with rollup causes error

[dpa99c]

I'm having a problem getting the Riot Router to work with rollup.

Here's the steps to reproduce the issue using the rollup example:

Clone the examples and install dependencies for rollup example:

git clone https://github.com/riot/examples && cd examples/rollup
npm install

Add router module:

npm i -S @riotjs/route

Edit src/app.riot to add router code:

<app>
  <h1>Hi Riot!</h1>
  <md content={ content } />
  <router>
    <nav>
      <a href="/home">Home</a>
    </nav>
    <route path="/home">
      Home page
    </route>
  </router>

  <script>
    import Md from './md.riot'
    import {Router, Route} from '@riotjs/route'

    const name = 'Rollup'

    export default {
      components: {
        Md,
        Router,
        Route
      },
      content: `Hello **${ name }**!`
    }
  </script>

  <style>
    :host {
      --riot-color: #f04;
      display: block;
    }
    h1 {
      color: var(--riot-color);
      border-bottom: 1px solid var(--riot-color);
    }
  </style>
</app>

Rebuild and run:

npm run build && npm run server

Observe the router elements fail to render and the following error in JS console:

bundle.js:8446 Uncaught TypeError: Cannot destructure property 'slots' of 'undefined' as it is undefined.
    at bundle.js:8446
    at callOrAssign (bundle.js:1412)
    at bundle.js:1821
    at getTag (bundle.js:1063)
    at Object.update (bundle.js:1132)
    at Object.mount (bundle.js:1119)
    at bundle.js:1320
    at Array.forEach (<anonymous>)
    at Object.mount (bundle.js:1320)
    at Object.mount (bundle.js:2012)	   

Test environment is Windows 10 and browser Chrome 80.

[GianlucaGuarini]

The @riotjs/route depends on the lates Riot.js version 4.8.9 I have updated the example dependencies. There are no bugs you were using only an older riot version not compatible with the router