Adding "config.plugins.delete('html')" throws URIError on pageload

[chasegiunta]

Version

3.0.0-rc.3

Reproduction link

https://cli.vuejs.org/config/#disable-generating-index-html

Steps to reproduce

• Scaffold project (zero features enabled works fine)
• Create vue.config.js
• Add (as per the docs here: https://cli.vuejs.org/config/#disable-generating-index-html)

module.exports = {
chainWebpack: config => {
    config.plugins.delete('html')
    config.plugins.delete('preload')
    config.plugins.delete('prefetch')
  }
}

and save.

• Run yarn serve
• Try to load dev server.

What is expected?

Page load successfully

What is actually happening?

Page load fails with

URIError: Failed to decode param '/%3C%=%20BASE_URL%20%%3Efavicon.ico'
    at decodeURIComponent (<anonymous>)

The exact stack trace is identical to the one referenced here: #1451 though seems a different cause. There is no baseUrl being set in vue.config.js.

---

This seems to stem from the config.plugins.delete('html') line.

Commenting this out, restarting the dev server, and loading the page works great.

[chasegiunta]

Ah, figured out what was going on. Didn't realize the devServer was still pointing to public/index.html, thus running into <link rel="icon" href="<%= BASE_URL %>favicon.ico"> and exploding.

So I need to point devServer to the correct file.