regression babel error with 15.0.0-beta.3

[pi0]

Version

15.0.0-beta.3

Reproduction link

https://circleci.com/gh/nuxt/nuxt.js/987

Steps to reproduce

Just after upgrading nuxt to use vue-loader@15.0.0-beta.3 this error happens:

Unknown option: base.ident. Check out http://babeljs.io/docs/usage/options/ for more information about options.

A common cause of this error is the presence of a configuration options object without the corresponding preset name. Example:

Invalid:
  `{ presets: [{option: value}] }`
Valid:
  `{ presets: [['presetName', {option: value}]] }`

What is expected?

working just like beta.2

What is actually happening?

not working just like beta.2

---

I'm not sure, but it may be a side-effect of eab9460.

[pi0]

That was too fast @yyx990803. Thank you for the explanation in the code.