Suspected parameter incorrectly passed in @vue/babel-preset-app ?

[hejun200613224]

In the dependent package @vue/babel-preset-app, there is a parameter polyfills with default value
['es.array.iterator', 'es.promise', 'es.object.assign', 'es.promise.finally']

According to the documentation it's a list of core-js polyfills to pre-include when using useBuiltIns: 'usage'

But actually according to the source code, it was filtered in this line and then pass to envOptions.exclude of @babel/preset-env in this code. The excerpt is as follows.

  const envOptions = {
    bugfixes,
    corejs: useBuiltIns ? require('core-js/package.json').version : false,
    spec,
    loose,
    debug,
    modules,
    targets,
    useBuiltIns,
    ignoreBrowserslistConfig,
    configPath,
    include,
    exclude: polyfills.concat(exclude || []),
    shippedProposals,
    forceAllTransforms
  }

Does this code work in the correct process?
I noticed that if this parameter is configured(even the default values too), the polyfiils will eventually be excluded.

[fangbinwei]

These polyfills will be injected in entry files by this babel plugin. Exclude these polyfills so that it will be injected once.