Eslint: comma-dangle false positive when spread is last property

[nsimonson]

Tell us about your environment

• ESLint Version: 3.9.1

• Node Version: 6.5.0

• npm Version: 3.10.3

• yarn Version: 0.16.1

What parser (default, Babel-ESLint, etc.) are you using?
Babel-ESLint

Please show your full configuration:

module.exports = {
  parser: 'babel-eslint',
  rules: {
    'comma-dangle': ['error', 'always-multiline'],
  },
}

What did you do? Please include the actual source code causing the issue.
Updated eslint to 3.9.1.

const Select = ({
  input,
  meta,
  options,
  optionComponent,
  ...props,
}) => { ... }

What did you expect to happen?
This multiline object should pass for our comma-dangle rule: always-multiline.

What actually happened? Please include the actual, raw output from ESLint.
Eslint threw an error for the trailing comma after ...props

app/components/molecules/Select.js
  24:11  error  Unexpected trailing comma                                 comma-dangle

[not-an-aardvark]

Thanks for the report.

However, I think this is a duplicate of https://github.com/eslint/eslint/issues/7422 and https://github.com/eslint/eslint/issues/7463. According to the rest/spread spec, trailing commas are not allowed after rest properties, so your syntax is invalid. To fix this issue, you should remove the comma after the rest property.

Also see: https://github.com/eslint/eslint/issues/7297