Setting values in arguments still flags `unused var`.

Tell us about your environment ESLint Version: 3.17.1
Node Version: 6.2.2
npm Version: 3.9.5

What parser (default, Babel-ESLint, etc.) are you using? babel-eslint 6.1.2

Configuration:

module.exports = {
  root: true,
  parser: 'babel-eslint',
  parserOptions: {
    sourceType: 'module'
  },
  // https://github.com/feross/standard/blob/master/RULES.md#javascript-standard-style
  extends: 'vue',
  // required to lint *.vue files
  plugins: [
    'vue',
    'html'
  ],
  env: {
    browser: true
  },
  // add your custom rules here
  'rules': {
    // allow paren-less arrow functions
    'arrow-parens': 0,
    // allow async-await
    'generator-star-spacing': 0,
    // allow debugger during development
    'no-debugger': process.env.NODE_ENV === 'production' ? 2 : 0,
    'no-return-assign': 2,
    // disallow indentation using both tabs and spaces
    'no-mixed-spaces-and-tabs': 2,
    // ensure consistent 2 space indentation and indent cases under switch
    'indent': [2, 2, {'SwitchCase': 1}]
  }
}

What did you do? Please include the actual source code causing the issue.

I get no-unused-vars for assignments in function arguments:

let bar
this.foo(bar = false)

[not-an-aardvark]

Yes, it’s still considered unused, because the value of bar is never read. So the code can be replaced with:

this.foo(false)

[alberto]

Closing this issue as it looks like the question has been answered. Please feel free to visit us in the ESLint Gitter if you have any other issues!