no-else-return rule issue

Tell us about your environment

• ESLint Version: 4.9.0
• Node Version: 8.6.0
• npm Version: 5.4.2

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

Please show your full configuration:

Configuration

{
  "extends": [
    "airbnb"
  ],
  "globals": {
    "fetch": false
  },
  "rules": {
    "indent": ["error", 4, {"SwitchCase": 1}],
    "react/jsx-indent": ["error", 4],
    "quote-props": "off",
    "react/sort-comp": 1,
    "func-names": 1,
    "object-shorthand": 1,
    "object-curly-newline": 1,
    "arrow-parens": 1,
    "default-case": 0,
    "prefer-const": 1,
    "space-before-function-paren": 1,
    "max-len": ["warn", 100],
    "prefer-template": 1,
    "consistent-return": 1,
    "global-require": 1,
    "vars-on-top": 1,
    "function-paren-newline": 1,
    "prefer-arrow-callback": 1,
    "spaced-comment": 1,
    "prefer-destructuring": 1,
    "prefer-promise-reject-errors": 1,
    "prefer-spread": 1,
    "radix": 1,
    "dot-notation": 1,
    "one-var": 1,
    "one-var-declaration-per-line": 1,
    "operator-assignment": 1,
    "array-callback-return": 1,
    "wrap-iife": 1,
    "guard-for-in": 1,
    "strict": 1,
    "lines-around-directive": 1,
    "no-prototype-builtins": 1,
    "no-useless-concat": 1,
    "no-restricted-syntax": 1,
    "no-restricted-globals": 1,
    "no-multi-assign": 1,
    "no-confusing-arrow": ["warn", {"allowParens": true}],
    "no-use-before-define": 1,
    "no-empty": 1,
    "no-mixed-operators": 1,
    "no-var": 1,
    "no-unused-vars": 1,
    "no-unused-expressions": 1,
    "no-param-reassign": 1,
    "no-useless-return": 1,
    "no-nested-ternary": 1,
    "no-shadow": 1,
    "no-lonely-if": 1,
    "no-undef": 1,
    "no-case-declarations": 1,
    "no-underscore-dangle": 1,
    "no-plusplus": 1,
    "no-else-return": 1,
    "no-bitwise": 1,
    "class-methods-use-this": ["warn", {"exceptMethods": []}],
    "array-bracket-spacing": ["warn", "never"],
    "arrow-body-style": ["warn", "as-needed"],
    "linebreak-style": ["warn", "unix"],
    "import/extensions": [1, "never", {"js": "never", "jsx": "never"}],
    "import/no-extraneous-dependencies": 1,
    "import/no-unresolved": 1,
    "import/no-mutable-exports": 1,
    "import/first": 1,
    "import/newline-after-import": 1,
    "import/prefer-default-export": 1,
    "jsx-quotes": ["warn", "prefer-single"],
    "react/react-in-jsx-scope": 1,
    "react/jsx-indent-props": ["error", 4],
    "react/jsx-first-prop-new-line": ["warn", "multiline-multidrop"],
    "react/jsx-closing-bracket-location": ["warn", "line-aligned"],
    "react/jsx-closing-tag-location": 1,
    "react/no-string-refs": 1,
    "react/no-unused-prop-types": 1,
    "react/no-children-prop": 1,
    "react/no-find-dom-node": 1,
    "react/no-array-index": 1,
    "react/require-default-props": 1,
    "react/jsx-no-bind": 1,
    "react/jsx-curly-brace-presence": ["warn", {"props": "never", "children": "never"}],
    "react/forbid-prop-types": ["warn", {"forbid": ["any", "array", "object"]}],
    "react/no-unescaped-entities": 1,
    "react/no-unused-state": 1,
    "react/no-array-index-key": 1,
    "react/no-did-mount-set-state": 1,
    "react/no-did-update-set-state": 1,
    "react/jsx-no-target-blank": 1,
    "react/jsx-wrap-multilines": 1,
    "jsx-a11y/no-noninteractive-element-interactions": 1,
    "jsx-a11y/click-events-have-key-events": 1,
    "jsx-a11y/label-has-for": 1,
    "jsx-a11y/alt-text": 1,
    "jsx-a11y/no-static-element-interactions": 1,
    "jsx-a11y/anchor-is-valid": 1,
    "jsx-a11y/no-redundant-roles": 1,
    "jsx-a11y/scope": 1,
    "jsx-a11y/interactive-supports-focus": 1,
    "comma-dangle": 0
  }
}

What did you do? Please include the actual source code causing the issue. Issue caused by eslint-config-airbnb-base@12.1.0 node_modules/eslint-config-airbnb-base/rules/best-practices.js:62

'no-else-return': ['error', { allowElseIf: true }],

What did you expect to happen? Run without error

What actually happened? Please include the actual, raw output from ESLint.

events.js:182 throw er; // Unhandled ‘error’ event ^ Error: /home/zakhargulchak/WebstormProjects/application-ngo2/node_modules/eslint-config-airbnb-base/rules/best-practices.js: Configuration for rule “no-else-return” is invalid: Value “[object Object]” should NOT have more than 0 items.

[aladdin-add]

we have added eslint version to error output (https://github.com/eslint/eslint/pull/9071), but seems not ideal. I was wondering adding version before every eslint running.

thanks for the reporting!

[zakhar-gulchak]

Found problem.

├─┬ gulp-eslint@4.0.0
│ ├── eslint@4.8.0

Gulp-eslint is using own dependency. And not the latest version.