Error while loading rule 'vue/no-confusing-v-for-v-if': Cannot convert undefined or null to object

[tereshhhchenko]

Error while loading rule 'vue/no-confusing-v-for-v-if': Cannot convert undefined or null to object

Tell us about your environment

• ESLint Version: 3.19.0
• eslint-plugin-vue Version: 3.13.0
• Node Version: 8.4.0

I'm using ESLint in Visual Studio Code. But the same issue appears in console.

Please show your full configuration:

{
  "extends": ["airbnb-base", "plugin:vue/recommended"],
  "plugins": ["vue", "html", "class-property"],
  "parser": "vue-eslint-parser",
  "parserOptions": {
    "parser": "babel-eslint",
    "ecmaVersion": 2017,
    "sourceType": "module"
  },
  "rules": {
    "import/no-unresolved": 0,
    "import/no-unassigned-import": 0,
    "import/no-extraneous-dependencies": 0,
    "import/extensions": 0,
    "class-property/rule-name": 2
  }
}

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

I don't have any v-if or v-for in the project. Eslint simply never starts to lint in this conditions.

What did you expect to happen?

It starts linting

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

> eslint client/**/*.{vue,js}

Error while loading rule 'vue/no-confusing-v-for-v-if': Cannot convert undefined or null to object
TypeError: Error while loading rule 'vue/no-confusing-v-for-v-if': Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at Object.keys.filter.forEach.key (/home/s/Git/decompose/node_modules/eslint/lib/eslint.js:872:28)
    at Array.forEach (<anonymous>)
    at EventEmitter.module.exports.api.verify (/home/s/Git/decompose/node_modules/eslint/lib/eslint.js:841:93)
    at localVerify (/home/s/Git/decompose/node_modules/eslint-plugin-html/src/index.js:107:14)
    at EventEmitter.eslint.verify (/home/s/Git/decompose/node_modules/eslint-plugin-html/src/index.js:147:18)
    at processText (/home/s/Git/decompose/node_modules/eslint/lib/cli-engine.js:264:31)
    at processFile (/home/s/Git/decompose/node_modules/eslint/lib/cli-engine.js:303:18)
    at executeOnFile (/home/s/Git/decompose/node_modules/eslint/lib/cli-engine.js:672:25)
    at fileList.forEach.fileInfo (/home/s/Git/decompose/node_modules/eslint/lib/cli-engine.js:710:13)

[tereshhhchenko]

After updating Eslint to 4.6.1

> eslint client/**/*.{vue,js}

AST is missing the tokens array.
Error: AST is missing the tokens array.
    at validate (/home/s/Git/decompose/node_modules/eslint/lib/util/source-code.js:30:15)
    at SourceCode (/home/s/Git/decompose/node_modules/eslint/lib/util/source-code.js:117:9)
    at Linter.verify (/home/s/Git/decompose/node_modules/eslint/lib/linter.js:878:31)
    at localVerify (/home/s/Git/decompose/node_modules/eslint-plugin-html/src/index.js:107:14)
    at Linter.eslint.verify (/home/s/Git/decompose/node_modules/eslint-plugin-html/src/index.js:147:18)
    at processText (/home/s/Git/decompose/node_modules/eslint/lib/cli-engine.js:203:31)
    at processFile (/home/s/Git/decompose/node_modules/eslint/lib/cli-engine.js:245:18)
    at executeOnFile (/home/s/Git/decompose/node_modules/eslint/lib/cli-engine.js:585:25)
    at fileList.forEach.fileInfo (/home/s/Git/decompose/node_modules/eslint/lib/cli-engine.js:622:13)
    at Array.forEach (<anonymous>)

[tereshhhchenko]

Solved. I needed to remove parser at all.

{
  "extends": ["airbnb-base", "plugin:vue/recommended"],
  "plugins": ["vue", "html", "class-property"],
  "parserOptions": {
    "parser": "babel-eslint",
    "ecmaVersion": 2017,
    "sourceType": "module"
  },
  "rules": {
    "import/no-unresolved": 0,
    "import/no-unassigned-import": 0,
    "import/no-extraneous-dependencies": 0,
    "import/extensions": 0,
    "class-property/rule-name": 2
  }
}

[GeoffZhu]

Hi, @HelloDeadline
I checked the configuration of ESlint, There is no parser option in parserOptions, where you find that?

[GeoffZhu]

Find It , It's a option of vue-eslint-parser

[3Dcube]

I have the same issue

• ESLint Version: 4.9.0
• Node Version: v8.7.0
• eslint-plugin-vue: 3.13.1

module.exports = {
  root: true,
  parser: 'babel-eslint',
  parserOptions: {
    sourceType: 'module'
  },
  env: {
    browser: true,
  },
  extends: [
    'eslint:recommended',
    'plugin:vue/recommended'
  ],
  plugins: [
    'vue',
    'html'
  ],
  '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
  }
}

output:

PS D:\dev\my-project> npm run lint

> my-project@1.0.0 lint D:\dev\my-project
> eslint --ext .js,.vue src test/unit/specs

Error while loading rule 'vue/no-confusing-v-for-v-if': Cannot convert undefined or null to object
TypeError: Error while loading rule 'vue/no-confusing-v-for-v-if': Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at Object.keys.forEach.ruleId (D:\dev\my-project\node_modules\eslint\lib\linter.js:927:24)
    at Array.forEach (<anonymous>)
    at Linter._verifyWithoutProcessors (D:\dev\my-project\node_modules\eslint\lib\linter.js:864:35)
    at preprocess.map.textBlock (D:\dev\my-project\node_modules\eslint\lib\linter.js:993:35)
    at Array.map (<anonymous>)
    at Linter.verify (D:\dev\my-project\node_modules\eslint\lib\linter.js:992:42)
    at localVerify (D:\dev\my-project\node_modules\eslint-plugin-html\src\index.js:107:14)
    at currentInfos.code.forEach (D:\dev\my-project\node_modules\eslint-plugin-html\src\index.js:135:13)
    at Array.forEach (<anonymous>)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! my-project@1.0.0 lint: `eslint --ext .js,.vue src test/unit/specs`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the my-project@1.0.0 lint script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\User\AppData\Roaming\npm-cache\_logs\2017-10-15T05_29_34_867Z-debug.log

[mysticatea]

@3Dcube See this section.

[3Dcube]

thanks