Error with os-specific directory separators when using parserOptions.project

Tell us about your environment

• ESLint Version: 7.12.0
• Node Version: 14.8.0
• npm Version: 6.14.7

What parser (default, @babel/eslint-parser, @typescript-eslint/parser, etc.) are you using? @typescript-eslint/parser

Please show your full configuration:

Configuration

module.exports = {
  root: true,
  parser: '@typescript-eslint/parser',
  parserOptions: {
    project: 'c:/code/game/src/main.ts',
  },
  plugins: [
    '@typescript-eslint',
  ],
  extends: [
    'eslint:recommended',
    'plugin:@typescript-eslint/recommended',
    'airbnb-typescript',
  ],
  rules: {
    'import/prefer-default-export': 'off',
    'import/no-unresolved': 'off',
    'import/extensions': 'off',

    'no-console': 'off',
  },
};

package.json

{
  "name": "game",
  "version": "1.0.0",
  "description": "",
  "scripts": {
    "build": "webpack --config webpack.config.js",
    "start": "webpack-dev-server --config webpack.config.js --host 0.0.0.0"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@typescript-eslint/eslint-plugin": "^4.4.1",
    "@typescript-eslint/parser": "^4.5.0",
    "copy-webpack-plugin": "^6.2.1",
    "electron": "^10.1.4",
    "eslint": "^7.12.0",
    "eslint-config-airbnb-typescript": "^12.0.0",
    "eslint-plugin-import": "^2.22.0",
    "eslint-plugin-jsx-a11y": "^6.3.1",
    "eslint-plugin-react": "^7.20.3",
    "eslint-plugin-react-hooks": "^4.0.8",
    "ts-loader": "^8.0.6",
    "typescript": "^4.0.3",
    "webpack": "^5.2.0",
    "webpack-cli": "3.3.12",
    "webpack-dev-server": "^3.11.0"
  },
  "dependencies": {
    "pixi.js": "^5.3.3"
  }
}

What did you do? Please include the actual source code causing the issue, as well as the command that you used to run ESLint.

// Happens to every .ts file in codebase

npx eslint . --ext .ts

What did you expect to happen? Linting

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

C:\Code\game\src\engine.ts
  0:0  error  Parsing error: Debug Failure. Expected c:/code/game/src/main.ts === c:\code\game\src\main.ts

C:\Code\game\src\main.ts
  0:0  error  Parsing error: Debug Failure. Expected c:/code/game/src/main.ts === c:\code\game\src\main.ts

... (same for every .ts file)

Are you willing to submit a pull request to fix this bug? No

[yeonjuan]

Hi @qucumbah 😃 I will close the issue because it was found to be a wrong configuration problem(user error) (https://github.com/typescript-eslint/typescript-eslint/issues/2705#issuecomment-715988066). Please comment if there is anything we missed.

cc. @mdjermanovic

[qucumbah]

New issue in case you want to track it: https://github.com/typescript-eslint/typescript-eslint/issues/2705