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• I have tried restarting my IDE and the issue persists.
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Relevant Package

utils

Playground Link

No response

Repro Code

const parserServices = getParserServices(context, true);

ESLint Config

{
  "parser": "@babel/eslint-parser",
  "parserOptions": {
    "ecmaVersion": "latest",
    "requireConfigFile": false,
    "babelOptions": {
      "babelrc": false,
      "configFile": false
    }
  }
}

tsconfig

{
  "compilerOptions": {
    "lib": ["ESNext"],
    "module": "commonjs",
    "moduleResolution": "node",
    "skipLibCheck": true,
    "target": "ESNext"
  },
  "files": ["file.ts"]
}

Expected Result

typeof parserServices should be ParserServicesWithoutTypeInformation

Actual Result

An error is thrown:

You have used a rule which requires parserServices to be generated. You must therefore provide a value for the "parserOptions.project" property for @typescript-eslint/parser.

Additional Info

This check is testing for null or undefined but my context.parserServices is an empty object and thus the error is thrown.

https://github.com/typescript-eslint/typescript-eslint/blob/v6/packages/utils/src/eslint-utils/getParserServices.ts#L35-L39

Edit: Looks like parserServices isn't actually set directly on the context object but is instead being inherited through its prototype chain.

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