Closed
Description
Before You File a Bug Report Please Confirm You Have Done The Following...
- I have tried restarting my IDE and the issue persists.
- I have updated to the latest version of the packages.
- I have searched for related issues and found none that matched my issue.
- I have read the FAQ and my problem is not listed.
Relevant Package
types
Playground Link
No response
Repro Code
import { Linter } from "eslint";
import tseslint from "typescript-eslint";
declare const x: Linter.Config;
tseslint.config(x);tsconfig
Expected Result
No TS errors should be reported.
Actual Result
A TS error was reported:
index.ts:6:17 - error TS2345: Argument of type 'Config<RulesRecord>' is not assignable to parameter of type 'InfiniteDepthConfigWithExtends'.
Type 'Config<RulesRecord>' is not assignable to type 'ConfigWithExtends'.
Types of property 'languageOptions' are incompatible.
Type 'import("node_modules/eslint/lib/types/index").Linter.LanguageOptions | undefined' is not assignable to type 'import("node_modules/@typescript-eslint/utils/dist/ts-eslint/Config").FlatConfig.LanguageOptions | undefined'.
Type 'import("node_modules/eslint/lib/types/index").Linter.LanguageOptions' is not assignable to type 'import("node_modules/@typescript-eslint/utils/dist/ts-eslint/Config").FlatConfig.LanguageOptions'.
Types of property 'ecmaVersion' are incompatible.
Type 'EcmaVersion | undefined' is not assignable to type 'EcmaVersion'.
Type '17' is not assignable to type 'EcmaVersion'.
6 tseslint.config(x);
Additional Info
This is a regression beginning in ESLint 9.29.
This will surface itself if you are using a predefined config for an ESLint plugin that defines its types using types from eslint.
Obviously, this is trivial to fix, but is it worth discussing a more permanent solution to this, so that we don't have to keep manually keeping this in sync with ESLint?
Should we have some sort of automated test to catch this?
Versions
| package | version |
|---|---|
@typescript-eslint/types |
8.34.0 |
ESLint |
9.29.0 |
{ "compilerOptions": { "module": "nodenext" } }