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 havesearched for related issues and found none that matched my issue.
• I haveread the FAQ and my problem is not listed.

Relevant Package

typescript-eslint

Playground Link

https://typescript-eslint.io/play#ts=5.8.2&fileType=.tsx&code=KYDwDg9gTgLgBASwHY2FAZgQwMbDgMQGcBZCbAazlFSQBNC4AKGATzGAnTnUIEo4A3gFgAUAF8gA&eslintrc=N4KABGBEBOCuA2BTAzpAXGYBfEWg&tsconfig=N4KABGBEDGD2C2AHAlgGwKYCcDyiAuysAdgM6QBcYoEEkJemy0eAcgK6qoDCAFutAGsylBm3TgwAXxCSgA&tokens=false

Repro Code

exportinterfaceFsMockextends(typeoffs){}

ESLint Config

tsconfig

Expected Result

An error with message

An interface can only extend an identifier/qualified-name with optional type arguments.

Actual Result

Successfuly parsered.

Additional Info

All cases mentioned inmicrosoft/TypeScript#31843 should be rejected.

Versions