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.

Playground Link

https://typescript-eslint.io/play/#ts=5.4.5&fileType=.mts&code=MYGwhgzhAEAqCmEAuxL2gbwLAChrQAcBXAIxAEthoB7AJ1gAtbqB3AHgFVp4APJeAHYATGAFFazWgD4AFPAl0AykQIEK8gFzQZASmgBeKdA57sefNGDUByaBGoBbeOMkHuC2stXraugNy4FtBITKx2js4eAeYAvrgxQA&eslintrc=N4KABGBEBOCuA2BTAzpAXGUEKQAIBcBPABxQGNoBLY-AWhXkoDt8B6AeyfkNvwAto7AO71og6OiiIx7CeDABfEAqA&tsconfig=N4KABGBEDGD2C2AHAlgGwKYCcDyiAuysAdgM6QBcYoEEkJemy0eAcgK6qoDCAFutAGsylBm3TgwAXxCSgA&tokens=false

Repro Code

class Testcase {
  public orThrow<U extends Error>(errorSupplier: () => U) {
    const someError = errorSupplier();
    throw someError;
  }
}

ESLint Config

{
  "rules": {
    "@typescript-eslint/only-throw-error": "error"
  }
}

tsconfig

{
  "compilerOptions": {
    "strictNullChecks": true
  }
}

Expected Result

No warning

Actual Result

Expected an error object to be thrown @typescript-eslint/only-throw-error

Additional Info

const someError: U fails, but
const someError: Error passes.

Given that U extends Error I expect this to pass as well.