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=5.1.6&fileType=.tsx&code=MYGwhgzhAECyCeAVAphALtA3gKGtYA9gHboBOArsGgaQBS57QBmBBAXNEeQLYBGypaAF5oAZgA0jKXgD0M6ANI1JkBQA8ADsirIAJgzwbyvEAEtg0XmFIcufAcLGToczgQWklpBgEosB6AA3AlNdZlZJK1IAbgYAX2wEoA&eslintrc=N4KABGBEBOCuA2BTAzpAXGUEKQAIBcBPABxQGNoBLY-AWhXkoDt8B6Jge1uYDNFpoAQwBGSWkVKoMkftA7RI4MAF8QyoA&tsconfig=N4KABGBEDGD2C2AHAlgGwKYCcDyiAuysAdgM6QBcYoEEkJemy0eFYDAruuGAL4g9A&tokens=false

Repro Code

class MyTest {
  constructor(
    foo: number = 3,         // error, as expected
    public bar: number = 3,  // no error
  ) {
    void foo, bar;
  }
}

ESLint Config

module.exports = {
  "rules": {
    "@typescript-eslint/no-inferrable-types": "error"
  }
}

tsconfig

{
  "compilerOptions": {
    "strict": true
  }
}

Expected Result

An error from @typescript-eslint/no-inferrable-types should appear for both parameters (both parameters include a type declaration for a trivially inferrable type).

Actual Result

An error from @typescript-eslint/no-inferrable-types appears for the standard parameter but not for the parameter written as a parameter property.

Additional Info

This issue appears with the default rule settings, i.e.

{
  ignoreParameters: false,
  ignoreProperties: false
}

This behavior might be considered expected when ignoreParameters and/or ignoreProperties is set to true (although how that behavior would be defined is a little murky, given that parameter properties are parameters and properties).