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.

Playground Link

https://typescript-eslint.io/play/#ts=5.6.3&fileType=.ts&code=DYUwLgBAhhC8EEZoGcIDsCuBbARiAThAD4QZoAmIAZgJZojkDcAsAFBQCEA1F40A&eslintrc=N4KABGBEBOCuA2BTAzpAXGUEKQA7UQDNFoBaAYwHsA7ZAF3ShOkuknDAF8ROg&tsconfig=N4KABGBEDGD2C2AHAlgGwKYCcDyiAuysAdgM6QBcYoEEkJemy0eAcgK6qoDCAFutAGsylBm3TgwAXxCSgA&tokens=true

Repro Code

leta=1asnumber|undefined;a!++;

ESLint Config

module.exports={parser:"@typescript-eslint/parser",rules:{"prefer-const":"error",},};

tsconfig

No response

Expected Result

It should not error.

Actual Result

ESLint shows a message'a' is never reassigned. Use 'const' instead. 1:5 - 1:6

Additional Info

Similar to#2804