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=5.7.2&fileType=.tsx&code=PTAEHUEMCcDsGdSQEYHsCuAXUBLWA3SAGxwBNRUAHAU2kllPgCgjrsAzWAOXQFtlaoALygAFJABcoWHwHQANKGRT4maHgDmASmEA%2BJKADUSgNxMQoACKpq8WAHJsAdxiwWbUJwBCODXmwi4lLIvv6KyqCq6rDaegbGyCZAA&eslintrc=N4KABGBEBOCuA2BTAzpAXGUEKQAIBcBPABxQGNoBLY-AWhXkoDt8B6aFfKsu4%2BWZLQD2paAEMmAE1QYA2uGw5E0aEOiQANAsVZFeyGPjwhAdwBysALYAjZQEEpAZS7MA5ujAAzQ8kTbsAL7%2BALoKQQFAA&tsconfig=N4KABGBEDGD2C2AHAlgGwKYCcDyiAuysAdgM6QBcYoEEkJemy0eAcgK6qoDCAFutAGsylBm3TgwAXxCSgA&tokens=false

Repro Code

// Warns about invalid operandsletfnNumber=(a:number,b:string)=>a+b;// Doesn't warnletfnBigint=(a:bigint,b:string)=>a+b;

ESLint Config

{"rules":{"@typescript-eslint/restrict-plus-operands":["error",{"allowNumberAndString":false}]}}

tsconfig

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

Expected Result

I expected that the 4th line should report the error "Operands of '+' operations must be a number or string, allowing a string + any of:any,boolean,null,RegExp,undefined. Gotbigint +string."

The docs forallowNumberAndString specifically mention supportingbigint:

Whether to allow bigint/number typed values and string typed values to be added together.

Actual Result

There was no error on the 4th line.

Additional Info

Inrestrict-plus-operands.ts, line221 should compareotherType tots.TypeFlags.NumberLike | ts.TypeFlags.BigIntLike instead of justts.TypeFlags.NumberLike.