Issue with catchError

[NarHakobyan]

Describe the bug

Type declaration of catchError has been changed and caught was marked as required

export function catchError<T, O extends ObservableInput<any>>(
  selector: (err: any, caught: Observable<T>) => O
): OperatorFunction<T, T | ObservedValueOf<O>>;

it breaks code where catchError receives only error as argument

Expected behavior

caught must be optional so code like will work

catchError((err: Error) => {

            return throwError(
              () => err,
            );
          })

Reproduction code

No response

Reproduction URL

No response

Version

7.8.1

Environment

No response

Additional context

No response

[benlesh]

I'm unable to reproduce this. It seems to work with the latest RxJS and TypeScript:

https://www.typescriptlang.org/play?noUnusedLocals=true&noUnusedParameters=true&useUnknownInCatchVariables=true&exactOptionalPropertyTypes=true#code/JYWwDg9gTgLgBAbzhAZgGjgYwIY0wCwFEopoMZ9SB3Y0qOAXzhVJDgHIoAPAKwGd2AbgCwAKDGoAFAEYMAJgwBmAJQA6MMDABTSWLj6suArWiTJWksrgBeAHyI9Bp1C0wArlAB2cCtRNQzKzs4CyhlEVEnBmUxZSA