Is expected behavior of flask_restful abort() correct ?

Hi. Sorry to post this here - completely new to flask-restful, but ...

From the docs, I expected that flask-restful arg_parse() would return an http page with error code (e.g., 400) + any error messages accumulated while parsing the query string.

However, the error messages do not appear.

I can see that the error messages are accumulating correctly in reqparse.py (e.g., handle_validation_error with bundle_errors=True).

When I look at the flask-restful.abort(), I don't understand how this is meant to work: Inside__init__.py:

def abort(http_status_code, **kwargs):
    """Raise a HTTPException for the given http_status_code. Attach any keyword
    arguments to the exception for later processing.
    """
    #noinspection PyUnresolvedReferences
    try:
        original_flask_abort(http_status_code)
    except HTTPException as e:
        if len(kwargs):
            e.data = kwargs
        raise

To me, it looks like you return an original flask abort page with no message, and then raise the flask-restful error message as an exception. How is this meant to work ?

e.g., if I just try to do: import flask_restful flask_restful.abort(400, message={'field1': 'this is required', 'field2': 'got a bad value'})

My understanding from the docs is that this should be all that is required to return html with error messages, but it does not.

Thanks!!