'#23674 -- invalid initial data should not break form.changed_data()'

def test_multivalue_initial_data(self):

    class DateAgeField(MultiValueField, ):
        def __init__(self, fields=(), *args, **kwargs):
            fields = (DateField(label='Date'), IntegerField(label='Age'))
            super().__init__(fields=fields, *args, **kwargs)
    class DateAgeForm(Form, ):
        date_age = DateAgeField()
    data = {'date_age': ['1998-12-06', 16]}
    form = DateAgeForm(data, initial={'date_age': ['200-10-10', 14]})
    self.assertTrue(form.has_changed())
