Form with IntegerRangeField does not validate

[George Tantiras]

In a fresh Django installation:

from django import forms
from django.contrib.postgres.forms import IntegerRangeField
from psycopg2.extras import NumericRange


class A(forms.Form):
    lifespan = IntegerRangeField(required=True)


>>> data = {'lifespan': NumericRange(1918, 1999)} 
>>> p = A(data=data)
>>> p.data
{'lifespan': NumericRange(1918, 1999, '[)')}
>>> p.is_valid()
False
>>> p.errors
{'lifespan': ['This field is required.']}
>>> p.cleaned_data
{}

I discovered this behaviour while trying to test the clean method of a ModelForm with this field.