We have a condition_dict containing the following function:

def need_further_steps(wizard):
    data = wizard.get_cleaned_data_for_step("0") or {}
    if data.get("no_invoices_needed", False):
        return False
    return True

The call to WizardView.get_cleaned_data_for_step then calls WizardView.get_form, which used to reference self.form_list, but the following commit changes this to self.get_form_list(), which then calls the user-supplied condition_dict functions, which then calls our need_further_steps function above, which calls WizardView.get_cleaned_data_for_step, and so on ad infinitum.
533a830

Perhaps our custom condition function is bad, but it doesn't seem too unreasonable?