<?php

/* implementation of hook_menu() */
function bug_example_menu(){
    $items = array();
    $items['radiosrequired'] = array(
        'page callback' => 'drupal_get_form',
        'page arguments' => array('bug_example_radiosrequired_form'),
        'access callback' => true,
        'type' => MENU_SUGGESTED_ITEM,
        'title' => 'Example form: radios required',
    );
    return $items;
}

function bug_example_radiosrequired_form ($form, &$form_state) {

    $form['description'] = array(
        '#type' => 'item',
        '#title' => "Demo: required radio group returns weird generic validation error message if nothing picked",
    );
    
    $form['oopsie'] = array(
        '#type' => 'radios',
        '#title' => "Pick one",
        '#description' => "If you don't pick one, I'll give you a very vague error messa.",
        '#options' => array(
           // 0 => '(none)',
           'A' => "First option", 
           'B' => "Second option"
        ),
        '#required' => true
    );

    $form['name'] = array(
        "#title" => "Name",
        '#description' => "No problem here.",
        "#type" => "textfield",
        "#required" => true,
    );

    $form['submit'] = array(
        '#type' => 'submit',
        '#value' => 'Submit'
    );

    return $form;
}

function bug_example_radiosrequired_form_submit ($form, &$form_state) {
    drupal_set_message('Your form submission has been accepted.');
}