MAGETWO-45114: Custom option, checkbox, required - requires all options to be selected

Author: Andrii Lugovyi

app/code/Magento/Catalog/Block/Product/View/Options/Type/Select.php

@@ -142,7 +142,7 @@ public function getValuesHtml()
                     ' name="options[' .
                     $_option->getId() .
                     ']' .
-                    (!empty($arraySign) ? '[' . $htmlValue . ']' : '') .
+                    $arraySign .
                     '" id="options_' .
                     $_option->getId() .
                     '_' .

app/code/Magento/Wishlist/view/frontend/web/js/add-to-wishlist.js

@@ -89,7 +89,7 @@ define([
         },
         _getElementData: function(element) {
             var data = {},
-                elementName = $(element).attr('name'),
+                elementName = $(element).attr('id').replace(/[^_]+/, 'options').replace(/_(\d+)/g, '[$1]'),
                 elementValue = $(element).val();
             if ($(element).is('select[multiple]') && elementValue !== null) {
                 if (elementName.substr(elementName.length - 2) == '[]') {