Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/symfony/validator/Constraints/LessThanOrEqualValidator.php

@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Constraints;
+
+/**
+ * Validates values are less than or equal to the previous (<=).
+ *
+ * @author Daniel Holmes <daniel@danielholmes.org>
+ */
+class LessThanOrEqualValidator extends AbstractComparisonValidator
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function compareValues($value1, $value2)
+    {
+        return $value1 <= $value2;
+    }
+}