Merge branch '2.3' into 2.7

* 2.3:
  [Request] Ignore invalid IP addresses sent by proxies
  Able to load big xml files with DomCrawler
  fixed typo
  [Form] Fix constraints could be null if not set
  [Finder] Check PHP version before applying a workaround for a PHP bug
  fixed CS
  sort bundles in config:dump-reference command
  Fixer findings.

Author: fabpot

Extension/Validator/Constraints/FormValidator.php

@@ -61,7 +61,7 @@ public function validate($form, Constraint $constraint)
 
             // Validate the data against the constraints defined
             // in the form
-            $constraints = $config->getOption('constraints');
+            $constraints = $config->getOption('constraints', array());
             foreach ($constraints as $constraint) {
                 foreach ($groups as $group) {
                     if (in_array($group, $constraint->groups)) {

Tests/Extension/HttpFoundation/HttpFoundationRequestHandlerTest.php

@@ -28,6 +28,7 @@ public function testRequestShouldNotBeNull()
     {
         $this->requestHandler->handleRequest($this->getMockForm('name', 'GET'));
     }
+
     /**
      * @expectedException \Symfony\Component\Form\Exception\UnexpectedTypeException
      */

Tests/Extension/Validator/Constraints/FormValidatorTest.php

@@ -129,6 +129,17 @@ public function testDontValidateIfParentWithoutCascadeValidation()
         $this->assertNoViolation();
     }
 
+    public function testMissingConstraintIndex()
+    {
+        $object = new \stdClass();
+        $form = new FormBuilder('name', '\stdClass', $this->dispatcher, $this->factory);
+        $form = $form->setData($object)->getForm();
+
+        $this->validator->validate($form, new Form());
+
+        $this->assertNoViolation();
+    }
+
     public function testValidateConstraintsEvenIfNoCascadeValidation()
     {
         $object = $this->getMock('\stdClass');