Merge branch '4.1'

* 4.1: (27 commits)
  Added the Code of Conduct file
  do not override custom access decision configs
  [Security] Do not deauthenticate user when the first refreshed user has changed
  fix a return type hint
  invalidate stale commits for PRs too
  add missing cache prefix seed attribute to XSD
  fix command description
  Fix class documentation
  [Validator] Add a missing translation
  [FrameworkBundle] Fix 3.4 tests
  [DI] fix dumping inline services again
  Rename consumer to receiver
  Register messenger before the profiler
  Fix phpdocs
  [EventDispatcher] Remove template method in test case
  Added LB translation for #27993 (UUID validator message translation)
  Replace deprecated validateValue with validate
  [FWBundle] Automatically enable PropertyInfo when using Flex
  [Process] fix locking of pipe files on Windows
  Correct PHPDoc type for float ttl
  ...

Author: nicolas-grekas

Extension/Core/DataTransformer/DateTimeToRfc3339Transformer.php

@@ -68,7 +68,7 @@ public function reverseTransform($rfc3339)
             return;
         }
 
-        if (!preg_match('/^(\d{4})-(\d{2})-(\d{2})T\d{2}:\d{2}(?::\d{2})?(?:\.\d)?(?:Z|(?:(?:\+|-)\d{2}:\d{2}))$/', $rfc3339, $matches)) {
+        if (!preg_match('/^(\d{4})-(\d{2})-(\d{2})T\d{2}:\d{2}(?::\d{2})?(?:\.\d+)?(?:Z|(?:(?:\+|-)\d{2}:\d{2}))$/', $rfc3339, $matches)) {
             throw new TransformationFailedException(sprintf('The date "%s" is not a valid date.', $rfc3339));
         }
 

FormBuilder.php

@@ -235,9 +235,9 @@ public function getIterator()
     }
 
     /**
-     * Converts an unresolved child into a {@link FormBuilder} instance.
+     * Converts an unresolved child into a {@link FormBuilderInterface} instance.
      */
-    private function resolveChild(string $name): self
+    private function resolveChild(string $name): FormBuilderInterface
     {
         $info = $this->unresolvedChildren[$name];
         $child = $this->create($name, $info['type'], $info['options']);

Tests/Extension/Core/DataTransformer/DateTimeToRfc3339TransformerTest.php

@@ -67,6 +67,7 @@ public function reverseTransformProvider()
             array('UTC', 'UTC', '2010-02-03 04:05:00 UTC', '2010-02-03T04:05Z'),
             array('America/New_York', 'Asia/Hong_Kong', '2010-02-03 04:05:00 America/New_York', '2010-02-03T17:05+08:00'),
             array('Europe/Amsterdam', 'Europe/Amsterdam', '2013-08-21 10:30:00 Europe/Amsterdam', '2013-08-21T08:30:00Z'),
+            array('UTC', 'UTC', '2018-10-03T10:00:00.000Z', '2018-10-03T10:00:00.000Z'),
         ));
     }
 

Tests/FormBuilderTest.php

@@ -13,7 +13,9 @@
 
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\ButtonBuilder;
+use Symfony\Component\Form\Extension\Core\Type\SubmitType;
 use Symfony\Component\Form\FormBuilder;
+use Symfony\Component\Form\FormFactoryBuilder;
 use Symfony\Component\Form\SubmitButtonBuilder;
 
 class FormBuilderTest extends TestCase
@@ -228,6 +230,14 @@ public function testGetFormConfigErasesReferences()
         $this->assertEmpty($unresolvedChildren->getValue($config));
     }
 
+    public function testGetButtonBuilderBeforeExplicitlyResolvingAllChildren()
+    {
+        $builder = new FormBuilder('name', null, $this->dispatcher, (new FormFactoryBuilder())->getFormFactory());
+        $builder->add('submit', SubmitType::class);
+
+        $this->assertInstanceOf(ButtonBuilder::class, $builder->get('submit'));
+    }
+
     private function getFormBuilder($name = 'name')
     {
         $mock = $this->getMockBuilder('Symfony\Component\Form\FormBuilder')