Merge branch '3.4' into 4.4

* 3.4:
  [Yaml] Fix for #36624; Allow PHP constant as first key in block
  Use PHPUnit 9.3 on php 8.
  fix mapping errors from unmapped forms
  [Validator] Add target guards for Composite nested constraints

Author: fabpot

Extension/Validator/ViolationMapper/ViolationMapper.php

@@ -231,13 +231,6 @@ private function reconstructPath(ViolationPath $violationPath, FormInterface $or
                 // Form inherits its parent data
                 // Cut the piece out of the property path and proceed
                 $propertyPathBuilder->remove($i);
-            } elseif (!$scope->getConfig()->getMapped()) {
-                // Form is not mapped
-                // Set the form as new origin and strip everything
-                // we have so far in the path
-                $origin = $scope;
-                $propertyPathBuilder->remove(0, $i + 1);
-                $i = 0;
             } else {
                 /* @var \Symfony\Component\PropertyAccess\PropertyPathInterface $propertyPath */
                 $propertyPath = $scope->getPropertyPath();

Tests/Extension/Validator/ViolationMapper/Fixtures/Issue.php

@@ -0,0 +1,16 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Form\Tests\Extension\Validator\ViolationMapper\Fixtures;
+
+class Issue
+{
+}

Tests/Extension/Validator/ViolationMapper/ViolationMapperTest.php

@@ -22,6 +22,7 @@
 use Symfony\Component\Form\FormConfigBuilder;
 use Symfony\Component\Form\FormError;
 use Symfony\Component\Form\FormInterface;
+use Symfony\Component\Form\Tests\Extension\Validator\ViolationMapper\Fixtures\Issue;
 use Symfony\Component\PropertyAccess\PropertyPath;
 use Symfony\Component\Validator\ConstraintViolation;
 use Symfony\Component\Validator\ConstraintViolationInterface;
@@ -70,12 +71,12 @@ protected function setUp(): void
         $this->params = ['foo' => 'bar'];
     }
 
-    protected function getForm($name = 'name', $propertyPath = null, $dataClass = null, $errorMapping = [], $inheritData = false, $synchronized = true)
+    protected function getForm($name = 'name', $propertyPath = null, $dataClass = null, $errorMapping = [], $inheritData = false, $synchronized = true, array $options = [])
     {
         $config = new FormConfigBuilder($name, $dataClass, $this->dispatcher, [
             'error_mapping' => $errorMapping,
-        ]);
-        $config->setMapped(true);
+        ] + $options);
+        $config->setMapped(isset($options['mapped']) ? $options['mapped'] : true);
         $config->setInheritData($inheritData);
         $config->setPropertyPath($propertyPath);
         $config->setCompound(true);
@@ -91,12 +92,9 @@ function () { throw new TransformationFailedException(); }
         return new Form($config);
     }
 
-    /**
-     * @param $propertyPath
-     */
-    protected function getConstraintViolation($propertyPath): ConstraintViolation
+    protected function getConstraintViolation($propertyPath, $root = null): ConstraintViolation
     {
-        return new ConstraintViolation($this->message, $this->messageTemplate, $this->params, null, $propertyPath, null);
+        return new ConstraintViolation($this->message, $this->messageTemplate, $this->params, $root, $propertyPath, null);
     }
 
     protected function getFormError(ConstraintViolationInterface $violation, FormInterface $form): FormError
@@ -107,6 +105,33 @@ protected function getFormError(ConstraintViolationInterface $violation, FormInt
         return $error;
     }
 
+    public function testMappingErrorsWhenFormIsNotMapped()
+    {
+        $form = $this->getForm('name', null, Issue::class, [
+            'child1' => 'child2',
+        ]);
+
+        $violation = $this->getConstraintViolation('children[child1].data', $form);
+
+        $child1Form = $this->getForm('child1', null, null, [], false, true, [
+            'mapped' => false,
+        ]);
+        $child2Form = $this->getForm('child2', null, null, [], false, true, [
+            'mapped' => false,
+        ]);
+
+        $form->add($child1Form);
+        $form->add($child2Form);
+
+        $form->submit([]);
+
+        $this->mapper->mapViolation($violation, $form);
+
+        $this->assertCount(0, $form->getErrors());
+        $this->assertCount(0, $form->get('child1')->getErrors());
+        $this->assertCount(1, $form->get('child2')->getErrors());
+    }
+
     public function testMapToFormInheritingParentDataIfDataDoesNotMatch()
     {
         $violation = $this->getConstraintViolation('children[address].data.foo');