Merge branch '6.1' into 6.2

* 6.1:
  [String] Fix snake conversion
  [DowCrawler] Fix locale-sensitivity of whitespace normalization
  suggest to install the Twig bundle when the required component is already installed
  Update PULL_REQUEST_TEMPLATE.md
  [Serializer] Fix throwing right exception in ArrayDenormalizer with invalid type

Author: derrabus

Normalizer/ArrayDenormalizer.php

@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Serializer\Normalizer;
 
+use Symfony\Component\PropertyInfo\Type;
 use Symfony\Component\Serializer\Exception\BadMethodCallException;
 use Symfony\Component\Serializer\Exception\InvalidArgumentException;
 use Symfony\Component\Serializer\Exception\NotNormalizableValueException;
@@ -37,7 +38,7 @@ public function denormalize(mixed $data, string $type, string $format = null, ar
             throw new BadMethodCallException('Please set a denormalizer before calling denormalize()!');
         }
         if (!\is_array($data)) {
-            throw new InvalidArgumentException('Data expected to be an array, '.get_debug_type($data).' given.');
+            throw NotNormalizableValueException::createForUnexpectedDataType(sprintf('Data expected to be "%s", "%s" given.', $type, get_debug_type($data)), $data, [Type::BUILTIN_TYPE_ARRAY], $context['deserialization_path'] ?? null);
         }
         if (!str_ends_with($type, '[]')) {
             throw new InvalidArgumentException('Unsupported class: '.$type);

Tests/Fixtures/Php74Full.php

@@ -31,6 +31,8 @@ final class Php74Full
     public DummyMessageInterface $dummyMessage;
     /** @var TestFoo[] $nestedArray */
     public TestFoo $nestedObject;
+    /** @var Php74Full[] */
+    public $anotherCollection;
 }
 
 

Tests/SerializerTest.php

@@ -866,7 +866,8 @@ public function testCollectDenormalizationErrors(?ClassMetadataFactory $classMet
             },
             "nestedObject": {
                 "int": "string"
-            }
+            },
+            "anotherCollection": null
         }';
 
         $extractor = new PropertyInfoExtractor([], [new PhpDocExtractor(), new ReflectionExtractor()]);
@@ -1042,6 +1043,13 @@ public function testCollectDenormalizationErrors(?ClassMetadataFactory $classMet
                 'useMessageForUser' => true,
                 'message' => 'The type of the key "int" must be "int" ("string" given).',
             ],
+            [
+                'currentType' => 'null',
+                'expectedTypes' => ['array'],
+                'path' => 'anotherCollection',
+                'useMessageForUser' => false,
+                'message' => 'Data expected to be "Symfony\Component\Serializer\Tests\Fixtures\Php74Full[]", "null" given.',
+            ],
         ];
 
         $this->assertSame($expected, $exceptionsAsArray);