From a5f779ca417619d9cd598cba46638b64cd3e6c77 Mon Sep 17 00:00:00 2001
From: Mathias Arlaud <mathias.arlaud@gmail.com>
Date: Thu, 20 Feb 2025 12:25:33 +0100
Subject: [PATCH] [TypeInfo] Fix create union with nullable type

---
 src/Symfony/Component/TypeInfo/Tests/TypeFactoryTest.php | 4 ++++
 src/Symfony/Component/TypeInfo/TypeFactoryTrait.php      | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/src/Symfony/Component/TypeInfo/Tests/TypeFactoryTest.php b/src/Symfony/Component/TypeInfo/Tests/TypeFactoryTest.php
index 60a0ded22c648..50a6f5a2e6449 100644
--- a/src/Symfony/Component/TypeInfo/Tests/TypeFactoryTest.php
+++ b/src/Symfony/Component/TypeInfo/Tests/TypeFactoryTest.php
@@ -205,5 +205,9 @@ public function testCreateNullable()
             new NullableType(new UnionType(new BuiltinType(TypeIdentifier::INT), new BuiltinType(TypeIdentifier::STRING))),
             Type::nullable(Type::union(Type::int(), Type::string(), Type::null())),
         );
+        $this->assertEquals(
+            new NullableType(new UnionType(new BuiltinType(TypeIdentifier::INT), new BuiltinType(TypeIdentifier::STRING))),
+            Type::union(Type::nullable(Type::int()), Type::string()),
+        );
     }
 }
diff --git a/src/Symfony/Component/TypeInfo/TypeFactoryTrait.php b/src/Symfony/Component/TypeInfo/TypeFactoryTrait.php
index d32a97276057c..b8e15f209fa00 100644
--- a/src/Symfony/Component/TypeInfo/TypeFactoryTrait.php
+++ b/src/Symfony/Component/TypeInfo/TypeFactoryTrait.php
@@ -266,6 +266,13 @@ public static function union(Type ...$types): UnionType
         $isNullable = fn (Type $type): bool => $type instanceof BuiltinType && TypeIdentifier::NULL === $type->getTypeIdentifier();
 
         foreach ($types as $type) {
+            if ($type instanceof NullableType) {
+                $nullableUnion = true;
+                $unionTypes[] = $type->getWrappedType();
+
+                continue;
+            }
+
             if ($type instanceof UnionType) {
                 foreach ($type->getTypes() as $unionType) {
                     if ($isNullable($type)) {