[TypeDeclaration] Fix return by variable anonymous on ReturnTypeFromReturnNewRector

rules-tests/TypeDeclaration/Rector/ClassMethod/ReturnTypeFromReturnNewRector/Fixture/return_anonymous_class_variable.php.inc

@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\TypeDeclaration\Rector\ClassMethod\ReturnTypeFromReturnNewRector\Fixture;
+
+final class ReturnAnonymousClassVariable
+{
+    public function action()
+    {
+        $data = new class
+        {
+            // any properties
+        };
+
+        // some bussines logic to fill the data
+
+        return $data;
+    }
+}
+
+?>
+-----
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\TypeDeclaration\Rector\ClassMethod\ReturnTypeFromReturnNewRector\Fixture;
+
+final class ReturnAnonymousClassVariable
+{
+    public function action(): object
+    {
+        $data = new class
+        {
+            // any properties
+        };
+
+        // some bussines logic to fill the data
+
+        return $data;
+    }
+}
+
+?>

rules/TypeDeclaration/NodeAnalyzer/ReturnTypeAnalyzer/StrictReturnNewAnalyzer.php

@@ -52,7 +52,12 @@ public function matchAlwaysReturnVariableNew(ClassMethod|Function_ $functionLike
                 return null;
             }
 
-            $returnType = $this->nodeTypeResolver->getType($return->expr);
+            $returnType = $this->nodeTypeResolver->getNativeType($return->expr);
+            if ($returnType instanceof \PHPStan\Type\ObjectWithoutClassType) {
+                $alwaysReturnedClassNames[] = 'object';
+                continue;
+            }
+
             if (! $returnType instanceof ObjectType) {
                 return null;
             }

rules/TypeDeclaration/Rector/ClassMethod/ReturnTypeFromReturnNewRector.php

@@ -6,6 +6,7 @@
 
 use PhpParser\Node;
 use PhpParser\Node\Expr\New_;
+use PhpParser\Node\Identifier;
 use PhpParser\Node\Name;
 use PhpParser\Node\Name\FullyQualified;
 use PhpParser\Node\Stmt\ClassMethod;
@@ -119,6 +120,11 @@ public function refactor(Node $node): ?Node
 
         $returnedNewClassName = $this->strictReturnNewAnalyzer->matchAlwaysReturnVariableNew($node);
 
+        if ($returnedNewClassName === 'object') {
+            $node->returnType = new Identifier('object');
+            return $node;
+        }
+
         if (is_string($returnedNewClassName)) {
             $node->returnType = new FullyQualified($returnedNewClassName);