Casting ArrayObject to array should not lead to array shape

Author: ondrejmirtes

src/Type/ObjectType.php

@@ -3,6 +3,7 @@
 namespace PHPStan\Type;
 
 use ArrayAccess;
+use ArrayObject;
 use Closure;
 use Countable;
 use DateTime;
@@ -634,6 +635,7 @@ public function toArray(): Type
 
 		if (
 			!$classReflection->getNativeReflection()->isUserDefined()
+			|| $classReflection->is(ArrayObject::class)
 			|| UniversalObjectCratesClassReflectionExtension::isUniversalObjectCrate(
 				$reflectionProvider,
 				Broker::getInstance()->getUniversalObjectCratesClasses(),

tests/PHPStan/Analyser/nsrt/bug-12182.php

@@ -0,0 +1,19 @@
+<?php // lint >= 8.0
+
+namespace Bug12182;
+
+use ArrayObject;
+use function PHPStan\Testing\assertType;
+
+/**
+ * @extends ArrayObject<int, string>
+ */
+class HelloWorld extends ArrayObject
+{
+	public function __construct(private int $a = 42) {
+	}
+}
+
+function (HelloWorld $hw): void {
+	assertType('array', (array) $hw);
+};