Fix phpstan/phpstan#13380: Promoting protected property to public in subclass generates uninitialized property

src/Node/ClassPropertiesNode.php

@@ -132,6 +132,12 @@
 			}
 			$originalProperties[$property->getName()] = $property;
 			$is = TrinaryLogic::createFromBoolean($property->isPromoted() && !$property->isPromotedFromTrait());
+			if (!$is->yes() && $classReflection->hasConstructor()) {
+				$constructorDeclaringClass = $classReflection->getConstructor()->getDeclaringClass();
+				if ($constructorDeclaringClass->getName() !== $classReflection->getName()) {
+					$is = $this->isPropertyInitializedByConstructorChain($constructorDeclaringClass, $property->getName());
+				}
+			}
 			if (!$is->yes() && $classReflection->hasNativeProperty($property->getName())) {
 				$propertyReflection = $classReflection->getNativeProperty($property->getName());
 				if ($propertyReflection->isVirtual()->yes()) {
@@ -419,4 +425,46 @@
 		return $this->propertyAssigns;
 	}
 
+	private function isPropertyInitializedByConstructorChain(ClassReflection $constructorDeclaringClass, string $propertyName): TrinaryLogic
+	{
+		$ancestor = $constructorDeclaringClass;
+		do {
+			$ancestorConstructor = $ancestor->getNativeReflection()->getConstructor();
+			if ($ancestorConstructor !== null) {
+				foreach ($ancestorConstructor->getParameters() as $param) {
+					if ($param->getName() === $propertyName && $param->isPromoted()) {
+						return TrinaryLogic::createYes();
+					}
+				}
+			}
+
+			$parent = $ancestor->getParentClass();
+			if ($parent === null) {
+				break;
+			}
+
+			$hasOwnConstructor = $ancestor->hasConstructor()
+				&& $ancestor->getConstructor()->getDeclaringClass()->getName() === $ancestor->getName();
+
+			if ($hasOwnConstructor) {
+				$hasMatchingParam = false;
+				if ($ancestorConstructor !== null) {
+					foreach ($ancestorConstructor->getParameters() as $param) {
+						if ($param->getName() === $propertyName) {
+							$hasMatchingParam = true;
+							break;
+						}
+					}
+				}
+				if (!$hasMatchingParam) {
+					break;
+				}
+			}
+
+			$ancestor = $parent;
+		} while (true);
+
+		return TrinaryLogic::createNo();
+	}
+
 }

tests/PHPStan/Rules/Properties/UninitializedPropertyRuleTest.php

@@ -233,4 +233,18 @@ public function testBug12547(): void
 		$this->analyse([__DIR__ . '/data/bug-12547.php'], []);
 	}
 
+	public function testBug13380(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-13380.php'], [
+			[
+				'Class Bug13380\Baz has an uninitialized property $prop. Give it default value or assign it in the constructor.',
+				33,
+			],
+			[
+				'Class Bug13380\Baz3 has an uninitialized property $prop. Give it default value or assign it in the constructor.',
+				57,
+			],
+		]);
+	}
+
 }

tests/PHPStan/Rules/Properties/data/bug-13380.php

@@ -0,0 +1,58 @@
+<?php // lint >= 8.0
+
+declare(strict_types = 1);
+
+namespace Bug13380;
+
+class Foo
+{
+	public function __construct(
+		protected string $prop,
+	){
+	}
+}
+
+class Bar extends Foo {
+	public string $prop;
+}
+
+class Bar2 extends Foo
+{
+	public function __construct(
+		string $prop,
+	){
+		parent::__construct($prop);
+	}
+}
+
+class Baz2 extends Bar2 {
+	public string $prop;
+}
+
+class Baz extends Foo {
+	public string $prop;
+
+	public function __construct()
+	{
+		// Does not call parent::__construct, so $prop is uninitialized
+	}
+}
+
+class Foo3
+{
+	public function __construct(
+		protected string $prop,
+	){
+	}
+}
+
+class Bar3 extends Foo3
+{
+	public function __construct()
+	{
+	}
+}
+
+class Baz3 extends Bar3 {
+	public string $prop;
+}