Added regression test

Author: staabm

tests/PHPStan/Rules/Properties/MissingReadOnlyPropertyAssignRuleTest.php

@@ -392,6 +392,16 @@ public function testBug10048(): void
 		$this->analyse([__DIR__ . '/data/bug-10048.php'], []);
 	}
 
+	public function testBug11828(): void
+	{
+		if (PHP_VERSION_ID < 80100) {
+			$this->markTestSkipped('Test requires PHP 8.1.');
+		}
+
+		$this->shouldNarrowMethodScopeFromConstructor = true;
+		$this->analyse([__DIR__ . '/data/bug-11828.php'], []);
+	}
+
 	public function testBug9864(): void
 	{
 		if (PHP_VERSION_ID < 80100) {

tests/PHPStan/Rules/Properties/data/bug-11828.php

@@ -0,0 +1,31 @@
+<?php declare(strict_types = 1);
+
+namespace Bug11828;
+
+class Dummy
+{
+	/**
+	 * @var callable
+	 */
+	private $callable;
+	private readonly int $foo;
+
+	public function __construct(int $foo)
+	{
+		$this->foo = $foo;
+
+		$this->callable = function () {
+			$foo = $this->getFoo();
+		};
+	}
+
+	public function getFoo(): int
+	{
+		return $this->foo;
+	}
+
+	public function getCallable(): callable
+	{
+		return $this->callable;
+	}
+}