Fix build

Author: ondrejmirtes

tests/PHPStan/Analyser/AnalyserIntegrationTest.php

@@ -509,12 +509,9 @@ public function testBug6255(): void
 	public function testBug6300(): void
 	{
 		$errors = $this->runAnalyse(__DIR__ . '/data/bug-6300.php');
-		$this->assertCount(2, $errors);
+		$this->assertCount(1, $errors);
 		$this->assertSame('Call to an undefined method Bug6300\Bar::get().', $errors[0]->getMessage());
-		$this->assertSame(23, $errors[0]->getLine());
-
-		$this->assertSame('Access to an undefined property Bug6300\Bar::$fooProp.', $errors[1]->getMessage());
-		$this->assertSame(24, $errors[1]->getLine());
+		$this->assertSame(27, $errors[0]->getLine());
 	}
 
 	public function testBug6466(): void

tests/PHPStan/Analyser/data/bug-6300.php

@@ -2,9 +2,12 @@
 
 namespace Bug6300;
 
+use AllowDynamicProperties;
+
 /**
  * @mixin Bar
  */
+#[AllowDynamicProperties]
 class Foo
 {
 
@@ -13,6 +16,7 @@ class Foo
 /**
  * @mixin Foo
  */
+#[AllowDynamicProperties]
 class Bar
 {