Regression test

Closes phpstan/phpstan#8473

Author: ondrejmirtes

tests/PHPStan/Rules/Generics/ClassAncestorsRuleTest.php

@@ -232,4 +232,9 @@ public function testScalarClassName(): void
 		$this->analyse([__DIR__ . '/data/scalar-class-name.php'], []);
 	}
 
+	public function testBug8473(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-8473.php'], []);
+	}
+
 }

tests/PHPStan/Rules/Generics/data/bug-8473.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Bug8473;
+
+/**
+ * @template TKey of int
+ * @template TValue
+ * @psalm-type PagesType = object{
+ *     test: int,
+ * }
+ */
+class Paginator
+{
+
+}
+
+/** @extends Paginator<int, AccountEntity> */
+class AccountCollection extends Paginator
+{
+}
+
+class AccountEntity
+{}