Regression tests

Closes phpstan/phpstan#10771

Author: ondrejmirtes

tests/PHPStan/Rules/Methods/ReturnTypeRuleTest.php

@@ -1286,4 +1286,9 @@ public function testBug8438(): void
 		$this->analyse([__DIR__ . '/data/bug-8438.php'], []);
 	}
 
+	public function testBug10771(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-10771.php'], []);
+	}
+
 }

tests/PHPStan/Rules/Methods/data/bug-10771.php

@@ -0,0 +1,58 @@
+<?php
+
+namespace Bug10771;
+
+/**
+ * @template T of Template
+ *
+ * @extends B<T>
+ */
+class A extends B
+{
+	/**
+	 * @return class-string<T>
+	 */
+	public function getClassString(): string
+	{
+		return static::ENTITY;
+	}
+}
+
+/**
+ * @template T of Template
+ */
+class B
+{
+	/** @var class-string<T> */
+	public const ENTITY = Template::class;
+}
+
+class Template
+{
+
+}
+
+/**
+ * @template TA of Template
+ *
+ * @extends Bb<TA>
+ */
+class Aa extends Bb
+{
+	/**
+	 * @return class-string<TA>
+	 */
+	public function getClassString(): string
+	{
+		return static::ENTITY;
+	}
+}
+
+/**
+ * @template TB of Template
+ */
+class Bb
+{
+	/** @var class-string<TB> */
+	public const ENTITY = Template::class;
+}