Added regression tests (#5425)

Author: staabm

tests/PHPStan/Analyser/AnalyserIntegrationTest.php

@@ -1506,6 +1506,13 @@ public function testBug13801(): void
 		$this->assertNoErrors($errors);
 	}
 
+	public function testBug8835(): void
+	{
+		// endless loop crash
+		$errors = $this->runAnalyse(__DIR__ . '/data/bug-8835.php');
+		$this->assertNoErrors($errors);
+	}
+
 	/**
 	 * @param string[]|null $allAnalysedFiles
 	 * @return list<Error>

tests/PHPStan/Analyser/data/bug-8835.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Bug8835;
+
+/** @template T */
+interface I
+{
+}
+
+/** @implements I<self::X> */
+class B implements I
+{
+	const X = 'x';
+}