Prevent deprecation warning when parsing some anonymous classes.

Fixes #867

Author: bobthecow

src/CodeCleaner/ValidConstructorPass.php

@@ -69,7 +69,7 @@ public function enterNode(Node $node)
                     }
 
                     // We found a possible old-style constructor (unless there is also a __construct method)
-                    if (empty($this->namespace) && \strtolower($node->name) === \strtolower($stmt->name)) {
+                    if (empty($this->namespace) && $node->name !== null && \strtolower($node->name) === \strtolower($stmt->name)) {
                         $constructor = $stmt;
                     }
                 }

test/CodeCleaner/ValidConstructorPassTest.php

@@ -90,4 +90,22 @@ public function validStatements()
             ['namespace B; class A { private static function A(): ?array {}}'],
         ];
     }
+
+    /**
+     * @dataProvider anonymousClasses
+     */
+    public function testAnonymousClasses($code)
+    {
+        $this->parseAndTraverse($code);
+        $this->assertTrue(true);
+    }
+
+    public function anonymousClasses()
+    {
+        return [
+            ['new class() { public function __construct() {} }'],
+            ['new class() { public function f(): void {} }'],
+            ['new class() { private function f(): void {} public function __construct() {} }'],
+        ];
+    }
 }