Add name mangling test

Author: TimWolla

Zend/tests/clone/clone_with_011.phpt

@@ -0,0 +1,18 @@
+--TEST--
+Clone with name mangling
+--FILE--
+<?php
+
+class Foo {
+	private string $bar = 'default';
+}
+
+try {
+	var_dump(clone(new Foo(), ["\0Foo\0bar" => 'updated']));
+} catch (Throwable $e) {
+	echo $e::class, ": ", $e->getMessage(), PHP_EOL;
+}
+
+?>
+--EXPECT--
+Error: Cannot access property starting with "\0"