Add a typed property test

tests/typed_prop.phpt

@@ -0,0 +1,35 @@
+--TEST--
+Success parameters should respect property types
+--SKIPIF--
+<?php
+require_once(dirname(__FILE__) . '/skipif.inc');
+version_compare(PHP_VERSION, '7.4.0dev', '>=') or die('skip Requires PHP >= 7.4');
+?>
+--INI--
+apc.enabled=1
+apc.enable_cli=1
+--FILE--
+<?php
+
+class Test {
+    public bool $bool = false;
+    public array $array = [];
+}
+
+$test = new Test;
+apcu_store('foo', 'bar');
+apcu_fetch('foo', $test->bool);
+var_dump($test->bool);
+try {
+    apcu_fetch('foo', $test->array);
+} catch (Error $e) {
+    echo $e->getMessage(), "\n";
+}
+var_dump($test->array);
+
+?>
+--EXPECT--
+bool(true)
+Cannot assign bool to reference held by property Test::$array of type array
+array(0) {
+}