GH-22000 - add test

Author: zaaarf

ext/reflection/tests/gh22000.phpt

@@ -0,0 +1,39 @@
+--TEST--
+GH-22000 - Ensure __isset is not returning a reference in ReflectionProperty::isReadable()
+--FILE--
+<?php
+class TestClass {
+    public int $a;
+    public int $b;
+    public int $c;
+
+    public function __construct() {
+        unset($this->b);
+        unset($this->c);
+    }
+
+    public function &__isset($name) {
+        return $name === 'c';
+    }
+
+    public function __get($name) {}
+}
+
+
+function test($class) {
+    try {
+        $rc = new ReflectionClass($class);
+        foreach ($rc->getProperties() as $rp) {
+            echo $rp->getName() . ' from global: ';
+            var_dump($rp->isReadable(null, new $class));
+        }
+    } catch(\Exception $ex) {
+        echo $ex->getMessage();
+    }
+}
+
+test('TestClass');
+?>
+--EXPECTF--
+a from global: bool(false)
+b from global: __isset should not return a reference