fix(stub): 修复异常处理并支持属性默认值中的new操作

- 在RuntimeException中添加堆栈跟踪信息输出
- 新增对属性默认值为new表达式的处理逻辑
- 添加测试用例验证nullable类型属性的处理
- 支持构造函数参数中使用new操作符作为默认值

src/gen_stub.php

@@ -148,7 +148,7 @@ function processStubFile(string $stubFile, Context $context, bool $includeOnly =
 
         return $fileInfo;
     } catch (Exception $e) {
-        throw new RuntimeException("In " . getTranslator()->getRelativePath($stubFile) . ": {$e->getMessage()}");
+        throw new RuntimeException("In " . getTranslator()->getRelativePath($stubFile) . ": {$e->getMessage()}\n". $e->getTraceAsString());
     }
 }
 
@@ -3246,7 +3246,8 @@ class PropertyInfo extends VariableLike
 
         $propertyName = $this->name->getDeclarationName();
 
-        if ($this->defaultValue === null) {
+        // New 操作作为属性的默认值，需编译器处理 gen_stub 作为 null 值
+        if ($this->defaultValue === null || $this->defaultValue instanceof Expr\New_) {
             $defaultValue = EvaluatedValue::null();
         } else {
             $defaultValue = EvaluatedValue::createFromExpression($this->defaultValue, null, null, $allConstInfos);

tests/aot/object_property/prop-005.phpt

@@ -0,0 +1,48 @@
+--TEST--
+Property with nullable type
+--FILE--
+<?php
+class Router { function dispatch() { echo "router\n"; } }
+class SessionManager { function start() { echo "SessionManager\n"; } }
+class CsrfGuard { function validate() { echo "CsrfGuard\n"; } }
+class Handler {
+    private string $name;
+    public function __construct(string $name) {
+        $this->name = $name;
+    }
+    function handleError() {
+        echo $this->name . "\n";
+    }
+}
+class SpaRenderer { function render() { echo "SpaRenderer\n"; } }
+
+class App {
+    public function __construct(
+        private Router $router,
+        private SessionManager $sessions = new SessionManager(),
+        private CsrfGuard $csrf = new CsrfGuard(),
+        private Handler $errors = new Handler('Handler'),
+        private SpaRenderer $spa = new SpaRenderer(),
+    ) {}
+
+    public function run() {
+        $this->router->dispatch();
+        $this->sessions->start();
+        $this->csrf->validate();
+        $this->errors->handleError();
+        $this->spa->render();
+    }
+}
+
+function main()
+{
+    $app = new App(new Router());
+    $app->run();
+}
+?>
+--EXPECT--
+router
+SessionManager
+CsrfGuard
+Handler
+SpaRenderer