test(php): 添加标准容器静态类匹配测试用例

- 添加 testStdContainerStaticClassMismatch 测试方法验证对象分配错误
- 更新 StdContainerParser 中的 fatal error 消息格式保持一致性

phpunit/src/AssignTest.php

@@ -11,4 +11,12 @@ class AssignTest extends \BaseTest
     {
         $this->exec('Cannot re-assign typed object `$obj1` from `stdClass` to `ArrayObject`', 're-assign-2.php');
     }
+
+    public function testStdContainerStaticClassMismatch()
+    {
+        $this->exec(
+            'Cannot assign object of class `StdContainerStaticChild` to std container value of class `StdContainerStaticBase`',
+            'std-container-static-class-mismatch.php'
+        );
+    }
 }

src/Php/Parser/StdContainerParser.php

@@ -339,10 +339,9 @@ trait StdContainerParser
             if ($rightClass !== $class) {
                 $this->fatalError($expr, "Cannot assign object of class `{$rightClass}` to std container value of class `{$class}`");
             }
-            return $this->convertObjectExpr($valueExpr);
         }
 
-        return  'php::toObject(' . $valueExpr . ', ' . $this->getClassEntryPtr($class). ', true)';
+        return 'php::toObject(' . $valueExpr . ', ' . $this->getClassEntryPtr($class) . ', true)';
     }
 
     protected function parseStdMapKeyType(NodeAbstract $expr, string $owner): string