Laravel5.2 最新框架 控制器调用模板出错 Maximum function nesting level of '100' reached, aborting!

代码如下：
①路由规则
Route::get('/index', 'IndexController@index');

②index控制器：
class IndexController extends Controller
{
public function index() {
return view('welcome');
}
}
竟然如下的错误，新手表示不解，希望有人知道是什么原因。或者推荐个错误调试工具，laravel的错误提示实在是不好调试。
Whoops, looks like something went wrong. 1/1
FatalErrorException in PhpEngine.php line 10:
Maximum function nesting level of '100' reached, aborting!