在 Laravel 6 v6.20.43、Laravel Telescope v2.1.17 中， \vendor\laravel\telescope\src\Watchers\EventWatcher.php:91，报错：get_class() expects parameter 1 to be object, string given

1、在 \vendor\laravel\telescope\src\Watchers\EventWatcher.php:91，报错：get_class() expects parameter 1 to be object, string given。如图1

图1

{
    "message": "get_class() expects parameter 1 to be object, string given",
    "status_code": 500,
    "debug": {
        "line": 91,
        "file": "E:\\wwwroot\\object\\vendor\\laravel\\telescope\\src\\Watchers\\EventWatcher.php",
        "class": "ErrorException",
        "trace": [
            "#0 [internal function]: Illuminate\\Foundation\\Bootstrap\\HandleExceptions->handleError(2, 'get_class() exp...', 'E:\\\\wwwroot\\\\wsho...', 91, Array)",
            "#1 E:\\wwwroot\\object\\vendor\\laravel\\telescope\\src\\Watchers\\EventWatcher.php(91): get_class('App\\\\Listeners\\\\U...')",
            "#2 [internal function]: Laravel\\Telescope\\Watchers\\EventWatcher->Laravel\\Telescope\\Watchers\\{closure}(Array, 1)",
            "#3 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Support\\Collection.php(638): array_map(Object(Closure), Array, Array)",
            "#4 E:\\wwwroot\\object\\vendor\\laravel\\telescope\\src\\Watchers\\EventWatcher.php(95): Illuminate\\Support\\Collection->map(Object(Closure))",
            "#5 E:\\wwwroot\\object\\vendor\\laravel\\telescope\\src\\Watchers\\EventWatcher.php(47): Laravel\\Telescope\\Watchers\\EventWatcher->formatListeners('App\\\\Events\\\\Them...')",
            "#6 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Events\\Dispatcher.php(366): Laravel\\Telescope\\Watchers\\EventWatcher->recordEvent('App\\\\Events\\\\Them...', Array)",
            "#7 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Events\\Dispatcher.php(218): Illuminate\\Events\\Dispatcher->Illuminate\\Events\\{closure}('App\\\\Events\\\\Them...', Array)",
            "#8 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\helpers.php(477): Illuminate\\Events\\Dispatcher->dispatch('App\\\\Events\\\\Them...')",
            "#9 E:\\wwwroot\\object\\app\\Services\\ThemeService.php(124): event(Object(App\\Events\\Theme\\ThemeUpdated))",
            "#10 E:\\wwwroot\\object\\app\\Services\\ThemeService.php(184): App\\Services\\ThemeService->update(2, Array, false)",
            "#11 E:\\wwwroot\\object\\app\\Http\\Controllers\\Admin\\API\\ThemeController.php(50): App\\Services\\ThemeService->setDefault(2)",
            "#12 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Controller.php(54): App\\Http\\Controllers\\Admin\\API\\ThemeController->setDefault('2', Object(App\\Services\\ThemeService))",
            "#13 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\ControllerDispatcher.php(45): Illuminate\\Routing\\Controller->callAction('setDefault', Array)",
            "#14 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Route.php(219): Illuminate\\Routing\\ControllerDispatcher->dispatch(Object(Illuminate\\Routing\\Route), Object(App\\Http\\Controllers\\Admin\\API\\ThemeController), 'setDefault')",
            "#15 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Route.php(176): Illuminate\\Routing\\Route->runController()",
            "#16 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Router.php(681): Illuminate\\Routing\\Route->run()",
            "#17 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(130): Illuminate\\Routing\\Router->Illuminate\\Routing\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#18 E:\\wwwroot\\object\\vendor\\spatie\\laravel-permission\\src\\Middlewares\\RoleOrPermissionMiddleware.php(25): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#19 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(171): Spatie\\Permission\\Middlewares\\RoleOrPermissionMiddleware->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure), 'manage_themes|a...')",
            "#20 E:\\wwwroot\\object\\app\\Http\\Middleware\\CheckStoreAdminStatus.php(45): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#21 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(171): App\\Http\\Middleware\\CheckStoreAdminStatus->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#22 E:\\wwwroot\\object\\app\\Http\\Middleware\\SwitchLanguage.php(28): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#23 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(171): App\\Http\\Middleware\\SwitchLanguage->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#24 E:\\wwwroot\\object\\vendor\\dingo\\api\\src\\Http\\Middleware\\Auth.php(55): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#25 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(171): Dingo\\Api\\Http\\Middleware\\Auth->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#26 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Auth\\Middleware\\Authenticate.php(43): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#27 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(171): Illuminate\\Auth\\Middleware\\Authenticate->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure), 'api')",
            "#28 E:\\wwwroot\\object\\vendor\\dingo\\api\\src\\Http\\Middleware\\PrepareController.php(45): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#29 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(171): Dingo\\Api\\Http\\Middleware\\PrepareController->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#30 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(105): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#31 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Router.php(683): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))",
            "#32 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Router.php(658): Illuminate\\Routing\\Router->runRouteWithinStack(Object(Illuminate\\Routing\\Route), Object(Dingo\\Api\\Http\\Request))",
            "#33 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Router.php(624): Illuminate\\Routing\\Router->runRoute(Object(Dingo\\Api\\Http\\Request), Object(Illuminate\\Routing\\Route))",
            "#34 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Routing\\Router.php(613): Illuminate\\Routing\\Router->dispatchToRoute(Object(Dingo\\Api\\Http\\Request))",
            "#35 E:\\wwwroot\\object\\vendor\\dingo\\api\\src\\Routing\\Adapter\\Laravel.php(88): Illuminate\\Routing\\Router->dispatch(Object(Dingo\\Api\\Http\\Request))",
            "#36 E:\\wwwroot\\object\\vendor\\dingo\\api\\src\\Routing\\Router.php(518): Dingo\\Api\\Routing\\Adapter\\Laravel->dispatch(Object(Dingo\\Api\\Http\\Request), 'v1')",
            "#37 E:\\wwwroot\\object\\vendor\\dingo\\api\\src\\Http\\Middleware\\Request.php(126): Dingo\\Api\\Routing\\Router->dispatch(Object(Dingo\\Api\\Http\\Request))",
            "#38 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(130): Dingo\\Api\\Http\\Middleware\\Request->Dingo\\Api\\Http\\Middleware\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#39 E:\\wwwroot\\object\\app\\Http\\Middleware\\ChangeAppUrlMiddleware.php(23): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#40 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(171): App\\Http\\Middleware\\ChangeAppUrlMiddleware->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#41 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest.php(21): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#42 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(171): Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#43 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest.php(21): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#44 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(171): Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#45 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Middleware\\ValidatePostSize.php(27): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#46 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(171): Illuminate\\Foundation\\Http\\Middleware\\ValidatePostSize->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#47 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Middleware\\CheckForMaintenanceMode.php(63): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#48 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(171): Illuminate\\Foundation\\Http\\Middleware\\CheckForMaintenanceMode->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#49 E:\\wwwroot\\object\\vendor\\fideloper\\proxy\\src\\TrustProxies.php(57): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#50 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(171): Fideloper\\Proxy\\TrustProxies->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#51 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(105): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#52 E:\\wwwroot\\object\\vendor\\dingo\\api\\src\\Http\\Middleware\\Request.php(127): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))",
            "#53 E:\\wwwroot\\object\\vendor\\dingo\\api\\src\\Http\\Middleware\\Request.php(103): Dingo\\Api\\Http\\Middleware\\Request->sendRequestThroughRouter(Object(Dingo\\Api\\Http\\Request))",
            "#54 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(171): Dingo\\Api\\Http\\Middleware\\Request->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#55 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Pipeline\\Pipeline.php(105): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))",
            "#56 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Kernel.php(145): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))",
            "#57 E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Foundation\\Http\\Kernel.php(110): Illuminate\\Foundation\\Http\\Kernel->sendRequestThroughRouter(Object(Illuminate\\Http\\Request))",
            "#58 E:\\wwwroot\\object\\public\\index.php(57): Illuminate\\Foundation\\Http\\Kernel->handle(Object(Illuminate\\Http\\Request))",
            "#59 {main}"
        ]
    }
}

2、查看 \vendor\laravel\telescope\src\Watchers\EventWatcher.php:91

                if (is_string($listener)) {
                    return Str::contains($listener, '@') ? $listener : $listener.'@handle';
                } elseif (is_array($listener)) {
                    return get_class($listener[0]).'@'.$listener[1];
                }

3、查看 EventServiceProvider

    /**
     * The event listener mappings for the application.
     *
     * @var array
     */
    protected $listen = [

        ThemeUpdated::class                                  => [
            ThemeUpdatedWebhookListener::class
        ],

    ];

4、这看起来像一个 Bug，我看到有一个新的提交正好解决了这个问题。提交：https://github.com/laravel/telescope/commit/a69fc6f4f5fd5b0ac5a242981e162774cbb69e17 。support new listeners syntax。如图2

图2

5、我暂未升级，而是参考提交的变更，编辑 \vendor\laravel\telescope\src\Watchers\EventWatcher.php

                if (is_string($listener)) {
                    return Str::contains($listener, '@') ? $listener : $listener.'@handle';
                } elseif (is_array($listener) && is_string($listener[0])) {
                    return $listener[0].'@'.$listener[1];
                } elseif (is_array($listener) && is_object($listener[0])) {
                    return get_class($listener[0]).'@'.$listener[1];
                }

6、再次运行程序，不再报错。后续决定升级 Laravel Telescope 至包含这个提交的版本。