GroupUrlRule fails on 2.0.45

[nilsburg]

What steps will reproduce the problem?

This problem appears with version 2.0.45. On version 2.0.44 or below it works as expected.

• Create a new project using yii2-app-basic
• Install Yii 2.0.45
• Create a module named 'test', with controller and view
• Add a GroupUrlRule to load the module:

'urlManager'   => [
            'enablePrettyUrl' => true,
            'showScriptName'  => false,
            'rules'           => [
                new GroupUrlRule([
                    'prefix'      => '/',
                    'routePrefix' => 'test',
                    'rules'       => [
                        '/' => 'default/index',
                    ],
                ]),
            ],
        ],

• Run PHP webserver with php -S localhost:8888
• Open the url http://localhost:8888

What is the expected result?

Result from running route test/default/index

What do you get instead?

Result from running route site/index

When downgrading Yii to 2.0.44 it loads test/default/index correctly.

Additional info

config/web.php

<?php

use yii\web\GroupUrlRule;

$params = require __DIR__ . '/params.php';
$db = require __DIR__ . '/db.php';

$config = [
    'id'         => 'basic',
    'basePath'   => dirname(__DIR__),
    'bootstrap'  => ['log'],
    'aliases'    => [
        '@bower' => '@vendor/bower-asset',
        '@npm'   => '@vendor/npm-asset',
    ],
    'modules'    => [
        'test' => 'app\modules\test\Module',
    ],
    'components' => [
        'request'      => [
            // !!! insert a secret key in the following (if it is empty) - this is required by cookie validation
            'cookieValidationKey' => 'abs',
        ],
        'cache'        => [
            'class' => 'yii\caching\FileCache',
        ],
        'user'         => [
            'identityClass'   => 'app\models\User',
            'enableAutoLogin' => true,
        ],
        'errorHandler' => [
            'errorAction' => 'site/error',
        ],
        'mailer'       => [
            'class'            => 'yii\swiftmailer\Mailer',
            // send all mails to a file by default. You have to set
            // 'useFileTransport' to false and configure transport
            // for the mailer to send real emails.
            'useFileTransport' => true,
        ],
        'log'          => [
            'traceLevel' => YII_DEBUG ? 3 : 0,
            'targets'    => [
                [
                    'class'  => 'yii\log\FileTarget',
                    'levels' => ['error', 'warning'],
                ],
            ],
        ],
        'urlManager'   => [
            'enablePrettyUrl' => true,
            'showScriptName'  => false,
            'rules'           => [
                new GroupUrlRule([
                    'prefix'      => '/',
                    'routePrefix' => 'test',
                    'rules'       => [
                        '/' => 'default/index',
                    ],
                ]),
            ],
        ],
        'db'           => $db,
        /*
        'urlManager' => [
            'enablePrettyUrl' => true,
            'showScriptName' => false,
            'rules' => [
            ],
        ],
        */
    ],
    'params'     => $params,
];

if (YII_ENV_DEV) {
    // configuration adjustments for 'dev' environment
    $config['bootstrap'][] = 'debug';
    $config['modules']['debug'] = [
        'class' => 'yii\debug\Module',
        // uncomment the following to add your IP if you are not connecting from localhost.
        //'allowedIPs' => ['127.0.0.1', '::1'],
    ];

    $config['bootstrap'][] = 'gii';
    $config['modules']['gii'] = [
        'class' => 'yii\gii\Module',
        // uncomment the following to add your IP if you are not connecting from localhost.
        //'allowedIPs' => ['127.0.0.1', '::1'],
    ];
}

return $config;

Module test setup
modules/tests/controllers/DefaultController.php

<?php

namespace app\modules\test\controllers;

class DefaultController extends \yii\web\Controller
{
    public function actionIndex()
    {
        return $this->render('index');
    }
}

modules/tests/views/default/index.php

index
<?php

modules/test/Module.php

<?php

namespace app\modules\test;

class Module extends \yii\base\Module
{

}

Q	A
Yii version	2.0.45
PHP version	7.4
Operating system	Ubuntu

[WinterSilence]

I don't see error, http://localhost:8888/ - Application::$defaultRoute, http://localhost:8888/test/ - DefaultController(test module)

[bizley]

Hm, I can see this change made to the GroupUrlRule. Was there a reason to remove /?

[nilsburg]

Hm, I can see this change made to the GroupUrlRule. Was there a reason to remove /?

I can confirm that changing that line back solves the issue.