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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace N98\Magento\Application\Console\EventSubscriber;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use N98\Magento\Application;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use N98\Magento\Application\ApplicationAwareInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use N98\Magento\Application\Console\Event;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use N98\Magento\Application\Console\Events;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Symfony\Component\Console\Event\ConsoleEvent;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Symfony\Component\EventDispatcher\EventSubscriberInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Class CheckCompatibility  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @package N98\Magento\Application\Console\EventSubscriber  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class CheckCompatibility implements EventSubscriberInterface, ApplicationAwareInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var Application  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $application;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Returns an array of event names this subscriber wants to listen to.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return array The event names to listen to  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @api  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public static function getSubscribedEvents()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            Events::RUN_BEFORE => 'checkCompatibility',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Display a warning if a running n98-magerun as root user  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param ConsoleEvent $event  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return void  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function checkCompatibility(ConsoleEvent $event)  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        try { | 
            
            
                                                                        
                            
            
                                    
            
            
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                            $this->application->initMagento(true);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            $objectManager = $this->application->getObjectManager();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            if (!$objectManager) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                                return;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            $productMetadata = $objectManager->get(\Magento\Framework\App\ProductMetadataInterface::class);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            $currentMagentoVersion = $productMetadata->getVersion();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            if (version_compare($currentMagentoVersion, '2.3.0', '<')) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                                $output = $event->getOutput();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                $output->writeln([  | 
            
                            
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                                    '',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '<error>You are running an incompatible version of n98-magerun2!</error>',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '<error>Your shop version has to be >2.3.0</error>',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '<comment>Current Magento Version     : ' . $currentMagentoVersion . '</comment>',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '<comment>Current n98-magerun2 Version: ' . $this->application->getVersion() . '</comment>',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '<info>Please download an older version of n98-magerun2.</info>',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '<info>Visit: https://files.magerun.net/old_versions.php</info>',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '    Magento 2.2.x => n98-magerun2 v3.2.0',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '    Magento 2.1.x => n98-magerun2 v3.2.0',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '    Magento 2.0.x => n98-magerun2 v2.3.3',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                    '',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                ]);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                exit(1);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        } catch (\Exception $e) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                            //  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function setApplication($application)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->application = $application;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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It seems like the type of the argument is not accepted by the function/method which you are calling.
In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.
We suggest to add an explicit type cast like in the following example: