Successfully updated from 2.1.9 to 2.2.2 When switching from development to production, the process hangs up on the compilation process.
I've stack traced the error, it appears that a class QR code does not exist. I've cleared the contents of var/generation and var/di, the problem still arises.
Not sure where to go from here, any help would be appreciated.
$ php bin/magento setup:di:compile -vvv
Compilation was started. Application code generator... 3/7 [============>---------------] 42% 6 secs 274.0 MiB
[ReflectionException] Class \QRcode does not exist
Exception trace: () at /var/www/html/setup/src/Magento/Setup/Module/Di/Code/Scanner/PhpScanner.php:177 ReflectionClass->__construct() at /var/www/html/setup/src/Magento/Setup/Module/Di/Code/Scanner/PhpScanner.php:177 Magento\Setup\Module\Di\Code\Scanner\PhpScanner->collectEntities() at /var/www/html/setup/src/Magento/Setup/Module/Di/App/Task/Operation/ApplicationCodeGenerator.php:77 Magento\Setup\Module\Di\App\Task\Operation\ApplicationCodeGenerator->doOperation() at /var/www/html/setup/src/Magento/Setup/Module/Di/App/Task/Manager.php:56 Magento\Setup\Module\Di\App\Task\Manager->process() at /var/www/html/setup/src/Magento/Setup/Console/Command/DiCompileCommand.php:205 Magento\Setup\Console\Command\DiCompileCommand->execute() at /var/www/html/vendor/symfony/console/Command/Command.php:242 Symfony\Component\Console\Command\Command->run() at /var/www/html/vendor/symfony/console/Application.php:843 Symfony\Component\Console\Application->doRunCommand() at /var/www/html/vendor/symfony/console/Application.php:193 Symfony\Component\Console\Application->doRun() at /var/www/html/vendor/magento/framework/Console/Cli.php:104 Magento\Framework\Console\Cli->doRun() at /var/www/html/vendor/symfony/console/Application.php:117 Symfony\Component\Console\Application->run() at /var/www/html/bin/magento:23
setup:di:compile
