TYPO3 Core

Plenty of notices are thrown when running slug upgrade wizard.

PHP Notice: Trying to get property 'workspace' of non-object in /var/www/html/typo3/sysext/backend/Classes/Utility/BackendUtility.php on line 4037
PHP Notice: Trying to get property 'workspace' of non-object in /var/www/html/typo3/sysext/backend/Classes/Utility/BackendUtility.php on line 4290
PHP Notice: Trying to get property 'workspace' of non-object in /var/www/html/typo3/sysext/backend/Classes/Utility/BackendUtility.php on line 4037

Example stack trace:

BackendUtility.php:4290, TYPO3\CMS\Backend\Utility\BackendUtility::getMovePlaceholder()
BackendUtility.php:494, TYPO3\CMS\Backend\Utility\BackendUtility::getPageForRootline()
BackendUtility.php:387, TYPO3\CMS\Backend\Utility\BackendUtility::BEgetRootLine()
SlugHelper.php:545, TYPO3\CMS\Core\DataHandling\SlugHelper->resolveParentPageRecord()
SlugHelper.php:169, TYPO3\CMS\Core\DataHandling\SlugHelper->generate()
PopulatePageSlugs.php:167, TYPO3\CMS\Install\Updates\PopulatePageSlugs->populateSlugs()
PopulatePageSlugs.php:99, TYPO3\CMS\Install\Updates\PopulatePageSlugs->executeUpdate()
UpgradeWizardsService.php:397, TYPO3\CMS\Install\Service\UpgradeWizardsService->executeWizard()
UpgradeController.php:967, TYPO3\CMS\Install\Controller\UpgradeController->upgradeWizardsExecuteAction()
RequestHandler.php:205, TYPO3\CMS\Install\Http\RequestHandler->handle()
Application.php:65, TYPO3\CMS\Install\Http\Application->handle()
AbstractApplication.php:110, TYPO3\CMS\Install\Http\Application->run()
install.php:104, {closure:/var/www/html/typo3/install.php:101-105}()
install.php:105, {main}()