unhandled exception when user marked as deleted from LDAP

Indexing threw an unhandled exception and aborted:

USER: user116985
An unhandled exception has been thrown:
Error: Call to a member function instanceOfStorage() on null in /var/www/nextcloud/lib/private/Files/View.php:1922
Stack trace:
#0 /var/www/nextcloud/lib/private/Files/View.php(2036): OC\Files\View->lockPath('/user251442', 1, false)
#1 /var/www/nextcloud/lib/private/Files/View.php(1134): OC\Files\View->lockFile('/user251442', 1)
#2 /var/www/nextcloud/lib/private/Files/View.php(267): OC\Files\View->basicOperation('mkdir', '/user251442', Array)
#3 /var/www/nextcloud/lib/private/Files/Node/Folder.php(160): OC\Files\View->mkdir('/user251442')
#4 /var/www/nextcloud/lib/private/Files/Node/Root.php(380): OC\Files\Node\Folder->newFolder('/user251442')
#5 [internal function]: OC\Files\Node\Root->getUserFolder('user251442')
#6 /var/www/nextcloud/lib/private/Files/Node/LazyRoot.php(64): call_user_func_array(Array, Array)
#7 /var/www/nextcloud/lib/private/Files/Node/LazyRoot.php(281): OC\Files\Node\LazyRoot->__call('getUserFolder', Array)
#8 /var/www/nextcloud/apps/files_fulltextsearch/lib/Service/FilesService.php(264): OC\Files\Node\LazyRoot->getUserFolder('user251442')
#9 /var/www/nextcloud/apps/files_fulltextsearch/lib/Service/FilesService.php(735): OCA\Files_FullTextSearch\Service\FilesService->getPathFromViewerId(512001, 'user251442')
#10 /var/www/nextcloud/apps/files_fulltextsearch/lib/Service/FilesService.php(537): OCA\Files_FullTextSearch\Service\FilesService->getShareNamesFromFile(Object(OC\Files\Node\Folder), Object(OCA\FullTextSearch\Model\DocumentAccess))
#11 /var/www/nextcloud/apps/files_fulltextsearch/lib/Service/FilesService.php(485): OCA\Files_FullTextSearch\Service\FilesService->updateAccessFromFile(Object(OCA\Files_FullTextSearch\Model\FilesDocument), Object(OC\Files\Node\Folder))
#12 /var/www/nextcloud/apps/files_fulltextsearch/lib/Service/FilesService.php(466): OCA\Files_FullTextSearch\Service\FilesService->updateDocumentFromFile(Object(OCA\Files_FullTextSearch\Model\FilesDocument), Object(OC\Files\Node\Folder))
#13 /var/www/nextcloud/apps/files_fulltextsearch/lib/Service/FilesService.php(400): OCA\Files_FullTextSearch\Service\FilesService->updateDocumentFromFilesDocument(Object(OCA\Files_FullTextSearch\Model\FilesDocument))
#14 /var/www/nextcloud/apps/files_fulltextsearch/lib/Provider/FilesProvider.php(203): OCA\Files_FullTextSearch\Service\FilesService->generateDocuments(Array)
#15 /var/www/nextcloud/apps/fulltextsearch/lib/Service/IndexService.php(248): OCA\Files_FullTextSearch\Provider\FilesProvider->fillIndexDocuments(Array)
#16 /var/www/nextcloud/apps/fulltextsearch/lib/Service/IndexService.php(218): OCA\FullTextSearch\Service\IndexService->indexChunk(Object(OCA\FullTextSearch_ElasticSearch\Platform\ElasticSearchPlatform), Object(OCA\Files_FullTextSearch\Provider\FilesProvider), Array)
#17 /var/www/nextcloud/apps/fulltextsearch/lib/Service/IndexService.php(127): OCA\FullTextSearch\Service\IndexService->indexChunks(Object(OCA\FullTextSearch_ElasticSearch\Platform\ElasticSearchPlatform), Object(OCA\Files_FullTextSearch\Provider\FilesProvider), Array)
#18 /var/www/nextcloud/apps/fulltextsearch/lib/Command/Index.php(146): OCA\FullTextSearch\Service\IndexService->indexProviderContentFromUser(Object(OCA\FullTextSearch_ElasticSearch\Platform\ElasticSearchPlatform), Object(OCA\Files_FullTextSearch\Provider\FilesProvider), 'user116985')
#19 /var/www/nextcloud/apps/fulltextsearch/lib/Command/Index.php(119): OCA\FullTextSearch\Command\Index->indexProvider(Object(OCA\Files_FullTextSearch\Provider\FilesProvider))
#20 /var/www/nextcloud/3rdparty/symfony/console/Command/Command.php(264): OCA\FullTextSearch\Command\Index->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#21 /var/www/nextcloud/core/Command/Base.php(161): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#22 /var/www/nextcloud/3rdparty/symfony/console/Application.php(874): OC\Core\Command\Base->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#23 /var/www/nextcloud/3rdparty/symfony/console/Application.php(228): Symfony\Component\Console\Application->doRunCommand(Object(OCA\FullTextSearch\Command\Index), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#24 /var/www/nextcloud/3rdparty/symfony/console/Application.php(130): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#25 /var/www/nextcloud/lib/private/Console/Application.php(173): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#26 /var/www/nextcloud/console.php(90): OC\Console\Application->run()
#27 /var/www/nextcloud/occ(11): require_once('/var/www/nextcl...')
#28 {main}

user251442 had been deleted from LDAP and hence marked as deleted in Nextcloud (but not deleted with occ user:delete yet)

Start in apps/files_fulltextsearch/lib/Service/FilesService.php at lines 264 and 735, then trace the getUserFolder call in the stack trace while indexing a user marked deleted by LDAP. Reproduce indexing for that state and determine the expected handling. Done means the index command no longer aborts with the null instanceOfStorage() exception.