When running the `checkStorage.php` maintenance script, with the `--fix` option, I am given a fatal exception:
```
MediaWiki\Revision\RevisionAccessException: No such slot: 3
Backtrace:
from /srv/mediawiki/w/includes/Revision/RevisionSlots.php(114)
#0 /srv/mediawiki/w/includes/Revision/RevisionSlots.php(95): MediaWiki\Revision\RevisionSlots->getSlot(integer)
#1 /srv/mediawiki/w/includes/import/WikiRevision.php(495): MediaWiki\Revision\RevisionSlots->getContent(integer)
#2 /srv/mediawiki/w/maintenance/storage/checkStorage.php(518): WikiRevision->getContent(integer)
#3 /srv/mediawiki/w/includes/import/WikiImporter.php(571): CheckStorage->importRevision(WikiRevision, WikiImporter)
#4 /srv/mediawiki/w/includes/import/WikiImporter.php(1059): WikiImporter->revisionCallback(WikiRevision)
#5 /srv/mediawiki/w/includes/import/WikiImporter.php(926): WikiImporter->processRevision(array, array)
#6 /srv/mediawiki/w/includes/import/WikiImporter.php(861): WikiImporter->handleRevision(array)
#7 /srv/mediawiki/w/includes/import/WikiImporter.php(678): WikiImporter->handlePage()
#8 /srv/mediawiki/w/maintenance/storage/checkStorage.php(513): WikiImporter->doImport()
#9 /srv/mediawiki/w/maintenance/storage/checkStorage.php(371): CheckStorage->restoreText(array, string)
#10 /srv/mediawiki/w/maintenance/storage/checkStorage.php(35): CheckStorage->check(boolean, string)
#11 {main}
```
I have already done two patches to fix other fatals with this script, which were both submitted and backported, but I was unsure on this error, and have no further thoughts for resolution.
This script seems to be poorly maintained, but I do hope for some resolution to this issue, as this script is vital to us fixing an issue that happened following database compression (T293574).