reedy@deploy1002:~$ mwscript fixDoubleRedirects.php --wiki=hewikisource
Wikimedia\Assert\PreconditionException from line 49 of /srv/mediawiki-staging/php-1.39.0-wmf.23/vendor/wikimedia/assert/src/Assert.php: Precondition failed: This Title instance does not represent a proper page, but merely a link target.
#0 /srv/mediawiki-staging/php-1.39.0-wmf.23/includes/Title.php(4182): Wikimedia\Assert\Assert::precondition(false, 'This Title inst...')
#1 /srv/mediawiki-staging/php-1.39.0-wmf.23/includes/Title.php(4163): Title->assertProperPage()
#2 /srv/mediawiki-staging/php-1.39.0-wmf.23/includes/Revision/RevisionStore.php(1828): Title->getId(false)
#3 /srv/mediawiki-staging/php-1.39.0-wmf.23/includes/Revision/RevisionStore.php(1733): MediaWiki\Revision\RevisionStore->ensureRevisionRowMatchesPage(Object(stdClass), Object(Title))
#4 /srv/mediawiki-staging/php-1.39.0-wmf.23/includes/Revision/RevisionStore.php(1609): MediaWiki\Revision\RevisionStore->newRevisionFromRowAndSlots(Object(stdClass), NULL, 1, Object(Title), false)
#5 /srv/mediawiki-staging/php-1.39.0-wmf.23/includes/Revision/RevisionStore.php(2348): MediaWiki\Revision\RevisionStore->newRevisionFromRow(Object(stdClass), 1, Object(Title))
#6 /srv/mediawiki-staging/php-1.39.0-wmf.23/includes/Revision/RevisionStore.php(1286): MediaWiki\Revision\RevisionStore->loadRevisionFromConds(Object(Wikimedia\Rdbms\DBConnRef), Array, 1, Object(Title))
#7 /srv/mediawiki-staging/php-1.39.0-wmf.23/includes/jobqueue/jobs/DoubleRedirectJob.php(122): MediaWiki\Revision\RevisionStore->getRevisionByTitle(Object(Title), 0, 1)
#8 /srv/mediawiki-staging/php-1.39.0-wmf.23/maintenance/fixDoubleRedirects.php(111): DoubleRedirectJob->run()
#9 /srv/mediawiki-staging/php-1.39.0-wmf.23/maintenance/includes/MaintenanceRunner.php(309): FixDoubleRedirects->execute()
#10 /srv/mediawiki-staging/php-1.39.0-wmf.23/maintenance/doMaintenance.php(85): MediaWiki\Maintenance\MaintenanceRunner->run()
#11 /srv/mediawiki-staging/php-1.39.0-wmf.23/maintenance/fixDoubleRedirects.php(142): require_once('/srv/mediawiki-...')
#12 /srv/mediawiki-staging/multiversion/MWScript.php(120): require_once('/srv/mediawiki-...')
#13 {main}