We found these while debugging T106460:
Warning: LU_Updater::readMessages: Unable to parse messages from /var/lib/l10nupdate/mediawiki/extensions/Validator/Validator.i18n.php in /srv/mediawiki-staging/php-1.26wmf16/extensions/LocalisationUpdate/Updater.php on line 63 Warning: LU_Updater::readMessages: Unable to parse messages from /var/lib/l10nupdate/mediawiki/extensions/SemanticResultFormats/SemanticResultFormats.i18n.php in /srv/mediawiki-staging/php-1.26wmf16/extensions/LocalisationUpdate/Updater.php on line 63