Unrecognized message type: php

When running the following command drush aa --html --bootstrap --detail --skip=insights > report.html I got a drush error:

Unrecognized message type: php.
Recognized types are: access denied, cron, mail, page not found, user.

I don't have any PHP watchdog messages on my site, and it looks like this is coming from drush core_watchdog_query() (see api docs) but the errors just not being caught at http://cgit.drupalcode.org/site_audit/tree/Check/Watchdog/Php.php#n67

I don't know drush well, so not sure if you can catch the drush_set_error() or you need to check drush_watchdog_message_types() first and skip if necessary. Or since core_watchdog_query() is so basic just skip it outright for this case.

I haven't looked at the other watchdog checks either, but they might have same problems.