- Enable WikimediaDebug.
- Enable "Verbose logging".
- Browse any URL on a production wiki, e.g. https://test.wikipedia.org/w/index.php?title=Main_Page&action=history
Actual:
[6d434a25-0cbf-9acd-918f-9271b1b4be4c] Uncaught UnexpectedValueException: Udp transport "udp:///XWikimediaDebug" must specify a host in /srv/mediawiki/php-1.43.0-wmf.21/includes/debug/logger/monolog/LegacyHandler.php:131