exception.log in production has a steady stream of these. All on mediawikiwiki, either from Special:Notifications. 103 of them, starting May 11.

These seem to be notifications for the current user, so you don't get them if you visit this URL yourself. It's unclear what user is getting these errors. The failure is coming from

extensions/Echo/formatters/BasicFormatter.php(647): Flow\NotificationFormatter->processParam(Object(EchoEvent), 'topic-permalink', Object(Message), Object(User))

2014-06-03 00:04:12 mw1191 mediawikiwiki: [36f37e94] /w/api.php?action=query&format=json&meta=notifications&notformat=flyout&notlimit=8&notprop=index%7Clist%7Ccount&_=1401753850252 Exception from line 357 of /usr/local/apache/common-local/php-1.24wmf7/extensions/Flow/includes/UrlGenerator.php: Catchable fatal error: Argument 1 passed to Flow\UrlGenerator::workflowLink() must be an instance of Title, instance of Flow\Model\UUID given, called in /usr/local/apache/common-local/php-1.24wmf7/extensions/Flow/includes/Notifications/Formatter.php on line 54

and

[f5218bdd] /wiki/Special:Notifications Exception from line 343 of /usr/local/apache/common-local/php-1.24wmf6/extensions/Flow/includes/UrlGenerator.php: Catchable fatal error: Argument 1 passed to Flow\UrlGenerator::workflowLink() must be an instance of Title, instance of Flow\Model\UUID given, called in /usr/local/apache/common-local/php-1.24wmf6/extensions/Flow/includes/Notifications/Formatter.php on line 54 and defined

full trace of most recent:

2014-06-03 00:04:12 mw1191 mediawikiwiki: [36f37e94] /w/api.php?action=query&format=json&meta=notifications&notformat=f
lyout&notlimit=8&notprop=index%7Clist%7Ccount&_=1401753850252 Exception from line 357 of /usr/local/apache/common-loc
al/php-1.24wmf7/extensions/Flow/includes/UrlGenerator.php: Catchable fatal error: Argument 1 passed to Flow\UrlGenerato
r::workflowLink() must be an instance of Title, instance of Flow\Model\UUID given, called in /usr/local/apache/common-l
ocal/php-1.24wmf7/extensions/Flow/includes/Notifications/Formatter.php on line 54 and defined
#0 /usr/local/apache/common-local/php-1.24wmf7/extensions/Flow/includes/UrlGenerator.php(357): EchoNotificationControll
er::formatterErrorHandler(4096, 'Argument 1 pass...', '/usr/local/apac...', 357, Array)
#1 /usr/local/apache/common-local/php-1.24wmf7/extensions/Flow/includes/Notifications/Formatter.php(54): Flow\UrlGenera
tor->workflowLink(Object(Flow\Model\UUID))
#2 /usr/local/apache/common-local/php-1.24wmf7/extensions/Echo/formatters/BasicFormatter.php(647): Flow\NotificationFormatter->processParam(Object(EchoEvent), 'topic-permalink', Object(Message), Object(User))
#3 /usr/local/apache/common-local/php-1.24wmf7/extensions/Echo/formatters/BasicFormatter.php(361): EchoBasicFormatter->processParams(Array, Object(EchoEvent), Object(Message), Object(User))
#4 /usr/local/apache/common-local/php-1.24wmf7/extensions/Echo/formatters/BasicFormatter.php(260): EchoBasicFormatter->formatFragment(Array, Object(EchoEvent), Object(User))
#5 /usr/local/apache/common-local/php-1.24wmf7/extensions/Echo/formatters/BasicFormatter.php(222): EchoBasicFormatter->formatNotificationTitle(Object(EchoEvent), Object(User))
#6 /usr/local/apache/common-local/php-1.24wmf7/extensions/Echo/controller/NotificationController.php(338): EchoBasicFormatter->format(Object(EchoEvent), Object(User), 'web')
#7 /usr/local/apache/common-local/php-1.24wmf7/extensions/Echo/api/ApiEchoNotifications.php(144): EchoNotificationController::formatNotification(Object(EchoEvent), Object(User), 'flyout')
#8 /usr/local/apache/common-local/php-1.24wmf7/extensions/Echo/api/ApiEchoNotifications.php(26): ApiEchoNotifications::getNotifications(Object(User), 'flyout', 9, NULL)
#9 /usr/local/apache/common-local/php-1.24wmf7/includes/api/ApiQuery.php(282): ApiEchoNotifications->execute()

and

2014-05-29 18:36:08 mw1213 mediawikiwiki: [f5218bdd] /wiki/Special:Notifications Exception from line 343 of /usr/loca
l/apache/common-local/php-1.24wmf6/extensions/Flow/includes/UrlGenerator.php: Catchable fatal error: Argument 1 passed
to Flow\UrlGenerator::workflowLink() must be an instance of Title, instance of Flow\Model\UUID given, called in /usr/lo
cal/apache/common-local/php-1.24wmf6/extensions/Flow/includes/Notifications/Formatter.php on line 54 and defined
#0 /usr/local/apache/common-local/php-1.24wmf6/extensions/Flow/includes/UrlGenerator.php(343): EchoNotificationControll
er::formatterErrorHandler(4096, 'Argument 1 pass...', '/usr/local/apac...', 343, Array)
#1 /usr/local/apache/common-local/php-1.24wmf6/extensions/Flow/includes/Notifications/Formatter.php(54): Flow\UrlGenera
tor->workflowLink(Object(Flow\Model\UUID))
#2 /usr/local/apache/common-local/php-1.24wmf6/extensions/Echo/formatters/BasicFormatter.php(647): Flow\NotificationFor
matter->processParam(Object(EchoEvent), 'topic-permalink', Object(Message), Object(User))
#3 /usr/local/apache/common-local/php-1.24wmf6/extensions/Echo/formatters/BasicFormatter.php(361): EchoBasicFormatter->
processParams(Array, Object(EchoEvent), Object(Message), Object(User))
#4 /usr/local/apache/common-local/php-1.24wmf6/extensions/Echo/formatters/BasicFormatter.php(262): EchoBasicFormatter->
formatFragment(Array, Object(EchoEvent), Object(User))
#5 /usr/local/apache/common-local/php-1.24wmf6/extensions/Echo/formatters/BasicFormatter.php(222): EchoBasicFormatter->
formatNotificationTitle(Object(EchoEvent), Object(User))
#6 /usr/local/apache/common-local/php-1.24wmf6/extensions/Echo/controller/NotificationController.php(338): EchoBasicFor
matter->format(Object(EchoEvent), Object(User), 'web')
#7 /usr/local/apache/common-local/php-1.24wmf6/extensions/Echo/api/ApiEchoNotifications.php(144): EchoNotificationContr
oller::formatNotification(Object(EchoEvent), Object(User), 'html')
#8 /usr/local/apache/common-local/php-1.24wmf6/extensions/Echo/special/SpecialNotifications.php(41): ApiEchoNotificatio
ns::getNotifications(Object(User), 'html', 21, NULL)
#9 /usr/local/apache/common-local/php-1.24wmf6/includes/specialpage/SpecialPage.php(379): SpecialNotifications->execute
(NULL)

Version: master
Severity: normal