Wikimedia Bugzilla is closed!

I saw this in production fatal.log  This is on mediawiki.org and was prior to today's deploy of 1.23wmf14

[13-Feb-2014 11:32:05] Catchable fatal error: Argument 1 passed to Flow\Model\TopicListEntry::toStorageRow() must be an instance of Flow\Model\TopicListEntry, null given at /usr/local/apache/common-local/php-1.23wmf13/extensions/Flow/includes/Model/TopicListEntry.php on line 34
Server: mw1204
Method: GET
URL: http://www.mediawiki.org/w/api.php?action=query&format=json&list=flow&flowpage=Talk%3ASandbox&flowworkflow=rl7iby6wgksbpfno&flowparams=%7B%22topiclist%22%3A%7B%22offset-dir%22%3A%22fwd%22%2C%22offset-id%22%3A%22rocpxec9qyafpbwk%22%2C%22limit%22%3A10%2C%22render%22%3Atrue%7D%7D
Cookie: centralauth_User=<someUser>; centralauth_Token=<blahblah>; forceHTTPS=1; mediawikiwikiSession=<blahblah>; centralnotice_bucket=0-4.2

mw.org is now running 1.23wmf14.  That API URL now works for me, it returns valid JSON with a header element and a block containing 10 topics. Cleaned up it's

http://www.mediawiki.org/w/api.php?
    action=query&
    format=json&
    list=flow&
    flowpage=Talk:Sandbox&
    flowworkflow=rl7iby6wgksbpfno&
    flowparams={
        "topiclist": {
        "offset-dir": "fwd",
        "offset-id": "rocpxec9qyafpbwk",
        "limit": 10,
        "render": true
        }
    }

checking the February logs there was a nearly identical fatal on February 8 in 
fluorine:/a/mw-log/archive/fatal.log-20140208.gz, but on Talk:Flow 

Here's the backtrace of the one today, again the Feb 8 is nearly identical.

Backtrace:
#0 /usr/local/apache/common-local/php-1.23wmf13/extensions/Flow/includes/Model/TopicListEntry.php(34): Flow\Model\TopicListEntry::toStorageRow()
#1 [internal function]: Flow\Model\TopicListEntry::toStorageRow(NULL)
#2 /usr/local/apache/common-local/php-1.23wmf13/extensions/Flow/includes/Data/ObjectManager.php(630): call_user_func(Array, NULL)
#3 /usr/local/apache/common-local/php-1.23wmf13/extensions/Flow/includes/Data/ObjectManager.php(589): Flow\Data\BasicObjectMapper->toStorageRow(NULL)
#4 /usr/local/apache/common-local/php-1.23wmf13/extensions/Flow/includes/Data/Pager.php(107): Flow\Data\ObjectManager->serializeOffset(NULL, Array)
#5 /usr/local/apache/common-local/php-1.23wmf13/extensions/Flow/includes/Data/Pager.php(79): Flow\Data\Pager->makePagingLink('rev', NULL, 10)
#6 /usr/local/apache/common-local/php-1.23wmf13/extensions/Flow/includes/Data/Pager.php(40): Flow\Data\Pager->processPage('fwd', Object(Flow\Model\UUID), 10, NULL)
#7 /usr/local/apache/common-local/php-1.23wmf13/extensions/Flow/includes/Block/TopicList.php(279): Flow\Data\Pager->getPage()
#8 /usr/local/apache/common-local/php-1.23wmf13/extensions/Flow/includes/Block/TopicList.php(207): Flow\Block\TopicListBlock->getPage(Array)
#9 /usr/local/apache/common-local/php-1.23wmf13/extensions/Flow/includes/api/ApiQueryFlow.php(45): Flow\Block\TopicListBlock->renderAPI(Object(Flow\Templating), Array)
#10 /usr/local/apache/common-local/php-1.23wmf13/includes/api/ApiQuery.php(279): ApiQueryFlow->execute()
#11 /usr/local/apache/common-local/php-1.23wmf13/includes/api/ApiMain.php(861): ApiQuery->execute()
#12 /usr/local/apache/common-local/php-1.23wmf13/includes/api/ApiMain.php(362): ApiMain->executeAction()
#13 /usr/local/apache/common-local/php-1.23wmf13/includes/api/ApiMain.php(333): ApiMain->executeActionWithErrorHandling()
#14 /usr/local/apache/common-local/php-1.23wmf13/api.php(76): ApiMain->execute()
#15 /usr/local/apache/common-local/w/api.php(3): require('/usr/local/apac...')
#16 {main}