"TypeError: Flow\Model\WikiReference::__construct argument Title null given" from Flow\ReferenceClarifier->loadReferencesForPage on Special:WhatLinksHere
Closed, ResolvedPublicPRODUCTION ERROR
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Authored By

	Reedy
	Mar 7 2025, 11:10 PM

Description

Error

mwversion: 1.44.0-wmf.19
reqId: fe68d19e-4219-4e89-a766-666e0ae947e3
Find reqId in Logstash

normalized_message

[{reqId}] {exception_url}   TypeError: Argument 8 passed to Flow\Model\WikiReference::__construct() must be an instance of MediaWiki\Title\Title, null given, called in /srv/mediawiki/php-1.44.0-wmf.19/extensions/Flow/includes/Model/WikiReference.php on li

Frame	Location	Call
from	/srv/mediawiki/php-1.44.0-wmf.19/extensions/Flow/includes/Model/WikiReference.php(28)
#0	/srv/mediawiki/php-1.44.0-wmf.19/extensions/Flow/includes/Model/WikiReference.php(82)	Flow\Model\WikiReference->__construct(Flow\Model\UUID, string, Flow\Model\UUID, MediaWiki\Title\Title, string, Flow\Model\UUID, string, null)
#1	/srv/mediawiki/php-1.44.0-wmf.19/extensions/Flow/includes/Data/Mapper/BasicObjectMapper.php(40)	Flow\Model\WikiReference::fromStorageRow(array, null)
#2	/srv/mediawiki/php-1.44.0-wmf.19/extensions/Flow/includes/Data/ObjectLocator.php(314)	Flow\Data\Mapper\BasicObjectMapper->fromStorageRow(array)
#3	/srv/mediawiki/php-1.44.0-wmf.19/extensions/Flow/includes/Data/ObjectManager.php(307)	Flow\Data\ObjectLocator->load(array)
#4	/srv/mediawiki/php-1.44.0-wmf.19/extensions/Flow/includes/Data/ObjectLocator.php(118)	Flow\Data\ObjectManager->load(array)
#5	/srv/mediawiki/php-1.44.0-wmf.19/extensions/Flow/includes/Data/ObjectLocator.php(69)	Flow\Data\ObjectLocator->findMulti(array, array)
#6	/srv/mediawiki/php-1.44.0-wmf.19/extensions/Flow/includes/Data/ManagerGroup.php(127)	Flow\Data\ObjectLocator->find(array)
#7	/srv/mediawiki/php-1.44.0-wmf.19/extensions/Flow/includes/Data/ManagerGroup.php(139)	Flow\Data\ManagerGroup->call(string, array)
#8	/srv/mediawiki/php-1.44.0-wmf.19/extensions/Flow/includes/ReferenceClarifier.php(115)	Flow\Data\ManagerGroup->find(string, array)
#9	/srv/mediawiki/php-1.44.0-wmf.19/extensions/Flow/includes/ReferenceClarifier.php(76)	Flow\ReferenceClarifier->loadReferencesForPage(MediaWiki\Title\Title)
#10	/srv/mediawiki/php-1.44.0-wmf.19/extensions/Flow/includes/ReferenceClarifier.php(30)	Flow\ReferenceClarifier->getWikiReferences(MediaWiki\Title\Title, MediaWiki\Title\Title)
#11	/srv/mediawiki/php-1.44.0-wmf.19/extensions/Flow/includes/Hooks.php(1163)	Flow\ReferenceClarifier->getWhatLinksHereProps(stdClass, MediaWiki\Title\Title, MediaWiki\Title\Title)
#12	/srv/mediawiki/php-1.44.0-wmf.19/includes/HookContainer/HookContainer.php(155)	Flow\Hooks->onWhatLinksHereProps(stdClass, MediaWiki\Title\Title, MediaWiki\Title\Title, array)
#13	/srv/mediawiki/php-1.44.0-wmf.19/includes/HookContainer/HookRunner.php(4647)	MediaWiki\HookContainer\HookContainer->run(string, array)
#14	/srv/mediawiki/php-1.44.0-wmf.19/includes/specials/SpecialWhatLinksHere.php(533)	MediaWiki\HookContainer\HookRunner->onWhatLinksHereProps(stdClass, MediaWiki\Title\Title, MediaWiki\Title\Title, array)
#15	/srv/mediawiki/php-1.44.0-wmf.19/includes/specials/SpecialWhatLinksHere.php(479)	MediaWiki\Specials\SpecialWhatLinksHere->listItem(stdClass, MediaWiki\Title\Title, MediaWiki\Title\Title)
#16	/srv/mediawiki/php-1.44.0-wmf.19/includes/specials/SpecialWhatLinksHere.php(475)	MediaWiki\Specials\SpecialWhatLinksHere->showIndirectLinks(int, MediaWiki\Title\Title, int)
#17	/srv/mediawiki/php-1.44.0-wmf.19/includes/specials/SpecialWhatLinksHere.php(117)	MediaWiki\Specials\SpecialWhatLinksHere->showIndirectLinks(int, MediaWiki\Title\Title, int, int, int, string)
#18	/srv/mediawiki/php-1.44.0-wmf.19/includes/specialpage/FormSpecialPage.php(245)	MediaWiki\Specials\SpecialWhatLinksHere->onSuccess()
#19	/srv/mediawiki/php-1.44.0-wmf.19/includes/specialpage/SpecialPage.php(729)	MediaWiki\SpecialPage\FormSpecialPage->execute(string)
#20	/srv/mediawiki/php-1.44.0-wmf.19/includes/specialpage/SpecialPageFactory.php(1737)	MediaWiki\SpecialPage\SpecialPage->run(string)
#21	/srv/mediawiki/php-1.44.0-wmf.19/includes/actions/ActionEntryPoint.php(503)	MediaWiki\SpecialPage\SpecialPageFactory->executePath(string, MediaWiki\Context\RequestContext)
#22	/srv/mediawiki/php-1.44.0-wmf.19/includes/actions/ActionEntryPoint.php(145)	MediaWiki\Actions\ActionEntryPoint->performRequest()
#23	/srv/mediawiki/php-1.44.0-wmf.19/includes/MediaWikiEntryPoint.php(202)	MediaWiki\Actions\ActionEntryPoint->execute()
#24	/srv/mediawiki/php-1.44.0-wmf.19/index.php(58)	MediaWiki\MediaWikiEntryPoint->run()
#25	/srv/mediawiki/w/index.php(3)	require(string)
#26	{main}

Impact

Notes

Details

Request URL: https://www.mediawiki.org/w/index.php?title=Special:WhatLinksHere/Help:Tabular_data&limit=500

Related Objects

Mentioned In: T394751: "TypeError: WikiReference::__construct(): Argument Title null" from Flow LinksTableUpdater->getReferencesForTitle while parsing a page
Mentioned Here: T394751: "TypeError: WikiReference::__construct(): Argument Title null" from Flow LinksTableUpdater->getReferencesForTitle while parsing a page

Event Timeline

Reedy created this task.Mar 7 2025, 11:10 PM

Restricted Application added a project: Growth-Team. · View Herald TranscriptMar 7 2025, 11:10 PM

Restricted Application added a subscriber: Aklapper. · View Herald Transcript

Reedy moved this task from Untriaged to Mar 2025 on the Wikimedia-production-error board.Mar 8 2025, 7:36 PM

Looks like some sort of bad data in the Flow links DB. Probably not going to be fixed before Flow undeploy.

Sgs moved this task from Inbox to Backlog on the Growth-Team board.Mar 10 2025, 12:25 PM

KStoller-WMF moved this task from Backlog to Triaged on the Growth-Team board.Mar 12 2025, 4:43 PM

Krinkle moved this task from Mar 2025 to Jan-Mar 2025 on the Wikimedia-production-error board.Apr 1 2025, 2:10 AM

Pppery mentioned this in T394751: "TypeError: WikiReference::__construct(): Argument Title null" from Flow LinksTableUpdater->getReferencesForTitle while parsing a page.May 20 2025, 1:25 PM

Krinkle renamed this task from TypeError: Argument 8 passed to Flow\Model\WikiReference::__construct() must be an instance of MediaWiki\Title\Title, null given, called in /srv/mediawiki/php-1.44.0-wmf.19/extensions/Flow/includes/Model/WikiReference.php on li to "TypeError: Flow\Model\WikiReference::__construct argument Title null given" from Flow\ReferenceClarifier->loadReferencesForPage on Special:WhatLinksHere.May 20 2025, 5:52 PM

Krinkle changed Request URL from https://www.mediawiki.org/w/index.php?mobileaction=*&title=* to https://www.mediawiki.org/w/index.php?title=Special:WhatLinksHere/Help:Tabular_data&limit=500.

I can't reproduce this today via https://www.mediawiki.org/w/index.php?title=Special:WhatLinksHere/Help:Tabular_data&limit=500.

I queryied Logstash as liberally as I can for the same or similar issues, by searching the following on the unfiltered "mediawiki" Logstash dashboard for:

message:"null given" AND exception.trace:Flow

And the only results in the last 7 days were instead for T394751: "TypeError: WikiReference::__construct(): Argument Title null" from Flow LinksTableUpdater->getReferencesForTitle while parsing a page.

Making as resolved as such, until it is found again.

Probably becausr the code that does this was deleted entirely in https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Flow/+/1143117

"TypeError: Flow\Model\WikiReference::__construct argument Title null given" from Flow\ReferenceClarifier->loadReferencesForPage on Special:WhatLinksHereClosed, ResolvedPublicPRODUCTION ERRORActions