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TypeError: preg_replace(): Argument #3 ($subject) must be of type array|string, null given
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Error
  • service.version: 1.46.0-wmf.12
  • timestamp: 2026-01-21T13:42:29.904Z
  • labels.phpversion: 8.3.29
  • trace.id: 88b1e92b-7225-4d67-a0c0-2375e36b9eaa
  • Find trace.id in Logstash
labels.normalized_message
[{reqId}] {exception_url}   TypeError: preg_replace(): Argument #3 ($subject) must be of type array|string, null given
FrameLocationCall
from/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/Linter.php(1376)
#0/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/Linter.php(1376)preg_replace(string, string, null)
#1/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/Linter.php(1412)Wikimedia\Parsoid\Wt2Html\DOM\Processors\Linter->lintTemplateArgInExtensionTag(Wikimedia\Parsoid\Config\Env, Wikimedia\Parsoid\DOM\Element, Wikimedia\Parsoid\NodeData\DataParsoid, stdClass)
#2/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/Linter.php(1474)Wikimedia\Parsoid\Wt2Html\DOM\Processors\Linter->logWikitextFixups(Wikimedia\Parsoid\DOM\Element, Wikimedia\Parsoid\Config\Env, stdClass)
#3/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/Linter.php(1460)Wikimedia\Parsoid\Wt2Html\DOM\Processors\Linter->findLints(Wikimedia\Parsoid\DOM\Element, Wikimedia\Parsoid\Config\Env, stdClass)
#4/srv/mediawiki/php-1.46.0-wmf.12/extensions/Cite/src/Parsoid/RefTagHandler.php(123)Wikimedia\Parsoid\Wt2Html\DOM\Processors\Linter->Wikimedia\Parsoid\Wt2Html\DOM\Processors\{closure}(Wikimedia\Parsoid\DOM\Element)
#5/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/Linter.php(1456)Cite\Parsoid\RefTagHandler->lintHandler(Wikimedia\Parsoid\Ext\ParsoidExtensionAPI, Wikimedia\Parsoid\DOM\Element, Closure)
#6/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/Linter.php(1506)Wikimedia\Parsoid\Wt2Html\DOM\Processors\Linter->findLints(Wikimedia\Parsoid\DOM\DocumentFragment, Wikimedia\Parsoid\Config\Env, stdClass)
#7/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOMProcessorPipeline.php(131)Wikimedia\Parsoid\Wt2Html\DOM\Processors\Linter->run(Wikimedia\Parsoid\Config\Env, Wikimedia\Parsoid\DOM\DocumentFragment, array, bool)
#8/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOMProcessorPipeline.php(175)Wikimedia\Parsoid\Wt2Html\DOMProcessorPipeline->doPostProcess(Wikimedia\Parsoid\DOM\DocumentFragment)
#9/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/ParserPipeline.php(127)Wikimedia\Parsoid\Wt2Html\DOMProcessorPipeline->process(Wikimedia\Parsoid\DOM\DocumentFragment, array)
#10/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Utils/PipelineUtils.php(138)Wikimedia\Parsoid\Wt2Html\ParserPipeline->parse(Wikimedia\Parsoid\DOM\DocumentFragment, array)
#11/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/ProcessEmbeddedDocs.php(47)Wikimedia\Parsoid\Utils\PipelineUtils::processContentInPipeline(Wikimedia\Parsoid\Config\Env, Wikimedia\Parsoid\Wt2Html\PageConfigFrame, Wikimedia\Parsoid\DOM\DocumentFragment, array)
#12/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Utils/ContentUtils.php(169)Wikimedia\Parsoid\Wt2Html\DOM\Processors\ProcessEmbeddedDocs->Wikimedia\Parsoid\Wt2Html\DOM\Processors\{closure}(Wikimedia\Parsoid\DOM\DocumentFragment)
#13/srv/mediawiki/php-1.46.0-wmf.12/extensions/Cite/src/Parsoid/ReferenceListTagHandler.php(75)Wikimedia\Parsoid\Utils\ContentUtils::Wikimedia\Parsoid\Utils\{closure}(string)
#14/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Utils/ContentUtils.php(264)Cite\Parsoid\ReferenceListTagHandler->processAttributeEmbeddedHTML(Wikimedia\Parsoid\Ext\ParsoidExtensionAPI, Wikimedia\Parsoid\DOM\Element, Closure)
#15/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Utils/ContentUtils.php(178)Wikimedia\Parsoid\Utils\ContentUtils::processAttributeEmbeddedHTMLInternal(MediaWiki\Parser\Parsoid\Config\SiteConfig, Wikimedia\Parsoid\DOM\Element, Closure)
#16/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/ProcessEmbeddedDocs.php(43)Wikimedia\Parsoid\Utils\ContentUtils::processAttributeEmbeddedDom(MediaWiki\Parser\Parsoid\Config\SiteConfig, Wikimedia\Parsoid\DOM\Element, Closure)
#17/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/ProcessEmbeddedDocs.php(62)Wikimedia\Parsoid\Wt2Html\DOM\Processors\ProcessEmbeddedDocs->processNode(Wikimedia\Parsoid\DOM\Element, stdClass)
#18/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/ProcessEmbeddedDocs.php(62)Wikimedia\Parsoid\Wt2Html\DOM\Processors\ProcessEmbeddedDocs->processNode(Wikimedia\Parsoid\DOM\Element, stdClass)
#19/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/ProcessEmbeddedDocs.php(62)Wikimedia\Parsoid\Wt2Html\DOM\Processors\ProcessEmbeddedDocs->processNode(Wikimedia\Parsoid\DOM\Element, stdClass)
#20/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/ProcessEmbeddedDocs.php(83)Wikimedia\Parsoid\Wt2Html\DOM\Processors\ProcessEmbeddedDocs->processNode(Wikimedia\Parsoid\DOM\Element)
#21/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOMProcessorPipeline.php(131)Wikimedia\Parsoid\Wt2Html\DOM\Processors\ProcessEmbeddedDocs->run(Wikimedia\Parsoid\Config\Env, Wikimedia\Parsoid\DOM\Element, array, bool)
#22/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOMProcessorPipeline.php(175)Wikimedia\Parsoid\Wt2Html\DOMProcessorPipeline->doPostProcess(Wikimedia\Parsoid\DOM\Element)
#23/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/DOMProcessorPipeline.php(188)Wikimedia\Parsoid\Wt2Html\DOMProcessorPipeline->process(Wikimedia\Parsoid\DOM\Element, array)
#24/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/ParserPipeline.php(159)Wikimedia\Parsoid\Wt2Html\DOMProcessorPipeline->processChunkily(Wikimedia\Parsoid\DOM\Element, array)
#25/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/ParserPipeline.php(181)Wikimedia\Parsoid\Wt2Html\ParserPipeline->processPipelineStages(array, string, array)
#26/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wt2Html/ParserPipelineFactory.php(617)Wikimedia\Parsoid\Wt2Html\ParserPipeline->parseChunkily(string, array)
#27/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Wikitext/ContentModelHandler.php(184)Wikimedia\Parsoid\Wt2Html\ParserPipelineFactory->parse(string)
#28/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Parsoid.php(205)Wikimedia\Parsoid\Wikitext\ContentModelHandler->toDOM(Wikimedia\Parsoid\Ext\ParsoidExtensionAPI, null)
#29/srv/mediawiki/php-1.46.0-wmf.12/vendor/wikimedia/parsoid/src/Parsoid.php(271)Wikimedia\Parsoid\Parsoid->parseWikitext(MediaWiki\Parser\Parsoid\Config\PageConfig, MediaWiki\Parser\ParserOutput, array, null)
#30/srv/mediawiki/php-1.46.0-wmf.12/includes/Parser/Parsoid/ParsoidParser.php(153)Wikimedia\Parsoid\Parsoid->wikitext2html(MediaWiki\Parser\Parsoid\Config\PageConfig, array, null, MediaWiki\Parser\ParserOutput)
#31/srv/mediawiki/php-1.46.0-wmf.12/includes/Parser/Parsoid/ParsoidParser.php(286)MediaWiki\Parser\Parsoid\ParsoidParser->genParserOutput(MediaWiki\Parser\Parsoid\Config\PageConfig, MediaWiki\Parser\ParserOptions, null)
#32/srv/mediawiki/php-1.46.0-wmf.12/includes/Content/WikitextContentHandler.php(375)MediaWiki\Parser\Parsoid\ParsoidParser->parse(string, MediaWiki\Title\Title, MediaWiki\Parser\ParserOptions, bool, bool, int, null)
#33/srv/mediawiki/php-1.46.0-wmf.12/includes/Content/ContentHandler.php(1574)MediaWiki\Content\WikitextContentHandler->fillParserOutput(MediaWiki\Content\WikitextContent, MediaWiki\Content\Renderer\ContentParseParams, MediaWiki\Parser\ParserOutput)
#34/srv/mediawiki/php-1.46.0-wmf.12/includes/Content/Renderer/ContentRenderer.php(67)MediaWiki\Content\ContentHandler->getParserOutput(MediaWiki\Content\WikitextContent, MediaWiki\Content\Renderer\ContentParseParams)
#35/srv/mediawiki/php-1.46.0-wmf.12/includes/Revision/RenderedRevision.php(246)MediaWiki\Content\Renderer\ContentRenderer->getParserOutput(MediaWiki\Content\WikitextContent, MediaWiki\Page\PageIdentityValue, MediaWiki\Revision\RevisionStoreRecord, MediaWiki\Parser\ParserOptions, array)
#36/srv/mediawiki/php-1.46.0-wmf.12/includes/Revision/RenderedRevision.php(219)MediaWiki\Revision\RenderedRevision->getSlotParserOutputUncached(MediaWiki\Content\WikitextContent, array)
#37/srv/mediawiki/php-1.46.0-wmf.12/includes/Revision/RevisionRenderer.php(225)MediaWiki\Revision\RenderedRevision->getSlotParserOutput(string, array)
#38/srv/mediawiki/php-1.46.0-wmf.12/includes/Revision/RevisionRenderer.php(158)MediaWiki\Revision\RevisionRenderer->combineSlotOutput(MediaWiki\Revision\RenderedRevision, MediaWiki\Parser\ParserOptions, array)
#39/srv/mediawiki/php-1.46.0-wmf.12/includes/Revision/RenderedRevision.php(182)MediaWiki\Revision\RevisionRenderer->MediaWiki\Revision\{closure}(MediaWiki\Revision\RenderedRevision, array)
#40/srv/mediawiki/php-1.46.0-wmf.12/includes/Page/ParserOutputAccess.php(590)MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#41/srv/mediawiki/php-1.46.0-wmf.12/includes/Page/ParserOutputAccess.php(505)MediaWiki\Page\ParserOutputAccess->renderRevision(MediaWiki\Page\WikiPage, MediaWiki\Parser\ParserOptions, MediaWiki\Revision\RevisionStoreRecord, array, null)
#42/srv/mediawiki/php-1.46.0-wmf.12/extensions/Linter/includes/LintUpdate.php(82)MediaWiki\Page\ParserOutputAccess->getParserOutput(MediaWiki\Page\WikiPage, MediaWiki\Parser\ParserOptions, MediaWiki\Revision\RevisionStoreRecord, array)
#43/srv/mediawiki/php-1.46.0-wmf.12/includes/Deferred/DeferredUpdates.php(444)MediaWiki\Linter\LintUpdate->doUpdate()
#44/srv/mediawiki/php-1.46.0-wmf.12/includes/Deferred/RefreshSecondaryDataUpdate.php(99)MediaWiki\Deferred\DeferredUpdates::attemptUpdate(MediaWiki\Linter\LintUpdate)
#45/srv/mediawiki/php-1.46.0-wmf.12/includes/Deferred/DeferredUpdates.php(444)MediaWiki\Deferred\RefreshSecondaryDataUpdate->doUpdate()
#46/srv/mediawiki/php-1.46.0-wmf.12/includes/Storage/DerivedPageDataUpdater.php(1874)MediaWiki\Deferred\DeferredUpdates::attemptUpdate(MediaWiki\Deferred\RefreshSecondaryDataUpdate)
#47/srv/mediawiki/php-1.46.0-wmf.12/includes/Page/WikiPage.php(1891)MediaWiki\Storage\DerivedPageDataUpdater->doSecondaryDataUpdates(array)
#48/srv/mediawiki/php-1.46.0-wmf.12/includes/JobQueue/Jobs/RefreshLinksJob.php(291)MediaWiki\Page\WikiPage->doSecondaryDataUpdates(array)
#49/srv/mediawiki/php-1.46.0-wmf.12/includes/JobQueue/Jobs/RefreshLinksJob.php(202)MediaWiki\JobQueue\Jobs\RefreshLinksJob->runForTitle(MediaWiki\Title\Title)
#50/srv/mediawiki/php-1.46.0-wmf.12/extensions/EventBus/includes/JobExecutor.php(94)MediaWiki\JobQueue\Jobs\RefreshLinksJob->run()
#51/srv/mediawiki/rpc/RunSingleJob.php(60)MediaWiki\Extension\EventBus\JobExecutor->execute(array)
#52{main}
Impact
Notes

Details

MediaWiki Version
1.46.0-wmf.12
Request URL
https://mw-jobrunner.discovery.wmnet/rpc/RunSingleJob.php
Related Changes in Gerrit:
SubjectRepoBranchLines +/-
Cleanup after processing embeded docsmediawiki/services/parsoidmaster+6 -2
Parsoid test: Add lint test for disappearing src attrmediawiki/extensions/Citemaster+10 -0
Bump wikimedia/parsoid to 0.23.0-a13mediawiki/vendormaster+23 K -24 K
Log a warning if extension src isn't present when lintingmediawiki/services/parsoidmaster+3 -2
Customize query in gerrit

Related Objects

Event Timeline

Aklapper created this task.Wed, Jan 21, 7:39 PM
ABreault-WMF claimed this task.Wed, Jan 21, 10:41 PM
gerritbot added a comment.Wed, Jan 21, 11:49 PM

Change #1229784 had a related patch set uploaded (by Arlolra; author: Arlolra):

[mediawiki/services/parsoid@master] Log a warning if extension src isn't present when linting

https://gerrit.wikimedia.org/r/1229784

gerritbot added a project: Patch-For-Review.Wed, Jan 21, 11:49 PM
ABreault-WMF triaged this task as Medium priority.Wed, Jan 21, 11:52 PM
ABreault-WMF added a project: Content-Transform-Team (Work In Progress).
ABreault-WMF moved this task from Backlog to Code Review on the Content-Transform-Team (Work In Progress) board.
gerritbot added a comment.Thu, Jan 22, 10:50 AM

Change #1229784 merged by jenkins-bot:

[mediawiki/services/parsoid@master] Log a warning if extension src isn't present when linting

https://gerrit.wikimedia.org/r/1229784

Maintenance_bot removed a project: Patch-For-Review.Thu, Jan 22, 11:31 AM
cscott moved this task from Needs Triage to Bugs & Crashers on the Parsoid board.Thu, Jan 22, 3:32 PM
ABreault-WMF moved this task from Code Review to To Deploy on the Content-Transform-Team (Work In Progress) board.Fri, Jan 23, 12:52 AM
gerritbot added a comment.Mon, Jan 26, 4:57 PM

Change #1233217 had a related patch set uploaded (by OSleger; author: OSleger):

[mediawiki/vendor@master] Bump wikimedia/parsoid to 0.23.0-a13

https://gerrit.wikimedia.org/r/1233217

gerritbot added a project: Patch-For-Review.Mon, Jan 26, 4:57 PM
gerritbot added a comment.Mon, Jan 26, 6:33 PM

Change #1233217 merged by jenkins-bot:

[mediawiki/vendor@master] Bump wikimedia/parsoid to 0.23.0-a13

https://gerrit.wikimedia.org/r/1233217

Maintenance_bot removed a project: Patch-For-Review.Mon, Jan 26, 7:32 PM
ABreault-WMF merged a task: T415714: TypeError: preg_replace(): Argument #3 ($subject) must be of type array|string, null given.Tue, Jan 27, 10:57 PM
ABreault-WMF added a subscriber: Reedy.
brennen moved this task from Untriaged to Jan–Mar 2026 on the Wikimedia-production-error board.Thu, Jan 29, 4:42 PM
ABreault-WMF moved this task from To Deploy to To Verify on the Content-Transform-Team (Work In Progress) board.Mon, Feb 2, 9:58 PM
MSantos added a project: Essential-Work.Mon, Feb 9, 3:59 PM
ABreault-WMF added a comment.EditedMon, Feb 9, 10:43 PM

Looking at a few examples from logstash,
https://pl.wikipedia.org/w/index.php?title=Trzej_Kr%C3%B3lowie&action=edit&oldid=75738431 (log)
https://de.wikipedia.org/w/index.php?title=Altskandinavischer_Kalender&oldid=255955434 (log)

we can isolate a reproducible case,

λ (master *) cat t
<references>
<ref>
<poem>123</poem>
</ref>
</references>

λ (master *) cat t | php bin/parse.php --integrated --wt2lint
[warn] Expected src for node poem
gerritbot added a comment.Mon, Feb 9, 11:32 PM

Change #1238058 had a related patch set uploaded (by Arlolra; author: Arlolra):

[mediawiki/services/parsoid@master] [WIP] Cleanup after processing embeded docs

https://gerrit.wikimedia.org/r/1238058

gerritbot added a project: Patch-For-Review.Mon, Feb 9, 11:32 PM
ABreault-WMF moved this task from To Verify to Code Review on the Content-Transform-Team (Work In Progress) board.Mon, Feb 9, 11:37 PM
gerritbot added a comment.Tue, Feb 17, 2:54 PM

Change #1239956 had a related patch set uploaded (by OSleger; author: OSleger):

[mediawiki/extensions/Cite@master] Parsoid test: Add lint test for disappearing src attr

https://gerrit.wikimedia.org/r/1239956

gerritbot added a comment.Tue, Feb 17, 4:59 PM

Change #1238058 merged by jenkins-bot:

[mediawiki/services/parsoid@master] Cleanup after processing embeded docs

https://gerrit.wikimedia.org/r/1238058

ABreault-WMF moved this task from Code Review to To Deploy on the Content-Transform-Team (Work In Progress) board.Tue, Feb 17, 5:57 PM
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