PHP Warning: Undefined property: Wikimedia\Parsoid\NodeData\DataMw::$parts
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	ssastry
	May 18 2026, 4:14 PM

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	F83165917: DataParsoid_wikis.png
	May 21 2026, 12:45 PM
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	F83165663: DataParsoid.png
	May 21 2026, 12:45 PM
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Description

Error

mwversion: 1.47.0-wmf.2
timestamp: 2026-05-16T01:39:28.383Z
phpversion: 8.3.30
reqId: b08b7068-4909-4477-9dc7-f3ec506c0330
Find reqId in Logstash

normalized_message

[{reqId}] {exception_url}   PHP Warning: Undefined property: Wikimedia\Parsoid\NodeData\DataMw::$parts

That comes from src/Wt2Html/DOM/Processors/DOMRangeBuilder.php(1324) which generate 3 warnings:

src/Wt2Html/DOM/Processors/DOMRangeBuilder.php(1431)
PHP Warning: Undefined property: Wikimedia\Parsoid\NodeData\DataParsoid::$pi
src/Wt2Html/DOM/Processors/DOMRangeBuilder.php(1428)
PHP Warning: Undefined property: Wikimedia\Parsoid\NodeData\DataMw::$parts
src/Wt2Html/DOM/Processors/DOMRangeBuilder.php(1433)
PHP Warning: Undefined property: Wikimedia\Parsoid\NodeData\DataParsoid::$dsr

src/Wt2Html/DOM/Processors/DOMRangeBuilder.php

1427             $newRangeDmw = DOMDataUtils::getDataMw( $newRangeStart );
1428             $newRangeDmw->parts = $rangeDmw->parts;
1429             unset( $rangeDmw->parts );
1430             $newRangeDp = DOMDataUtils::getDataParsoid( $newRangeStart );
1431             $newRangeDp->pi = $rangeDp->pi;
1432             unset( $rangeDp->pi );
1433             $newRangeDp->dsr = $rangeDp->dsr;
1434             unset( $rangeDp->dsr );

7 days view search for DataParsoid on mediawiki-errors dashboard. Hits and affected wikis:

Frame	Location	Call
from	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/DOMRangeBuilder.php(1432)
#0	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/DOMRangeBuilder.php(1432)	MediaWiki\Exception\MWExceptionHandler::handleError(int, string, string, int)
#1	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/DOMRangeBuilder.php(1328)	Wikimedia\Parsoid\Wt2Html\DOM\Processors\DOMRangeBuilder->handleFirstRenderingTransparentNode(Wikimedia\Parsoid\DOM\Element, Wikimedia\Parsoid\Wt2Html\DOM\Processors\DOMRangeInfo)
#2	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Utils/DOMTraverser.php(143)	Wikimedia\Parsoid\Wt2Html\DOM\Processors\DOMRangeBuilder->Wikimedia\Parsoid\Wt2Html\DOM\Processors\{closure}(Wikimedia\Parsoid\DOM\Element, null)
#3	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Utils/DOMTraverser.php(221)	Wikimedia\Parsoid\Utils\DOMTraverser->callHandlers(Wikimedia\Parsoid\DOM\Element, null, null)
#4	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Utils/DOMTraverser.php(235)	Wikimedia\Parsoid\Utils\DOMTraverser->traverseInternal(bool, null, Wikimedia\Parsoid\DOM\Element, null)
#5	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Utils/DOMTraverser.php(177)	Wikimedia\Parsoid\Utils\DOMTraverser->traverseInternal(bool, null, Wikimedia\Parsoid\DOM\Element, null)
#6	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/DOMRangeBuilder.php(1343)	Wikimedia\Parsoid\Utils\DOMTraverser->traverse(null, Wikimedia\Parsoid\DOM\Element)
#7	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/DOMRangeBuilder.php(1068)	Wikimedia\Parsoid\Wt2Html\DOM\Processors\DOMRangeBuilder->handleRenderingTransparentEltsBetweenBlocks(Wikimedia\Parsoid\Wt2Html\DOM\Processors\DOMRangeInfo)
#8	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/DOMRangeBuilder.php(1276)	Wikimedia\Parsoid\Wt2Html\DOM\Processors\DOMRangeBuilder->encapsulateTemplates(array)
#9	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Wt2Html/DOM/Processors/WrapTemplates.php(26)	Wikimedia\Parsoid\Wt2Html\DOM\Processors\DOMRangeBuilder->execute(Wikimedia\Parsoid\DOM\Element)
#10	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Wt2Html/DOMProcessorPipeline.php(131)	Wikimedia\Parsoid\Wt2Html\DOM\Processors\WrapTemplates->run(Wikimedia\Parsoid\Config\Env, Wikimedia\Parsoid\DOM\Element, array, bool)
#11	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Wt2Html/DOMProcessorPipeline.php(175)	Wikimedia\Parsoid\Wt2Html\DOMProcessorPipeline->doPostProcess(Wikimedia\Parsoid\DOM\Element)
#12	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Wt2Html/DOMProcessorPipeline.php(188)	Wikimedia\Parsoid\Wt2Html\DOMProcessorPipeline->process(Wikimedia\Parsoid\DOM\Element, array)
#13	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Wt2Html/ParserPipeline.php(159)	Wikimedia\Parsoid\Wt2Html\DOMProcessorPipeline->processChunkily(Wikimedia\Parsoid\DOM\Element, array)
#14	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Wt2Html/ParserPipeline.php(181)	Wikimedia\Parsoid\Wt2Html\ParserPipeline->processPipelineStages(array, string, array)
#15	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Wt2Html/ParserPipelineFactory.php(622)	Wikimedia\Parsoid\Wt2Html\ParserPipeline->parseChunkily(string, array)
#16	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Wikitext/ContentModelHandler.php(188)	Wikimedia\Parsoid\Wt2Html\ParserPipelineFactory->parse(string)
#17	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Parsoid.php(204)	Wikimedia\Parsoid\Wikitext\ContentModelHandler->toDOM(Wikimedia\Parsoid\Ext\ParsoidExtensionAPI, null)
#18	/srv/mediawiki/php-1.47.0-wmf.2/vendor/wikimedia/parsoid/src/Parsoid.php(270)	Wikimedia\Parsoid\Parsoid->parseWikitext(MediaWiki\Parser\Parsoid\Config\PageConfig, MediaWiki\Parser\ParserOutput, array, null)
#19	/srv/mediawiki/php-1.47.0-wmf.2/includes/Parser/Parsoid/ParsoidParser.php(146)	Wikimedia\Parsoid\Parsoid->wikitext2html(MediaWiki\Parser\Parsoid\Config\PageConfig, array, null, MediaWiki\Parser\ParserOutput)
#20	/srv/mediawiki/php-1.47.0-wmf.2/includes/Parser/Parsoid/ParsoidParser.php(280)	MediaWiki\Parser\Parsoid\ParsoidParser->genParserOutput(MediaWiki\Parser\Parsoid\Config\PageConfig, MediaWiki\Parser\ParserOptions, null)
#21	/srv/mediawiki/php-1.47.0-wmf.2/includes/Content/WikitextContentHandler.php(360)	MediaWiki\Parser\Parsoid\ParsoidParser->parse(string, MediaWiki\Title\Title, MediaWiki\Parser\ParserOptions, bool, bool, int, null)
#22	/srv/mediawiki/php-1.47.0-wmf.2/includes/Content/ContentHandler.php(1574)	MediaWiki\Content\WikitextContentHandler->fillParserOutput(MediaWiki\Content\WikitextContent, MediaWiki\Content\Renderer\ContentParseParams, MediaWiki\Parser\ParserOutput)
#23	/srv/mediawiki/php-1.47.0-wmf.2/includes/Content/Renderer/ContentRenderer.php(62)	MediaWiki\Content\ContentHandler->getParserOutput(MediaWiki\Content\WikitextContent, MediaWiki\Content\Renderer\ContentParseParams)
#24	/srv/mediawiki/php-1.47.0-wmf.2/includes/Revision/RenderedRevision.php(246)	MediaWiki\Content\Renderer\ContentRenderer->getParserOutput(MediaWiki\Content\WikitextContent, MediaWiki\Page\PageIdentityValue, MediaWiki\Revision\RevisionStoreRecord, MediaWiki\Parser\ParserOptions, array)
#25	/srv/mediawiki/php-1.47.0-wmf.2/includes/Revision/RenderedRevision.php(219)	MediaWiki\Revision\RenderedRevision->getSlotParserOutputUncached(MediaWiki\Content\WikitextContent, array)
#26	/srv/mediawiki/php-1.47.0-wmf.2/includes/Revision/RevisionRenderer.php(226)	MediaWiki\Revision\RenderedRevision->getSlotParserOutput(string, array)
#27	/srv/mediawiki/php-1.47.0-wmf.2/includes/Revision/RevisionRenderer.php(159)	MediaWiki\Revision\RevisionRenderer->combineSlotOutput(MediaWiki\Revision\RenderedRevision, MediaWiki\Parser\ParserOptions, array)
#28	/srv/mediawiki/php-1.47.0-wmf.2/includes/Revision/RenderedRevision.php(182)	MediaWiki\Revision\RevisionRenderer->MediaWiki\Revision\{closure}(MediaWiki\Revision\RenderedRevision, array)
#29	/srv/mediawiki/php-1.47.0-wmf.2/includes/Page/ParserOutputAccess.php(593)	MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#30	/srv/mediawiki/php-1.47.0-wmf.2/includes/Page/ParserOutputAccess.php(508)	MediaWiki\Page\ParserOutputAccess->renderRevision(MediaWiki\Page\WikiPage, MediaWiki\Parser\ParserOptions, MediaWiki\Revision\RevisionStoreRecord, array, null)
#31	/srv/mediawiki/php-1.47.0-wmf.2/includes/Page/ParserOutputAccess.php(582)	MediaWiki\Page\ParserOutputAccess->getParserOutput(MediaWiki\Page\WikiPage, MediaWiki\Parser\ParserOptions, MediaWiki\Revision\RevisionStoreRecord, array)
#32	/srv/mediawiki/php-1.47.0-wmf.2/includes/Page/ParserOutputAccess.php(684)	MediaWiki\Page\ParserOutputAccess->renderRevision(MediaWiki\Page\WikiPage, MediaWiki\Parser\ParserOptions, MediaWiki\Revision\RevisionStoreRecord, array)
#33	/srv/mediawiki/php-1.47.0-wmf.2/includes/PoolCounter/PoolCounterWorkViaCallback.php(68)	MediaWiki\Page\ParserOutputAccess->MediaWiki\Page\{closure}()
#34	/srv/mediawiki/php-1.47.0-wmf.2/includes/PoolCounter/PoolCounterWork.php(159)	MediaWiki\PoolCounter\PoolCounterWorkViaCallback->doWork()
#35	/srv/mediawiki/php-1.47.0-wmf.2/includes/Page/ParserOutputAccess.php(498)	MediaWiki\PoolCounter\PoolCounterWork->execute()
#36	/srv/mediawiki/php-1.47.0-wmf.2/includes/Page/Article.php(882)	MediaWiki\Page\ParserOutputAccess->getParserOutput(MediaWiki\Page\WikiPage, MediaWiki\Parser\ParserOptions, MediaWiki\Revision\RevisionStoreRecord, array)
#37	/srv/mediawiki/php-1.47.0-wmf.2/includes/Page/Article.php(543)	MediaWiki\Page\Article->generateContentOutput(MediaWiki\User\User, MediaWiki\Parser\ParserOptions, int, MediaWiki\Output\OutputPage, array)
#38	/srv/mediawiki/php-1.47.0-wmf.2/includes/Actions/ViewAction.php(71)	MediaWiki\Page\Article->view()
#39	/srv/mediawiki/php-1.47.0-wmf.2/includes/Actions/ActionEntryPoint.php(753)	MediaWiki\Actions\ViewAction->show()
#40	/srv/mediawiki/php-1.47.0-wmf.2/includes/Actions/ActionEntryPoint.php(511)	MediaWiki\Actions\ActionEntryPoint->performAction(MediaWiki\Page\Article, MediaWiki\Title\Title)
#41	/srv/mediawiki/php-1.47.0-wmf.2/includes/Actions/ActionEntryPoint.php(145)	MediaWiki\Actions\ActionEntryPoint->performRequest()
#42	/srv/mediawiki/php-1.47.0-wmf.2/includes/MediaWikiEntryPoint.php(180)	MediaWiki\Actions\ActionEntryPoint->execute()
#43	/srv/mediawiki/php-1.47.0-wmf.2/index.php(44)	MediaWiki\MediaWikiEntryPoint->run()
#44	/srv/mediawiki/w/index.php(3)	require(string)
#45	{main}

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Notes

Details

Request URL: https://vi.wikipedia.org/wiki/Th%C3%A0nh_vi%C3%AAn:Nakon/cascade2

Related Changes in Gerrit:

Subject	Author	Repo	Branch	Lines +/-
Bump wikimedia/parsoid to 0.24.0-a5	Arlolra	mediawiki/vendor	master	+3 K -2 K
DOMRangeBuilder: Refactor handleFirstRenderingTransparentNode a bit	Subramanya Sastry	mediawiki/services/parsoid	master	+15 -13
DOMRangeBuilder: Guard against undefined properties in handleFirstRenderingTransparentNode	Kwtbmmrnwnymy0	mediawiki/services/parsoid	master	+12 -6
DOMRangeBuilder: Don't stash mw:Param* metas	Subramanya Sastry	mediawiki/services/parsoid	master	+40 -15
DOMRangeBuilder: Guard against undefined properties in handleFirstRenderingTransparentNode	Kwtbmmrnwnymy0	mediawiki/vendor	master	+12 -6

Customize query in gerrit

Related Objects

Mentioned In: T427098: mw:Param meta tags can sometimes leak through unprocessed
T426325: PHP Warning: Undefined property: Wikimedia\Parsoid\NodeData\DataParsoid::${dsr,tsr,pi}

Event Timeline

ssastry created this task.May 18 2026, 4:14 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptMay 18 2026, 4:14 PM

Looked back 6 weeks in logstash, and this first showed up May 2.

ssastry mentioned this in T426325: PHP Warning: Undefined property: Wikimedia\Parsoid\NodeData\DataParsoid::${dsr,tsr,pi}.May 18 2026, 5:16 PM

ssastry merged a task: T426325: PHP Warning: Undefined property: Wikimedia\Parsoid\NodeData\DataParsoid::${dsr,tsr,pi}.

ssastry added a subscriber: • thcipriani.

• hashar merged a task: T426956: PHP Warning: Undefined property: Wikimedia\Parsoid\NodeData\DataParsoid::$pi.May 21 2026, 12:42 PM

• hashar subscribed.

• hashar updated the task description. (Show Details)May 21 2026, 12:45 PM

Change #1290765 had a related patch set uploaded (by Kwtbmmrnwnymy0; author: Kwtbmmrnwnymy0):

[mediawiki/vendor@master] DOMRangeBuilder: Guard against undefined properties in handleFirstRenderingTransparentNode

https://gerrit.wikimedia.org/r/1290765

gerritbot added a project: Patch-For-Review.May 21 2026, 1:31 PM

Change #1290824 had a related patch set uploaded (by Kwtbmmrnwnymy0; author: Kwtbmmrnwnymy0):

[mediawiki/services/parsoid@master] DOMRangeBuilder: Guard against undefined properties in handleFirstRenderingTransparentNode

https://gerrit.wikimedia.org/r/1290824

Change #1290765 abandoned by Kwtbmmrnwnymy0:

[mediawiki/vendor@master] DOMRangeBuilder: Guard against undefined properties in handleFirstRenderingTransparentNode

Reason:

per above

https://gerrit.wikimedia.org/r/1290765

Change #1290911 had a related patch set uploaded (by Subramanya Sastry; author: Subramanya Sastry):

[mediawiki/services/parsoid@master] WIP: Transfer data-mw only if migrated node was first node of transclusion

https://gerrit.wikimedia.org/r/1290911

Change #1290919 had a related patch set uploaded (by Subramanya Sastry; author: Subramanya Sastry):

[mediawiki/services/parsoid@master] WIP: DOMRangeBuilder: Don't stash mw:Param* metas

https://gerrit.wikimedia.org/r/1290919

Interestingly enough, in all the cases I've looked at so far (uk, ml, de, sl), mw:Param nodes are involved .. so, the 2nd patch will fix this on its own, but the first patch is also worth reviewing on its own.

Okay, turns out that the second patch is the correct fix and the first one is now just a refactor.

ssastry mentioned this in T427098: mw:Param meta tags can sometimes leak through unprocessed.May 22 2026, 9:48 PM

Change #1290919 merged by jenkins-bot:

[mediawiki/services/parsoid@master] DOMRangeBuilder: Don't stash mw:Param* metas

https://gerrit.wikimedia.org/r/1290919

ABreault-WMF assigned this task to ssastry.May 22 2026, 10:21 PM

ABreault-WMF triaged this task as Medium priority.

ABreault-WMF edited projects, added: Content-Transform-Team (Work In Progress); removed: Content-Transform-Team.

ABreault-WMF moved this task from Backlog to To Deploy on the Content-Transform-Team (Work In Progress) board.

Change #1290824 abandoned by Arlolra:

[mediawiki/services/parsoid@master] DOMRangeBuilder: Guard against undefined properties in handleFirstRenderingTransparentNode

Reason: