Section edit links appear in wrong user interface language on Parsoid Read View wikis
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	cscott
	Dec 19 2025, 3:50 PM

Description

Actually for any wikis with the postprocessing cache turned on.

The root cause seems to be that the Skin is accessing the user interface language without getting it from ParserOptions, so the userLang is not marked as 'used'.

User reports at

https://www.mediawiki.org/wiki/Parsoid/Feedback#c-SSastry_(WMF)-20251219153800-Valepert-20251219143600

Details

Related Changes in Gerrit:

Subject	Repo	Branch	Lines +/-
OutputTransform: Mark user interface language as "used" in appropriate spots	mediawiki/core	master	+38 -21
Ensure that user interface language is "used" by postprocessing pipeline	mediawiki/core	master	+7 -0
Ensure that user interface language is "used" by postprocessing pipeline	mediawiki/core	wmf/1.46.0-wmf.7	+7 -0

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Related Objects
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Status	Subtype	Assigned	Task
Open		None	T305161 Hard-deprecate and remove @deprecated methods from ParserOutput
Open		ihurbain	T372592 Find a way to replace the use of ParserOutput::addJsConfigVars() in DiscussionTools
Open		ihurbain	T376183 Use postprocessing cache for Discussion Tools
Resolved		ihurbain	T380516 Introduce ParserOptions type for "propagated to ParserOutput but not otherwise affecting the parse"
Open		None	T363496 Collapsable sections split the parser cache
Resolved		ihurbain	T293512 ParserOutput::getText() should be removed from ParserOutput
Open		None	T392227 [EPIC] Parsoid Performance
Resolved		ihurbain	T348255 Parser cache infrastructure for OutputTransform
Open		ihurbain	T410916 Allow requesting postprocessed output for some/many/most/all APIs which accept a ParserOption (in some form) and emit a ParserOutput (in some form)
Resolved		ihurbain	T410919 Allow ParserOutputAccess to generate (and cache) postprocessed output for use in Article read views
Resolved	Release	dancy	T408277 1.46.0-wmf.7 deployment blockers
Resolved		cscott	T413227 Section edit links appear in wrong user interface language on Parsoid Read View wikis

Event Timeline

cscott created this task.Dec 19 2025, 3:50 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptDec 19 2025, 3:50 PM

Change #1219884 had a related patch set uploaded (by C. Scott Ananian; author: C. Scott Ananian):

[mediawiki/core@master] Ensure that user interface language is "used" by postprocessing pipeline

https://gerrit.wikimedia.org/r/1219884

gerritbot added a project: Patch-For-Review.Dec 19 2025, 3:51 PM

Change #1219887 had a related patch set uploaded (by C. Scott Ananian; author: C. Scott Ananian):

[mediawiki/core@master] OutputTransform: Mark user interface language as "used" in appropriate spots

https://gerrit.wikimedia.org/r/1219887

Change #1219904 had a related patch set uploaded (by C. Scott Ananian; author: C. Scott Ananian):

[mediawiki/core@wmf/1.46.0-wmf.7] Ensure that user interface language is "used" by postprocessing pipeline

https://gerrit.wikimedia.org/r/1219904

Change #1219884 merged by jenkins-bot:

[mediawiki/core@master] Ensure that user interface language is "used" by postprocessing pipeline

https://gerrit.wikimedia.org/r/1219884

cscott added a parent task: T408277: 1.46.0-wmf.7 deployment blockers.Dec 19 2025, 5:14 PM

cscott updated the task description. (Show Details)Dec 19 2025, 5:19 PM

Change #1219904 merged by jenkins-bot:

[mediawiki/core@wmf/1.46.0-wmf.7] Ensure that user interface language is "used" by postprocessing pipeline

https://gerrit.wikimedia.org/r/1219904

Mentioned in SAL (#wikimedia-operations) [2025-12-19T17:36:03Z] <cscott@deploy2002> Started scap sync-world: Backport for [[gerrit:1219904|Ensure that user interface language is "used" by postprocessing pipeline (T413227)]]

Mentioned in SAL (#wikimedia-operations) [2025-12-19T17:38:03Z] <cscott@deploy2002> cscott: Backport for [[gerrit:1219904|Ensure that user interface language is "used" by postprocessing pipeline (T413227)]] synced to the testservers (see https://wikitech.wikimedia.org/wiki/Mwdebug). Changes can now be verified there.

Mentioned in SAL (#wikimedia-operations) [2025-12-19T17:45:10Z] <cscott@deploy2002> Finished scap sync-world: Backport for [[gerrit:1219904|Ensure that user interface language is "used" by postprocessing pipeline (T413227)]] (duration: 09m 07s)

cscott closed this task as Resolved.Dec 19 2025, 9:56 PM

cscott added a parent task: T410919: Allow ParserOutputAccess to generate (and cache) postprocessed output for use in Article read views.

Change #1219887 merged by jenkins-bot: