Maniphest T419895

UnexpectedValueException: Default '"sh-latn"' is invalid for preference variant of user [user]
Closed, ResolvedPublicPRODUCTION ERROR
Actions

Assigned To

None

Authored By

	brennen
	Mar 12 2026, 7:14 PM

Description

Error

service.version: 1.46.0-wmf.19
timestamp: 2026-03-12T19:07:17.612Z
labels.phpversion: 8.3.30
trace.id: 019829c3-814d-4d44-8fbb-2dda374d6cdf
Find trace.id in Logstash

labels.normalized_message

[{reqId}] {exception_url}   UnexpectedValueException: Default '"sh-latn"' is invalid for preference variant of user [user]

Frame	Location	Call
from	/srv/mediawiki/php-1.46.0-wmf.19/includes/Preferences/DefaultPreferencesFactory.php(350)
#0	/srv/mediawiki/php-1.46.0-wmf.19/includes/Preferences/DefaultPreferencesFactory.php(258)	MediaWiki\Preferences\DefaultPreferencesFactory->loadPreferenceValues(MediaWiki\User\User, MediaWiki\Context\DerivativeContext, array)
#1	/srv/mediawiki/php-1.46.0-wmf.19/extensions/GlobalPreferences/includes/GlobalPreferencesFactory.php(168)	MediaWiki\Preferences\DefaultPreferencesFactory->getFormDescriptor(MediaWiki\User\User, MediaWiki\Context\DerivativeContext)
#2	/srv/mediawiki/php-1.46.0-wmf.19/includes/Preferences/DefaultPreferencesFactory.php(2193)	GlobalPreferences\GlobalPreferencesFactory->getFormDescriptor(MediaWiki\User\User, MediaWiki\Context\DerivativeContext)
#3	/srv/mediawiki/php-1.46.0-wmf.19/includes/Api/ApiOptionsBase.php(100)	MediaWiki\Preferences\DefaultPreferencesFactory->getResetKinds(MediaWiki\User\User, MediaWiki\Context\DerivativeContext, array)
#4	/srv/mediawiki/php-1.46.0-wmf.19/includes/Api/ApiMain.php(2059)	MediaWiki\Api\ApiOptionsBase->execute()
#5	/srv/mediawiki/php-1.46.0-wmf.19/includes/Api/ApiMain.php(964)	MediaWiki\Api\ApiMain->executeAction()
#6	/srv/mediawiki/php-1.46.0-wmf.19/includes/Api/ApiMain.php(935)	MediaWiki\Api\ApiMain->executeActionWithErrorHandling()
#7	/srv/mediawiki/php-1.46.0-wmf.19/includes/Api/ApiEntryPoint.php(138)	MediaWiki\Api\ApiMain->execute()
#8	/srv/mediawiki/php-1.46.0-wmf.19/includes/MediaWikiEntryPoint.php(180)	MediaWiki\Api\ApiEntryPoint->execute()
#9	/srv/mediawiki/php-1.46.0-wmf.19/api.php(30)	MediaWiki\MediaWikiEntryPoint->run()
#10	/srv/mediawiki/w/api.php(3)	require(string)
#11	{main}

Notes

Seeing these for one user of shwiki in 1.46.0-wmf.19 (T413810). Unclear if this is new or a longstanding issue, but I would expect to eventually see it for more users if it was caused by this train.

Details

Request URL: https://sh.wikipedia.org/w/api.php

Related Changes in Gerrit:

Subject	Repo	Branch	Lines +/-
SpecialPreferences: Use Language Select Widget in language and variant fields	mediawiki/core	master	+23 -11
Revert "SpecialPreferences: Use Language Select Widget in language field"	mediawiki/core	master	+8 -18
Revert "SpecialPreferences: Use Language Select Widget in language field"	mediawiki/core	wmf/1.46.0-wmf.20	+8 -18
Revert "SpecialPreferences: Use Language Select Widget in language field"	mediawiki/core	wmf/1.46.0-wmf.19	+8 -18

Customize query in gerrit

Related Objects
Search...

		Status	Subtype	Assigned	Task
		Resolved		hueitan	T418707 SpecialPreferencesPage: Use Language Select Widget
		Resolved	PRODUCTION ERROR	None	T419895 UnexpectedValueException: Default '"sh-latn"' is invalid for preference variant of user [user]

Event Timeline

brennen created this task.Mar 12 2026, 7:14 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptMar 12 2026, 7:14 PM

@brennen: This issue is new, it prevents Serbo-Croatian project editors from accessing their settings. Please address this issue ASAP. Is there any possible way to access settings on the project (through some URL parameters) before this fatal error gets fixed?

Confirming this affects all attempts to use https://sh.wikipedia.org/wiki/Special:Preferences, and attempts to use the options API to set preferences.

Reverting https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1230707 fixes it for me locally

Change #1254886 had a related patch set uploaded (by SomeRandomDeveloper; author: SomeRandomDeveloper):

[mediawiki/core@master] Revert "SpecialPreferences: Use Language Select Widget in language field"

https://gerrit.wikimedia.org/r/1254886

gerritbot added a project: Patch-For-Review.Mar 18 2026, 11:46 AM

Bugreporter2 awarded a token.Mar 18 2026, 11:47 AM

Not sure if anything depends on this change or if there is an easier fix though. CCing path author and reviewer

@Vipz: The reporter of an issue is often not the developer who can fix the issue, so I think you're addressing the wrong person :)

Change #1254890 had a related patch set uploaded (by SomeRandomDeveloper; author: SomeRandomDeveloper):

[mediawiki/core@wmf/1.46.0-wmf.20] Revert "SpecialPreferences: Use Language Select Widget in language field"

https://gerrit.wikimedia.org/r/1254890

Change #1254891 had a related patch set uploaded (by SomeRandomDeveloper; author: SomeRandomDeveloper):

[mediawiki/core@wmf/1.46.0-wmf.19] Revert "SpecialPreferences: Use Language Select Widget in language field"

https://gerrit.wikimedia.org/r/1254891

shwiki is in group 2 so ideally we should also backport this to wmf.19 so it can be fixed today already.

As the contributor who made this change recently, i don't spot any error for now, but if revert works let's do it first.

In T419895#11722581, @hueitan wrote:

As the contributor who made this change recently, i don't spot any error for now, but if revert works let's do it first.

You probably need to set your content language to what this particular wiki uses which is 'sh'

matmarex subscribed.Mar 18 2026, 1:02 PM

Change #1254891 merged by jenkins-bot:

[mediawiki/core@wmf/1.46.0-wmf.19] Revert "SpecialPreferences: Use Language Select Widget in language field"

https://gerrit.wikimedia.org/r/1254891

Change #1254890 merged by jenkins-bot:

[mediawiki/core@wmf/1.46.0-wmf.20] Revert "SpecialPreferences: Use Language Select Widget in language field"

https://gerrit.wikimedia.org/r/1254890

Mentioned in SAL (#wikimedia-operations) [2026-03-18T13:22:25Z] <sgimeno@deploy2002> Started scap sync-world: Backport for [[gerrit:1254894|loggedOutWarning: dont set the schema for experiment events (T420451)]], [[gerrit:rEUME12548956f855|loggedOutWarning: dont set the schema for experiment events (T420451)]], [[gerrit:1254891|Revert "SpecialPreferences: Use Language Select Widget in language field" (T419895)]], [[gerrit:1254890|Revert "SpecialPreferences: Use Language Select Widget in lang

Mentioned in SAL (#wikimedia-operations) [2026-03-18T13:24:32Z] <sgimeno@deploy2002> somerandomdeveloper, sgimeno: Backport for [[gerrit:1254894|loggedOutWarning: dont set the schema for experiment events (T420451)]], [[gerrit:rEUME12548956f855|loggedOutWarning: dont set the schema for experiment events (T420451)]], [[gerrit:1254891|Revert "SpecialPreferences: Use Language Select Widget in language field" (T419895)]], [[gerrit:1254890|Revert "SpecialPreferences: Use Language Select Widget in

Mentioned in SAL (#wikimedia-operations) [2026-03-18T13:28:48Z] <sgimeno@deploy2002> Finished scap sync-world: Backport for [[gerrit:1254894|loggedOutWarning: dont set the schema for experiment events (T420451)]], [[gerrit:rEUME12548956f855|loggedOutWarning: dont set the schema for experiment events (T420451)]], [[gerrit:1254891|Revert "SpecialPreferences: Use Language Select Widget in language field" (T419895)]], [[gerrit:1254890|Revert "SpecialPreferences: Use Language Select Widget in lan

Settings are working again for me on Serbo-Croatian projects, thank you all for addressing the issue relatively quickly!

ReleaseTaggerBot added a project: MW-1.46-notes (1.46.0-wmf.20; 2026-03-17).Mar 18 2026, 2:00 PM

Change #1254886 merged by jenkins-bot:

[mediawiki/core@master] Revert "SpecialPreferences: Use Language Select Widget in language field"

https://gerrit.wikimedia.org/r/1254886

matmarex closed this task as Resolved.Mar 18 2026, 2:15 PM

Maintenance_bot removed a project: Patch-For-Review.Mar 18 2026, 2:33 PM

ReleaseTaggerBot edited projects, added MW-1.46-notes (1.46.0-wmf.21; 2026-03-24); removed MW-1.46-notes (1.46.0-wmf.20; 2026-03-17).Mar 18 2026, 3:00 PM

Nikerabbit added a parent task: T418707: SpecialPreferencesPage: Use Language Select Widget.Mar 19 2026, 8:12 AM

Change #1258646 had a related patch set uploaded (by Huei Tan; author: Huei Tan):

[mediawiki/core@master] SpecialPreferences: Use Language Select Widget in language and variant fields

https://gerrit.wikimedia.org/r/1258646

gerritbot added a project: Patch-For-Review.Mar 23 2026, 6:57 AM

An update (patch), the issue is came from the LanguageCode::bcp47 that we don't need when using the new language selector in the variant field.

Tested locally

UPDATE: after few more testing, the above fix isn't true, will update if solution found.

Change #1258646 merged by jenkins-bot:

[mediawiki/core@master] SpecialPreferences: Use Language Select Widget in language and variant fields

https://gerrit.wikimedia.org/r/1258646

ReleaseTaggerBot edited projects, added MW-1.46-notes (1.46.0-wmf.26; 2026-04-28); removed MW-1.46-notes (1.46.0-wmf.21; 2026-03-24).Apr 20 2026, 12:00 PM

Maintenance_bot removed a project: Patch-For-Review.Apr 20 2026, 12:32 PM

	F73478945: image.png
	Mar 23 2026, 7:05 AM

UnexpectedValueException: Default '"sh-latn"' is invalid for preference variant of user [user]Closed, ResolvedPublicPRODUCTION ERRORActions