Wikimedia\Assert\PreconditionException: Precondition failed: This Title instance does not represent a proper page, but merely a link target.
Open, Needs TriagePublicPRODUCTION ERROR
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Authored By

	Dcljr
	Jun 23 2024, 5:30 AM

Description

Steps to replicate the issue (include links if applicable):

Go to the page https://ja.wikibooks.org/wiki/Special:Contributions/Kanjy
See if the following error occurs

What happens?:

I see an "Internal error" like the follwing (two different attempts):

[7734c05e-3f9c-4f6a-aad0-de4c2ef66db2] 2024-06-23 05:09:03: Fatal exception of type "Wikimedia\Assert\PreconditionException"

[15940db0-62ac-4cdf-9b2d-15cb19f665ce] 2024-06-23 05:16:56: Fatal exception of type "Wikimedia\Assert\PreconditionException"

What should have happened instead?:

Should have seen the user's contributions.

Other information (browser name/version, screenshots, etc.):

I see the error using both Vector 2022 and Legacy Vector, so presumably not a skin-related issue. Also, I get the error using both the English (canonical) version of the page name, "Special:Contributions/Kanjy", and the Japanese version, "特別:投稿記録/Kanjy" (i.e., following a "contribs" link on the wiki itself).

Note that the user is an admin on the wiki. I don't see the error for any other admin or normal user I've tried on the wiki. No problem with Kanjy's user page or user talk page, either, nor with Special:Log/Kanjy.

Error

mwversion: 1.43.0-wmf.10
reqId: 7734c05e-3f9c-4f6a-aad0-de4c2ef66db2
Find reqId in Logstash

normalized_message

[{reqId}] {exception_url}   Wikimedia\Assert\PreconditionException: Precondition failed: This Title instance does not represent a proper page, but merely a link target.

exception.trace

from /srv/mediawiki/php-1.43.0-wmf.10/vendor/wikimedia/assert/src/Assert.php(49)
#0 /srv/mediawiki/php-1.43.0-wmf.10/includes/title/Title.php(3834): Wikimedia\Assert\Assert::precondition(boolean, string)
#1 /srv/mediawiki/php-1.43.0-wmf.10/includes/title/Title.php(3815): MediaWiki\Title\Title->assertProperPage()
#2 /srv/mediawiki/php-1.43.0-wmf.10/includes/Revision/RevisionStore.php(1839): MediaWiki\Title\Title->getId(boolean)
#3 /srv/mediawiki/php-1.43.0-wmf.10/includes/Revision/RevisionStore.php(1744): MediaWiki\Revision\RevisionStore->ensureRevisionRowMatchesPage(stdClass, MediaWiki\Title\Title)
#4 /srv/mediawiki/php-1.43.0-wmf.10/includes/Revision/RevisionStore.php(1622): MediaWiki\Revision\RevisionStore->newRevisionFromRowAndSlots(stdClass, NULL, integer, MediaWiki\Title\Title, boolean)
#5 /srv/mediawiki/php-1.43.0-wmf.10/includes/pager/ContributionsPager.php(581): MediaWiki\Revision\RevisionStore->newRevisionFromRow(stdClass, integer, MediaWiki\Title\Title)
#6 /srv/mediawiki/php-1.43.0-wmf.10/includes/pager/ContributionsPager.php(617): MediaWiki\Pager\ContributionsPager->createRevisionRecord(stdClass, MediaWiki\Title\Title)
#7 /srv/mediawiki/php-1.43.0-wmf.10/includes/pager/ReverseChronologicalPager.php(134): MediaWiki\Pager\ContributionsPager->formatRow(stdClass)
#8 /srv/mediawiki/php-1.43.0-wmf.10/includes/pager/IndexPager.php(601): MediaWiki\Pager\ReverseChronologicalPager->getRow(stdClass)
#9 /srv/mediawiki/php-1.43.0-wmf.10/includes/specialpage/ContributionsSpecialPage.php(336): MediaWiki\Pager\IndexPager->getBody()
#10 /srv/mediawiki/php-1.43.0-wmf.10/includes/poolcounter/PoolCounterWorkViaCallback.php(73): MediaWiki\SpecialPage\ContributionsSpecialPage->MediaWiki\SpecialPage\{closure}()
#11 /srv/mediawiki/php-1.43.0-wmf.10/includes/poolcounter/PoolCounterWork.php(171): MediaWiki\PoolCounter\PoolCounterWorkViaCallback->doWork()
#12 /srv/mediawiki/php-1.43.0-wmf.10/includes/specialpage/ContributionsSpecialPage.php(356): MediaWiki\PoolCounter\PoolCounterWork->execute()
#13 /srv/mediawiki/php-1.43.0-wmf.10/includes/specialpage/SpecialPage.php(719): MediaWiki\SpecialPage\ContributionsSpecialPage->execute(string)
#14 /srv/mediawiki/php-1.43.0-wmf.10/includes/specialpage/SpecialPageFactory.php(1694): MediaWiki\SpecialPage\SpecialPage->run(string)
#15 /srv/mediawiki/php-1.43.0-wmf.10/includes/actions/ActionEntryPoint.php(502): MediaWiki\SpecialPage\SpecialPageFactory->executePath(string, MediaWiki\Context\RequestContext)
#16 /srv/mediawiki/php-1.43.0-wmf.10/includes/actions/ActionEntryPoint.php(145): MediaWiki\Actions\ActionEntryPoint->performRequest()
#17 /srv/mediawiki/php-1.43.0-wmf.10/includes/MediaWikiEntryPoint.php(200): MediaWiki\Actions\ActionEntryPoint->execute()
#18 /srv/mediawiki/php-1.43.0-wmf.10/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#19 /srv/mediawiki/w/index.php(3): require(string)
#20 {main}

Impact

Notes

Details

MediaWiki Version: 1.43.0-wmf.10
Request URL: https://ja.wikibooks.org/wiki/%E7%89%B9%E5%88%A5:%E6%8A%95%E7%A8%BF%E8%A8%98%E9%8C%B2/Kanjy

Related Objects

Mentioned In: T361244: Wikimedia\Assert\PreconditionException: Precondition failed: This Title instance does not represent a proper page, but merely a link target.
Mentioned Here: T293839: Set default namespace aliases for projects
rMW093754a27f4b: Merge "Improve responsive images and avoid for inline"

Event Timeline

Dcljr created this task.Jun 23 2024, 5:30 AM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptJun 23 2024, 5:30 AM

Dcljr renamed this task from Internal error: Fatal exception of type "Wikimedia\Assert\PreconditionException to Internal error on jawikibooks: Fatal exception of type "Wikimedia\Assert\PreconditionException".Jun 23 2024, 5:31 AM

Dcljr updated the task description. (Show Details)Jun 23 2024, 5:38 AM

(For the benefit of future readers, the "Related Objects" item above is because I originally cited the software version in my report, which referred to that particular software change. I removed that information when I noticed that verison info is not necessary for reports about Wikimedia-hosted wikis.)

Peachey88 added a project: Wikimedia-production-error.Jun 23 2024, 6:34 AM

Aklapper changed the subtype of this task from "Bug Report" to "Production Error".Jun 23 2024, 8:08 AM

This seems to (only) happen with ?limit=500 on the aforementioned Special:Contributions page.

It's hard to say anything else without a full stack trace or access to one, but codesearching for PreconditionException suggests that it's a case of either "wiki ID mismatch" (don't ask me how that could ever happen...) oder an invalid title of some sort that cannot be properly represented via a Titel object (which seems to me like the more likely case here, sometimes weird stuff gets stored in the DB for whatever reason(s) and that ends up causing issues later on).

Aklapper renamed this task from Internal error on jawikibooks: Fatal exception of type "Wikimedia\Assert\PreconditionException" to Wikimedia\Assert\PreconditionException: Precondition failed: This Title instance does not represent a proper page, but merely a link target..Jun 23 2024, 8:12 AM

Aklapper set Request URL to https://ja.wikibooks.org/wiki/%E7%89%B9%E5%88%A5:%E6%8A%95%E7%A8%BF%E8%A8%98%E9%8C%B2/Kanjy.

Aklapper updated the task description. (Show Details)

Aklapper added a project: MediaWiki-Core-Revision-backend.

Aklapper set Release Version to 1.43.0-wmf.10.

It seems that is page "WB:" - https://ja.wikibooks.org/?curid=12628&uselang=en&redirect=no is visible, but the history page says bad title - https://ja.wikibooks.org/w/index.php?title=WB:&action=history&uselang=en

WB is a namespace alias on wikibooks (T293839)

This can be fixed by running namespaceDupes.php

Aklapper merged a task: T370496: Internal error on b:ja:Special:Contributions/Kanjy: Wikimedia\Assert\PreconditionException: Precondition failed: This Title instance does not represent a proper page, but merely a link target..Fri, Jul 19, 9:23 AM

Aklapper mentioned this in T361244: Wikimedia\Assert\PreconditionException: Precondition failed: This Title instance does not represent a proper page, but merely a link target..

Aklapper added a subscriber: Apple_TD.

Umherirrender unsubscribed.Sun, Jul 21, 8:55 AM

In T368219#9925488, @Bugreporter wrote:

This can be fixed by running namespaceDupes.php

Umm… so do we want to do this?

Running namespaceDupes.php does not fix this since "WB:" is an invalid title.

zabe@mwmaint1002:~$ mwscript namespaceDupes.php jawikibooks
id=12628 ns=0 dbk=WB: *** invalid title and --add-prefix not specified
1 pages to fix, 0 were resolvable.

0 links to fix, 0 were resolvable, 0 were deleted.

Oh noeees
zabe@mwmaint1002:~$

Krinkle added a project: Unstewarded-production-error.Thu, Jul 25, 3:51 PM

Krinkle moved this task from Untriaged to Jun 2024 on the Wikimedia-production-error board.

Wikimedia\Assert\PreconditionException: Precondition failed: This Title instance does not represent a proper page, but merely a link target.Open, Needs TriagePublicPRODUCTION ERRORActions