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Can't move [[mw:Talk:Wikibase/Beta Features/Other projects sidebar]]
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Description

@Jdforrester-WMF tried to move Talk:Wikibase/Beta_Features/Other_projects_sidebar to Talk:Beta_Features/Other_projects_sidebar (which according to the move log, Greg has already done!), but it failed with the following exception:

2015-08-12 18:01:19 mw1168 mediawikiwiki exception ERROR: [7d0c087d] /w/index.php?title=Special:MovePage&action=submit  
Flow\Exception\DataModelException from line 247 of /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Data/Index/FeatureIndex.php:
Unable to find specified offset in query results

[stacktrace]
#0 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Data/Index/FeatureIndex.php(195): Flow\\Data\\Index\\FeatureIndex->getOffsetFromKey(array, string)
#1 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Data/Index/FeatureIndex.php(492): Flow\\Data\\Index\\FeatureIndex->getOffsetLimit(array, array)
#2 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Data/Index/FeatureIndex.php(440): Flow\\Data\\Index\\FeatureIndex->filterResults(array, array)
#3 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Data/ObjectLocator.php(80): Flow\\Data\\Index\\FeatureIndex->findMulti(array, array)
#4 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Data/ObjectLocator.php(55): Flow\\Data\\ObjectLocator->findMulti(array, array)
#5 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Data/Pager/Pager.php(121): Flow\\Data\\ObjectLocator->find(array, array)
#6 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Block/TopicList.php(481): Flow\\Data\\Pager\\Pager->getPage(Closure$Flow\\Block\\TopicListBlock::getPage;2116714285)
#7 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Block/TopicList.php(268): Flow\\Block\\TopicListBlock->getPage(array)
#8 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/View.php(176): Flow\\Block\\TopicListBlock->renderApi(array)
#9 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/View.php(69): Flow\\View->buildApiResponse(Flow\\WorkflowLoader, array, string, array)
#10 /srv/mediawiki/php-1.26wmf18/extensions/Flow/includes/Content/BoardContent.php(191): Flow\\View->show(Flow\\WorkflowLoader, string)
#11 /srv/mediawiki/php-1.26wmf18/includes/page/WikiPage.php(2115): Flow\\Content\\BoardContent->getParserOutput(Title, integer, ParserOptions)
#12 /srv/mediawiki/php-1.26wmf18/includes/page/WikiPage.php(2164): WikiPage->prepareContentForEdit(Flow\\Content\\BoardContent, Revision, User)
#13 /srv/mediawiki/php-1.26wmf18/includes/MovePage.php(501): WikiPage->doEditUpdates(Revision, User, array)
#14 /srv/mediawiki/php-1.26wmf18/includes/MovePage.php(255): MovePage->moveToInternal(User, Title, string, boolean)
#15 /srv/mediawiki/php-1.26wmf18/includes/specials/SpecialMovepage.php(583): MovePage->move(User, string, boolean)
#16 /srv/mediawiki/php-1.26wmf18/includes/specials/SpecialMovepage.php(123): MovePageForm->doSubmit()
#17 /srv/mediawiki/php-1.26wmf18/extensions/Translate/tag/SpecialPageTranslationMovePage.php(135): MovePageForm->execute(NULL)
#18 /srv/mediawiki/php-1.26wmf18/includes/specialpage/SpecialPage.php(384): SpecialPageTranslationMovePage->execute(NULL)
#19 /srv/mediawiki/php-1.26wmf18/includes/specialpage/SpecialPageFactory.php(553): SpecialPage->run(NULL)
#20 /srv/mediawiki/php-1.26wmf18/includes/MediaWiki.php(249): SpecialPageFactory::executePath(Title, RequestContext)
#21 /srv/mediawiki/php-1.26wmf18/includes/MediaWiki.php(677): MediaWiki->performRequest()
#22 /srv/mediawiki/php-1.26wmf18/includes/MediaWiki.php(474): MediaWiki->main()
#23 /srv/mediawiki/php-1.26wmf18/index.php(41): MediaWiki->run()
#24 /srv/mediawiki/w/index.php(3): include(string)
#25 {main}

Note, this is an occupied page, which might be relevant.

Event Timeline

Catrope created this task.Aug 12 2015, 6:15 PM
Catrope raised the priority of this task from to Needs Triage.
Catrope updated the task description. (Show Details)
Catrope added a project: StructuredDiscussions.
Catrope added subscribers: Catrope, Jdforrester-WMF.
Restricted Application added a project: Collaboration-Team-Triage. · View Herald TranscriptAug 12 2015, 6:15 PM
Restricted Application added a subscriber: Aklapper. · View Herald Transcript
Catrope triaged this task as High priority.Aug 12 2015, 11:14 PM

From logs:

https://www.mediawiki.org/w/index.php?title=Special%3ALog&type=delete&user=&page=Talk%3ABeta+Features%2FOther+projects+sidebar&year=&month=-1&tagfilter=

20:48, June 20, 2014 Greg (WMF) (talk | contribs | block) moved page Talk:Wikibase/Beta Features/Other projects sidebar to Talk:Beta Features/Other projects sidebar (moving to be under the normal Beta Features page) (revert)

20:43, August 3, 2015 Web0906400344 (talk | contribs | block) moved page Talk:Beta Features/Other projects sidebar to Talk:Lai0906400344@gmail.com (revert)

20:47, August 3, 2015 Nemo bis (talk | contribs | block) moved page Talk:Lai0906400344@gmail.com to Talk:Beta Features/Other projects sidebar over a redirect without leaving a redirect (revert)

18:01, August 12, 2015 Jdforrester (WMF) (talk | contribs | block) deleted Talk:Beta Features/Other projects sidebar (Deleted to make way for move from "Talk:Wikibase/Beta Features/Other projects sidebar") (view/restore)

So it looks like it was moved, deleted from the new location, then attempted to be moved again. But it's not clear which of those move/deletions were Flow content model (maybe none).