Seen after rollout of wmf.18 to group1
Stack:
#0 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(3603): Parser::statelessFetchTemplate(Title, Parser) #1 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(3537): Parser->fetchTemplateAndTitle(Title) #2 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(3297): Parser->getTemplateDom(Title) #3 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Preprocessor_Hash.php(1114): Parser->braceSubstitution(array, PPFrame_Hash) #4 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(2999): PPFrame_Hash->expand(PPNode_Hash_Tree, integer) #5 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(1345): Parser->replaceVariables(string) #6 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(682): Parser->internalParse(string, boolean, boolean) #7 /srv/mediawiki/php-1.32.0-wmf.18/extensions/ProofreadPage/includes/Parser/PagesTagParser.php(326): Parser->recursiveTagParse(string) #8 /srv/mediawiki/php-1.32.0-wmf.18/extensions/ProofreadPage/ProofreadPage.body.php(125): ProofreadPage\Parser\PagesTagParser->render(NULL, array) #9 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(3942): Closure$ProofreadPage::onParserFirstCallInit#2(NULL, array, Parser, PPFrame_Hash) #10 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Preprocessor_Hash.php(1188): Parser->extensionSubstitution(array, PPFrame_Hash) #11 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(2999): PPFrame_Hash->expand(PPNode_Hash_Tree, integer) #12 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(1345): Parser->replaceVariables(string) #13 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(474): Parser->internalParse(string) #14 /srv/mediawiki/php-1.32.0-wmf.18/includes/content/WikitextContent.php(341): Parser->parse(string, Title, ParserOptions, boolean, boolean, integer) #15 /srv/mediawiki/php-1.32.0-wmf.18/includes/content/AbstractContent.php(516): WikitextContent->fillParserOutput(Title, integer, ParserOptions, boolean, ParserOutput) #16 /srv/mediawiki/php-1.32.0-wmf.18/extensions/FlaggedRevs/backend/FlaggedRevs.class.php(642): AbstractContent->getParserOutput(Title, integer, ParserOptions) #17 /srv/mediawiki/php-1.32.0-wmf.18/extensions/FlaggedRevs/backend/FlaggedRevs.class.php(566): FlaggedRevs::parseStableRevision(FlaggedRevision, ParserOptions) #18 /srv/mediawiki/php-1.32.0-wmf.18/includes/poolcounter/PoolCounterWorkViaCallback.php(69): Closure$FlaggedRevs::parseStableRevisionPooled() #19 /srv/mediawiki/php-1.32.0-wmf.18/includes/poolcounter/PoolCounterWork.php(123): PoolCounterWorkViaCallback->doWork() #20 /srv/mediawiki/php-1.32.0-wmf.18/extensions/FlaggedRevs/backend/FlaggedRevs.class.php(582): PoolCounterWork->execute() #21 /srv/mediawiki/php-1.32.0-wmf.18/extensions/FlaggedRevs/frontend/FlaggablePageView.php(749): FlaggedRevs::parseStableRevisionPooled(FlaggedRevision, ParserOptions) #22 /srv/mediawiki/php-1.32.0-wmf.18/extensions/FlaggedRevs/frontend/FlaggablePageView.php(391): FlaggablePageView->showStableVersion(FlaggedRevision, string, string) #23 /srv/mediawiki/php-1.32.0-wmf.18/extensions/FlaggedRevs/frontend/FlaggedRevsUI.hooks.php(204): FlaggablePageView->setPageContent(boolean, boolean) #24 /srv/mediawiki/php-1.32.0-wmf.18/includes/Hooks.php(174): FlaggedRevsUIHooks::onArticleViewHeader(Article, boolean, boolean) #25 /srv/mediawiki/php-1.32.0-wmf.18/includes/Hooks.php(202): Hooks::callHook(string, array, array, NULL) #26 /srv/mediawiki/php-1.32.0-wmf.18/includes/page/Article.php(524): Hooks::run(string, array) #27 /srv/mediawiki/php-1.32.0-wmf.18/includes/actions/ViewAction.php(68): Article->view() #28 /srv/mediawiki/php-1.32.0-wmf.18/includes/MediaWiki.php(501): ViewAction->show() #29 /srv/mediawiki/php-1.32.0-wmf.18/includes/MediaWiki.php(294): MediaWiki->performAction(Article, Title) #30 /srv/mediawiki/php-1.32.0-wmf.18/includes/MediaWiki.php(868): MediaWiki->performRequest() #31 /srv/mediawiki/php-1.32.0-wmf.18/includes/MediaWiki.php(525): MediaWiki->main() #32 /srv/mediawiki/php-1.32.0-wmf.18/index.php(42): MediaWiki->run() #33 /srv/mediawiki/w/index.php(3): include(string) #34 {main}