When I visit https://en.wikipedia.beta.wmflabs.org/w/index.php?search=weak+power+law&title=Special%3ASearch&profile=advanced&fulltext=1&advancedSearch-current=%7B%22fields%22%3A%7B%22phrase%22%3A%22weak+power+law%22%7D%7D&ns0=1&ns1=1&ns2=1&ns3=1&ns4=1&ns5=1&ns6=1&ns7=1&ns8=1&ns9=1&ns10=1&ns11=1&ns12=1&ns13=1&ns14=1&ns15=1&ns100=1&ns101=1&ns108=1&ns109=1&ns118=1&ns119=1&ns190=1&ns191=1&ns446=1&ns447=1&ns482=1&ns483=1&ns710=1&ns711=1&ns810=1&ns811=1&ns828=1&ns829=1&ns2300=1&ns2301=1&ns2302=1&ns2303=1&ns5500=1&ns5501=1
I also see the error Uncaught Error: Widget not found in my JS console.
Backtrace: from /srv/mediawiki/php-master/extensions/CirrusSearch/includes/Search/Rescore/NamespacesFunctionScoreBuilder.php(54) #0 /srv/mediawiki/php-master/extensions/CirrusSearch/includes/Search/Rescore/FunctionScoreChain.php(163): CirrusSearch\Search\Rescore\NamespacesFunctionScoreBuilder->__construct(CirrusSearch\HashSearchConfig, array, integer) #1 /srv/mediawiki/php-master/extensions/CirrusSearch/includes/Search/Rescore/FunctionScoreChain.php(109): CirrusSearch\Search\Rescore\FunctionScoreChain->getImplementation(array) #2 /srv/mediawiki/php-master/extensions/CirrusSearch/includes/Search/Rescore/RescoreBuilder.php(122): CirrusSearch\Search\Rescore\FunctionScoreChain->buildRescoreQuery() #3 /srv/mediawiki/php-master/extensions/CirrusSearch/includes/Search/Rescore/RescoreBuilder.php(100): CirrusSearch\Search\Rescore\RescoreBuilder->buildRescoreQuery(array) #4 /srv/mediawiki/php-master/extensions/CirrusSearch/includes/Search/SearchContext.php(531): CirrusSearch\Search\Rescore\RescoreBuilder->build() #5 /srv/mediawiki/php-master/extensions/CirrusSearch/includes/Search/SearchRequestBuilder.php(98): CirrusSearch\Search\SearchContext->getRescore() #6 /srv/mediawiki/php-master/extensions/CirrusSearch/includes/Searcher.php(488): CirrusSearch\Search\SearchRequestBuilder->build() #7 /srv/mediawiki/php-master/extensions/CirrusSearch/includes/InterwikiSearcher.php(99): CirrusSearch\Searcher->buildSearch() #8 /srv/mediawiki/php-master/extensions/CirrusSearch/includes/CirrusSearch.php(316): CirrusSearch\InterwikiSearcher->getInterwikiResults(CirrusSearch\Search\SearchQuery) #9 /srv/mediawiki/php-master/extensions/CirrusSearch/includes/CirrusSearch.php(269): CirrusSearch\CirrusSearch->searchTextReal(CirrusSearch\Search\SearchQuery) #10 /srv/mediawiki/php-master/includes/search/SearchEngine.php(95): CirrusSearch\CirrusSearch->doSearchText(string) #11 /srv/mediawiki/php-master/includes/search/SearchEngine.php(187): SearchEngine->{closure}() #12 /srv/mediawiki/php-master/includes/search/SearchEngine.php(96): SearchEngine->maybePaginate(Closure) #13 /srv/mediawiki/php-master/includes/specials/SpecialSearch.php(445): SearchEngine->searchText(string) #14 /srv/mediawiki/php-master/includes/specials/SpecialSearch.php(229): SpecialSearch->showResults(string) #15 /srv/mediawiki/php-master/includes/specialpage/SpecialPage.php(646): SpecialSearch->execute(NULL) #16 /srv/mediawiki/php-master/includes/specialpage/SpecialPageFactory.php(1375): SpecialPage->run(NULL) #17 /srv/mediawiki/php-master/includes/MediaWiki.php(309): MediaWiki\SpecialPage\SpecialPageFactory->executePath(Title, RequestContext) #18 /srv/mediawiki/php-master/includes/MediaWiki.php(925): MediaWiki->performRequest() #19 /srv/mediawiki/php-master/includes/MediaWiki.php(547): MediaWiki->main() #20 /srv/mediawiki/php-master/index.php(53): MediaWiki->run() #21 /srv/mediawiki/php-master/index.php(46): wfIndexMain() #22 /srv/mediawiki/w/index.php(3): require(string) #23 {main}
On such pages the JS shouldn't be executed at all. The client perhaps should consider this as part of it's startup execution.