Steps to replicate the issue (include links if applicable):
Displaytitle breaks resourceloader.
What happens?:
load.php code will not load, stack trace:
Sessions are disabled for load entry point in /var/www/html/includes/session/SessionManager.php:900
Stack trace:
#0 /var/www/html/includes/session/SessionManager.php(248): MediaWiki\Session\SessionManager->getSessionFromInfo()
#1 /var/www/html/includes/WebRequest.php(843): MediaWiki\Session\SessionManager->getSessionForRequest()
#2 /var/www/html/includes/user/User.php(1115): WebRequest->getSession()
#3 /var/www/html/includes/user/User.php(438): User->loadFromSession()
#4 /var/www/html/includes/user/User.php(1658): User->load()
#5 /var/www/html/includes/user/User.php(2310): User->getId()
#6 /var/www/html/includes/user/UserOptionsManager.php(645): User->isRegistered()
#7 /var/www/html/includes/user/UserOptionsManager.php(497): MediaWiki\User\UserOptionsManager->getCacheKey()
#8 /var/www/html/includes/user/UserOptionsManager.php(148): MediaWiki\User\UserOptionsManager->loadUserOptions()
#9 /var/www/html/extensions/DisplayTitle/includes/DisplayTitleHooks.php(155): MediaWiki\User\UserOptionsManager->getOption()
#10 /var/www/html/includes/HookContainer/HookContainer.php(160): MediaWiki\Extension\DisplayTitle\DisplayTitleHooks->onHtmlPageLinkRendererBegin()
#11 /var/www/html/includes/HookContainer/HookRunner.php(2025): MediaWiki\HookContainer\HookContainer->run()
#12 /var/www/html/includes/linker/LinkRenderer.php(168): MediaWiki\HookContainer\HookRunner->onHtmlPageLinkRendererBegin()
#13 /var/www/html/includes/linker/LinkRenderer.php(191): MediaWiki\Linker\LinkRenderer->runBeginHook()
#14 /var/www/html/includes/linker/LinkRenderer.php(242): MediaWiki\Linker\LinkRenderer->makePreloadedLink()
#15 /var/www/html/includes/linker/LinkRenderer.php(158): MediaWiki\Linker\LinkRenderer->makeKnownLink()
#16 /var/www/html/includes/parser/LinkHolderArray.php(313): MediaWiki\Linker\LinkRenderer->makeLink()
#17 /var/www/html/includes/parser/LinkHolderArray.php(159): LinkHolderArray->replaceInterwiki()
#18 /var/www/html/includes/parser/Parser.php(5085): LinkHolderArray->replace()
#19 /var/www/html/includes/parser/Parser.php(1713): Parser->replaceLinkHoldersPrivate()
#20 /var/www/html/includes/parser/Parser.php(727): Parser->internalParseHalfParsed()
#21 /var/www/html/includes/language/MessageCache.php(1374): Parser->parse()
#22 /var/www/html/includes/language/Message.php(1427): MessageCache->parse()
#23 /var/www/html/includes/language/Message.php(1004): Message->parseText()
#24 /var/www/html/includes/language/Message.php(1042): Message->format()
#25 /var/www/html/extensions/VisualEditor/includes/VisualEditorDataModule.php(32): Message->parse()
#26 /var/www/html/includes/ResourceLoader/Module.php(817): MediaWiki\Extension\VisualEditor\VisualEditorDataModule->getScript()
#27 /var/www/html/includes/ResourceLoader/Module.php(786): MediaWiki\ResourceLoader\Module->buildContent()
#28 /var/www/html/includes/ResourceLoader/Module.php(925): MediaWiki\ResourceLoader\Module->getModuleContent()
#29 /var/www/html/includes/ResourceLoader/StartUpModule.php(224): MediaWiki\ResourceLoader\Module->getVersionHash()
#30 /var/www/html/includes/ResourceLoader/StartUpModule.php(425): MediaWiki\ResourceLoader\StartUpModule->getModuleRegistrations()
#31 /var/www/html/includes/ResourceLoader/Module.php(817): MediaWiki\ResourceLoader\StartUpModule->getScript()
#32 /var/www/html/includes/ResourceLoader/Module.php(786): MediaWiki\ResourceLoader\Module->buildContent()
#33 /var/www/html/includes/ResourceLoader/Module.php(925): MediaWiki\ResourceLoader\Module->getModuleContent()
#34 /var/www/html/includes/ResourceLoader/ResourceLoader.php(701): MediaWiki\ResourceLoader\Module->getVersionHash()
#35 [internal function]: MediaWiki\ResourceLoader\ResourceLoader->MediaWiki\ResourceLoader\{closure}()
#36 /var/www/html/includes/ResourceLoader/ResourceLoader.php(699): array_map()
#37 /var/www/html/includes/ResourceLoader/ResourceLoader.php(798): MediaWiki\ResourceLoader\ResourceLoader->getCombinedVersion()
#38 /var/www/html/load.php(53): MediaWiki\ResourceLoader\ResourceLoader->respond()
#39 /var/www/html/load.php(39): wfLoadMain()
#40 {main}Because Load.php sets MW_NO_SESSION, so user cannot be retrieved from session. It seems to me that session should not be required for user option when user is also provided, but that's some weird core code.
Problem is that message visualeditor-wikitext-warning is required by VE in js loaded by resourceloader, and that message contains link to [[{{MediaWiki:visualeditor-wikitext-warning-link}}|wikitext]] (in English localisation), which is then handled before injected into js by DisplayTitle, but without session nor user, so user options cannot be retrieved.
Problem seems to be introduced in add option to handle displaylinks.
What should have happened instead?:
Resourceloader should not be broken
Software version (skip for WMF-hosted wikis like Wikipedia):
DisplayTitle REL1_39, commit hash 429a67f8497c7c29d3387300df44f17a37dad75b
VisualEditor 0.1.2
MediaWiki 1.39.3
PHP 8.0.29 (apache2handler)
MariaDB 10.4.26-MariaDB-log
ICU 67.1
Pygments 2.11.2
Elasticsearch 6.8.21
Build image 2.0.0.5
Other information (browser name/version, screenshots, etc.):
Stack trace, see above