Wikimedia Bugzilla is closed!

Not a high priority since this is only relevant to requests that are invalid and are never formed by MediaWiki itself, but an ugly way to handle the error.

When accessing index.php with an invalid uselang, it gets sanitised to 'en' by Wiki.php -> RequestContext.php#sanitizeLangCode.

On the load.php path, it results in an MWException from Language::newFromCode

exception 'MWException' with message 'Invalid language code "x:' in mediawiki/languages/Language.php:217
Stack trace:
#0 mediawiki/languages/Language.php(196): Language::newFromCode('x:')
#1 mediawiki/includes/resourceloader/ResourceLoaderContext.php(162): Language::factory('x:')
#2 mediawiki/includes/resourceloader/ResourceLoaderContext.php(237): ResourceLoaderContext->getDirection()
#3 mediawiki/includes/resourceloader/ResourceLoaderWikiModule.php(224): ResourceLoaderContext->getHash()
#4 mediawiki/includes/resourceloader/ResourceLoaderWikiModule.php(179): ResourceLoaderWikiModule->getTitleMtimes(Object(ResourceLoaderContext))
#5 mediawiki/includes/resourceloader/ResourceLoader.php(514): ResourceLoaderWikiModule->getModifiedTime(Object(ResourceLoaderContext))
#6 mediawiki/load.php(43): ResourceLoader->respond(Object(ResourceLoaderContext))
#7 {main}



ResourceLoader::makeModuleResponse: generating module package failed: exception 'MWException' with message 'Invalid language code "x:"' in /usr/local/apache/common-local/php-1.23wmf17/languages/Language.php:217
Stack trace:
#0 /usr/local/apache/common-local/php-1.23wmf17/languages/Language.php(196): Language::newFromCode('x:')
#1 /usr/local/apache/common-local/php-1.23wmf17/includes/resourceloader/ResourceLoaderContext.php(162): Language::factory('x:')
#2 /usr/local/apache/common-local/php-1.23wmf17/includes/resourceloader/ResourceLoaderModule.php(118): ResourceLoaderContext->getDirection()
#3 /usr/local/apache/common-local/php-1.23wmf17/includes/resourceloader/ResourceLoaderWikiModule.php(158): ResourceLoaderModule->getFlip(Object(ResourceLoaderContext))
#4 /usr/local/apache/common-local/php-1.23wmf17/includes/resourceloader/ResourceLoader.php(778): ResourceLoaderWikiModule->getStyles(Object(ResourceLoaderContext))
#5 /usr/local/apache/common-local/php-1.23wmf17/includes/resourceloader/ResourceLoader.php(518): ResourceLoader->makeModuleResponse(Object(ResourceLoaderContext), Array, Array)
#6 /usr/local/apache/common-local/php-1.23wmf17/load.php(43): ResourceLoader->respond(Object(ResourceLoaderContext))
#7 /usr/local/apache/common-local/w/load.php(3): require('/usr/local/apac...')
#8 {main}