```name=Message,counterexample
class@anonymous
```
```name=exception
Cache key contains characters that are not allowed: `P180_1101514477_fr?uselang=fr_label`
Cache key contains characters that are not allowed: `P31_1111607050_⧼lang⧽_label`
from /srv/mediawiki/php-1.35.0-wmf.19/extensions/Wikibase/lib/includes/SimpleCacheWithBagOStuff.php:271
```
```lines=12,name=exception.trace
#0 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Wikibase/lib/includes/SimpleCacheWithBagOStuff.php(266): Wikibase\Lib\SimpleCacheWithBagOStuff->invalidArgument(string)
#1 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Wikibase/lib/includes/SimpleCacheWithBagOStuff.php(233): Wikibase\Lib\SimpleCacheWithBagOStuff->assertKeyIsValid(string)
#2 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Wikibase/lib/includes/Store/UncachedTermsPrefetcher.php(76): Wikibase\Lib\SimpleCacheWithBagOStuff->has(string)
#3 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Wikibase/lib/includes/Store/UncachedTermsPrefetcher.php(41): Wikibase\Lib\Store\UncachedTermsPrefetcher->getUncachedLanguagesForEntityTerms(Wikibase\Lib\SimpleCacheWithBagOStuff, Wikibase\DataModel\Entity\PropertyId, array, array)
#4 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Wikibase/lib/includes/Store/CachingPrefetchingTermLookup.php(42): Wikibase\Lib\Store\UncachedTermsPrefetcher->prefetchUncached(Wikibase\Lib\SimpleCacheWithBagOStuff, array, array, array)
#5 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Wikibase/data-access/src/ByTypeDispatchingPrefetchingTermLookup.php(52): Wikibase\Lib\Store\CachingPrefetchingTermLookup->prefetchTerms(array, array, array)
#6 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Wikibase/data-access/src/ByTypeDispatchingPrefetchingTermLookup.php(52): Wikibase\DataAccess\ByTypeDispatchingPrefetchingTermLookup->prefetchTerms(array, array, array)
#7 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Wikibase/data-access/src/ByTypeDispatchingPrefetchingTermLookup.php(88): Wikibase\DataAccess\ByTypeDispatchingPrefetchingTermLookup->prefetchTerms(array, array, array)
#8 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Wikibase/lib/includes/Store/EntityTermLookupBase.php(52): Wikibase\DataAccess\ByTypeDispatchingPrefetchingTermLookup->getTermsOfType(Wikibase\DataModel\Entity\PropertyId, string, array)
#9 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Wikibase/lib/includes/Store/LanguageFallbackLabelDescriptionLookup.php(51): Wikibase\Lib\Store\EntityTermLookupBase->getLabels(Wikibase\DataModel\Entity\PropertyId, array)
#10 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Wikibase/client/includes/Usage/UsageTrackingLanguageFallbackLabelDescriptionLookup.php(72): Wikibase\Lib\Store\LanguageFallbackLabelDescriptionLookup->getLabel(Wikibase\DataModel\Entity\PropertyId)
#11 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Wikibase/client/includes/DataAccess/Scribunto/WikibaseLanguageDependentLuaBindings.php(60): Wikibase\Client\Usage\UsageTrackingLanguageFallbackLabelDescriptionLookup->getLabel(Wikibase\DataModel\Entity\PropertyId)
#12 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Wikibase/client/includes/DataAccess/Scribunto/Scribunto_LuaWikibaseLibrary.php(595): Wikibase\Client\DataAccess\Scribunto\WikibaseLanguageDependentLuaBindings->getLabel(string)
#13 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Scribunto/includes/engines/LuaSandbox/LuaSandboxCallback.php(26): Wikibase\Client\DataAccess\Scribunto\Scribunto_LuaWikibaseLibrary->getLabel(string)
#14 [internal function]: Scribunto_LuaSandboxCallback->__call(string, array)
#15 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Scribunto/includes/engines/LuaSandbox/LuaSandboxInterpreter.php(113): LuaSandboxFunction->call(LuaSandboxFunction)
#16 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Scribunto/includes/engines/LuaCommon/LuaEngine.php(291): Scribunto_LuaSandboxInterpreter->callFunction(LuaSandboxFunction, LuaSandboxFunction)
#17 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Scribunto/includes/engines/LuaCommon/LuaModule.php(69): Scribunto_LuaEngine->executeFunctionChunk(LuaSandboxFunction, PPTemplateFrame_Hash)
#18 /srv/mediawiki/php-1.35.0-wmf.19/extensions/Scribunto/includes/common/Hooks.php(128): Scribunto_LuaModule->invoke(string, PPTemplateFrame_Hash)
#19 /srv/mediawiki/php-1.35.0-wmf.19/includes/parser/Parser.php(3599): ScribuntoHooks::invokeHook(Parser, PPTemplateFrame_Hash, array)
#20 /srv/mediawiki/php-1.35.0-wmf.19/includes/parser/Parser.php(3303): Parser->callParserFunction(PPTemplateFrame_Hash, string, array)
#21 /srv/mediawiki/php-1.35.0-wmf.19/includes/parser/PPFrame_Hash.php(253): Parser->braceSubstitution(array, PPTemplateFrame_Hash)
#22 /srv/mediawiki/php-1.35.0-wmf.19/extensions/ParserFunctions/includes/ParserFunctions.php(123): PPFrame_Hash->expand(PPNode_Hash_Tree)
#23 /srv/mediawiki/php-1.35.0-wmf.19/includes/parser/Parser.php(3599): MediaWiki\Extensions\ParserFunctions\ParserFunctions::if(Parser, PPTemplateFrame_Hash, array)
#24 /srv/mediawiki/php-1.35.0-wmf.19/includes/parser/Parser.php(3303): Parser->callParserFunction(PPTemplateFrame_Hash, string, array)
#25 /srv/mediawiki/php-1.35.0-wmf.19/includes/parser/PPFrame_Hash.php(253): Parser->braceSubstitution(array, PPTemplateFrame_Hash)
#26 /srv/mediawiki/php-1.35.0-wmf.19/includes/parser/Parser.php(3481): PPFrame_Hash->expand(PPNode_Hash_Tree)
#27 /srv/mediawiki/php-1.35.0-wmf.19/includes/parser/PPFrame_Hash.php(253): Parser->braceSubstitution(array, PPTemplateFrame_Hash)
#28 /srv/mediawiki/php-1.35.0-wmf.19/includes/parser/PPTemplateFrame_Hash.php(89): PPFrame_Hash->expand(PPNode_Hash_Tree, integer)
#29 /srv/mediawiki/php-1.35.0-wmf.19/includes/parser/Parser.php(3478): PPTemplateFrame_Hash->cachedExpand(string, PPNode_Hash_Tree)
#30 /srv/mediawiki/php-1.35.0-wmf.19/includes/parser/PPFrame_Hash.php(253): Parser->braceSubstitution(array, PPFrame_Hash)
#31 /srv/mediawiki/php-1.35.0-wmf.19/includes/parser/Parser.php(3144): PPFrame_Hash->expand(PPNode_Hash_Tree, integer)
#32 /srv/mediawiki/php-1.35.0-wmf.19/includes/parser/Parser.php(1482): Parser->replaceVariables(string)
#33 /srv/mediawiki/php-1.35.0-wmf.19/includes/parser/Parser.php(598): Parser->internalParse(string)
#34 /srv/mediawiki/php-1.35.0-wmf.19/includes/content/WikitextContent.php(368): Parser->parse(string, Title, ParserOptions, boolean, boolean, integer)
#35 /srv/mediawiki/php-1.35.0-wmf.19/includes/content/AbstractContent.php(565): WikitextContent->fillParserOutput(Title, integer, ParserOptions, boolean, ParserOutput)
#36 /srv/mediawiki/php-1.35.0-wmf.19/includes/Revision/RenderedRevision.php(267): AbstractContent->getParserOutput(Title, integer, ParserOptions, boolean)
#37 /srv/mediawiki/php-1.35.0-wmf.19/includes/Revision/RenderedRevision.php(236): MediaWiki\Revision\RenderedRevision->getSlotParserOutputUncached(WikitextContent, boolean)
#38 /srv/mediawiki/php-1.35.0-wmf.19/includes/Revision/RevisionRenderer.php(215): MediaWiki\Revision\RenderedRevision->getSlotParserOutput(string)
#39 /srv/mediawiki/php-1.35.0-wmf.19/includes/Revision/RevisionRenderer.php(152): MediaWiki\Revision\RevisionRenderer->combineSlotOutput(MediaWiki\Revision\RenderedRevision, array)
#40 [internal function]: MediaWiki\Revision\RevisionRenderer->MediaWiki\Revision\{closure}(MediaWiki\Revision\RenderedRevision, array)
#41 /srv/mediawiki/php-1.35.0-wmf.19/includes/Revision/RenderedRevision.php(198): call_user_func(Closure, MediaWiki\Revision\RenderedRevision, array)
#42 /srv/mediawiki/php-1.35.0-wmf.19/includes/poolcounter/PoolWorkArticleView.php(196): MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#43 /srv/mediawiki/php-1.35.0-wmf.19/includes/poolcounter/PoolCounterWork.php(125): PoolWorkArticleView->doWork()
#44 /srv/mediawiki/php-1.35.0-wmf.19/includes/page/Article.php(803): PoolCounterWork->execute()
#45 /srv/mediawiki/php-1.35.0-wmf.19/includes/page/CategoryPage.php(66): Article->view()
#46 /srv/mediawiki/php-1.35.0-wmf.19/includes/actions/ViewAction.php(63): CategoryPage->view()
#47 /srv/mediawiki/php-1.35.0-wmf.19/includes/MediaWiki.php(518): ViewAction->show()
#48 /srv/mediawiki/php-1.35.0-wmf.19/includes/MediaWiki.php(304): MediaWiki->performAction(CategoryTreeCategoryPage, Title)
#49 /srv/mediawiki/php-1.35.0-wmf.19/includes/MediaWiki.php(971): MediaWiki->performRequest()
#50 /srv/mediawiki/php-1.35.0-wmf.19/includes/MediaWiki.php(534): MediaWiki->main()
#51 /srv/mediawiki/php-1.35.0-wmf.19/index.php(47): MediaWiki->run()
#52 /srv/mediawiki/w/index.php(3): require(string)
#53 {main}
```
##### Impact
About 50 per minute. 400 today.
##### Notes
Started 2012-02-12 with wmf.19 rolling out.
{F31614686}