##### Error
Request ID: `XUG40gpAMFQAAKDkvqIAAABW`
Request URL: https://incubator.wikimedia.org/wiki//incubator.m.wikimedia.org
```name=message
/wiki//incubator.m.wikimedia.org Wikimedia\Assert\PostconditionException from line 140 of /srv/mediawiki/php-1.34.0-wmf.15/vendor/wikimedia/assert/src/Assert.php: Postcondition failed: makeTitleSafe() should always return a Title for the text returned by getBaseText().
```
```name=trace,lines=10
#0 /srv/mediawiki/php-1.34.0-wmf.15/includes/Title.php(1852): Wikimedia\Assert\Assert::postcondition(boolean, string)
#1 /srv/mediawiki/php-1.34.0-wmf.15/extensions/GeoCrumbs/includes/GeoCrumbsHooks.php(65): Title->getBaseTitle()
#2 /srv/mediawiki/php-1.34.0-wmf.15/extensions/GeoCrumbs/includes/GeoCrumbsHooks.php(45): GeoCrumbsHooks::completeImplicitIsIn(ParserOutput, Title)
#3 /srv/mediawiki/php-1.34.0-wmf.15/includes/Hooks.php(174): GeoCrumbsHooks::onParserBeforeTidy(Parser, string)
#4 /srv/mediawiki/php-1.34.0-wmf.15/includes/Hooks.php(202): Hooks::callHook(string, array, array, NULL)
#5 /srv/mediawiki/php-1.34.0-wmf.15/includes/parser/Parser.php(1509): Hooks::run(string, array)
#6 /srv/mediawiki/php-1.34.0-wmf.15/includes/parser/Parser.php(558): Parser->internalParseHalfParsed(string, boolean, boolean)
#7 /srv/mediawiki/php-1.34.0-wmf.15/includes/cache/MessageCache.php(1260): Parser->parse(string, Title, ParserOptions, boolean)
#8 /srv/mediawiki/php-1.34.0-wmf.15/includes/language/Message.php(1265): MessageCache->parse(string, Title, boolean, boolean, LanguageEn)
#9 /srv/mediawiki/php-1.34.0-wmf.15/includes/language/Message.php(895): Message->parseText(string)
#10 /srv/mediawiki/php-1.34.0-wmf.15/includes/language/Message.php(981): Message->toString(string)
#11 /srv/mediawiki/php-1.34.0-wmf.15/includes/OutputPage.php(3960): Message->parseAsBlock()
#12 /srv/mediawiki/php-1.34.0-wmf.15/includes/OutputPage.php(3948): OutputPage->addWikiMsgArray(string, array)
#13 /srv/mediawiki/php-1.34.0-wmf.15/extensions/WikimediaIncubator/includes/WikimediaIncubator.php(624): OutputPage->addWikiMsg(string)
#14 /srv/mediawiki/php-1.34.0-wmf.15/includes/Hooks.php(174): WikimediaIncubator::onShowMissingArticle(Article)
#15 /srv/mediawiki/php-1.34.0-wmf.15/includes/Hooks.php(202): Hooks::callHook(string, array, array, NULL)
#16 /srv/mediawiki/php-1.34.0-wmf.15/includes/page/Article.php(1400): Hooks::run(string, array)
#17 /srv/mediawiki/php-1.34.0-wmf.15/includes/page/Article.php(684): Article->showMissingArticle()
#18 /srv/mediawiki/php-1.34.0-wmf.15/includes/actions/ViewAction.php(63): Article->view()
#19 /srv/mediawiki/php-1.34.0-wmf.15/includes/MediaWiki.php(507): ViewAction->show()
#20 /srv/mediawiki/php-1.34.0-wmf.15/includes/MediaWiki.php(302): MediaWiki->performAction(Article, Title)
#21 /srv/mediawiki/php-1.34.0-wmf.15/includes/MediaWiki.php(892): MediaWiki->performRequest()
#22 /srv/mediawiki/php-1.34.0-wmf.15/includes/MediaWiki.php(523): MediaWiki->main()
#23 /srv/mediawiki/php-1.34.0-wmf.15/index.php(42): MediaWiki->run()
#24 /srv/mediawiki/w/index.php(3): include(string)
#25 {main}
```
##### Notes
Shows up in logstash ~29 times starting on 2019-07-24.