Stack trace:
```
at VeCeDocumentNode.ve.ce.BranchNode.setupSlugs https://m.mediawiki.org/w/load.php?lang=en&modules=ext.visualEditor.articleTarget%2Cbase%2Ccore%2Cdiffing%2Cicons%2Clanguage%2Cmediawiki%2CmobileArticleTarget%2Cmwalienextension%2Cmwcore%2Cmwextensions%2Cmwformatting%2Cmwgallery%2Cmwimage%2Cmwlanguage%2Cmwlink%2Cmwmeta%2Cmwsave%2Cmwsignature%2Cmwtransclusion%2Csanitize%2CsupportCheck%2Cwelcome%7Cext.visualEditor.core.mobile%2Cutils%7Cext.visualEditor.mwimage.core&skin=minerva&version=1o8nd:450:752
at VeCeDocumentNode.ve.ce.BranchNode.setupBlockSlugs https://m.mediawiki.org/w/load.php?lang=en&modules=ext.visualEditor.articleTarget%2Cbase%2Ccore%2Cdiffing%2Cicons%2Clanguage%2Cmediawiki%2CmobileArticleTarget%2Cmwalienextension%2Cmwcore%2Cmwextensions%2Cmwformatting%2Cmwgallery%2Cmwimage%2Cmwlanguage%2Cmwlink%2Cmwmeta%2Cmwsave%2Cmwsignature%2Cmwtransclusion%2Csanitize%2CsupportCheck%2Cwelcome%7Cext.visualEditor.core.mobile%2Cutils%7Cext.visualEditor.mwimage.core&skin=minerva&version=1o8nd:449:744
at VeCeDocumentNode.ve.ce.BranchNode.onSplice https://m.mediawiki.org/w/load.php?lang=en&modules=ext.visualEditor.articleTarget%2Cbase%2Ccore%2Cdiffing%2Cicons%2Clanguage%2Cmediawiki%2CmobileArticleTarget%2Cmwalienextension%2Cmwcore%2Cmwextensions%2Cmwformatting%2Cmwgallery%2Cmwimage%2Cmwlanguage%2Cmwlink%2Cmwmeta%2Cmwsave%2Cmwsignature%2Cmwtransclusion%2Csanitize%2CsupportCheck%2Cwelcome%7Cext.visualEditor.core.mobile%2Cutils%7Cext.visualEditor.mwimage.core&skin=minerva&version=1o8nd:449:604
at VeDmDocumentNode.OO.EventEmitter.emit https://m.mediawiki.org/w/load.php?lang=en&modules=ext.centralNotice.choiceData%2CgeoIP%2CstartUp%7Cext.centralauth.centralautologin%7Cext.eventLogging%2CnavigationTiming%2CwikimediaEvents%7Cext.translate.pagetranslation.uls%7Cext.uls.common%2Ci18n%2Clanguagenames%2Cmediawiki%2Cmessages%7Cjquery%2Coojs%2Coojs-router%2Csite%7Cjquery.client%2Ccookie%2Ci18n%2Cthrottle-debounce%2Culs%7Cjquery.uls.data%2Cgrid%7Cmediawiki.String%2CTitle%2CUri%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctemplate%2Cuser%2Cutil%2Cviewport%7Cmediawiki.action.view.redirect%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.startup%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmediawiki.ui.anchor%7Cmobile.init%2Cstartup%7Cmobile.messageBox.styles%7Cmobile.ooui.icons%7Cmobile.pagelist.styles%7Cmobile.pagesummary.styles%7Cmobile.placeholder.images%7Cmobile.startup.images%7Cskins.minerva.icons.images.scripts%7Cskins.minerva.icons.images.scripts.misc%7Cskins.minerva.icons.page.issues.default.color%7Cskins.minerva.icons.page.issues.medium.color%7Cskins.minerva.icons.page.issues.uncolored%7Cskins.minerva.options%2Cscripts%7Cuser.defaults&skin=minerva&version=gqo46:227:483
at VeDmDocumentNode.ve.dm.BranchNode.splice https://m.mediawiki.org/w/load.php?lang=en&modules=ext.visualEditor.articleTarget%2Cbase%2Ccore%2Cdiffing%2Cicons%2Clanguage%2Cmediawiki%2CmobileArticleTarget%2Cmwalienextension%2Cmwcore%2Cmwextensions%2Cmwformatting%2Cmwgallery%2Cmwimage%2Cmwlanguage%2Cmwlink%2Cmwmeta%2Cmwsave%2Cmwsignature%2Cmwtransclusion%2Csanitize%2CsupportCheck%2Cwelcome%7Cext.visualEditor.core.mobile%2Cutils%7Cext.visualEditor.mwimage.core&skin=minerva&version=1o8nd:138:34
at splice https://m.mediawiki.org/w/load.php?lang=en&modules=ext.visualEditor.articleTarget%2Cbase%2Ccore%2Cdiffing%2Cicons%2Clanguage%2Cmediawiki%2CmobileArticleTarget%2Cmwalienextension%2Cmwcore%2Cmwextensions%2Cmwformatting%2Cmwgallery%2Cmwimage%2Cmwlanguage%2Cmwlink%2Cmwmeta%2Cmwsave%2Cmwsignature%2Cmwtransclusion%2Csanitize%2CsupportCheck%2Cwelcome%7Cext.visualEditor.core.mobile%2Cutils%7Cext.visualEditor.mwimage.core&skin=minerva&version=1o8nd:204:827
at Object.ve.dm.TreeModifier.static.applyTreeOperation https://m.mediawiki.org/w/load.php?lang=en&modules=ext.visualEditor.articleTarget%2Cbase%2Ccore%2Cdiffing%2Cicons%2Clanguage%2Cmediawiki%2CmobileArticleTarget%2Cmwalienextension%2Cmwcore%2Cmwextensions%2Cmwformatting%2Cmwgallery%2Cmwimage%2Cmwlanguage%2Cmwlink%2Cmwmeta%2Cmwsave%2Cmwsignature%2Cmwtransclusion%2Csanitize%2CsupportCheck%2Cwelcome%7Cext.visualEditor.core.mobile%2Cutils%7Cext.visualEditor.mwimage.core&skin=minerva&version=1o8nd:208:469
at Object.ve.dm.TreeModifier.static.applyTreeOperations https://m.mediawiki.org/w/load.php?lang=en&modules=ext.visualEditor.articleTarget%2Cbase%2Ccore%2Cdiffing%2Cicons%2Clanguage%2Cmediawiki%2CmobileArticleTarget%2Cmwalienextension%2Cmwcore%2Cmwextensions%2Cmwformatting%2Cmwgallery%2Cmwimage%2Cmwlanguage%2Cmwlink%2Cmwmeta%2Cmwsave%2Cmwsignature%2Cmwtransclusion%2Csanitize%2CsupportCheck%2Cwelcome%7Cext.visualEditor.core.mobile%2Cutils%7Cext.visualEditor.mwimage.core&skin=minerva&version=1o8nd:204:86
at VeDmTreeModifier.ve.dm.TreeModifier.process https://m.mediawiki.org/w/load.php?lang=en&modules=ext.visualEditor.articleTarget%2Cbase%2Ccore%2Cdiffing%2Cicons%2Clanguage%2Cmediawiki%2CmobileArticleTarget%2Cmwalienextension%2Cmwcore%2Cmwextensions%2Cmwformatting%2Cmwgallery%2Cmwimage%2Cmwlanguage%2Cmwlink%2Cmwmeta%2Cmwsave%2Cmwsignature%2Cmwtransclusion%2Csanitize%2CsupportCheck%2Cwelcome%7Cext.visualEditor.core.mobile%2Cutils%7Cext.visualEditor.mwimage.core&skin=minerva&version=1o8nd:210:62
at VeDmTransactionProcessor.ve.dm.TransactionProcessor.process https://m.mediawiki.org/w/load.php?lang=en&modules=ext.visualEditor.articleTarget%2Cbase%2Ccore%2Cdiffing%2Cicons%2Clanguage%2Cmediawiki%2CmobileArticleTarget%2Cmwalienextension%2Cmwcore%2Cmwextensions%2Cmwformatting%2Cmwgallery%2Cmwimage%2Cmwlanguage%2Cmwlink%2Cmwmeta%2Cmwsave%2Cmwsignature%2Cmwtransclusion%2Csanitize%2CsupportCheck%2Cwelcome%7Cext.visualEditor.core.mobile%2Cutils%7Cext.visualEditor.mwimage.core&skin=minerva&version=1o8nd:155:909
```
Link: https://logstash.wikimedia.org/goto/a3d8983ee04cb4210bfc57d2c8eaa354