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TypeError: null is not an object (evaluating 've.init.target.tryTeardown') / TypeError: Cannot read property 'tryTeardown' of null at VeUiMWBackCommand.ve.ui.MWBackCommand.execute
Open, Needs TriagePublicPRODUCTION ERROR

Description

Error

MediaWiki version: n/a

message
TypeError: null is not an object (evaluating 've.init.target.tryTeardown')
https://logstash.wikimedia.org/app/dashboards#/doc/logstash-*/logstash-2021.04.05?id=pQjEongBWKe2MTdR5cG5

Impact

Notes

Details

Request URL
n/a
Stack Trace
exception.trace
at VeUiMWBackCommand.ve.ui.MWBackCommand.execute  URL1:1045:392
at URL1:686:70
at fire  URL2:99:198
at Object.add [as done]  URL2:99:696
at VeUiMwBackTool.ve.ui.Tool.onSelect  URL1:686:42
at OoUiBarToolGroup.OO.ui.ToolGroup.onMouseKeyUp  URL3:245:499
at OoUiBarToolGroup.OO.ui.ToolGroup.onDocumentMouseKeyUp  URL3:245:234

URL1: https://en.m.wikipedia.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=1qqpk
URL2: https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2ClargeBannerLimit%2ClegacySupport%7Cext.eventLogging%2CnavigationTiming%2CwikimediaEvents%7Cjquery%2Csite%7Cmediawiki.base%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.misc%7Cskins.minerva.icons.page.issues.default.color%7Cskins.minerva.icons.page.issues.medium.color%7Cskins.minerva.icons.page.issues.uncolored%7Cskins.minerva.scripts&skin=minerva&version=cmzsk
URL3: https://en.m.wikipedia.org/w/load.php?lang=en&modules=mediawiki.confirmCloseWindow%2Cnotification%2CvisibleTimeout%7Cmediawiki.editfont.styles%7Cmediawiki.ui.input%7Cmediawiki.widgets.AbandonEditDialog%7Cmobile.editor.images%2Coverlay%7Cmobile.user.icons%7Coojs-ui%2Coojs-ui-core%2Coojs-ui-toolbars%2Coojs-ui-widgets%2Coojs-ui-windows%7Coojs-ui-core.icons%2Cstyles%7Coojs-ui-toolbars.icons%7Coojs-ui-widgets.icons%7Coojs-ui-windows.icons%7Coojs-ui.styles.icons-editing-core%2Cindicators&skin=minerva&version=15l8n
exception.trace
at URL1:1045:391
at URL1:686:77
at fire URL2:46:214
at add URL2:46:714
at URL1:686:46
at URL3:235:507
at URL3:235:246

URL1: https://ja.m.wikipedia.org/w/load.php?lang=ja&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=1eei6
URL2: https://ja.m.wikipedia.org/w/load.php?lang=ja&modules=jquery&skin=minerva&version=tqh7e
URL3: https://ja.m.wikipedia.org/w/load.php?lang=ja&modules=mediawiki.ui.input%7Cmobile.editor.images%2Coverlay%7Cmobile.user.icons%7Coojs-ui-core%2Coojs-ui-toolbars%2Coojs-ui-widgets%2Coojs-ui-windows%7Coojs-ui-core.icons%2Cstyles%7Coojs-ui-toolbars.icons%7Coojs-ui-windows.icons%7Coojs-ui.styles.icons-editing-core%2Cindicators&skin=minerva&version=xksml

Event Timeline

There are still errors in the last 24hrs but I am not sure if 675582 was deployed so maybe that's expected.

Change 700620 had a related patch set uploaded (by Bartosz Dziewoński; author: Bartosz Dziewoński):

[mediawiki/extensions/VisualEditor@master] ve.ui.MWBackTool: Avoid using global ve.init.target

https://gerrit.wikimedia.org/r/700620