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Maniphest T106195

MediaWiki gives error, when press undo after a contentmodelchange
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Description

MediaWiki fails when press the revert button after a contentmodelchange. I will upload two screenshots to show the error message

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Luke081515 created this task.Jul 17 2015, 10:31 PM
Luke081515 raised the priority of this task from to Needs Triage.
Luke081515 updated the task description. (Show Details)
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Restricted Application added a subscriber: Aklapper. · View Herald TranscriptJul 17 2015, 10:31 PM
Krenair added a project: MediaWiki-ContentHandler.Jul 17 2015, 10:31 PM
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Luke081515 added a mock: M67: contentmodelchange: bug after a change.EditedJul 17 2015, 10:33 PM

M67 shows you the error message, and what do you have to do, to get this bug.

Reedy set Security to None.Jul 17 2015, 10:35 PM
Reedy added subscribers: Legoktm, daniel.
MGChecker subscribed.Jul 17 2015, 10:35 PM
Luke081515 added a comment.Jul 17 2015, 10:38 PM

For this bug is CSS as new contentmodel not required, it works also with the others: http://deployment.wikimedia.beta.wmflabs.org/w/index.php?title=User:Luke081515/ContentBugII&action=edit&undoafter=2753&undo=2754

• Quiddity triaged this task as High priority.Mar 10 2016, 8:23 PM
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I get [620c99a9] 2016-03-10 20:21:56: Fatal exception of type MWException after clicking undo at https://www.mediawiki.org/w/index.php?title=User:Quiddity_%28WMF%29/sandbox3&action=history

Bawolff renamed this task from MediaWiki gives error, when press revert after a contentmodelchange to MediaWiki gives error, when press undo after a contentmodelchange.Sep 9 2016, 4:17 AM
Bawolff subscribed.

Your screenshot shows you clicking undo (There are other links labelled revert, so I was confused initially).

That said, we're fixing issue, this is a dupe of T145044

Bawolff closed this task as a duplicate of T145044: Clicking undo on an edit that changed the content model results in a MWException.Sep 9 2016, 4:19 AM
• MZMcBride mentioned this in T72901: Users can change the content model of other users' user pages to CSS or JS.Sep 10 2016, 8:47 PM
• MZMcBride subscribed.Sep 11 2016, 1:30 AM
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