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Maniphest T337807

Can't undelete or view very old deleted revisions of talk pages on MediaWiki.org because of content model problems
Open, LowPublicPRODUCTION ERROR
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Description

Steps to replicate the issue (include links if applicable):

(I've run into this error viewing deleted revisions of various pages several times, out of curiosity more than anything else. I was trying to undelete that talk page because the base page was undeleted way back in 2012, so the reason for deleting the talk page no longer holds).

What happens?:

All deleted revisions show up as an empty Flow board. Undeleting fails with

[5e5dd737-d355-4eac-800d-0ced854d8935] 2023-05-31 02:58:08: Fatal exception of type "Flow\Exception\FlowException"

What should have happened instead?:

The original deleted content can be correctly viewed and restored.

Related Objects

Event Timeline

Pppery created this task.May 31 2023, 3:00 AM
Restricted Application added a project: Growth-Team. · View Herald TranscriptMay 31 2023, 3:00 AM
Restricted Application added a subscriber: Aklapper. · View Herald Transcript
Pppery updated the task description. (Show Details)May 31 2023, 3:00 AM
kostajh moved this task from Inbox to Triaged on the Growth-Team board.Jun 1 2023, 8:57 AM
Krinkle moved this task from Untriaged to May 2023 on the Wikimedia-production-error board.Aug 24 2023, 5:44 PM
Pppery mentioned this in T382021: Fix page handled by Structured Discussions, while the Title class indicates that the content model is 'wikitext'.Dec 11 2024, 6:09 PM
Krinkle removed a project: Wikimedia-production-error.EditedApr 1 2025, 1:36 AM
Krinkle subscribed.

This is not a production error. Untagging as such.

I have reproduced the bug, and it indeed still causing information to be unavailable. Despite being wikitext talk pages, Flow's presence is preventing these from being accessed.

Pppery added a project: Wikimedia-production-error.EditedApr 1 2025, 1:57 AM

@Krinkle This looks very much like a production error to me - I tried the undelete again, and got an error:

[f921f5ad-cf7b-4cc1-bd99-794e9efa9757] 2025-04-01 01:56:29: Fatal exception of type "Flow\Exception\FlowException"

This ticket is reporting two related bugs: one is a logic error on viewdeleted (and not a production error), the other is a production error on undelete.

Restricted Application changed the subtype of this task from "Bug Report" to "Production Error". · View Herald TranscriptApr 1 2025, 1:57 AM
Bugreporter mentioned this in T391206: Propose to add "stack trace requested" column to #wikimedia-production-error.Apr 6 2025, 8:09 PM
Maintenance_bot added a project: MW-Interfaces-Team.Apr 6 2025, 8:30 PM
HCoplin-WMF moved this task from Incoming (Needs Triage) to Bugs & Chores on the MW-Interfaces-Team board.Apr 7 2025, 5:52 PM
Urbanecm_WMF removed a project: Growth-Team.Oct 28 2025, 12:27 AM
aaron triaged this task as High priority.Fri, Nov 7, 7:05 AM
HCoplin-WMF lowered the priority of this task from High to Low.Wed, Dec 3, 2:29 PM
HCoplin-WMF removed a project: MW-Interfaces-Team.
HCoplin-WMF subscribed.

Updating priority to low. Flow is a deprecated/unsupported extension, on the path for removal: https://phabricator.wikimedia.org/T332022

Also removing MWI, as we do not own flow. Feel free to retag us if there is any evidence of this being a wider deletion/undeletion issue :)

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