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Maniphest T202580

BadMethodCallException from line 3671 of /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php: Call to a member function getId() on a non-object (boolean)
Closed, ResolvedPublicPRODUCTION ERROR
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Description

Seen after rollout of wmf.18 to group1

Stack:

#0 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(3603): Parser::statelessFetchTemplate(Title, Parser)
#1 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(3537): Parser->fetchTemplateAndTitle(Title)
#2 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(3297): Parser->getTemplateDom(Title)
#3 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Preprocessor_Hash.php(1114): Parser->braceSubstitution(array, PPFrame_Hash)
#4 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(2999): PPFrame_Hash->expand(PPNode_Hash_Tree, integer)
#5 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(1345): Parser->replaceVariables(string)
#6 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(682): Parser->internalParse(string, boolean, boolean)
#7 /srv/mediawiki/php-1.32.0-wmf.18/extensions/ProofreadPage/includes/Parser/PagesTagParser.php(326): Parser->recursiveTagParse(string)
#8 /srv/mediawiki/php-1.32.0-wmf.18/extensions/ProofreadPage/ProofreadPage.body.php(125): ProofreadPage\Parser\PagesTagParser->render(NULL, array)
#9 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(3942): Closure$ProofreadPage::onParserFirstCallInit#2(NULL, array, Parser, PPFrame_Hash)
#10 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Preprocessor_Hash.php(1188): Parser->extensionSubstitution(array, PPFrame_Hash)
#11 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(2999): PPFrame_Hash->expand(PPNode_Hash_Tree, integer)
#12 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(1345): Parser->replaceVariables(string)
#13 /srv/mediawiki/php-1.32.0-wmf.18/includes/parser/Parser.php(474): Parser->internalParse(string)
#14 /srv/mediawiki/php-1.32.0-wmf.18/includes/content/WikitextContent.php(341): Parser->parse(string, Title, ParserOptions, boolean, boolean, integer)
#15 /srv/mediawiki/php-1.32.0-wmf.18/includes/content/AbstractContent.php(516): WikitextContent->fillParserOutput(Title, integer, ParserOptions, boolean, ParserOutput)
#16 /srv/mediawiki/php-1.32.0-wmf.18/extensions/FlaggedRevs/backend/FlaggedRevs.class.php(642): AbstractContent->getParserOutput(Title, integer, ParserOptions)
#17 /srv/mediawiki/php-1.32.0-wmf.18/extensions/FlaggedRevs/backend/FlaggedRevs.class.php(566): FlaggedRevs::parseStableRevision(FlaggedRevision, ParserOptions)
#18 /srv/mediawiki/php-1.32.0-wmf.18/includes/poolcounter/PoolCounterWorkViaCallback.php(69): Closure$FlaggedRevs::parseStableRevisionPooled()
#19 /srv/mediawiki/php-1.32.0-wmf.18/includes/poolcounter/PoolCounterWork.php(123): PoolCounterWorkViaCallback->doWork()
#20 /srv/mediawiki/php-1.32.0-wmf.18/extensions/FlaggedRevs/backend/FlaggedRevs.class.php(582): PoolCounterWork->execute()
#21 /srv/mediawiki/php-1.32.0-wmf.18/extensions/FlaggedRevs/frontend/FlaggablePageView.php(749): FlaggedRevs::parseStableRevisionPooled(FlaggedRevision, ParserOptions)
#22 /srv/mediawiki/php-1.32.0-wmf.18/extensions/FlaggedRevs/frontend/FlaggablePageView.php(391): FlaggablePageView->showStableVersion(FlaggedRevision, string, string)
#23 /srv/mediawiki/php-1.32.0-wmf.18/extensions/FlaggedRevs/frontend/FlaggedRevsUI.hooks.php(204): FlaggablePageView->setPageContent(boolean, boolean)
#24 /srv/mediawiki/php-1.32.0-wmf.18/includes/Hooks.php(174): FlaggedRevsUIHooks::onArticleViewHeader(Article, boolean, boolean)
#25 /srv/mediawiki/php-1.32.0-wmf.18/includes/Hooks.php(202): Hooks::callHook(string, array, array, NULL)
#26 /srv/mediawiki/php-1.32.0-wmf.18/includes/page/Article.php(524): Hooks::run(string, array)
#27 /srv/mediawiki/php-1.32.0-wmf.18/includes/actions/ViewAction.php(68): Article->view()
#28 /srv/mediawiki/php-1.32.0-wmf.18/includes/MediaWiki.php(501): ViewAction->show()
#29 /srv/mediawiki/php-1.32.0-wmf.18/includes/MediaWiki.php(294): MediaWiki->performAction(Article, Title)
#30 /srv/mediawiki/php-1.32.0-wmf.18/includes/MediaWiki.php(868): MediaWiki->performRequest()
#31 /srv/mediawiki/php-1.32.0-wmf.18/includes/MediaWiki.php(525): MediaWiki->main()
#32 /srv/mediawiki/php-1.32.0-wmf.18/index.php(42): MediaWiki->run()
#33 /srv/mediawiki/w/index.php(3): include(string)
#34 {main}

Details

Related Changes in Gerrit:
SubjectRepoBranchLines +/-
Fix incorrect return value in CurrentRevisionCallbackmediawiki/extensions/FlaggedRevswmf/1.32.0-wmf.18+4 -2
Revert "Replace old and busted hook with the new hotness of a callback"mediawiki/extensions/FlaggedRevswmf/1.32.0-wmf.18+43 -37
Fix incorrect return value in CurrentRevisionCallbackmediawiki/extensions/FlaggedRevsmaster+4 -2
Revert "Replace old and busted hook with the new hotness of a callback"mediawiki/extensions/FlaggedRevsmaster+43 -37
Customize query in gerrit

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Event Timeline

thcipriani created this task.Aug 22 2018, 8:07 PM
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptAug 22 2018, 8:07 PM
thcipriani triaged this task as High priority.Aug 22 2018, 8:13 PM

Setting as high priority. This message is very noisy in the error logs.

Legoktm added a project: FlaggedRevs.Aug 22 2018, 8:17 PM
Legoktm added subscribers: matmarex, Legoktm.

Probably caused by rEFLR413e11e2f106: Replace old and busted hook with the new hotness of a callback.

thcipriani raised the priority of this task from High to Unbreak Now!.Aug 22 2018, 8:27 PM
thcipriani added a parent task: T191064: 1.32.0-wmf.18 deployment blockers.

Rolledback 1.32.0-wmf.18 from group1 wikis. Added this task as a train blocker. Setting UBN! since I added as a blocker.

Restricted Application added subscribers: Liuxinyu970226, TerraCodes. · View Herald TranscriptAug 22 2018, 8:28 PM
Umherirrender subscribed.Aug 22 2018, 8:36 PM

I would agree, that it comes from that patch set.

line 3671 of Parser is $rev_id = $rev ? $rev->getId() : 0;, looks safe for use of falsy values.

A possible truthy value here can only returned from Parser::fetchCurrentRevisionOfTitle which callback is overridden in FlaggedRevs and returns true.
The old code with return true was inside a hook, but now it is not a hook and must return a Revision or null

Krinkle moved this task from Untriaged to Dec2019/1.35.wmf.10+ on the Wikimedia-production-error board.Aug 23 2018, 12:58 AM
gerritbot subscribed.Aug 23 2018, 3:29 PM

Change 454835 had a related patch set uploaded (by Thcipriani; owner: Thcipriani):
[mediawiki/extensions/FlaggedRevs@master] Revert "Replace old and busted hook with the new hotness of a callback"

https://gerrit.wikimedia.org/r/454835

gerritbot added a project: Patch-For-Review.Aug 23 2018, 3:29 PM
thcipriani added a comment.Aug 23 2018, 3:35 PM

I posted a revert of the patchset identified in this ticket. Is this the best route forward for this train, i.e., revert this patch in wmf.18?

gerritbot added a comment.Aug 23 2018, 3:41 PM

Change 454839 had a related patch set uploaded (by Thcipriani; owner: Thcipriani):
[mediawiki/extensions/FlaggedRevs@wmf/1.32.0-wmf.18] Revert "Replace old and busted hook with the new hotness of a callback"

https://gerrit.wikimedia.org/r/454839

gerritbot added a comment.Aug 23 2018, 3:42 PM

Change 454835 abandoned by Thcipriani:
Revert "Replace old and busted hook with the new hotness of a callback"

Reason:
For wmf.18 only. Moved to I392f042d6a1792d24ede7faf92596f13750e3e47

https://gerrit.wikimedia.org/r/454835

gerritbot added a comment.Aug 23 2018, 3:47 PM

Change 454844 had a related patch set uploaded (by Bartosz Dziewoński; owner: Bartosz Dziewoński):
[mediawiki/extensions/FlaggedRevs@master] Fix incorrect return value in CurrentRevisionCallback

https://gerrit.wikimedia.org/r/454844

matmarex added a comment.Aug 23 2018, 3:48 PM

I'm sorry, that's a trivial mistake from me. Instead of returning true (which meant "use the default behavior" in the hook), we should call the callback function implementing the default behavior and return its result. I didn't update this code when copy-pasting it.

matmarex added a comment.Aug 23 2018, 3:51 PM
In T202580#4527097, @thcipriani wrote:

I posted a revert of the patchset identified in this ticket. Is this the best route forward for this train, i.e., revert this patch in wmf.18?

That would be fine, or alternatively my patch above. I won't be available today to help you verify the fix in production, so please do whatever you're comfortable with.

thcipriani added a comment.Aug 23 2018, 5:23 PM
In T202580#4527177, @matmarex wrote:
In T202580#4527097, @thcipriani wrote:

I posted a revert of the patchset identified in this ticket. Is this the best route forward for this train, i.e., revert this patch in wmf.18?

That would be fine, or alternatively my patch above. I won't be available today to help you verify the fix in production, so please do whatever you're comfortable with.

If someone else can review that patch for master before the window in an hour or so I'll gladly backport that fix. If not I'll go ahead and revert. Thank you for the patch!

gerritbot added a comment.Aug 23 2018, 6:02 PM

Change 454844 merged by jenkins-bot:
[mediawiki/extensions/FlaggedRevs@master] Fix incorrect return value in CurrentRevisionCallback

https://gerrit.wikimedia.org/r/454844

gerritbot added a comment.Aug 23 2018, 6:12 PM

Change 454868 had a related patch set uploaded (by Thcipriani; owner: Bartosz Dziewoński):
[mediawiki/extensions/FlaggedRevs@wmf/1.32.0-wmf.18] Fix incorrect return value in CurrentRevisionCallback

https://gerrit.wikimedia.org/r/454868

gerritbot added a comment.Aug 23 2018, 6:12 PM

Change 454839 abandoned by Thcipriani:
Revert "Replace old and busted hook with the new hotness of a callback"

https://gerrit.wikimedia.org/r/454839

gerritbot added a comment.Aug 23 2018, 6:24 PM

Change 454868 merged by jenkins-bot:
[mediawiki/extensions/FlaggedRevs@wmf/1.32.0-wmf.18] Fix incorrect return value in CurrentRevisionCallback

https://gerrit.wikimedia.org/r/454868

Stashbot subscribed.Aug 23 2018, 6:28 PM

Mentioned in SAL (#wikimedia-operations) [2018-08-23T18:28:38Z] <thcipriani@deploy1001> Synchronized php-1.32.0-wmf.18/extensions/FlaggedRevs/backend/FlaggedRevs.class.php: [[gerrit:454868|Fix incorrect return value in CurrentRevisionCallback]] T202580 (duration: 00m 54s)

thcipriani closed this task as Resolved.Aug 23 2018, 6:45 PM
thcipriani assigned this task to matmarex.

Seems resolved after rolling wmf.18 to group1 once again.

Thank you for the quick work!

ReleaseTaggerBot added a project: MW-1.32-notes (WMF-deploy-2018-08-21 (1.32.0-wmf.18)).Aug 23 2018, 7:01 PM
Catrope mentioned this in T202659: prepareForParse() nor setReviewedVersions() called yet.Aug 23 2018, 9:11 PM
• Petar.petkovic removed a project: Patch-For-Review.Aug 24 2018, 7:45 AM
Liuxinyu970226 unsubscribed.Aug 28 2018, 1:38 PM
Krinkle moved this task from Dec2019/1.35.wmf.10+ to Resolved on the Wikimedia-production-error board.Nov 28 2018, 3:11 AM
• mmodell changed the subtype of this task from "Task" to "Production Error".Aug 28 2019, 11:08 PM
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