=== Error ===
* `MediaWiki version:` **`1.36.0-wmf.33`**
* reqId: `YEELCXG5uD@t-@kj6LSU@AAAAM0` ([Logstash](https://logstash.wikimedia.org/goto/6dbb0896dce0e335d9f4476ac1a7aea1)
```name=message
[{reqId}] {exception_url} MediaWiki\Revision\RevisionAccessException: No such slot: main
```
```name=exception.trace,lines=10
from /srv/mediawiki/php-1.36.0-wmf.33/includes/Revision/RevisionSlots.php(114)
#0 /srv/mediawiki/php-1.36.0-wmf.33/includes/Revision/RevisionRecord.php(181): MediaWiki\Revision\RevisionSlots->getSlot(string)
#1 /srv/mediawiki/php-1.36.0-wmf.33/includes/Revision/RevisionRecord.php(164): MediaWiki\Revision\RevisionRecord->getSlot(string, integer, NULL)
#2 /srv/mediawiki/php-1.36.0-wmf.33/includes/parser/Parser.php(3697): MediaWiki\Revision\RevisionRecord->getContent(string)
#3 /srv/mediawiki/php-1.36.0-wmf.33/includes/parser/Parser.php(3548): Parser->statelessFetchTemplate(Title, Parser)
#4 /srv/mediawiki/php-1.36.0-wmf.33/includes/parser/Parser.php(3416): Parser->fetchTemplateAndTitle(Title)
#5 /srv/mediawiki/php-1.36.0-wmf.33/includes/parser/Parser.php(3158): Parser->getTemplateDom(Title)
#6 /srv/mediawiki/php-1.36.0-wmf.33/includes/parser/PPFrame_Hash.php(263): Parser->braceSubstitution(array, PPFrame_Hash)
#7 /srv/mediawiki/php-1.36.0-wmf.33/includes/parser/Parser.php(2880): PPFrame_Hash->expand(PPNode_Hash_Tree, integer)
#8 /srv/mediawiki/php-1.36.0-wmf.33/includes/parser/Parser.php(4572): Parser->replaceVariables(string)
#9 /srv/mediawiki/php-1.36.0-wmf.33/includes/parser/Parser.php(4540): Parser->pstPass2(string, User)
#10 /srv/mediawiki/php-1.36.0-wmf.33/includes/content/WikitextContent.php(159): Parser->preSaveTransform(string, Title, User, ParserOptions)
#11 /srv/mediawiki/php-1.36.0-wmf.33/includes/Storage/DerivedPageDataUpdater.php(845): WikitextContent->preSaveTransform(Title, User, ParserOptions)
#12 /srv/mediawiki/php-1.36.0-wmf.33/includes/page/WikiPage.php(2206): MediaWiki\Storage\DerivedPageDataUpdater->prepareContent(User, MediaWiki\Storage\RevisionSlotsUpdate, boolean)
#13 /srv/mediawiki/php-1.36.0-wmf.33/extensions/SpamBlacklist/includes/SpamBlacklistHooks.php(34): WikiPage->prepareContentForEdit(WikitextContent)
#14 /srv/mediawiki/php-1.36.0-wmf.33/includes/HookContainer/HookContainer.php(333): SpamBlacklistHooks::filterMergedContent(DerivativeContext, WikitextContent, Status, string, User, boolean)
#15 /srv/mediawiki/php-1.36.0-wmf.33/includes/HookContainer/HookContainer.php(140): MediaWiki\HookContainer\HookContainer->callLegacyHook(string, array, array, array)
#16 /srv/mediawiki/php-1.36.0-wmf.33/includes/HookContainer/HookRunner.php(1566): MediaWiki\HookContainer\HookContainer->run(string, array)
#17 /srv/mediawiki/php-1.36.0-wmf.33/includes/editpage/Constraint/EditFilterMergedContentHookConstraint.php(90): MediaWiki\HookContainer\HookRunner->onEditFilterMergedContent(DerivativeContext, WikitextContent, Status, string, User, boolean)
#18 /srv/mediawiki/php-1.36.0-wmf.33/includes/editpage/Constraint/EditConstraintRunner.php(88): MediaWiki\EditPage\Constraint\EditFilterMergedContentHookConstraint->checkConstraint()
#19 /srv/mediawiki/php-1.36.0-wmf.33/includes/EditPage.php(2086): MediaWiki\EditPage\Constraint\EditConstraintRunner->checkConstraints()
#20 /srv/mediawiki/php-1.36.0-wmf.33/includes/EditPage.php(1687): EditPage->internalAttemptSave(NULL, boolean)
#21 /srv/mediawiki/php-1.36.0-wmf.33/includes/EditPage.php(662): EditPage->attemptSave(NULL)
#22 /srv/mediawiki/php-1.36.0-wmf.33/includes/actions/EditAction.php(71): EditPage->edit()
#23 /srv/mediawiki/php-1.36.0-wmf.33/includes/actions/SubmitAction.php(38): EditAction->show()
#24 /srv/mediawiki/php-1.36.0-wmf.33/includes/MediaWiki.php(531): SubmitAction->show()
#25 /srv/mediawiki/php-1.36.0-wmf.33/includes/MediaWiki.php(315): MediaWiki->performAction(Article, Title)
#26 /srv/mediawiki/php-1.36.0-wmf.33/includes/MediaWiki.php(925): MediaWiki->performRequest()
#27 /srv/mediawiki/php-1.36.0-wmf.33/includes/MediaWiki.php(547): MediaWiki->main()
#28 /srv/mediawiki/php-1.36.0-wmf.33/index.php(53): MediaWiki->run()
#29 /srv/mediawiki/php-1.36.0-wmf.33/index.php(46): wfIndexMain()
#30 /srv/mediawiki/w/index.php(3): require(string)
#31 {main}
```
=== Impact ===
There's about 20 of these in the last four hours. Not enough to warrant rolling back the train, but it's logspam and would be good to fix.
=== Notes ===