List of steps to reproduce (step by step, including full links if applicable):
- Try and edit a page that uses templates (at least I think that's the requirement) with the visual editor
What happens?:
A popup reports a 500 error and it falls back to edit source. Hitting the underlying REST URL directly with exception reporting enabled results in:
rest.php/wiki.example.com/v3/page/html/New_features/26357?redirect=false&stash=true
Exception: Serialization of 'Wikimedia\Parsoid\DOM\Compat\Element' is not allowed
Backtrace:
from /srv/wiki.example.com/vendor/wikimedia/parsoid/src/Utils/Utils.php(87)
#0 /srv/wiki.example.com/vendor/wikimedia/parsoid/src/Utils/Utils.php(87): serialize()
#1 /srv/wiki.example.com/vendor/wikimedia/parsoid/src/Wt2Html/PP/Processors/WrapTemplates.php(916): Wikimedia\Parsoid\Utils\Utils::clone()
#2 /srv/wiki.example.com/vendor/wikimedia/parsoid/src/Wt2Html/PP/Processors/WrapTemplates.php(1236): Wikimedia\Parsoid\Wt2Html\PP\Processors\WrapTemplates::encapsulateTemplates()
#3 /srv/wiki.example.com/vendor/wikimedia/parsoid/src/Wt2Html/PP/Processors/WrapTemplates.php(1249): Wikimedia\Parsoid\Wt2Html\PP\Processors\WrapTemplates::wrapTemplatesInTree()
#4 /srv/wiki.example.com/vendor/wikimedia/parsoid/src/Wt2Html/DOMPostProcessor.php(159): Wikimedia\Parsoid\Wt2Html\PP\Processors\WrapTemplates->run()
#5 /srv/wiki.example.com/vendor/wikimedia/parsoid/src/Wt2Html/DOMPostProcessor.php(937): Wikimedia\Parsoid\Wt2Html\DOMPostProcessor->Wikimedia\Parsoid\Wt2Html\{closure}()
#6 /srv/wiki.example.com/vendor/wikimedia/parsoid/src/Wt2Html/DOMPostProcessor.php(987): Wikimedia\Parsoid\Wt2Html\DOMPostProcessor->doPostProcess()
#7 /srv/wiki.example.com/vendor/wikimedia/parsoid/src/Wt2Html/DOMPostProcessor.php(1004): Wikimedia\Parsoid\Wt2Html\DOMPostProcessor->process()
#8 /srv/wiki.example.com/vendor/wikimedia/parsoid/src/Wt2Html/ParserPipeline.php(178): Wikimedia\Parsoid\Wt2Html\DOMPostProcessor->processChunkily()
#9 /srv/wiki.example.com/vendor/wikimedia/parsoid/src/Wt2Html/ParserPipelineFactory.php(307): Wikimedia\Parsoid\Wt2Html\ParserPipeline->parseChunkily()
#10 /srv/wiki.example.com/vendor/wikimedia/parsoid/src/Core/WikitextContentModelHandler.php(106): Wikimedia\Parsoid\Wt2Html\ParserPipelineFactory->parse()
#11 /srv/wiki.example.com/vendor/wikimedia/parsoid/src/Parsoid.php(166): Wikimedia\Parsoid\Core\WikitextContentModelHandler->toDOM()
#12 /srv/wiki.example.com/vendor/wikimedia/parsoid/src/Parsoid.php(198): Wikimedia\Parsoid\Parsoid->parseWikitext()
#13 /srv/wiki.example.com/extensions/VisualEditor/includes/VEParsoid/src/Rest/Handler/ParsoidHandler.php(590): Wikimedia\Parsoid\Parsoid->wikitext2html()
#14 /srv/wiki.example.com/extensions/VisualEditor/includes/VEParsoid/src/Rest/Handler/PageHandler.php(90): VEParsoid\Rest\Handler\ParsoidHandler->wt2html()
#15 /srv/wiki.example.com/includes/Rest/Router.php(403): VEParsoid\Rest\Handler\PageHandler->execute()
#16 /srv/wiki.example.com/includes/Rest/Router.php(330): MediaWiki\Rest\Router->executeHandler()
#17 /srv/wiki.example.com/includes/Rest/EntryPoint.php(165): MediaWiki\Rest\Router->execute()
#18 /srv/wiki.example.com/includes/Rest/EntryPoint.php(130): MediaWiki\Rest\EntryPoint->execute()
#19 /srv/wiki.example.com/rest.php(31): MediaWiki\Rest\EntryPoint::main()
#20 {main}What should have happened instead?:
The visual editor should have opened.
Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc.:
Mediawiki 1.37.2
PHP 8.1.5