Bug 242866

REGRESSION(252551@main-252554@main?) ASSERTION FAILED: ScriptDisallowedScope::InMainThread::isEventDispatchAllowedInSubtree(*this) in WebCore::Node::dispatchSubtreeModifiedEvent()

iOS tester bot is exiting early.

Buildbot: builder Apple-iOS-15-Simulator-Debug-WK2-Tests build 3170
https://build.webkit.org/#/builders/267/builds/3170

ASSERTION FAILED: ScriptDisallowedScope::InMainThread::isEventDispatchAllowedInSubtree(*this)
dom/Node.cpp(2412) : void WebCore::Node::dispatchSubtreeModifiedEvent()
1   0x30549bd59 WTFCrash
2   0x30549bd79 WTFCrashWithSecurityImplication
3   0x331e80590 WebCore::Node::dispatchSubtreeModifiedEvent()
4   0x331d9b0f5 WebCore::Element::didAddAttribute(WebCore::QualifiedName const&, WTF::AtomString const&)
5   0x331d9b010 WebCore::Element::addAttributeInternal(WebCore::QualifiedName const&, WTF::AtomString const&, WebCore::Element::SynchronizationOfLazyAttribute)
6   0x331d9295c WebCore::Element::setAttributeInternal(unsigned int, WebCore::QualifiedName const&, WTF::AtomString const&, WebCore::Element::SynchronizationOfLazyAttribute)
7   0x331d92e42 WebCore::Element::setAttributeWithoutSynchronization(WebCore::QualifiedName const&, WTF::AtomString const&)
8   0x331d9d9f4 WebCore::Element::setPseudo(WTF::AtomString const&)
9   0x33214c594 WebCore::BaseDateAndTimeInputType::createShadowSubtree()
10  0x33232dcb3 WebCore::InputType::createShadowSubtreeIfNeeded()
11  0x3322252b8 WebCore::HTMLInputElement::updateUserAgentShadowTree()
12  0x331ca730d WebCore::Document::resolveStyle(WebCore::Document::ResolveStyleType)
13  0x331ca83e9 WebCore::Document::updateStyleIfNeeded()
14  0x331cc58e6 WebCore::Document::finishedParsing()
15  0x332490288 WebCore::HTMLConstructionSite::finishedParsing()
16  0x3324d6540 WebCore::HTMLTreeBuilder::finished()
17  0x33249e243 WebCore::HTMLDocumentParser::end()
18  0x33249c0d1 WebCore::HTMLDocumentParser::attemptToRunDeferredScriptsAndEnd()
19  0x33249be09 WebCore::HTMLDocumentParser::prepareToStopParsing()
20  0x33249cbf7 WebCore::HTMLDocumentParser::endIfDelayed()
21  0x33249e610 WebCore::HTMLDocumentParser::resumeParsingAfterScriptExecution()
22  0x33249e99c WebCore::HTMLDocumentParser::notifyFinished(WebCore::PendingScript&)
23  0x331e9f61a WebCore::PendingScript::notifyClientFinished()
24  0x331e9f679 WebCore::PendingScript::notifyFinished(WebCore::LoadableScript&)
25  0x331e3b9dc WebCore::LoadableScript::notifyClientFinished()
26  0x331e3b752 WebCore::LoadableClassicScript::notifyFinished(WebCore::CachedResource&, WebCore::NetworkLoadMetrics const&)
27  0x332ae7538 WebCore::CachedResource::checkNotify(WebCore::NetworkLoadMetrics const&)
28  0x332ada914 WebCore::CachedResource::finishLoading(WebCore::FragmentedSharedBuffer const*, WebCore::NetworkLoadMetrics const&)
29  0x332b2f292 WebCore::CachedScript::finishLoading(WebCore::FragmentedSharedBuffer const*, WebCore::NetworkLoadMetrics const&)
30  0x332a59a1b WebCore::SubresourceLoader::didFinishLoading(WebCore::NetworkLoadMetrics const&)
31  0x2e8771c06 WebKit::WebResourceLoader::didFinishResourceLoad(WebCore::NetworkLoadMetrics&&)
com.apple.WebKit.WebContent.Development terminated (pid 31469) for reason: crash