Bug 292794 – [MacOS Debug wk2] ASSERTION FAILED: m_verticalScrollerImpDelegate in http/tests/media/media-play-stream-chunked-icy.html (flaky in EWS)

• Component: Scrolling
• Status: NEW

[Marta Darbinyan]

The following test is flaky crash in macOS. First crash occurred on 291877@main. 
http/tests/media/media-play-stream-chunked-icy.html

stderr:
ASSERTION FAILED: m_verticalScrollerImpDelegate
/Volumes/Data/worker/macOS-Sequoia-Debug-Build-EWS/build/Source/WebCore/platform/mac/ScrollbarsControllerMac.mm(845) : virtual void WebCore::ScrollbarsControllerMac::willRemoveVerticalScrollbar(Scrollbar *)
1   0x300862e34 WebCore::ScrollbarsControllerMac::willRemoveVerticalScrollbar(WebCore::Scrollbar*)
2   0x306266718 WebCore::ScrollableArea::willRemoveScrollbar(WebCore::Scrollbar&, WebCore::ScrollbarOrientation)
3   0x305f09cc0 WebCore::LocalFrameView::willRemoveScrollbar(WebCore::Scrollbar&, WebCore::ScrollbarOrientation)
4   0x30625bb10 WebCore::ScrollView::setHasScrollbarInternal(WTF::RefPtr<WebCore::Scrollbar, WTF::RawPtrTraits<WebCore::Scrollbar>, WTF::DefaultRefDerefTraits<WebCore::Scrollbar>>&, WebCore::ScrollbarOrientation, bool, bool*)
5   0x30625bbe4 WebCore::ScrollView::setHasVerticalScrollbar(bool, bool*)
6   0x305eea410 WebCore::LocalFrameView::willBeDestroyed()
7   0x306f3478c WebCore::RenderWidget::willBeDestroyed()
8   0x306e6c704 WebCore::RenderObject::destroy()
9   0x306e6c4f4 WebCore::RenderObjectDeleter::operator()(WebCore::RenderObject*) const
10  0x306d240e8 std::__1::unique_ptr<WebCore::RenderObject, WebCore::RenderObjectDeleter>::reset[abi:sn180100](WebCore::RenderObject*)
11  0x306d24070 std::__1::unique_ptr<WebCore::RenderObject, WebCore::RenderObjectDeleter>::~unique_ptr[abi:sn180100]()
12  0x306d03e48 std::__1::unique_ptr<WebCore::RenderObject, WebCore::RenderObjectDeleter>::~unique_ptr[abi:sn180100]()
13  0x3071202fc WebCore::RenderTreeBuilder::destroy(WebCore::RenderObject&, WebCore::RenderTreeBuilder::CanCollapseAnonymousBlock)
14  0x30712666c WebCore::RenderTreeBuilder::destroyAndCleanUpAnonymousWrappers(WebCore::RenderObject&, WebCore::RenderElement const*)
15  0x30714c9f4 WebCore::RenderTreeUpdater::tearDownRenderers(WebCore::Element&, WebCore::RenderTreeUpdater::TeardownType, WebCore::RenderTreeBuilder&)::$_1::operator()(unsigned int) const
16  0x30714b06c WebCore::RenderTreeUpdater::tearDownRenderers(WebCore::Element&, WebCore::RenderTreeUpdater::TeardownType, WebCore::RenderTreeBuilder&)
17  0x30714c168 WebCore::RenderTreeUpdater::tearDownRenderers(WebCore::Element&, WebCore::RenderTreeUpdater::TeardownType)
18  0x30714c208 WebCore::RenderTreeUpdater::tearDownRenderers(WebCore::Element&)
19  0x304c8eb8c WebCore::Document::destroyRenderTree()
20  0x304c8f0f4 WebCore::Document::willBeRemovedFromFrame()
21  0x305eac5cc WebCore::LocalFrame::setView(WTF::RefPtr<WebCore::LocalFrameView, WTF::RawPtrTraits<WebCore::LocalFrameView>, WTF::DefaultRefDerefTraits<WebCore::LocalFrameView>>&&)
22  0x305eb0efc WebCore::LocalFrame::createView(WebCore::IntSize const&, std::__1::optional<WebCore::Color> const&, WebCore::IntSize const&, bool, WebCore::ScrollbarMode, bool, WebCore::ScrollbarMode, bool)
23  0x11e28c8ec WebKit::WebLocalFrameLoaderClient::transitionToCommittedForNewPage(WebCore::LocalFrameLoaderClient::InitializingIframe)
24  0x305b70830 WebCore::FrameLoader::transitionToCommitted(WebCore::CachedPage*)
25  0x305b6f328 WebCore::FrameLoader::commitProvisionalLoad()
26  0x305aedd1c WebCore::DocumentLoader::commitIfReady()
27  0x305aee3b4 WebCore::DocumentLoader::finishedLoading()
28  0x305afc9c0 WebCore::DocumentLoader::maybeLoadEmpty()
29  0x305afcddc WebCore::DocumentLoader::startLoadingMainResource()
30  0x305bd7598 WebCore::FrameLoader::continueLoadAfterNavigationPolicy(WebCore::ResourceRequest const&, WebCore::FormState*, WebCore::NavigationPolicyDecision, WebCore::AllowNavigationToInvalidURL)::$_0::operator()()
31  0x305bd7100 WTF::Detail::CallableWrapper<WebCore::FrameLoader::continueLoadAfterNavigationPolicy(WebCore::ResourceRequest const&, WebCore::FormState*, WebCore::NavigationPolicyDecision, WebCore::AllowNavigationToInvalidURL)::$_0, void>::call()
com.apple.WebKit.WebContent.Development terminated (pid 26284) for reason: crash
LEAK: 1 WebPageProxy

Test history:
https://results.webkit.org/?suite=layout-tests&test=http%2Ftests%2Fmedia%2Fmedia-play-stream-chunked-icy.html&style=debug&flavor=wk2

Test result from EWS:
https://ews-build.webkit.org/#/builders/122/builds/21967

[Radar WebKit Bug Importer]

<rdar://problem/151025338>

[EWS]

Test gardening commit 294732@main (6612644f987d): <https://commits.webkit.org/294732@main>

Reviewed commits have been landed. Closing PR #45189 and removing active labels.