290942 2025-04-02 13:24:35 -0700 REGRESSION(290131@main - 290177@main): [ iOS Debug ] Flaky ASSERTION FAILED: m_frame->view() == this on fast/viewport/ios/width-is-device-width-overflowing-body-overflow-hidden.html 2025-04-11 20:22:53 -0700 1 1 1 Unclassified WebKit Scrolling WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 1 y_karimi webkit-unassigned simon.fraser webkit-bot-watchers-bugzilla webkit-bug-importer wenson_hsieh oldest_to_newest 2108276 0 474809 y_karimi 2025-04-02 13:24:35 -0700 Created attachment 474809 width-is-device-width-overflowing-body-overflow-hidden-crash-log fast/viewport/ios/width-is-device-width-overflowing-body-overflow-hidden.html This test is a flaky crash on iOS Debug. HISTORY: https://results.webkit.org/?suite=layout-tests&test=fast%2Fviewport%2Fios%2Fwidth-is-device-width-overflowing-body-overflow-hidden.html STDERR: Attached REPRODUCIBILITY: I was able to reproduce this issue on the iOS 18.2 simulator at ToT using the following command: run-webkit-tests --ios-simulator fast/viewport/ios/width-is-device-width-overflowing-body-overflow-hidden.html --iterations 10 REGRESSION: According to the results dashboard the regression range appears to be 290131@main - 290177@main. However, I was unable to produce a passing result locally, within or before this range. 2108307 1 webkit-bug-importer 2025-04-02 15:03:30 -0700 <rdar://problem/148465112> 2108335 2 ews-feeder 2025-04-02 15:54:27 -0700 Test gardening commit 293129@main (be7d0a35dd87): <https://commits.webkit.org/293129@main> Reviewed commits have been landed. Closing PR #43493 and removing active labels. 2108360 3 ap 2025-04-02 17:02:08 -0700 ASSERTION FAILED: m_frame->view() == this /Volumes/Data/worker/Apple-iOS-18-Simulator-Debug-Build/build/Source/WebCore/page/LocalFrameView.cpp(4350) : virtual IntRect WebCore::LocalFrameView::windowClipRect() const 1 0x14c1eecbc WebCore::LocalFrameView::windowClipRect() const 2 0x14c1e90c0 WebCore::LocalFrameView::applyRecursivelyWithVisibleRect(WTF::Function<void (WebCore::LocalFrameView&, WebCore::IntRect const&)> const&) 3 0x14c1dd4d8 WebCore::LocalFrameView::viewportContentsChanged() 4 0x14c1eebe8 WebCore::LocalFrameView::scrollPositionChanged(WebCore::IntPoint const&, WebCore::IntPoint const&) 5 0x14c1f59d0 WebCore::LocalFrameView::scrollTo(WebCore::IntPoint const&) 6 0x14c5376f4 WebCore::ScrollView::setScrollOffset(WebCore::IntPoint const&) 7 0x14c53e9b4 WebCore::ScrollableArea::scrollPositionChanged(WebCore::IntPoint const&) 8 0x14c53eec0 WebCore::ScrollableArea::setScrollPositionFromAnimation(WebCore::IntPoint const&) 9 0x14c52af50 WebCore::ScrollAnimator::notifyPositionChanged(WebCore::FloatSize const&) 10 0x14c52a548 WebCore::ScrollAnimator::setCurrentPosition(WebCore::FloatPoint const&, WebCore::ScrollAnimator::NotifyScrollableArea) 11 0x14c52a494 WebCore::ScrollAnimator::scrollToPositionWithoutAnimation(WebCore::FloatPoint const&, WebCore::ScrollClamping) 12 0x14c53e3c4 WebCore::ScrollableArea::scrollToPositionWithoutAnimation(WebCore::FloatPoint const&, WebCore::ScrollClamping) 13 0x14c538e88 WebCore::ScrollView::updateScrollbars(WebCore::IntPoint const&)::$_0::operator()(WebCore::IntPoint) const 14 0x14c5349b4 WebCore::ScrollView::updateScrollbars(WebCore::IntPoint const&) 15 0x14c534800 WebCore::ScrollView::setScrollbarModes(WebCore::ScrollbarMode, WebCore::ScrollbarMode, bool, bool) 16 0x14c1dc48c WebCore::LocalFrameView::resetScrollbars() 17 0x14c1dbf54 WebCore::LocalFrameView::~LocalFrameView() 18 0x14c1dc6f4 WebCore::LocalFrameView::~LocalFrameView() 19 0x14c1dc7d8 WebCore::LocalFrameView::operator delete(WebCore::LocalFrameView*, std::destroying_delete_t, unsigned long) 20 0x14c1dc73c WebCore::LocalFrameView::~LocalFrameView() 21 0x1310b1b74 WTF::RefCounted<WebCore::Widget>::deref() const 22 0x1310b1ae4 WTF::DefaultRefDerefTraits<WebCore::LocalFrameView>::derefIfNotNull(WebCore::LocalFrameView*) 23 0x1310b1aa4 WTF::RefPtr<WebCore::LocalFrameView, WTF::RawPtrTraits<WebCore::LocalFrameView>, WTF::DefaultRefDerefTraits<WebCore::LocalFrameView>>::~RefPtr() 24 0x1310a9398 WTF::RefPtr<WebCore::LocalFrameView, WTF::RawPtrTraits<WebCore::LocalFrameView>, WTF::DefaultRefDerefTraits<WebCore::LocalFrameView>>::~RefPtr() 25 0x13436cfcc WebKit::WebLocalFrameLoaderClient::transitionToCommittedForNewPage(WebCore::LocalFrameLoaderClient::InitializingIframe) 26 0x14be6f148 WebCore::FrameLoader::transitionToCommitted(WebCore::CachedPage*) 27 0x14be6daa0 WebCore::FrameLoader::commitProvisionalLoad() 28 0x14bdea6e4 WebCore::DocumentLoader::commitIfReady() 29 0x14bdead84 WebCore::DocumentLoader::finishedLoading() 30 0x14bdf977c WebCore::DocumentLoader::maybeLoadEmpty() 31 0x14bdf9b98 WebCore::DocumentLoader::startLoadingMainResource() com.apple.WebKit.WebContent.Development terminated (pid 45820) for reason: crash LEAK: 2 WebPageProxy 2108361 4 ap 2025-04-02 17:03:27 -0700 Seeing that this happens when navigating to a blank document, this may be caused by a preceding test. I checked a recent run, and WKTR was restarted shortly before this, there were only two tests before it: 20:58:51.541 39062 worker/3 fast/viewport/ios/wide-desktop-viewport-in-enhanced-windowing-mode.html passed 20:58:52.223 39062 worker/3 fast/viewport/ios/width-is-device-width-overflowing-body-overflow-hidden-tall.html passed 20:58:52.573 39062 worker/3 com.apple.WebKit.WebContent.Development crash, pid = 45820 2108372 5 simon.fraser 2025-04-02 17:29:29 -0700 Range is https://commits.webkit.org/compare/290131@main...290177@main 474809 2025-04-02 13:24:35 -0700 2025-04-02 13:24:35 -0700 width-is-device-width-overflowing-body-overflow-hidden-crash-log width-is-device-width-overflowing-body-overflow-hidden-crash-log.txt text/plain 3321 y_karimi Tm8gY3Jhc2ggbG9nIGZvdW5kIGZvciBjb20uYXBwbGUuV2ViS2l0LldlYkNvbnRlbnQuRGV2ZWxv cG1lbnQ6NDU4MjAuCgpzdGRvdXQ6CgpzdGRlcnI6CkFTU0VSVElPTiBGQUlMRUQ6IG1fZnJhbWUt PnZpZXcoKSA9PSB0aGlzCi9Wb2x1bWVzL0RhdGEvd29ya2VyL0FwcGxlLWlPUy0xOC1TaW11bGF0 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