Description: tiled-drawing/scrolling/scroll-snap/scroll-snap-mandatory-async-overflow.html is a consistent crash The test was consistently passing until range https://commits.webkit.org/compare/263108@main...263104@main. The assertion references changes like setNodeScrollSnapInProgress made in https://commits.webkit.org/263108@main, making it the likely culprit. This issue can be reproduced using command: run-webkit-tests --exit-after-n-failures 1 --exit-after-n-crashes-or-timeouts 1 --iterations 1 --no-retry-failures --use-gpu-process --remote-layer-tree tiled-drawing/scrolling/scroll-snap/scroll-snap-mandatory-async-overflow.html History: https://results.webkit.org/?suite=layout-tests&test=tiled-drawing%2Fscrolling%2Fscroll-snap%2Fscroll-snap-mandatory-async-overflow.html&flavor=gpuprocess Crash Log: No crash log found for WebKitTestRunner:72968. stdout: stderr: ASSERTION FAILED: !m_impl || !m_shouldEnableAssertions || m_impl->wasConstructedOnMainThread() == isMainThread() /Volumes/Data/worker/Apple-Ventura-Debug-Build/build/WebKitBuild/Debug/usr/local/include/wtf/WeakPtr.h(139) : T *WTF::WeakPtr<WebKit::RemoteScrollingCoordinatorProxy>::operator->() const [T = WebKit::RemoteScrollingCoordinatorProxy, WeakPtrImpl = WTF::DefaultWeakPtrImpl] 1 0x12114f919 WTFCrash 2 0x15389cb8b WTFCrashWithInfo(int, char const*, char const*, int) 3 0x15568e41a WTF::WeakPtr<WebKit::RemoteScrollingCoordinatorProxy, WTF::DefaultWeakPtrImpl>::operator->() const 4 0x15568e7f1 WebKit::RemoteScrollingTree::scrollingTreeNodeDidBeginScrollSnapping(unsigned long long) 5 0x12e4e54fa WebCore::ScrollingTree::setNodeScrollSnapInProgress(unsigned long long, bool) 6 0x12e502302 WebCore::ScrollingTreeScrollingNode::setScrollSnapInProgress(bool) 7 0x12e508c22 WebCore::ThreadedScrollingTreeScrollingNodeDelegate::willStartScrollSnapAnimation() 8 0x12e57db30 WebCore::ScrollingEffectsController::startScrollSnapAnimation() 9 0x12c4610c9 WebCore::ScrollingEffectsController::processWheelEventForScrollSnap(WebCore::PlatformWheelEvent const&) 10 0x12c460407 WebCore::ScrollingEffectsController::handleWheelEvent(WebCore::PlatformWheelEvent const&) 11 0x12ba70589 WebCore::ScrollingTreeScrollingNodeDelegateMac::handleWheelEvent(WebCore::PlatformWheelEvent const&) 12 0x12ba74d87 WebCore::ScrollingTreeOverflowScrollingNodeMac::handleWheelEvent(WebCore::PlatformWheelEvent const&, WebCore::EventTargeting) 13 0x12e4e0da1 WebCore::ScrollingTree::handleWheelEvent(WebCore::PlatformWheelEvent const&, WTF::OptionSet<WebCore::WheelEventProcessingSteps>)::$_3::operator()() const 14 0x12e4e0a40 WebCore::ScrollingTree::handleWheelEvent(WebCore::PlatformWheelEvent const&, WTF::OptionSet<WebCore::WheelEventProcessingSteps>) 15 0x1556908fa WebKit::RemoteLayerTreeEventDispatcher::internalHandleWheelEvent(WebCore::PlatformWheelEvent const&, WTF::OptionSet<WebCore::WheelEventProcessingSteps>) 16 0x155690483 WebKit::RemoteLayerTreeEventDispatcher::scrollingThreadHandleWheelEvent(WebKit::WebWheelEvent const&, WebCore::RectEdges<bool>) 17 0x1556a82d8 WebKit::RemoteLayerTreeEventDispatcher::handleWheelEvent(WebKit::WebWheelEvent const&, WebCore::RectEdges<bool>)::$_10::operator()() const 18 0x1556a8209 WTF::Detail::CallableWrapper<WebKit::RemoteLayerTreeEventDispatcher::handleWheelEvent(WebKit::WebWheelEvent const&, WebCore::RectEdges<bool>)::$_10, void>::call() 19 0x12117a4b2 WTF::Function<void ()>::operator()() const 20 0x121210afe WTF::RunLoop::performWork() 21 0x121214aee WTF::RunLoop::performWork(void*) 22 0x7ff816c20b78 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ 23 0x7ff816c20b27 __CFRunLoopDoSource0 24 0x7ff816c20901 __CFRunLoopDoSources0 25 0x7ff816c1f57b __CFRunLoopRun 26 0x7ff816c1eb60 CFRunLoopRunSpecific 27 0x7ff816ca37aa CFRunLoopRun 28 0x121214fa6 WTF::RunLoop::run() 29 0x121212744 WTF::RunLoop::create(char const*, WTF::ThreadType, WTF::Thread::QOS)::$_1::operator()() const 30 0x1212126e9 WTF::Detail::CallableWrapper<WTF::RunLoop::create(char const*, WTF::ThreadType, WTF::Thread::QOS)::$_1, void>::call() 31 0x12117a4b2 WTF::Function<void ()>::operator()() const