Bug 304865

Summary:	[macOS Debug ] ASSERTION FAILED: m_wrapper /Volumes/Data/worker/macOS-Tahoe-Debug-Build-EWS/build/Source/WebCore/bindings/js/JSEventListener in fast/webgpu/repro_301290.html
Product:	WebKit	Reporter:	Marta Darbinyan <darbinyan>
Component:	New Bugs	Assignee:	Mike Wyrzykowski <mwyrzykowski>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Marta Darbinyan

Reported 2026-01-02 14:45:10 PST

The following test is flaky crash in EWS and on main. fast/webgpu/repro_301290.html Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 com.apple.WebCore 0x300002734 WTFCrashWithInfo(int, char const*, char const*, int) 1 com.apple.WebCore 0x304919320 WebCore::JSEventListener::ensureJSFunction(WebCore::ScriptExecutionContext&) const 2 com.apple.WebCore 0x30491873c WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext&, WebCore::Event&) 3 com.apple.WebCore 0x3058c28ec WebCore::EventTarget::innerInvokeEventListeners(WebCore::Event&, WTF::Vector<WTF::RefPtr<WebCore::RegisteredEventListener, WTF::RawPtrTraits<WebCore::RegisteredEventListener>, WTF::DefaultRefDerefTraits<WebCore::RegisteredEventListener>>, 1ul, WTF::CrashOnOverflow, 2ul, WTF::FastMalloc>, WebCore::EventTarget::EventInvokePhase) 4 com.apple.WebCore 0x3058b572c WebCore::EventTarget::fireEventListeners(WebCore::Event&, WebCore::EventTarget::EventInvokePhase) 5 com.apple.WebCore 0x3058c22e4 WebCore::EventTarget::dispatchEvent(WebCore::Event&) 6 com.apple.WebCore 0x30560d8f4 WebCore::ActiveDOMObject::queueTaskToDispatchEventInternal(WebCore::EventTarget&, WebCore::TaskSource, WTF::Ref<WebCore::Event, WTF::RawPtrTraits<WebCore::Event>, WTF::DefaultRefDerefTraits<WebCore::Event>>&&)::$_0::operator()() const 7 com.apple.WebCore 0x30560d818 WTF::Detail::CallableWrapper<WebCore::ActiveDOMObject::queueTaskToDispatchEventInternal(WebCore::EventTarget&, WebCore::TaskSource, WTF::Ref<WebCore::Event, WTF::RawPtrTraits<WebCore::Event>, WTF::DefaultRefDerefTraits<WebCore::Event>>&&)::$_0, void>::call() 8 com.apple.WebCore 0x300036680 WTF::Function<void ()>::operator()() const 9 com.apple.WebCore 0x30560ddb0 WebCore::ActiveDOMObjectEventDispatchTask::execute() 10 com.apple.WebCore 0x3058bac60 WebCore::EventLoop::run(std::__1::optional<WTF::ApproximateTime>) 11 com.apple.WebCore 0x305ac7264 WebCore::WindowEventLoop::didReachTimeToRun() 12 com.apple.WebCore 0x305ad1124 WebCore::Timer::Timer<WebCore::WindowEventLoop, WebCore::WindowEventLoop>(WebCore::WindowEventLoop&, void (WebCore::WindowEventLoop::*)())::'lambda'()::operator()() const 13 com.apple.WebCore 0x305ad0f7c WTF::Detail::CallableWrapper<WebCore::Timer::Timer<WebCore::WindowEventLoop, WebCore::WindowEventLoop>(WebCore::WindowEventLoop&, void (WebCore::WindowEventLoop::*)())::'lambda'(), void>::call() 14 com.apple.WebCore 0x300036680 WTF::Function<void ()>::operator()() const 15 com.apple.WebCore 0x3001863b4 WebCore::Timer::fired() 16 com.apple.WebCore 0x306e5fa84 WebCore::ThreadTimers::sharedTimerFiredInternal() 17 com.apple.WebCore 0x306e6ab70 WebCore::ThreadTimers::setSharedTimer(WebCore::SharedTimer*)::$_0::operator()() const 18 com.apple.WebCore 0x306e6ab1c WTF::Detail::CallableWrapper<WebCore::ThreadTimers::setSharedTimer(WebCore::SharedTimer*)::$_0, void>::call() 19 com.apple.WebCore 0x300036680 WTF::Function<void ()>::operator()() const 20 com.apple.WebCore 0x306df5a9c WebCore::MainThreadSharedTimer::fired() Test result: https://ews-build.webkit.org/#/builders/161/builds/7853 Test history: https://results.webkit.org/?suite=layout-tests&test=fast%2Fwebgpu%2Frepro_301290.html&style=debug

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Radar WebKit Bug Importer

Comment 1 2026-01-02 14:45:31 PST

<rdar://problem/167454551>

EWS

Comment 2 2026-01-02 17:44:41 PST

Test gardening commit 305059@main (6dc3b551ab65): <https://commits.webkit.org/305059@main> Reviewed commits have been landed. Closing PR #56031 and removing active labels.

Mike Wyrzykowski

Comment 3 2026-03-10 14:54:01 PDT

Pull request: https://github.com/WebKit/WebKit/pull/60303

EWS

Comment 4 2026-03-11 10:19:28 PDT

Committed 309069@main (55d80701138a): <https://commits.webkit.org/309069@main> Reviewed commits have been landed. Closing PR #60303 and removing active labels.

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