Bug 280792 – [EWS] inspector/worker/debugger-pause-subworker.html flakily fails with ASSERTION FAILED: Unsafe to ref/deref from different threads

• Status: NEW
• Component: Web Inspector

[Marta Darbinyan]

The following test is pre-existing failure in Sonoma EWS and also flaky timeout failure crash on ToT.
inspector/worker/debugger-pause-subworker.html

Crash log:
ASSERTION FAILED: Unsafe to ref/deref from different threads
m_isOwnedByMainThread == isMainThread()
/Volumes/Data/worker/macOS-Sonoma-Debug-Build-EWS/build/WebKitBuild/Debug/usr/local/include/wtf/RefCounted.h(126) : void WTF::RefCountedBase::applyRefDerefThreadingCheck() const
1   0x32d9fac60 WTF::RefCountedBase::applyRefDerefThreadingCheck() const
2   0x32db15328 WTF::RefCountedBase::ref() const
3   0x332b166fc WTF::DefaultRefDerefTraits<WebCore::WorkerInspectorProxy>::ref(WebCore::WorkerInspectorProxy&)
4   0x332b166cc WTF::Ref<WebCore::WorkerInspectorProxy, WTF::RawPtrTraits<WebCore::WorkerInspectorProxy>, WTF::DefaultRefDerefTraits<WebCore::WorkerInspectorProxy>>::Ref(WebCore::WorkerInspectorProxy&)
5   0x332b118ac WTF::Ref<WebCore::WorkerInspectorProxy, WTF::RawPtrTraits<WebCore::WorkerInspectorProxy>, WTF::DefaultRefDerefTraits<WebCore::WorkerInspectorProxy>>::Ref(WebCore::WorkerInspectorProxy&)
6   0x332b17c30 WebCore::WorkerWorkerAgent::connectToAllWorkerInspectorProxies()
7   0x332af6e4c WebCore::InspectorWorkerAgent::enable()
8   0x11a76a1b4 Inspector::WorkerBackendDispatcher::enable(long, WTF::RefPtr<WTF::JSONImpl::Object, WTF::RawPtrTraits<WTF::JSONImpl::Object>, WTF::DefaultRefDerefTraits<WTF::JSONImpl::Object>>&&)
9   0x11a769f48 Inspector::WorkerBackendDispatcher::dispatch(long, WTF::String const&, WTF::Ref<WTF::JSONImpl::Object, WTF::RawPtrTraits<WTF::JSONImpl::Object>, WTF::DefaultRefDerefTraits<WTF::JSONImpl::Object>>&&)
10  0x11a7265c8 Inspector::BackendDispatcher::dispatch(WTF::String const&)
11  0x3329b95c4 WebCore::WorkerInspectorController::dispatchMessageFromFrontend(WTF::String const&)
12  0x3346349a0 WebCore::WorkerInspectorProxy::sendMessageToWorkerInspectorController(WTF::String const&)::$_13::operator()(WebCore::ScriptExecutionContext&) const
13  0x3346348e8 WTF::Detail::CallableWrapper<WebCore::WorkerInspectorProxy::sendMessageToWorkerInspectorController(WTF::String const&)::$_13, void, WebCore::ScriptExecutionContext&>::call(WebCore::ScriptExecutionContext&)
14  0x330529f80 WTF::Function<void (WebCore::ScriptExecutionContext&)>::operator()(WebCore::ScriptExecutionContext&) const
15  0x330ef2b4c WebCore::ScriptExecutionContext::Task::performTask(WebCore::ScriptExecutionContext&)
16  0x33464b1dc WebCore::WorkerDedicatedRunLoop::Task::performTask(WebCore::WorkerOrWorkletGlobalScope*)
17  0x33464a64c WebCore::WorkerDedicatedRunLoop::runInMode(WebCore::WorkerOrWorkletGlobalScope*, WebCore::ModePredicate const&)
18  0x334648bd8 WebCore::WorkerDedicatedRunLoop::run(WebCore::WorkerOrWorkletGlobalScope*)
19  0x334648b0c WebCore::WorkerOrWorkletThread::runEventLoop()
20  0x334648f20 WebCore::WorkerOrWorkletThread::workerOrWorkletThread()
21  0x33466de30 WebCore::WorkerThread::createThread()::$_18::operator()() const
22  0x33466dddc WTF::Detail::CallableWrapper<WebCore::WorkerThread::createThread()::$_18, void>::call()
23  0x118f18eb4 WTF::Function<void ()>::operator()() const
24  0x11904c828 WTF::Thread::entryPoint(WTF::Thread::NewThreadContext*)
25  0x119058eb0 WTF::wtfThreadEntryPoint(void*)
26  0x1942faf94 _pthread_start
27  0x1942f5d34 thread_start
com.apple.WebKit.WebContent.Development terminated (pid 9833) for reason: crash
LEAK: 2 WebPageProxy

Diff Link: https://build.webkit.org/results/Apple-Ventura-Debug-AppleSilicon-WK1-Tests/284442@main%20(7690)/inspector/worker/debugger-pause-subworker-crash-log.txt

Timeout errors:
@@ -1,4 +1,4 @@
-CONSOLE MESSAGE: TypeError: undefined is not an object (evaluating '[].x.x')
+FAIL: Timed out waiting for notifyDone to be called
 Ensure we can pause in Subworkers.

Diff Link: https://build.webkit.org/results/Apple-Sequoia-Debug-WK1-Tests/284496@main%20(100)/inspector/worker/debugger-pause-subworker-diff.txt

Failure logs:
 -- Running test case: Subworker.Debugger.Pause.Breakpoint
 Triggering pause...
-PASS: Should be paused in a Subworker CallFrame.
-PASS: Pause reason should be a breakpoint.
-PAUSE AT triggerBreakpoint:9:5
-      5
-      6    function triggerBreakpoint() {
-      7        let alpha = 1;
- ->   8        |let beta = 2; // BREAKPOINT
-      9        let gamma = 3;
-     10    }
-     11
+
+FAIL: Should be paused in a Subworker CallFrame.
+    Expected: WorkerTarget instance #2
+    Actual: DirectBackendTarget instance #1
+FAIL: Pause reason should be a breakpoint.
+    Expected: "breakpoint"
+    Actual: null
+PAUSE AT Global Code:1:1
+--- Source Unavailable ---

Diff link: https://build.webkit.org/results/Apple-Sequoia-Release-AppleSilicon-WK1-Tests/284513@main%20(166)/inspector/worker/debugger-pause-subworker-diff.txt


History:
https://results.webkit.org/?suite=layout-tests&test=inspector%2Fworker%2Fdebugger-pause-subworker.html

[Radar WebKit Bug Importer]

<rdar://problem/137162440>

[EWS]

Test gardening commit 284591@main (3ad53cf89c2b): <https://commits.webkit.org/284591@main>

Reviewed commits have been landed. Closing PR #34602 and removing active labels.

[EWS]

Test gardening commit 286649@main (fea3f59ff223): <https://commits.webkit.org/286649@main>

Reviewed commits have been landed. Closing PR #36713 and removing active labels.

[Alexey Proskuryakov]

*** Bug 284721 has been marked as a duplicate of this bug. ***