232946 2021-11-10 09:19:28 -0800 REGRESSION (r285503): ASSERTION FAILED: m_wasConstructedOnMainThread == isMainThread() under WebCore::BroadcastChannel 2021-11-10 09:22:24 -0800 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 232920 https://bugs.webkit.org/show_bug.cgi?id=232693 InRadar P2 Normal --- 1 ryanhaddad webkit-unassigned achristensen cdumez webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 1813643 0 ryanhaddad 2021-11-10 09:19:28 -0800 imported/w3c/web-platform-tests/webmessaging/broadcastchannel/workers.html is intermittently failing with the assertion below on iOS and macOS debug bots: ASSERTION FAILED: m_wasConstructedOnMainThread == isMainThread() /Volumes/Data/worker/monterey-debug/build/WebKitBuild/Debug/usr/local/include/wtf/CallbackAggregator.h(41) : WTF::CallbackAggregator::~CallbackAggregator() 1 0x139f32890 WTFCrash 2 0x105838170 WTF::NeverDestroyed<WTF::String, WTF::AnyThreadsAccessTraits>::operator WTF::String const&() const 3 0x108075070 WTF::CallbackAggregator::~CallbackAggregator() 4 0x108074fdc WTF::CallbackAggregator::~CallbackAggregator() 5 0x108074fac WTF::ThreadSafeRefCounted<WTF::CallbackAggregator, (WTF::DestructionThread)0>::deref() const::'lambda'()::operator()() const 6 0x108074f20 WTF::ThreadSafeRefCounted<WTF::CallbackAggregator, (WTF::DestructionThread)0>::deref() const 7 0x108074eb0 WTF::Ref<WTF::CallbackAggregator, WTF::RawPtrTraits<WTF::CallbackAggregator> >::~Ref() 8 0x10806db94 WTF::Ref<WTF::CallbackAggregator, WTF::RawPtrTraits<WTF::CallbackAggregator> >::~Ref() 9 0x108072adc WebCore::BroadcastChannel::dispatchMessageTo(WTF::ObjectIdentifier<WebCore::BroadcastChannelIdentifierType>, WTF::Ref<WebCore::SerializedScriptValue, WTF::RawPtrTraits<WebCore::SerializedScriptValue> >&&, WTF::CompletionHandler<void ()>&&)::$_4::~$_4() 10 0x10806db68 WebCore::BroadcastChannel::dispatchMessageTo(WTF::ObjectIdentifier<WebCore::BroadcastChannelIdentifierType>, WTF::Ref<WebCore::SerializedScriptValue, WTF::RawPtrTraits<WebCore::SerializedScriptValue> >&&, WTF::CompletionHandler<void ()>&&)::$_4::~$_4() 11 0x10807e614 WTF::Detail::CallableWrapper<WebCore::BroadcastChannel::dispatchMessageTo(WTF::ObjectIdentifier<WebCore::BroadcastChannelIdentifierType>, WTF::Ref<WebCore::SerializedScriptValue, WTF::RawPtrTraits<WebCore::SerializedScriptValue> >&&, WTF::CompletionHandler<void ()>&&)::$_4, void, WebCore::ScriptExecutionContext&>::~CallableWrapper() 12 0x10807e508 WTF::Detail::CallableWrapper<WebCore::BroadcastChannel::dispatchMessageTo(WTF::ObjectIdentifier<WebCore::BroadcastChannelIdentifierType>, WTF::Ref<WebCore::SerializedScriptValue, WTF::RawPtrTraits<WebCore::SerializedScriptValue> >&&, WTF::CompletionHandler<void ()>&&)::$_4, void, WebCore::ScriptExecutionContext&>::~CallableWrapper() ASSERTION FAILED: m_wasConstructedOnMainThread == isMainThread() /Volumes/Data/worker/monterey-debug/build/WebKitBuild/Debug/usr/local/include/wtf/CallbackAggregator.h(41) : WTF::CallbackAggregator::~CallbackAggregator() 13 0x10807e534 WTF::Detail::CallableWrapper<WebCore::BroadcastChannel::dispatchMessageTo(WTF::ObjectIdentifier<WebCore::BroadcastChannelIdentifierType>, WTF::Ref<WebCore::SerializedScriptValue, WTF::RawPtrTraits<WebCore::SerializedScriptValue> >&&, WTF::CompletionHandler<void ()>&&)::$_4, void, WebCore::ScriptExecutionContext&>::~CallableWrapper() https://results.webkit.org/?suite=layout-tests&test=imported/w3c/web-platform-tests/webmessaging/broadcastchannel/workers.html 1813644 1 webkit-bug-importer 2021-11-10 09:19:44 -0800 <rdar://problem/85256988> 1813645 2 ryanhaddad 2021-11-10 09:20:29 -0800 This appears to have started after r285503 1813646 3 achristensen 2021-11-10 09:22:24 -0800 *** This bug has been marked as a duplicate of bug 232920 ***