REGRESSION (GPUP?): ASSERTION FAILED: m_table under WebKit::RemoteResourceCache::releaseRemoteResource()

[Ryan Haddad]

Created attachment 455582 [details]
crash log

The following assertion failure is seen on iOS debug bots:

ASSERTION FAILED: m_table
/Volumes/Data/worker/ios-simulator-15-debug/build/WebKitBuild/Debug-iphonesimulator/usr/local/include/wtf/HashTable.h(602) : unsigned int WTF::HashTable<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>>, WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>>, std::variant<std::monostate, WTF::Ref<WebCore::ImageBuffer>, WTF::Ref<WebCore::NativeImage>, WTF::Ref<WebCore::Font>>>, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>>, std::variant<std::monostate, WTF::Ref<WebCore::ImageBuffer>, WTF::Ref<WebCore::NativeImage>, WTF::Ref<WebCore::Font>>>>, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>>>, WTF::HashMap<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>>, std::variant<std::monostate, WTF::Ref<WebCore::ImageBuffer>, WTF::Ref<WebCore::NativeImage>, WTF::Ref<WebCore::Font>>>::KeyValuePairTraits, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>>>>::deletedCount() const [Key = WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>>, Value = WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>>, std::variant<std::monostate, WTF::Ref<WebCore::ImageBuffer>, WTF::Ref<WebCore::NativeImage>, WTF::Ref<WebCore::Font>>>, Extractor = WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>>, std::variant<std::monostate, WTF::Ref<WebCore::ImageBuffer>, WTF::Ref<WebCore::NativeImage>, WTF::Ref<WebCore::Font>>>>, HashFunctions = WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>>>, Traits = WTF::HashMap<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>>, std::variant<std::monostate, WTF::Ref<WebCore::ImageBuffer>, WTF::Ref<WebCore::NativeImage>, WTF::Ref<WebCore::Font>>>::KeyValuePairTraits, KeyTraits = WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>>>]
1   0x13e900b09 WTFCrash
2   0x120e0bb4b WTFCrashWithInfo(int, char const*, char const*, int)
3   0x121a649a8 WTF::HashTable<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashMap<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >, WTF::HashTableTraits>::KeyValuePairTraits, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > > >::deletedCount() const
4   0x121a68d8a WTF::HashTable<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashMap<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >, WTF::HashTableTraits>::KeyValuePairTraits, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > > >::remove(WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >*)
5   0x121a68d5a WTF::HashTable<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashMap<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >, WTF::HashTableTraits>::KeyValuePairTraits, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > > >::removeAndInvalidateWithoutEntryConsistencyCheck(WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >*)
6   0x121a68d1f WTF::HashTable<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashMap<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >, WTF::HashTableTraits>::KeyValuePairTraits, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > > >::removeWithoutEntryConsistencyCheck(WTF::HashTableIterator<WTF::HashTable<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashMap<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >, WTF::HashTableTraits>::KeyValuePairTraits, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > > >, WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashMap<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >, WTF::HashTableTraits>::KeyValuePairTraits, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > > >)
7   0x121a68a45 WTF::HashMap<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >, WTF::HashTableTraits>::remove(WTF::HashTableIteratorAdapter<WTF::HashTable<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashMap<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > >, WTF::DefaultHash<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > >, WTF::HashTraits<std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > >, WTF::HashTableTraits>::KeyValuePairTraits, WTF::HashTraits<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> > > >, WTF::KeyValuePair<WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::variant<std::__1::monostate, WTF::Ref<WebCore::ImageBuffer, WTF::RawPtrTraits<WebCore::ImageBuffer> >, WTF::Ref<WebCore::NativeImage, WTF::RawPtrTraits<WebCore::NativeImage> >, WTF::Ref<WebCore::Font, WTF::RawPtrTraits<WebCore::Font> > > > >)
8   0x121a6914e bool WebKit::QualifiedResourceHeap::remove<WebCore::Font>(WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, unsigned int&)
9   0x121a4ee5c WebKit::QualifiedResourceHeap::removeFont(WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >)
10  0x121a4d3fb WebKit::RemoteResourceCache::releaseRemoteResource(WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >)
11  0x121a4d1ef WebKit::RemoteRenderingBackend::releaseRemoteResourceWithQualifiedIdentifier(WebCore::ProcessQualified<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >)
12  0x121a4d12f WebKit::RemoteRenderingBackend::releaseRemoteResource(WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>)
13  0x1219fba82 void IPC::callMemberFunctionImpl<WebKit::RemoteRenderingBackend, void (WebKit::RemoteRenderingBackend::*)(WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>), std::__1::tuple<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, 0ul>(WebKit::RemoteRenderingBackend*, void (WebKit::RemoteRenderingBackend::*)(WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>), std::__1::tuple<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >&&, std::__1::integer_sequence<unsigned long, 0ul>)
14  0x1219fb9cd void IPC::callMemberFunction<WebKit::RemoteRenderingBackend, void (WebKit::RemoteRenderingBackend::*)(WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>), std::__1::tuple<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >, std::__1::integer_sequence<unsigned long, 0ul> >(std::__1::tuple<WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType> >&&, WebKit::RemoteRenderingBackend*, void (WebKit::RemoteRenderingBackend::*)(WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>))
15  0x1219e6a63 void IPC::handleMessage<Messages::RemoteRenderingBackend::ReleaseRemoteResource, WebKit::RemoteRenderingBackend, void (WebKit::RemoteRenderingBackend::*)(WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>)>(IPC::Connection&, IPC::Decoder&, WebKit::RemoteRenderingBackend*, void (WebKit::RemoteRenderingBackend::*)(WTF::ObjectIdentifier<WebCore::RenderingResourceIdentifierType>))
16  0x1219e5f1f WebKit::RemoteRenderingBackend::didReceiveStreamMessage(IPC::StreamServerConnectionBase&, IPC::Decoder&)
17  0x1222c5a3b IPC::StreamServerConnection::dispatchStreamMessage(IPC::Decoder&&, IPC::StreamMessageReceiver&)
18  0x1222c53d4 IPC::StreamServerConnection::dispatchStreamMessages(unsigned long)
19  0x1222c3ad4 IPC::StreamConnectionWorkQueue::processStreams()
20  0x1222cc7e0 IPC::StreamConnectionWorkQueue::startProcessingThread()::$_0::operator()()
21  0x1222cc799 WTF::Detail::CallableWrapper<IPC::StreamConnectionWorkQueue::startProcessingThread()::$_0, void>::call()
22  0x13e92e692 WTF::Function<void ()>::operator()() const
23  0x13ea04948 WTF::Thread::entryPoint(WTF::Thread::NewThreadContext*)
24  0x13ea12bb5 WTF::wtfThreadEntryPoint(void*)
25  0x7fff6bfee8fc _pthread_start
26  0x7fff6bfea443 thread_start

https://build.webkit.org/results/Apple-iOS-15-Simulator-Debug-WK2-Tests/r291751%20(2042)/results.html

[Ryan Haddad]

oof, sorry about the extra large backtrace there.

Saw this once with:
css3/scroll-snap/scroll-snap-property-computed-style.html

[Radar WebKit Bug Importer]

<rdar://problem/90732280>

[Said Abou-Hallawa]

This seems a threading issue in the RemoteResourceCache.

[Said Abou-Hallawa]

*** This bug has been marked as a duplicate of bug 238298 ***