http/tests/notifications/notification.html is crashing when notification permission is granted: Thread 1 (Thread 0x7f8531f9b9c0 (LWP 67318)): #0 0x00007f853b26c440 in WebKit::ShareableBitmap::data() const () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #1 0x00007f853b2d2f13 in WebKit::ShareableBitmap::createGraphicsContext() () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #2 0x00007f853b27b2c1 in IPC::encodeImage(IPC::Encoder&, WebCore::Image&) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #3 0x00007f853b67d2af in unsigned long IPC::Connection::sendWithAsyncReply<Messages::NotificationManagerMessageHandler::ShowNotification, WTF::CompletionHandler<void ()> >(Messages::NotificationManagerMessageHandler::ShowNotification&&, WTF::CompletionHandler<void ()>&&, unsigned long, WTF::OptionSet<IPC::SendOption>) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #4 0x00007f853b67d3ad in WTF::Detail::CallableWrapper<WebKit::WebNotificationManager::sendNotificationMessageWithAsyncReply<Messages::NotificationManagerMessageHandler::ShowNotification>(Messages::NotificationManagerMessageHandler::ShowNotification&&, WebCore::Notification&, WebKit::WebPage*, WTF::CompletionHandler<void ()>&&)::{lambda(auto:1&, auto:2)#1}, bool, IPC::Connection&, unsigned long>::call(IPC::Connection&, unsigned long) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #5 0x00007f853b676b5c in WebKit::WebNotificationManager::show(WebCore::Notification&, WebKit::WebPage*, WTF::CompletionHandler<void ()>&&) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #6 0x00007f853b6bf2ef in WTF::Detail::CallableWrapper<WebKit::WebNotificationClient::show(WebCore::Notification&, WTF::CompletionHandler<void ()>&&)::{lambda()#1}, void>::call() () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #7 0x00007f85388d040b in WTF::callOnMainRunLoopAndWait(WTF::Function<void ()>&&) () at /app/webkit/WebKitBuild/Release/lib/libjavascriptcoregtk-4.1.so.0 #8 0x00007f853b6c6d51 in WebKit::WebNotificationClient::show(WebCore::Notification&, WTF::CompletionHandler<void ()>&&) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #9 0x00007f853c561460 in WTF::Detail::CallableWrapper<WebCore::Notification::show(WTF::CompletionHandler<void ()>&&)::{lambda(WTF::RefPtr<WebCore::NotificationResources, WTF::RawPtrTraits<WebCore::NotificationResources>, WTF::DefaultRefDerefTraits<WebCore::NotificationResources> >&&)#1}, void, WTF::RefPtr<WebCore::NotificationResources, WTF::RawPtrTraits<WebCore::NotificationResources>, WTF::DefaultRefDerefTraits<WebCore::NotificationResources> >&&>::call(WTF::RefPtr<WebCore::NotificationResources, WTF::RawPtrTraits<WebCore::NotificationResources>, WTF::DefaultRefDerefTraits<WebCore::NotificationResources> >&&) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #10 0x00007f853c56392f in WebCore::NotificationResourcesLoader::didFinishLoadingResource(WebCore::NotificationResourcesLoader::ResourceLoader*) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #11 0x00007f853c563f12 in WebCore::NotificationResourcesLoader::ResourceLoader::didFinishLoading(WTF::ObjectIdentifier<WebCore::ResourceLoader>, WebCore::NetworkLoadMetrics const&) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #12 0x00007f853d1d4cc5 in WebCore::CachedResource::checkNotify(WebCore::NetworkLoadMetrics const&) [clone .part.0] () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #13 0x00007f853d1d59dc in WebCore::CachedRawResource::finishLoading(WebCore::FragmentedSharedBuffer const*, WebCore::NetworkLoadMetrics const&) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #14 0x00007f853d193b03 in WebCore::SubresourceLoader::didFinishLoading(WebCore::NetworkLoadMetrics const&) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #15 0x00007f853b01f233 in void IPC::handleMessage<Messages::WebResourceLoader::DidFinishResourceLoad, WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics&&)>(IPC::Connection&, IPC::Decoder&, WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics&&)) [clone .isra.0] () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #16 0x00007f853b0230fc in WebKit::WebResourceLoader::didReceiveWebResourceLoaderMessage(IPC::Connection&, IPC::Decoder&) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #17 0x00007f853b24bda5 in IPC::Connection::dispatchMessage(std::unique_ptr<IPC::Decoder, std::default_delete<IPC::Decoder> >) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #18 0x00007f853b24da81 in IPC::Connection::dispatchOneIncomingMessage() () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #19 0x00007f85388e07bc in WTF::RunLoop::performWork() () at /app/webkit/WebKitBuild/Release/lib/libjavascriptcoregtk-4.1.so.0 #20 0x00007f8538957329 in WTF::RunLoop::RunLoop()::{lambda(void*)#1}::_FUN(void*) () at /app/webkit/WebKitBuild/Release/lib/libjavascriptcoregtk-4.1.so.0 #21 0x00007f8538957dbf in WTF::RunLoop::{lambda(_GSource*, int (*)(void*), void*)#1}::_FUN(_GSource*, int (*)(void*), void*) () at /app/webkit/WebKitBuild/Release/lib/libjavascriptcoregtk-4.1.so.0 #22 0x00007f8534b3c294 in g_main_dispatch (context=0x564f41126240) at ../glib/gmain.c:3381 #23 g_main_context_dispatch (context=0x564f41126240) at ../glib/gmain.c:4099 #24 0x00007f8534b3c638 in g_main_context_iterate (context=0x564f41126240, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4175 #25 0x00007f8534b3c943 in g_main_loop_run (loop=0x564f41081340) at ../glib/gmain.c:4373 #26 0x00007f8538957f00 in WTF::RunLoop::run() () at /app/webkit/WebKitBuild/Release/lib/libjavascriptcoregtk-4.1.so.0 #27 0x00007f853b73f5ce in int WebKit::AuxiliaryProcessMain<WebKit::WebProcessMainGtk>(int, char**) () at /app/webkit/WebKitBuild/Release/lib/libwebkit2gtk-4.1.so.0 #28 0x00007f8534482b80 in __libc_start_main (main=0x564f403b0970 <main>, argc=4, argv=0x7ffc97fa8d08, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc97fa8cf8) at ../csu/libc-start.c:332 #29 0x0000564f403b08ae in _start () at ../sysdeps/x86_64/start.S:120