(gdb) bt
#0  std::__uniq_ptr_impl<content::RenderFrameHostImpl, std::default_delete<content::RenderFrameHostImpl> >::_M_ptr (this=0x3b2a2f2a2c670129)
    at /usr/include/c++/9.3.0/bits/unique_ptr.h:154
#1  0x00007fffe28cfad2 in std::unique_ptr<content::RenderFrameHostImpl, std::default_delete<content::RenderFrameHostImpl> >::get (
    this=0x3b2a2f2a2c670129) at /usr/include/c++/9.3.0/bits/unique_ptr.h:361
#2  0x00007fffe28cf254 in content::RenderFrameHostManager::current_frame_host (this=0x3b2a2f2a2c670111)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/content/browser/frame_host/render_frame_host_manager.h:201
#3  0x00007fffe28cf284 in content::FrameTreeNode::current_frame_host (this=0x3b2a2f2a2c670101)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/content/browser/frame_host/frame_tree_node.h:255
#4  0x00007fffe28ced63 in QtWebEngineCore::ProxyingURLLoaderFactoryQt::CreateLoaderAndStart (this=0x7fff22021680, loader=..., routing_id=1, 
    request_id=867657, options=2, request=..., client=..., traffic_annotation=...)
    at /build/qt5-webengine/src/qtwebengine-everywhere-src-5.15.0-beta2/src/core/net/proxying_url_loader_factory_qt.cpp:528
#5  0x00007fffe2d53a87 in network::mojom::URLLoaderFactoryStubDispatch::Accept (impl=0x7fff22021680, message=0x7fffa37fa880)
    at ./gen/services/network/public/mojom/url_loader_factory.mojom.cc:220
#6  0x00007fffe28be069 in network::mojom::URLLoaderFactoryStub<mojo::RawPtrImplRefTraits<network::mojom::URLLoaderFactory> >::Accept (
    this=0x7fff2220d6c0, message=0x7fffa37fa880) at gen/services/network/public/mojom/url_loader_factory.mojom.h:132
#7  0x00007fffe89e491b in mojo::InterfaceEndpointClient::HandleValidatedMessage (this=0x7fff2220e760, message=0x7fffa37fa880)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/public/cpp/bindings/lib/interface_endpoint_client.cc:553
#8  0x00007fffe89e1e83 in mojo::InterfaceEndpointClient::HandleIncomingMessageThunk::Accept (this=0x7fff2220e870, message=0x7fffa37fa880)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/public/cpp/bindings/lib/interface_endpoint_client.cc:140
#9  0x00007fffe89ed142 in mojo::MessageDispatcher::Accept (this=0x7fff2220e880, message=0x7fffa37fa880)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/public/cpp/bindings/lib/message_dispatcher.cc:46
#10 0x00007fffe89e3870 in mojo::InterfaceEndpointClient::HandleIncomingMessage (this=0x7fff2220e760, message=0x7fffa37fa880)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/public/cpp/bindings/lib/interface_endpoint_client.cc:356
#11 0x00007fffe89f0f69 in mojo::internal::MultiplexRouter::ProcessIncomingMessage (this=0x7fff2220d790, message_wrapper=0x7fffa37fab10, 
    client_call_behavior=mojo::internal::MultiplexRouter::ALLOW_DIRECT_CLIENT_CALLS, current_task_runner=0x55555593d7e0)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/public/cpp/bindings/lib/multiplex_router.cc:877
#12 0x00007fffe89ef78b in mojo::internal::MultiplexRouter::Accept (this=0x7fff2220d790, message=0x7fffa37fb340)
--Type <RET> for more, q to quit, c to continue without paging--
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/public/cpp/bindings/lib/multiplex_router.cc:598
#13 0x00007fffe89ed0b2 in mojo::MessageDispatcher::Accept (this=0x7fff2220d7c8, message=0x7fffa37fb340)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/public/cpp/bindings/lib/message_dispatcher.cc:41
#14 0x00007fffe89d74cd in mojo::Connector::DispatchMessage (this=0x7fff2220d7f8, message=...)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/public/cpp/bindings/lib/connector.cc:605
#15 0x00007fffe89d7aae in mojo::Connector::ReadAllAvailableMessages (this=0x7fff2220d7f8)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/public/cpp/bindings/lib/connector.cc:680
#16 0x00007fffe89d6855 in mojo::Connector::OnHandleReadyInternal (this=0x7fff2220d7f8, result=0)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/public/cpp/bindings/lib/connector.cc:513
#17 0x00007fffe89d6562 in mojo::Connector::OnWatcherHandleReady (this=0x7fff2220d7f8, result=0)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/public/cpp/bindings/lib/connector.cc:474
#18 0x00007fffe89dd025 in base::internal::FunctorTraits<void (mojo::Connector::*)(unsigned int), void>::Invoke<void (mojo::Connector::*)(unsigned int), mojo::Connector*, unsigned int> (method=
    (void (mojo::Connector::*)(mojo::Connector * const, unsigned int)) 0x7fffe89d6542 <mojo::Connector::OnWatcherHandleReady(unsigned int)>, 
    receiver_ptr=@0x7fffa37fb858: 0x7fff2220d7f8) at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/bind_internal.h:498
#19 0x00007fffe89dc52b in base::internal::InvokeHelper<false, void>::MakeItSo<void (mojo::Connector::* const&)(unsigned int), mojo::Connector*, unsigned int> (functor=
    @0x7fff221dcc10: (void (mojo::Connector::*)(mojo::Connector * const, unsigned int)) 0x7fffe89d6542 <mojo::Connector::OnWatcherHandleReady(unsigned int)>) at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/bind_internal.h:598
#20 0x00007fffe89dba54 in base::internal::Invoker<base::internal::BindState<void (mojo::Connector::*)(unsigned int), base::internal::UnretainedWrapper<mojo::Connector> >, void (unsigned int)>::RunImpl<void (mojo::Connector::* const&)(unsigned int), std::tuple<base::internal::UnretainedWrapper<mojo::Connector> > const&, 0ul>(void (mojo::Connector::* const&)(unsigned int), std::tuple<base::internal::UnretainedWrapper<mojo::Connector> > const&, std::integer_sequence<unsigned long, 0ul>, unsigned int&&) (functor=
    @0x7fff221dcc10: (void (mojo::Connector::*)(mojo::Connector * const, unsigned int)) 0x7fffe89d6542 <mojo::Connector::OnWatcherHandleReady(unsigned int)>, bound=std::tuple containing = {...}, unbound_args#0=@0x7fffa37fb884: 0)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/bind_internal.h:672
#21 0x00007fffe89dadc2 in base::internal::Invoker<base::internal::BindState<void (mojo::Connector::*)(unsigned int), base::internal::UnretainedWrapper<moj--Type <RET> for more, q to quit, c to continue without paging--
o::Connector> >, void (unsigned int)>::Run(base::internal::BindStateBase*, unsigned int) (base=0x7fff221dcbf0, unbound_args#0=0)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/bind_internal.h:654
#22 0x00007fffe287f482 in base::RepeatingCallback<void (unsigned int)>::Run(unsigned int) const & (this=0x7fff2220c678, args#0=0)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/callback.h:132
#23 0x00007fffe47c40dc in mojo::SimpleWatcher::DiscardReadyState(base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&) (callback=..., result=0, state=...)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/public/cpp/system/simple_watcher.h:194
#24 0x00007fffe47d0cfe in base::internal::FunctorTraits<void (*)(base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&), void>::Invoke<void (* const&)(base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&), base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&>(void (* const&)(base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&), base::RepeatingCallback<void (unsigned int)> const&, unsigned int&&, mojo::HandleSignalsState const&)
    (function=
    @0x7fff2220c670: 0x7fffe47c40b8 <mojo::SimpleWatcher::DiscardReadyState(base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&)>) at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/bind_internal.h:398
#25 0x00007fffe47cf1ee in base::internal::InvokeHelper<false, void>::MakeItSo<void (* const&)(base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&), base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&>(void (* const&)(base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&), base::RepeatingCallback<void (unsigned int)> const&, unsigned int&&, mojo::HandleSignalsState const&) (functor=
    @0x7fff2220c670: 0x7fffe47c40b8 <mojo::SimpleWatcher::DiscardReadyState(base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&)>) at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/bind_internal.h:598
#26 0x00007fffe47cc313 in base::internal::Invoker<base::internal::BindState<void (*)(base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&), base::RepeatingCallback<void (unsigned int)> >, void (unsigned int, mojo::HandleSignalsState const&)>::RunImpl<void (* const&)(base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&), std::tuple<base::RepeatingCallback<void (unsigned int)> > const&, 0ul>(void (* const&)(base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&), std::tuple<base::RepeatingCallback<void (unsigned int)> > const&, std::integer_sequence<unsigned long, 0ul>, unsigned int&&, mojo::HandleSignalsState const&) (functor=
    @0x7fff2220c670: 0x7fffe47c40b8 <mojo::SimpleWatcher::DiscardReadyState(base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&)>, bound=std::tuple containing = {...}, unbound_args#0=@0x7fffa37fba24: 0, unbound_args#1=...)
--Type <RET> for more, q to quit, c to continue without paging--
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/bind_internal.h:672
#27 0x00007fffe47c9a49 in base::internal::Invoker<base::internal::BindState<void (*)(base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&), base::RepeatingCallback<void (unsigned int)> >, void (unsigned int, mojo::HandleSignalsState const&)>::Run(base::internal::BindStateBase*, unsigned int, mojo::HandleSignalsState const&) (base=0x7fff2220c650, unbound_args#0=0, unbound_args#1=...)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/bind_internal.h:654
#28 0x00007fffe8a3666a in base::RepeatingCallback<void (unsigned int, mojo::HandleSignalsState const&)>::Run(unsigned int, mojo::HandleSignalsState const&) const & (this=0x7fffa37fbad0, args#0=0, args#1=...) at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/callback.h:132
#29 0x00007fffe8a35544 in mojo::SimpleWatcher::OnHandleReady (this=0x7fff2220dce0, watch_id=1, result=0, state=...)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/public/cpp/system/simple_watcher.cc:292
#30 0x00007fffe8a35ba9 in mojo::SimpleWatcher::Context::Notify (this=0x55555db0e690, result=0, signals_state=..., flags=0)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/public/cpp/system/simple_watcher.cc:118
#31 0x00007fffe8a3586d in mojo::SimpleWatcher::Context::CallNotify (event=0x7fffa37fbde0)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/public/cpp/system/simple_watcher.cc:57
#32 0x00007fffe49dd043 in mojo::core::WatcherDispatcher::InvokeWatchCallback (this=0x7fff2220de50, context=93825132455568, result=0, state=..., flags=0)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/core/watcher_dispatcher.cc:94
#33 0x00007fffe49dc94d in mojo::core::Watch::InvokeCallback (this=0x7fff2220c710, result=0, state=..., flags=0)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/core/watch.cc:78
#34 0x00007fffe49d2210 in mojo::core::RequestContext::~RequestContext (this=0x7fffa37fc120, __in_chrg=<optimized out>)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/core/request_context.cc:72
#35 0x00007fffe49b06e7 in mojo::core::NodeChannel::OnChannelMessage (this=0x7fff95f463e0, payload=0x7fff96121370, payload_size=2096, 
    handles=std::vector of length 0, capacity 0)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/core/node_channel.cc:737
#36 0x00007fffe4989f75 in mojo::core::Channel::TryDispatchMessage (this=0x7fff95d8ab60, buffer=..., size_hint=0x7fffa37fc8f0)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/core/channel.cc:713
#37 0x00007fffe4989892 in mojo::core::Channel::OnReadComplete (this=0x7fff95d8ab60, bytes_read=1488, next_read_size_hint=0x7fffa37fc8f0)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/core/channel.cc:611
#38 0x00007fffe49ebaa4 in mojo::core::(anonymous namespace)::ChannelPosix::OnFileCanReadWithoutBlocking (this=0x7fff95d8ab60, fd=440)
--Type <RET> for more, q to quit, c to continue without paging--
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/mojo/core/channel_posix.cc:294
#39 0x00007fffe82564b0 in base::MessagePumpLibevent::FdWatchController::OnFileCanReadWithoutBlocking (this=0x7fff95e27d50, fd=440, pump=0x7fff94001cd0)
    at ./../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/message_loop/message_pump_libevent.cc:83
#40 0x00007fffe8257f66 in base::MessagePumpLibevent::OnLibeventNotification (fd=440, flags=2, context=0x7fff95e27d50)
    at ./../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/message_loop/message_pump_libevent.cc:325
#41 0x00007fffdd90ee2a in ?? () from /usr/lib/libevent-2.1.so.7
#42 0x00007fffdd90f4cf in event_base_loop () from /usr/lib/libevent-2.1.so.7
#43 0x00007fffe8257491 in base::MessagePumpLibevent::Run (this=0x7fff94001cd0, delegate=0x555555612808)
    at ./../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/message_loop/message_pump_libevent.cc:213
#44 0x00007fffe8132f1f in base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run (this=0x555555612800, 
    application_tasks_allowed=true, timeout=...)
    at ./../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:463
#45 0x00007fffe80996c5 in base::RunLoop::Run (this=0x7fffa37fd840)
    at ./../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/run_loop.cc:156
#46 0x00007fffe819729d in base::Thread::Run (this=0x55555594b6d0, run_loop=0x7fffa37fd840)
    at ./../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/threading/thread.cc:304
#47 0x00007fffecdbc47e in content::BrowserProcessSubThread::IOThreadRun (this=0x55555594b6d0, run_loop=0x7fffa37fd840)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/content/browser/browser_process_sub_thread.cc:158
#48 0x00007fffecdbc0f9 in content::BrowserProcessSubThread::Run (this=0x55555594b6d0, run_loop=0x7fffa37fd840)
    at ../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/content/browser/browser_process_sub_thread.cc:110
#49 0x00007fffe81978b0 in base::Thread::ThreadMain (this=0x55555594b6d0)
    at ./../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/threading/thread.cc:375
#50 0x00007fffe8240263 in base::(anonymous namespace)::ThreadFunc (params=0x55555594b9a0)
    at ./../../../../qtwebengine-everywhere-src-5.15.0-beta2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:81
#51 0x00007fffe057646f in start_thread () from /usr/lib/libpthread.so.0
#52 0x00007ffff6cb53d3 in clone () from /usr/lib/libc.so.6