Bug 417742

Summary: falkon crashes when the app closes
Product: [Applications] Falkon Reporter: Pavel <color.of.dist>
Component: generalAssignee: David Rosca <nowrep>
Status: RESOLVED WORKSFORME    
Severity: crash CC: ab.kde, justin.zobel
Priority: NOR Keywords: drkonqi
Version First Reported In: 3.1.0   
Target Milestone: ---   
Platform: unspecified   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: KCrash trace from Falkon crash on exit

Description Pavel 2020-02-16 10:33:41 UTC 
Application: falkon (3.1.0)

Qt Version: 5.13.2
Frameworks Version: 5.67.0
Operating System: Linux 5.3.0-28-lowlatency x86_64
Windowing system: Wayland
Distribution: KDE neon User Edition 5.18

-- Information about the crash:
- What I was doing when the application crashed:
1. close the application and trying to open the application again.

The crash can be reproduced every time.

-- Backtrace:
Application: Falkon (falkon), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fa059e2e0c0 (LWP 20195))]

Thread 23 (Thread 0x7f9f7ca1f700 (LWP 21252)):
#0  0x00007fa04d74fed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f9f7ca1e6f0, expected=0, futex_word=0x7f9f7ca1e8c8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7f9f7ca1e790, mutex=0x7f9f7ca1e878, cond=0x7f9f7ca1e8a0) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7f9f7ca1e8a0, mutex=0x7f9f7ca1e878, abstime=0x7f9f7ca1e790) at pthread_cond_wait.c:667
#3  0x00007fa051a76146 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa051a76aed in base::WaitableEvent::TimedWaitUntil(base::TimeTicks const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fa051a76c82 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fa051a2f7a1 in base::internal::SchedulerWorker::Delegate::WaitForWork(base::WaitableEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fa051a32a7a in base::internal::SchedulerWorker::RunWorker() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fa051a32fd4 in base::internal::SchedulerWorker::RunPooledWorker() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fa04d7496db in start_thread (arg=0x7f9f7ca1f700) at pthread_create.c:463
#11 0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7fa0127fc700 (LWP 21211)):
#0  0x00007fa058052bf9 in __GI___poll (fds=0x7f9fec05faa0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa04bfd85c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa04bfd86dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa0589a5aaf in QEventDispatcherGlib::processEvents (this=0x7f9fec002060, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#4  0x00007fa058945f9a in QEventLoop::exec (this=this@entry=0x7fa0127fb9c0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007fa0587613aa in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007fa04e80a815 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fa058762b52 in QThreadPrivate::start (arg=0x559117d0bae0) at thread/qthread_unix.cpp:360
#8  0x00007fa04d7496db in start_thread (arg=0x7fa0127fc700) at pthread_create.c:463
#9  0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f9f7e43e700 (LWP 20392)):
#0  0x00007fa04d74f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f9f7e43d8d8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f9f7e43d888, cond=0x7f9f7e43d8b0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f9f7e43d8b0, mutex=0x7f9f7e43d888) at pthread_cond_wait.c:655
#3  0x00007fa051a7604a in base::ConditionVariable::Wait() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa051a76afc in base::WaitableEvent::TimedWaitUntil(base::TimeTicks const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fa051a76c3f in base::WaitableEvent::Wait() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fa051a2f775 in base::internal::SchedulerWorker::Delegate::WaitForWork(base::WaitableEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fa051a326e2 in base::internal::SchedulerWorker::RunWorker() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fa051a33014 in base::internal::SchedulerWorker::RunSharedWorker() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fa04d7496db in start_thread (arg=0x7f9f7e43e700) at pthread_create.c:463
#11 0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f9f7ec3f700 (LWP 20391)):
#0  0x00007fa05805fbb7 in epoll_wait (epfd=175, events=0x7f9f78002010, maxevents=32, timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fa04a1f72c5 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2  0x00007fa04a1ed114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fa051a7cacd in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa051a08aa6 in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fa051a40f59 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fa04d7496db in start_thread (arg=0x7f9f7ec3f700) at pthread_create.c:463
#8  0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f9f96ffd700 (LWP 20355)):
#0  0x00007fa058052bf9 in __GI___poll (fds=0x7f9f8c004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa04bfd85c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa04bfd86dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa0589a5acb in QEventDispatcherGlib::processEvents (this=0x7f9f8c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fa058945f9a in QEventLoop::exec (this=this@entry=0x7f9f96ffc9e0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007fa0587613aa in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007fa058762b52 in QThreadPrivate::start (arg=0x559113b1ed40) at thread/qthread_unix.cpp:360
#7  0x00007fa04d7496db in start_thread (arg=0x7f9f96ffd700) at pthread_create.c:463
#8  0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f9fb48da700 (LWP 20312)):
#0  0x00007fa04d74f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f9fb48d98d8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f9fb48d9888, cond=0x7f9fb48d98b0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f9fb48d98b0, mutex=0x7f9fb48d9888) at pthread_cond_wait.c:655
#3  0x00007fa051a7604a in base::ConditionVariable::Wait() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa051a76afc in base::WaitableEvent::TimedWaitUntil(base::TimeTicks const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fa051a76c3f in base::WaitableEvent::Wait() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fa051a2f775 in base::internal::SchedulerWorker::Delegate::WaitForWork(base::WaitableEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fa051a32a7a in base::internal::SchedulerWorker::RunWorker() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fa051a33014 in base::internal::SchedulerWorker::RunSharedWorker() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fa04d7496db in start_thread (arg=0x7f9fb48da700) at pthread_create.c:463
#11 0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f9fb7bec700 (LWP 20220)):
#0  0x00007fa04d74f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f9fb7beb8d8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f9fb7beb888, cond=0x7f9fb7beb8b0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f9fb7beb8b0, mutex=0x7f9fb7beb888) at pthread_cond_wait.c:655
#3  0x00007fa051a7604a in base::ConditionVariable::Wait() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa051a76afc in base::WaitableEvent::TimedWaitUntil(base::TimeTicks const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fa051a76c3f in base::WaitableEvent::Wait() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fa051a2f775 in base::internal::SchedulerWorker::Delegate::WaitForWork(base::WaitableEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fa051a32a7a in base::internal::SchedulerWorker::RunWorker() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fa051a33054 in base::internal::SchedulerWorker::RunDedicatedWorker() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fa04d7496db in start_thread (arg=0x7f9fb7bec700) at pthread_create.c:463
#11 0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f9fb83ed700 (LWP 20219)):
#0  0x00007fa05805fbb7 in epoll_wait (epfd=66, events=0x7f9fb0002010, maxevents=32, timeout=30000) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fa04a1f72c5 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2  0x00007fa04a1ed114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fa051a7cbaa in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa051a08aa6 in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fa051a40f59 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fa04d7496db in start_thread (arg=0x7f9fb83ed700) at pthread_create.c:463
#8  0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f9fe2585700 (LWP 20217)):
#0  0x00007fa058052bf9 in __GI___poll (fds=0x7f9fc8007030, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa01834a481 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007fa01833be40 in pa_mainloop_poll () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007fa01833c4d0 in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007fa01833c560 in pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007fa01834a3c9 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007fa0180ec318 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007fa04d7496db in start_thread (arg=0x7f9fe2585700) at pthread_create.c:463
#8  0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f9fe37fe700 (LWP 20215)):
#0  0x00007fa04d74f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f9fe37fd828) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f9fe37fd7d8, cond=0x7f9fe37fd800) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f9fe37fd800, mutex=0x7f9fe37fd7d8) at pthread_cond_wait.c:655
#3  0x00007fa051a7604a in base::ConditionVariable::Wait() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa051a76afc in base::WaitableEvent::TimedWaitUntil(base::TimeTicks const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fa051a76c3f in base::WaitableEvent::Wait() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fa0519e6b6f in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fa051a08aa6 in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fa051a40f59 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fa04d7496db in start_thread (arg=0x7f9fe37fe700) at pthread_create.c:463
#11 0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fa010ff9700 (LWP 20213)):
#0  0x00007fa05805fbb7 in epoll_wait (epfd=38, events=0x7f9fe8002010, maxevents=32, timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fa04a1f72c5 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2  0x00007fa04a1ed114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fa051a7cacd in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa051a08aa6 in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fa051a40f59 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fa04d7496db in start_thread (arg=0x7fa010ff9700) at pthread_create.c:463
#8  0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fa0117fa700 (LWP 20212)):
#0  0x00007fa04d74fed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fa0117f9670, expected=0, futex_word=0x7fa0117f9848) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fa0117f9710, mutex=0x7fa0117f97f8, cond=0x7fa0117f9820) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fa0117f9820, mutex=0x7fa0117f97f8, abstime=0x7fa0117f9710) at pthread_cond_wait.c:667
#3  0x00007fa051a76146 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa051a76aed in base::WaitableEvent::TimedWaitUntil(base::TimeTicks const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fa0519e6b80 in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fa051a08aa6 in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fa051a40f59 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fa04d7496db in start_thread (arg=0x7fa0117fa700) at pthread_create.c:463
#10 0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fa011ffb700 (LWP 20211)):
[KCrash Handler]
#6  0x00007fa052110b62 in net::SSLConfigService::RemoveObserver(net::SSLConfigService::Observer*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fa05206891f in net::SpdySessionPool::~SpdySessionPool() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fa051fe40e5 in net::HttpNetworkSession::~HttpNetworkSession() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fa052a8d3f9 in network::ProxyResolvingClientSocketFactory::~ProxyResolvingClientSocketFactory() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fa052a80be8 in network::P2PSocketManager::~P2PSocketManager() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fa052a80db1 in network::P2PSocketManager::~P2PSocketManager() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fa052a664e8 in network::NetworkContext::DestroySocketManager(network::P2PSocketManager*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007fa052a7a421 in network::P2PSocketManager::OnConnectionError() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007fa051d87f54 in mojo::InterfaceEndpointClient::NotifyError(base::Optional<mojo::DisconnectReason> const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007fa051d8abc3 in mojo::internal::MultiplexRouter::ProcessNotifyErrorTask(mojo::internal::MultiplexRouter::Task*, mojo::internal::MultiplexRouter::ClientCallBehavior, base::SequencedTaskRunner*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007fa051d8cb3d in mojo::internal::MultiplexRouter::ProcessTasks(mojo::internal::MultiplexRouter::ClientCallBehavior, base::SequencedTaskRunner*) [clone .part.230] () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007fa051d90c40 in mojo::internal::MultiplexRouter::OnPipeConnectionError(bool) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#18 0x00007fa051d84e46 in mojo::Connector::HandleError(bool, bool) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#19 0x00007fa051da1f90 in mojo::SimpleWatcher::OnHandleReady(int, unsigned int, mojo::HandleSignalsState const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#20 0x00007fa051da2265 in mojo::SimpleWatcher::Context::CallNotify(MojoTrapEvent const*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#21 0x00007fa0502a8bc3 in mojo::core::WatcherDispatcher::InvokeWatchCallback(unsigned long, unsigned int, mojo::core::HandleSignalsState const&, unsigned int) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#22 0x00007fa0502a84cf in mojo::core::Watch::InvokeCallback(unsigned int, mojo::core::HandleSignalsState const&, unsigned int) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#23 0x00007fa0502a51da in mojo::core::RequestContext::~RequestContext() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#24 0x00007fa05029c138 in mojo::core::NodeChannel::OnChannelError(mojo::core::Channel::Error) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#25 0x00007fa0502b00ae in mojo::core::(anonymous namespace)::ChannelPosix::OnFileCanReadWithoutBlocking(int) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#26 0x00007fa051a7f0a8 in base::MessagePumpLibevent::OnLibeventNotification(int, short, void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#27 0x00007fa04a1ec8f8 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#28 0x00007fa04a1ed33f in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#29 0x00007fa051a7ca79 in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#30 0x00007fa051a08aa6 in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#31 0x00007fa050f6cb84 in content::BrowserProcessSubThread::IOThreadRun(base::RunLoop*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#32 0x00007fa051a410c8 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#33 0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#34 0x00007fa04d7496db in start_thread (arg=0x7fa011ffb700) at pthread_create.c:463
#35 0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fa0137fe700 (LWP 20208)):
#0  0x00007fa05805503f in __GI___select (nfds=32, readfds=0x7fa0137fd960, writefds=0x0, exceptfds=0x0, timeout=0x0) at ../sysdeps/unix/sysv/linux/select.c:41
#1  0x00007fa0519ce004 in base::(anonymous namespace)::InotifyReaderThreadDelegate::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fa04d7496db in start_thread (arg=0x7fa0137fe700) at pthread_create.c:463
#4  0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fa013fff700 (LWP 20207)):
#0  0x00007fa05805fbb7 in epoll_wait (epfd=25, events=0x7fa000002010, maxevents=32, timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fa04a1f72c5 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2  0x00007fa04a1ed114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fa051a7cacd in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa051a08aa6 in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fa051a40f59 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fa04d7496db in start_thread (arg=0x7fa013fff700) at pthread_create.c:463
#8  0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fa018d68700 (LWP 20206)):
#0  0x00007fa0580226c2 in __GI___waitpid (pid=20203, stat_loc=0x7fa018d677ec, options=0) at ../sysdeps/unix/sysv/linux/waitpid.c:30
#1  0x00007fa051a74ab6 in (anonymous namespace)::WaitForExitWithTimeoutImpl(int, int*, base::TimeDelta) [clone .constprop.45] () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fa051a750d4 in base::Process::WaitForExitWithTimeout(base::TimeDelta, int*) const () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fa051a721ff in base::(anonymous namespace)::BackgroundReaper::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fa04d7496db in start_thread (arg=0x7fa018d68700) at pthread_create.c:463
#6  0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fa019569700 (LWP 20201)):
#0  0x00007fa058052bf9 in __GI___poll (fds=0x7fa0195687d0, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa051323682 in content::SandboxIPCHandler::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fa051a4671f in base::SimpleThread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa04d7496db in start_thread (arg=0x7fa019569700) at pthread_create.c:463
#5  0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fa01af3a700 (LWP 20200)):
#0  0x00007fa04d74fed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fa01af396f0, expected=0, futex_word=0x7fa01af398c8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fa01af39790, mutex=0x7fa01af39878, cond=0x7fa01af398a0) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fa01af398a0, mutex=0x7fa01af39878, abstime=0x7fa01af39790) at pthread_cond_wait.c:667
#3  0x00007fa051a76146 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa051a76aed in base::WaitableEvent::TimedWaitUntil(base::TimeTicks const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fa051a76c82 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fa051a2f7a1 in base::internal::SchedulerWorker::Delegate::WaitForWork(base::WaitableEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fa051a32a7a in base::internal::SchedulerWorker::RunWorker() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fa051a32fd4 in base::internal::SchedulerWorker::RunPooledWorker() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fa04d7496db in start_thread (arg=0x7fa01af3a700) at pthread_create.c:463
#11 0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fa021543700 (LWP 20199)):
#0  0x00007fa04d74fed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fa0215426f0, expected=0, futex_word=0x7fa0215428c8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fa021542790, mutex=0x7fa021542878, cond=0x7fa0215428a0) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fa0215428a0, mutex=0x7fa021542878, abstime=0x7fa021542790) at pthread_cond_wait.c:667
#3  0x00007fa051a76146 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa051a76aed in base::WaitableEvent::TimedWaitUntil(base::TimeTicks const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fa051a76c82 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fa051a2f7a1 in base::internal::SchedulerWorker::Delegate::WaitForWork(base::WaitableEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fa051a32a7a in base::internal::SchedulerWorker::RunWorker() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fa051a32fd4 in base::internal::SchedulerWorker::RunPooledWorker() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fa04d7496db in start_thread (arg=0x7fa021543700) at pthread_create.c:463
#11 0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fa021d44700 (LWP 20198)):
#0  0x00007fa05805fbb7 in epoll_wait (epfd=9, events=0x7fa00c002000, maxevents=32, timeout=25241) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fa04a1f72c5 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2  0x00007fa04a1ed114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fa051a7cbaa in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa051a08aa6 in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fa051a38b54 in base::internal::ServiceThread::Run(base::RunLoop*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fa051a410c8 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fa051a78b2a in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fa04d7496db in start_thread (arg=0x7fa021d44700) at pthread_create.c:463
#9  0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fa023679700 (LWP 20197)):
#0  0x00007fa058052bf9 in __GI___poll (fds=0x7fa01c003ce0, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa04bfd85c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa04bfd86dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa0589a5aaf in QEventDispatcherGlib::processEvents (this=0x7fa01c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#4  0x00007fa058945f9a in QEventLoop::exec (this=this@entry=0x7fa0236789b0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007fa0587613aa in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007fa056b3f0e5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fa058762b52 in QThreadPrivate::start (arg=0x7fa056db6d80) at thread/qthread_unix.cpp:360
#8  0x00007fa04d7496db in start_thread (arg=0x7fa023679700) at pthread_create.c:463
#9  0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fa02ae45700 (LWP 20196)):
#0  0x00007fa04d74f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559103fc9898) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x559103fc9848, cond=0x559103fc9870) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x559103fc9870, mutex=0x559103fc9848) at pthread_cond_wait.c:655
#3  0x00007fa02c4e2ebb in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fa02c4e2ab7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fa04d7496db in start_thread (arg=0x7fa02ae45700) at pthread_create.c:463
#6  0x00007fa05805f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fa059e2e0c0 (LWP 20195)):
#0  0x00007fa04d74ad2d in __GI___pthread_timedjoin_ex (threadid=140325473466112, thread_return=0x0, abstime=0x0, block=<optimized out>) at pthread_join_common.c:89
#1  0x00007fa051a78d30 in base::PlatformThread::Join(base::PlatformThreadHandle) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fa051a4158e in base::Thread::Stop() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fa050f6c389 in content::BrowserProcessSubThread::~BrowserProcessSubThread() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fa050f6c3e1 in content::BrowserProcessSubThread::~BrowserProcessSubThread() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fa050f5fe27 in content::(anonymous namespace)::ResetThread_IO(std::unique_ptr<content::BrowserProcessSubThread, std::default_delete<content::BrowserProcessSubThread> >) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fa050f62056 in content::BrowserMainLoop::ShutdownThreadsAndCleanUp() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fa050f66503 in content::BrowserMainRunnerImpl::Shutdown() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fa050f66785 in content::BrowserMainRunnerImpl::~BrowserMainRunnerImpl() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fa050f667a1 in content::BrowserMainRunnerImpl::~BrowserMainRunnerImpl() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fa04f73c19d in QtWebEngineCore::WebEngineContext::destroy() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fa04f73c215 in QtWebEngineCore::WebEngineContext::destroyContextPostRoutine() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fa05894a1a2 in qt_call_post_routines () at kernel/qcoreapplication.cpp:352
#13 0x00007fa058f63576 in QApplication::~QApplication (this=0x7fff356baa60, __in_chrg=<optimized out>) at kernel/qapplication.cpp:778
#14 0x0000559101d134c5 in main (argc=<optimized out>, argv=0x7fff356bac68) at ./src/main/main.cpp:148

Reported using DrKonqi
Comment 1 andrew brewster 2020-04-21 23:31:28 UTC 
Created attachment 127764 [details]
KCrash trace from Falkon crash on exit

KCrash trace
Comment 2 andrew brewster 2020-04-21 23:35:43 UTC 
Open Falkon from the console - see console messages below, probably a separate matter. Falkon crashed on exit (File > Quit) after opening with ablank home page and not navigating to any URL; see attached KCrash trace

falkon
QWebEngineUrlScheme::registerScheme: Too late to register scheme "falkon"
QWebEngineUrlScheme::registerScheme: Too late to register scheme "extension"
Please register the custom scheme 'falkon' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'extension' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Cannot initialize model with data QJsonObject() . missing: QJsonValue(string, "urls")
Please register the custom scheme 'trash' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'vnc' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'tags' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'metainfo' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'svn+http' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'webdavs' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'programs' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'xz' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'thumbnail' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'svn+https' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'svn' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'bluetooth' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'settings' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'pnm' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'tar' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'mms' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'rdp' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'filenamesearch' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'ksvn+http' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'ldap' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'fonts' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'sieve' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'zip' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'obexftp' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'rtsp' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'ksvn+file' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'ksvn+ssh' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'rkward' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'clementine-zune' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'pop3s' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'lzma' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'desktop' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'info' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'perldoc' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'remote' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'bzip2' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'audiocd' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'ksvn+https' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'ghelp' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'network' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'mmsu' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'camera' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'pop3' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'applications' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'fish' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'bzip' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'bookmarks' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'videodvd' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'webdav' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'ksvn' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'gzip' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'ms-its' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'nfs' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'activities' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'help' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'zeroconf' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'rtspt' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'xmpp' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'man' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'aim' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'rtspu' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'clementine-feed' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'feed' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'sftp' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'recentdocuments' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'webcal' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'gdrive' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'ar' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'clementine-itms' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'kdeconnect' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'svn+file' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'timeline' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'akonadi' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'clementine-itpc' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'ldaps' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'mmst' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'adiumxtra' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'smb' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'svn+ssh' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'mtp' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Please register the custom scheme 'baloosearch' via QWebEngineUrlScheme::registerScheme() before installing the custom scheme handler.
Falkon: 6 extensions loaded
KCrash: Application 'falkon' crashing...
KCrash: Attempting to start /usr/libexec/drkonqi from kdeinit

[1]+  Stopped                 falkon
Comment 3 Justin Zobel 2020-10-25 06:40:38 UTC 
I cannot reproduce this at all on 3.1.0.

Can you please retest on any up to date system and let us know your results.
Comment 4 Bug Janitor Service 2020-11-09 04:33:56 UTC 
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!
Comment 5 Bug Janitor Service 2020-11-24 04:34:18 UTC 
This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!