Application: kmail (5.9.3)

Qt Version: 5.12.0
Frameworks Version: 5.52.0
Operating System: Linux 4.15.0-36-generic x86_64
Distribution: Ubuntu 18.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:
I called akonadictl restart

- Unusual behavior I noticed:
Akonadi had one of it is extremely regular breakdowns where it required a restart. In this case like it is most of the time, Kmail not able to show emails because akonadi was working, though it could show them perfectily fine if akonadi wasn't running at all.

-- Backtrace:
Application: KMail (kmail), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
__lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
[Current thread is 1 (Thread 0x7f2c6a9862c0 (LWP 24583))]

Thread 19 (Thread 0x7f2bcdfd3700 (LWP 24642)):
#0  0x00007f2c917d2bf9 in __GI___poll (fds=0x7f2bbc0049b0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f2c8589c439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2c8589c54c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2c9211bf5b in QEventDispatcherGlib::processEvents (this=0x7f2bbc000b20, flags=...) at /src/qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f2c920bc4fa in QEventLoop::exec (this=this@entry=0x7f2bcdfd2d20, flags=..., flags@entry=...) at /src/qt5/qtbase/src/corelib/kernel/qeventloop.cpp:225
#5  0x00007f2c91ee01aa in QThread::exec (this=<optimized out>) at /src/qt5/qtbase/src/corelib/thread/qthread.cpp:534
#6  0x00007f2c91ee1982 in QThreadPrivate::start (arg=0x55f56910f270) at /src/qt5/qtbase/src/corelib/thread/qthread_unix.cpp:361
#7  0x00007f2c874f16db in start_thread (arg=0x7f2bcdfd3700) at pthread_create.c:463
#8  0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f2bdbdf9700 (LWP 24634)):
#0  0x00007f2c917d2bf9 in __GI___poll (fds=0x7f2bc8006800, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f2c8589c439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2c8589c54c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2c9211bf5b in QEventDispatcherGlib::processEvents (this=0x7f2bd0000b20, flags=...) at /src/qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f2c920bc4fa in QEventLoop::exec (this=this@entry=0x7f2bdbdf8d20, flags=..., flags@entry=...) at /src/qt5/qtbase/src/corelib/kernel/qeventloop.cpp:225
#5  0x00007f2c91ee01aa in QThread::exec (this=<optimized out>) at /src/qt5/qtbase/src/corelib/thread/qthread.cpp:534
#6  0x00007f2c91ee1982 in QThreadPrivate::start (arg=0x55f5655c2a80) at /src/qt5/qtbase/src/corelib/thread/qthread_unix.cpp:361
#7  0x00007f2c874f16db in start_thread (arg=0x7f2bdbdf9700) at pthread_create.c:463
#8  0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f2be2222700 (LWP 24614)):
#0  0x00007f2c874f79f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f2be2221c58) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f2be2221c08, cond=0x7f2be2221c30) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f2be2221c30, mutex=0x7f2be2221c08) at pthread_cond_wait.c:655
#3  0x00007f2c7ce5aff9 in base::ConditionVariable::Wait () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/condition_variable_posix.cc:71
#4  0x00007f2c7ce5ba6c in base::WaitableEvent::TimedWaitUntil () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:223
#5  0x00007f2c7ce5baff in base::WaitableEvent::Wait () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:154
#6  0x00007f2c7ce164b5 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:35
#7  0x00007f2c7ce181b0 in base::internal::SchedulerWorker::RunWorker () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:324
#8  0x00007f2c7ce184c4 in base::internal::SchedulerWorker::RunDedicatedWorker () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:248
#9  0x00007f2c7ce5dda1 in ThreadFunc () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#10 0x00007f2c874f16db in start_thread (arg=0x7f2be2222700) at pthread_create.c:463
#11 0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f2c21ffb700 (LWP 24613)):
#0  0x00007f2c6f86da4c in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#1  0x00007f2c6f86e2cf in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#2  0x00007f2c754660d8 in pa_mainloop_dispatch () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f2c754664ae in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f2c75466530 in pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f2c75474399 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f2c6f87e2a8 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007f2c874f16db in start_thread (arg=0x7f2c21ffb700) at pthread_create.c:463
#8  0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f2c227fc700 (LWP 24612)):
#0  __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f2c917f0474 in ___fprintf_chk (fp=0x7f2c91aab8b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f2c7305c6a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f2c730449ad in event_logv_ () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f2c73044b44 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f2c7304646c in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f2c7303c114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f2c7ce5e821 in base::MessagePumpLibevent::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/message_loop/message_pump_libevent.cc:214
#7  0x00007f2c7cdf5e2b in base::RunLoop::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/run_loop.cc:102
#8  0x00007f2c7ce293b8 in base::Thread::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/thread.cc:255
#9  base::Thread::ThreadMain () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/thread.cc:337
#10 0x00007f2c7ce5dda1 in ThreadFunc () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#11 0x00007f2c874f16db in start_thread (arg=0x7f2c227fc700) at pthread_create.c:463
#12 0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f2c22ffd700 (LWP 24611)):
#0  0x00007f2c874f7ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f2c22ffca50, expected=0, futex_word=0x7f2c22ffcc38) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7f2c22ffcaf0, mutex=0x7f2c22ffcbe8, cond=0x7f2c22ffcc10) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7f2c22ffcc10, mutex=0x7f2c22ffcbe8, abstime=0x7f2c22ffcaf0) at pthread_cond_wait.c:667
#3  0x00007f2c7ce5b0c7 in base::ConditionVariable::TimedWait () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/condition_variable_posix.cc:120
#4  0x00007f2c7ce5ba57 in base::WaitableEvent::TimedWaitUntil () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:221
#5  0x00007f2c7cdccb18 in base::MessagePumpDefault::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/message_loop/message_pump_default.cc:63
#6  0x00007f2c7cdf5e2b in base::RunLoop::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/run_loop.cc:102
#7  0x00007f2c7ce293b8 in base::Thread::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/thread.cc:255
#8  base::Thread::ThreadMain () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/thread.cc:337
#9  0x00007f2c7ce5dda1 in ThreadFunc () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#10 0x00007f2c874f16db in start_thread (arg=0x7f2c22ffd700) at pthread_create.c:463
#11 0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f2c237fe700 (LWP 24610)):
#0  0x00007f2c874f7ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f2c237fda50, expected=0, futex_word=0x7f2c237fdc38) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7f2c237fdaf0, mutex=0x7f2c237fdbe8, cond=0x7f2c237fdc10) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7f2c237fdc10, mutex=0x7f2c237fdbe8, abstime=0x7f2c237fdaf0) at pthread_cond_wait.c:667
#3  0x00007f2c7ce5b0c7 in base::ConditionVariable::TimedWait () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/condition_variable_posix.cc:120
#4  0x00007f2c7ce5ba57 in base::WaitableEvent::TimedWaitUntil () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:221
#5  0x00007f2c7cdccb18 in base::MessagePumpDefault::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/message_loop/message_pump_default.cc:63
#6  0x00007f2c7cdf5e2b in base::RunLoop::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/run_loop.cc:102
#7  0x00007f2c7ce293b8 in base::Thread::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/thread.cc:255
#8  base::Thread::ThreadMain () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/thread.cc:337
#9  0x00007f2c7ce5dda1 in ThreadFunc () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#10 0x00007f2c874f16db in start_thread (arg=0x7f2c237fe700) at pthread_create.c:463
#11 0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f2c28ff9700 (LWP 24609)):
#0  0x00007f2c874f79f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f5652eccc8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55f5652ecc08, cond=0x55f5652ecca0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55f5652ecca0, mutex=0x55f5652ecc08) at pthread_cond_wait.c:655
#3  0x00007f2c7ce5aff9 in base::ConditionVariable::Wait () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/condition_variable_posix.cc:71
#4  0x00007f2c7da1eb58 in cc::SingleThreadTaskGraphRunner::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/cc/raster/single_thread_task_graph_runner.cc:123
#5  0x00007f2c7ce29595 in base::SimpleThread::ThreadMain () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/simple_thread.cc:81
#6  0x00007f2c7ce5dda1 in ThreadFunc () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#7  0x00007f2c874f16db in start_thread (arg=0x7f2c28ff9700) at pthread_create.c:463
#8  0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f2c297fa700 (LWP 24608)):
#0  0x00007f2c874f79f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f2c297f9c58) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f2c297f9c08, cond=0x7f2c297f9c30) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f2c297f9c30, mutex=0x7f2c297f9c08) at pthread_cond_wait.c:655
#3  0x00007f2c7ce5aff9 in base::ConditionVariable::Wait () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/condition_variable_posix.cc:71
#4  0x00007f2c7ce5ba6c in base::WaitableEvent::TimedWaitUntil () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:223
#5  0x00007f2c7ce5baff in base::WaitableEvent::Wait () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:154
#6  0x00007f2c7ce164b5 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:35
#7  0x00007f2c7ce181b0 in base::internal::SchedulerWorker::RunWorker () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:324
#8  0x00007f2c7ce18484 in base::internal::SchedulerWorker::RunSharedWorker () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:236
#9  0x00007f2c7ce5dda1 in ThreadFunc () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#10 0x00007f2c874f16db in start_thread (arg=0x7f2c297fa700) at pthread_create.c:463
#11 0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f2c29ffb700 (LWP 24607)):
#0  __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f2c917f0474 in ___fprintf_chk (fp=0x7f2c91aab8b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f2c7305c6a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f2c730449ad in event_logv_ () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f2c73044b44 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f2c7304646c in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f2c7303c114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f2c7ce5e964 in base::MessagePumpLibevent::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/message_loop/message_pump_libevent.cc:247
#7  0x00007f2c7cdf5e2b in base::RunLoop::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/run_loop.cc:102
#8  0x00007f2c7c7948a4 in content::BrowserProcessSubThread::IOThreadRun () at ../../../../../qtwebengine/src/3rdparty/chromium/content/browser/browser_process_sub_thread.cc:178
#9  0x00007f2c7ce29488 in base::Thread::ThreadMain () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/thread.cc:337
#10 0x00007f2c7ce5dda1 in ThreadFunc () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#11 0x00007f2c874f16db in start_thread (arg=0x7f2c29ffb700) at pthread_create.c:463
#12 0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f2c23fff700 (LWP 24604)):
#0  0x00007f2c874f7ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f2c23ffea60, expected=0, futex_word=0x7f2c23ffec48) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7f2c23ffeb00, mutex=0x7f2c23ffebf8, cond=0x7f2c23ffec20) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7f2c23ffec20, mutex=0x7f2c23ffebf8, abstime=0x7f2c23ffeb00) at pthread_cond_wait.c:667
#3  0x00007f2c7ce5b0c7 in base::ConditionVariable::TimedWait () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/condition_variable_posix.cc:120
#4  0x00007f2c7ce5ba57 in base::WaitableEvent::TimedWaitUntil () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:221
#5  0x00007f2c7ce5bb42 in base::WaitableEvent::TimedWait () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:161
#6  0x00007f2c7ce164e1 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:37
#7  0x00007f2c7ce181b0 in base::internal::SchedulerWorker::RunWorker () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:324
#8  0x00007f2c7ce18444 in base::internal::SchedulerWorker::RunPooledWorker () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:224
#9  0x00007f2c7ce5dda1 in ThreadFunc () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#10 0x00007f2c874f16db in start_thread (arg=0x7f2c23fff700) at pthread_create.c:463
#11 0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f2c2b7fe700 (LWP 24603)):
#0  0x00007f2c874f7ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f2c2b7fda60, expected=0, futex_word=0x7f2c2b7fdc48) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7f2c2b7fdb00, mutex=0x7f2c2b7fdbf8, cond=0x7f2c2b7fdc20) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7f2c2b7fdc20, mutex=0x7f2c2b7fdbf8, abstime=0x7f2c2b7fdb00) at pthread_cond_wait.c:667
#3  0x00007f2c7ce5b0c7 in base::ConditionVariable::TimedWait () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/condition_variable_posix.cc:120
#4  0x00007f2c7ce5ba57 in base::WaitableEvent::TimedWaitUntil () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:221
#5  0x00007f2c7ce5bb42 in base::WaitableEvent::TimedWait () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:161
#6  0x00007f2c7ce164e1 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:37
#7  0x00007f2c7ce181b0 in base::internal::SchedulerWorker::RunWorker () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:324
#8  0x00007f2c7ce18444 in base::internal::SchedulerWorker::RunPooledWorker () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:224
#9  0x00007f2c7ce5dda1 in ThreadFunc () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#10 0x00007f2c874f16db in start_thread (arg=0x7f2c2b7fe700) at pthread_create.c:463
#11 0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f2c2bfff700 (LWP 24602)):
#0  __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f2c917f0474 in ___fprintf_chk (fp=0x7f2c91aab8b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f2c7305c6a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f2c730449ad in event_logv_ () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f2c73044b44 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f2c7304646c in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f2c7303c114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f2c7ce5e964 in base::MessagePumpLibevent::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/message_loop/message_pump_libevent.cc:247
#7  0x00007f2c7cdf5e2b in base::RunLoop::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/run_loop.cc:102
#8  0x00007f2c7ce269d4 in base::internal::ServiceThread::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/task_scheduler/service_thread.cc:60
#9  0x00007f2c7ce29488 in base::Thread::ThreadMain () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/thread.cc:337
#10 0x00007f2c7ce5dda1 in ThreadFunc () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#11 0x00007f2c874f16db in start_thread (arg=0x7f2c2bfff700) at pthread_create.c:463
#12 0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f2c4159d700 (LWP 24600)):
#0  0x00007f2c917ce187 in __GI___libc_write (fd=2, buf=0x7f2c41599f90, nbytes=39) at ../sysdeps/unix/sysv/linux/write.c:27
#1  0x00007f2c917491bd in _IO_new_file_write (f=0x7f2c91aaa680 <_IO_2_1_stderr_>, data=0x7f2c41599f90, n=39) at fileops.c:1203
#2  0x00007f2c91749b2f in new_do_write (to_do=<optimized out>, data=0x7f2c41599f90 "[warn] epoll_wait: Bad file descriptor\n", fp=0x7f2c91aaa680 <_IO_2_1_stderr_>) at fileops.c:457
#3  _IO_new_file_xsputn (f=0x7f2c91aaa680 <_IO_2_1_stderr_>, data=<optimized out>, n=39) at fileops.c:1277
#4  0x00007f2c9171c707 in buffered_vfprintf (s=s@entry=0x7f2c91aaa680 <_IO_2_1_stderr_>, format=format@entry=0x7f2c7305c6a8 "[%s] %s\n", args=args@entry=0x7f2c4159c550) at vfprintf.c:2350
#5  0x00007f2c91719726 in _IO_vfprintf_internal (s=s@entry=0x7f2c91aaa680 <_IO_2_1_stderr_>, format=0x7f2c7305c6a8 "[%s] %s\n", ap=ap@entry=0x7f2c4159c550) at vfprintf.c:1301
#6  0x00007f2c917f04c6 in ___fprintf_chk (fp=0x7f2c91aaa680 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:35
#7  0x00007f2c730449ad in event_logv_ () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007f2c73044b44 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#9  0x00007f2c7304646c in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#10 0x00007f2c7303c114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#11 0x00007f2c7ce5e875 in base::MessagePumpLibevent::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/message_loop/message_pump_libevent.cc:237
#12 0x00007f2c7cdf5e2b in base::RunLoop::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/run_loop.cc:102
#13 0x00007f2c7ce293b8 in base::Thread::Run () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/thread.cc:255
#14 base::Thread::ThreadMain () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/thread.cc:337
#15 0x00007f2c7ce5dda1 in ThreadFunc () at ./../../../../../qtwebengine/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#16 0x00007f2c874f16db in start_thread (arg=0x7f2c4159d700) at pthread_create.c:463
#17 0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f2c4d960700 (LWP 24591)):
#0  0x00007f2c917d2bf9 in __GI___poll (fds=0x7f2c440049b0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f2c8589c439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2c8589c54c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2c9211bf5b in QEventDispatcherGlib::processEvents (this=0x7f2c44000b20, flags=...) at /src/qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f2c920bc4fa in QEventLoop::exec (this=this@entry=0x7f2c4d95fd20, flags=..., flags@entry=...) at /src/qt5/qtbase/src/corelib/kernel/qeventloop.cpp:225
#5  0x00007f2c91ee01aa in QThread::exec (this=<optimized out>) at /src/qt5/qtbase/src/corelib/thread/qthread.cpp:534
#6  0x00007f2c91ee1982 in QThreadPrivate::start (arg=0x55f56525c300) at /src/qt5/qtbase/src/corelib/thread/qthread_unix.cpp:361
#7  0x00007f2c874f16db in start_thread (arg=0x7f2c4d960700) at pthread_create.c:463
#8  0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f2c5d313700 (LWP 24588)):
#0  0x00007f2c917d2bf9 in __GI___poll (fds=0x7f2c480062f0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f2c8589c439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2c8589c54c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2c9211bf5b in QEventDispatcherGlib::processEvents (this=0x7f2c48000b20, flags=...) at /src/qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f2c920bc4fa in QEventLoop::exec (this=this@entry=0x7f2c5d312d20, flags=..., flags@entry=...) at /src/qt5/qtbase/src/corelib/kernel/qeventloop.cpp:225
#5  0x00007f2c91ee01aa in QThread::exec (this=<optimized out>) at /src/qt5/qtbase/src/corelib/thread/qthread.cpp:534
#6  0x00007f2c91ee1982 in QThreadPrivate::start (arg=0x55f564f909e0) at /src/qt5/qtbase/src/corelib/thread/qthread_unix.cpp:361
#7  0x00007f2c874f16db in start_thread (arg=0x7f2c5d313700) at pthread_create.c:463
#8  0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f2c5db14700 (LWP 24587)):
[KCrash Handler]
#6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007f2c916fe801 in __GI_abort () at abort.c:79
#8  0x00007f2c91b3b8b7 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#9  0x00007f2c91b41a06 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#10 0x00007f2c91b41a41 in std::terminate() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#11 0x00007f2c91ebd3eb in qTerminate () at /src/qt5/qtbase/src/corelib/global/qglobal.cpp:3190
#12 0x00007f2c91ee1b17 in QThreadPrivate::start (arg=0x55f564fc1f40) at /src/qt5/qtbase/src/corelib/thread/qthread_unix.cpp:373
#13 0x00007f2c874f16db in start_thread (arg=0x7f2c5db14700) at pthread_create.c:463
#14 0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f2c5e325700 (LWP 24586)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f2c91ee4104 in QtLinuxFutex::_q_futex (val3=0, addr2=0x0, val2=0, val=<optimized out>, op=0, addr=<optimized out>) at /src/qt5/qtbase/src/corelib/thread/qfutex_p.h:92
#2  QtLinuxFutex::futexWait<QBasicAtomicInteger<unsigned int> > (expectedValue=<optimized out>, futex=...) at /src/qt5/qtbase/src/corelib/thread/qfutex_p.h:107
#3  futexSemaphoreTryAcquire_loop<false> (timeout=-1, nn=8589934593, curValue=<optimized out>, u=...) at /src/qt5/qtbase/src/corelib/thread/qsemaphore.cpp:219
#4  futexSemaphoreTryAcquire<false> (timeout=-1, n=n@entry=1, u=...) at /src/qt5/qtbase/src/corelib/thread/qsemaphore.cpp:262
#5  QSemaphore::acquire (this=this@entry=0x7f2c5e3247a0, n=n@entry=1) at /src/qt5/qtbase/src/corelib/thread/qsemaphore.cpp:326
#6  0x00007f2c920eea90 in QMetaObject::activate (sender=sender@entry=0x7f2c58005230, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=5, argv=argv@entry=0x7f2c5e324830) at /src/qt5/qtbase/src/corelib/kernel/qobject.cpp:3752
#7  0x00007f2c920eeed7 in QMetaObject::activate (sender=sender@entry=0x7f2c58005230, m=m@entry=0x7f2c943cba60 <QDBusConnectionPrivate::staticMetaObject>, local_signal_index=local_signal_index@entry=5, argv=argv@entry=0x7f2c5e324830) at /src/qt5/qtbase/src/corelib/kernel/qobject.cpp:3640
#8  0x00007f2c943b0213 in QDBusConnectionPrivate::signalNeedsDisconnecting (this=this@entry=0x7f2c58005230, _t1=..., _t2=...) at .moc/moc_qdbusconnection_p.cpp:363
#9  0x00007f2c9435c184 in QDBusConnectionPrivate::disconnectRelay (this=this@entry=0x7f2c58005230, service=..., path=..., interface=..., receiver=receiver@entry=0x7f2c50045770, signal=...) at /src/qt5/qtbase/src/dbus/qdbusintegrator.cpp:2422
#10 0x00007f2c9436e47e in QDBusAbstractInterfacePrivate::finishDisconnectNotify (ptr=0x7f2c50045770, signalId=<optimized out>) at /src/qt5/qtbase/src/dbus/qdbusabstractinterface.cpp:667
#11 0x00007f2c920ef372 in QObject::event (this=0x7f2c50045770, e=<optimized out>) at /src/qt5/qtbase/src/corelib/kernel/qobject.cpp:1258
#12 0x00007f2c920be1e9 in doNotify (event=0x7f2c549589b0, receiver=0x7f2c50045770) at /src/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1151
#13 QCoreApplication::notify (event=<optimized out>, receiver=<optimized out>, this=<optimized out>) at /src/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1137
#14 QCoreApplication::notifyInternal2 (receiver=0x7f2c50045770, event=0x7f2c549589b0) at /src/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1061
#15 0x00007f2c920be3de in QCoreApplication::sendEvent (receiver=<optimized out>, event=event@entry=0x7f2c549589b0) at /src/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1451
#16 0x00007f2c920c0d77 in QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x55f564fd46e0) at /src/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1800
#17 0x00007f2c920c1328 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at /src/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1654
#18 0x00007f2c9211c913 in postEventSourceDispatch (s=0x7f2c500047a0) at /src/qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:276
#19 0x00007f2c8589c287 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f2c8589c4c0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f2c8589c54c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f2c9211bf5b in QEventDispatcherGlib::processEvents (this=0x7f2c50000b20, flags=...) at /src/qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:424
#23 0x00007f2c920bc4fa in QEventLoop::exec (this=this@entry=0x7f2c5e324d20, flags=..., flags@entry=...) at /src/qt5/qtbase/src/corelib/kernel/qeventloop.cpp:225
#24 0x00007f2c91ee01aa in QThread::exec (this=<optimized out>) at /src/qt5/qtbase/src/corelib/thread/qthread.cpp:534
#25 0x00007f2c91ee1982 in QThreadPrivate::start (arg=0x55f564f53a30) at /src/qt5/qtbase/src/corelib/thread/qthread_unix.cpp:361
#26 0x00007f2c874f16db in start_thread (arg=0x7f2c5e325700) at pthread_create.c:463
#27 0x00007f2c917df88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f2c6a9862c0 (LWP 24583)):
#0  __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f2c9173c83d in __GI__IO_fflush (fp=0x7f2c91aab8b0 <_IO_stdfile_2_lock>) at iofflush.c:39
#2  0x00007f2c91bc1f5e in std::ostream::flush() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#3  0x00007f2c91b52948 in std::ios_base::Init::~Init() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#4  0x00007f2c91701615 in __cxa_finalize (d=0x7f2c8324ce60) at cxa_finalize.c:83
#5  0x00007f2c82e60023 in __do_global_dtors_aux () from /opt/qt5/lib/libQt5Qml.so.5
#6  0x00007ffc7fc82700 in ?? ()
#7  0x00007f2c94230b73 in _dl_fini () at dl-fini.c:138
Backtrace stopped: frame did not save the PC

Reported using DrKonqi