Application: krunner (5.7.4)

Qt Version: 5.6.1
Frameworks Version: 5.25.0
Operating System: Linux 4.8.0-rc7+ x86_64
Distribution: Debian GNU/Linux unstable (sid)

-- Information about the crash:
I put machine into single user mode and returned to multi-user mode and started plasma desktop, then used alt-F2 to attempt to start iceweasel but krunner crashed without starting iceweasel.

The crash can be reproduced sometimes.

-- Backtrace:
Application: krunner (krunner), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
[Current thread is 1 (Thread 0x7fe11c48d7c0 (LWP 31588))]

Thread 13 (Thread 0x7fe0f9ffb700 (LWP 31784)):
#0  0x0000003000c0d18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000003011caec3b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x0000003105e13da0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x0000003105e17fc8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x0000003105e12f1d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x0000003105e18022 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x0000003105e12f1d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x0000003105e15de9 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003000c07464 in start_thread (arg=0x7fe0f9ffb700) at pthread_create.c:333
#10 0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 12 (Thread 0x7fe0fa7fc700 (LWP 31783)):
#0  0x0000003000c0d18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000003011caec3b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x0000003105e13da0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x0000003105e17fc8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x0000003105e12f1d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x0000003105e18022 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x0000003105e12f1d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x0000003105e15de9 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003000c07464 in start_thread (arg=0x7fe0fa7fc700) at pthread_create.c:333
#10 0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 11 (Thread 0x7fe0faffd700 (LWP 31782)):
#0  0x0000003000c0d18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000003011caec3b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x0000003105e13da0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x0000003105e17fc8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x0000003105e12f1d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x0000003105e18022 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x0000003105e12f1d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x0000003105e15de9 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003000c07464 in start_thread (arg=0x7fe0faffd700) at pthread_create.c:333
#10 0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 10 (Thread 0x7fe0fb7fe700 (LWP 31781)):
[KCrash Handler]
#6  0x00000030d5c0392a in  () at /usr/lib/x86_64-linux-gnu/liblmdb.so.0
#7  0x00000030d5c04d34 in mdb_txn_begin () at /usr/lib/x86_64-linux-gnu/liblmdb.so.0
#8  0x00000030c9424c20 in  () at /usr/lib/x86_64-linux-gnu/libKF5Baloo.so.5
#9  0x00000030c941335f in Baloo::Query::exec() () at /usr/lib/x86_64-linux-gnu/libKF5Baloo.so.5
#10 0x00007fe10274b6b0 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/krunner_baloosearchrunner.so
#11 0x00007fe10274c489 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/krunner_baloosearchrunner.so
#12 0x00007fe10a5a4f48 in Plasma::AbstractRunner::performMatch(Plasma::RunnerContext&) () at /usr/lib/x86_64-linux-gnu/libKF5Runner.so.5
#13 0x0000003105e17748 in ThreadWeaver::Executor::run(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#14 0x0000003105e16190 in ThreadWeaver::Job::execute(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#15 0x0000003105e15d30 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#16 0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x0000003000c07464 in start_thread (arg=0x7fe0fb7fe700) at pthread_create.c:333
#18 0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 9 (Thread 0x7fe100f18700 (LWP 31780)):
#0  0x0000003000c0d18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000003011caec3b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x0000003105e13da0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x0000003105e17fc8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x0000003105e12f1d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x0000003105e18022 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x0000003105e12f1d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x0000003105e15de9 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003000c07464 in start_thread (arg=0x7fe100f18700) at pthread_create.c:333
#10 0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 8 (Thread 0x7fe101719700 (LWP 31779)):
#0  0x0000003000c0d18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000003011caec3b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x0000003105e13da0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x0000003105e17fc8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x0000003105e12f1d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x0000003105e18022 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x0000003105e12f1d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x0000003105e15de9 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003000c07464 in start_thread (arg=0x7fe101719700) at pthread_create.c:333
#10 0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 7 (Thread 0x7fe0fbfff700 (LWP 31778)):
#0  0x0000003000c0d18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000003011caec3b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x0000003105e13da0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x0000003105e17fc8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x0000003105e12f1d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x0000003105e18022 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x0000003105e12f1d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x0000003105e15de9 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003000c07464 in start_thread (arg=0x7fe0fbfff700) at pthread_create.c:333
#10 0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 6 (Thread 0x7fe101f1a700 (LWP 31777)):
#0  0x0000003000c0d18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000003011caec3b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x0000003105e13da0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x0000003105e17fc8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x0000003105e12f1d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x0000003105e18022 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x0000003105e12f1d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x0000003105e15de9 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003000c07464 in start_thread (arg=0x7fe101f1a700) at pthread_create.c:333
#10 0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 5 (Thread 0x7fe10bfff700 (LWP 31596)):
#0  0x00000030004df50d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x0000003003c4a9d6 in g_main_context_iterate (priority=<optimized out>, n_fds=1, fds=0x7fe104002e70, timeout=<optimized out>, context=0x7fe104000990) at ././glib/gmain.c:4226
#2  0x0000003003c4a9d6 in g_main_context_iterate (context=context@entry=0x7fe104000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3922
#3  0x0000003003c4aaec in g_main_context_iteration (context=0x7fe104000990, may_block=1) at ././glib/gmain.c:3988
#4  0x0000003011edb51b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x0000003011e8319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x0000003011ca8e53 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x000000303bcc8a55 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003000c07464 in start_thread (arg=0x7fe10bfff700) at pthread_create.c:333
#10 0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 4 (Thread 0x7fe1188ad700 (LWP 31595)):
#0  0x0000003000c0d18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fe119597493 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007fe119596bd7 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x0000003000c07464 in start_thread (arg=0x7fe1188ad700) at pthread_create.c:333
#4  0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7fe11b175700 (LWP 31590)):
#0  0x00000030004db57d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x0000003003c8ec60 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7fe11b174bb0, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x0000003003c8ec60 in g_wakeup_acknowledge (wakeup=0x7fe1140015b0) at ././glib/gwakeup.c:210
#3  0x0000003003c4a485 in g_main_context_check (context=context@entry=0x7fe10c000990, max_priority=2147483647, fds=fds@entry=0x7fe10c010d50, n_fds=n_fds@entry=1) at ././glib/gmain.c:3705
#4  0x0000003003c4a974 in g_main_context_iterate (context=context@entry=0x7fe10c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#5  0x0000003003c4aaec in g_main_context_iteration (context=0x7fe10c000990, may_block=1) at ././glib/gmain.c:3988
#6  0x0000003011edb51b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x0000003011e8319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x0000003011ca8e53 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003014c15525 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#10 0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x0000003000c07464 in start_thread (arg=0x7fe11b175700) at pthread_create.c:333
#12 0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7fe11bba8700 (LWP 31589)):
#0  0x00000030004df50d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x000000300340a340 in _xcb_conn_wait (__timeout=-1, __nfds=1, __fds=0x7fe11bba7d00) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x000000300340a340 in _xcb_conn_wait (c=c@entry=0x1518560, cond=cond@entry=0x15185a0, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:459
#3  0x000000300340bf39 in xcb_wait_for_event (c=0x1518560) at ../../src/xcb_in.c:693
#4  0x00007fe11c20aa79 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#5  0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x0000003000c07464 in start_thread (arg=0x7fe11bba8700) at pthread_create.c:333
#7  0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7fe11c48d7c0 (LWP 31588)):
#0  0x0000003000c0d18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x000000300340a5b7 in _xcb_conn_wait (c=c@entry=0x1518560, cond=cond@entry=0x7fff60fca200, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:427
#2  0x000000300340bc5f in wait_for_reply (c=c@entry=0x1518560, request=924, e=e@entry=0x0) at ../../src/xcb_in.c:516
#3  0x000000300340bd72 in xcb_wait_for_reply (c=0x1518560, request=924, e=0x0) at ../../src/xcb_in.c:546
#4  0x00007fe11c20942e in QXcbConnection::internAtom(char const*) () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#5  0x00007fe11c20544b in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#6  0x00007fe11c205b2f in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#7  0x00007fe11c2075f8 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#8  0x0000003013f118db in QInternalMimeData::formats() const () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#9  0x00007fe11c2072e5 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#10 0x0000003013f117f6 in QInternalMimeData::hasFormat(QString const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#11 0x0000003011eac0e6 in QMimeData::hasText() const () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x000000303c9ea4e8 in QQuickTextInput::q_canPasteChanged() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x000000303cade05c in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x0000003011eb2bd9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x0000003013f0db69 in QClipboard::emitChanged(QClipboard::Mode) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#16 0x00007fe11c205d70 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#17 0x00007fe11c20c635 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#18 0x00007fe11c20d3eb in QXcbConnection::processXcbEvents() () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#19 0x0000003011eb3729 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x0000003014f5cbec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x0000003014f6208f in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x0000003011e85450 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x0000003011e873cc in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x0000003011edb0f3 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x0000003003c4a7d7 in g_main_context_dispatch (context=0x7fe1140016f0) at ././glib/gmain.c:3201
#26 0x0000003003c4a7d7 in g_main_context_dispatch (context=context@entry=0x7fe1140016f0) at ././glib/gmain.c:3854
#27 0x0000003003c4aa40 in g_main_context_iterate (context=context@entry=0x7fe1140016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3927
#28 0x0000003003c4aaec in g_main_context_iteration (context=0x7fe1140016f0, may_block=1) at ././glib/gmain.c:3988
#29 0x0000003011edb4ff in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x0000003011e8319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x0000003011e8b99c in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x0000000000406aeb in  ()
#33 0x00000030004202b1 in __libc_start_main (main=0x4066b0, argc=1, argv=0x7fff60fcb098, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff60fcb088) at ../csu/libc-start.c:291
#34 0x0000000000406b69 in _start ()

Reported using DrKonqi