Application: kwin_x11 (5.24.4)

Qt Version: 5.15.3
Frameworks Version: 5.92.0
Operating System: Linux 5.13.0-39-generic x86_64
Windowing System: X11
Distribution: KDE neon User - 5.24
DrKonqi: 5.24.4 [KCrashBackend]

-- Information about the crash:
- What I was doing when the application crashed:
trying to close firefox when system hang, make latte crashed sometime, but it restore now
- Custom settings of the application:

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault

[New LWP 1130]
[New LWP 1131]
[New LWP 1133]
[New LWP 1141]
[New LWP 1168]
[New LWP 1205]
[New LWP 1209]
[New LWP 3335]
[New LWP 3336]
[New LWP 3337]
[New LWP 3338]
[New LWP 3339]
[New LWP 3355]
[New LWP 3356]
[New LWP 10559]
[New LWP 10560]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f12c9a0a9cf in __GI___poll (fds=0x7ffdaccd3178, nfds=1, timeout=1000) at ../sysdeps/unix/sysv/linux/poll.c:29
__preamble__
[Current thread is 1 (Thread 0x7f12c50869c0 (LWP 1128))]

Thread 17 (Thread 0x7f127ffff700 (LWP 10560)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55617ed56a20) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55617ed569d0, cond=0x55617ed569f8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55617ed569f8, mutex=0x55617ed569d0) at pthread_cond_wait.c:638
#3  0x00007f12bdffb5eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f12bdffb1eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f129f5a3700 (LWP 10559)):
#0  0x00007f12c9a0aac6 in __ppoll (fds=fds@entry=0x7f1270013ac8, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1  0x00007f12caaf5559 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/poll2.h:77
#2  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f1270013ac8) at kernel/qcore_unix.cpp:132
#3  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f1270013ac8) at kernel/qcore_unix.cpp:129
#4  qt_safe_poll (fds=0x7f1270013ac8, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:155
#5  0x00007f12caaf6c03 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:211
#6  0x00007f12caa9d87b in QEventLoop::exec (this=this@entry=0x7f129f5a2bc0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#7  0x00007f12ca8b7442 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#8  0x00007f12cb99ab39 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f12ca8b8623 in QThreadPrivate::start (arg=0x55617dbb2930) at thread/qthread_unix.cpp:331
#10 0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#11 0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f126e262700 (LWP 3356)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55617e196aa4) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55617e196a50, cond=0x55617e196a78) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=cond@entry=0x55617e196a78, mutex=mutex@entry=0x55617e196a50) at pthread_cond_wait.c:638
#3  0x00007f12ca8be68b in QWaitConditionPrivate::wait (deadline=..., this=0x55617e196a50) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x55617e1968b0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007f12cbd16074 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f12cbd164e9 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f12ca8b8623 in QThreadPrivate::start (arg=0x55617e196810) at thread/qthread_unix.cpp:331
#8  0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f1276ce5700 (LWP 3355)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f1284cd0550) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7f1284cd0500, cond=0x7f1284cd0528) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7f1284cd0528, mutex=0x7f1284cd0500) at pthread_cond_wait.c:638
#3  0x00007f12bdffb5eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f12bdffb1eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f1285514700 (LWP 3339)):
#0  0x00007f12c9a0aac6 in __ppoll (fds=fds@entry=0x7f12680031c8, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1  0x00007f12caaf5559 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/poll2.h:77
#2  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f12680031c8) at kernel/qcore_unix.cpp:132
#3  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f12680031c8) at kernel/qcore_unix.cpp:129
#4  qt_safe_poll (fds=0x7f12680031c8, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:155
#5  0x00007f12caaf6c03 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:211
#6  0x00007f12caa9d87b in QEventLoop::exec (this=this@entry=0x7f1285513be0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#7  0x00007f12ca8b7442 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#8  0x00007f12ca8b8623 in QThreadPrivate::start (arg=0x55617df6c5e0) at thread/qthread_unix.cpp:331
#9  0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f129d322700 (LWP 3338)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55617d5b2670) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55617d5b2620, cond=0x55617d5b2648) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55617d5b2648, mutex=0x55617d5b2620) at pthread_cond_wait.c:638
#3  0x00007f12bdffb5eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f12bdffb1eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f129ed6e700 (LWP 3337)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55617e025468) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55617e025418, cond=0x55617e025440) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55617e025440, mutex=0x55617e025418) at pthread_cond_wait.c:638
#3  0x00007f12bdffb5eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f12bdffb1eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f12b54dc700 (LWP 3336)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55617d57f0c0) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55617d57f070, cond=0x55617d57f098) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55617d57f098, mutex=0x55617d57f070) at pthread_cond_wait.c:638
#3  0x00007f12bdffb5eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f12bdffb1eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f128607f700 (LWP 3335)):
#0  0x00007f12c9a0aac6 in __ppoll (fds=fds@entry=0x55617df704d8, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1  0x00007f12caaf5559 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/poll2.h:77
#2  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x55617df704d8) at kernel/qcore_unix.cpp:132
#3  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x55617df704d8) at kernel/qcore_unix.cpp:129
#4  qt_safe_poll (fds=0x55617df704d8, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:155
#5  0x00007f12caaf6c03 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:211
#6  0x00007f12caa9d87b in QEventLoop::exec (this=this@entry=0x7f128607ebe0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#7  0x00007f12ca8b7442 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#8  0x00007f12ca8b8623 in QThreadPrivate::start (arg=0x55617e1574c0) at thread/qthread_unix.cpp:331
#9  0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f129db6f700 (LWP 1209)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55617d518130) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55617d5180e0, cond=0x55617d518108) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55617d518108, mutex=0x55617d5180e0) at pthread_cond_wait.c:638
#3  0x00007f12bdffb5eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f12bdffb1eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f129e380700 (LWP 1205)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55617d31b828) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55617d31b7d8, cond=0x55617d31b800) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55617d31b800, mutex=0x55617d31b7d8) at pthread_cond_wait.c:638
#3  0x00007f12bdffb5eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f12bdffb1eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f12b483f700 (LWP 1168)):
#0  std::__atomic_base<int>::load (__m=std::memory_order_acquire, this=0x7f12a4000cfc) at /usr/include/c++/9/bits/atomic_base.h:413
#1  QAtomicOps<int>::loadAcquire<int> (_q_value=...) at ../../include/QtCore/../../src/corelib/thread/qatomic_cxx11.h:251
#2  QBasicAtomicInteger<int>::loadAcquire (this=0x7f12a4000cfc) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:110
#3  QEventLoop::exec (this=this@entry=0x7f12b483ebc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:231
#4  0x00007f12ca8b7442 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#5  0x00007f12cb99ab39 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007f12ca8b8623 in QThreadPrivate::start (arg=0x55617d3d60b0) at thread/qthread_unix.cpp:331
#7  0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#8  0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f12b67a9700 (LWP 1141)):
#0  0x00007f12c9a0aac6 in __ppoll (fds=fds@entry=0x7f12ac0074f8, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1  0x00007f12caaf5559 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/poll2.h:77
#2  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f12ac0074f8) at kernel/qcore_unix.cpp:132
#3  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f12ac0074f8) at kernel/qcore_unix.cpp:129
#4  qt_safe_poll (fds=0x7f12ac0074f8, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:155
#5  0x00007f12caaf6c03 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:211
#6  0x00007f12caa9d87b in QEventLoop::exec (this=this@entry=0x7f12b67a8bb0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#7  0x00007f12ca8b7442 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#8  0x00007f12ca60ef4b in ?? () from /lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007f12ca8b8623 in QThreadPrivate::start (arg=0x7f12ca692d80) at thread/qthread_unix.cpp:331
#10 0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#11 0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f12b7bd1700 (LWP 1133)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55617ce7cbd0) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55617ce7cb80, cond=0x55617ce7cba8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55617ce7cba8, mutex=0x55617ce7cb80) at pthread_cond_wait.c:638
#3  0x00007f12bdffb5eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f12bdffb1eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f12b8412700 (LWP 1131)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55617cf2dc18) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55617cf2dbc8, cond=0x55617cf2dbf0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55617cf2dbf0, mutex=0x55617cf2dbc8) at pthread_cond_wait.c:638
#3  0x00007f12bdffb5eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f12bdffb1eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f12c4969700 (LWP 1130)):
#0  0x00007f12c9a0a9cf in __GI___poll (fds=0x7f12c4968ae8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f12cb41fc1a in ?? () from /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f12cb42190a in xcb_wait_for_event () from /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f12c4c611a8 in QXcbEventQueue::run (this=0x55617cd87b90) at qxcbeventqueue.cpp:228
#4  0x00007f12ca8b8623 in QThreadPrivate::start (arg=0x55617cd87b90) at thread/qthread_unix.cpp:331
#5  0x00007f12ca69c609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f12c9a17163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f12c50869c0 (LWP 1128)):
[KCrash Handler]
#4  0x000055617e88aa40 in ?? ()
#5  0x00007f12cc627eaa in KWin::FocusChain::isUsableFocusCandidate (this=0x55617d319a80, c=0x55617e736a60, prev=0x55617e473160) at ./src/focuschain.cpp:206
#6  0x00007f12cc6282f7 in KWin::FocusChain::nextForDesktop (this=0x55617d319a80, reference=reference@entry=0x55617e473160, desktop=<optimized out>, desktop@entry=0x55617d3ba590) at ./src/focuschain.cpp:222
#7  0x00007f12cc5ccdf1 in KWin::Workspace::activateNextClient (this=0x55617d0eccc0, c=<optimized out>, c@entry=0x55617e473160) at ./src/focuschain.h:208
#8  0x00007f12cc5ccf49 in KWin::Workspace::clientHidden (this=<optimized out>, c=c@entry=0x55617e473160) at ./src/activation.cpp:412
#9  0x00007f12cc7373bb in KWin::X11Client::destroyClient (this=0x55617e473160) at ./src/workspace.h:811
#10 0x00007f12cc622d64 in KWin::X11Client::unmapNotifyEvent (e=0x7f12c00443c0, this=0x55617e473160) at ./src/events.cpp:552
#11 KWin::X11Client::unmapNotifyEvent (this=0x55617e473160, e=0x7f12c00443c0) at ./src/events.cpp:531
#12 0x00007f12cc62616b in KWin::X11Client::windowEvent (this=0x55617e473160, e=e@entry=0x7f12c00443c0) at ./src/events.cpp:394
#13 0x00007f12cc626548 in KWin::Workspace::workspaceEvent (this=0x55617d0eccc0, e=e@entry=0x7f12c00443c0) at ./src/events.cpp:167
#14 0x00007f12cc664e94 in KWin::Application::dispatchEvent (this=<optimized out>, event=0x7f12c00443c0) at ./src/workspace.h:811
#15 0x00007f12caa9c20f in QAbstractEventDispatcher::filterNativeEvent (this=<optimized out>, eventType=..., message=message@entry=0x7f12c00443c0, result=result@entry=0x7ffdaccd4308) at kernel/qabstracteventdispatcher.cpp:495
#16 0x00007f12c4c37ac5 in QXcbConnection::handleXcbEvent (this=this@entry=0x55617cd8e990, event=event@entry=0x7f12c00443c0) at qxcbnativeinterface.h:101
#17 0x00007f12c4c38816 in QXcbConnection::processXcbEvents (this=0x55617cd8e990, flags=...) at qxcbconnection.cpp:1020
#18 0x00007f12c4c62590 in QXcbUnixEventDispatcher::processEvents (this=0x55617ce49750, flags=...) at qxcbeventdispatcher.cpp:61
#19 0x00007f12caa9d87b in QEventLoop::exec (this=this@entry=0x7ffdaccd4450, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#20 0x00007f12caaa5a24 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#21 0x000055617b206c73 in main (argc=<optimized out>, argv=0x7ffdaccd46f8) at ./src/main_x11.cpp:482
[Inferior 1 (process 1128) detached]

Possible duplicates by query: bug 451693, bug 449762, bug 449101, bug 438315, bug 434372.

Reported using DrKonqi