Application: kwin_x11 (5.14.5)

Qt Version: 5.11.3
Frameworks Version: 5.54.0
Operating System: Linux 4.19.0-6-amd64 x86_64
Distribution: Debian GNU/Linux 10 (buster)

-- Information about the crash:
- What I was doing when the application crashed:
Moving window, resizing and other primitive manipulation
- Unusual behavior I noticed:
KWin and all related packages installed from Debian package Manager
- Custom settings of the application:
The app does not contain any additional or custom settings

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f60ce0e0940 (LWP 2567))]

Thread 5 (Thread 0x7f60b258e700 (LWP 2662)):
#0  0x00007f60d4a5e00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7f60d5459fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f60d4a5e00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f60d5459f68, cond=0x7f60d5459f90) at pthread_cond_wait.c:502
#2  0x00007f60d4a5e00c in __pthread_cond_wait (cond=0x7f60d5459f90, mutex=0x7f60d5459f68) at pthread_cond_wait.c:655
#3  0x00007f60d5363e6a in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f60d5363e89 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f60d4a57fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60d6e684cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f60b35ba700 (LWP 2648)):
#0  0x00007f60d4a5e00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55a7c7438058) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f60d4a5e00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55a7c7438008, cond=0x55a7c7438030) at pthread_cond_wait.c:502
#2  0x00007f60d4a5e00c in __pthread_cond_wait (cond=0x55a7c7438030, mutex=0x55a7c7438008) at pthread_cond_wait.c:655
#3  0x00007f60b380ae83 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f60b380abd7 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f60d4a57fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60d6e684cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f60c6369700 (LWP 2645)):
#0  0x00007f60d6e5d916 in __GI_ppoll (fds=0x7f60b4000d28, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f60d5a63721 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f60d5a64b99 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f60d5a1515b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f60d5864e76 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f60d4282c65 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007f60d586ea67 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f60d4a57fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f60d6e684cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f60cc80c700 (LWP 2601)):
#0  0x00007f60d6e5d916 in __GI_ppoll (fds=0x7f60c0012688, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f60d5a63721 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f60d5a64b99 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f60d5a1515b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f60d5864e76 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f60d3d4a545 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#6  0x00007f60d586ea67 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f60d4a57fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f60d6e684cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f60ce0e0940 (LWP 2567)):
[KCrash Handler]
#6  0x00007f60d6da67bb in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#7  0x00007f60d6d91535 in __GI_abort () at abort.c:79
#8  0x00007f60d6d9140f in __assert_fail_base (fmt=0x7f60c637f3cd "%s%s%s:%u: %s%s\320\237\321\200\320\276\320\262\320\265\321\200\320\276\321\207\320\275\320\276\320\265 \321\203\321\202\320\262\320\265\321\200\320\266\320\264\320\265\320\275\320\270\320\265 \302\253%s\302\273 \320\275\320\265 \320\262\321\213\320\277\320\276\320\273\320\275\320\265\320\275\320\276.\n%n", assertion=0x7f60d6cd1b4c "delete_refcount == 0", file=0x7f60d6cd1b98 "/build/kwin-oyrjvq/kwin-5.14.5/deleted.cpp", line=56, function=<optimized out>) at assert.c:92
#9  0x00007f60d6d9f102 in __GI___assert_fail (assertion=0x7f60d6cd1b4c "delete_refcount == 0", file=0x7f60d6cd1b98 "/build/kwin-oyrjvq/kwin-5.14.5/deleted.cpp", line=56, function=0x7f60d6cd1c40 "virtual KWin::Deleted::~Deleted()") at assert.c:101
#10 0x00007f60d6bec7e2 in KWin::Deleted::~Deleted() () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#11 0x00007f60d6bec959 in KWin::Deleted::~Deleted() () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#12 0x00007f60d5a40090 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f60d63934c1 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f60d639a970 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f60d5a16489 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f60d5a1946b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f60d5a64a0b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f60cdb7472d in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#19 0x00007f60d5a1515b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f60d5a1d132 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f60d6f3a47b in kdemain () at /usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#22 0x00007f60d6d9309b in __libc_start_main (main=0x55a7c7082050, argc=3, argv=0x7ffd0e6f49e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd0e6f49d8) at ../csu/libc-start.c:308
#23 0x000055a7c708208a in _start ()
[Inferior 1 (process 2567) detached]

Possible duplicates by query: bug 434359, bug 428149, bug 423964, bug 422433.

Reported using DrKonqi