https://bugs.kde.org/show_bug.cgi?id=403588

            Bug ID: 403588
           Summary: kwin crash in present effect
           Product: kwin
           Version: 5.14.4
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: kwin-bugs-n...@kde.org
          Reporter: mariusz.lib...@gmail.com
  Target Milestone: ---

Application: kwin_x11 (5.14.4)

Qt Version: 5.12.0
Frameworks Version: 5.54.0
Operating System: Linux 4.20.3-arch1-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

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

Initialized present effect by putting the mouse cursor in the hot corner.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f3441b63840 (LWP 1131))]

Thread 6 (Thread 0x7f342a65a700 (LWP 14894)):
#0  0x00007f344abdbd16 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f344976d46b in qt_safe_poll(pollfd*, unsigned long, timespec const*)
() at /usr/lib/libQt5Core.so.5
#2  0x00007f344976e94b in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#3  0x00007f344971a58c in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#4  0x00007f344955e5c9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f344955f9cc in  () at /usr/lib/libQt5Core.so.5
#6  0x00007f344832aa9d in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007f344abe6b23 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f3429e17700 (LWP 1286)):
#0  0x00007f3448330afc in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007f344903128c in  () at /usr/lib/libQt5Script.so.5
#2  0x00007f34490312a9 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007f344832aa9d in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f344abe6b23 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f342ae5b700 (LWP 1281)):
#0  0x00007f3448330afc in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007f342b3f7c24 in  () at /usr/lib/dri/i965_dri.so
#2  0x00007f342b3f2db0 in  () at /usr/lib/dri/i965_dri.so
#3  0xffffffffffffffff in  ()
#4  0xffffffffffffffff in  ()
#5  0xffffffffffffffff in  ()
#6  0xffffffffffffffff in  ()
#7  0xffffffffffffffff in  ()
#8  0xffffffffffffffff in  ()
#9  0xffffffffffffffff in  ()
#10 0xffffffffffffffff in  ()
#11 0xffffffffffffffff in  ()
#12 0xffffffffffffffff in  ()
#13 0xffffffffffffffff in  ()
#14 0xffffffffffffffff in  ()
#15 0xffffffffffffffff in  ()
#16 0xffffffffffffffff in  ()
#17 0x3a31785f6e69776b in  ()
#18 0x000030246b736964 in  ()
#19 0x00007ffce6ca1d2f in  ()
#20 0xa60a2af0ef9dfc00 in  ()
#21 0x0000000000000000 in  ()

Thread 3 (Thread 0x7f3439df6700 (LWP 1275)):
#0  0x00007f344abdbd16 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f344976d46b in qt_safe_poll(pollfd*, unsigned long, timespec const*)
() at /usr/lib/libQt5Core.so.5
#2  0x00007f344976e94b in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#3  0x00007f344971a58c in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#4  0x00007f344955e5c9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f3447aeab89 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f344955f9cc in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f344832aa9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f344abe6b23 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f343ba68700 (LWP 1221)):
#0  0x00007f344abdbd16 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f344976d46b in qt_safe_poll(pollfd*, unsigned long, timespec const*)
() at /usr/lib/libQt5Core.so.5
#2  0x00007f344976e94b in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#3  0x00007f344971a58c in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#4  0x00007f344955e5c9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f3447552ba6 in  () at /usr/lib/libQt5DBus.so.5
#6  0x00007f344955f9cc in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f344832aa9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f344abe6b23 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f3441b63840 (LWP 1131)):
[KCrash Handler]
#6  0x0000562357aa4a70 in  ()
#7  0x00007f344a8ec321 in KWin::Workspace::workspaceEvent(xcb_generic_event_t*)
() at /usr/lib/libkwin.so.5
#8  0x00007f34497193bf in
QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) ()
at /usr/lib/libQt5Core.so.5
#9  0x00007f3441475cc2 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*)
() at /usr/lib/libQt5XcbQpa.so.5
#10 0x00007f3441476a54 in
QXcbConnection::processXcbEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5XcbQpa.so.5
#11 0x00007f34414a1d5e in  () at /usr/lib/libQt5XcbQpa.so.5
#12 0x00007f344971a58c in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#13 0x00007f3449722896 in QCoreApplication::exec() () at
/usr/lib/libQt5Core.so.5
#14 0x00007f344acb88c9 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#15 0x00007f344ab0f223 in __libc_start_main () at /usr/lib/libc.so.6
#16 0x0000562354b5505e in _start ()
[Inferior 1 (process 1131) detached]

Reported using DrKonqi

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