Application: kwin_x11 (5.14.0)

Qt Version: 5.11.1
Frameworks Version: 5.50.0
Operating System: Linux 4.15.0-43-generic x86_64
Distribution: KDE neon User Edition 5.14

-- Information about the crash:
- What I was doing when the application crashed: The machine was finishing the booting proces; I therefore was doing nothing but waiting for that to happen.

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f031578b940 (LWP 1734))]

Thread 4 (Thread 0x7f02e5bdb700 (LWP 1837)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f031147dde4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f031147de29 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f030e1e16ba in start_thread (arg=0x7f02e5bdb700) at pthread_create.c:333
#4  0x00007f03151ab41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f02f14f7700 (LWP 1831)):
#0  0x00007f031519f811 in __GI_ppoll (fds=fds@entry=0x7f02e0000ac8, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:50
#1  0x00007f031254fb21 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=0x7f02e0000ac8) at kernel/qcore_unix.cpp:112
#3  qt_safe_poll (fds=0x7f02e0000ac8, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:133
#4  0x00007f03125511b2 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:500
#5  0x00007f03124fb5ba in QEventLoop::exec (this=this@entry=0x7f02f14f6c50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#6  0x00007f03123305e4 in QThread::exec (this=this@entry=0x1377fa0) at thread/qthread.cpp:525
#7  0x00007f030ce7e195 in QQmlThreadPrivate::run (this=0x1377fa0) at qml/ftw/qqmlthread.cpp:148
#8  0x00007f031233b727 in QThreadPrivate::start (arg=0x1377fa0) at thread/qthread_unix.cpp:367
#9  0x00007f030e1e16ba in start_thread (arg=0x7f02f14f7700) at pthread_create.c:333
#10 0x00007f03151ab41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f02f91cf700 (LWP 1780)):
#0  0x00007f031519f811 in __GI_ppoll (fds=fds@entry=0x7f02ec010548, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:50
#1  0x00007f031254fb21 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=0x7f02ec010548) at kernel/qcore_unix.cpp:112
#3  qt_safe_poll (fds=0x7f02ec010548, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:133
#4  0x00007f03125511b2 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:500
#5  0x00007f03124fb5ba in QEventLoop::exec (this=this@entry=0x7f02f91cec40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#6  0x00007f03123305e4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#7  0x00007f030bd7ef35 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f031233b727 in QThreadPrivate::start (arg=0x7f030bff7d60) at thread/qthread_unix.cpp:367
#9  0x00007f030e1e16ba in start_thread (arg=0x7f02f91cf700) at pthread_create.c:333
#10 0x00007f03151ab41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f031578b940 (LWP 1734)):
[KCrash Handler]
#6  QMetaObject::invokeMethod (obj=0x7fffb23d6580, member=0x0, member@entry=0x7f0311cfebff "addRepaintFull", type=type@entry=Qt::AutoConnection, ret=..., val0=..., val1=..., val2=..., val3=..., val4=..., val5=..., val6=..., val7=..., val8=..., val9=...) at kernel/qmetaobject.cpp:1474
#7  0x00007f0311ceb517 in QMetaObject::invokeMethod (val9=..., val8=..., val7=..., val6=..., val5=..., val4=..., val3=..., val2=..., val1=..., val0=..., member=0x7f0311cfebff "addRepaintFull", obj=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs.h:461
#8  KWin::EffectWindow::addRepaintFull (this=this@entry=0x1d31470) at /workspace/build/libkwineffects/kwineffects.cpp:945
#9  0x00007f0311a2131e in KWin::DimInactiveEffect::postPaintScreen (this=0x1b513d0) at /workspace/build/effects/diminactive/diminactive.cpp:157
#10 0x00007f0314d29181 in KWin::EffectsHandlerImpl::postPaintScreen (this=0x1a11ca0) at /workspace/build/effects.cpp:401
#11 0x00007f0314d29181 in KWin::EffectsHandlerImpl::postPaintScreen (this=0x1a11ca0) at /workspace/build/effects.cpp:401
#12 0x00007f0314d1c1ca in KWin::Scene::paintScreen (this=this@entry=0x15b1e90, mask=mask@entry=0x7fffb23d6a70, damage=..., repaint=..., updateRegion=updateRegion@entry=0x7fffb23d6a40, validRegion=validRegion@entry=0x7fffb23d6a50, projection=..., outputGeometry=...) at /workspace/build/scene.cpp:155
#13 0x00007f02f00a5e2f in KWin::SceneOpenGL::paint (this=0x15b1e90, damage=..., toplevels=...) at /workspace/build/plugins/scenes/opengl/scene_opengl.cpp:702
#14 0x00007f0314d0dc0e in KWin::Compositor::performCompositing (this=0x12c0d20) at /workspace/build/composite.cpp:745
#15 0x00007f031252af73 in QObject::event (this=0x12c0d20, e=<optimized out>) at kernel/qobject.cpp:1273
#16 0x00007f03132ca39c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x12c0d20, e=0x7fffb23d6eb0) at kernel/qapplication.cpp:3727
#17 0x00007f03132d1ab0 in QApplication::notify (this=0x7fffb23d71a0, receiver=0x12c0d20, e=0x7fffb23d6eb0) at kernel/qapplication.cpp:3486
#18 0x00007f03124fd228 in QCoreApplication::notifyInternal2 (receiver=0x12c0d20, event=event@entry=0x7fffb23d6eb0) at kernel/qcoreapplication.cpp:1048
#19 0x00007f031255347e in QCoreApplication::sendEvent (event=0x7fffb23d6eb0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#20 QTimerInfoList::activateTimers (this=this@entry=0x11f4a00) at kernel/qtimerinfo_unix.cpp:643
#21 0x00007f03125506bc in QEventDispatcherUNIXPrivate::activateTimers (this=this@entry=0x11f4960) at kernel/qeventdispatcher_unix.cpp:249
#22 0x00007f0312551422 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=..., flags@entry=...) at kernel/qeventdispatcher_unix.cpp:514
#23 0x00007f02fc3fecad in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at qunixeventdispatcher.cpp:68
#24 0x00007f03124fb5ba in QEventLoop::exec (this=this@entry=0x7fffb23d7080, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#25 0x00007f03125046c4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1336
#26 0x00007f0312ab5f8c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1762
#27 0x00007f03132ca2f5 in QApplication::exec () at kernel/qapplication.cpp:2901
#28 0x00007f03154771f9 in kdemain (argc=1, argv=0x7fffb23d7338) at /workspace/build/main_x11.cpp:468
#29 0x00007f03150c4830 in __libc_start_main (main=0x4006b0 <main(int, char**)>, argc=3, argv=0x7fffb23d7338, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffb23d7328) at ../csu/libc-start.c:291
#30 0x00000000004006e9 in _start ()

Possible duplicates by query: bug 400721.

Reported using DrKonqi