Application: kwin_x11 (5.3.1)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-23-generic x86_64
Distribution: Ubuntu 15.04

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

Started to move window.  Left click on Title Bar and then moving window. Crash happend shortly after. Kwin crashes currently frequently, especially when moving windows between monitor screens.

System: kubuntu 15.04 with kde from ppa ppa:kubuntu-ppa/backports

-- 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 0x7ff5cd347800 (LWP 12690))]

Thread 5 (Thread 0x7ff5abd35700 (LWP 12697)):
#0  0x00007ff5cce2849d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ff5c3ef72f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ff5c3eb396c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ff5c3eb3e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ff5c3eb4242 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007ff5b416eaf6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007ff5c3eda955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007ff5cc6a96aa in start_thread (arg=0x7ff5abd35700) at pthread_create.c:333
#8  0x00007ff5cce37eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7ff5ab534700 (LWP 12701)):
#0  0x00007ff5c3ef8232 in g_private_get () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007ff5c3edae00 in g_thread_self () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ff5c3eb3fbd in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ff5c3eb4009 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ff5c3eda955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007ff5cc6a96aa in start_thread (arg=0x7ff5ab534700) at pthread_create.c:333
#6  0x00007ff5cce37eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7ff5aad33700 (LWP 12708)):
#0  0x00007ff5cce2e743 in select () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ff5cb41c101 in qt_safe_select (nfds=25, fdread=fdread@entry=0x7ff59c003ca8, fdwrite=fdwrite@entry=0x7ff59c003f38, fdexcept=fdexcept@entry=0x7ff59c0041c8, orig_timeout=orig_timeout@entry=0x0) at kernel/qcore_unix.cpp:75
#2  0x00007ff5cb41dcd2 in select (timeout=0x0, exceptfds=0x7ff59c0041c8, writefds=0x7ff59c003f38, readfds=0x7ff59c003ca8, nfds=<optimized out>, this=0x7ff59c001350) at kernel/qeventdispatcher_unix.cpp:320
#3  QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7ff59c003b10, flags=..., flags@entry=..., timeout=timeout@entry=0x0) at kernel/qeventdispatcher_unix.cpp:196
#4  0x00007ff5cb41e275 in QEventDispatcherUNIX::processEvents (this=0x7ff59c001350, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#5  0x00007ff5cb3c53e2 in QEventLoop::exec (this=this@entry=0x7ff5aad32da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007ff5cb184b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007ff5c4fe7f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007ff5cb189b0e in QThreadPrivate::start (arg=0x1e28fd0) at thread/qthread_unix.cpp:337
#9  0x00007ff5cc6a96aa in start_thread (arg=0x7ff5aad33700) at pthread_create.c:333
#10 0x00007ff5cce37eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7ff5912ec700 (LWP 12712)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ff5c9f8d644 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007ff5c9f8d689 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007ff5cc6a96aa in start_thread (arg=0x7ff5912ec700) at pthread_create.c:333
#4  0x00007ff5cce37eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7ff5cd347800 (LWP 12690)):
[KCrash Handler]
#6  QScreen::handle (this=0x0) at kernel/qscreen.cpp:85
#7  0x00007ff5b7184545 in QXcbWindow::QXcbWindow (this=0x34b3d40, window=0x1f7dd70) at qxcbwindow.cpp:260
#8  0x00007ff5b71715c1 in QXcbIntegration::createPlatformWindow (this=<optimized out>, window=0x1f7dd70) at qxcbintegration.cpp:194
#9  0x00007ff5cb719786 in QWindowPrivate::create (this=0x2edd920, recursive=recursive@entry=false) at kernel/qwindow.cpp:395
#10 0x00007ff5cb71997b in QWindow::create (this=this@entry=0x1f7dd70) at kernel/qwindow.cpp:539
#11 0x00007ff5cb71c678 in QWindow::setVisible (this=0x1f7dd70, visible=<optimized out>) at kernel/qwindow.cpp:475
#12 0x00007ff5ca324bee in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007ff5c4f5fb7f in QQmlPropertyPrivate::write(QObject*, QQmlPropertyData const&, QVariant const&, QQmlContextData*, QFlags<QQmlPropertyPrivate::WriteFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007ff5c4f615fb in QQmlPropertyPrivate::writeValueProperty(QObject*, QQmlPropertyData const&, QVariant const&, QQmlContextData*, QFlags<QQmlPropertyPrivate::WriteFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007ff5c4f61d31 in QQmlPropertyPrivate::writeBinding(QObject*, QQmlPropertyData const&, QQmlContextData*, QQmlJavaScriptExpression*, QV4::ValueRef, bool, QFlags<QQmlPropertyPrivate::WriteFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007ff5c4fd651c in QQmlBinding::update(QFlags<QQmlPropertyPrivate::WriteFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#17 0x00007ff5c4fd6c7e in QQmlBinding::expressionChanged(QQmlJavaScriptExpression*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#18 0x00007ff5c4fb0497 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#19 0x00007ff5c4f4d10c in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#20 0x00007ff5cb3f8141 in QMetaObject::activate (sender=sender@entry=0x1b2c950, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3603
#21 0x00007ff5cb3f9057 in QMetaObject::activate (sender=sender@entry=0x1b2c950, m=m@entry=0x7ff5ccd2b7e0 <KWin::Outline::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3582
#22 0x00007ff5cca8a680 in KWin::Outline::activeChanged (this=this@entry=0x1b2c950) at moc_outline.cpp:182
#23 0x00007ff5cc9682ad in KWin::Outline::show (this=0x1b2c950) at ../outline.cpp:57
#24 0x00007ff5cc9682f2 in KWin::Outline::show (this=<optimized out>, outlineGeometry=...) at ../outline.cpp:84
#25 0x00007ff5cc9a6a3a in KWin::Client::setElectricBorderMaximizing (this=this@entry=0x3490d00, maximizing=maximizing@entry=true) at ../geometry.cpp:3068
#26 0x00007ff5cc96a98d in KWin::Client::checkQuickTilingMaximizationZones (this=this@entry=0x3490d00, xroot=xroot@entry=1040, yroot=yroot@entry=5) at ../events.cpp:1364
#27 0x00007ff5cc96c939 in KWin::Client::motionNotifyEvent (this=0x3490d00, w=<optimized out>, state=<optimized out>, x=24, y=46, x_root=1040, y_root=5) at ../events.cpp:1413
#28 0x00007ff5cc96ca59 in KWin::Client::windowEvent (this=0x3490d00, e=0x7ff5b0001e40) at ../events.cpp:710
#29 0x00007ff5cc96dffa in KWin::Workspace::workspaceEvent (this=0x1d15a30, e=0x7ff5b0001e40) at ../events.cpp:371
#30 0x00007ff5cb3c4510 in QAbstractEventDispatcher::filterNativeEvent (this=this@entry=0x1b58a40, eventType=..., message=message@entry=0x7ff5b0001e40, result=result@entry=0x7ffe79037248) at kernel/qabstracteventdispatcher.cpp:460
#31 0x00007ff5b716f02d in QXcbConnection::handleXcbEvent (this=this@entry=0x1abed60, event=event@entry=0x7ff5b0001e40) at qxcbconnection.cpp:863
#32 0x00007ff5b71704bb in QXcbConnection::processXcbEvents (this=0x1abed60) at qxcbconnection.cpp:1303
#33 0x00007ff5cb3f973a in QObject::event (this=0x1abed60, e=<optimized out>) at kernel/qobject.cpp:1245
#34 0x00007ff5cbcd1b2c in QApplicationPrivate::notify_helper (this=0x1ab6830, receiver=0x1abed60, e=0x7ff5b0016300) at kernel/qapplication.cpp:3720
#35 0x00007ff5cbcd7000 in QApplication::notify (this=0x7ffe79037930, receiver=0x1abed60, e=0x7ff5b0016300) at kernel/qapplication.cpp:3503
#36 0x00007ff5cb3c7c2b in QCoreApplication::notifyInternal (this=0x7ffe79037930, receiver=0x1abed60, event=event@entry=0x7ff5b0016300) at kernel/qcoreapplication.cpp:935
#37 0x00007ff5cb3c9c9b in sendEvent (event=0x7ff5b0016300, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#38 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1aa72f0) at kernel/qcoreapplication.cpp:1552
#39 0x00007ff5cb41e112 in QEventDispatcherUNIX::processEvents (this=0x1b58a40, flags=flags@entry=...) at kernel/qeventdispatcher_unix.cpp:579
#40 0x00007ff5b71c696d in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:62
#41 0x00007ff5cb3c53e2 in QEventLoop::exec (this=this@entry=0x7ffe79037850, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#42 0x00007ff5cb3cd02c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#43 0x00007ff5cb70c31c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#44 0x00007ff5cbccd7a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#45 0x00007ff5cd100320 in kdemain (argc=3, argv=0x7ffe79037a98) at ../main_x11.cpp:300
#46 0x00007ff5ccd51a40 in __libc_start_main (main=0x4007a0 <main(int, char**)>, argc=3, argv=0x7ffe79037a98, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe79037a88) at libc-start.c:289
#47 0x00000000004007d9 in _start ()

Reported using DrKonqi