Application: kwin_x11 (5.7.5)

Qt Version: 5.6.1
Frameworks Version: 5.26.0
Operating System: Linux 4.8.0-34-generic x86_64
Distribution: Ubuntu 16.10

-- Information about the crash:
- What I was doing when the application crashed:
I just logged into the system. I didnt notice any unusual behavior at first log in, however the system locks up when left idle for over 2hrs.

-- 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 0x7f2872a63940 (LWP 16435))]

Thread 5 (Thread 0x7f285147f700 (LWP 16532)):
#0  QTimerInfoList::updateCurrentTime (this=this@entry=0x7f27c8001118) at kernel/qtimerinfo_unix.cpp:85
#1  0x00007f28873a43e6 in QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7f27c80008e0, flags=..., flags@entry=..., timeout=timeout@entry=0x0) at kernel/qeventdispatcher_unix.cpp:171
#2  0x00007f28873a4c6a in QEventDispatcherUNIX::processEvents (this=0x7f27c80008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#3  0x00007f288734f0fa in QEventLoop::exec (this=this@entry=0x7f285147ec60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007f2887174d43 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#5  0x00007f2881c25c65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007f2887179c68 in QThreadPrivate::start (arg=0x559ab83fa2e0) at thread/qthread_unix.cpp:341
#7  0x00007f2882ac76ca in start_thread (arg=0x7f285147f700) at pthread_create.c:333
#8  0x00007f288952b0af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 4 (Thread 0x7f285d27a700 (LWP 16468)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f288650e574 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f28865f5f00 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f288650e5b9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f2882ac76ca in start_thread (arg=0x7f285d27a700) at pthread_create.c:333
#4  0x00007f288952b0af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7f28699f0700 (LWP 16441)):
#0  0x00007f2889520ea3 in select () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f28873a2caf in qt_safe_select (nfds=14, fdread=fdread@entry=0x7f2858000a78, fdwrite=fdwrite@entry=0x7f2858000d08, fdexcept=fdexcept@entry=0x7f2858000f98, orig_timeout=orig_timeout@entry=0x0) at kernel/qcore_unix.cpp:75
#2  0x00007f28873a4754 in QEventDispatcherUNIX::select (timeout=0x0, exceptfds=0x7f2858000f98, writefds=0x7f2858000d08, readfds=0x7f2858000a78, nfds=<optimized out>, this=0x7f28580008c0) at kernel/qeventdispatcher_unix.cpp:320
#3  QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7f28580008e0, flags=..., flags@entry=..., timeout=timeout@entry=0x0) at kernel/qeventdispatcher_unix.cpp:196
#4  0x00007f28873a4c6a in QEventDispatcherUNIX::processEvents (this=0x7f28580008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#5  0x00007f288734f0fa in QEventLoop::exec (this=this@entry=0x7f28699efc60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f2887174d43 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#7  0x00007f2881c25c65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f2887179c68 in QThreadPrivate::start (arg=0x559ab794cd40) at thread/qthread_unix.cpp:341
#9  0x00007f2882ac76ca in start_thread (arg=0x7f28699f0700) at pthread_create.c:333
#10 0x00007f288952b0af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7f2872a5f700 (LWP 16436)):
#0  0x00007f288951f0bd in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f28800279d6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2880027aec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f28873a74ab in QEventDispatcherGlib::processEvents (this=0x7f286c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007f288734f0fa in QEventLoop::exec (this=this@entry=0x7f2872a5ec50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f2887174d43 in QThread::exec (this=this@entry=0x7f2889b9fd60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:500
#6  0x00007f2889b2b575 in QDBusConnectionManager::run (this=0x7f2889b9fd60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:171
#7  0x00007f2887179c68 in QThreadPrivate::start (arg=0x7f2889b9fd60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:341
#8  0x00007f2882ac76ca in start_thread (arg=0x7f2872a5f700) at pthread_create.c:333
#9  0x00007f288952b0af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7f2872a63940 (LWP 16435)):
[KCrash Handler]
#6  0x000001de00000004 in ?? ()
#7  0x00007f28873848f0 in QObject::connect (sender=0x559ab839ea50, signal=signal@entry=0x7f2886598855 "2destroyed(QObject*)", receiver=0x559ab838ebb0, method=method@entry=0x7f2886598837 "1_q_objectDestroyed(QObject*)", type=type@entry=Qt::AutoConnection) at kernel/qobject.cpp:2642
#8  0x00007f288654f3e7 in QScriptEnginePrivate::qobjectData (this=this@entry=0x559ab83eed40, object=object@entry=0x559ab839ea50) at api/qscriptengine.cpp:1573
#9  0x00007f288654f4af in QScriptEnginePrivate::newQObject (this=this@entry=0x559ab83eed40, object=object@entry=0x559ab839ea50, ownership=ownership@entry=QScriptEngine::QtOwnership, options=...) at api/qscriptengine.cpp:1504
#10 0x00007f288654f742 in QScriptEngine::newQObject (this=<optimized out>, object=0x559ab839ea50, ownership=ownership@entry=QScriptEngine::QtOwnership, options=...) at api/qscriptengine.cpp:2281
#11 0x00007f288912237c in KWin::effectWindowToScriptValue (eng=<optimized out>, window=<optimized out>) at ./scripting/scriptedeffect.cpp:417
#12 0x00007f288654fa25 in QScriptEnginePrivate::create (exec=exec@entry=0x559ab83eef48, type=1140, ptr=ptr@entry=0x7ffdff2ea538) at api/qscriptengine.cpp:3081
#13 0x00007f2886576b43 in QScript::QObjectConnectionManager::execute (this=this@entry=0x559ab83e3000, slotIndex=slotIndex@entry=0, argv=argv@entry=0x7ffdff2ea540) at bridge/qscriptqobject.cpp:2173
#14 0x00007f288657f1a5 in QScript::QObjectConnectionManager::qt_static_metacall (_a=0x7ffdff2ea540, _id=0, _c=QMetaObject::InvokeMetaMethod, _o=0x559ab83e3000) at bridge/qscriptqobject.cpp:2070
#15 QScript::QObjectConnectionManager::qt_metacall (this=0x559ab83e3000, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7ffdff2ea540) at bridge/qscriptqobject.cpp:2099
#16 0x00007f288737e877 in QMetaObject::activate (sender=0x559ab8234ef0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffdff2ea540) at kernel/qobject.cpp:3745
#17 0x00007f288737f0f7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f2886d42a80 <KWin::EffectsHandler::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffdff2ea540) at kernel/qobject.cpp:3595
#18 0x00007f2886b34b28 in KWin::EffectsHandler::desktopPresenceChanged (this=<optimized out>, _t1=<optimized out>, _t2=<optimized out>, _t3=<optimized out>) at ./obj-x86_64-linux-gnu/libkwineffects/moc_kwineffects.cpp:1262
#19 0x00007f2886b3612c in KWin::EffectsHandler::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./obj-x86_64-linux-gnu/libkwineffects/moc_kwineffects.cpp:577
#20 0x00007f288737f699 in QObject::event (this=0x559ab8234ef0, e=<optimized out>) at kernel/qobject.cpp:1256
#21 0x00007f2887c8c8ac in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x559ab8234ef0, e=0x559ab8b1a2f0) at kernel/qapplication.cpp:3804
#22 0x00007f2887c91d4f in QApplication::notify (this=0x7ffdff2eab10, receiver=0x559ab8234ef0, e=0x559ab8b1a2f0) at kernel/qapplication.cpp:3561
#23 0x00007f28873513b0 in QCoreApplication::notifyInternal2 (receiver=0x559ab8234ef0, event=event@entry=0x559ab8b1a2f0) at kernel/qcoreapplication.cpp:1015
#24 0x00007f288735333c in QCoreApplication::sendEvent (event=0x559ab8b1a2f0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:225
#25 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x559ab776f620) at kernel/qcoreapplication.cpp:1650
#26 0x00007f28873a4b52 in QEventDispatcherUNIX::processEvents (this=0x559ab77b89a0, flags=...) at kernel/qeventdispatcher_unix.cpp:579
#27 0x00007f2871d4594d in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:62
#28 0x00007f288734f0fa in QEventLoop::exec (this=this@entry=0x7ffdff2eaa00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#29 0x00007f288735790c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1285
#30 0x00007f288769ba7c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1602
#31 0x00007f2887c898e5 in QApplication::exec () at kernel/qapplication.cpp:2979
#32 0x00007f28897f3206 in kdemain (argc=<optimized out>, argv=0x7ffdff2eac98) at ./main_x11.cpp:466
#33 0x00007f28894433f1 in __libc_start_main (main=0x559ab700a7e0 <main>, argc=1, argv=0x7ffdff2eac98, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffdff2eac88) at ../csu/libc-start.c:291
#34 0x0000559ab700a81a in _start ()

Reported using DrKonqi