Application: systemsettings5 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-15-generic x86_64
Distribution: Ubuntu 15.04

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

I was trying to change the color of the window decorations (title area) using the "Widgets Style and Behavior / Windows Decoration" panel.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f340b857780 (LWP 15739))]

Thread 5 (Thread 0x7f33f9135700 (LWP 15740)):
#0  0x00007f3407fca8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f34062e4b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f34062e664f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f33fbef8099 in QXcbEventReader::run (this=0x195a980) at qxcbconnection.cpp:1105
#4  0x00007f340864bb0e in QThreadPrivate::start (arg=0x195a980) at thread/qthread_unix.cpp:337
#5  0x00007f34051fe6aa in start_thread (arg=0x7f33f9135700) at pthread_create.c:333
#6  0x00007f3407fd5eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f33ea155700 (LWP 15796)):
#0  0x00007f3404cdf39d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f3404cdfde8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3404cdffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f34088e2c6c in QEventDispatcherGlib::processEvents (this=0x7f33e40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f34088873e2 in QEventLoop::exec (this=this@entry=0x7f33ea154e20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f3408646b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f3407611f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f340864bb0e in QThreadPrivate::start (arg=0x1dc5a70) at thread/qthread_unix.cpp:337
#8  0x00007f34051fe6aa in start_thread (arg=0x7f33ea155700) at pthread_create.c:333
#9  0x00007f3407fd5eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f33e278c700 (LWP 15797)):
#0  QTimerInfoList::timerWait (this=0x7f33dc002cd0, tm=...) at kernel/qtimerinfo_unix.cpp:380
#1  0x00007f34088e203e in timerSourcePrepareHelper (timeout=0x7f33e278bc54, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:127
#2  timerSourcePrepare (source=<optimized out>, timeout=0x7f33e278bc54) at kernel/qeventdispatcher_glib.cpp:160
#3  0x00007f3404cdf3fd in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f3404cdfde8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f3404cdffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f34088e2c6c in QEventDispatcherGlib::processEvents (this=0x7f33dc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#7  0x00007f34088873e2 in QEventLoop::exec (this=this@entry=0x7f33e278be20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#8  0x00007f3408646b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#9  0x00007f3407611f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f340864bb0e in QThreadPrivate::start (arg=0x2310470) at thread/qthread_unix.cpp:337
#11 0x00007f34051fe6aa in start_thread (arg=0x7f33e278c700) at pthread_create.c:333
#12 0x00007f3407fd5eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f33dbfff700 (LWP 15798)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f340864cc6b in wait (time=18446744073709551615, this=0x2270e40) at thread/qwaitcondition_unix.cpp:128
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2281240, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:200
#3  0x00007f34070bdfab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f34070be3a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f340864bb0e in QThreadPrivate::start (arg=0x22811c0) at thread/qthread_unix.cpp:337
#6  0x00007f34051fe6aa in start_thread (arg=0x7f33dbfff700) at pthread_create.c:333
#7  0x00007f3407fd5eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f340b857780 (LWP 15739)):
[KCrash Handler]
#6  0x00007f3408293cf8 in main_arena () from /lib/x86_64-linux-gnu/libc.so.6
#7  0x00007f33ea9936e1 in KDecoration2::Decoration::update(QRect const&) () from /usr/lib/x86_64-linux-gnu/libkdecorations2.so.5
#8  0x00007f33ea99375b in KDecoration2::Decoration::update() () from /usr/lib/x86_64-linux-gnu/libkdecorations2.so.5
#9  0x00007f33e2a49370 in Breeze::Decoration::setOpacity (this=this@entry=0x22912e0, value=<optimized out>) at ../../kdecoration/breezedecoration.cpp:92
#10 0x00007f33e2a697a8 in Breeze::Decoration::qt_metacall (this=0x22912e0, _c=QMetaObject::WriteProperty, _id=0, _a=0x7fff42beb200) at moc_breezedecoration.cpp:146
#11 0x00007f340862c5ca in updateProperty (newValue=..., this=0x22b4020) at animation/qpropertyanimation.cpp:135
#12 QPropertyAnimation::updateCurrentValue (this=<optimized out>, value=...) at animation/qpropertyanimation.cpp:242
#13 0x00007f3408627f48 in QVariantAnimationPrivate::setCurrentValueForProgress (this=this@entry=0x22b4020, progress=progress@entry=0.96444444444444444) at animation/qvariantanimation.cpp:290
#14 0x00007f3408628d1b in recalculateCurrentInterval (force=false, this=0x22b4020) at animation/qvariantanimation.cpp:275
#15 QVariantAnimation::updateCurrentTime (this=<optimized out>) at animation/qvariantanimation.cpp:693
#16 0x00007f3408624baf in QAbstractAnimation::setCurrentTime (this=0x22b6060, msecs=130) at animation/qabstractanimation.cpp:1321
#17 0x00007f3408624e96 in updateAnimationsTime (delta=20, this=0x1badcf0) at animation/qabstractanimation.cpp:606
#18 QUnifiedTimer::updateAnimationTimers (this=0x1af49e0) at animation/qabstractanimation.cpp:323
#19 0x00007f34086257dc in QAnimationDriver::advanceAnimation (this=<optimized out>, timeStep=-1) at animation/qabstractanimation.cpp:820
#20 0x00007f34070a21ee in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#21 0x00007f34070c068a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#22 0x00007f34070c2a8b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#23 0x00007f34070c330a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#24 0x00007f34090c17b5 in QWindow::event (this=0x1e2c320, ev=<optimized out>) at kernel/qwindow.cpp:2051
#25 0x00007f34070f4dd3 in QQuickWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#26 0x00007f3409675b2c in QApplicationPrivate::notify_helper (this=0x192d4a0, receiver=0x1e2c320, e=0x7fff42beb960) at kernel/qapplication.cpp:3720
#27 0x00007f340967b000 in QApplication::notify (this=0x7fff42bebd60, receiver=0x1e2c320, e=0x7fff42beb960) at kernel/qapplication.cpp:3503
#28 0x00007f3408889c2b in QCoreApplication::notifyInternal (this=0x7fff42bebd60, receiver=receiver@entry=0x1e2c320, event=event@entry=0x7fff42beb960) at kernel/qcoreapplication.cpp:935
#29 0x00007f34090b9e86 in sendSpontaneousEvent (event=0x7fff42beb960, receiver=0x1e2c320) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#30 QGuiApplicationPrivate::processExposeEvent (e=0x1e6c640) at kernel/qguiapplication.cpp:2613
#31 0x00007f34090babbd in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x1e6c640) at kernel/qguiapplication.cpp:1638
#32 0x00007f340909f34f in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:572
#33 0x00007f33fbf22590 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#34 0x00007f3404cdfc3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f3404cdff20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f3404cdffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007f34088e2c57 in QEventDispatcherGlib::processEvents (this=0x19a0290, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#38 0x00007f34088873e2 in QEventLoop::exec (this=this@entry=0x7fff42bebc40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#39 0x00007f340888f02c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#40 0x00007f34090b031c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#41 0x00007f34096717a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#42 0x000000000040eebc in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:54

Reported using DrKonqi