Application: systemsettings5 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-25-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
- What I was doing when the application crashed:
I was changing windows decoration, but it also happened while changing themes and desktop behavior

- Custom settings of the application:
Any customization of such features can cause crash of the system settings window.
I tried different settings and it happens that the window crashes without any correlation with the specific setting I'm working on. I mean that it can crash or not for the same setting or action.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Impostazioni di sistema (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f0a205d5780 (LWP 2300))]

Thread 5 (Thread 0x7f0a0dcaf700 (LWP 2301)):
#0  0x00007f0a1cceb8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f0a1afe1b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f0a1afe364f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f0a10a8b099 in QXcbEventReader::run (this=0x7e6a30) at qxcbconnection.cpp:1105
#4  0x00007f0a1d373b0e in QThreadPrivate::start (arg=0x7e6a30) at thread/qthread_unix.cpp:337
#5  0x00007f0a19edf6aa in start_thread (arg=0x7f0a0dcaf700) at pthread_create.c:333
#6  0x00007f0a1ccf6eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f09fe00a700 (LWP 2303)):
#0  0x00007f0a1cceb8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f0a199b9ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0a199b9fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0a1d60ac6c in QEventDispatcherGlib::processEvents (this=0x7f09f80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f0a1d5af3e2 in QEventLoop::exec (this=this@entry=0x7f09fe009e20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f0a1d36eb44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f0a1c321f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f0a1d373b0e in QThreadPrivate::start (arg=0x100c270) at thread/qthread_unix.cpp:337
#8  0x00007f0a19edf6aa in start_thread (arg=0x7f09fe00a700) at pthread_create.c:333
#9  0x00007f0a1ccf6eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f09f655f700 (LWP 2304)):
#0  0x00007f0a1d36b9ca in testAndSetRelaxed<QMutexData*> (currentValue=<synthetic pointer>, newValue=0x1, expectedValue=0x0, _q_value=@0x12e80e8: 0x1) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86.h:259
#1  testAndSetAcquire<QMutexData*, QMutexData*> (currentValue=<synthetic pointer>, newValue=0x1, expectedValue=0x0, _q_value=@0x12e80e8: 0x1) at ../../include/QtCore/../../src/corelib/thread/qgenericatomic.h:166
#2  testAndSetAcquire (currentValue=<synthetic pointer>, newValue=0x1, expectedValue=0x0, this=0x12e80e8, this@entry=0x1) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:270
#3  fastTryLock (current=<synthetic pointer>, this=0x12e80e8, this@entry=0x1) at thread/qmutex.h:82
#4  QMutex::lock (this=this@entry=0x12e80e8) at thread/qmutex.cpp:212
#5  0x00007f0a1d60a1db in QMutexLocker (m=0x12e80e8, this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:128
#6  canWaitLocked (this=0x12e80c0) at ../../include/QtCore/5.4.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:243
#7  postEventSourcePrepare (s=0x7f09f00012d0, timeout=0x7f09f655ec54) at kernel/qeventdispatcher_glib.cpp:254
#8  0x00007f0a199b93fd in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f0a199b9de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f0a199b9fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f0a1d60ac6c in QEventDispatcherGlib::processEvents (this=0x7f09f00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#12 0x00007f0a1d5af3e2 in QEventLoop::exec (this=this@entry=0x7f09f655ee20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#13 0x00007f0a1d36eb44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#14 0x00007f0a1c321f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007f0a1d373b0e in QThreadPrivate::start (arg=0x12f6f80) at thread/qthread_unix.cpp:337
#16 0x00007f0a19edf6aa in start_thread (arg=0x7f09f655f700) at pthread_create.c:333
#17 0x00007f0a1ccf6eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f09effbf700 (LWP 2305)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0a1d374c6b in wait (time=18446744073709551615, this=0x169d380) at thread/qwaitcondition_unix.cpp:128
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x12ce170, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:200
#3  0x00007f0a1bdcafab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f0a1bdcb3a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f0a1d373b0e in QThreadPrivate::start (arg=0x12ce0f0) at thread/qthread_unix.cpp:337
#6  0x00007f0a19edf6aa in start_thread (arg=0x7f09effbf700) at pthread_create.c:333
#7  0x00007f0a1ccf6eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f0a205d5780 (LWP 2300)):
[KCrash Handler]
#6  0x00007f09fe8c36b7 in KDecoration2::Decoration::update(QRect const&) () from /usr/lib/x86_64-linux-gnu/libkdecorations2.so.5
#7  0x00007f09fe8c375b in KDecoration2::Decoration::update() () from /usr/lib/x86_64-linux-gnu/libkdecorations2.so.5
#8  0x00007f09f681e370 in Breeze::Decoration::setOpacity (this=this@entry=0x1285ef0, value=<optimized out>) at ../../kdecoration/breezedecoration.cpp:92
#9  0x00007f09f683e7a8 in Breeze::Decoration::qt_metacall (this=0x1285ef0, _c=QMetaObject::WriteProperty, _id=0, _a=0x7ffd0a7f1b00) at moc_breezedecoration.cpp:146
#10 0x00007f0a1d3545ca in updateProperty (newValue=..., this=0x1286a50) at animation/qpropertyanimation.cpp:135
#11 QPropertyAnimation::updateCurrentValue (this=<optimized out>, value=...) at animation/qpropertyanimation.cpp:242
#12 0x00007f0a1d34ff48 in QVariantAnimationPrivate::setCurrentValueForProgress (this=this@entry=0x1286a50, progress=progress@entry=0.96444444444444444) at animation/qvariantanimation.cpp:290
#13 0x00007f0a1d350d1b in recalculateCurrentInterval (force=false, this=0x1286a50) at animation/qvariantanimation.cpp:275
#14 QVariantAnimation::updateCurrentTime (this=<optimized out>) at animation/qvariantanimation.cpp:693
#15 0x00007f0a1d34cbaf in QAbstractAnimation::setCurrentTime (this=0x1261e20, msecs=130) at animation/qabstractanimation.cpp:1321
#16 0x00007f0a1d34ce96 in updateAnimationsTime (delta=20, this=0x92efd0) at animation/qabstractanimation.cpp:606
#17 QUnifiedTimer::updateAnimationTimers (this=0xa789d0) at animation/qabstractanimation.cpp:323
#18 0x00007f0a1d34d7dc in QAnimationDriver::advanceAnimation (this=<optimized out>, timeStep=-1) at animation/qabstractanimation.cpp:820
#19 0x00007f0a1bdaf1ee in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x00007f0a1bdcd68a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#21 0x00007f0a1bdcfa8b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#22 0x00007f0a1bdd030a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#23 0x00007f0a1ddf47b5 in QWindow::event (this=0xdf1590, ev=<optimized out>) at kernel/qwindow.cpp:2051
#24 0x00007f0a1be01dd3 in QQuickWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#25 0x00007f0a1e3abb2c in QApplicationPrivate::notify_helper (this=0x7b9550, receiver=0xdf1590, e=0x7ffd0a7f2260) at kernel/qapplication.cpp:3720
#26 0x00007f0a1e3b1000 in QApplication::notify (this=0x7ffd0a7f2660, receiver=0xdf1590, e=0x7ffd0a7f2260) at kernel/qapplication.cpp:3503
#27 0x00007f0a1d5b1c2b in QCoreApplication::notifyInternal (this=0x7ffd0a7f2660, receiver=receiver@entry=0xdf1590, event=event@entry=0x7ffd0a7f2260) at kernel/qcoreapplication.cpp:935
#28 0x00007f0a1ddece86 in sendSpontaneousEvent (event=0x7ffd0a7f2260, receiver=0xdf1590) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#29 QGuiApplicationPrivate::processExposeEvent (e=0xc7c730) at kernel/qguiapplication.cpp:2613
#30 0x00007f0a1ddedbbd in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0xc7c730) at kernel/qguiapplication.cpp:1638
#31 0x00007f0a1ddd234f in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:572
#32 0x00007f0a10ab5590 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#33 0x00007f0a199b9c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f0a199b9f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f0a199b9fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f0a1d60ac57 in QEventDispatcherGlib::processEvents (this=0x8276c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#37 0x00007f0a1d5af3e2 in QEventLoop::exec (this=this@entry=0x7ffd0a7f2540, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#38 0x00007f0a1d5b702c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#39 0x00007f0a1dde331c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#40 0x00007f0a1e3a77a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#41 0x000000000040eebc in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:54

Reported using DrKonqi