Bug 349430

Application: kdeinit5 (5.3.1)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-22-generic x86_64
Distribution: Ubuntu 15.04

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

Switching between different applications and finally trying to switch back to the KDE controle module

-- Backtrace:
Application: KDE Control Module (kdeinit5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f06e3fe9780 (LWP 3360))]

Thread 6 (Thread 0x7f06d00eb700 (LWP 3361)):
#0  0x00007f06e27078dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f06e0c02b72 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f06e0c0464f in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f06d2d1b099 in QXcbEventReader::run() (this=0x1afd210) at qxcbconnection.cpp:1105
#4  0x00007f06e2a79b0e in QThreadPrivate::start(void*) (arg=0x1afd210) at thread/qthread_unix.cpp:337
#5  0x00007f06e03566aa in start_thread (arg=0x7f06d00eb700) at pthread_create.c:333
#6  0x00007f06e2712eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f06c6ff5700 (LWP 3364)):
#0  0x00007f06e270349d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f06df93d2f0 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7f06c6ff4d70, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007f06df93d2f0 in g_wakeup_acknowledge (wakeup=0x1b87340) at /build/buildd/glib2.0-2.44.1/./glib/gwakeup.c:210
#3  0x00007f06df8f996c in g_main_context_check (context=context@entry=0x1bb8600, max_priority=2147483647, fds=fds@entry=0x7f06c00010c0, n_fds=n_fds@entry=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3600
#4  0x00007f06df8f9e60 in g_main_context_iterate (context=0x1bb8600, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3805
#5  0x00007f06df8fa242 in g_main_loop_run (loop=0x1bb92f0) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:4002
#6  0x00007f06cdd9caf6 in gdbus_shared_thread_func (user_data=0x1bb9ba0) at /build/buildd/glib2.0-2.44.1/./gio/gdbusprivate.c:274
#7  0x00007f06df920955 in g_thread_proxy (data=0x1b8aca0) at /build/buildd/glib2.0-2.44.1/./glib/gthread.c:764
#8  0x00007f06e03566aa in start_thread (arg=0x7f06c6ff5700) at pthread_create.c:333
#9  0x00007f06e2712eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f06c67f4700 (LWP 3365)):
#0  0x00007f06df93e789 in g_mutex_lock (mutex=mutex@entry=0x1bc2b60) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1336
#1  0x00007f06df8f973e in g_main_context_check (context=context@entry=0x1bc2b60, max_priority=2147483647, fds=fds@entry=0x7f06b80008c0, n_fds=n_fds@entry=2) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3589
#2  0x00007f06df8f9e60 in g_main_context_iterate (context=context@entry=0x1bc2b60, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3805
#3  0x00007f06df8f9fcc in g_main_context_iteration (context=0x1bc2b60, may_block=may_block@entry=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f06df8fa009 in glib_worker_main (data=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:5618
#5  0x00007f06df920955 in g_thread_proxy (data=0x1b8aed0) at /build/buildd/glib2.0-2.44.1/./glib/gthread.c:764
#6  0x00007f06e03566aa in start_thread (arg=0x7f06c67f4700) at pthread_create.c:333
#7  0x00007f06e2712eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f06abfff700 (LWP 3369)):
#0  0x00007f06e27078dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f06df8f9ebc in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f06a4003270, timeout=-1, context=0x7f06a4000990) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:4103
#2  0x00007f06df8f9ebc in g_main_context_iterate (context=context@entry=0x7f06a4000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3803
#3  0x00007f06df8f9fcc in g_main_context_iteration (context=0x7f06a4000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f06e2d10c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f06a40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f06e2cb53e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f06abffee20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f06e2a74b44 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f06d3681f65 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f06e2a79b0e in QThreadPrivate::start(void*) (arg=0x1b29ab0) at thread/qthread_unix.cpp:337
#9  0x00007f06e03566aa in start_thread (arg=0x7f06abfff700) at pthread_create.c:333
#10 0x00007f06e2712eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f069a12e700 (LWP 3387)):
#0  0x00007f06df93e789 in g_mutex_lock (mutex=mutex@entry=0x7f0694000990) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1336
#1  0x00007f06df8f92d7 in g_main_context_prepare (context=context@entry=0x7f0694000990, priority=priority@entry=0x7f069a12dd00) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3350
#2  0x00007f06df8f9de8 in g_main_context_iterate (context=context@entry=0x7f0694000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3788
#3  0x00007f06df8f9fcc in g_main_context_iteration (context=0x7f0694000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f06e2d10c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f06940008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f06e2cb53e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f069a12de40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f06e2a74b44 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f06e2a79b0e in QThreadPrivate::start(void*) (arg=0x5898de0) at thread/qthread_unix.cpp:337
#8  0x00007f06e03566aa in start_thread (arg=0x7f069a12e700) at pthread_create.c:333
#9  0x00007f06e2712eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f06e3fe9780 (LWP 3360)):
[KCrash Handler]
#6  0x00007f06d35a2f97 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f06d354d151 in QV4::ExecutionEngine::~ExecutionEngine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f06d36850d5 in QV8Engine::~QV8Engine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f06d36852b9 in QV8Engine::~QV8Engine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f06d34ea061 in QJSEngine::~QJSEngine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f06d35e73c5 in QQmlEngine::~QQmlEngine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f06d35e7499 in QQmlEngine::~QQmlEngine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007f06a0760242 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#14 0x00007f06a07643f8 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#15 0x00007f06a0764419 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#16 0x00007f06e2ce9778 in QObject::event(QEvent*) (this=0x59a8490, e=<optimized out>) at kernel/qobject.cpp:1236
#17 0x00007f06e1179b2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=0x1adabd0, receiver=0x59a8490, e=0x5b57e30) at kernel/qapplication.cpp:3720
#18 0x00007f06e117f000 in QApplication::notify(QObject*, QEvent*) (this=0x7ffebb64c360, receiver=0x59a8490, e=0x5b57e30) at kernel/qapplication.cpp:3503
#19 0x00007f06e2cb7c2b in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffebb64c360, receiver=0x59a8490, event=event@entry=0x5b57e30) at kernel/qcoreapplication.cpp:935
#20 0x00007f06e2cb9c9b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (event=0x5b57e30, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#21 0x00007f06e2cb9c9b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=0x0, event_type=52, data=0x1a92b90) at kernel/qcoreapplication.cpp:1552
#22 0x00007f06d312ab6e in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#23 0x00007f06d315c463 in QQuickWindow::~QQuickWindow() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#24 0x00007f06d320ba49 in QQuickView::~QQuickView() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#25 0x00007f06e11d8dd5 in QWindowContainer::~QWindowContainer() (this=0x233c4f0, __in_chrg=<optimized out>) at kernel/qwindowcontainer.cpp:219
#26 0x00007f06e11d8df9 in QWindowContainer::~QWindowContainer() (this=0x233c4f0, __in_chrg=<optimized out>) at kernel/qwindowcontainer.cpp:220
#27 0x00007f06e2ce718c in QObjectPrivate::deleteChildren() (this=this@entry=0x1e50300) at kernel/qobject.cpp:1950
#28 0x00007f06e11b957a in QWidget::~QWidget() (this=0x1b386c0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1642
#29 0x00007f06e11b97e9 in QWidget::~QWidget() (this=0x1b386c0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1662
#30 0x00007f06e2ce718c in QObjectPrivate::deleteChildren() (this=this@entry=0x1ddb420) at kernel/qobject.cpp:1950
#31 0x00007f06e11b957a in QWidget::~QWidget() (this=0x1dda160, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1642
#32 0x00007f06bc9414fe in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_kwindecoration.so
#33 0x00007f06e2ce718c in QObjectPrivate::deleteChildren() (this=this@entry=0x1dd1ae0) at kernel/qobject.cpp:1950
#34 0x00007f06e11b957a in QWidget::~QWidget() (this=0x1dd9970, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1642
#35 0x00007f06d85311c7 in KCModule::~KCModule() () at /usr/lib/x86_64-linux-gnu/libKF5ConfigWidgets.so.5
#36 0x00007f06bc93c1a1 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_kwindecoration.so
#37 0x00007f06d282fe34 in KCModuleProxy::deleteClient() () at /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#38 0x00007f06d282ff36 in KCModuleProxy::~KCModuleProxy() () at /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#39 0x00007f06d2830049 in KCModuleProxy::~KCModuleProxy() () at /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#40 0x00007f06e2ce718c in QObjectPrivate::deleteChildren() (this=this@entry=0x1dc0d70) at kernel/qobject.cpp:1950
#41 0x00007f06e11b957a in QWidget::~QWidget() (this=0x1dbfdc0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1642
#42 0x00007f06d8a5ec5e in  () at /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#43 0x00007f06e2ce718c in QObjectPrivate::deleteChildren() (this=this@entry=0x1dc0240) at kernel/qobject.cpp:1950
#44 0x00007f06e11b957a in QWidget::~QWidget() (this=0x1dc0860, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1642
#45 0x00007f06d8a625d9 in KPageWidget::~KPageWidget() () at /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#46 0x00007f06e2ce718c in QObjectPrivate::deleteChildren() (this=this@entry=0x1dbff00) at kernel/qobject.cpp:1950
#47 0x00007f06e11b957a in QWidget::~QWidget() (this=0x1dc0810, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1642
#48 0x00007f06d2a5c86e in  () at /usr/lib/x86_64-linux-gnu/libkdeinit5_kcmshell5.so
#49 0x00007f06d2a5a3df in kdemain () at /usr/lib/x86_64-linux-gnu/libkdeinit5_kcmshell5.so
#50 0x0000000000408716 in  ()
#51 0x000000000040a132 in  ()
#52 0x000000000040a6ee in  ()
#53 0x000000000040501b in main ()

Reported using DrKonqi