Bug 356364

Application: systemsettings5 (5.5.0)

Qt Version: 5.5.1
Operating System: Linux 4.2.6-200.fc22.x86_64+debug x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
Just browsing system settings... looking for task bar settings to group applications. didn't find it. quit button is gone now so I used the big X on the top right to exit.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/usr/lib64/libthread_db.so.1".
81	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7f8ba2c89840 (LWP 19171))]

Thread 4 (Thread 0x7f8b86ff0700 (LWP 19183)):
#0  0x00007f8b9ceeb2fd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8b99e38182 in _xcb_conn_wait (__timeout=-1, __nfds=1, __fds=0x7f8b86fefc80) at /usr/include/bits/poll2.h:46
#2  0x00007f8b99e38182 in _xcb_conn_wait (c=c@entry=0xcf1b40, cond=cond@entry=0xcf1b80, vector=vector@entry=0x0, count=count@entry=0x0) at xcb_conn.c:459
#3  0x00007f8b99e39c77 in xcb_wait_for_event (c=0xcf1b40) at xcb_in.c:648
#4  0x00007f8b8a01eda9 in QXcbEventReader::run() (this=0xcfbf70) at qxcbconnection.cpp:1254
#5  0x00007f8b9daf83ce in QThreadPrivate::start(void*) (arg=0xcfbf70) at thread/qthread_unix.cpp:331
#6  0x00007f8b995f4555 in start_thread (arg=0x7f8b86ff0700) at pthread_create.c:333
#7  0x00007f8b9cef6b9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f8b750e0700 (LWP 20383)):
#0  0x00007f8b9ceeb2fd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8b9883ddbc in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f8b701c55e0, timeout=<optimized out>, context=0x7f8b70031e80) at gmain.c:4103
#2  0x00007f8b9883ddbc in g_main_context_iterate (context=context@entry=0x7f8b70031e80, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3  0x00007f8b9883decc in g_main_context_iteration (context=0x7f8b70031e80, may_block=may_block@entry=1) at gmain.c:3869
#4  0x00007f8b9dd2ff0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f8b700e78b0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f8b9dcd6f0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f8b750dfd60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f8b9daf3424 in QThread::exec() (this=this@entry=0x2ddfe20) at thread/qthread.cpp:503
#7  0x00007f8b9c2c6b45 in QQmlThreadPrivate::run() (this=0x2ddfe20) at /usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/qml/qml/ftw/qqmlthread.cpp:141
#8  0x00007f8b9daf83ce in QThreadPrivate::start(void*) (arg=0x2ddfe20) at thread/qthread_unix.cpp:331
#9  0x00007f8b995f4555 in start_thread (arg=0x7f8b750e0700) at pthread_create.c:333
#10 0x00007f8b9cef6b9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f8b63fff700 (LWP 21986)):
#0  0x00007f8b9ceeb2fd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8b9883ddbc in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f8b5c0ba0d0, timeout=<optimized out>, context=0x1bb7eb0) at gmain.c:4103
#2  0x00007f8b9883ddbc in g_main_context_iterate (context=0x1bb7eb0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3  0x00007f8b9883e142 in g_main_loop_run (loop=0x1bb7e40) at gmain.c:4002
#4  0x00007f8b6895e696 in gdbus_shared_thread_func (user_data=0x1bb7e80) at gdbusprivate.c:274
#5  0x00007f8b988650a5 in g_thread_proxy (data=0x35a5050) at gthread.c:764
#6  0x00007f8b995f4555 in start_thread (arg=0x7f8b63fff700) at pthread_create.c:333
#7  0x00007f8b9cef6b9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f8ba2c89840 (LWP 19171)):
[KCrash Handler]
#5  0x0000000000000000 in  ()
#6  0x00007f8b9dd0c4f9 in QObject::disconnect(QObject const*, char const*, QObject const*, char const*) (sender=0x1407bd0, signal=0x14e4fd9 "destroyed()", receiver=0x14f7b50, method=0x14e54c9 "slotManagedTopLevelWidgetDestroyed()") at kernel/qobject.cpp:2932
#7  0x00007f8b7a0f6289 in KParts::PartManager::~PartManager() () at /usr/lib64/libKF5Parts.so.5
#8  0x00007f8b7a0f6549 in KParts::PartManager::~PartManager() () at /usr/lib64/libKF5Parts.so.5
#9  0x00007f8b9dd0685b in QObjectPrivate::deleteChildren() (this=this@entry=0x1465d50) at kernel/qobject.cpp:1946
#10 0x00007f8b9dd100c0 in QObject::~QObject() (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1024
#11 0x00007f8b7a84d75b in KHTMLPart::~KHTMLPart() () at /usr/lib64/libKF5KHtml.so.5
#12 0x00007f8b7a84d879 in KHTMLPart::~KHTMLPart() () at /usr/lib64/libKF5KHtml.so.5
#13 0x00007f8b9dd091d0 in QObject::event(QEvent*) (this=0x1465cc0, e=<optimized out>) at kernel/qobject.cpp:1230
#14 0x00007f8b9fa6a41c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0xce1570, receiver=receiver@entry=0x1465cc0, e=e@entry=0x14ba6d0) at kernel/qapplication.cpp:3716
#15 0x00007f8b9fa6f8e6 in QApplication::notify(QObject*, QEvent*) (this=0x7fff005100c0, receiver=0x1465cc0, e=0x14ba6d0) at kernel/qapplication.cpp:3499
#16 0x00007f8b9dcd977b in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7fff005100c0, receiver=0x1465cc0, event=event@entry=0x14ba6d0) at kernel/qcoreapplication.cpp:965
#17 0x00007f8b9dcdbb76 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (event=0x14ba6d0, receiver=<optimized out>) at kernel/qcoreapplication.h:224
#18 0x00007f8b9dcdbb76 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xce0b80) at kernel/qcoreapplication.cpp:1593
#19 0x00007f8b9dcdc058 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#20 0x00007f8b9dd2fae3 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0xd37cf0) at kernel/qeventdispatcher_glib.cpp:271
#21 0x00007f8b9883da8a in g_main_context_dispatch (context=0x7f8b800016f0) at gmain.c:3122
#22 0x00007f8b9883da8a in g_main_context_dispatch (context=context@entry=0x7f8b800016f0) at gmain.c:3737
#23 0x00007f8b9883de20 in g_main_context_iterate (context=context@entry=0x7f8b800016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3808
#24 0x00007f8b9883decc in g_main_context_iteration (context=0x7f8b800016f0, may_block=may_block@entry=1) at gmain.c:3869
#25 0x00007f8b9dd2feef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0xd3aa30, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#26 0x00007f8b9dcd6f0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fff0050ffa0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#27 0x00007f8b9dcdefec in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1229
#28 0x000000000040f00b in main ()

Reported using DrKonqi