Application: systemsettings5 (5.4.1)

Qt Version: 5.4.2
Operating System: Linux 4.2.0-16-generic x86_64
Distribution: Ubuntu 15.10

-- Information about the crash:
- What I was doing when the application crashed:
I change rendering mode on OpenGL 3.1 a after 4-5 seconds application has been crashed. Developers,  learn the computer science and fix the bugs, please.

The crash can be reproduced every time.

-- Backtrace:
Application: Параметры системы (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fa8dc031800 (LWP 2234))]

Thread 2 (Thread 0x7fa8c8f95700 (LWP 2235)):
#0  0x00007fa8d87c48dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa8d64d4bd2 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fa8d64d674f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fa8cbd2ea39 in QXcbEventReader::run (this=0x1e4ae00) at qxcbconnection.cpp:1105
#4  0x00007fa8d8eb72be in QThreadPrivate::start (arg=0x1e4ae00) at thread/qthread_unix.cpp:337
#5  0x00007fa8d5c5f6aa in start_thread (arg=0x7fa8c8f95700) at pthread_create.c:333
#6  0x00007fa8d87cfeed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fa8dc031800 (LWP 2234)):
[KCrash Handler]
#6  0x00007fa8d7b08f9f in QQuickItemPrivate::addToDirtyList() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fa8d7b09053 in QQuickItemPrivate::dirty(QQuickItemPrivate::DirtyType) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fa8d7b13935 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007fa8d90c8651 in QObject::event (this=0x86b10e0, e=<optimized out>) at kernel/qobject.cpp:1245
#10 0x00007fa8d7b1310b in QQuickItem::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007fa8da51ab8c in QApplicationPrivate::notify_helper (this=this@entry=0x1e1cce0, receiver=receiver@entry=0x86b10e0, e=e@entry=0x7fa898163940) at kernel/qapplication.cpp:3720
#12 0x00007fa8da520230 in QApplication::notify (this=0x7fffe8683090, receiver=0x86b10e0, e=0x7fa898163940) at kernel/qapplication.cpp:3503
#13 0x00007fa8d9096f1b in QCoreApplication::notifyInternal (this=0x7fffe8683090, receiver=0x86b10e0, event=event@entry=0x7fa898163940) at kernel/qcoreapplication.cpp:935
#14 0x00007fa8d9099057 in QCoreApplication::sendEvent (event=0x7fa898163940, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#15 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1e1c320) at kernel/qcoreapplication.cpp:1552
#16 0x00007fa8d9099588 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#17 0x00007fa8d90ede73 in postEventSourceDispatch (s=0x1e86340) at kernel/qeventdispatcher_glib.cpp:271
#18 0x00007fa8d573fff7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007fa8d5740250 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fa8d57402fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007fa8d90ee27f in QEventDispatcherGlib::processEvents (this=0x1e863c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#22 0x00007fa8d909475a in QEventLoop::exec (this=this@entry=0x7fffe8682f70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#23 0x00007fa8d909c2cc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#24 0x00007fa8d9f6700c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#25 0x00007fa8da517025 in QApplication::exec () at kernel/qapplication.cpp:2956
#26 0x000000000040f04b in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:55

Possible duplicates by query: bug 354150, bug 354011, bug 353945, bug 353782, bug 353583.

Reported using DrKonqi