Bug 352959

Application: systemsettings5 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-28-generic x86_64
Distribution: Ubuntu 15.04

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

Clicked on the "Display and Monitor" icon in System Settings and then clicked the "< Overview" button (the one cooresponding to the Alt+Left keystroke) on the top-left to return.  The window crashes.  Also happens if I use  Alt+Left keystroke.

- Custom settings of the application:

For the Compositor tab:
Animation Speed - center
Scale Method - Accurate
Rendering Backend - OpenGL 3.1
OpenGL Interface - GFX
Tearing Prevention - Automatic
Keep window thumbnails - Only for shown windows

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 0x7fa97ef64780 (LWP 5454))]

Thread 4 (Thread 0x7fa96f759700 (LWP 5455)):
#0  0x00007fa97b6588dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa979972b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fa97997464f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fa9724ec099 in QXcbEventReader::run (this=0xeb2650) at qxcbconnection.cpp:1105
#4  0x00007fa97bd4cb0e in QThreadPrivate::start (arg=0xeb2650) at thread/qthread_unix.cpp:337
#5  0x00007fa97888c6aa in start_thread (arg=0x7fa96f759700) at pthread_create.c:333
#6  0x00007fa97b663eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fa95d90b700 (LWP 5457)):
#0  0x00007fa97b65449d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa9783b12f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa97836d96c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa97836de60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa97836e242 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa95de13af6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007fa978394955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fa97888c6aa in start_thread (arg=0x7fa95d90b700) at pthread_create.c:333
#8  0x00007fa97b663eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fa9570ff700 (LWP 5459)):
#0  0x00007fa97b65a0b7 in ioctl () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa961256919 in uki_firegl_MicroSleep () from /usr/lib/libatiuki.so.1
#2  0x00007fa96318b920 in ?? () from /usr/lib/dri/fglrx_dri.so
#3  0x00007fa96291cd72 in ?? () from /usr/lib/dri/fglrx_dri.so
#4  0x00007fa96291cdc5 in ?? () from /usr/lib/dri/fglrx_dri.so
#5  0x00007fa97888c6aa in start_thread (arg=0x7fa9570ff700) at pthread_create.c:333
#6  0x00007fa97b663eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fa97ef64780 (LWP 5454)):
[KCrash Handler]
#6  0x00007fa97a761d6b in QQuickItemPrivate::addToDirtyList() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fa97a761e28 in QQuickItemPrivate::dirty(QQuickItemPrivate::DirtyType) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fa97a76c045 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007fa97bfbc73a in QObject::event (this=0x34908d0, e=<optimized out>) at kernel/qobject.cpp:1245
#10 0x00007fa97a76ab6b in QQuickItem::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007fa97cd76b2c in QApplicationPrivate::notify_helper (this=0xe99a80, receiver=0x34908d0, e=0x7fa93c0343c0) at kernel/qapplication.cpp:3720
#12 0x00007fa97cd7c000 in QApplication::notify (this=0x7fffd58aa560, receiver=0x34908d0, e=0x7fa93c0343c0) at kernel/qapplication.cpp:3503
#13 0x00007fa97bf8ac2b in QCoreApplication::notifyInternal (this=0x7fffd58aa560, receiver=0x34908d0, event=event@entry=0x7fa93c0343c0) at kernel/qcoreapplication.cpp:935
#14 0x00007fa97bf8cc9b in sendEvent (event=0x7fa93c0343c0, 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=0xe98ce0) at kernel/qcoreapplication.cpp:1552
#16 0x00007fa97bf8d298 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#17 0x00007fa97bfe3843 in postEventSourceDispatch (s=0xed6230) at kernel/qeventdispatcher_glib.cpp:271
#18 0x00007fa97836dc3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007fa97836df20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fa97836dfcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007fa97bfe3c57 in QEventDispatcherGlib::processEvents (this=0xed3250, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#22 0x00007fa97bf883e2 in QEventLoop::exec (this=this@entry=0x7fffd58aa440, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#23 0x00007fa97bf9002c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#24 0x00007fa97c7b131c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#25 0x00007fa97cd727a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#26 0x000000000040eebc in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:54

Reported using DrKonqi