Bug 368017

Application: systemsettings5 (5.6.5)

Qt Version: 5.5.1
Frameworks Version: 5.23.0
Operating System: Linux 4.4.0-36-generic x86_64
Distribution: Ubuntu 16.04.1 LTS

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

I have assigned Meta+M key shortcut for window maximize action.
Then I have assigned the same shorcut for window minimize action.
I got a dialog asking me whether I want to reassign the shorcut to new action.
I have confirmed it and the system settings has crashed.

The crash can be reproduced every time.

-- Backtrace:
Application: Nastavení systému (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc52162e8c0 (LWP 10857))]

Thread 2 (Thread 0x7fc50fe4f700 (LWP 10858)):
#0  0x00007fc51dd4ce8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fc51b7fdc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fc51b7ff8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fc5121a1629 in QXcbEventReader::run (this=0x20244e0) at qxcbconnection.cpp:1253
#4  0x00007fc51e44284e in QThreadPrivate::start (arg=0x20244e0) at thread/qthread_unix.cpp:331
#5  0x00007fc51af876fa in start_thread (arg=0x7fc50fe4f700) at pthread_create.c:333
#6  0x00007fc51dd58b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fc52162e8c0 (LWP 10857)):
[KCrash Handler]
#6  QString::QString (other=<error reading variable: Cannot access memory at address 0x8>, this=0x7fff0d87c060) at ../../include/QtCore/../../src/corelib/tools/qstring.h:877
#7  QLabel::text (this=0x0) at widgets/qlabel.cpp:322
#8  0x00007fc520f19701 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#9  0x00007fc51e651e4f in QtPrivate::QSlotObjectBase::call (a=0x7fff0d87c1b0, r=0x7fc51c606580, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#10 QMetaObject::activate (sender=0x7fc51c606580, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3698
#11 0x00007fc51c3ecc34 in KGlobalAccel::globalShortcutChanged(QAction*, QKeySequence const&) () from /usr/lib/x86_64-linux-gnu/libKF5GlobalAccel.so.5
#12 0x00007fc51c3f06fe in ?? () from /usr/lib/x86_64-linux-gnu/libKF5GlobalAccel.so.5
#13 0x00007fc51e651fca in QMetaObject::activate (sender=0x2651e80, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3713
#14 0x00007fc51c3fb279 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5GlobalAccel.so.5
#15 0x00007fc51c3fd385 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5GlobalAccel.so.5
#16 0x00007fc52178f913 in QDBusConnectionPrivate::deliverCall (this=0x207fee0, object=0x2651e80, msg=..., metaTypes=..., slotIdx=6) at qdbusintegrator.cpp:978
#17 0x00007fc51e652ea1 in QObject::event (this=0x2651e80, e=<optimized out>) at kernel/qobject.cpp:1239
#18 0x00007fc51fafc05c in QApplicationPrivate::notify_helper (this=this@entry=0x200c5f0, receiver=receiver@entry=0x2651e80, e=e@entry=0x279a850) at kernel/qapplication.cpp:3716
#19 0x00007fc51fb01516 in QApplication::notify (this=0x7fff0d87cc30, receiver=0x2651e80, e=0x279a850) at kernel/qapplication.cpp:3499
#20 0x00007fc51e62362b in QCoreApplication::notifyInternal (this=0x7fff0d87cc30, receiver=0x2651e80, event=event@entry=0x279a850) at kernel/qcoreapplication.cpp:965
#21 0x00007fc51e625a26 in QCoreApplication::sendEvent (event=0x279a850, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x200bc70) at kernel/qcoreapplication.cpp:1593
#23 0x00007fc51e625f08 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#24 0x00007fc51e679673 in postEventSourceDispatch (s=0x2052750) at kernel/qeventdispatcher_glib.cpp:271
#25 0x00007fc51aa661a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fc51aa66400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fc51aa664ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007fc51e679a7f in QEventDispatcherGlib::processEvents (this=0x2068cb0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#29 0x00007fc51e620dea in QEventLoop::exec (this=this@entry=0x7fff0d87cb10, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#30 0x00007fc51e628e8c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#31 0x00007fc51f542c3c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1542
#32 0x00007fc51faf8495 in QApplication::exec () at kernel/qapplication.cpp:2976
#33 0x000000000040c0a1 in main (argc=1, argv=<optimized out>) at /build/systemsettings-tnsOXW/systemsettings-5.6.5/app/main.cpp:55

Reported using DrKonqi