Bug 409231

Application: systemsettings5 (5.16.2)

Qt Version: 5.12.3
Frameworks Version: 5.59.0
Operating System: Linux 4.18.0-24-generic x86_64
Distribution: KDE neon User Edition 5.16

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

I was configuring Virtual Desktops. I added send desktop in Row 1 and then I selected number of row 2. Then System Settings crashed.

-- 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 0x7f8419bcb680 (LWP 12878))]

Thread 8 (Thread 0x7f83bd760700 (LWP 13836)):
#0  0x00007f8415138bf9 in __GI___poll (fds=0x7f83b8004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f840e1984c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f840e1985dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8415a7bdcb in QEventDispatcherGlib::processEvents (this=0x7f83b8000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f8415a1d03a in QEventLoop::exec (this=this@entry=0x7f83bd75fd40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f84158444ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007f84135fa115 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8415845c72 in QThreadPrivate::start (arg=0x564769379480) at thread/qthread_unix.cpp:361
#8  0x00007f84105566db in start_thread (arg=0x7f83bd760700) at pthread_create.c:463
#9  0x00007f841514588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f83d8668700 (LWP 12948)):
#0  0x00007f840e1953ae in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f840e197df2 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f840e198470 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f840e1985dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8415a7bdcb in QEventDispatcherGlib::processEvents (this=0x7f83d0000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f8415a1d03a in QEventLoop::exec (this=this@entry=0x7f83d8667d40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007f84158444ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#7  0x00007f84135fa115 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f8415845c72 in QThreadPrivate::start (arg=0x56476486fab0) at thread/qthread_unix.cpp:361
#9  0x00007f84105566db in start_thread (arg=0x7f83d8668700) at pthread_create.c:463
#10 0x00007f841514588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f83e0c17700 (LWP 12885)):
#0  0x00007f84151340b4 in __GI___libc_read (fd=14, buf=0x7f83e0c16b30, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f840e1dd000 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f840e197fb7 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f840e198470 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f840e1985dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8415a7bdcb in QEventDispatcherGlib::processEvents (this=0x7f83dc000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007f8415a1d03a in QEventLoop::exec (this=this@entry=0x7f83e0c16d40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7  0x00007f84158444ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#8  0x00007f84135fa115 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f8415845c72 in QThreadPrivate::start (arg=0x5647618bcf30) at thread/qthread_unix.cpp:361
#10 0x00007f84105566db in start_thread (arg=0x7f83e0c17700) at pthread_create.c:463
#11 0x00007f841514588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f83e958f700 (LWP 12884)):
#0  0x00007f8415138bf9 in __GI___poll (fds=0x7f83e4004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f840e1984c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f840e1985dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8415a7bdcb in QEventDispatcherGlib::processEvents (this=0x7f83e4000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f8415a1d03a in QEventLoop::exec (this=this@entry=0x7f83e958ed40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f84158444ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007f84135fa115 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8415845c72 in QThreadPrivate::start (arg=0x564761556440) at thread/qthread_unix.cpp:361
#8  0x00007f84105566db in start_thread (arg=0x7f83e958f700) at pthread_create.c:463
#9  0x00007f841514588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f83f5914700 (LWP 12882)):
#0  0x00007f841055c9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x56476121cfc8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x56476121cf78, cond=0x56476121cfa0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x56476121cfa0, mutex=0x56476121cf78) at pthread_cond_wait.c:655
#3  0x00007f83f6cb3dcb in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f83f6cb3af7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f84105566db in start_thread (arg=0x7f83f5914700) at pthread_create.c:463
#6  0x00007f841514588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f83fe279700 (LWP 12881)):
#0  __libc_enable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:67
#1  0x00007f8415138be6 in __GI___poll (fds=0x7f83f8004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#2  0x00007f840e1984c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f840e1985dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8415a7bdcb in QEventDispatcherGlib::processEvents (this=0x7f83f8000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f8415a1d03a in QEventLoop::exec (this=this@entry=0x7f83fe278d30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007f84158444ca in QThread::exec (this=this@entry=0x7f8416161d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:531
#7  0x00007f8415eea015 in QDBusConnectionManager::run (this=0x7f8416161d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#8  0x00007f8415845c72 in QThreadPrivate::start (arg=0x7f8416161d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:361
#9  0x00007f84105566db in start_thread (arg=0x7f83fe279700) at pthread_create.c:463
#10 0x00007f841514588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f8406240700 (LWP 12880)):
#0  0x00007f8415138bf9 in __GI___poll (fds=0x7f840623fc68, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f841011a747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f841011c36a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f84089fd578 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f8415845c72 in QThreadPrivate::start (arg=0x56476114e5a0) at thread/qthread_unix.cpp:361
#5  0x00007f84105566db in start_thread (arg=0x7f8406240700) at pthread_create.c:463
#6  0x00007f841514588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f8419bcb680 (LWP 12878)):
[KCrash Handler]
#6  std::__atomic_base<int>::load (__m=std::memory_order_relaxed, this=0x6c007000700041) at /usr/include/c++/7/bits/atomic_base.h:396
#7  QAtomicOps<int>::load<int> (_q_value=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qatomic_cxx11.h:227
#8  QBasicAtomicInteger<int>::load (this=0x6c007000700041) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qbasicatomic.h:103
#9  QtPrivate::RefCount::ref (this=0x6c007000700041) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qrefcount.h:55
#10 QString::QString (other=..., this=0x7fffb6a150f8) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h:958
#11 KWin::DesktopsModel::desktopCreated (this=0x56476e577310, id=..., data=...) at ./kcmkwin/kwindesktop/desktopsmodel.cpp:503
#12 0x00007f83b6b95fdd in KWin::DesktopsModel::qt_static_metacall (_o=_o@entry=0x56476e577310, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=7, _a=_a@entry=0x7fffb6a152b0) at ./obj-x86_64-linux-gnu/kcmkwin/kwindesktop/kcm_kwin_virtualdesktops_autogen/EWIEGA46WW/moc_desktopsmodel.cpp:183
#13 0x00007f83b6b96345 in KWin::DesktopsModel::qt_metacall (this=0x56476e577310, _c=QMetaObject::InvokeMetaMethod, _id=7, _a=0x7fffb6a152b0) at ./obj-x86_64-linux-gnu/kcmkwin/kwindesktop/kcm_kwin_virtualdesktops_autogen/EWIEGA46WW/moc_desktopsmodel.cpp:315
#14 0x00007f8415ef5128 in QDBusConnectionPrivate::deliverCall (this=<optimized out>, object=<optimized out>, msg=..., metaTypes=..., slotIdx=<optimized out>) at qdbusintegrator.cpp:991
#15 0x00007f8415a4f3e2 in QObject::event (this=0x56476e577310, e=<optimized out>) at kernel/qobject.cpp:1260
#16 0x00007f8416aa965c in QApplicationPrivate::notify_helper (this=this@entry=0x56476112e900, receiver=receiver@entry=0x56476e577310, e=e@entry=0x7f83f8013050) at kernel/qapplication.cpp:3736
#17 0x00007f8416ab0b90 in QApplication::notify (this=0x7fffb6a159b0, receiver=0x56476e577310, e=0x7f83f8013050) at kernel/qapplication.cpp:3483
#18 0x00007f8415a1ed18 in QCoreApplication::notifyInternal2 (receiver=0x56476e577310, event=0x7f83f8013050) at kernel/qcoreapplication.cpp:1060
#19 0x00007f8415a1eeee in QCoreApplication::sendEvent (receiver=<optimized out>, event=event@entry=0x7f83f8013050) at kernel/qcoreapplication.cpp:1450
#20 0x00007f8415a218d7 in QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x564761125ff0) at kernel/qcoreapplication.cpp:1799
#21 0x00007f8415a21e78 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1653
#22 0x00007f8415a7c793 in postEventSourceDispatch (s=0x564761182c40) at kernel/qeventdispatcher_glib.cpp:276
#23 0x00007f840e198317 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f840e198550 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f840e1985dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f8415a7bdaf in QEventDispatcherGlib::processEvents (this=0x564761193d70, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#27 0x00007f8415a1d03a in QEventLoop::exec (this=this@entry=0x7fffb6a158d0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#28 0x00007f8415a26170 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1363
#29 0x000056475f595218 in main (argc=<optimized out>, argv=<optimized out>) at ./app/main.cpp:71

Possible duplicates by query: bug 409110, bug 396314.

Reported using DrKonqi