.
Thread 3 (Thread 0x7f61f02d6700 (LWP 20497)):
#0  0x00007f6204d3fbf9 in __GI___poll (fds=0x7f61e8003ce0, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
        sc_ret = <optimized out>
#1  0x00007f61fcc21439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f61fcc2154c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f62021898ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#4  0x00007f620212e9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#5  0x00007f6201f4d22a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#6  0x00007f6202606d45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
No symbol table info available.
#7  0x00007f6201f5216d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#8  0x00007f61fecee6db in start_thread (arg=0x7f61f02d6700) at pthread_create.c:463
        pd = 0x7f61f02d6700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140058618062592, -5972671331653865255, 140058618060544, 0, 140058925964640, 140735081268688, 6043601225064952025, 6043604803070243033}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#9  0x00007f6204d4c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.
.
Thread 2 (Thread 0x7f61e2931700 (LWP 20504)):
#0  0x00007f61fecf49f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x563c095fa1f0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
        __ret = -512
        oldtype = 0
        err = <optimized out>
        oldtype = <optimized out>
        err = <optimized out>
        __ret = <optimized out>
        resultvar = <optimized out>
        __arg4 = <optimized out>
        __arg3 = <optimized out>
        __arg2 = <optimized out>
        __arg1 = <optimized out>
        _a4 = <optimized out>
        _a3 = <optimized out>
        _a2 = <optimized out>
        _a1 = <optimized out>
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x563c095fa1a0, cond=0x563c095fa1c8) at pthread_cond_wait.c:502
        spin = 0
        buffer = {__routine = 0x7f61fecf4690 <__condvar_cleanup_waiting>, __arg = 0x7f61e2930d40, __canceltype = 46, __prev = 0x0}
        cbuffer = {wseq = 0, cond = 0x563c095fa1c8, mutex = 0x563c095fa1a0, private = 0}
        rt = <optimized out>
        err = <optimized out>
        g = 0
        flags = <optimized out>
        g1_start = <optimized out>
        signals = <optimized out>
        result = 0
        wseq = <optimized out>
        seq = 0
        private = <optimized out>
        maxspin = <optimized out>
        err = <optimized out>
        result = <optimized out>
        wseq = <optimized out>
        g = <optimized out>
        seq = <optimized out>
        flags = <optimized out>
        private = <optimized out>
        signals = <optimized out>
        g1_start = <optimized out>
        spin = <optimized out>
        buffer = <optimized out>
        cbuffer = <optimized out>
        rt = <optimized out>
        s = <optimized out>
#2  __pthread_cond_wait (cond=0x563c095fa1c8, mutex=0x563c095fa1a0) at pthread_cond_wait.c:655
No locals.
#3  0x00007f61e3be6c4b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
No symbol table info available.
#4  0x00007f61e3be6977 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
No symbol table info available.
#5  0x00007f61fecee6db in start_thread (arg=0x7f61e2931700) at pthread_create.c:463
        pd = 0x7f61e2931700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140058389845760, -5972671331653865255, 140058389843712, 0, 94815857941520, 140735081265136, 6043560458845991129, 6043604803070243033}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#6  0x00007f6204d4c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.
.
Thread 1 (Thread 0x7f6205407800 (LWP 20496)):
#0  0x00007f61ff561783 in XAddExtension () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#1  0x00007f61ee31d49b in ?? () from /usr/lib/x86_64-linux-gnu/libXft.so.2
No symbol table info available.
#2  0x00007f61ee31d9be in XftDefaultHasRender () from /usr/lib/x86_64-linux-gnu/libXft.so.2
No symbol table info available.
#3  0x00007f61ee31e088 in XftDefaultSubstitute () from /usr/lib/x86_64-linux-gnu/libXft.so.2
No symbol table info available.
#4  0x00007f61ee320929 in XftFontMatch () from /usr/lib/x86_64-linux-gnu/libXft.so.2
No symbol table info available.
#5  0x00007f61ee320ac5 in XftFontOpen () from /usr/lib/x86_64-linux-gnu/libXft.so.2
No symbol table info available.
#6  0x00007f61ee9c0aad in KFI::CFcEngine::getFont(int) () from /usr/lib/x86_64-linux-gnu/libkfontinstui.so.5
No symbol table info available.
#7  0x00007f61ee9c0f72 in KFI::CFcEngine::queryFont() () from /usr/lib/x86_64-linux-gnu/libkfontinstui.so.5
No symbol table info available.
#8  0x00007f61ee9c1708 in KFI::CFcEngine::getSizes() () from /usr/lib/x86_64-linux-gnu/libkfontinstui.so.5
No symbol table info available.
#9  0x00007f61ee9c2865 in KFI::CFcEngine::draw(QString const&, unsigned int, int, QColor const&, QColor const&, int, int, bool, QList<KFI::CFcEngine::TRange> const&, QList<KFI::CFcEngine::TChar>*) () from /usr/lib/x86_64-linux-gnu/libkfontinstui.so.5
No symbol table info available.
#10 0x00007f61eee62cd1 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_fontinst.so
No symbol table info available.
#11 0x00007f61eee8b186 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_fontinst.so
No symbol table info available.
#12 0x00007f61eee9e0a9 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_fontinst.so
No symbol table info available.
#13 0x00007f620215f5b5 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#14 0x00007f61eee9c665 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_fontinst.so
No symbol table info available.
#15 0x00007f61eee7edf1 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_fontinst.so
No symbol table info available.
#16 0x00007f61eee9d9a1 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_fontinst.so
No symbol table info available.
#17 0x00007f620215f5b5 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#18 0x00007f62020dc617 in QItemSelectionModel::selectionChanged(QItemSelection const&, QItemSelection const&) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#19 0x00007f62020e0eb0 in QItemSelectionModel::emitSelectionChanged(QItemSelection const&, QItemSelection const&) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#20 0x00007f62020e4083 in QItemSelectionModel::select(QItemSelection const&, QFlags<QItemSelectionModel::SelectionFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#21 0x00007f62020de64c in QItemSelectionModel::select(QModelIndex const&, QFlags<QItemSelectionModel::SelectionFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#22 0x00007f61eee7870c in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_fontinst.so
No symbol table info available.
#23 0x00007f61eee8d255 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_fontinst.so
No symbol table info available.
#24 0x00007f61eee9e1bb in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_fontinst.so
No symbol table info available.
#25 0x00007f620215f5b5 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#26 0x00007f61eee9c53e in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_fontinst.so
No symbol table info available.
#27 0x00007f61eee9d44f in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_fontinst.so
No symbol table info available.
#28 0x00007f620215f5b5 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#29 0x00007f61eee9f585 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_fontinst.so
No symbol table info available.
#30 0x00007f61eeea02a5 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_fontinst.so
No symbol table info available.
#31 0x00007f62026120f8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
No symbol table info available.
#32 0x00007f6202160122 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#33 0x00007f620313882c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
No symbol table info available.
#34 0x00007f62031400f4 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
No symbol table info available.
#35 0x00007f62021309a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#36 0x00007f620213311d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#37 0x00007f620218a2c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#38 0x00007f61fcc21287 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#39 0x00007f61fcc214c0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#40 0x00007f61fcc2154c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#41 0x00007f62021898ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#42 0x00007f620212e9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#43 0x00007f6202137a84 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#44 0x00007f6205024d10 in kdemain () from /usr/lib/x86_64-linux-gnu/libkdeinit5_kcmshell5.so
No symbol table info available.
#45 0x00007f6204c4cb97 in __libc_start_main (main=0x563c07ae1740, argc=2, argv=0x7fff7086cac8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff7086cab8) at ../csu/libc-start.c:310
        self = <optimized out>
        __self = <optimized out>
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 100416531682078937, 94815826876240, 140735081269952, 0, 0, 5972386754034708697, 6041797256557015257}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x7f620523a733 <_dl_init+259>, 0x7f6205228998}, data = {prev = 0x0, cleanup = 0x0, canceltype = 86222643}}}
        not_first_call = <optimized out>
#46 0x0000563c07ae177a in _start ()
No symbol table info available.