Starting program: /usr/bin/kbibtex [Thread debugging using libthread_db enabled] Using host libthread_db library "/usr/lib/libthread_db.so.1". [New Thread 0x7fffd8a51640 (LWP 9396)] [New Thread 0x7fffd3fff640 (LWP 9397)] [New Thread 0x7fffd37fe640 (LWP 9398)] Thread 1 "kbibtex" received signal SIGSEGV, Segmentation fault. QObject::setParent (this=0x0, parent=0x555555666e40) at kernel/qobject.cpp:2091 2091 d->setParent_helper(parent); Thread 4 (Thread 0x7fffd37fe640 (LWP 9398) "WaylandEventThr"): #0 0x00007ffff5e39b2f in poll () at /usr/lib/libc.so.6 #1 0x00007fffe6b3c286 in poll (__timeout=-1, __nfds=2, __fds=0x7fffd37fd370) at /usr/include/bits/poll2.h:47 fds = {{fd = 3, events = 1, revents = 0}, {fd = 11, events = 1, revents = 0}} #2 QtWaylandClient::EventThread::run() (this=0x555555693e60) at /usr/src/debug/qtwayland/src/client/qwaylanddisplay.cpp:208 fds = {{fd = 3, events = 1, revents = 0}, {fd = 11, events = 1, revents = 0}} #3 0x00007ffff620c88c in QThreadPrivate::start(void*) (arg=0x555555693e60) at thread/qthread_unix.cpp:331 thr = 0x555555693e60 data = 0x7fffd37fd3d0 __clframe = {__cancel_routine = 0x7ffff620ab00 , __cancel_arg = 0x555555693e60, __do_it = 1, __cancel_type = } #4 0x00007fffecf98259 in start_thread () at /usr/lib/libpthread.so.0 #5 0x00007ffff5e445e3 in clone () at /usr/lib/libc.so.6 Thread 3 (Thread 0x7fffd3fff640 (LWP 9397) "WaylandEventThr"): #0 0x00007fffecfa48ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0 #1 0x00007fffecf9e270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #2 0x00007ffff6213cfc in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., deadline=..., this=0x555555693b70) at thread/qwaitcondition_unix.cpp:146 code = #3 QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=this@entry=0x555555694160, mutex=mutex@entry=0x555555694158, deadline=...) at thread/qwaitcondition_unix.cpp:225 #4 0x00007fffe6b3c227 in QtWaylandClient::EventThread::waitForReading() (this=0x555555694120) at /usr/include/qt/QtCore/qdeadlinetimer.h:68 lock = {val = 93824993542489} #5 QtWaylandClient::EventThread::run() (this=0x555555694120) at /usr/src/debug/qtwayland/src/client/qwaylanddisplay.cpp:206 #6 0x00007ffff620c88c in QThreadPrivate::start(void*) (arg=0x555555694120) at thread/qthread_unix.cpp:331 thr = 0x555555694120 data = 0x7fffd3ffe3d0 __clframe = {__cancel_routine = 0x7ffff620ab00 , __cancel_arg = 0x555555694120, __do_it = 1, __cancel_type = } #7 0x00007fffecf98259 in start_thread () at /usr/lib/libpthread.so.0 #8 0x00007ffff5e445e3 in clone () at /usr/lib/libc.so.6 Thread 2 (Thread 0x7fffd8a51640 (LWP 9396) "kbibtex:disk$0"): #0 0x00007fffecfa48ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0 #1 0x00007fffecf9e270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #2 0x00007fffd8e49d7c in () at /usr/lib/dri/i965_dri.so #3 0x00007fffd8e4979c in () at /usr/lib/dri/i965_dri.so #4 0x00007fffecf98259 in start_thread () at /usr/lib/libpthread.so.0 #5 0x00007ffff5e445e3 in clone () at /usr/lib/libc.so.6 Thread 1 (Thread 0x7fffda155180 (LWP 9390) "kbibtex"): #0 QObject::setParent(QObject*) (this=0x0, parent=0x555555666e40) at kernel/qobject.cpp:2091 d = Python Exception : Cannot access memory at address 0x8 #1 0x00007ffff6e22e95 in QApplication::setStyleSheet(QString const&) (this=, styleSheet=) at kernel/qapplication.cpp:949 newStyleSheetStyle = 0x555555666e40 styleSheetStyle = #2 0x00007fffd821c228 in () at /usr/lib/qt/plugins/platformthemes/libqt5ct.so #3 0x00007ffff63d7e76 in QObject::event(QEvent*) (this=, e=0x555555693c60) at kernel/qobject.cpp:1314 mce = 0x555555693c60 sender = {previous = 0x0, receiver = 0x555555667eb0, sender = 0x0, signal = -1} #4 0x00007ffff6e261a6 in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=, receiver=0x555555667eb0, e=0x555555693c60) at kernel/qapplication.cpp:3632 consumed = false filtered = false #5 0x00007ffff63b416a in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x555555667eb0, event=0x555555693c60) at kernel/qcoreapplication.cpp:1064 selfRequired = true result = false cbdata = {0x555555667eb0, 0x555555693c60, 0x7fffffffd93f} d = threadData = 0x555555625240 scopeLevelCounter = {threadData = 0x555555625240} #6 0x00007ffff63b4c69 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=0x0, event_type=0, data=0x555555625240) at kernel/qcoreapplication.cpp:1821 e = 0x555555693c60 pe = r = relocker = {m_func = {__locker = @0x7fffffffd9c0}, m_invoke = true} event_deleter = {d = 0x555555693c60} locker = {_M_device = 0x555555625270, _M_owns = false} startOffset = 0 i = @0x555555625264: 1 cleanup = {receiver = 0x0, event_type = 0, data = 0x555555625240, exceptionCaught = true} #7 0x00007ffff63fb548 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x555555698610) at kernel/qeventdispatcher_glib.cpp:277 source = 0x555555698610 #8 0x00007fffebbeef13 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0 #9 0x00007fffebc450d9 in () at /usr/lib/libglib-2.0.so.0 #10 0x00007fffebbec485 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0 #11 0x00007ffff63ff4a8 in QEventDispatcherGlib::processEvents(QFlags) (this=0x55555569cc60, flags=...) at kernel/qeventdispatcher_glib.cpp:423 d = 0x55555562d910 canWait = savedFlags = {i = 0} result = #12 0x00007fffe6b3c621 in QtWaylandClient::QWaylandDisplay::forceRoundTrip() (this=this@entry=0x555555627930) at /usr/src/debug/qtwayland/src/client/qwaylanddisplay.cpp:648 ret = 0 done = false callback = 0x555555630050 #13 0x00007fffe6b4241d in QtWaylandClient::QWaylandDisplay::registry_global(unsigned int, QString const&, unsigned int) (this=0x555555627930, id=8, interface=..., version=3) at /usr/src/debug/qtwayland/src/client/qwaylanddisplay.cpp:527 disableHardwareIntegration = registry = 0x55555562e090 copy = {> = {}, {p = {static shared_null = {ref = {atomic = {_q_value = {> = {static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, d = 0x7fffe6bca7a0 }, d = 0x7fffe6bca7a0 }} #14 0x00007fffe6b5f8a5 in QtWayland::wl_registry::handle_global(void*, wl_registry*, unsigned int, char const*, unsigned int) (data=0x555555627940, object=, name=8, interface=0x55555562f4c0 "zxdg_output_manager_v1", version=3) at /usr/src/debug/build/src/client/qwayland-wayland.cpp:94 #15 0x00007fffda8bdd4a in () at /usr/lib/libffi.so.8 #16 0x00007fffda8bd267 in () at /usr/lib/libffi.so.8 #17 0x00007fffe6abf323 in () at /usr/lib/libwayland-client.so.0 #18 0x00007fffe6abb5ab in () at /usr/lib/libwayland-client.so.0 #19 0x00007fffe6abcf4c in wl_display_dispatch_queue_pending () at /usr/lib/libwayland-client.so.0 #20 0x00007fffe6b3c546 in QtWaylandClient::QWaylandDisplay::flushRequests() (this=) at /usr/src/debug/qtwayland/src/client/qwaylanddisplay.cpp:253 #21 0x00007fffe6b3c5dc in QtWaylandClient::QWaylandDisplay::forceRoundTrip() (this=this@entry=0x555555627930) at /usr/src/debug/qtwayland/src/client/qwaylanddisplay.cpp:645 ret = 0 done = false callback = 0x555555697e10 #22 0x00007fffe6b3c6ae in QtWaylandClient::QWaylandDisplay::initialize() (this=0x555555627930) at /usr/src/debug/qtwayland/src/client/qwaylanddisplay.cpp:388 #23 0x00007fffe6b30a56 in QtWaylandClient::QWaylandIntegration::initialize() (this=0x55555562f0c0) at /usr/include/qt/QtCore/qscopedpointer.h:116 dispatcher = #24 0x00007ffff6781072 in QGuiApplicationPrivate::eventDispatcherReady() (this=) at kernel/qguiapplication.cpp:1511 #25 0x00007ffff63b9b97 in QCoreApplicationPrivate::init() (this=this@entry=0x55555562b8d0) at kernel/qcoreapplication.cpp:844 q = appPaths = 0x0 manualPaths = 0x0 thisThreadData = 0x555555625240 #26 0x00007ffff67810d7 in QGuiApplicationPrivate::init() (this=this@entry=0x55555562b8d0) at kernel/qguiapplication.cpp:1527 loadTestability = pluginList = {> = {}, {p = {static shared_null = {ref = {atomic = {_q_value = {> = {static _S_alignment = 4, _M_i = -1}, static is_always_lock_free = true}}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, d = 0x7ffff649dee0 }, d = 0x7ffff649dee0 }} session_id = {d = 0x55555562b8d0} session_key = {d = 0x55555562ba40} s = {d = 0xfffffffff6212b93} j = envPlugins = {d = 0x8} q = #27 0x00007ffff6e2337e in QApplicationPrivate::init() (this=0x55555562b8d0) at kernel/qapplication.cpp:513 #28 0x00005555555730cc in () #29 0x00007ffff5d6db25 in __libc_start_main () at /usr/lib/libc.so.6 #30 0x000055555557465e in _start ()