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3: wlp4s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff permaddr xx:xx:xx:xx:xx:xx

Thread 1 "knetstats" received signal SIGSEGV, Segmentation fault.
__vfscanf_internal (s=0x0, format=0x4232ca "%llu", argptr=argptr@entry=0x7fffffffd570, mode_flags=mode_flags@entry=2) at vfscanf-internal.c:345
Downloading source file /usr/src/debug/glibc-2.37-5.fc38.x86_64/stdio-common/vfscanf-internal.c
345       ORIENT;                                                                                                                                                                                                                                             
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(gdb) bt
#0  __vfscanf_internal (s=0x0, format=0x4232ca "%llu", argptr=argptr@entry=0x7fffffffd570, mode_flags=mode_flags@entry=2) at vfscanf-internal.c:345
#1  0x00007ffff60777df in __isoc99_fscanf (stream=<optimized out>, format=<optimized out>) at isoc99_fscanf.c:30
#2  0x00000000004172aa in KNetStatsView::readInterfaceNumValue(char const*) (this=0x5e8e80, name=0x423296 "rx_bytes") at /tmp/KNetStats-main/src/knetstatsview.cpp:187
#3  0x0000000000416abe in KNetStatsView::updateStats() (this=0x5e8e80) at /tmp/KNetStats-main/src/knetstatsview.cpp:117
#4  0x00000000004183cf in QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, void (KNetStatsView::*)()>::call(void (KNetStatsView::*)(), KNetStatsView*, void**)
    (f=(void (KNetStatsView::*)(class KNetStatsView * const)) 0x416734 <KNetStatsView::updateStats()>, o=0x5e8e80, arg=0x7fffffffd920) at /usr/include/qt5/QtCore/qobjectdefs_impl.h:152
#5  0x0000000000418289 in QtPrivate::FunctionPointer<void (KNetStatsView::*)()>::call<QtPrivate::List<>, void>(void (KNetStatsView::*)(), KNetStatsView*, void**)
    (f=(void (KNetStatsView::*)(class KNetStatsView * const)) 0x416734 <KNetStatsView::updateStats()>, o=0x5e8e80, arg=0x7fffffffd920) at /usr/include/qt5/QtCore/qobjectdefs_impl.h:185
#6  0x00000000004180c1 in QtPrivate::QSlotObject<void (KNetStatsView::*)(), QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) (which=1, this_=0x6445e0, r=0x5e8e80, a=0x7fffffffd920, ret=0x0)
    at /usr/include/qt5/QtCore/qobjectdefs_impl.h:418
#7  0x00007ffff68e8481 in QtPrivate::QSlotObjectBase::call(QObject*, void**) (a=0x7fffffffd920, r=<optimized out>, this=0x6445e0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#8  doActivate<false>(QObject*, int, void**) (sender=0x631450, signal_index=3, argv=0x7fffffffd920) at kernel/qobject.cpp:3925
#9  0x00007ffff68e33a7 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=<optimized out>, m=m@entry=0x7ffff6b66560 <QTimer::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffffffd920)
    at kernel/qobject.cpp:3985
#10 0x00007ffff68eb9fd in QTimer::timeout(QTimer::QPrivateSignal) (this=<optimized out>, _t1=...) at .moc/moc_qtimer.cpp:205
#11 0x00007ffff68decab in QObject::event(QEvent*) (this=0x631450, e=0x7fffffffda90) at kernel/qobject.cpp:1369
#12 0x00007ffff75aeb75 in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x631450, e=0x7fffffffda90) at kernel/qapplication.cpp:3640
#13 0x00007ffff68b41a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x631450, event=0x7fffffffda90) at kernel/qcoreapplication.cpp:1064
#14 0x00007ffff68b43c2 in QCoreApplication::sendEvent(QObject*, QEvent*) (receiver=<optimized out>, event=<optimized out>) at kernel/qcoreapplication.cpp:1462
#15 0x00007ffff6905a9b in QTimerInfoList::activateTimers() (this=0x5864d0) at kernel/qtimerinfo_unix.cpp:643
#16 0x00007ffff6906399 in timerSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:183
#17 0x00007ffff55134fc in g_main_dispatch (context=0x7fffec000ee0) at ../glib/gmain.c:3460
#18 g_main_context_dispatch (context=0x7fffec000ee0) at ../glib/gmain.c:4200
#19 0x00007ffff55716b8 in g_main_context_iterate.isra.0 (context=0x7fffec000ee0, block=1, dispatch=1, self=<optimized out>) at ../glib/gmain.c:4276
#20 0x00007ffff5510b83 in g_main_context_iteration (context=0x7fffec000ee0, may_block=1) at ../glib/gmain.c:4343
#21 0x00007ffff6906749 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x5808b0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#22 0x00007ffff68b2b6b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fffffffdd50, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
#23 0x00007ffff68badfb in QCoreApplication::exec() () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#24 0x00000000004185fb in main(int, char**) (argc=1, argv=0x7fffffffdf88) at /tmp/KNetStats-main/src/main.cpp:19