Thread 1 "dms_qt" received signal SIGSEGV, Segmentation fault.
0x00007fffea9a3f2b in _int_malloc (av=av@entry=0x7fffeacfac40 <main_arena>, bytes=bytes@entry=769) at malloc.c:4028
4028    malloc.c: No such file or directory.
(gdb) bt
#0  0x00007fffea9a3f2b in _int_malloc (av=av@entry=0x7fffeacfac40 <main_arena>, bytes=bytes@entry=769) at malloc.c:4028
#1  0x00007fffea9a48f5 in _int_realloc (av=av@entry=0x7fffeacfac40 <main_arena>, oldp=oldp@entry=0x5555573d2930, oldsize=oldsize@entry=400, nb=nb@entry=784) at malloc.c:4570
#2  0x00007fffea9a7f9b in __GI___libc_realloc (oldmem=0x5555573d2940, bytes=768) at malloc.c:3230
#3  0x00007fffe9e25ad0 in QStrokerOps::strokePath(QPainterPath const&, void*, QTransform const&) () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Gui.so.5
#4  0x00007fffe9dec651 in QPainterPathStroker::createStroke(QPainterPath const&) const () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Gui.so.5
#5  0x00007fff9abaac42 in QtCharts::LineChartItem::updateGeometry() () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Charts.so.5
#6  0x00007fff9abc1eb9 in QtCharts::XYChart::handlePointAdded(int) () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Charts.so.5
#7  0x00007fffed504629 in QMetaObject::activate(QObject*, int, int, void**) () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Core.so.5
#8  0x00007fff9abc2661 in QtCharts::QXYSeries::pointAdded(int) () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Charts.so.5
#9  0x00007fff9abc428b in QtCharts::QXYSeries::insert(int, QPointF const&) () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Charts.so.5
#10 0x00007fff9abc6092 in QtCharts::QXYModelMapperPrivate::insertData(int, int) () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Charts.so.5
#11 0x00007fff9abc622d in QtCharts::QXYModelMapperPrivate::modelRowsAdded(QModelIndex, int, int) () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Charts.so.5
#12 0x00007fff9abc6899 in QtCharts::QXYModelMapperPrivate::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) [clone .part.23] () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Charts.so.5
#13 0x00007fffed504629 in QMetaObject::activate(QObject*, int, int, void**) () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Core.so.5
#14 0x00007fffed48851e in QAbstractItemModel::rowsInserted(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Core.so.5
#15 0x00007fffed4901bb in QAbstractItemModel::endInsertRows() () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Core.so.5
#16 0x000055555556c4ac in ChartModel::appendData(double) (this=0x555555fd0a70, leftEye=0) at /home/rahul.c/code/dms_qt/src/chartmodel.cpp:124
#17 0x000055555556f205 in ChartModel::qt_metacall(QMetaObject::Call, int, void**) (this=0x555555fd0a70, _c=QMetaObject::InvokeMetaMethod, _id=9, _a=0x7fffffff8d20)
    at /home/rahul.c/code/dms_qt/build/src/dms_qt_autogen/EWIEGA46WW/moc_chartmodel.cpp:240
#18 0x00007fffee4eeb89 in QQmlObjectOrGadget::metacall(QMetaObject::Call, int, void**) const () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Qml.so.5
#19 0x00007fffee3f683d in CallMethod(QQmlObjectOrGadget const&, int, int, int, int*, QV4::ExecutionEngine*, QV4::CallData*, QMetaObject::Call) () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Qml.so.5
#20 0x00007fffee3f7dbd in CallPrecise(QQmlObjectOrGadget const&, QQmlPropertyData const&, QV4::ExecutionEngine*, QV4::CallData*, QMetaObject::Call) () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Qml.so.5
#21 0x00007fffee3f8b3e in QV4::QObjectMethod::callInternal(QV4::Value const*, QV4::Value const*, int) const () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Qml.so.5
#22 0x00007fffee47b5bd in QV4::Runtime::method_callProperty(QV4::ExecutionEngine*, QV4::Value*, int, QV4::Value*, int) () at /home/rahul.c/Qt5.12.0/5.12.0/gcc_64/lib/libQt5Qml.so.5
#23 0x00007fffc00e1e04 in  ()
#24 0x0000000000000000 in  ()