crash in destructor of vector<QwtPlotCurve *>

[Matthias P. <mat...@gm...>]

This is the trackback:

     QLaserDynamicd.exe!std::_Vector_val<QwtPlotCurve 
*,std::allocator<QwtPlotCurve *> >::~_Vector_val<QwtPlotCurve 
*,std::allocator<QwtPlotCurve *> >()  + 0x21 bytes    C++
 >    QLaserDynamicd.exe!std::vector<QwtPlotCurve 
*,std::allocator<QwtPlotCurve *> >::~vector<QwtPlotCurve 
*,std::allocator<QwtPlotCurve *> >()  Line 547 + 0xf bytes    C++
     QLaserDynamicd.exe!QCurvePlot::~QCurvePlot()  Line 38 + 0x62 
bytes    C++
     QLaserDynamicd.exe!QCurvePlot::`scalar deleting destructor'()  + 
0x16 bytes    C++


I have not the slightest idea why.
I disabled all code I have written in the last two hours, but I still 
get these crashes.

It would be very great if someone has an idea, because with this state I 
cannot continou to work!

This is the header:

class QCurvePlot : public QwtPlot
{
    Q_OBJECT
public:
    QCurvePlot(QWidget* parent = 0, Qt::WFlags flags = 0);
    virtual ~QCurvePlot();

public:

    vector<QwtPlotCurve*> Curve;
    QwtLegend legend;
    QwtLinearScaleEngine * ylinearScaleEngine;
    QwtLog10ScaleEngine * ylogScaleEngine;
    Zoomer * zoomer;
    QwtSymbol symbol;

    struct structDataXY{
        structDataXY() : x(0), y(0) {}
        double * x;
        double * y;
    };
   
private:
    void initZoomer();
    void initWidget();
    void clear();

    vector<structDataXY> data;

    QString description;
public:
    void setDescription(QString str) { description = str; }
    void addCurve();
    void setData(const unsigned int number,  vector<double> & xData, 
vector<double> & yData, int start, int size);
    void setData(const unsigned int number, vector<double> & xData, 
vector<double> & yData);
    void setData(const unsigned int number, const double * xData, const 
double * yData, int size);   
    void setData(const unsigned int number, const double * xData, const 
double * yData, int start, int size);
    void insertLegend(QwtPlot::LegendPosition legendPosition);
    void copyProperties(QCurvePlot * plot);
};


and this the constructor and destructor:


QCurvePlot::QCurvePlot(QWidget* parent /*= 0*/, Qt::WFlags flags /*= 
0*/) //: QWidget(parent, flags)
: QwtPlot(parent)
, zoomer(new Zoomer(this))
, ylinearScaleEngine(new QwtLinearScaleEngine())
, ylogScaleEngine(new QwtLog10ScaleEngine())
{
    QSizePolicy sizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    sizePolicy.setHorizontalStretch(20);
    sizePolicy.setVerticalStretch(20);
    this->setSizePolicy(sizePolicy);

    initWidget();
}

QCurvePlot::~QCurvePlot()
{
    for (int i = 0; i < (int)data.size(); i++)
    {
        delete [] data[i].x;
        delete [] data[i].y;
        delete Curve[i];
    }
    delete zoomer;
    delete ylinearScaleEngine;
    delete ylogScaleEngine;
    qDebug() << description;
}