Unsolved Bug in my code causing crash Qt Spectrogram
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Here is the code I believe is suspect as there is a direct reference to Line 45 in my showpeak function in the call stack.
void ShowPeak::updatePeak()
{
m_peak = QPointF(0, -100000);QXYSeries* series = static_cast<QXYSeries*>(m_chart->series()[0]); QValueAxis* axisX = static_cast<QValueAxis*>(m_chart->axisX(series)); for (const QPointF& p : series->pointsVector()) { if (p.y() > m_peak.y() && p.x() >= axisX->min() && p.x() <= axisX->max()) { m_peak = p; } }
}
I am using multithreading, but I am not sure what exactly is causing my project to fail. The error code is:
Exception thrown: read access violation.
_Tgt was 0x2990070.Many thanks to anyone who can provide any insight.
J
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@aha_1980
for (const QPointF& p : series->pointsVector()) -
Hi,
Are you sure that this pointer is valid ?
Also, you should rather use dynamic_cast (or qobject_cast if it’s for a QObject based class) and check the returned value against null_ptr.