ASSERT failure in QList<T>::operator[]: "index out of range"

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here is the section of code which facing this problem..

QString line = in.readLine();
        QStringList fields = line.split(",");
        fields.replaceInStrings(" ", "");
        QString IDstr = fields[0];         
        int slotDec = fields[1].toInt(&ok, 16);
        int IDstrdec = IDstr.toInt(&ok, 16);   
        int BaseID = MainWindow::NodeBaseID(IDstrdec);
        int NodeID= IDstrdec-BaseID;

would be nice if someone guide me how to come out of this problem??

Posted 24-Nov-15 22:55pm

XamBEE

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KarstenK · Answer 1 · 2015-11-24T23:11:00

Solution 1

normally means that exception that the list hasnt that size. Check it before any access.

Is your input correct for your splitting?

Plz learn to use a debugger.

Posted 24-Nov-15 23:11pm

KarstenK

CPallini · Answer 2 · 2015-11-24T23:13:00

Solution 2

You are assuming fields[1] exists, that is the QStringList contains at least two items. Such an assumption, according to the documentation[^], is wrong.

Posted 24-Nov-15 23:13pm

CPallini

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XamBEE 25-Nov-15 5:30am

I am reading the file which has 4 columns. i am trying to split them with , and use them further....
what would be the better way to improve this type of situation?

Naveen.Sanagasetti · Answer 3 · 2015-11-24T23:21:00

As per error message "Index out of range", if you are trying to access the outside the range of the index then you will get this type of error, in your code you are calling fields[1] if there is no field with that particular index then you will get this type of error.

To resolve this type of error, before access that index check the index length.