[Qt-interest] QByteArray bug?

[Frank Hemer]

On Friday 10 July 2009 21:02:27 Pascal Patry wrote:
> On Friday 10 July 2009 14:51:16 Frank Hemer wrote:
> > I have a Method:
> >
> > MyArray::getData (int len) {
> >    QByteArray arr;
> >    arr.resize (len);
> >    arr.data ();
>
> Why are you calling 'arr.data()' if it's to do nothing with the returned
> ptr?

The code is just an excerpt.
Without that call it works fine:-(

> >    return arr;
> > }
> >
> > >From another place, this is called:
> >
> > MyArray myArray;
> > QByteArray arr = myArray.getData (x);
> > qDebug ("arr size: %i", arr.size ());
> >
> > This works for all values of x
> > BUT NOT FOR 0??
> >
> > if x is zero, the array size printed seems to be unpredictable.
> >
> > Seems like a bug to me?!
> >
> > Found in qt4.4.2
> >
> > Frank
>
> I've tried this in Qt 4.5.1:
> ====
> int main(int /*argc*/, char ** /*argv*/)
> {
>         QByteArray a;
>         a.resize(0);
>         a.data();
>         qDebug("size of a: %d", a.size());
>         return 0;
> }
>
> and the result is:
>  => size of a: 0

It only fails if its in a method - the way you tried it works fine.
I'll see if I can post sample code ...

Frank