exception occurs when converting QString to std::string

[kimitake]

Hi,

I have setup Qt SDK on Windows XP and tried to build my app,
and then got an exception error when converting QString to
std::string using QString::toStdString().
This happens on Simulator Qt for Visual Studio 2008 env.
I have other project, e.g. 4.6.2 Desktop, and it works fine.

So I just created a sample hello world app using QtCreator,
and add the following code MainWindow constructor.

QString qstr = "1234567890123456";
std::string sstr = qstr.toStdString();

In this case, when exiting from the constructor function,
I get an exception error as follow.

HEAP[testsdk01.exe]: Invalid Address specified to RtlValidateHeap( 00BF0000, 0124B7D8 )

The issue happens if the QString length is more than 16.

Is this a bug?

[danhicksbyron]

Do you have STL compatibility enabled?

[kimitake]

I guess it is a configure option to build Qt package,
if so, I don't know whether the Qt for Simulator is enable STL compatibility or not.

In addition, the toStdString() works if the original string length is less than 16.
So I think STL compatibility enabled...

[apoenitz2]

This would be a bug and should be filed at bugreports.qt.nokia.com.

Note, however, that you'd usually use QByteArray ba = qstr.toLatin1() or qstr.toUtf8() followed by std::string sstr = ba.data() or similar as this allows you to communicated the intended encoding directly.

[kimitake]

apoenitz2, thanks for the info.
I confirmed your workaround worked. I don't get an exception anymore.
Anyway I will file it as bug.