Crash on exit in qt5winextras.dll Windows XP 32 - c++

Question

GUI widgets(c++) application is built with the latest Qt Creator, Qt 5.4.1 MinGW SDK(qt-opensource-windows-x86-mingw491_opengl-5.4.1.exe) on Windows 8.1 x64
PRO file:
QT += core gui network winextras
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
Everything is by defaults, no special settings. App runs and works on Windows XP x86 SP3 but when closed it crashes giving a generic windows "Send error to Windows" dialog.
Windows Logs show that the crash occured at qt5winextras.dll version 5.4.1.0 adress 0x00008009
Doesn't crash on Windows 7 and 8.1
Can this be Qt bug? How to fix this?
Updated
My code was similar to musicplayer example. I've compiled the musicplayer Qt's example and it also crashes.
Qt5.4.1\Examples\Qt-5.4\winextras\musicplayer
Also, musicplayer doesn't play music on Windows XP 32

Answer 1

I had a similar problem.
I think you should exec code (which related with winexras) only if windows version greater than XP.
I did something like this:
if(QSysInfo::windowsVersion >= QSysInfo::WV_VISTA)
{
taskbarButton = new QWinTaskbarButton(this);
taskbarButton->setWindow(windowHandle());
taskbarProgress = taskbarButton->progress();
connect(positionSlider, SIGNAL(valueChanged(int)), taskbarProgress, SLOT(setValue(int)));
connect(positionSlider, SIGNAL(rangeChanged(int,int)), taskbarProgress, SLOT(setRange(int,int)));
}