crash in QXmlStreamReaderPrivate::~QXmlStreamReaderPrivate()

Download file qt-everywhere-opensource-src-4.7.2.zip, extract, set %QTDIR%

open file %QTDIR%\mkspecs\win32-msvc2010\qmake.conf, change any -MD to -MT, change any -MDd to -MTd.

configure, nmake.

open %QTDIR%\tools\designer\designer.sln with VS 2010, compile, debug it.
then crashing.

file %QTDIR%\src\corelib\xml\qxmlstream.cpp

QXmlStreamReaderPrivate::~QXmlStreamReaderPrivate()
{
#ifndef QT_NO_TEXTCODEC
    delete decoder;        // <--- this line will crash. 
#endif
    qFree(sym_stack);
    qFree(state_stack);
    delete entityParser;
}