Glib::ustring

["Jamiil Abduqadir" <jalqadir gmail com>]

OS : MSWinXP
gcc: 3.4.2
gtk:  gtkmm-win32-devel-2.10.8-1
problem:  Glib::ustring


Assignment methods in Glib::ustring are giving me serious problems. Simple 
statements as:

class MC{
   Glib::ustring* str;
public:
   void method();
};
MC::method(){
   str =  new Glib::ustring("Nada");
   this->str = ""; //segmentation error
}
Or if I use  this->str->assign("") create a segmentation error,
gdb reports the error as follows:
Program received a signal SIGSEGV, segmentation fault.
in std::string::assign(std::string const&)()

Why am I getting this error and how can I resolve it?

Thanks in Advance