FPE Exception : FE_INVALID & Qt

#include <qapplication.h>
#include <qmainwindow.h>
#include <qlineedit.h>

#include <fenv.h>

int main(int argc,char** argv) {
  
  // ------------------------------------------------------
  // ENABLE FPE : Copy/Paste feenableexcept() code from glib
  // ------------------------------------------------------
  unsigned int excepts = FE_INVALID;
  static fenv_t fenv;
  unsigned int new_excepts = excepts & FE_ALL_EXCEPT,
  old_excepts;  // previous masks
  
  if ( fegetenv (&fenv) )  { return -1; }
  old_excepts = fenv.__control & FE_ALL_EXCEPT;
  
  // unmask
  //
  fenv.__control &= ~new_excepts;
  fenv.__mxcsr   &= ~(new_excepts << 7);
  
  int result =  ( fesetenv (&fenv) ? -1 : old_excepts );
  // ------------------------------------------------------

  // ------------------------------------------------------
  // Create a minimum window
  // ------------------------------------------------------
  QApplication application(argc, argv);
  QLineEdit edit;
  edit.show();

  // Will crash at the next line if you type "O" in the lineEdit
  // Will also crash for other random strings ;-)
  qApp->exec();
  
  return 0;
}