I am using Qt4.2.3 _eval with VS2005
The program can run properly, but when dubug, it comes here:

Qt Code: 
  1. int SLD::qt_metacall(QMetaObject::Call _c, int _id, void **_a)
  2. {
  3.     _id = QMainWindow::qt_metacall(_c, _id, _a);
  4.     if (_id < 0)
  5.         return _id;
  6.     if (_c == QMetaObject::InvokeMetaMethod) {
  7.         switch (_id) {
  8.         case 0: Trans((*reinterpret_cast< int(*)>(_a[1])),(*reinterpret_cast< int(*)>(_a[2])),(*reinterpret_cast< int(*)>(_a[3])),(*reinterpret_cast< int(*)>(_a[4]))); break;
  9.         case 1: on_actionShow_triggered(); break;
  10.         case 2: showTrans((*reinterpret_cast< int(*)>(_a[1])),(*reinterpret_cast< int(*)>(_a[2])),(*reinterpret_cast< int(*)>(_a[3])),(*reinterpret_cast< int(*)>(_a[4]))); break;
  11.         }
  12.         _id -= 3;
  13.     }
  14.     return _id;
  15. }
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It can run to the last brace, and then tells me:
"There is no source code available for the current location"
but the program can run properly, so what's wrong?