diff -urN qt-win-commercial-src-4.5.1.orig/src/corelib/kernel/qpointer.h qt-win-commercial-src-4.5.1/src/corelib/kernel/qpointer.h
--- qt-win-commercial-src-4.5.1.orig/src/corelib/kernel/qpointer.h	2009-04-22 03:57:41.000000000 +0400
+++ qt-win-commercial-src-4.5.1/src/corelib/kernel/qpointer.h	2009-05-22 17:41:17.000000000 +0400
@@ -50,6 +50,18 @@
 
 QT_MODULE(Core)
 
+#ifndef QT_NO_EXCEPTIONS
+#include <stdexcept>
+ 
+class QPointerIsNull : public std::runtime_error {
+public:
+    QPointerIsNull()
+        : std::runtime_error("QPointerIsNull")
+    {
+    }
+};
+#endif
+
 template <class T>
 class QPointer
 {
@@ -71,9 +83,19 @@
         { return !o; }
 
     inline T* operator->() const
-        { return static_cast<T*>(const_cast<QObject*>(o)); }
+        {
+#ifndef QT_NO_EXCEPTIONS
+            if (isNull()) throw QPointerIsNull();
+#endif
+            return static_cast<T*>(const_cast<QObject*>(o));
+        }
     inline T& operator*() const
-        { return *static_cast<T*>(const_cast<QObject*>(o)); }
+        {
+#ifndef QT_NO_EXCEPTIONS
+            if (isNull()) throw QPointerIsNull();
+#endif
+            return *static_cast<T*>(const_cast<QObject*>(o));
+        }
     inline operator T*() const
         { return static_cast<T*>(const_cast<QObject*>(o)); }
     inline T* data() const
@@ -85,70 +107,70 @@
 
 template <class T>
 inline bool operator==(const T *o, const QPointer<T> &p)
-{ return o == p.operator->(); }
+{ return o == p.data(); }
 
 template<class T>
 inline bool operator==(const QPointer<T> &p, const T *o)
-{ return p.operator->() == o; }
+{ return p.data() == o; }
 
 #else
 
 template<class T>
 inline bool operator==(const void *o, const QPointer<T> &p)
-{ return o == p.operator->(); }
+{ return o == p.data(); }
 
 template<class T>
 inline bool operator==(const QPointer<T> &p, const void *o)
-{ return p.operator->() == o; }
+{ return p.data() == o; }
 
 #endif
 
 template <class T>
 inline bool operator==(T *o, const QPointer<T> &p)
-{ return o == p.operator->(); }
+{ return o == p.data(); }
 
 template<class T>
 inline bool operator==(const QPointer<T> &p, T *o)
-{ return p.operator->() == o; }
+{ return p.data() == o; }
 
 template<class T>
 inline bool operator==(const QPointer<T> &p1, const QPointer<T> &p2)
-{ return p1.operator->() == p2.operator->(); }
+{ return p1.data() == p2.data(); }
 
 
 #if (!defined(Q_CC_SUN) || (__SUNPRO_CC >= 0x580)) // ambiguity between const T * and T *
 
 template <class T>
 inline bool operator!=(const T *o, const QPointer<T> &p)
-{ return o != p.operator->(); }
+{ return o != p.data(); }
 
 template<class T>
 inline bool operator!= (const QPointer<T> &p, const T *o)
-{ return p.operator->() != o; }
+{ return p.data() != o; }
 
 #else
 
 template<class T>
 inline bool operator!= (const void *o, const QPointer<T> &p)
-{ return o != p.operator->(); }
+{ return o != p.data(); }
 
 template<class T>
 inline bool operator!= (const QPointer<T> &p, const void *o)
-{ return p.operator->() != o; }
+{ return p.data() != o; }
 
 #endif
 
 template <class T>
 inline bool operator!=(T *o, const QPointer<T> &p)
-{ return o != p.operator->(); }
+{ return o != p.data(); }
 
 template<class T>
 inline bool operator!= (const QPointer<T> &p, T *o)
-{ return p.operator->() != o; }
+{ return p.data() != o; }
 
 template<class T>
 inline bool operator!= (const QPointer<T> &p1, const QPointer<T> &p2)
-{ return p1.operator->() != p2.operator->() ; }
+{ return p1.data() != p2.data() ; }
 
 // Make MSVC < 1400 (2005) handle "if (NULL == p)" syntax
 #if defined(Q_CC_MSVC) && (_MSC_VER < 1400)