diff -r 5dc02b23752f -r 3e2da88830cd src/corelib/io/qdebug.h
--- a/src/corelib/io/qdebug.h	Tue Jul 06 15:10:48 2010 +0300
+++ b/src/corelib/io/qdebug.h	Wed Aug 18 10:37:55 2010 +0300
@@ -254,6 +254,29 @@
     return debug.space();
 }
 
+#if defined(FORCE_UREF)
+template <class T>
+inline QDebug &operator<<(QDebug debug, const QFlags<T> &flags)
+#else
+template <class T>
+inline QDebug operator<<(QDebug debug, const QFlags<T> &flags)
+#endif
+{
+    debug.nospace() << "QFlags(";
+    bool needSeparator = false;
+    for (uint i = 0; i < sizeof(T) * 8; ++i) {
+        if (flags.testFlag(T(1 << i))) {
+            if (needSeparator)
+                debug.nospace() << '|';
+            else
+                needSeparator = true;
+            debug.nospace() << "0x" << QByteArray::number(T(1 << i), 16).constData();
+        }
+    }
+    debug << ')';
+    return debug.space();
+}
+
 #if !defined(QT_NO_DEBUG_STREAM)
 Q_CORE_EXPORT_INLINE QDebug qDebug() { return QDebug(QtDebugMsg); }