Merge remote branch 'origin/4.6' into qt-4.7-from-4.6

Conflicts:
	qmake/generators/symbian/symmake.cpp
	src/gui/image/qimage.cpp
	src/openvg/qwindowsurface_vgegl.cpp

1 files changed, 8 insertions, 6 deletions

diff --git a/src/gui/widgets/qmenu.cpp b/src/gui/widgets/qmenu.cpp
index 404d46e..9e190b7 100644
--- a/src/gui/widgets/qmenu.cpp
+++ b/src/gui/widgets/qmenu.cpp
@@ -1398,12 +1398,14 @@ QMenu::QMenu(QMenuPrivate &dd, QWidget *parent)
 QMenu::~QMenu()
 {
     Q_D(QMenu);
-    QHash<QAction *, QWidget *>::iterator it = d->widgetItems.begin();
-    for (; it != d->widgetItems.end(); ++it) {
-        if (QWidget *widget = it.value()) {
-            QWidgetAction *action = static_cast<QWidgetAction *>(it.key());
-            action->releaseWidget(widget);
-            *it = 0;
+    if (!d->widgetItems.isEmpty()) {  // avoid detach on shared null hash
+        QHash<QAction *, QWidget *>::iterator it = d->widgetItems.begin();
+        for (; it != d->widgetItems.end(); ++it) {
+            if (QWidget *widget = it.value()) {
+                QWidgetAction *action = static_cast<QWidgetAction *>(it.key());
+                action->releaseWidget(widget);
+                *it = 0;
+            }
         }
     }