2 files changed, 9 insertions, 1 deletions
diff --git a/src/gui/styles/qstylesheetstyle.cpp b/src/gui/styles/qstylesheetstyle.cpp
index 285a789..0b615bc 100644
--- a/src/gui/styles/qstylesheetstyle.cpp
+++ b/src/gui/styles/qstylesheetstyle.cpp
@@ -1533,7 +1533,9 @@ QVector<QCss::StyleRule> QStyleSheetStyle::styleRules(const QWidget *w) const
     QHash<const void *, StyleSheet>::const_iterator defaultCacheIt = styleSheetCache->constFind(baseStyle());
     if (defaultCacheIt == styleSheetCache->constEnd()) {
         defaultSs = getDefaultStyleSheet();
-        styleSheetCache->insert(baseStyle(), defaultSs);
+        QStyle *bs = baseStyle();
+        styleSheetCache->insert(bs, defaultSs);
+        QObject::connect(bs, SIGNAL(destroyed(QObject*)), this, SLOT(styleDestroyed(QObject*)), Qt::UniqueConnection);
     } else {
         defaultSs = defaultCacheIt.value();
     }
@@ -2660,6 +2662,11 @@ void QStyleSheetStyle::widgetDestroyed(QObject *o)
     autoFillDisabledWidgets->remove((const QWidget *)o);
 }
 
+void QStyleSheetStyle::styleDestroyed(QObject *o)
+{
+    styleSheetCache->remove(o);
+}
+
 /*!
  *  Make sure that the cache will be clean by connecting destroyed if needed.
  *  return false if the widget is not stylable;
diff --git a/src/gui/styles/qstylesheetstyle_p.h b/src/gui/styles/qstylesheetstyle_p.h
index 50abef9..fd81437 100644
--- a/src/gui/styles/qstylesheetstyle_p.h
+++ b/src/gui/styles/qstylesheetstyle_p.h
@@ -147,6 +147,7 @@ protected:
 
 private Q_SLOTS:
     void widgetDestroyed(QObject *);
+    void styleDestroyed(QObject *);
 
 private:
     int refcount;