3 files changed, 23 insertions, 6 deletions
diff --git a/src/kernel/qapplication.cpp b/src/kernel/qapplication.cpp
index 83d8b6c58..73b2e44d6 100644
--- a/src/kernel/qapplication.cpp
+++ b/src/kernel/qapplication.cpp
@@ -3732,7 +3732,7 @@ void TQApplication::removePostedEvent( TQEvent *  event )
 void tqThreadTerminationHandlerRecursive( TQObject* object, TQThread* originThread, TQThread* destinationThread ) {
 #ifdef QT_THREAD_SUPPORT
 	TQThread* objectThread = object->contextThreadObject();
-	if (objectThread && (objectThread != destinationThread)) {
+	if (objectThread && (objectThread == originThread)) {
 		TQThread::CleanupType cleanupType = objectThread->cleanupType();
 		if (cleanupType == TQThread::CleanupMergeObjects) {
 			object->moveToThread(destinationThread);
diff --git a/src/tools/qstring.cpp b/src/tools/qstring.cpp
index 1ea356933..f7b5c233d 100644
--- a/src/tools/qstring.cpp
+++ b/src/tools/qstring.cpp
@@ -1071,13 +1071,20 @@ TQStringData::TQStringData(TQChar *u, uint l, uint m) : TQShared(),
 }
 
 TQStringData::~TQStringData() {
-	if ( unicode ) delete[] ((char*)unicode);
+	if ( unicode ) {
+		delete[] ((char*)unicode);
+	}
 	if ( ascii && security_unpaged ) {
 		munlock(ascii, LINUX_MEMLOCK_LIMIT_BYTES);
 	}
-	if ( ascii ) delete[] ascii;
+	if ( ascii ) {
+		delete[] ascii;
+	}
 #ifdef QT_THREAD_SUPPORT
-	if ( mutex ) delete mutex;
+	if ( mutex ) {
+		delete mutex;
+		mutex = NULL;
+	}
 #endif // QT_THREAD_SUPPORT
 }
 
@@ -1675,6 +1682,13 @@ TQString::TQString( TQStringData* dd, bool /* dummy */ ) {
 
 TQString::~TQString()
 {
+#if defined(QT_CHECK_RANGE)
+	if (!d) {
+		tqWarning( "TQString::~TQString: Double free or delete detected!" );
+		return;
+	}
+#endif
+
 #ifdef QT_THREAD_SUPPORT
 	d->mutex->lock();
 #endif // QT_THREAD_SUPPORT
@@ -1684,6 +1698,7 @@ TQString::~TQString()
 			d->mutex->unlock();
 #endif // QT_THREAD_SUPPORT
 			d->deleteSelf();
+			d = NULL;
 		}
 		else {
 #ifdef QT_THREAD_SUPPORT
diff --git a/src/widgets/qlistview.cpp b/src/widgets/qlistview.cpp
index 42aebfbe6..79d338120 100644
--- a/src/widgets/qlistview.cpp
+++ b/src/widgets/qlistview.cpp
@@ -5181,11 +5181,13 @@ void TQListView::keyPressEvent( TQKeyEvent * e )
 
 TQListViewItem * TQListView::itemAt( const TQPoint & viewPos ) const
 {
-    if ( viewPos.x() > contentsWidth() - contentsX() )
+    if ( viewPos.x() > contentsWidth() - contentsX() ) {
 	return 0;
+    }
 
-    if ( !d->drawables || d->drawables->isEmpty() )
+    if ( !d->drawables || d->drawables->isEmpty() ) {
 	buildDrawableList();
+    }
 
     TQListViewPrivate::DrawableItem * c = d->drawables->first();
     int g = viewPos.y() + contentsY();