Program: 58959
Project: 58959
Buggy source:
@Override public synchronized void displayLocal(final GL gl){
  if ((pickingTriggerMouseAdapter.wasRightMouseButtonPressed() && !bucketMouseWheelListener.isZoomedIn()) && !(layoutRenderStyle instanceof ListLayoutRenderStyle)) {
    bEnableNavigationOverlay=!bEnableNavigationOverlay;
    if (glConnectionLineRenderer != null)     glConnectionLineRenderer.enableRendering(!bEnableNavigationOverlay);
  }
  pickingManager.handlePicking(iUniqueID,gl,true);
  display(gl);
  if (eBusyModeState != EBusyModeState.OFF)   renderBusyMode(gl);
  if (pickingTriggerMouseAdapter.getPickedPoint() != null)   dragAndDrop.setCurrentMousePos(gl,pickingTriggerMouseAdapter.getPickedPoint());
  if (dragAndDrop.isDragActionRunning()) {
    dragAndDrop.renderDragThumbnailTexture(gl);
  }
  if (pickingTriggerMouseAdapter.wasMouseReleased() && dragAndDrop.isDragActionRunning()) {
    int iDraggedObjectId=dragAndDrop.getDraggedObjectedId();
    if (!RemoteElementManager.get().hasItem(iMouseOverObjectID) || !selectionLevel.containsElement(RemoteElementManager.get().getItem(iMouseOverObjectID))) {
      RemoteLevelElement mouseOverElement=null;
      if (iMouseOverObjectID == iPoolLevelCommonID) {
        mouseOverElement=poolLevel.getNextFree();
      }
 else       if (mouseOverElement == null && iMouseOverObjectID != iDraggedObjectId) {
        mouseOverElement=RemoteElementManager.get().getItem(iMouseOverObjectID);
      }
      if (mouseOverElement != null) {
        RemoteLevelElement originElement=RemoteElementManager.get().getItem(iDraggedObjectId);
        int iMouseOverElementID=mouseOverElement.getContainedElementID();
        int iOriginElementID=originElement.getContainedElementID();
        mouseOverElement.setContainedElementID(iOriginElementID);
        originElement.setContainedElementID(iMouseOverElementID);
        IViewManager viewGLCanvasManager=generalManager.getViewGLCanvasManager();
        AGLEventListener originView=viewGLCanvasManager.getGLEventListener(iOriginElementID);
        if (originView != null)         originView.setRemoteLevelElement(mouseOverElement);
        AGLEventListener mouseOverView=viewGLCanvasManager.getGLEventListener(iMouseOverElementID);
        if (mouseOverView != null)         mouseOverView.setRemoteLevelElement(originElement);
        updateViewDetailLevels(originElement);
        updateViewDetailLevels(mouseOverElement);
        if (mouseOverElement.getContainedElementID() != -1) {
          if (poolLevel.containsElement(originElement) && (stackLevel.containsElement(mouseOverElement) || focusLevel.containsElement(mouseOverElement))) {
            generalManager.getViewGLCanvasManager().getGLEventListener(mouseOverElement.getContainedElementID()).broadcastElements(EVAOperation.APPEND_UNIQUE);
          }
          if (poolLevel.containsElement(mouseOverElement) && (stackLevel.containsElement(originElement) || focusLevel.containsElement(originElement))) {
            generalManager.getViewGLCanvasManager().getGLEventListener(mouseOverElement.getContainedElementID()).broadcastElements(EVAOperation.REMOVE_ELEMENT);
          }
        }
      }
    }
    dragAndDrop.stopDragAction();
    bUpdateOffScreenTextures=true;
  }
  checkForHits(gl);
  pickingTriggerMouseAdapter.resetEvents();
}

Fixed version (ground truth):
@Override public synchronized void displayLocal(final GL gl){
  if ((pickingTriggerMouseAdapter.wasRightMouseButtonPressed() && !bucketMouseWheelListener.isZoomedIn()) && !(layoutRenderStyle instanceof ListLayoutRenderStyle)) {
    bEnableNavigationOverlay=!bEnableNavigationOverlay;
    if (glConnectionLineRenderer != null)     glConnectionLineRenderer.enableRendering(!bEnableNavigationOverlay);
  }
  pickingManager.handlePicking(iUniqueID,gl,true);
  display(gl);
  if (eBusyModeState != EBusyModeState.OFF)   renderBusyMode(gl);
  if (pickingTriggerMouseAdapter.getPickedPoint() != null)   dragAndDrop.setCurrentMousePos(gl,pickingTriggerMouseAdapter.getPickedPoint());
  if (dragAndDrop.isDragActionRunning()) {
    dragAndDrop.renderDragThumbnailTexture(gl);
  }
  if (pickingTriggerMouseAdapter.wasMouseReleased() && dragAndDrop.isDragActionRunning()) {
    int iDraggedObjectId=dragAndDrop.getDraggedObjectedId();
    if (!RemoteElementManager.get().hasItem(iMouseOverObjectID) || !selectionLevel.containsElement(RemoteElementManager.get().getItem(iMouseOverObjectID))) {
      RemoteLevelElement mouseOverElement=null;
      if (iMouseOverObjectID == iPoolLevelCommonID) {
        mouseOverElement=poolLevel.getNextFree();
      }
 else       if (mouseOverElement == null && iMouseOverObjectID != iDraggedObjectId) {
        mouseOverElement=RemoteElementManager.get().getItem(iMouseOverObjectID);
      }
      if (mouseOverElement != null) {
        RemoteLevelElement originElement=RemoteElementManager.get().getItem(iDraggedObjectId);
        int iMouseOverElementID=mouseOverElement.getContainedElementID();
        int iOriginElementID=originElement.getContainedElementID();
        mouseOverElement.setContainedElementID(iOriginElementID);
        originElement.setContainedElementID(iMouseOverElementID);
        IViewManager viewGLCanvasManager=generalManager.getViewGLCanvasManager();
        AGLEventListener originView=viewGLCanvasManager.getGLEventListener(iOriginElementID);
        if (originView != null)         originView.setRemoteLevelElement(mouseOverElement);
        AGLEventListener mouseOverView=viewGLCanvasManager.getGLEventListener(iMouseOverElementID);
        if (mouseOverView != null)         mouseOverView.setRemoteLevelElement(originElement);
        updateViewDetailLevels(originElement);
        updateViewDetailLevels(mouseOverElement);
        if (mouseOverElement.getContainedElementID() != -1) {
          if (poolLevel.containsElement(originElement) && (stackLevel.containsElement(mouseOverElement) || focusLevel.containsElement(mouseOverElement))) {
            generalManager.getViewGLCanvasManager().getGLEventListener(mouseOverElement.getContainedElementID()).broadcastElements(EVAOperation.APPEND_UNIQUE);
          }
          if (poolLevel.containsElement(mouseOverElement) && (stackLevel.containsElement(originElement) || focusLevel.containsElement(originElement))) {
            generalManager.getViewGLCanvasManager().getGLEventListener(mouseOverElement.getContainedElementID()).broadcastElements(EVAOperation.REMOVE_ELEMENT);
          }
        }
      }
    }
    dragAndDrop.stopDragAction();
    bUpdateOffScreenTextures=true;
  }
  checkForHits(gl);
}