Program: 67881
Project: 67881
Buggy source:
public boolean onBroughtToTop(IReportEditorPage prePage){
  if (getEditorInput() != prePage.getEditorInput()) {
    setInput(prePage.getEditorInput());
  }
  if (getStaleType() == IPageStaleType.MODEL_RELOAD) {
    reloadEditorInput();
    doSave(null);
  }
  ModuleHandle newModel=getModel();
  if (newModel != null && model != null && model != newModel) {
    hookModelEventManager(newModel);
    markPageStale(IPageStaleType.NONE);
    SessionHandleAdapter.getInstance().resetReportDesign(model,newModel);
    unhookModelEventManager(model);
    model=newModel;
    SessionHandleAdapter.getInstance().setReportDesignHandle(newModel);
    if (jsEditor instanceof JSEditor) {
      ((JSEditor)jsEditor).connectRoot(newModel);
    }
    IMediatorState state=SessionHandleAdapter.getInstance().getMediator(newModel).getCurrentState();
    ReportRequest request=new ReportRequest(state.getSource());
    List list=new ArrayList();
    list.add(newModel);
    request.setSelectionObject(list);
    request.setType(ReportRequest.SELECTION);
    SessionHandleAdapter.getInstance().getMediator().notifyRequest(request);
    previouPage=prePage;
    jsEditor.setFocus();
    return true;
  }
  jsEditor.setFocus();
  previouPage=prePage;
  IMediatorState state=SessionHandleAdapter.getInstance().getMediator().getCurrentState();
  ReportRequest request=new ReportRequest(state.getSource());
  List list=new ArrayList(state.getSelectionObject());
  if (list.isEmpty()) {
    list.add(new Object());
  }
  request.setSelectionObject(list);
  request.setType(ReportRequest.SELECTION);
  SessionHandleAdapter.getInstance().getMediator().notifyRequest(request);
  return true;
}

Fixed version (ground truth):
public boolean onBroughtToTop(IReportEditorPage prePage){
  if (prePage == this) {
    return true;
  }
  if (getEditorInput() != prePage.getEditorInput()) {
    setInput(prePage.getEditorInput());
  }
  if (getStaleType() == IPageStaleType.MODEL_RELOAD) {
    reloadEditorInput();
    doSave(null);
  }
  ModuleHandle newModel=getModel();
  if (newModel != null && model != null && model != newModel) {
    hookModelEventManager(newModel);
    markPageStale(IPageStaleType.NONE);
    SessionHandleAdapter.getInstance().resetReportDesign(model,newModel);
    unhookModelEventManager(model);
    model=newModel;
    SessionHandleAdapter.getInstance().setReportDesignHandle(newModel);
    if (jsEditor instanceof JSEditor) {
      ((JSEditor)jsEditor).connectRoot(newModel);
    }
    IMediatorState state=SessionHandleAdapter.getInstance().getMediator(newModel).getCurrentState();
    ReportRequest request=new ReportRequest(state.getSource());
    List list=new ArrayList();
    list.add(newModel);
    request.setSelectionObject(list);
    request.setType(ReportRequest.SELECTION);
    SessionHandleAdapter.getInstance().getMediator().notifyRequest(request);
    previouPage=prePage;
    jsEditor.setFocus();
    return true;
  }
  jsEditor.setFocus();
  previouPage=prePage;
  IMediatorState state=SessionHandleAdapter.getInstance().getMediator().getCurrentState();
  ReportRequest request=new ReportRequest(state.getSource());
  List list=new ArrayList(state.getSelectionObject());
  if (list.isEmpty()) {
    list.add(new Object());
  }
  request.setSelectionObject(list);
  request.setType(ReportRequest.SELECTION);
  SessionHandleAdapter.getInstance().getMediator().notifyRequest(request);
  return true;
}