Program: 164490
Project: 164490
Buggy source:
private void fetchNotifications(){
  ApiClient.getService().getNotifications(new Callback<NotificationResponse>(){
    @Override public void success(    NotificationResponse notificationResponse,    Response response){
      if (notificationResponse != null && notificationResponse.data != null) {
        app.getSql().insertNotifications(notificationResponse);
        List<ImgurNotification> notifications=app.getSql().getNotifications();
        if (notifications.isEmpty() && (mAdapter == null || mAdapter.isEmpty())) {
          mMultiView.setViewState(MultiStateView.ViewState.EMPTY);
        }
 else {
          if (mAdapter != null) {
            mAdapter.addItems(notifications);
          }
 else {
            mAdapter=new NotificationAdapter(NotificationActivity.this,notifications,NotificationActivity.this);
            mList.setAdapter(mAdapter);
          }
          mMultiView.setViewState(MultiStateView.ViewState.CONTENT);
        }
      }
 else {
        mMultiView.setErrorText(R.id.errorMessage,R.string.error_generic);
        mMultiView.setViewState(MultiStateView.ViewState.ERROR);
      }
    }
    @Override public void failure(    RetrofitError error){
      if (mAdapter == null || mAdapter.isEmpty()) {
        mMultiView.setErrorText(R.id.errorMessage,ApiClient.getErrorCode(error));
        mMultiView.setViewState(MultiStateView.ViewState.ERROR);
      }
 else {
        SnackBar.show(NotificationActivity.this,ApiClient.getErrorCode(error));
        mMultiView.setViewState(MultiStateView.ViewState.CONTENT);
      }
    }
  }
);
}

Fixed version (ground truth):
private void fetchNotifications(){
  ApiClient.getService().getNotifications(new Callback<NotificationResponse>(){
    @Override public void success(    NotificationResponse notificationResponse,    Response response){
      if (notificationResponse != null && notificationResponse.data != null) {
        app.getSql().insertNotifications(notificationResponse);
        List<ImgurNotification> notifications=app.getSql().getNotifications();
        if (notifications.isEmpty() && (mAdapter == null || mAdapter.isEmpty())) {
          mMultiView.setViewState(MultiStateView.VIEW_STATE_EMPTY);
        }
 else {
          if (mAdapter != null) {
            mAdapter.addItems(notifications);
          }
 else {
            mAdapter=new NotificationAdapter(NotificationActivity.this,notifications,NotificationActivity.this);
            mList.setAdapter(mAdapter);
          }
          mMultiView.setViewState(MultiStateView.VIEW_STATE_CONTENT);
        }
      }
 else {
        mMultiView.setErrorText(R.id.errorMessage,R.string.error_generic);
        mMultiView.setViewState(MultiStateView.VIEW_STATE_ERROR);
      }
    }
    @Override public void failure(    RetrofitError error){
      if (mAdapter == null || mAdapter.isEmpty()) {
        mMultiView.setErrorText(R.id.errorMessage,ApiClient.getErrorCode(error));
        mMultiView.setViewState(MultiStateView.VIEW_STATE_ERROR);
      }
 else {
        SnackBar.show(NotificationActivity.this,ApiClient.getErrorCode(error));
        mMultiView.setViewState(MultiStateView.VIEW_STATE_CONTENT);
      }
    }
  }
);
}