Program: 66776
Project: 66776
Buggy source:
public void widgetSelected(SelectionEvent e){
  if (e.widget.equals(btnSeriesDelete)) {
    updateColorRegistry(cmbSeriesSelect.getSelectionIndex());
    removeSeriesDefinition();
    setSeriesDeleteEnabled();
    int oldSelectedIndex=cmbSeriesSelect.getSelectionIndex();
    refreshSeriesCombo();
    if (oldSelectedIndex > cmbSeriesSelect.getItemCount() - 2) {
      oldSelectedIndex=cmbSeriesSelect.getItemCount() - 2;
    }
    cmbSeriesSelect.select(oldSelectedIndex);
    updateDataDefinition();
    refreshQuery();
    setSelectedSeriesIndex();
    ChartUIUtil.setSeriesName(wizardContext.getModel());
    selectDataUI.layoutAll();
  }
 else   if (e.widget.equals(cmbSeriesSelect)) {
    if (cmbSeriesSelect.getSelectionIndex() == cmbSeriesSelect.getItemCount() - 1 && !isPartChart()) {
      addNewSeriesDefinition();
      setSeriesDeleteEnabled();
      refreshSeriesCombo();
      cmbSeriesSelect.select(cmbSeriesSelect.getItemCount() - 2);
    }
    updateDataDefinition();
    refreshQuery();
    setSelectedSeriesIndex();
    selectDataUI.layoutAll();
  }
 else   if (e.widget.equals(cmbAxisSelect)) {
    if (cmbAxisSelect.getSelectionIndex() == cmbAxisSelect.getItemCount() - 1) {
      String currentDimension=ChartUIUtil.getDimensionString(getChart().getDimension());
      boolean isDimensionSupported=wizardContext.getChartType().isDimensionSupported(currentDimension,wizardContext,cmbAxisSelect.getItemCount(),0);
      if (!isDimensionSupported) {
        ChartAdapter.beginIgnoreNotifications();
        getChart().setDimension(ChartUIUtil.getDimensionType(wizardContext.getChartType().getDefaultDimension()));
        ChartAdapter.endIgnoreNotifications();
      }
      ChartUIUtil.addAxis((ChartWithAxes)getChart());
      setAxisDeleteEnabled();
      refreshAxisCombo();
      cmbAxisSelect.select(cmbAxisSelect.getItemCount() - 2);
    }
    axisIndex=cmbAxisSelect.getSelectionIndex();
    updateAllSeriesUnderAxis();
  }
 else   if (e.widget.equals(btnAxisDelete)) {
    updateColorRegistry(-1);
    ChartUIUtil.removeAxis(getChart(),axisIndex);
    setAxisDeleteEnabled();
    refreshAxisCombo();
    if (axisIndex > cmbAxisSelect.getItemCount() - 2) {
      axisIndex=cmbAxisSelect.getItemCount() - 2;
    }
    cmbAxisSelect.select(axisIndex);
    ChartUIUtil.setSeriesName(wizardContext.getModel());
    updateAllSeriesUnderAxis();
  }
  ChartUIUtil.checkAggregateType(wizardContext);
}

Fixed version (ground truth):
public void widgetSelected(SelectionEvent e){
  if (e.widget.equals(btnSeriesDelete)) {
    updateColorRegistry(cmbSeriesSelect.getSelectionIndex());
    removeSeriesDefinition();
    int oldSelectedIndex=cmbSeriesSelect.getSelectionIndex();
    refreshSeriesCombo();
    if (oldSelectedIndex > cmbSeriesSelect.getItemCount() - 2) {
      oldSelectedIndex=cmbSeriesSelect.getItemCount() - 2;
    }
    cmbSeriesSelect.select(oldSelectedIndex);
    updateDataDefinition();
    refreshQuery();
    setSelectedSeriesIndex();
    ChartUIUtil.setSeriesName(wizardContext.getModel());
    selectDataUI.layoutAll();
  }
 else   if (e.widget.equals(cmbSeriesSelect)) {
    if (cmbSeriesSelect.getSelectionIndex() == cmbSeriesSelect.getItemCount() - 1 && !isPartChart()) {
      addNewSeriesDefinition();
      refreshSeriesCombo();
      cmbSeriesSelect.select(cmbSeriesSelect.getItemCount() - 2);
    }
    updateDataDefinition();
    refreshQuery();
    setSelectedSeriesIndex();
    selectDataUI.layoutAll();
  }
 else   if (e.widget.equals(cmbAxisSelect)) {
    if (cmbAxisSelect.getSelectionIndex() == cmbAxisSelect.getItemCount() - 1) {
      String currentDimension=ChartUIUtil.getDimensionString(getChart().getDimension());
      boolean isDimensionSupported=wizardContext.getChartType().isDimensionSupported(currentDimension,wizardContext,cmbAxisSelect.getItemCount(),0);
      if (!isDimensionSupported) {
        ChartAdapter.beginIgnoreNotifications();
        getChart().setDimension(ChartUIUtil.getDimensionType(wizardContext.getChartType().getDefaultDimension()));
        ChartAdapter.endIgnoreNotifications();
      }
      ChartUIUtil.addAxis((ChartWithAxes)getChart());
      refreshAxisCombo();
      cmbAxisSelect.select(cmbAxisSelect.getItemCount() - 2);
    }
    axisIndex=cmbAxisSelect.getSelectionIndex();
    updateAllSeriesUnderAxis();
  }
 else   if (e.widget.equals(btnAxisDelete)) {
    updateColorRegistry(-1);
    ChartUIUtil.removeAxis(getChart(),axisIndex);
    refreshAxisCombo();
    if (axisIndex > cmbAxisSelect.getItemCount() - 2) {
      axisIndex=cmbAxisSelect.getItemCount() - 2;
    }
    cmbAxisSelect.select(axisIndex);
    ChartUIUtil.setSeriesName(wizardContext.getModel());
    updateAllSeriesUnderAxis();
  }
  setAxisDeleteEnabled();
  setSeriesDeleteEnabled();
  ChartUIUtil.checkAggregateType(wizardContext);
}