Program: 67133
Project: 67133
Buggy source:
private void maintainCompatibility(Chart cm){
  ChartUtil.reviseVersion(cm);
  if (cm.getInteractivity() == null) {
    Interactivity interactivity=InteractivityImpl.create();
    interactivity.eAdapters().addAll(cm.eAdapters());
    cm.setInteractivity(interactivity);
  }
  if (cm.getLegend().getSeparator() == null) {
    LineAttributes separator=LineAttributesImpl.create(ColorDefinitionImpl.BLACK(),LineStyle.SOLID_LITERAL,1);
    separator.setVisible(true);
    separator.eAdapters().addAll(cm.eAdapters());
    cm.getLegend().setSeparator(separator);
  }
  if (cm.getExtendedProperties().isEmpty()) {
    ChartModelHelper.instance().updateExtendedProperties(cm.getExtendedProperties());
  }
}

Fixed version (ground truth):
private void maintainCompatibility(Chart cm){
  ChartUtil.reviseVersion(cm);
  if (cm.getInteractivity() == null) {
    Interactivity interactivity=InteractivityImpl.create();
    interactivity.eAdapters().addAll(cm.eAdapters());
    cm.setInteractivity(interactivity);
  }
  if (cm.getLegend().getSeparator() == null) {
    LineAttributes separator=LineAttributesImpl.create(ColorDefinitionImpl.BLACK(),LineStyle.SOLID_LITERAL,1);
    separator.setVisible(true);
    separator.eAdapters().addAll(cm.eAdapters());
    cm.getLegend().setSeparator(separator);
  }
  if (cm.getExtendedProperties().isEmpty()) {
    ChartModelHelper.instance().updateExtendedProperties(cm.getExtendedProperties());
  }
  if (cm.getSampleData() == null) {
    SampleData sampleData=DataFactory.eINSTANCE.createSampleData();
    sampleData.getBaseSampleData().clear();
    sampleData.getOrthogonalSampleData().clear();
    if (cm instanceof ChartWithoutAxes) {
      BaseSampleData sdBase=DataFactory.eINSTANCE.createBaseSampleData();
      sdBase.setDataSetRepresentation(ChartUtil.getNewSampleData(AxisType.TEXT_LITERAL,0));
      sampleData.getBaseSampleData().add(sdBase);
      for (int i=0; i < ChartUtil.getAllOrthogonalSeriesDefinitions(cm).size(); i++) {
        OrthogonalSampleData oSample=DataFactory.eINSTANCE.createOrthogonalSampleData();
        oSample.setDataSetRepresentation(ChartUtil.getNewSampleData(AxisType.LINEAR_LITERAL,i));
        oSample.setSeriesDefinitionIndex(i);
        sampleData.getOrthogonalSampleData().add(oSample);
      }
    }
 else     if (cm instanceof ChartWithAxes) {
      ChartWithAxes chart=(ChartWithAxes)cm;
      BaseSampleData sdBase=DataFactory.eINSTANCE.createBaseSampleData();
      sdBase.setDataSetRepresentation(ChartUtil.getNewSampleData(ChartUIUtil.getAxisXForProcessing(chart).getType(),0));
      sampleData.getBaseSampleData().add(sdBase);
      int i=0;
      for (      Axis axis : ChartUIUtil.getAxisXForProcessing(chart).getAssociatedAxes()) {
        for (        SeriesDefinition sd : axis.getSeriesDefinitions()) {
          OrthogonalSampleData oSample=DataFactory.eINSTANCE.createOrthogonalSampleData();
          oSample.setDataSetRepresentation(ChartUtil.getNewSampleData(axis.getType(),i));
          oSample.setSeriesDefinitionIndex(i);
          sampleData.getOrthogonalSampleData().add(oSample);
          i++;
        }
      }
    }
    cm.setSampleData(sampleData);
  }
}