Program: 65500
Project: 65500
Buggy source:
public boolean performDrop(Object transfer,Object target,int operation,DNDLocation location){
  if (target instanceof EditPart) {
    EditPart targetPart=(EditPart)target;
    CrosstabReportItemHandle crosstab=getCrosstab(targetPart);
    if (crosstab == null) {
      return false;
    }
    CommandStack cmdStack=crosstab.getModuleHandle().getCommandStack();
    cmdStack.startTrans(Messages.getFormattedString("String_Node_Str",new String[]{((ReportElementHandle)transfer).getName()}));
    ReportElementHandle extendedData=adapter.getBoundExtendedData((ReportItemHandle)crosstab.getModelHandle());
    if (extendedData == null || !extendedData.equals(adapter.resolveExtendedData((ReportElementHandle)transfer))) {
      if (!adapter.setExtendedData((ReportItemHandle)crosstab.getModelHandle(),adapter.resolveExtendedData((ReportElementHandle)transfer))) {
        cmdStack.rollback();
        return false;
      }
    }
    List validElements=handleValidate(targetPart,transfer);
    MeasureHandle measure=null;
    TabularDimensionHandle tabularDimension=null;
    TimeDimensionHandle timeDimension=null;
    for (    Object obj : validElements) {
      if (obj instanceof MeasureHandle) {
        measure=(MeasureHandle)obj;
      }
 else       if (obj instanceof TabularDimensionHandle) {
        tabularDimension=(TabularDimensionHandle)obj;
      }
 else       if (obj instanceof TimeDimensionHandle) {
        timeDimension=(TimeDimensionHandle)obj;
      }
    }
    if (measure != null) {
      CreateRequest request=new CreateRequest();
      request.getExtendedData().put(DesignerConstants.KEY_NEWOBJECT,measure);
      request.setLocation(location.getPoint());
      Command command=targetPart.getCommand(request);
      if (command != null && command.canExecute()) {
        targetPart.getViewer().getEditDomain().getCommandStack().execute(command);
        AggregationCellProviderWrapper providerWrapper=new AggregationCellProviderWrapper(crosstab);
        providerWrapper.updateAllAggregationCells(AggregationCellViewAdapter.SWITCH_VIEW_TYPE);
        if (crosstab.getDimensionCount(ICrosstabConstants.COLUMN_AXIS_TYPE) != 0) {
          DimensionViewHandle viewHnadle=crosstab.getDimension(ICrosstabConstants.COLUMN_AXIS_TYPE,crosstab.getDimensionCount(ICrosstabConstants.COLUMN_AXIS_TYPE) - 1);
          CrosstabUtil.addLabelToHeader(viewHnadle.getLevel(viewHnadle.getLevelCount() - 1));
        }
        cmdStack.commit();
        return true;
      }
    }
 else     if (tabularDimension != null || timeDimension != null) {
      Object element=null;
      if (timeDimension != null) {
        LevelViewDialog dialog=new LevelViewDialog(false);
        dialog.setInput(timeDimension,adapter.getLevelHints(timeDimension));
        if (dialog.open() != Window.OK) {
          cmdStack.rollback();
          return false;
        }
        if (((List)dialog.getResult()).size() > 0) {
          element=((List)dialog.getResult()).toArray();
        }
 else {
          element=tabularDimension;
        }
      }
 else       if (tabularDimension != null) {
        element=tabularDimension;
      }
      if (element == null) {
        return false;
      }
      CreateRequest request=new CreateRequest();
      request.getExtendedData().put(DesignerConstants.KEY_NEWOBJECT,element);
      request.setLocation(location.getPoint());
      Command command=targetPart.getCommand(request);
      if (command != null && command.canExecute()) {
        targetPart.getViewer().getEditDomain().getCommandStack().execute(command);
        AggregationCellProviderWrapper providerWrapper=new AggregationCellProviderWrapper(crosstab);
        providerWrapper.updateAllAggregationCells(AggregationCellViewAdapter.SWITCH_VIEW_TYPE);
        cmdStack.commit();
        return true;
      }
    }
  }
  return false;
}

Fixed version (ground truth):
public boolean performDrop(Object transfer,Object target,int operation,DNDLocation location){
  if (target instanceof EditPart) {
    EditPart targetPart=(EditPart)target;
    CrosstabReportItemHandle crosstab=getCrosstab(targetPart);
    if (crosstab == null) {
      return false;
    }
    CommandStack cmdStack=crosstab.getModuleHandle().getCommandStack();
    cmdStack.startTrans(Messages.getFormattedString("String_Node_Str",new String[]{((ReportElementHandle)transfer).getName()}));
    ReportElementHandle extendedData=adapter.getBoundExtendedData((ReportItemHandle)crosstab.getModelHandle());
    if (extendedData == null || !extendedData.equals(adapter.resolveExtendedData((ReportElementHandle)transfer))) {
      if (!adapter.setExtendedData((ReportItemHandle)crosstab.getModelHandle(),adapter.resolveExtendedData((ReportElementHandle)transfer))) {
        cmdStack.rollback();
        return false;
      }
    }
    List validElements=handleValidate(targetPart,transfer);
    MeasureHandle measure=null;
    DimensionHandle tabularDimension=null;
    DimensionHandle timeDimension=null;
    for (    Object obj : validElements) {
      if (obj instanceof MeasureHandle) {
        measure=(MeasureHandle)obj;
      }
 else       if (obj instanceof DimensionHandle) {
        DimensionHandle dim=(DimensionHandle)obj;
        if (dim.isTimeType()) {
          timeDimension=dim;
        }
 else {
          tabularDimension=dim;
        }
      }
    }
    if (measure != null) {
      CreateRequest request=new CreateRequest();
      request.getExtendedData().put(DesignerConstants.KEY_NEWOBJECT,measure);
      request.setLocation(location.getPoint());
      Command command=targetPart.getCommand(request);
      if (command != null && command.canExecute()) {
        targetPart.getViewer().getEditDomain().getCommandStack().execute(command);
        AggregationCellProviderWrapper providerWrapper=new AggregationCellProviderWrapper(crosstab);
        providerWrapper.updateAllAggregationCells(AggregationCellViewAdapter.SWITCH_VIEW_TYPE);
        if (crosstab.getDimensionCount(ICrosstabConstants.COLUMN_AXIS_TYPE) != 0) {
          DimensionViewHandle viewHnadle=crosstab.getDimension(ICrosstabConstants.COLUMN_AXIS_TYPE,crosstab.getDimensionCount(ICrosstabConstants.COLUMN_AXIS_TYPE) - 1);
          CrosstabUtil.addLabelToHeader(viewHnadle.getLevel(viewHnadle.getLevelCount() - 1));
        }
        cmdStack.commit();
        return true;
      }
    }
 else     if (tabularDimension != null || timeDimension != null) {
      Object element=null;
      if (timeDimension != null) {
        LevelViewDialog dialog=new LevelViewDialog(false);
        dialog.setInput(timeDimension,adapter.getLevelHints(timeDimension));
        if (dialog.open() != Window.OK) {
          cmdStack.rollback();
          return false;
        }
        if (((List)dialog.getResult()).size() > 0) {
          element=((List)dialog.getResult()).toArray();
        }
 else {
          element=tabularDimension;
        }
      }
 else       if (tabularDimension != null) {
        element=tabularDimension;
      }
      if (element == null) {
        return false;
      }
      CreateRequest request=new CreateRequest();
      request.getExtendedData().put(DesignerConstants.KEY_NEWOBJECT,element);
      request.setLocation(location.getPoint());
      Command command=targetPart.getCommand(request);
      if (command != null && command.canExecute()) {
        targetPart.getViewer().getEditDomain().getCommandStack().execute(command);
        AggregationCellProviderWrapper providerWrapper=new AggregationCellProviderWrapper(crosstab);
        providerWrapper.updateAllAggregationCells(AggregationCellViewAdapter.SWITCH_VIEW_TYPE);
        cmdStack.commit();
        return true;
      }
    }
  }
  return false;
}