Program: 73924
Project: 73924
Buggy source:
public Object execute(ExecutionEvent event) throws ExecutionException {
  SessionHandleAdapter.getInstance().getReportDesignHandle().getCommandStack().startTrans(Messages.getString("String_Node_Str"));
  ExtendedItemHandle handle=null;
  try {
    handle=CrosstabExtendedItemFactory.createCrosstabReportItem(SessionHandleAdapter.getInstance().getReportDesignHandle(),null);
  }
 catch (  Exception e) {
    SessionHandleAdapter.getInstance().getReportDesignHandle().getCommandStack().rollback();
    throw new ExecutionException(e.getLocalizedMessage(),e);
  }
  IEvaluationContext context=(IEvaluationContext)event.getApplicationContext();
  EditPart targetEditPart=(EditPart)context.getVariable("String_Node_Str");
  if (targetEditPart == null) {
    targetEditPart=UIUtil.getCurrentEditPart();
  }
  Object parentModel=DNDUtil.unwrapToModel(targetEditPart.getModel());
  CreateRequest request=(CreateRequest)context.getVariable("String_Node_Str");
  if (request != null) {
    request.getExtendedData().put(DesignerConstants.KEY_NEWOBJECT,handle);
    try {
      targetEditPart.getCommand(request).execute();
      SessionHandleAdapter.getInstance().getReportDesignHandle().getCommandStack().commit();
    }
 catch (    Exception e) {
      SessionHandleAdapter.getInstance().getReportDesignHandle().getCommandStack().rollback();
    }
  }
 else {
    Map map=new HashMap();
    map.put(DesignerConstants.KEY_NEWOBJECT,handle);
    CreateCommand command=new CreateCommand(map);
    try {
      if (parentModel instanceof DesignElementHandle) {
        DesignElementHandle parentHandle=(DesignElementHandle)parentModel;
        if (parentHandle.getDefn().isContainer() && (parentHandle.canContain(DEUtil.getDefaultSlotID(parentHandle),handle) || parentHandle.canContain(DEUtil.getDefaultContentName(parentHandle),handle))) {
          command.setParent(parentHandle);
        }
 else {
          if (parentHandle.getContainerSlotHandle() != null) {
            command.setAfter(parentHandle.getContainerSlotHandle().get(parentHandle.getIndex() + 1));
          }
 else           if (parentHandle.getContainerPropertyHandle() != null) {
            command.setAfter(parentHandle.getContainerPropertyHandle().get(parentHandle.getIndex() + 1));
          }
          command.setParent(parentHandle.getContainer());
        }
      }
 else {
        command.setParent(SessionHandleAdapter.getInstance().getReportDesignHandle());
      }
      command.execute();
      SessionHandleAdapter.getInstance().getReportDesignHandle().getCommandStack().commit();
    }
 catch (    Exception e) {
      SessionHandleAdapter.getInstance().getReportDesignHandle().getCommandStack().rollback();
    }
  }
  if (parentModel instanceof LibraryHandle) {
    try {
      HandleAdapterFactory.getInstance().getLibraryHandleAdapter().setCurrentEditorModel(handle,LibraryHandleAdapter.CREATE_ELEMENT);
    }
 catch (    Exception e) {
    }
  }
  return handle;
}

Fixed version (ground truth):
public Object execute(ExecutionEvent event) throws ExecutionException {
  SessionHandleAdapter.getInstance().getReportDesignHandle().getCommandStack().startTrans(Messages.getString("String_Node_Str"));
  ExtendedItemHandle handle=null;
  try {
    handle=CrosstabExtendedItemFactory.createCrosstabReportItem(SessionHandleAdapter.getInstance().getReportDesignHandle(),null);
  }
 catch (  Exception e) {
    SessionHandleAdapter.getInstance().getReportDesignHandle().getCommandStack().rollback();
    throw new ExecutionException(e.getLocalizedMessage(),e);
  }
  IEvaluationContext context=(IEvaluationContext)event.getApplicationContext();
  EditPart targetEditPart=(EditPart)context.getVariable("String_Node_Str");
  if (targetEditPart == null) {
    targetEditPart=UIUtil.getCurrentEditPart();
  }
  Object parentModel=DNDUtil.unwrapToModel(targetEditPart.getModel());
  CreateRequest request=(CreateRequest)context.getVariable("String_Node_Str");
  if (request != null) {
    request.getExtendedData().put(DesignerConstants.KEY_NEWOBJECT,handle);
    try {
      targetEditPart.getCommand(request).execute();
      SessionHandleAdapter.getInstance().getReportDesignHandle().getCommandStack().commit();
    }
 catch (    Exception e) {
      SessionHandleAdapter.getInstance().getReportDesignHandle().getCommandStack().rollback();
    }
  }
 else {
    Map map=new HashMap();
    map.put(DesignerConstants.KEY_NEWOBJECT,handle);
    CreateCommand command=new CreateCommand(map);
    try {
      if (parentModel instanceof DesignElementHandle) {
        DesignElementHandle parentHandle=(DesignElementHandle)parentModel;
        if (parentHandle.getDefn().isContainer() && (parentHandle.canContain(DEUtil.getDefaultSlotID(parentHandle),handle) || parentHandle.canContain(DEUtil.getDefaultContentName(parentHandle),handle))) {
          command.setParent(parentHandle);
        }
 else {
          if (parentHandle.getContainerSlotHandle() != null) {
            command.setAfter(parentHandle.getContainerSlotHandle().get(parentHandle.getIndex() + 1));
          }
 else           if (parentHandle.getContainerPropertyHandle() != null) {
            command.setAfter(parentHandle.getContainerPropertyHandle().get(parentHandle.getIndex() + 1));
          }
          DesignElementHandle container=parentHandle.getContainer();
          if (container instanceof ListHandle) {
            command.setParent(parentHandle.getContainerSlotHandle());
          }
 else {
            command.setParent(container);
          }
        }
      }
 else       if (parentModel instanceof SlotHandle) {
        command.setParent(parentModel);
      }
 else {
        command.setParent(SessionHandleAdapter.getInstance().getReportDesignHandle());
      }
      command.execute();
      SessionHandleAdapter.getInstance().getReportDesignHandle().getCommandStack().commit();
    }
 catch (    Exception e) {
      SessionHandleAdapter.getInstance().getReportDesignHandle().getCommandStack().rollback();
    }
  }
  if (parentModel instanceof LibraryHandle) {
    try {
      HandleAdapterFactory.getInstance().getLibraryHandleAdapter().setCurrentEditorModel(handle,LibraryHandleAdapter.CREATE_ELEMENT);
    }
 catch (    Exception e) {
    }
  }
  return handle;
}