The new selection concept (see T23751) provides basic classes to introduce the new mechanism. One of the classes is the QmitkDataStorageSimpleTreeModel used by QmitkDataStorageTreeInspector.
This class is an implementation of the QmitkAbstractDataStorageModel and provides an implementation of the UpdateModelData-function and the DataStorageChanged-function.
However, if DataStorageChanged is invoked, which in turn invokes UpdateModelData, the workbench crashes in int QmitkDataStorageTreeModelInternalItem::GetIndex() const.
UpdateModelData is also invoked on initialization when e.g. the data storage is set for the first time. Here no crash happens.