Active content in datatable

Trying to insert counter in datatable’s cell I got script error. Can’t find where I’m wrong?
http://webix.com/snippet/2af0f6c3

When I have removed id-attribute of column with counter error disappears:
http://webix.com/snippet/531e57b1

Another problem was found. When you insert in datatable’s cell a counter and select attribute of datatable is set you get a script error. If select attribute is not set there are no errors:
http://webix.com/snippet/99133930
Is it correct or is it a bug?

If select attribute is not set there are no errors

Yep, that’s a known issue and we’ll fix it. But unfortunately, there’s no any workaround yet.