var*var arrays do not work

[MoAly98]

It seems like if there is a varvar awkward array in the data, the evaluation of new branches using the varvar branch breaks.

For example, tHbb boosted ljet with trackjet indicies.

[MoAly98]

765017 * {"ntaus": int64, "mu": var * {"pt": float32, "eta": float32, "phi": float32, "e": float32, "ID": float32, "tight": int8, "ID_qualtiy": int8, "iso_PLIV": int8, "truthIFFClass": int32, "PLIVTight": int8}, "jet": var * {"pt": float32, "eta": float32, "phi": float32, "e": float32, "pcbt": int32, "truthflav": int32, "partonlabel": int32}, "weight": float64, "el": var * {"pt": float32, "eta": float32, "phi": float32, "e": float32, "ID": float32, "tight": int8, "ID_qualtiy": int8, "iso_PLIV": int8, "truthIFFClass": int32, "PLIVTight": int8}, "met": {"px": float32, "py": float32, "met": float32, "phi": float32, "sumet": float32}, "ljet": var * var * {"pt": float32, "eta": float32, "phi": float32, "e": float32, "m": float32, "truthlabel": int32, "xbb_top": float32, "xbb_qcd": float32, "xbb_higgs": float32, "tjet_idx": int64}}