What is seen to actually occur if a female were to be the subject of laying on of the hands in ordination?

What is seen to actually occur if a female were to be the subject of laying on of the hands in ordination? The CCC 1577 states that "...the ordaination of women is not possible". What (in the Catholic view) would actually happen if a validly ordained Bishop attempted to ordain a female to ministry? Would the Holy Spirit refuse to flow through and into the women, thus not marking her indelibly with the spiritual character of a priest? Or would the spirit flow, but be disagreeable to catholic doctrine?