We already mentioned that one is not supposed to break the bones of a Passover sacrifice. One can even be punished for doing so (of course, the usual rules of giving him a warning not to do it, within a few seconds before the act, apply). However, one is not punished for another prohibited action - leaving the meat over till morning. Why not? Some say - because you cannot punish for not doing. Others - that anytime something is prohibited but a correction is suggested - here, by burning it, you can't punish for it.
Art: Butcher's shop by Annibale Carracci