56. Agreement to do impossible act. —An agreement to do an act impossible in itself is void. —An agreement to do an act impossible in itself is void." Contract to do act afterwards becoming impossible or unlawful.—A contract to do an act which, after the contract is made, becomes impossible, or, by reason of some event which the promisor could not prevent, unlawful, becomes void when the act becomes impossible or unlawful.1 —A contract to do an act which, after the contract is made, becomes impossible, or, by reason of some event which the promisor could not prevent, unlawful, becomes void when the act becomes impossible or unlawful.2" Compensation for loss through non-performance of act known to be impossible or unlawful.—Where one person has promised to do something which he knew, or, with reasonable diligence, might have known, and which the promisee did not know, to be impossible or unlawful, such promisor must make compensation to such promisee for any loss which such promisee sustains through the non-performance of the promise. —Where one person has promised to do something which he knew, or, with reasonable diligence, might have known, and which the promisee did not know, to be impossible or unlawful, such promisor must make compensation to such promisee for any loss which such promisee sustains through the non-performance of the promise."
