A, a builder, contracts to erect and finish a house by the first of January, in order that B may give possession of it at that time to C, to whom B has contracted to let it. A is informed of the contract between B and C. A builds the house so badly that, before the first of January, it falls down and has to be rebuilt by B, who in consequence, loses the rent which he was to have received from C, and is obliged to make compensation to C for the breach of his contract.