1. A computer-readable medium having computer-executable instructions for causing a computer to perform steps comprising: receive exception results; supply one or more exception handler functions; for each respective exception in the exception results, determine if the respective exception is one of a kind of exceptions handled by the one or more exception handler functions; and if the respective exception is one of the kind handled by the exception handler functions, then run a particular handler of the exception handler functions and mark the respective exception as handled.