d85918aebf
When a validator is already shut down, val->name becomes NULL. We need to process and keep the ISC_R_CANCELED or ISC_R_SHUTTINGDOWN result code before calling validate_async_done(), otherwise, when it is called with the hardcoded DNS_R_NOVALIDSIG result code, it can cause an assetion failure when val->name (being NULL) is used in proveunsecure().