In previous Berkeley DB releases, the DB_ENV->set_paniccall and DB->set_paniccall methods were used to register a callback function, called if the database environment failed. In the 4.5 release, this functionality has been replaced by a general-purpose event notification callback function, set with the DB_ENV->set_event_notify() method. Applications should be updated to replace DB_ENV->set_paniccall and DB->set_paniccall calls with a call to DB_ENV->set_event_notify(). This also requires the callback function itself change, as the callback signatures are different.

The DB_ENV->set_paniccall and DB->set_paniccall calls are expected to be removed in a future release of Berkeley DB.