When Env.ReaderList is called with a nil function argument it
behaves as if mdb_env_reader_list() was called with a NULL function
argument, returning an error. Calling ReaderList on an invalid Env
returns an error as well, but has done so for a long time.
When Env.ReaderList is called with a nil function argument it behaves as if mdb_env_reader_list() was called with a NULL function argument, returning an error. Calling ReaderList on an invalid Env returns an error as well, but has done so for a long time.