Comment 1 for bug 832131

The *_multi methods take "key" and "key_prefix" arguments. From a quick review of the code, it looks like f the key gets to check_key as '', then it is indeed the key and not the key_prefix, is empty. Also see _map_and_prefix_keys() where it checks "if not key_prefix" before calling check_key(key_prefix).

Can you provide a proposed patch which fixes this? From looking at the code, it's not clear to me what change you are proposing.