Re: [LMDB] Unexpected behavior for MDB_MULTIPLE with zero-length page

On 12/02/17 05:19, Bryan Matsuo wrote:

I noticed that, for in a corner case of the mdb_cursor_put function when MDB_MULTIPLE is provided, if the number of items is specified to be zero this may lead to garbage data being written or a segfault. My intuition would be that this is essentially a noop, but I also would have thought EINVAL would be an acceptable error code

EINVAL. If the key does not exist, you're asking LMDB to create a key with no data. That is not supported. I'll file an ITS, with a few other corner cases I noticed as well.