Markus Junginger wrote:

I perfectly see that MDB_VL32 is the superior as a feature. On the other hand I'm a bit worried that it may hold up LMDB development for use cases you refer to as obsolete yourself.

While there are workarounds for this particular bug (which we applied),

There was never a bug here. The doc is quite explicit http://www.lmdb.tech/doc/group__mdb.html#ga73a5938ae4c3239ee11efa07eb22b882

After txn_abort the only valid call on a still-open cursor is cursor_renew, not cursor_close.