Full_Name: Argyrios Kyrtzidis Version: LMDB master OS: OSX URL: Submission from: (NULL) (2601:646:8900:3c89:b9af:5cb2:7292:8835) With latest lmdb source (github mirror: 8fff90db7ed1e650395f39f9e8b22673aa74aa2b), there is an assertion hit when deleting the cursor and then doing mdb_cursor_get(MDB_NEXT) and 'entering' DUPSORT items. To demonstrate see below diff which modifies mtest3.c. When run you see this: mdb.c:6424: Assertion 'mc->mc_flags & C_INITIALIZED' failed in mdb_cursor_next() ==== diff --git a/libraries/liblmdb/mtest3.c b/libraries/liblmdb/mtest3.c dedex 73ee6e2..a9eb011 100644 --- a/libraries/liblmdb/mtest3.c +++ b/libraries/liblmdb/mtest3.c @@ -62,6 +62,19 @@ int main(int argc,char * argv[]) data.mv_size = sizeof(sval); data.mv_data = sval; + memset(sval, sizeof(sval), 0); + memset(kval, sizeof(kval), 0); + kval[0] = 1; + mdb_put(txn, dbi, &key, &data, 0); + kval[0] = 2; + mdb_put(txn, dbi, &key, &data, 0); + sval[0] = 1; + mdb_put(txn, dbi, &key, &data, 0); + E(mdb_cursor_open(txn, dbi, &cursor)); + E(mdb_cursor_get(cursor, &key, &data, MDB_NEXT)); + E(mdb_cursor_del(cursor, 0)); + E(mdb_cursor_get(cursor, &key, &data, MDB_NEXT)); // Assertion hit. + printf("Adding %d values\n", count); for (i=0;i<count;i++) { if (!(i & 0x0f))