Bug in cursor behaviour with duplicates

Question

Dear Oracle guys and girls,
first of all: it sucks that i HAVE to provide business information (company name, address, even phone number) even if i just want to participate in this forum for private reasons. I even have to "unsubscribe" to the newsletters although i never subscribed. Then i have to re-enter my timezone information and email address for the forum, because the settings in my profile are ignored. I think there's some room for improvement in this registration process.
OK - back to topic. i think i found a bug in the cursor behaviour with duplicate keys. But the behaviour is very consistent, so maybe it's not a bug, but a bad design. (I call it bad because it's totally unexpected and not logical to me).
I insert some dupes with DB_KEYFIRST; then i create a cursor and iterate over all items in the reverse order (!) with DB_PREV (i also tried DB_PREV|DB_NEXT_DUPE) - no keys are shown.
Alternatively:
I insert some dupes with DB_KEYLAST; then i create a cursor and iterate over all items in the reverse order (!) with DB_NEXT (i also tried DB_NEXT|DB_NEXT_DUPE) - no keys are shown.
cursor->c_get returns the error code -30989 (DB_NOTFOUND).
Why is it not possible to traverse duplicates in the reverse order? To me it looks like a bug.
I tested against db 4.5.20.
Regards
Chris
PS: I would love to hear if the bug i reported here: http://groups.google.com/group/comp.databases.berkeley-db/browse_thread/thread/ed471cf6837cb2a6/dd9cda0ad105f401#dd9cda0ad105f401
will be fixed in the next version.
Here's a test program:
int
main(int argc, char **argv)
unsigned i;
int st;
DB *db;
DBT key, record;
DBC cursor, cursor2;
unlink("test.bdb");
st=db_create(&db, 0, 0);
if (st)
error("db_create", st);
st=db->set_flags(db, DB_DUP);
if (st)
error("db->set_flags", st);
st=db->open(db, 0, "test.bdb", 0, DB_BTREE, DB_CREATE, 0);
if (st)
error("db->open", st);
memset(&key, 0, sizeof(key));
memset(&record, 0, sizeof(record));
st=db->cursor(db, 0, &cursor, 0);
if (st)
error("db->cursor", st);
st=db->cursor(db, 0, &cursor2, 0);
if (st)
error("db->cursor", st);
for (i=0; i<LOOPS; i++) {
record.data=&i;
record.size=sizeof(i);
st=cursor->c_put(cursor, &key, &record, DB_KEYFIRST);
st=cursor->c_put(cursor, &key, &record, DB_KEYLAST);
if (st)
error("cursor->c_put", st);
while (!(st=cursor2->c_get(cursor, &key, &record, DB_NEXT))) {
printf("%d\n", *(int *)record.data);
st=cursor->c_close(cursor);
if (st)
error("cursor->c_close", st);
st=db->close(db, 0);
if (st)
error("db->close", st);
return (0);
}

Answer 1

st=cursor->c_put(cursor, &key, &record, DB_KEYFIRST);
st=cursor->c_put(cursor, &key, &record, DB_KEYLAST);
if (st)
error("cursor->c_put", st);
please delete the first line, it was a cut and paste error. as i said earlier: insert with KEYLAST, query with NEXT.