https://bugs.openldap.org/show_bug.cgi?id=9524
Issue ID: 9524
Summary: Removing last entry in database triggers MDB_PROBLEM
Product: LMDB
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: ---
Component: liblmdb
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
With a fresh database, if you have have an open read transaction, and you
create a new entry in a write transaction and commit it, and then create a new
transaction and delete that entry, when you commit, it will return an
MDB_PROBLEM from approximately line 4408 from the mt_loose_count/dirty_list
check. This seems to occur on mdb.master3, but not mdb.master. Here is a
minimal example/test-case of how to reproduce:
MDB_env* env;
mdb_env_create(&env);
int rc, flags = 0;
mdb_env_open(env, "test", flags, 0664);
MDB_txn* readonly_txn;
mdb_txn_begin(env, nullptr, MDB_RDONLY, &readonly_txn);
MDB_txn* txn;
MDB_dbi dbi;
mdb_txn_begin(env, nullptr, 0, &txn);
mdb_dbi_open(txn, nullptr, MDB_CREATE, &dbi);
MDB_val val;
val.mv_data = (void*) "test";
val.mv_size = 4;
mdb_put(txn, dbi, &val, &val, 0);
mdb_txn_commit(txn);
mdb_txn_begin(env, nullptr, 0, &txn);
mdb_del(txn, dbi, &val, nullptr);
rc = mdb_txn_commit(txn); // this returns MDB_PROBLEM
(let me know if this should be submitted differently)
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