Rollback on transaction error

w.r.t #645 , how to rollback if any error occurs?

Also most of the time I am getting a deadlock and I have to restart my DB even when there are no errors.
Here is the sample transaction code:

const conn = null;
try {
  conn = await pool.getConnection();
  await conn.beginTransaction();
  await conn.query('INSERT INTO ...', params);
  await conn.commit();
  conn.release();
} catch (e) {
  // rollback here
}

No file or test is named. Start by reading issue #645 and tracing the transaction and connection-pool APIs used by the sample; reproduce the rollback and deadlock reports with a focused test or minimal case. Done means the expected rollback and connection-release behavior is established and the deadlock cause or a documented limitation is identified.