<p>I would say the origin of the problem is calls to get_urecord() without release_urecord()</p>
<pre><code>/*!
 * \brief Release urecord previously obtained through get_urecord
 * \warning Failing to calls this function after get_urecord will
 * result in a memory leak when the DB_ONLY mode is used. When
 * the records is later deleted, e.g. with delete_urecord, then
 * its not necessary, as this function already releases the record.
 * \param _r released record
 */
void release_urecord(urecord_t* _r)
{
        if (db_mode==DB_ONLY) {
                free_urecord(_r);
        } else if (_r->contacts == 0) {
                mem_delete_urecord(_r->slot->d, _r);
        }
}
</code></pre>

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