Invalid read memory(valgrind) QSqlDatabase

• The code below generates an invalid read memory with valgrind. When we remove checking(QSqlDatabse::contains), there is no more error.
• The same issue, when we check DATABASE_CONNECTION_NAME with QsqlDatabase::database(DATABASE_CONNECTION_NAME).isvalid()
• when we use valgrind embedded in QtCreator, there is no problem, but when we execute valgrind in console the issue appear.

// espace réservé du code
if(!QSqlDatabase::contains(DATABASE_CONNECTION_NAME))
{
        QSqlDatabase db(QSqlDatabase::addDatabase(DATABASE_SQL_DRIVER_NAME, DATABASE_CONNECTION_NAME));

        db.setHostName(DEFAULT_IP);
        db.setPort(DATABASE_PORT);
        db.setUserName(DATABASE_USER_NAME);
        db.setPassword(DATABASE_PASSWORD);
        db.setDatabaseName(DATABASE_NAME);
}

Below a part of printed valgrind error