Wt

I am working on a password authentication module, where the passwordhash and the salt are stored in a mysql database. This very simple code gives me a consistent segfault:

Wt::Dbo::backend::MySQL database
    ( conf.mysql_database
      , conf.mysql_user
      , conf.mysql_password
      , conf.mysql_server_ip
      , conf.mysql_server_port
      , conf.mysql_client_socket.string() );

std::string username("user");
std::string password("12345");

Wt::Dbo::Session session;
session.setConnection(database);

std::string authenticated;
{
  Wt::Dbo::Transaction transaction(session);          
  authenticated = session.template query<std::string>
    ("select sha1(?), salt from User where username = ?")
    .bind(password)
    .bind(username);
}

After tracing the segfault it happens in

Wt/Dbo/backend/MySQL.C:138

in the function

virtual void MySQLStatement::bind(int column, const std::string& value)