res->getString(1) mysql connector crash debug - c++

Question

I have a problem when i use mysql connector c++ and visual studio on the debug mode. It compiles just fine. My algorithm works on release mode. When i switch to debug mode, he complies but he crash while running.
I believe that he crash each time i use res->getString() .
I m using visual studio 2013, mysql connector.C++ 1.1 . I already added the dependencies
C:\Program Files\MySQL\Connector.C++ 1.1\lib\debug
C:\Program Files\Boost SDK;
C:\Program Files\MySQL\Connector.C++ 1.1\include
mysqlcppconn.lib and mysqlcppconn.dll
CPPCONN_PUBLIC_FUNC= ;HAVE_INT8_T=1 ( on the processor definition)
run time library : /MDd ( it the only think that works )
I copied mysqlcppconn.lib and mysqlcppconn.dll in the debug directory of my project
with this configuration my programm works on release mode ( changing Connector.C++ 1.1\lib\debug to Connector.C++ 1.1\lib\opt ).
In the debug mode, he says Debug Assertion failed :
File: f:\dd\vctools\crt\crtw32\misc\dbgheap.c
Line 1322
Expression : _CrtIsValidHeapPointer( pUserData)
Press Rety to debug the application
then i had to choose one buttom ( Ignore; Restart ; leave ). When i press Ignore he continue to run i have the first results but he crashs again
This is my code section
{
#include <stdlib.h>
#include <iostream>
#include <sstream>
#include <stdexcept>
#include <memory>
#include <string>
/* MySQL Connector/C++ specific headers */
#include <cppconn/driver.h>
#include <cppconn/connection.h>
#include <cppconn/statement.h>
#include <cppconn/prepared_statement.h>
#include <cppconn/resultset.h>
#include <cppconn/metadata.h>
#include <cppconn/resultset_metadata.h>
#include <cppconn/exception.h>
#include <cppconn/warning.h>
#include "mysql_connection.h"
using namespace std;
using namespace sql;
int main(int argc, const char **argv)
{
const char* str_DataBaseMarketData_Server = "root";
const char* str_DataBaseMarketData_User = "root";
const char* str_DataBaseMarketData_Password ="root";
const char* str_DataBaseMarketData_Database ="bd test";
cout << "Connector/C++ tutorial framework..." << endl;
cout << endl;
string fld;
try {
sql::Driver* driver = get_driver_instance();
std::auto_ptr<sql::Connection> con(driver->connect(str_DataBaseMarketData_Server, str_DataBaseMarketData_User, str_DataBaseMarketData_Password));
con->setSchema(str_DataBaseMarketData_Database);
std::auto_ptr<sql::Statement> stmt(con->createStatement());
sql::SQLString *data = new SQLString();
std::auto_ptr<sql::ResultSet> res(stmt->executeQuery("SELECT * FROM news "));
//ResultSetMetaData *res_meta = res->getMetaData();
//cout << res_meta->getColumnDisplaySize( 1) << endl << endl;
while (res->next()){
fld = res->getString(2).c_str();
}
}
catch (sql::SQLException &e) {
/*
The MySQL Connector/C++ throws three different exceptions:
- sql::MethodNotImplementedException (derived from sql::SQLException)
- sql::InvalidArgumentException (derived from sql::SQLException)
- sql::SQLException (derived from std::runtime_error)
*/
cout << "# ERR: SQLException in " << __FILE__;
cout << "(" << __FUNCTION__ << ") on line " << __LINE__ << endl;
/* Use what() (derived from std::runtime_error) to fetch the error message */
cout << "# ERR: " << e.what();
cout << " (MySQL error code: " << e.getErrorCode();
cout << ", SQLState: " << e.getSQLState() << " )" << endl;
return EXIT_FAILURE;
}
cout << "Done." << endl;
return EXIT_SUCCESS;
}
}
This things turns me crazy because when i replace getString() by anything else, it works sweetly.Could you help me please ?
I m running under a 32 bit.