FreeTDS cored when connect to SQL Server

Hi, all,

I have find cores when I connect to SQL Server through  FreeTDS library, and find no clue when searching the mail list archive.
Maybe someone can help me here.
Thanks.

Blow is version info:
FreeTDS: freetds-0.82-1,freetds-unixODBC-0.82-1
SQL Server: 2008R2.
OS is CentOS 5.1.

The stack info is:
#0  0xb7ef4410 in __kernel_vsyscall ()
#1  0xb7db6040 in raise () from /lib/i686/nosegneg/libc.so.6
#2  0xb7db7a21 in abort () from /lib/i686/nosegneg/libc.so.6
#3  0xb7daf40b in __assert_fail () from /lib/i686/nosegneg/libc.so.6
#4  0xb7d6a4cc in ?? () from /usr/lib/libsybdb.so.5
#5  0xb7d6a8dc in ?? () from /usr/lib/libsybdb.so.5
#6  0xb7d6aa1d in ?? () from /usr/lib/libsybdb.so.5
#7  0xb7d53fd2 in ?? () from /usr/lib/libsybdb.so.5
#8  0xb7d4fee9 in ?? () from /usr/lib/libsybdb.so.5
#9  0xb7d38337 in dbsqlsend () from /usr/lib/libsybdb.so.5
#10 0xb7d39d02 in dbsqlexec () from /usr/lib/libsybdb.so.5
......


Blow is some of my code:
static int msg_handler(DBPROCESS *dbproc, DBINT msgno, int msgstate, int severity,char *msgtext, char *srvname, char *procname, int line)
{
        enum {changed_database = 5701, changed_language = 5703 };

        if (msgno == changed_database || msgno == changed_language)
                return 0;

        if (msgno > 0) {
                SD_DEBUG_STATD( "Msg %ld, Level %d, State %d\n", (long) msgno, severity, msgstate);

                if (strlen(srvname) > 0)
                        SD_DEBUG_STATD("Server '%s', ", srvname);
                if (strlen(procname) > 0)
                        SD_DEBUG_STATD("Procedure '%s', ", procname);
                if (line > 0)
                        SD_DEBUG_STATD("Line %d", line);

                SD_DEBUG_STATD("\n\t");
        }
        SD_DEBUG_STATD("%s\n", msgtext);

        if (severity > 10) {
                SD_DEBUG_STATD("%s: error: severity %d >10, exiting\n",options.appname, severity);
                exit(severity);
        }

        return 0;
}

static int err_handler(DBPROCESS * dbproc, int severity, int dberr, int oserr,char *dberrstr, char *oserrstr)
{
        if (dberr) {
                SD_DEBUG_STATD("%s: Msg %d, Level %d\n",
                                options.appname, dberr, severity);
                SD_DEBUG_STATD("%s\n\n", dberrstr);
        }

        else {
                SD_DEBUG_STATD("%s: DB-LIBRARY error:\n\t", options.appname);
                SD_DEBUG_STATD("%s\n", dberrstr);
        }

        return INT_CANCEL;
}

#define SQLSERVER_SERVER                "MSSQLServer"
#define FREETDS_MAX_SELECT_SIZE 128000
int init_sql_handle(char *user,char *pwd)
{
        char param_server[256];
        DBINT result;
        char sql_cmd[1024]={0};

         if ( !user || !pwd || !user[0] || !pwd[0]){
                return ERR_CD_INVALID_ARGUMENTS;
                }
         if (dbproc){
                 dbclose (dbproc);
                 dbproc = NULL;
         }
         if (cddblogin){
                 dbloginfree(cddblogin);
                 cddblogin = NULL;
         }else{
                 options.appname="StatDaemon";
                 options.dbname=LOGDB;
                 options.username=strdup(user);
                 options.password=strdup(pwd);
                 if (dbinit() == FAIL) {
                         SD_DEBUG_STATD("DBinit() failed\n");
                         return FAILED;
                 }

                 dberrhandle(err_handler);
                 dbmsghandle(msg_handler);
         }
         cddblogin = dblogin();
         if (cddblogin == NULL){
                 SD_DEBUG_STATD("Failed to init dblogin\n");
                 return FAILED;
         }
         DBSETLUSER(cddblogin,user);
         DBSETLPWD(cddblogin, pwd);
         DBSETLAPP(cddblogin, ESGLOGDB);
         dbproc = dbopen(cddblogin, SQLSERVER_SERVER);
         if (dbproc == NULL) {
                 SD_DEBUG_STATD("Failed to dbopen handle with user=%s,pwd=%s\n", user,pwd);
                 return ERR_CD_DB_OFFBOX;
         }
         if ((result = dbuse(dbproc, ESGLOGDB)) == FAIL) {
                 SD_DEBUG_STATD("Unable to use to database %s\n",ESGLOGDB);
                 return ERR_CD_DB_OFFBOX;
         }
         sprintf(sql_cmd,"set textsize %d",FREETDS_MAX_SELECT_SIZE);
         dbcmd(dbproc, sql_cmd);
         if (FAIL == dbsqlexec (dbproc))
         {
                 SD_DEBUG_STATD("Unable to set text size %s\n",sql_cmd);
                 return ERR_CD_DB_OFFBOX;
         }
         return SUCCESS;
}




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