Core dump

[sam wun]

Hi,

I m new to crypto++ library.
When I execute the following sample code, it caused core dump.
Here is the source:

#include <iostream>

#include <cryptopp/osrng.h>
#include <cryptopp/eccrypto.h>
#include <cryptopp/ec2n.h>
#include <cryptopp/oids.h>
#include <cryptopp/secblock.h>

using namespace CryptoPP;
using namespace std;

int main()
{
 char m[] = "This is the message to be signed";
 cout << m << endl;

 AutoSeededRandomPool rng;
 cout << "rng" << endl;

 ECDSA<EC2N, SHA>::Signer priv(rng, ASN1::sect113r1());
 cout << "ECDSA 0" << endl;

 ECDSA<EC2N, SHA>::Verifier pub(priv);
 cout << "ECDSA" << endl;

 SecByteBlock sig(priv.SignatureLength());
 cout << "SecByteBlock" << endl;

 cout << "Reported signature size: " << priv.SignatureLength() << endl;

 priv.SignMessage(rng, (const byte *)m, strlen(m), sig);

 cout << "Signature size: " << sig.size() << endl;

 if (pub.VerifyMessage((const byte *)m, strlen(m), sig.begin(), sig.size()))
   cout << "OK" << endl;
 else
   cout << "Bad signature!!" << endl;

 return 0;
}

Here is the Makefile to compile the source:
CC = g++
PTHREAD_LIBS   = -lpthread
CXXFLAGS = -O -pipe -W -Wall -Wpointer-arith -D_THREAD_SAFE
INCS = -I/usr/local/include/
LIBS = /usr/local/lib/libcryptopp.a
LIBS += $(PTHREAD_LIBS)

OBJS = cryptest-simple2.o

PROGS = cryptest-simple2

all:    ${PROGS}

cryptest-simple2: ${OBJS}  ${LIBS}
       ${CC} ${CXXFLAGS} -o $@ ${OBJS} ${LIBS} ${INCS}
cryptest-simple2.o: cryptest-simple2.cpp
       $(CC) $(INCS) -c $< -o $@

clean:
       rm -f ${PROGS} *.o *.core

How can I correct the error?

Thanks
Sam.