clone_error.cpp

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * Written (W) 2013 Soumyajit De
 */
 
#include <shogun/lib/common.h>
#include <shogun/lib/SGMatrix.h>
#include <shogun/features/SparseFeatures.h>
#include <shogun/mathematics/logdet/SparseMatrixOperator.h>

using namespace shogun;
using namespace std;

void test()
{
  const int32_t size=2;
  SGMatrix<float64_t> m(size, size);
  m.set_const(1.0);

  CSparseFeatures<float64_t> feat(m);
  SGSparseMatrix<float64_t> sp_mat=feat.get_sparse_feature_matrix();

  CSparseMatrixOperator<float64_t>* mat=new CSparseMatrixOperator<float64_t>(sp_mat);
  CSparseMatrixOperator<float64_t>* cloned
    =dynamic_cast<CSparseMatrixOperator<float64_t>*>(mat->clone());

  if (mat->equals(cloned))
    SG_SPRINT("Voila!\n");

  SG_UNREF(mat);
  SG_UNREF(cloned);
}

int main(int argc, char **argv)
{
  init_shogun_with_defaults();
  //sg_io->set_loglevel(MSG_GCDEBUG);
  sg_io->set_loglevel(MSG_DEBUG);

  test();

  exit_shogun();
 
  return 0;
}

relevant_output.log

Voila!
[GCDEBUG] unref() refcount 0, obj SparseMatrixOperator (0x6462a0) destroying
[GCDEBUG] SparseMatrixOperator destroyed (0x6462a0)
[GCDEBUG] LinearOperator destroyed (0x6462a0)
[GCDEBUG] SGObject destroyed (0x6462a0)
[GCDEBUG] unref() refcount 0, obj SparseMatrixOperator (0x647580) destroying
[GCDEBUG] SparseMatrixOperator destroyed (0x647580)

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff707aae0 in shogun::sg_generic_free<shogun::SGSparseVector<double> > (ptr=0x6488c0) at lib/memory.cpp:349
349	SG_SPECIALIZED_MALLOC(SGSparseVector<float64_t>)