[Bug-glpk] [Fwd: glpk 4.52 - ubuntu 14.04 distribution]

[Andrew Makhorin]

-------- Forwarded Message --------
From: Piotr Wygocki <address@hidden>
To: address@hidden
Subject: glpk 4.52 - ubuntu 14.04 distribution
Date: Mon, 23 Jun 2014 15:13:30 +0200

The following code works fine with glpk-4.45 but fails with glpk 4.52

#include "glpk.h"

int main() {
     double inf = 100000000.;
     glp_prob * m_lp = glp_create_prob();
     glp_load_matrix(m_lp, 0, NULL, NULL, NULL);

     //adding 4 cols
     glp_add_cols(m_lp, 4);

     int colNr = 1;
     glp_set_col_bnds(m_lp, 1, 2, 0, inf);
     glp_set_obj_coef(m_lp, 1 , 2);
     glp_set_mat_col(m_lp, 1, 0, NULL, NULL);

     colNr = 2;
     glp_set_col_bnds(m_lp, colNr, 2, 0, inf);
     glp_set_obj_coef(m_lp, colNr , 3);
     glp_set_mat_col(m_lp, colNr, 0, NULL, NULL);

     colNr = 3;
     glp_set_col_bnds(m_lp, colNr, 2, 0, inf);
     glp_set_obj_coef(m_lp, colNr , 1);
     glp_set_mat_col(m_lp, colNr, 0, NULL, NULL);

     colNr = 4;
     glp_set_col_bnds(m_lp, colNr, 2, 0, inf);
     glp_set_obj_coef(m_lp, colNr , 3);
     glp_set_mat_col(m_lp, colNr, 0, NULL, NULL);

     int m_idx_cols_tmp[3];
     double m_val_cols_tmp[3];

     //adding 4 columns
     int rowNr = glp_add_rows(m_lp, 1);
     glp_set_row_bnds(m_lp, rowNr, 5, 1, 1);
     m_idx_cols_tmp[1] = 2;
     m_val_cols_tmp[1] = 1;
     m_idx_cols_tmp[2] = 1;
     m_val_cols_tmp[2] = 1;
     glp_set_mat_row(m_lp, 1, 2, m_idx_cols_tmp, m_val_cols_tmp);

     rowNr = glp_add_rows(m_lp, 1);
     glp_set_row_bnds(m_lp, rowNr, 5, 1, 1);
     m_idx_cols_tmp[1] = 4;
     m_val_cols_tmp[1] = 1;
     m_idx_cols_tmp[2] = 3;
     m_val_cols_tmp[2] = 1;
     glp_set_mat_row(m_lp, 2, 2, m_idx_cols_tmp, m_val_cols_tmp);

     rowNr = glp_add_rows(m_lp, 1);
     glp_set_row_bnds(m_lp, rowNr, 3, -inf, 2);
     m_idx_cols_tmp[1] = 3;
     m_val_cols_tmp[1] = 1;
     m_idx_cols_tmp[2] = 1;
     m_val_cols_tmp[2] = 2;
     glp_set_mat_row(m_lp, 3, 2, m_idx_cols_tmp, m_val_cols_tmp);

     rowNr = glp_add_rows(m_lp, 1);
     glp_set_row_bnds(m_lp, rowNr, 3, -inf, 2);
     m_idx_cols_tmp[1] = 4;
     m_val_cols_tmp[1] = 1;
     m_idx_cols_tmp[2] = 2;
     m_val_cols_tmp[2] = 2;
     glp_set_mat_row(m_lp, 4, 2, m_idx_cols_tmp, m_val_cols_tmp);

     //solving
     glp_smcp m_glpk_control;
     glp_init_smcp(&m_glpk_control);
     m_glpk_control.msg_lev = GLP_MSG_OFF;
     m_glpk_control.meth = GLP_PRIMAL;

     glp_adv_basis(m_lp, 0);
     glp_simplex(m_lp, &m_glpk_control);

     //deleting 2 columns
     int arr[2];
     arr[0] = 0;
     arr[1] = 4;
     glp_del_cols(m_lp, 1, arr);
     arr[1] = 3;
     glp_del_cols(m_lp, 1, arr);

     //deleting 2 rows
     arr[1] = 4;
     glp_del_rows(m_lp, 1, arr);
     arr[1] = 3;
     glp_del_rows(m_lp, 1, arr);

     //solve
     glp_simplex(m_lp, &m_glpk_control);

     return 0;
}


compilation:

gcc glp.c -lglpk

gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)

fails with:

Assertion failed: ptr < end
Error detected in file bflib/sgf.c at line 99
Aborted (core dumped)

Regards,

Piotr