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[igraph] Memory Leak - Automorphisms

From: Kyle Bishop
Subject: [igraph] Memory Leak - Automorphisms
Date: Wed, 1 Oct 2008 13:33:53 -0500


Could you please help me with the following problem? I need to compute the number of automorphisms of a series of (random) graphs; however, there seems to be a memory leak in the function igraph_automorphisms. The following c-code reproduces the problem - i.e., the memory used by the program increases without bound.

I'm using the latest version of igraph as distributed by 'yum' on Fedora 9.

Thank you for any help that you can give. I REALLY like the igraph libraries, and I do not want to search for another :)

Best Regards,

#include <igraph.h>

int main(void) {
  igraph_t graph;
  igraph_vector_t v;
  igraph_bliss_sh_t sh=IGRAPH_BLISS_FM;
  igraph_bliss_info_t info; 

  int i,iMax=1000000;

  igraph_real_t edges[] = { 0, 1, 1, 2, 2, 0 };
  igraph_vector_view(&v, edges, sizeof(edges)/sizeof(double));

  for(i=0;i<iMax;i++) {
    igraph_create(&graph, &v, 0, IGRAPH_UNDIRECTED);

  return 0;

Kyle Bishop
Ph.D. Candidate
Chemical & Biological Engineering
Northwestern University

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