[igraph] List triangles

[Perrone, Alexander G.]

​How can one list all the triangles in igraph C? I could not find an example in documentation. I'd like the same output as triangles(g) in R. I tried the following as an example but I cannot get it to work. Error is Segmentation fault (core dumped). Any help would be much appreciated. 

#include <igraph.h>

int main(void) {

  igraph_vector_t v;

  igraph_vector_int_t triangles;

  igraph_t graph;

  igraph_real_t edges[] = { 0, 1, 0, 2, 1, 2, 2, 3, 2, 4, 3, 4 };

  igraph_vector_view(&v, edges, sizeof(edges)/sizeof(double));

  igraph_create(&graph, &v, 0, IGRAPH_UNDIRECTED);

  igraph_list_triangles(&graph, &triangles);

  igraph_vector_int_destroy(&triangles);

}

Alex